PATENT DOCUMENT

Publication Number: US-11372151-B2
Application Number: US-202016919425-A
Country: US
Kind Code: B2

Title: Illuminated device enclosure with dynamic trackpad comprising translucent layers with light emitting elements

Abstract:
Embodiments are directed to an electronic device having an illuminated body that defines a virtual or dynamic trackpad. The electronic device includes a translucent layer defining a keyboard region and a dynamic input region along an external surface. A keyboard may be. positioned within the keyboard region and including a key surface and a switch element (e.g., to detect a keypress). A light control layer positioned below the translucent layer and within the dynamic input region may have a group of illuminable features. The electronic device may also include a group of light-emitting elements positioned below the optical diffuser. One or more of the light control layer or the group of light-emitting elements may be configured to illuminate the dynamic input region to display a visible boundary of an active input area. At least one of a size or a position of the visible boundary may be dynamically variable.

Claims:
What is claimed is: 
     
       1. A notebook computer comprising:
 an upper portion comprising a display; 
 a lower portion pivotally coupled with the upper portion and comprising:
 a keyboard region configured to receive keypress inputs; and 
 a dynamic input region along a side of the keyboard region, the dynamic input region defined at least in part by:
 a stack of translucent layers comprising:
 a first translucent layer defining an exterior surface and comprising first light-extraction features; and 
 a second translucent layer positioned below the first translucent layer and comprising second light-extraction features; 
 
 
 a first light-emitting element configured to propagate light through the first translucent layer to the first light-extraction features to illuminate a first active input area; and 
 a second light-emitting element configured to propagate light through the second translucent layer to the second light-extraction features to illuminate a second active input area; and 
 
 a processor configured to:
 in a first mode of operation, control the first light-emitting element to illuminate the first active input area via the first light-extraction features; and 
 in a second mode of operation, control the second light-emitting element to illuminate the second active input area via the second light-extraction features, wherein:
 the first active input area has a first size; and 
 the second active input area has a second size, the second size smaller than the first size. 
 
 
 
     
     
       2. The notebook computer of  claim 1 , wherein the keyboard region comprises a set of illuminable key caps that extend through the lower portion. 
     
     
       3. The notebook computer of  claim 1 , wherein:
 the first active input area overlaps with a portion of the second active input area, thereby defining:
 an overlapping portion of the dynamic input region in which the first active input area overlaps with the second active input area; and 
 a non-overlapping portion of the dynamic input region in which the first active input area does not overlap with the second active input area; 
 
 the overlapping portion of the dynamic input region defines a center region of the dynamic input region; and 
 the non-overlapping portion of the dynamic input region defines a periphery of the dynamic input region. 
 
     
     
       4. The notebook computer of  claim 3 , wherein:
 the overlapping portion is illuminated by:
 the first light-emitting element via the first light-extraction features; and 
 the second light-emitting element via the second light extraction features; 
 
 the non-overlapping portion is illuminated by the first light-emitting element via the first light-extractions features; and 
 the first light-emitting element and the second light-emitting element are selectively illuminable. 
 
     
     
       5. The notebook computer of  claim 4 , wherein the second light-emitting element illuminates the second light-extraction features after the first light-emitting element illuminates the first light-extraction features to display an activation of the non-overlapping portion within the dynamic input region. 
     
     
       6. The notebook computer of  claim 3 , wherein a first intensity of light emitted from the overlapping portion is higher than a second intensity of light emitted from the non-overlapping portion. 
     
     
       7. The notebook computer of  claim 1 , wherein:
 the stack of translucent layers further comprises a third translucent layer positioned below the second translucent layer and comprising third light-extraction features; and 
 the lower portion further comprises a third light-emitting element configured to propagate light through the third translucent layer to the third light-extraction features to illuminate a third active input area, the third active input area different from the first active input area and from the second active input area. 
 
     
     
       8. The notebook computer of  claim 7 , wherein:
 a portion of the second active input area extends around a periphery of the third active input area; and 
 the first active input area, the second active input area, and the third active input area are selectively illuminable. 
 
     
     
       9. An electronic device comprising:
 an upper portion comprising a display; and 
 a lower portion pivotally coupled with the upper portion and comprising:
 a first translucent layer defining an external surface of the electronic device and comprising first light-extraction features defining a first input area; 
 a second translucent layer positioned below the first translucent layer and comprising second light-extraction features defining a second input area, the second input area smaller than the first input area; 
 a first light-emitting element optically coupled with the first translucent layer along a first side of the first translucent layer and configured to direct light through the first translucent layer to illuminate the first input area; 
 a second light-emitting element optically coupled with the second translucent layer along a second side of the second translucent layer and configured to direct light through the second translucent layer to illuminate the second input area; and 
 a processing unit configured to:
 in a first mode of operation, illuminate the first input area; and 
 in a second mode of operation, illuminate the second input area, wherein: 
 
 
 a portion of the first input area extends around a periphery of the second input area; and 
 the second input area is illuminated both by the first light-emitting element and the second light-emitting element. 
 
     
     
       10. The electronic device of  claim 9 , wherein:
 the first translucent layer comprises a first internal reflection region positioned between the first light-emitting element and the first light-extraction features and configured to channel light from the first light-emitting element to the first light-extraction features; and 
 the second translucent layer comprises a second internal reflection region positioned between the second light-emitting element and the second light-extraction features and configured to channel light from the second light-emitting element to the second light-extraction features. 
 
     
     
       11. The electronic device of  claim 9 , wherein:
 in the first mode of operation, the second input area is unilluminated; and 
 in the second mode of operation, both the second input area and the first input area are illuminated. 
 
     
     
       12. The electronic device of  claim 9 , further comprising:
 a third translucent layer positioned below the second translucent layer and comprising third light-extraction features defining a third input area; and 
 a third light-emitting element optically coupled with the third translucent layer along a third side of the third translucent layer and configured to direct light through the third translucent layer to illuminate the third input area. 
 
     
     
       13. The electronic device of  claim 12 , wherein:
 a portion of the first input area extends around a periphery of the second input area; 
 a portion of the second input area extends around a periphery of the third input area; and 
 the third input area is illuminated by the first light-emitting element, the second light-emitting element, and the third light-emitting element. 
 
     
     
       14. The electronic device of  claim 12 , wherein the processing unit is further configured to, in a third mode of operation, illuminate the third input area. 
     
     
       15. The electronic device of  claim 14 , wherein the processing unit operates the first light-emitting element, the second light-emitting element, and the third light-emitting element in sequence to display a transition between the first mode of operation, the second mode of operation, and the third mode of operation. 
     
     
       16. An electronic device comprising:
 an enclosure; 
 a display positioned at least partially within the enclosure; 
 a keyboard coupled to the enclosure and along a side of the display; 
 a plurality of translucent layers defining a dynamic input region positioned along a side of the keyboard and comprising:
 a stack of translucent layers comprising:
 a first translucent layer comprising first light-extraction features; 
 a second translucent layer comprising second light-extraction features; and 
 a third translucent layer comprising third light-extraction features; 
 
 a first light-emitting element configured to illuminate the first light-extraction features; 
 a second light-emitting element configured to illuminate the second light-extraction features; and 
 a third light-emitting element configured to illuminate the third light-extraction features; and 
 
 a processor configured to:
 in a first mode of operation, control the first light-emitting element to illuminate the first light-extraction features; 
 in a second mode of operation, control the second light-emitting element to illuminate the second light-extraction features; and 
 in a third mode of operation, control the third light-emitting element to illuminate the third light-extraction features, wherein:
 the dynamic input region has a first size in the first mode of operation; 
 the dynamic input region has a second size in the second mode of operation, the second size larger than the first size; and 
 the dynamic input region has a third size in the third mode of operation, the third size larger than the second size. 
 
 
 
     
     
       17. The electronic device of  claim 16 , wherein the processor transitions between the first mode, the second mode, and the third mode as a size of the dynamic input region changes. 
     
     
       18. The electronic device of  claim 16 , further comprising a sensing element positioned within the enclosure and configured to detect a user input within the dynamic input region.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation of U.S. patent application Ser. No. 15/965,840, filed Apr. 27, 2018, which is a nonprovisional patent application of and claims the benefit of U.S. Provisional Patent Application No. 62/555,027, filed Sep. 6, 2017 and titled “Illuminated Device Enclosure with Dynamic Trackpad,” the contents of which are incorporated herein by reference as if fully disclosed herein. 
    
    
     FIELD 
     The described embodiments relate generally to input surfaces of an electronic device. More particularly, the present embodiments relate to an illuminated electronic device enclosure or body that defines an input surface. 
     BACKGROUND 
     In computing systems, an input device may be employed to receive input from a user. Some traditional input devices include large buttons, keys, or other mechanically-actuated structures. However, these types of input devices may lack flexibility or adaptability and may permanently indicate the presence of the input device within the computing system. 
     SUMMARY 
     Embodiments of the present invention are directed to an electronic device having an illuminated enclosure that defines a dynamic input surface. 
     In a first aspect, the present disclosure includes an electronic device. The electronic device includes an upper portion. The upper portion includes an upper enclosure defining an opening. The upper portion further includes a display positioned at least partially within the opening and configured to depict a graphical output. The electronic device further includes a lower portion pivotally coupled with the upper portion. The lower portion includes a lower enclosure having a translucent layer that defines an active input area and an array of light-extraction features positioned within the active input area. The lower portion further includes a keyboard positioned along an upper surface of the lower enclosure and configured to receive a keypress. The lower portion further includes a light-emitting element positioned along a side of the translucent layer and configured to propagate light through the translucent layer to the light-extraction features to illuminate the active input area. The lower portion further includes a processing unit configured to modify the graphical output in response to the keypress and modify the graphical output in response to an input received along the active input area when the active input area is illuminated. 
     In a second aspect, the present disclosure includes an electronic device. The electronic device includes a translucent layer defining a keyboard region and a dynamic input region along an external surface of the electronic device. The electronic device further includes a keyboard positioned within the keyboard region. The keyboard includes a key surface and a switch element configured to detect a keypress. The electronic device further includes a light control layer positioned below the translucent layer within the dynamic input region and having a group of illuminable features. The electronic device further includes an optical diffuser positioned below the light control layer. The electronic device further includes a group of light-emitting elements positioned below the optical diffuser and configured to propagate light through the optical diffuser, the light control layer, and the translucent layer. One or more of the light control layer or the group of light-emitting elements may be configured to illuminate the dynamic input region to display a visible boundary of an active input area. At least one of a size or a position of the visible boundary may be dynamically variable. 
     In a third aspect, the present disclosure includes an electronic device. The electronic device includes an enclosure. The electronic device further includes a display positioned at least partially within the enclosure. The electronic device further includes a keyboard positioned along an upper surface of the enclosure. The electronic device further includes a translucent layer defining a dynamic input region along a side of the keyboard. The dynamic input region may have an active input area that is designated by a visual boundary. The electronic device further includes a group of light-emitting elements optically coupled with the translucent layer and configured to depict a visual output within the dynamic input region. The electronic device further includes a sensing element positioned within an interior volume of the enclosure and configured to detect an input along the active input area when the visual boundary is illuminated. 
     In addition to the exemplary aspect and embodiments described above, further aspects and embodiments will become apparent by reference to the drawings and by study of the following description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will be readily understood by the following detailed description in conjunction with the accompanying drawings, wherein like reference numerals designate like elements. 
         FIG. 1A  depicts a sample electronic device including a dynamic input region; 
         FIG. 1B  depicts a cross-sectional view of a tactile switch assembly of the sample electronic device of  FIG. 1A , taken along line A-A of  FIG. 1A ; 
         FIG. 1C  depicts an enlarged view of the dynamic input region having an illuminated input area; 
         FIG. 1D  depicts an enlarged view of the dynamic input region having a modified illuminated input area; 
         FIG. 1E  depicts an enlarged view of the dynamic input region depicting a visual output; 
         FIG. 2A  depicts a cross-sectional view of the dynamic input region of  FIG. 1A , taken along line B-B of  FIG. 1A ; 
         FIG. 2B  depicts a cross-sectional view of the dynamic input region of  FIG. 1A , taken along line B-B of  FIG. 1A ; 
         FIG. 2C  depicts a cross-sectional view of the dynamic input region of  FIG. 1A , taken along line B-B of  FIG. 1A ; 
         FIG. 2D  depicts a cross-sectional view of the dynamic input region of  FIG. 1A , taken along line B-B of  FIG. 1A ; 
         FIG. 2E  depicts a cross-sectional view of the dynamic input region of  FIG. 1A , taken along line B-B of  FIG. 1A ; 
         FIG. 2F  depicts a cross-sectional view of the dynamic input region of  FIG. 1A , taken along line B-B of  FIG. 1A ; 
         FIG. 3A  depicts a top view of a sample electronic device having an active input area illuminated within a dynamic input region; 
         FIG. 3B  depicts a top view of a sample electronic device having another embodiment of an active input area illuminated within a dynamic input region; 
         FIG. 3C  depicts a top view of a sample electronic device having another embodiment of an active input area illuminated within a dynamic input region; 
         FIG. 4A  depicts a top view of a sample electronic device having an active input area and a visual output illuminated within a dynamic input region; 
         FIG. 4B  depicts a top view of a sample electronic device having an active input area and another visual output illuminated within a dynamic input region; 
         FIG. 4C  depicts a top view of a sample electronic device having an active input area and another visual output illuminated within a dynamic input region; 
         FIG. 5A  depicts a top view of a sample electronic device having an active input area and a light trail illuminated within a dynamic input region; 
         FIG. 5B  depicts a top view of a sample electronic device having an active input area and another light trail illuminated within a dynamic input region; 
         FIG. 5C  depicts a top view of a sample electronic device having an active input area and another light trail illuminated within a dynamic input region; 
         FIG. 6A  depicts a top view of a sample electronic device having a keyboard region and dynamic input region; 
         FIG. 6B  depicts a top view of a sample electronic device having a dynamic input region configured to detect multiple inputs; 
         FIG. 7A  depicts a top view of a sample electronic device having an active input area and multiple outputs of the electronic device illuminated on the dynamic input region; 
         FIG. 7B  depicts a top view of a sample electronic device having an active input area and an updateable output of the electronic device illuminated on the dynamic input region; 
         FIG. 7C  depicts a top view of a sample electronic device having an active input area and a dynamic output of the electronic device illuminated on the dynamic input region; 
         FIG. 8A  depicts a sample electronic device having a visual output visible between an upper portion and a lower position of the device arranged in a closed position; 
         FIG. 8B  depicts a sample electronic device having an active input area defined on a dynamic input region when an upper portion and a lower portion of the device are arranged in a closed position; 
         FIG. 9A  depicts a sample portable electronic device; 
         FIG. 9B  depicts a rear surface of the sample portable electronic device of  FIG. 9A  having a dynamic input region; 
         FIG. 10  depicts a sample watch having a dynamic input region; 
         FIG. 11  depicts a sample stylus having an input region; and 
         FIG. 12  illustrates a functional block diagram of an electronic device. 
     
    
    
     The use of cross-hatching or shading in the accompanying figures is generally provided to clarify the boundaries between adjacent elements and also to facilitate legibility of the figures. Accordingly, neither the presence nor the absence of cross-hatching or shading conveys or indicates any preference or requirement for particular materials, material properties, element proportions, element dimensions, commonalities of similarly illustrated elements, or any other characteristic, attribute, or property for any element illustrated in the accompanying figures. 
     Additionally, it should be understood that the proportions and dimensions (either relative or absolute) of the various features and elements (and collections and groupings thereof) and the boundaries, separations, and positional relationships presented therebetween are provided in the accompanying figures merely to facilitate an understanding of the various embodiments described herein and, accordingly, may not necessarily be presented or illustrated to scale, and are not intended to indicate any preference or requirement for an illustrated embodiment to the exclusion of embodiments described with reference thereto. 
     DETAILED DESCRIPTION 
     The description that follows includes sample systems, methods, and apparatuses that embody various elements of the present disclosure. However, it should be understood that the described disclosure may be practiced in a variety of forms in addition to those described herein. 
     The present disclosure describes systems, devices, and techniques related to an electronic device having an illuminated enclosure or body that defines a dynamic input region. The dynamic input region may be defined along an exterior or upper surface of the enclosure formed from a translucent layer or structure. The translucent layer may be selectively illuminated to reveal a customizable active input area (e.g., a virtual track pad) and/or display various visual outputs along the dynamic input region. 
     Visual output may be produced along the translucent layer using a number of different techniques. In a first example, the translucent layer may be illuminated from the side by a light-emitting element. Light is directed toward light-extraction features in the translucent layer that may illuminate a visible boundary of the active input area (e.g., a virtual trackpad). In another example, the translucent layer is illuminated from below by an array of light-emitting elements (or a single light-emitting element) to create a configurable or customizable boundary of the active input area. For example, the active input area may be moved, resized, rearranged, functionally reassigned, or the like along the dynamic input region. The dynamic input region may also depict various other visual outputs or other optical effects, including illuminating a boundary of a touch input, or conveying other information, including dynamic or updateable information of the electronic device. As described herein, the virtual trackpad may be positioned along a side of a keyboard or other structure coupled to the translucent layer configured to receive a keypress or other input. 
     The dynamic input region may be defined along virtually any exterior surface of the electronic device formed by the translucent layer that is configured to receive an input, including a force input, a touch input, and/or a proximity input. The translucent layer may be formed from one or more translucent materials including, for example, glass, ceramic, plastic, or a combination thereof. As used herein, the term translucent or translucent layer may be used to refer to a material or layer that allows the passage of light and does not require that the material or layer be transparent, clear, or otherwise free from features that scatter or absorb some amount of light. In this regard, the term translucent may generally refer to a material or layer that is optically transparent, partially transparent, or otherwise able to transmit light. The translucent layer may be coupled with, or otherwise positioned along, one or more sensing layers or structures within the enclosure, as described herein, including a capacitive-based sensing layer, which may allow the dynamic input region to detect input along the translucent exterior surface of the electronic device. 
     A light-emitting element, or group of light-emitting elements may be positioned within the enclosure and configured to illuminate an active input area within the dynamic input region. The active input area may be a virtual trackpad positioned on a particular area or portion of the dynamic input region configured to control a function of the electronic device in response to an input. For example, while the entire dynamic input region may be configured to detect input, in certain configurations, a specified area or portion of the dynamic input region may define an active input area (e.g., a virtual or dynamic track pad) that is used to control the electronic device in response to detected input; other areas or portions of the dynamic input region may be temporarily unresponsive to input. This may allow the active input area to be customizable within the dynamic input region based on user preferences, such as arranging the active input area in various positions and sizes within the dynamic input region. 
     To facilitate the foregoing, the light-emitting element may thus illuminate a visible boundary of the active input area within the dynamic input region. The visible boundary may indicate to a user the presence and location of input functionality on the device enclosure. For example, in some cases, the dynamic input region and/or the active input area may be concealed from a user. The translucent layer may appear to substantially resemble an exterior surface of an electronic device having no apparent input functionality; however, this is not required. In other cases, the dynamic input region and/or active input area may be optically distinguishable on the exterior surface in an unilluminated state. Once illuminated, the active input area may be manipulated within the dynamic input region and the visible boundary may be updated accordingly, thereby indicating to a user a new or updated location of input functionality on the exterior surface. 
     In a “side-illuminated” embodiment, where the translucent layer is illuminated from the side, the translucent layer may define a light guide that guides or directs light from the light-emitting element and defines the active input area within the dynamic input region. To facilitate the foregoing, the light-emitting element may be a side-firing light-emitting diode (LED) or other light-emitting element positioned along a side of the translucent layer. An internally reflective region of the translucent layer may propagate light received from the light-emitting element along a length of the enclosure toward light-extraction features. The light-extraction features may include textured features that extract light from the translucent layer and illuminate a visible boundary of the active input area. For example, the light-extraction features may have a distinct index of refraction or other optical property that redirects light toward the external surface of the enclosure when the light traverses a boundary between the internally reflective region and the light extraction features. The electronic device may be responsive to input received within the active input area when the visible boundary is illuminated. For example, when the visible boundary is illuminated, a sensing layer (including a capacitive-based sensor) may detect input within the active input area and a display of the electronic device may be responsive to the detected input. 
     In a “bottom-illuminated” embodiment, where the translucent layer is illuminated from beneath the external surface, a light control layer may be used to control the propagation of light through the translucent layer and define the active input area within the dynamic input region. The light control layer may be positioned along an internal surface of the translucent layer and control the propagation of light through the translucent layer using a group of illuminable features. The light control layer may generally impede or impair the propagation of light. The group of illuminable features may be regions of the light control layer where light may propagate from an interior of the electronic device to the translucent layer. 
     The group of illuminable features may be illuminated to define a visible boundary (or other characteristic) of the active input area within the dynamic input region. In a particular embodiment, the light control layer may be an ink, coating, substrate, deposition, or other structure that blocks light and the group of illuminable features may include an array of microperforations forming a channel or passage through the light control layer that defines a boundary of the active input area when illuminated. The array of microperforations may also be selectively illuminated (using an LED matrix or the like) in order to vary a size, position, shape, and so on of the active input area within the dynamic input region. In other embodiments, the light control layer may be a polarizing layer and/or other components that operate to control the passage of light through individual indicators. For example, the group of illuminable features may be individually selectable windows or regions, which may allow light to propagate therethrough in response to a signal (e.g., which may be controlled by a processing unit of the electronic device). 
     The light control layer may be used to define a variety of user-customizable shapes, sizes, positions, configurations, and so forth of the active input area within the dynamic input region. For example, multiple, distinct visible boundaries of the active input area (first visible boundary, second visible boundary, and so on) may be illuminated within the dynamic input region successively. The visible boundaries may correspond to distinct sizes, shapes, positions, and so on of an active input area, which may have a user-customizable shape, size, or the like on the dynamic input region. The electronic device may be responsive to input received within the dynamic input region based on the illuminated boundary of the active input area. Accordingly, the active input area may not be limited to a particular configuration or position within the dynamic input region, but rather may be manipulated by a user into a variety of customizable configurations. This may be beneficial, for example, where the active input area defines a trackpad of a notebook computer; the trackpad can be resized or repositioned along a translucent device enclosure based on user-specified preferences and thus enhance the functionality and/or adaptability on the electronic device. 
     The electronic device may be configured to depict a visual output within the dynamic input region. As described herein, the visual output may be visual cues to prompt an input and, in other cases, may be responsive to, or produced, when the electronic device receives an input. For example, the visual output may cue the user to enter input and/or confirm or provide additional information to a user in response to a detected input. The light-emitting elements described herein may be configured to propagate light through the translucent layer and depict the visual output within the dynamic input region. In some embodiments, the light control layer may be used to control the propagation of light through the translucent layer. The light-emitting element may illuminate the visual output on the translucent exterior surface in response to an input received along the dynamic input region. Sample visual outputs in this regard may include an illumination of a location of a touch input, a path of travel of a touch input along the dynamic input region, the entire active input area, and so on. The visual output may also be used to visually emphasize aesthetic characteristics of the active input area, including emphasizing an interior periphery (corresponding to a gradient brightness, contrast, and/or other optical periphery or visual effect), a boundary thickness or edge fade, and/or adjusting a color or brightness of the active input area, among other possibilities. The visual output may also be used to identify a function of the electronic device that may be controlled or manipulated in response to an input. 
     In some embodiments, the dynamic input region may be used to convey information to the user corresponding to a notification, status, configuration, and/or other information related to the electronic device. For example, the visual output depicted within the dynamic input region, described above, may include or correspond to information related to the electronic device. In some embodiments, the visual output may correspond to a location of a component or assembly of the electronic device, such as a location and/or function related to an inductive charging coil, power button, wireless antenna, and so on. The visual output may also be updateable or dynamic. For example, the visual output may correspond to a power level (battery charge or battery depletion level) of the electronic device, a location and/or strength of a wireless internet connection, and/or other updateable or dynamic information. Accordingly, as described herein, the dynamic input region need not receive an input or be used to control a function of an electronic device. However, it will be appreciated that in some cases the visual output depicted within the dynamic input region may be used to both convey information related to the electronic device and receive an input that controls a function of the electronic device. To illustrate, the dynamic input region may have a visual output corresponding to a strength of a wireless internet signal that may also be displayed on a portion of the translucent layer used to control one or more properties of a wireless internet connection in response to an input (such as selecting a wireless network depicted at a display of the electronic device). 
     Broadly, the dynamic input region may include any appropriate sensing element configured to detect a touch input, force input, and/or proximity input along the exterior translucent surface of the electronic device. The sensing element may be positioned within the enclosure and configured to detect input received within the active input area or more generally along the dynamic input region or other region of the translucent layer (such as a keyboard region, described herein). A user may manipulate the active input area within the dynamic input region. As such, the sensing element may be adaptable to generate an input signal (that controls a function of the electronic device) in response to input received within the input area for a given configuration (e.g., based on a position of the active input area within the dynamic input region). For example, the sensing element may generate an input signal in response to input received within a visible boundary of the input area, but remain substantially unresponsive to input received outside of the visible boundary. 
     In one embodiment, the sensing element may be a non-contact-based sensor that measures various electrical parameters to detect a touch and/or force input, including optical, magnetic, and capacitance-based sensors, among other non-contact-based sensors. In other cases, the sensing element may be, or form a component of, a contact-based sensor, including a tactile dome switch, strain gauge, piezoelectric or electroactive polymer (EAP) stack, or the like, among other contact-based sensors. The sensing element may include multiple combinations of sensors, including contact-based and non-contact-based sensors, that cooperate to measure the force and/or touch input received at the translucent external surface. In some cases, the sensing element may measure localized or generalized deflection or bending of the translucent layer inward and trigger a corresponding switch event. The sensing element may also be configured to produce various haptic effects, as described herein, and/or be coupled with a separate haptic structure that produces a haptic or tactile output along the input region. 
     The sensing element may be configured to detect inputs at distinct regions or areas of the translucent layer. This may allow the dynamic input region to define multiple active input areas on the translucent layer that may each correspond to distinct functions of the electronic device. For example, individual active input areas may correspond to keyboard keys, buttons of a video game controller, or other virtual keys or buttons that may be operated in succession or are otherwise desired to be defined on the translucent layer within one another. In some cases, the sensing layer may also detect input received at the distinct input area concurrently. This may be beneficial, for example, where the translucent layer is used to form a trackpad and one or more buttons within the dynamic input region. For example, the sensing element may detect a scrolling input or motion along an active input defining the trackpad and also detect an input at an active input area defining a button or keyboard key. 
     In a particular embodiment, the electronic device may be a notebook computer and the dynamic input region may be defined on one or more pivotally coupled portions of the enclosure. For example, the enclosure may include an upper portion pivotally coupled to a lower portion. The upper portion may include an upper enclosure and house or partially contain a touch-sensitive display that depicts a graphical output of the electronic device. The lower portion may include a lower enclosure and may have a translucent layer that defines an exterior or upper surface of the electronic device along which the dynamic input region may be arranged. 
     In addition to the dynamic input region, the translucent layer may also have a keyboard region defined along the exterior or upper surface. The keyboard region may include one or more tactile switch assemblies coupled with the translucent layer that are configured to detect input at a key surface of a key cap or other input structure and generate a tactile response. The dynamic input region may be arranged on the translucent layer proximate the keyboard region (and/or adjoin or partially overlap) and define an active input area that forms a trackpad for the electronic device. The trackpad may be manipulated into a variety of configurations within the dynamic input region, as described herein, and be used to control a function of the electronic device that is distinct from the keypress. For example, the graphical output depicted at the display may be modified in a first manner in response to the keypress and in a second manner in response to input received within the active input area. 
     As described herein, the dynamic input region may be configured to depict a visual output of the trackpad at the translucent layer that is separate and distinct from the graphical output of the display. For example, as described above, the dynamic input region may visually emphasize the active input area, illuminate a boundary of a touch contact, and/or provide updateable information (battery level, wireless signal strength, and so on) corresponding to the electronic device that is separate and distinct from the graphical output depicted at the display. 
     In certain embodiments, the visual output of the dynamic input region may be visually perceptible when the upper portion and the lower portion are in a closed position. As described herein, the upper and lower portions may pivot relative to one another such that major surfaces of the upper portion and the lower portion are positioned proximate to one another or otherwise aligned to define a closed configuration of the electronic device. The dynamic input region may depict a visual output along a periphery of the major surface of the lower portion that may be at least partially visible between the closed upper and lower portions. For example, a light-emitting element may be configured to propagate light through the translucent layer and/or between a gap separating the closed upper and lower portions (which may extend along a direction substantially away from the enclosure). The light may be indicative of a status or other information relating to the electronic device, such as a power or battery depletion level. This may allow a user to receive updatable information from the electronic device even when the enclosure is closed. 
     It will be appreciated that while the foregoing describes the dynamic input region defined on a notebook computer enclosure, the dynamic input region may be defined on substantially any electronic device enclosure having a translucent enclosure or device body. Sample devices include a smart watch, stylus, other portable or wearable electronic device, portable media players, and so on. Broadly, the electronic device may be defined by any enclosure (at least a portion of which is translucent) having one or more openings that surround or contain a display and/or a button. In other embodiments, the electronic device may be a component or segment of a substantially mechanical structure, such as a wall of a building, a panel, dashboard, door, doorframe, or the like. For example, a wall of a building may be used to define the dynamic input region and control various functions of the building, such as climate controls, lighting, and so on. As such, the discussion of any electronic device is meant as illustrative only. 
     Reference will now be made to the accompanying drawings, which assist in illustrating various features of the present disclosure. The following description is presented for purposes of illustration and description. Furthermore, the description is not intended to limit the inventive aspects to the forms disclosed herein. Consequently, variations and modifications commensurate with the following teachings, and skill and knowledge of the relevant art, are within the scope of the present inventive aspects. 
       FIG. 1  A depicts an electronic device  104 , such as the electronic device generally discussed above and described in more detail below. The electronic device  104  may include a translucent layer that forms an external surface of an enclosure of the electronic device  104 . A dynamic input region or trackpad may be defined along the external surface of the enclosure and used to control a function of the electronic device  104 . 
     In a non-limiting example, as shown in  FIG. 1A , the electronic device  104  may include an upper portion  109   a  and a lower portion  109   b . The lower portion  109   b  may be pivotally coupled with the upper portion  109   a , for example, about a hinge  110 , described below. The upper portion  109   a  and the lower portion  109   b  may cooperate to form or define a shape of notebook computer. Various components and assemblies of the electronic device  104  may be positioned within one or both of the upper portion  109   a  or lower portion  109   b  to facilitate the operation of the electronic device  104 . 
     An exterior surface of the electronic device  104  may be defined by an enclosure  108 . For example, the enclosure  108  may define sidewalls, and top and bottom surfaces of the electronic device  104  that enclose or encompass internal components of the electronic device  104 , including various electrical and structural components described herein. The enclosure  108  may include multiple layers or assemblies that be positioned within one or both of the upper portion  109   a  and/or the lower portion  109   b.    
     For purposes of illustration,  FIG. 1A  shows the enclosure  108  as having an upper enclosure  108   a  and a lower enclosure  108   b . The upper enclosure  108   a  may be positioned or arranged as a component of the upper portion  109   a  of the electronic device  104  and the lower enclosure  108   b  may be positioned or arranged as a component of the lower portion  109   b  of the electronic device. The upper enclosure  108   a  may be pivotally coupled with the lower enclosure  108   b  about a hinge  110 . The hinge  110  may allow the upper enclosure  108   a  and the lower enclosure  108   b  to pivot relative to one another and define an open configuration (as shown in  FIG. 1A ) and a closed configuration (as described with respect to  FIGS. 8A and 8B ) of the electronic device  104 . In the closed configuration, major surfaces of the upper enclosure  108   a  and the lower enclosure  108   b  may be positioned substantially parallel with one another. 
     The electronic device  104  may include a touch-sensitive display  114  at least partially positioned within the enclosure  108 . For example, the upper enclosure  108   a  may define an opening  112  and the touch-sensitive display  114  may be at least partially positioned within the opening  112 . The touch-sensitive display  114  may be configured to depict a graphical output of the electronic device  104 . The graphical output depicted on the touch-sensitive display  114  may be responsive to various types of detected input, described herein, including a touch input, force input, and/or a proximity input detected at a keyboard or keyboard region of the electronic device  104  and/or a dynamic contact region of the trackpad. 
     The enclosure  108  may have, or be partially formed from, a translucent layer. For example, as shown in  FIG. 1A , an exterior or upper surface of the lower enclosure  108   b  of the enclosure  108  may be formed from a translucent layer  116 . In certain embodiments, the translucent layer  116  may be a light transmissible layer that allows light to propagate therethrough. In some cases, the translucent layer  116  may include an internal reflection region and define a light guide that allows light to travel along a length of the translucent layer. In other cases, the translucent layer  116  may allow light to propagate between an exterior and interior of the electronic device  104  substantially unobstructed. The translucent layer  116  may be formed from a ceramic (e.g., sapphire, conundrum), glass, plastic, synthetic, composite, or other appropriate translucent, transparent, partially transparent, or otherwise light-transmissible structure configured to form a surface of a device enclosure. While the translucent layer  116  is shown forming substantially an entire exterior or upper surface of the lower enclosure  108   b , it will be appreciated that that translucent layer  116  may be used to define a smaller or larger exterior surface (or regions thereof) of the enclosure  108 , including embodiments where the translucent layer  116  forms an exterior surface of both the upper enclosure  108   a  and the lower enclosure  108   b.    
     In the embodiment of  FIG. 1A , the translucent layer  116  may define or form a keyboard region  118 . The keyboard region  118  may be a region of the electronic device  104  having one or more mechanical keys, buttons, switches, or other input surfaces that may be used to provide input to the electronic device  104 . In some embodiments, the keyboard region  118  includes a virtual keyboard that includes an array of key regions, each region having a key surface and a switch or sensing element for detecting a keystroke (e.g., a touch or press). 
     In the embodiment of  FIG. 1A , the electronic device  104  is shown as having a keyboard  120  arranged within the keyboard region  118  and coupled with and/or along the translucent layer  116 . The keyboard  120  may be a mechanical keyboard (e.g., having mechanically-actuated keys) and include a set of illuminable key caps  122 . Each of the set of illuminable key caps  122  may have a key surface and an illuminable portion at which light from a light-emitting element may visually emphasize a location, size, and/or function of a key. The set of illuminable key caps  122  may be substantially surrounded by, and at least partially protrude from, the translucent layer  116 , for example, as may be the case where the keyboard  120  is positioned within an opening defined in the translucent layer  116 . In other cases, as shown in  FIG. 1A , the set of illuminable key caps  122  may be positioned above the translucent layer  116 , for example, as may be the case where the keyboard  120  is a separate layer positioned over the translucent layer. The set of illuminable key caps  122  may be configured to receive a keypress (e.g., a touch and/or force input). The keypress may depress a particular one of the set of illuminable key caps  122  that may control the electronic device  104 . To facilitate the foregoing, the keyboard  120  may include various support structures (butterfly mechanisms, scissor mechanisms, and so forth), tactile elements (collapsible dome), switch elements (sensing membrane), and/or any other appropriate component configured to detect a keypress, described in greater detail below with respect to  FIG. 1B . 
     An exterior or upper surface of the translucent layer  116  adjacent to (or partially overlapping) the keyboard region  118  may resemble an exterior surface of a device enclosure free of markings and/or having a substantially uniform appearance. Despite appearances, in an activated state, the electronic device  104  may define a dynamic input region  128  along the exterior surface of the translucent layer  116 . The dynamic input region  128  may be a region of the translucent layer  116  configured to receive an input, including a touch input, a force input, and/or a proximity input that is used to control a function of the electronic device  104 . For example, the dynamic input region  128  may be a region of the translucent layer  116  coupled with or positioned along a sensing element, described herein, that may detect input along the exterior surface of the enclosure  108 . 
     The translucent layer  116  may be illuminated to reveal the input functionality of the dynamic input region  128 . For example, as described in greater detail below, in a side-illuminated embodiment, the translucent layer  116  may be a light guide configured to channel or redirect light along a length of the enclosure  108 . The translucent layer  116  may include internal reflective properties or otherwise have an internal reflection region that allows light optically coupled with the translucent layer  116  to propagate within the translucent layer  116  without substantially escaping. One or more light-extraction features, such as a textured region, formed into the translucent layer  116  may expel light from the translucent layer  116  and reveal the input functionality of the dynamic input region  128 . 
     Additionally or alternatively, in a bottom-illuminated embodiment, the dynamic input region  128  may be a concealable or hidden input region of the electronic device  104 . For example, a light control layer having a group of illuminable features may be positioned along an underside surface of the translucent layer  116 . The light control layer may generally conceal an interior of the enclosure  108  and the indicators may be visually imperceptible or invisible when not illuminated. When activated, the electronic device  104  reveals the dynamic input region  128  by propagating light through the group of illuminable features to display a boundary or an active input area, symbol, glyph, marking, or other visual output of the dynamic input region  128 . An input assembly, sensing element or the like, including various haptic elements or structures, may be positioned below the dynamic input region  128  and configured to trigger a switch event and/or deliver a haptic output in response to an input received along the dynamic input region  128 . 
     As shown in  FIG. 1A , the keyboard region  118  and keyboard  120  are positioned adjacent the dynamic input region  128 . More specifically, the keyboard region  118  and keyboard  120  are partially surrounded by the dynamic input region  128 . In some embodiments, the dynamic input region  128  is positioned along a side of the keyboard region  118 . In embodiments where the keyboard  120  is a virtual keyboard, the keyboard may be integrated with the translucent layer  116  and the dynamic input region  128  may partially surround and/or be integrated with the keyboard  120 . 
     The electronic device  104  may include various other input/output components that support one or more functions of the electronic device  104 . For purposes of illustration,  FIG. 1A  depicts the electronic device as including the touch-sensitive display  114  and keyboard  120 . The electronic device  104  may also include a processing unit (optionally including executable logic and/or sets of computer readable instructions) and/or other hardware or software for use in facilitating the operation described herein (e.g., processing unit  1208  of  FIG. 12 ). It should be noted that the electronic device  104  may also include various other components, such as one or more ports (e.g., a charging port, a data transfer port, or the like), communications elements, additional input/output members (including additional buttons), and so on. It will be appreciated that the electronic device  104  may be any suitable device having a concealable or hidden input region, as described herein, including data-entry devices, word-processing devices, desktop computers, notebook computers, smart phones, tablets, portable media players, or the like. Other examples of electronic devices may include health monitoring devices, digital cameras, printers, scanners, security systems or devices, or electronics for automobiles, buildings, or other structures, among other electronic devices. As such, the discussion of any electronic device, such as electronic device  104 , is meant as an illustration only. 
       FIG. 1B  depicts a cross-sectional view of the keyboard  120  of  FIG. 1A , taken along line A-A of  FIG. 1A . As illustrated, the keyboard  120  includes a tactile element  132  (e.g., a collapsible dome or other deformable structure), a key cap  134 , a substrate  136  (e.g., a printed circuit board, having one or more sensor or electrical contacts), and a support structure  138 . The substrate  136  may define a base or base portion of the keyboard  120 . In some cases, the substrate  136  may be formed from and/or defined by a portion of the translucent layer  116 , described with respect to  FIG. 1A . For example, the key cap  134  and tactile element  132  may be substantially positioned along an exterior surface of the translucent layer  116  and a sensing element disposed partially within or along the translucent layer  116  may detect a keypress received at the key cap  134 . In other cases, the substrate  136  may be a printed circuit board, electrical substrate, or the like arranged within an interior of the electronic device  104  defined by the enclosure  108 . For example, the key cap  134  and the tactile element  132  may be at least partially positioned within an opening defined by the translucent layer  116  and the substrate  136  may detect a keypress received at the key cap  134  as it is advanced inward toward the interior of the enclosure  108 . 
     To facilitate the foregoing, the substrate may include switch element  140 . The switch element  140  may be a contact-based and/or non-contact-based sensor that detects a keypress received at the key cap  134 . For example, the switch element  140  may define one or more electrical traces that may trigger a switch event in response to a contact from the tactile element  132  or other component of the keyboard  120  when the key cap  134  (having a key surface) is depressed. In other cases, the switch element  140  may be, or form a component of, a capacitive, magnetic, and/or optical based sensor configured to detect movements of the key cap  134  caused by the keypress and trigger a corresponding switch event. As shown in the embodiment of  FIG. 1B , the switch element  140  is positioned at least partially within the substrate  136 ; however, this is not required. In other cases, the switch element  140  may be positioned along an interior and/or exterior surface of the substrate  136  (where the substrate  136  is a portion of the translucent layer  116 ). The switch element  140  may also be separated from the substrate  136  in some embodiments. 
     The substrate  136  may also be configured to facilitate illumination of the key cap  134 . For example, the substrate  136  may be a portion of the translucent layer  116  or otherwise be formed or constructed from a translucent material that allows light to propagate therethrough. As such, a light-emitting element of the electronic device  104  (not shown in  FIG. 1B ) may illuminate some or all of the substrate  136 . The substrate  136  may subsequently direct the received light toward the key cap  134  and illuminate an illumination symbol or glyph. 
     The tactile element  132  may be any appropriate structure that delivers a tactile effect to the key cap  134  in response to a keypress. In the embodiment depicted in  FIG. 1B , the tactile element  132  is a collapsible dome. The collapsible dome may buckle in response to a depress of the key cap  134 . It will be appreciated, however, that the tactile element  132  may take other shapes and forms, including being formed from a compliant material or compliant overlay having various geometric features and material properties (pockets, protrusions, densities, and so on) that is positioned over the translucent layer  116 . In this regard, the tactile element  132  may be configured to deliver a tactile sensation corresponding to the operation of a mechanical key, notwithstanding the configuration of other components or sub-assemblies of the keyboard  120 . 
     In this regard, in certain embodiments, the tactile element  132  may be formed from any appropriate material (e.g., including metal, rubber, or the like) that exhibits sufficiently elastic characteristics. For example, the tactile element  132  may be sufficiently elastic or resilient such that it does not permanently deform from applied force (e.g., the tactile element  132  may substantially return to an original or undeformed shape after the force ceases). The key cap  134  may deform the tactile element  132  upon the depression of the key cap  134 . In turn, the tactile element  132  may return to an undeformed shape when the key cap  134  returns to a neutral or undepressed condition. The tactile element  132  may not be limited to the above example materials, and may also include any other appropriate materials consistent with the various embodiments presented herein, including silicone, plastic or other flexible and resilient materials. 
     As shown in  FIG. 1B , the support structure  138  may support the key cap  134  above the substrate  136 . The support structure  138  may guide movement of the key cap  134  toward the tactile element  132  and the substrate  136  during a keypress. The support structure  138  may be an optional component of the keyboard  120 . For example, in some embodiments, the key cap  134  may be supported above the substrate  136  by the tactile element  132  and/or the key cap  134  may be positioned along the substrate  136 . As such, while the support structure  138  may be a butterfly mechanism or scissor mechanism, other structures are contemplated that support the key cap  134  and guide movement of the key cap  134  as it is depressed. 
     As described above with respect to  FIG. 1 , the keyboard  120  may be coupled with and/or positioned along or partially within the keyboard region  118  defined on the translucent layer  116 . The dynamic input region  128  may be defined along a region of the translucent layer  116  adjacent or proximate to (and/or partially overlapping) the keyboard region  118 . Accordingly, the keyboard region  118  and the dynamic input region  128  may be defined along a common exterior surface of the enclosure  108 . The electronic device  104  may illuminate some or all of the dynamic input region  128  on the translucent layer  116  to reveal the input functionality of the enclosure  108 . The dynamic input region  128  may also be illuminated to produce various visual outputs on the translucent layer  116 . 
     With reference to  FIGS. 1C and 1D , particular embodiments, the electronic device  104  may illuminate an active input area within the dynamic input region  128 . The active input area may correspond to a particular area or portion of the dynamic input region  128  configured to control a function of the electronic device  104  in response to an input. For example, while the entire dynamic input region  128  may be configured to detect input, a specified area or portion of the dynamic input region  128  may define an active input area that is used to control the electronic device  104  in response to detected input; other areas or portions of the dynamic input region  128  may be temporarily unresponsive to input. This may allow the active input area to be customizable within the dynamic input region  128  based on user preferences, such as arranging the active input area in various positions and sizes within the dynamic input region  128 . In this regard,  FIGS. 1C and 1D  depict the translucent layer  116  having the dynamic input region  128  in various states of illumination that may define the active input area. 
       FIG. 1C  depicts the translucent layer  116  having the dynamic input region  128  defined along an exterior surface. As shown in  FIG. 1C , the dynamic input region  128  may include an active input area  150 , such as the active input areas generally described above and described in great detail below. The active input area  150  may be a specified area or portion of the dynamic input region  128  that is configured to detect an input and control a function of the electronic device  104  (e.g., such as manipulate a graphical output of the touch-sensitive display  114  and/or otherwise provide input to the electronic device  104 , including trackpad-type input). The electronic device  104  may include various light-emitting elements configured to illuminate the active input area  150  on the translucent layer  116 . The light-emitting elements may therefore be used to indicate to the user the presence of input functionality on the translucent layer  116  and, specifically, the location or boundary within the dynamic input region  128  configured to receive input and control a function of the electronic device  104 . One or more sensing elements of the electronic device  104 , described herein, may be configured to detect input received within the active input area  150 . 
     The active input area  150  may be manipulated within the dynamic input region  128 . As sample possibilities, a size, shape, position, or the like of the active input area  150  may be manipulated or otherwise changed or updated within the dynamic input region  128 . This may occur in response to an input received within the dynamic input region  128  (e.g., such as a gesture or other input) and/or in response to a signal from a processing unit and/or other component or assembly of the electronic device  104 . To facilitate the foregoing, the light-emitting elements of the electronic device  104  may be selectively operable to illuminate different (or overlapping) areas or portions of the translucent layer  116  to define different boundaries of the active input area  150 . Analogously, the sensing elements of the electronic device  104  may also be selectively operable to detect input received within a new or updated boundary of the active input area  150 . 
     With reference to  FIG. 1D , the active input area  150  is shown illuminated within the dynamic input region  128  having a distinct size and position as that of the active input area  150  shown and described with respect to  FIG. 1C . For example, the active input area  150  depicted in  FIG. 1D  may be illuminated in a lower right corner of the dynamic input region  128  and encompass a larger portion of the dynamic input region  128  than the active input area of the embodiment of  FIG. 1C . For example, the light-emitting elements of the electronic device  104  may illuminate the translucent layer  116  in a different or predetermined manner and cause an updated or new boundary of the active input area  150  to be illuminated on the translucent layer  116  corresponding to the manipulated size and location or other manipulated characteristic of the active input area  150 . 
     The resized and repositioned active input area  150  may accommodate a user-specified preference. For example, where the active input area  150  defines a trackpad of the electronic device  104 , a user may desire to resize and/or reposition the trackpad along the device enclosure to facilitate use of the electronic device  104 , including various applications, programs or functions performed or depicted on the electronic device  104 . The resizing, repositioning, or other manipulation of the active input area  150  may occur in response to, for example, a gesture or other user input received along the dynamic input region  128 , the keyboard region  118 , or other input device or structure of the electronic device  104 , including the touch-sensitive display  114 . Once resized, repositioned, or otherwise changed, the sensing elements of the electronic device  104  may be responsive to detect input received within the updated boundary of the active input area  150 . In this regard, the electronic device  104  may be configured to distinguish between input received along the dynamic input region  128  that is within and/or outside of the active input area  150 . This may allow the electronic device  104  to be controlled by input received within the illuminated boundary of the active input area; however, in other cases it may be desirable to detect input received outside of the illuminated boundary as well (e.g., as described in greater detail below with respect to  FIG. 6B ). 
     As described herein, the electronic device  104  may be configured to depict various visual outputs within the dynamic input region  128 . Broadly, visual outputs of the dynamic input region  128  may be substantially any optical or visual effect depicted on the translucent layer  116 . In some embodiments, visual outputs of the dynamic input region  128  may visually emphasize a boundary or other feature of an active input region (e.g., as described in greater detail below with respect to  FIGS. 3A-3C ). Visual outputs of the dynamic input region  128  may also be used to indicate or confirm an input received along the dynamic input region  128 , such as a magnitude to position of an input (e.g., as described in greater detail below with respect to  FIGS. 4A-5C ), or otherwise be used to optically enhance the dynamic input region  128  and/or the active input area  150 . 
     Visual outputs of the dynamic input region  128  may also be used to convey information relating to the electronic device  104 . In this regard, the dynamic input region  128  may be configured to depict output of the electronic device  104  along the translucent layer that defines an exterior surface of the enclosure  108 . With reference to  FIG. 1E , for example, the translucent layer  116  is shown as having a visual output  154  illuminated within the dynamic input region  128 . The visual output  154  may be a symbol representative of a battery depletion level (battery charge) of the electronic device  104 . As such, the visual output  154  may be updateable or dynamic; as the battery level rises or falls, the visual output  154  may correspondingly change. It will be appreciated that the symbol representative of a battery depletion level is shown in  FIG. 1E  for purposes of illustration only. As described in greater detail below, visual outputs may be substantially any appropriate symbol, indicia, graphics or the like including updateable symbols, such as symbols representative of a wireless signal strength, a location of a wireless signal, a notification (including text and/or email-based notifications), and so on. Further, visual outputs may also be symbols that indicate the location or particular components or assemblies of the electronic device  104 , such as an internal charging assembly (inductive coils), among other possibilities. 
       FIGS. 2A-2F  depict cross-sectional views of various embodiments of the dynamic input region  128  of  FIG. 1A , taken along line B-B of  FIG. 1A . The dynamic input region  128  may be defined along the translucent layer  116  that forms an exterior surface  119   a  of the electronic device  104 . Broadly, the translucent layer  116  may be illuminated from the side (“side-illuminated” embodiment) and/or from below (“bottom-illuminated” embodiment). In the side-illuminated embodiment, the translucent layer  116  may be illuminated to define a specific visual output (e.g., a virtual trackpad). The side illuminated embodiment may also include multiple layers that, together, can be used to create a dynamic visual output. In the bottom-illuminated embodiment, an array of light-emitting elements may illuminate a configurable or customizable boundary of a virtual trackpad and/or other visual input. In this regard, the dynamic input region  128  may be associated with a region of the electronic device  104  having various light-emitting elements, sensing elements, haptic structures, and/or other components or assemblies that are configured to define an active input area  150 , and the translucent layer  116  and detect an input. The embodiments of the dynamic input region  128  depicted in  FIGS. 2A-2F  are shown and described as sample implementations of the electronic device  104 ; it will be appreciated that other implementations are possible and contemplated within the scope of the present disclosure. 
     With reference to  FIG. 2A , a side-illuminated embodiment is shown. In particular, the dynamic input region  128  is shown in an embodiment in which the translucent layer  116  defines a light guide along the exterior surface  119   a . The translucent layer  116  may be configured to channel or redirect light along a length of the exterior surface  119   a  and illuminate the active input area  150 . To facilitate the foregoing, the translucent layer  116  may include both an internal reflection region  117   a  (configured to propagate light within and along the translucent layer  116 ) and light-extraction features  117   b  (configured to expel or extract light from the translucent layer  116 ). The light-extraction features  117   b  may be formed into the translucent layer  116  and/or partially be surrounded by the internal reflection region  117   a . In some cases, the internal reflection region  117   a  and the light-extraction features  117   b  may form a substantially continuous surface of the electronic device  104 . The light-extraction features  117   b  may obstruct or redirect light propagating through the translucent layer  116  such that the light exits the translucent layer  116  and illuminates the active input area  150 . For example, the light-extraction features  117   b  and the internal reflection region  117   a  may have different indices of refraction that cause light to exit the translucent layer  116  when light traverses a boundary between the light-extraction features  117   b  and the internal reflection region  117   a . Additionally or alternatively, the light-extraction features  117   b  may be defined by various physical and/or geometric features that are distinct from the internal reflection region  117   a , including geometric features of the light-extraction features  117   b  that may protrude from the exterior surface  119   a.    
     The translucent layer  116  may be optically coupled with a light-emitting element  160 , as shown in  FIG. 2A . The light-emitting element  160  may be optically coupled along a side or end of the translucent layer  116 ; however, other configurations are possible. The translucent layer  116  may receive light from the light-emitting element  160  and channel the received light toward the light-extraction features  117   b  to define the active input area  150 . As shown in  FIG. 2A , the light-emitting element  160  may emit light substantially along light path L 1 , which may extend into a body or thickness of the translucent layer  116  at the internal reflection region  117   a . The internal reflection region  117   a  may be configured to substantially prevent light from escaping from the translucent layer  116  and direct the light along light path L 1  toward the light-extraction features  117   b . The light-extraction features  117   b  may receive the light along light path L 1  and redirect the received light toward the exterior surface  119   a  and illuminate the active input area  150 , for example, substantially along light path L 2 . The light path L 2  may thus represent a redirected path of light that initially emanates from the light-emitting element  160 . By using the translucent layer  116  as a light guide, the light-emitting element  160  may thus be positioned away or offset from the active input area  150  (such as along the side of the translucent layer  116 ), which may allow components or assemblies of the dynamic input region  128  to be more tightly spaced or otherwise assembled in a manner that enhances the adaptability of the electronic device  104 . 
     Various sensing elements, haptic structures, and/or other components may be positioned below the translucent layer  116 . For example, as depicted in  FIG. 2A , the electronic device  104  may include a sensing element  164  and a haptic structure  168  below the translucent layer  116 . The sensing element  164  and the haptic structure  168  may be positioned along the translucent layer  116  corresponding to a location of the dynamic input region  128  on the exterior surface of the electronic device  104 . 
     The sensing element  164  may be any appropriate component or assembly that detects a touch input, force input, and/or proximity input received within the active input area  150 , or more generally along the dynamic input region  128  and/or other regions of the translucent layer  116 . In this regard, the sensing element  164  may be a wide variety of components, sensors, assemblies, or the like that are positioned below and/or coupled with the translucent layer  116 . In one embodiment, the sensing element  164  may be a non-contact-based sensing element that detects input received along the exterior surface  119   a  of the translucent layer  116 . This may include a capacitive or magnetic-based sensor that is configured to detect a proximity of a user to the translucent layer  116 , including a contact between the user and the exterior surface  119   a . The non-contact-based sensing element may also detect localized or generalized bending or deflection of the translucent layer  116  which may be used to determine a corresponding force input associated with the deflection. Additionally or alternatively, the sensing element  164  may be a contact-based sensor, such as a tactile dome switch, that detects a force input on the external surface in response to localized or generalized bending or deflection of the translucent layer  116 . 
     The haptic structure  168 , may be any appropriate structure or component that produces a haptic or tactile output. In particular, the haptic structure  168  may be any appropriate component that delivers a movement or vibration along the external surface defined by the translucent layer  116  that is perceptible to human touch. The electronic device  104  may use the haptic structure  168  to deliver the haptic or tactile output in response to an input received within the active input area  150 , or more generally along the dynamic input region  128 . For example, the haptic structure  168  may be a mechanical structure, such as a collapsible dome, spring, or the like that produces movement or vibration in response to a force input received along the dynamic input region  128 . In other cases, the haptic structure  168  may be an electrically actuated assembly that delivers a haptic or tactile output in response to a detection of a touch and/or force input by the sensing element  164 . For example, the haptic structure  168  may be an electromagnet, electro active polymer or piezoelectric (EAP) stack, or the like. In an embodiment, the haptic structure  168  may be at least partially included within, or directly coupled to, the sensing element  164 , for example, which may be the case where the haptic structure  168  is a collapsible dome of a tactile dome switch used to detect a force input received within the active input area  150 . 
     With reference to  FIG. 2B , a bottom-illuminated embodiment is shown. In particular, the dynamic input region  128  is shown in an embodiment in which the active input area  150  is defined, at least in part, by the illumination of a group of illuminable features positioned below the translucent layer  116 . The group of illuminable features may be positioned within a light control layer that extends along an underside surface  119   b  of the translucent layer  116 . The light control layer may substantially block the passage of light. The group of illuminable features, which may be visually imperceptible along the exterior surface  119   a , may allow light through the light control layer, thereby causing the active input area  150  to be illuminated. The indicators may also be illuminated to depict various graphical effects on the translucent layer  116 , as described herein. 
     As shown in the embodiment of  FIG. 2B , electronic device  104  may include a light control layer  170 . The light control layer  170  may be positioned along and/or be coupled with the underside surface  119   b  of the translucent layer  116 . The light control layer  170  may include a group of illuminable features  172 . Light may generally pass through the light control layer  170  at the group of illuminable features  172 . In this regard, the group of illuminable features  172  may be illuminated from within the enclosure  108  to define a boundary of the active input area  150  and/or other graphical effect within the dynamic input region  128 . In some cases, distinct subsets of the group of illuminable features may be selectively illuminated in order to define different or updateable visible boundaries of the active input area  150  and/or other dynamic or updateable visual outputs within the dynamic input region  128 . 
     In a particular embodiment, the light control layer  170  may be an ink, coating, resin, or other structure that blocks that passage of light and the group of illuminable features  172  may be a group of microperforations or holes extending through the light control layer  170 . For example, the light control layer  170  may be formed directly on the underside surface  119   b , for example, through a printing, deposition, sputtering, platting, or other appropriate process. In other cases, the light control layer  170  may be a separate substrate, film, or other layer applied to the underside surface  119   b  or on an intermediate (PET) layer connected to the underside surface  119   b , described below. The group of microperforations may be openings, holes, through portions, cuts, grooves, recesses, or other features that extend through a complete thickness of the light control layer  170 . In this regard, the group of microperforations may allow light to travel through the light control layer  170  and subsequently through the translucent layer  116 . 
     At the exterior surface  119   a , the group of microperforations may be substantially visually imperceptible when not illuminated. For example, the group of microperforations may have a size, shape, or other characteristic that renders the group of microperforations invisible or not visually perceptible to the unaided human eye. In one embodiment, the group of microperforations may have a width or other cross-dimension within a range of 30 microns to 70 microns. For example, the group of microperforations may be defined by a pattern of circles that each have a diameter within a range of 30 microns to 70 microns. The group of microperforations may be arranged across the light control layer  170  so that each perforation is separated by a distance within a range of 80 microns to 500 microns. For example, where each microperforation is defined by a circle, each circle may be separated across the light control layer  170  by a distance within a range of 80 microns to 500 microns. It will be appreciated that other dimensions and geometries are contemplated and described in greater detail below, including configurations in which a width of each microperforation is less than 30 microns or greater than 70 microns and where the separation distance is less than 80 microns or greater than 500 microns. Further, each microperforation need not have identical or uniform widths or separations; in some cases, various subsets of the group of microperforations may have distinct widths or separations, which may be used to produce a desired optical effect, among other considerations. 
     The group of microperforations may define a boundary, for example, of the active input area  150 . As such, when illuminated, the input functionality on the translucent layer  116  may be revealed. The group of microperforations may also define various other symbols, glyphs, indicia, and/or other visual outputs at the dynamic input region  128 . In other cases, the group of microperforations may define an array or a grid (such as a dot matrix) along the light control layer  170 . Subsets of the group of microperforations may be illuminated to illuminate various different boundaries of the active input area  150 . For example, as described in greater detail below with respect to  FIG. 2D , a first subset of the group of microperforations may be illuminated to define a first boundary of the active input area  150  and a second subset of the group of microperforations may be illuminated to define a second boundary of the active input area  150 . 
     In other embodiments, the light control layer  170  may be a polarizing layer and/or component or assembly configured to control the passage of light through the group of illuminable features. For example, the group of illuminable features  172  may include individually selectable windows or regions, which may allow light to propagate therethrough in response to a signal (e.g., which may be controlled by a processing unit of the electronic device  104 ). In this regard, the light control layer  170  may include various polarizing filters that may only allow light to pass through an indicator which exhibits a certain frequency, polarity, or other property. A liquid crystal element or other appropriate structure may be arranged within the group of illuminable features  172  and used to rotate or otherwise alter the received light such that it may pass through the indicator and associated polarizing filter. Individual liquid crystal elements may be individually actuated such that light may pass through selective ones of the group of illuminable features  172 . This may allow the dynamic input region  128  to be illuminated with various customizable and updateable visual outputs in addition to illuminating the active input area  150  in various locations and configurations within the dynamic input region  128 . 
     To facilitate the foregoing, the light-emitting element  160  may be positioned below the light control layer  170  and illuminate the group of illuminable features  172 . In the embodiment of  FIG. 2B , the light-emitting element  160  may be a backlight defined by one or more light-emitting diodes. Other light-emitting elements are contemplated, however, including embodiments where the light-emitting element  160  is, or forms a component of, a micro-LED, light guide, liquid crystal display (LCD), organic light-emitting diode (OLED), fluorescent light, and/or other light-emitting elements or structures (e.g., as described in greater detail below with respect to  FIG. 2D ). The light-emitting element  160  may generally be emitting light along light path L 3  shown in  FIG. 2B . The light path L 3  may correspond to a boundary of the active input area  150  and/or a visual output depicted within the dynamic input region  128 . As such, the light path L 3  extends through one or more of the group of illuminable features  172  and the translucent layer  116  in order to illuminate the exterior surface  119   a.    
     As shown in  FIG. 2B , the external surface  119   a  may be defined along a textured region  115  of the translucent layer  116 . The textured region  115  may be a region of the translucent layer having distinct optical properties that may facilitate illumination of the active input area  150 . For example, the textured region  115  may be defined by a series of geometric features, including dimples, bumps, discontinuities, and so on that may diffuse or condition light that propagates through the translucent layer  116 . In other embodiments, other shapes and configurations of the textured region  115  may be possible, including configurations where the textured region  115  is an internal region of the translucent layer  116  and the external surface  119   a  exhibits a substantially smooth contour. 
     It will be appreciated that while the light path L 3  is shown extending through a particular one of the group of illuminable features  172 , the light path L 3  may extend through substantially any (or all) of the group of illuminable features  172 . This may allow the dynamic input region  128  to define the active input area  150  at various positions along the exterior surface  119   a  of the translucent layer  116 . For example, the light-emitting element  160  may substantially illuminate the entire light control layer  170 , and the group of illuminable features  172  may be selectively actuated such that light propagates through particular ones of the group of illuminable features  172  and defines a desired symbol or visual output on the exterior surface  119   a  of the translucent layer  116 . In other embodiments, the active input area  150  and/or various visual outputs may be defined by the group of illuminable features  172 , for example, as may be the case when the group of illuminable features  172  are microperforations and the light-emitting element is, or forms a component of, an LED backlight. 
     The light path L 3  may also traverse multiple other translucent layers. For example, the electronic device  104  may include an optical diffuser  174 . The optical diffuser  174  may be positioned between the light-emitting element  160  and the light control layer  170  such that the light path L 3  traverses the optical diffuser  174 . The optical diffuser  174  may, in some embodiments, spread or scatter light received from the light-emitting element  160 . This may allow the dynamic input region  128  to be illuminated with soft or diffuse light. This may be beneficial for generating various optical effects on the exterior surface  119   a  defined by the translucent layer  116 . For example, soft light may be preferred in various settings having low or dim ambient lighting conditions. 
     Further, as shown in the embodiment of  FIG. 2B , the electronic device  104  may optionally include one or more intermediate layers positioned along the light control layer  170 . For example, as shown in  FIG. 2B , the electronic device  104  may include intermediate layers  171   a ,  171   b . The intermediate layer  171   a  may be positioned between the translucent layer  116  and the light control layer  170 . The intermediate layer  171   b  may be positioned along the light control layer  170  opposite the first intermediate layer  171   a . The intermediate layers  171   a ,  171   b  may provide a moisture barrier or other transitional layer between one or more of the components of the electronic device  104 . The intermediate layers  171   a ,  171   b  may be translucent. This may allow light generated by the light-emitting element  160  (for example, such as that along light path L 3 ) to propagate through the group of illuminable features  172  and illuminate the active input area  150  on the translucent layer  116 . The intermediate layers  171   a ,  171   b  may be formed from, or include, polyethylene terephthalate (PET), silicon, glass sheet, ceramic sheet, or the like; however, other materials are possible, including plastics, synthetics, composites, and so on. 
     The sensing element  164  and the haptic structure  168 , described with respect to  FIG. 2A , are depicted in  FIG. 2B  positioned below the light-emitting element  160 . However, it will be appreciated that the sensing element  164  and the haptic structure  168  may be arranged within the dynamic input region  128  in any appropriate configuration. 
     With reference to  FIG. 2C , a side-illuminated embodiment is shown having multiple stacked layers that cooperate to produce a dynamic or configurable visual output. In particular, the dynamic input region  128  is shown in an embodiment in which the translucent layer  116 , described above with respect to  FIG. 2A , includes multiple distinct translucent layers. Each of the distinct translucent layers may define an individual light guide that is configured to channel light along a length of the exterior surface  119   a . This may allow the dynamic input region  128  to illuminate active input areas having distinct sizes, shapes, and other optical effects. 
     As shown in the embodiment of  FIG. 2C , the electronic device  104  includes a first translucent layer  116   a , a second translucent layer  116   b , and a third translucent layer  116   c . The first translucent layer  116   a  may define the exterior surface  119   a  and the third translucent layer  116   c  may define the underside surface  119   b . However, in other cases, the translucent layers  116   a - 116   c  may be positioned substantially within the device enclosure, and thus need not necessarily form the exterior surface  119   a . Each of the translucent layers  116   a - 116   c  may be vertically stacked relative to one another on the exterior surface  119   a ; however, in other embodiments, other configurations are possible, including configurations in which one or more of the translucent layers  116   a - 116   c  are separated from one another within the enclosure  108 . Each of the translucent layers  116   a - 116   c  may include light-extraction features configured to extract light and illuminate a corresponding active input area, as described below. 
     Each of the translucent layers  116   a - 116   c  may be coupled with a distinct light-emitting element and be used to illuminate distinct visible boundaries of an active input area within the dynamic input region  128 . For example, the electronic device  104  may include a light-emitting element  160   a  optically coupled along an end of the translucent layer  116   a . The light-emitting element  160   a  may be configured to emit light into a body or thickness of the translucent layer  116   a  such that light is propagated substantially along a light path L 1   a . The translucent layer  116   a  may include light-extraction features  121   a  that redirects light of light path L 1   a  toward the exterior surface  119   a . Further, the electronic device  104  may include a light-emitting element  160   b  optically coupled along an end of the translucent layer  116   b . The light-emitting element  160   b  may be configured to emit light into a body or thickness of the translucent layer  116   b  such that light is propagated substantially along a light path L 1   b . The translucent layer  116   b  may include light-extraction features  121   b  that redirects light of light path L 1   b  toward the exterior surface  119   a . And further, the electronic device  104  may include a light-emitting element  160   c  optically coupled along an end of the translucent layer  116   c . The light-emitting element  160   c  may be configured to emit light into a body of thickness of the translucent layer  116   c  such that light is propagated substantially along a light path L 1 C. The translucent layer  116   c  may include light-extraction features  121   c  that redirects light of light path L 1 C toward the exterior surface  119   a . It will be appreciated that the three distinct translucent layers are shown in  FIG. 2C  for purposes of illustration only. In other embodiments, more or fewer translucent layers may be used, as may be appropriate for a given application. 
     Broadly, each of the translucent layers  116   a - 116   c  may be used to illuminate the exterior surface  119   a  within the dynamic input region  128 . The illumination of the exterior surface  119   a  may correspond to distinct active input areas within the dynamic input region  128 . For example, when illuminated, the first translucent layer  116   a  may define a first active input area  150   a  on the exterior surface  119   a  using the light-extraction features  121   a , the second translucent layer  116   b  may define a second active input area  150   b  on the exterior surface  119   a  using the light-extraction features  121   b , and the third translucent layer  116   c  may define a third active input area  150   c  on the exterior surface  119   a  using the light-extraction features  121   c . The active input areas  150   a - 150   c  may correspond to a specified region or area of the dynamic input region  128  configured to receive an input and control a function of the electronic device  104 . In this regard, various sensing elements (not shown in  FIG. 2C ) may be configured to detect input within the respective ones of the active input areas  150   a - 150   c  when illuminated. As shown in  FIG. 2C , the active input areas  150   a - 150   c  may overlap one another. 
     Additionally or alternatively, the translucent layers  116   a - 116   c  may be used to produce various optical effects or visual outputs within the dynamic input region  128 . For example, multiple ones of the translucent layers  116   a - 116   c  may be illuminated concurrently or in a particular pattern or sequence in order to visually emphasize selective portions of an active input area or otherwise produce a visual output along the exterior surface  119   a . To illustrate, the light-emitting element  160   a  may be illuminated and define a boundary of the active input area  150   a  within the dynamic input region  128 . While the active input area  150   a  is illuminated, the light-emitting elements  160   b ,  160   c  may be subsequently illuminated. This may create various optical effects within the active input area  150   a , for example, such as illuminating a center or a periphery of the active input area  150   a  in distinct manners. For example, the active input area  150   a  may be illuminated more intensely (or with different colors) in a center portion as opposed to a periphery. In a center portion, the active input area  150   a  may be illuminated from light propagated by each of the translucent layers  116   a - 116   c , whereas the periphery of the active input area  150  may be illuminated by light from only the translucent layer  116   a  (defining a boundary of the active input area  150   a ). The translucent layers  116   a - 116   c  may also be illuminated in a sequence to show an active input area expanding or contracting within the dynamic input region  128  (e.g., as described in greater detail below with respect to  FIG. 3C ). 
     With reference to  FIG. 2D , a bottom-illuminated embodiment is shown. In particular, the dynamic input region  128  is shown in an embodiment in which a group of light-emitting elements is used to selectively illuminate the exterior surface  119   a  of the translucent layer  116 . This may allow the dynamic input region  128  to include a customizable or dynamic active input area illuminated on the exterior surface  119   a . The selective illumination of the exterior surface  119   a  may also be used to produce various visual outputs, described herein, including updateable or dynamic visual output of the electronic device  104 . 
     In this regard, the electronic device  104  may include a group of light-emitting elements  162 . The group of light-emitting elements  162  may be a matrix of LEDs or other structures having individually actuatable light sources. The group of light-emitting elements  162  may be used to illuminate particular ones of the group of illuminable features  172 , which, in turn, may illuminate the active input area  150  or visual output of the dynamic input region  128 . For example, a first subset of the group of light-emitting elements  162  may be used to illuminate a first subset of the group of illuminable features  172 . The first subset of the group of illuminable features  172 , when illuminated, may define a first visible boundary of the active input area  150  on the exterior surface  119   a . Further, a second subset of the group of light-emitting elements  162  may be used to illuminate a second subset of the group of illuminable features  172 . The second subset of the group of illuminable features  172 , when illuminated, may define a second visible boundary of the active input area  150  on the exterior surface  119   a . The particular area or portion of the exterior surface  119   a  that defines the active input area  150  within the dynamic input region  128  may therefore change, and the group of light-emitting elements  162  may visually represent this change to the user by illuminating the translucent layer  116  accordingly. The first and second visible boundaries need not be distinct or separate portions of the translucent layer  116 , however. In some cases, at least some of the illuminated indicators may be included in both the first and the second subsets of the group of illuminable features  172 . 
     With reference to  FIG. 2E , an embodiment is shown in which the translucent layer  116  is illuminated from both the side and the bottom. In particular, the dynamic input region  128  is shown in an embodiment in which the translucent layer  116  both defines a light guide and is selectively illuminated from within the enclosure  108 . In particular, substantially analogous to the embodiment described with respect to  FIG. 2A , the translucent layer  116  may include an internal reflection region  117   a  and light-extraction features  117   b . Light from the light-emitting element  160  may propagate along the light path L 1  through the internal reflection region  117   a  and toward the light-extraction features  117   b . At the light-extraction features  117   b , light may be redirected and expelled from the translucent layer  116 , substantially along light path L 2 . This may illuminate, for example, a boundary of the active input area  150 . 
     The group of light-emitting elements  162 , arranged below the translucent layer  116  and the light control layer  170 , may be configured to further illuminate the exterior surface  119   a . As described above with respect to  FIG. 2D , the group of light-emitting elements  162  may selectively illuminate particular ones of the group of illuminable features  172  in order to produce a visual effect or other visual output on the exterior surface  119   a . As shown in  FIG. 3 , for example, the group of light-emitting elements  162  may generally propagate light along light path L 3 , toward exterior surface  119   a.    
     The group of light-emitting elements  162  may augment the illumination of the active input area  150 , which may be defined by the illuminated light-extraction features  117   b . For example, the group of light-emitting elements  162  may be used to produce a visual output within the active input area  150  when the light-extraction features  117   b  is illuminated by the light-emitting element  160 . The visual output may correspond to a visual indication of a position or a magnitude of a force or touch input received within the active input area  150 . The visual output may also correspond to an output of the electronic device  104 , such as a symbol corresponding to a battery depletion level of the electronic device  104 . In other cases, the visual output may be illuminated within the dynamic input region  128  and outside of active input area  150 . This may be beneficial in order to illuminate a visual output of the electronic device  104  within the dynamic input region adjacent or otherwise proximate to the active input area  150  on the exterior surface  119   a . In other embodiments, other visual outputs are contemplated and described in greater detail below. 
     With reference to  FIG. 2F , the electronic device  104  is shown in a configuration in which visual outputs may be produced when the electronic device  104  is in a closed configuration. For example, the translucent layer  116  may be illuminated such that the dynamic input region  128  and/or the active input area  150  may be at least partially visually perceptible when the electronic device  104  is in a closed configuration, as described herein. This may allow a user to view an active input area and/or visual output of the dynamic input region  128  when the upper enclosure  108   a  and the lower enclosure  108   b  are positioned substantially parallel or aligned with one another or the electronic device  104  is otherwise in a standby, sleep, or low-power mode. Further, information may be conveyed to the user regarding a status of the electronic device  104  (e.g., such as a battery depletion level, a wireless signal, and so on), without the user opening the electronic device  104  or otherwise causing the electronic device  104  to enter a full power mode. 
     To facilitate the foregoing, a periphery of the exterior surface  119   a  may be illuminated. For example, the electronic device  104  may include the group of light-emitting elements  162  arranged below the exterior surface  119   a  and along a periphery of the translucent layer  116 . The group of light-emitting elements  162  may be a strip of LEDs or micro-LEDs that extend along a side of the enclosure  108 ; however, in other cases, other illumination structures are possible. The group of light-emitting elements  162  may be selectively controllable to propagate light along light paths L 4 A, L 5 , described herein. Additionally or alternatively, the periphery of the exterior surface  119   a  may be illuminated by a light source  160  positioned along a side of the translucent layer  116 . The light source  160  may be configured to propagate light along light path L 1 , through the translucent layer  116 , for example, substantially analogous to the light path L 1  described with response to  FIG. 2A . 
     In a particular embodiment, an optical diffuser  174  may be arranged within the enclosure  108  substantially along the group of light-emitting elements  162 . The group of light-emitting elements  162  may propagate through the optical diffuser  174  and toward the translucent layer  116 . The group of light-emitting elements  162  may selectively propagate light along multiple directions into the diffuser, such as along a light path L 4  and a light path L 5 , depicted in  FIG. 2F . Light path L 4  may extend along a direction substantially perpendicular to the exterior surface  119   a , whereas the light path L 5  may extend along a direction angled with respect to the exterior surface  119   a  and optionally couple with the translucent layer  116 . The distinct light paths L 4 , L 5  may allow a user to view information depicted within the dynamic input region  128  when the electronic device is in a closed configuration. For example, light may propagate along light path L 4  and into the gap  130 . In the gap  130 , light from light path L 4  may reflect or scatter, and produce light path L 6 , which may be visible when the electronic device  104  is in the closed configuration. Additionally or alternatively, light may propagate along light path L 5  and into the translucent layer  116 . Light from light path L 5  may internally reflect within the translucent layer  116  and produce light path L 7 , which may be visible when the electronic device  104  is in a closed configuration. Light may also be visible when the electronic device  104  is closed using various light-emitting elements (e.g., light-emitting element  160 ) arranged along an edge. For example, as shown in  FIG. 2F , the light-emitting element  160  may propagate light along light path L 8 , which may extend from an edge or periphery of the enclosure. 
     It will be appreciated that the various light path described herein are depicted for purposes of illustration only. Rather than suggest all the light travels exclusively along a particular light path, the illustrated light paths are depicted to be a representation of diffuse light. Accordingly, light may propagate from the light-emitting element  160  and/or group of light-emitting elements  162  along directions other than those shown by those depicted in the figures. 
     The electronic device  104  may optionally include an intermediate optical layer  176 . The intermediate optical layer  176  may be another optical diffuser configured to further diffuse or scatter light. This may help condition or otherwise soften light expelled from the exterior surface  119   a . The intermediate optical layer  176  may also be an optical filter or other layer that selectively transmits light at various different wavelengths. This may help illuminate the exterior surface  119   a  with a specified color, for example. 
     In one embodiment, light propagated along the light path L 4  may extend through the light control layer  170  and illuminate, for example, the active input area  150  within the dynamic input region  128 . Light propagated along the light path L 5  need not necessarily pass through the light control layer  170 . In some cases, the light propagated along the light path L 5  may extend angularly through the translucent layer  116  and away from the electronic device  104 . It will be appreciated that light from the group of light-emitting elements  162  may be configured to selectively propagate light along one or both of the light path L 4  and/or L 5 , as may be appropriate for a given configuration. 
     As shown in  FIG. 2F , the electronic device  104  may be a closed configuration. For example, the upper enclosure  108   a  and the lower enclosure  108   b  of the enclosure  108  may be positioned substantially parallel or otherwise aligned with one another. For example, the exterior surface  119   a  of the lower enclosure  108   b  and an exterior surface  129  of the upper enclosure  108   a  may be substantially parallel or otherwise aligned. In the closed configuration, the upper enclosure  108   a  and the lower enclosure  108   b  may be separated by a gap  130 . The gap  130  is depicted in  FIG. 2F  for purposes of illustration and is not necessarily shown according to scale. In some cases, the gap  130  may be substantially smaller when the electronic device  104  is in the closed configuration, such as having a length of several millimeters or several centimeters. 
     The group of light-emitting elements  162  may be configured to illuminate the active input area  150  and/or a visual output within the dynamic input region  128  in a manner that is visually perceptible when the electronic device  104  is in a closed configuration. In particular, at least a portion of the active input area  150  and/or visual output illuminated on the translucent layer  116  may be visible through the gap  130  and/or a side or end of the translucent layer. For example, light propagated along the light path L 4  may be at least partially visually perceptible to a user through the gap  130  (along light path L 6 ). Additionally or alternatively, light propagated along the light path L 5  may propagate through a side or end or the translucent layer  116  (along light path L 7 ) and thus may be visually perceptible to a user when the electronic device  104  is in a closed configuration. This may be beneficial in order to convey information to a user regarding a status of the electronic device  104 . As a non-limiting example, light propagated along one or both of the light paths L 4  and/or L 5  may correspond to a battery depletion level of the electronic device  104  (or other updateable or dynamic status of the electronic device  104 ). As such, the user may receive such information without needing to open the electronic device  104  and/or cause the electronic device  104  to enter a full power mode. 
       FIGS. 3A-7C  generally describe various embodiments in which the translucent layer  116  may be illuminated, and the corresponding functions of the dynamic input region  128  for the various depicted illumination conditions. As described herein, the translucent layer  116  may be illuminated within the dynamic input region  128  to define various active input areas used to control a function of the electronic device  104 . The translucent layer  116  may also be illuminated to depict a visual output within the dynamic input region  128 . The visual output may be substantially any visual effect produced on the translucent layer  116 . In some cases, the visual output may emphasize the active input area (including a boundary or portion of the active input area), a location of a touch contact, a path of travel of a touch contact, a manipulation of the active input area, a location of multiple distinct active input areas, and so on. The visual output, however, may not necessarily be associated with input or a request for input from the user. In some cases, the visual output may also be used to convey information relating to a status of the electronic device  104 , including a notification or other static and/or dynamic indicator. 
       FIGS. 3A-3C  show various visual outputs depicted within the dynamic input region  128  that may be used to visually emphasize the active input area  150 . For example, the visual outputs may illuminate or emphasize a boundary (including a boundary thickness) of the active input area, a gradient, edge fade or taper, or other characteristic. In some cases, the visual output may be used to modify or manipulate an overall (or localized) brightness or color of the active input area  150 . 
     With reference to  FIG. 3A , the dynamic input region  128  is shown with a visual output  181  illuminated on the translucent layer  116 . The visual output  181  may visually emphasize an inner periphery of the active input area  150 . For example, the inner periphery of the active input area  150  may be illuminated differently than a center region of the active input area. This may be used to create various visual effects within the dynamic input region  128 , such as modifying a gradient brightness or edge fade of the illuminated boundary of the active input area  150 . 
     With reference to  FIG. 3B , the dynamic input region  128  is shown with a visual output  182  illuminated on the translucent layer  116 . The visual output  182  may visually emphasize a boundary of the active input area  150 . For example, the visual output  182  may be a ring of various and user-customizable thicknesses that substantially surround the active input area  150 . 
     With reference to  FIG. 3C , the dynamic input region  128  is shown with a visual output  183   a , a visual output  183   b , and a visual output  183   c  optionally illuminated on the translucent layer  116 . The visual outputs  183   a - 183   c  may correspond to distinct illuminated boundaries of the active input area  150 . For example, various ones of the visual outputs  183   a - 183   c  may be illuminated concurrently or in a sequence to visually emphasize different areas that may be used to receive an input and control a function of the electronic device. Additionally or alternatively, the visual outputs  183   a - 183   c  may be illuminated in a sequence to show the active input area  150  expanding or contracting. For example, when the active input area  150  is initially defined or activated within the dynamic input region  128 , the visual output  183   c  may be illuminated, followed by the visual output  183   b , and subsequently the visual output  183   a . This may give the appearance of an expanding active input area. The sequence may be reversed when the active input area  150  is turned off or otherwise deactivated. In one embodiment, each of the visual outputs  183   a - 183   c  may correspond to distinct light guide panels of the electronic device (e.g., such as those described with respect to  FIG. 2C ). However, in other cases, the visual outputs  183   a - 183   c  may be produced by various different light-emitting elements and indicators, as may be appropriate for a given application. 
       FIGS. 4A-4C  show various visual outputs depicted within the dynamic input region  128  that may be used to visually emphasize an input received along the dynamic input region  128 . For example, the visual outputs may illuminate or emphasize a location or region of a touch input, force input, and/or proximity input. The visual outputs may also emphasize or be indicative of a magnitude or type of detected input. The visual output may thus provide a visual confirmation to the user that the electronic device  104  received the input from the user. The visual output may be depicted in response to input detected along the dynamic input region  128  and/or in response to a signal from a component or assembly of the electronic device  104  (e.g., a processing unit, antenna, and so on). 
     With reference to  FIG. 4A , the dynamic input region  128  is shown with a visual output  184   a  illuminated on the translucent layer  116 . The visual output  184   a  may visually emphasize a boundary of an input received within the active input area  150 . For example, the visual output  184   a  may be a boundary of a touch input, force input, and/or proximity input received within the active input area  150 . 
     With reference to  FIG. 4B , the dynamic input region is shown with a visual output  184   b  illuminated on the translucent layer  116 . The visual output  184   b  may visually emphasize a location or contact area of an input received within the active input area  150 . For example, the visual output  184   b  may be an illumination of a contact surface of a touch input, force input, and/or a proximity input. 
     With reference to  FIG. 4C , the dynamic input region is shown with a visual output  184   c  illuminated on the translucent layer  116 . The visual output  184   c  may visually emphasize the active input area in response to a received input. For example, the active input area  150  may be entirely illuminated (or illuminated in a different or distinct manner) in response to a touch input, force input, and/or proximity input received within the active input area  150 . This may be a momentary illumination or a flash, in some cases. 
       FIGS. 5A-5C  show various visual outputs depicted within the dynamic input region  128  that may be used to visually emphasize, broadly, recent activity or history of the dynamic input region  128 . For example, the visual output may illuminate a light trail indicative of a path of travel of a user input (such as a path of travel for a swipe across a trackpad). Additionally or alternatively, the visual output may be indicative of a manipulation of the active input area  150  within the dynamic input region  128  (such as a resizing or repositioning of the active input area  150 ). 
     The visual output may be depicted on the dynamic input region  128  in response to a gesture. The gesture may include a user motion pattern, signs, finger or hand positions, or the like that are performed relative to the dynamic input region  128 . The gesture may be used to manipulate the active input area  150  along the dynamic input region  128 , and the visual output may depict the manipulation accordingly. 
     With reference to  FIG. 5A , the dynamic input region  128  is shown with a visual output  185  illuminated on the translucent layer  116 . The visual output  185  may visually emphasize a location and path of travel (recent movements) of an input received within the dynamic input region  128 . In a sample embodiment, as shown in  FIG. 5A , the visual output may include an input symbol  185   a  and a light trail  185   b . The input symbol  185   a  may be a circle or other marker that may visually emphasize a location of the received input. The light trail  185   b  may be indicative of a path of travel or previous movement of the received input. To illustrate, the active input area  150  may be a trackpad and the light trail  185   b  may visually represent a swiping movement of a user across the translucent layer  116 . The input symbol  185   a  may be a location where the swiping movement ceased, a location of where a different type of input was received (such as a force input or a click), or other characteristic of the received input. 
     With reference to  FIG. 5B , the dynamic input region  128  is shown with a visual output  186  illuminated on the translucent layer  116 . The visual output  186  may visually emphasize a manipulation of the active input area  150  within the dynamic input region  128 . In particular, the visual output  186  may be a light trail indicative of a repositioning or path of travel of the active input area  150 . For example, the visual output  186  may indicate that the active input area  150  moved from a first position A to a second position A′ within the dynamic input region  128  and/or the path of travel of the active input area  150  between the first and second positions within the dynamic input region  128 . 
     With reference to  FIG. 5C , the dynamic input region  128  is shown with a visual output  187  illuminated on the translucent layer  116 . The visual output  187  may visually emphasize a manipulation of the active input area  150  within the dynamic input region  128 . In particular, the visual output  187  may show a previous and/or anticipated boundary of the active input area  150 . For example, the active input area  150  may be resized to encompass a smaller or larger portion of the dynamic input region  128 , as described herein. The visual output  187  may represent an anticipated larger boundary of the active input area  150  and/or may represent a previous boundary of the active input region, as may be appropriate for a given application. 
       FIGS. 6A and 6B  show various visual outputs depicted within the dynamic input region  128  that may be used to visually emphasize multiple active input regions. For example, the dynamic input region  128  may be configured to detect multiple inputs concurrently and/or otherwise be configured to control different functions of the electronic device  104  in response to input received at distinct areas of the translucent layer  116 . The visual output may therefore signify to the user the presence of the various distinct input functionalities on the translucent layer  116 . 
     With reference to  FIG. 6A , a virtual keyboard  120 ′ and the active input area  150  are illuminated within the dynamic input region  128 . The virtual keyboard  120 ′ may include a set of keys or key regions that are illuminated on the surface of the translucent layer  116 . Each key or key region of the virtual keyboard  120 ′ may be configured to detect an input along a key surface. The electronic device  104  may be responsive to the input received at each of the keys, for example, such as modifying or updating an output of a display based on detecting a keypress at particular keys of the virtual keyboard  120 ′. The active input area  150  may be illuminated on the translucent layer  116  proximate to or adjacent the illuminated keys. The electronic device  104  may be separately responsive to input received with the active input area. In this manner, the dynamic input region  128  may be used to define both a virtual or dynamic keyboard and trackpad, both of which may be customizable within the dynamic input region  128 . For example, in response to an input, any of the illuminated keys and the trackpad may be moved, resized, or otherwise manipulated in or to accommodate various user preferences. The configuration shown in  FIG. 6A  may also allow the dynamic input region  128  to detect multi-input concurrently, such as detecting a keypress and a swipe along the trackpad at the same time or in rapid succession. 
     With reference to  FIG. 6B , the dynamic input region  128  is shown with multiple visual outputs illuminated that may visually emphasize multiple inputs received along the dynamic input region  128 . For example, a visual output  188  is shown illuminated within the active input area  150 . The visual output  188  may correspond to a boundary of an input. Further, a visual output  189  is shown illuminated within the dynamic input region  128  and outside of the active input area  150 . For example, as described herein, the dynamic input region  128  may be configured to receive an auxiliary input outside of the active input area  150 . The auxiliary input received outside of the active input area  150  may control the electronic device  104  in a manner that is distinct from input received within the active input area  150 . This may be beneficial, for example, where the active input area  150  defines a trackpad or button of the electronic device  104  and the dynamic input region  128  (outside of the active input area  150 ) is used to receive input from a stylus or other input involving motion across the translucent layer  116 . In this regard, in one embodiment, the visual output may include an input symbol  189   a  and a light trail  189   b . Substantially analogous to the embodiments described with respect to  FIG. 5A , the input symbol  189   a  may correspond to a location of a received input and the light trail  189   b  may correspond to a path of travel of the input along the translucent layer  116 . The input received within the active input area  150  (represented by the visual output  188 ) and the input received outside of the active input area  150  (represented by the visual output  189 ) may occur, and be detected and illuminated, concurrently; however, this is not required. 
       FIGS. 7A-7C  show various visual outputs depicted with the dynamic input region  128  that may be used to convey information relating to a status of notification from the electronic device  104 . The visual outputs may be static, updateable, or dynamic, as may be appropriate for a given application. In some cases, the visual outputs may be associated with an area of the dynamic input region  128  configured to receive an input (e.g., such as where the visual output depicts a power button on the translucent layer  116 ). In other cases, the visual outputs are not associated with an input functionality, but rather are used to convey information or a notification to a user. 
     With reference to  FIG. 7A , multiple visual outputs are shown illuminated on the translucent layer  116 . These may be substantially static outputs of the electronic device  104 . In particular, a visual output  190  and a visual output  191  may be illuminated on the translucent layer  116 . The visual output  190  may correspond to a power button or symbol. The visual output  190  may thus be configured to receive an input along the dynamic input region  128  and control a function of the electronic device  104  (e.g., such as switching the power between an off, on, stand-by, and/or other mode). The visual output  191  may correspond to a location of a component or assembly within the electronic device  104 . For example, the visual output  191  may be a symbol that shows the location of an inductive power coil or other internal charging system of the electronic device  104 . This may allow the electronic device  104 , for example, to be substantially free of markings or other permanent indicia relating to the charging assembly, as the visual output  191  may appear on the translucent layer  116  only when illuminated. 
     With reference to  FIG. 7B , the dynamic input region  128  is shown with a visual output  192  illuminated on the translucent layer  116 . The visual output  192  may convey updateable information to the user related to a status or condition of the electronic device  104 . In the embodiment illustrated in  FIG. 7B , the visual output  192  may be a symbol corresponding to a battery depletion level of the electronic device  104 . The visual output  192  may be illuminated, for example, along a periphery of the translucent layer  116 . This may allow a user to view the visual output  192  (and determine the corresponding battery depletion level), when the electronic device  104  is in a closed configuration. The symbol corresponding to a battery depletion level of the electronic device  104  is shown in  FIG. 7B  for purposes of illustration only; in other cases, other symbols are possible and are described herein. 
     With reference to  FIG. 7C , the dynamic input region  128  is shown with a visual output  193  illuminated on the translucent layer  116 . The visual output  193  may be a dynamic output of the electronic device  104 . For example, the visual output  193  may depict moveable symbols or other dynamically updateable information. In one embodiment, the visual output  193  may be illuminated in response to a voice activated input. For example, the electronic device  104  may be configured to receive a voice prompt that causes the electronic device  104  to be momentarily controlled by voice commands. During the period in which the electronic device  104  may be momentarily controlled by voice commands, or during other periods, the visual output  193  may appear within the dynamic input region  128 . The visual output  193  is shown in  FIG. 7C  having dynamic sinusoidal lines (which may move or vibrate as the electronic device  104  is momentarily controlled by voice commands). However, in other embodiments, other substantially dynamic visual outputs of the electronic device  104  are possible. 
       FIGS. 8A and 8B  depict various embodiments of the illumination of the translucent layer  116  when the electronic device  104  is in a closed configuration. As described herein, in the closed configuration, the upper enclosure  108   a  and the lower enclosure  108   b  may be aligned or positioned substantially parallel to one another. In the closed configuration, the upper enclosure  108   a  and the lower enclosure  108   b  may be separated by a gap  130 . Various active input areas, visual outputs, and so on may be illuminated on the translucent layer  116  when the electronic device  104  is in the closed configuration. The illumination of the translucent layer  116  may thus be visually perceptible to the user, which may allow the user to receive information relating to the electronic device  104  and/or apply an input notwithstanding the electronic device  104  being in the closed configuration. 
     With reference to  FIG. 8A , a light path L 6  is shown being emitted from the electronic device  104 . For example, as described with respect to  FIG. 2F , the light path L 6  may be emitted through the gap  130  when the electronic device  104  is in a closed configuration. The light path L 6  may be representative of visually perceptive light caused by an illumination of an active input area or visual output illuminated on the translucent layer  116 . 
     With reference to  FIG. 8B , a light path L 7  is shown being emitted from an end or side of the translucent layer  116 . For example, as described with respect to  FIG. 2F , the light path L 7  may be emitted from the end or side of the translucent layer  116  when the electronic device  104  is in a closed configuration. In some cases, light propagated along the light path L 7  may be used to define a dynamic input region and/or an active input area, as may be appropriate for a given application. 
       FIGS. 9A-11  depict various electronic devices having a dynamic input region. Broadly, the dynamic input region may be formed on any external surface of an electronic device formed from a translucent layer. This may be a device enclosure, case, cover, panel, display, masking area, or other surface of an electronic device. The translucent layer may be illuminated to reveal input functionality of the dynamic input region. For example, an active input area, visual output, or other optical effect may be illuminated on the external surface. Various sensing elements, haptic structures, light-emitting elements, and/or other appropriate components or assemblies, described herein, may be positioned within the electronic device and configured to detect input along the dynamic input region. 
       FIG. 9A  depicts an electronic device  904 . The electronic device  904  may be a mobile phone. For purposes of illustration, the electronic device  904  is shown as having an enclosure  908 , a touch-sensitive display  914 , a translucent layer  916 , one or more input/output members  906 , and a speaker  907 . It should be noted that the electronic device may also include various other components, such as one or more ports (e.g., charging ports, data transfer ports, or the like), additional input/output buttons, and so on. As such, the discussion of any electronic device, such as electronic device  904  is meant as illustrative only. 
       FIG. 9B  depicts a bottom surface of the enclosure  908  of the electronic device  904 . The electronic device  904  may include a translucent layer  916  that forms the bottom surface of the enclosure  908 . As shown in  FIG. 9B , the electronic device  904  may include a dynamic input region  928 . The dynamic input region  928  may be configured to detect an input used to control a function of the electronic device  904 . Accordingly, it will be appreciated that the dynamic input region  928  may be substantially analogous to the dynamic input region  128  described above. For example, electronic device  904  may include various sensing elements, light-emitting elements, haptic structures, and/or other components or assemblies configured to illuminate the translucent layer  916  at the dynamic input region  128  and detect an input. As shown in the embodiment of  FIG. 9B , a visual output  929  may be illuminated on the translucent layer  916  at the dynamic input region  928 . 
       FIG. 10  depicts an electronic device  1004 . The electronic device  1004  may be a watch or other portable wearable electronic device. For purposes of illustration, the watch is shown as having an enclosure  1008 , a crown  1006 , a touch-sensitive display  1014 , and a band  1024 . The touch-sensitive display  1014  may be positioned in a first opening defined by the enclosure  1008  and the crown  1006  may be at least partially positioned in a second opening defined by the enclosure  1008 . The touch-sensitive display  1014  may be responsive to translation and rotational movement of the crown  1006 . For example, a visual output of the touch-sensitive display  1014  may be modified in a first manner in response to rotational movement of the crown  1006  and in a second manner in response to translational movement of the crown  1006 . It should be noted that the electronic device  1004  may also include various other components, such as one or more ports (e.g., charging ports, data transfer ports, or the like), additional input/output buttons, and so on. As such, the discussion of any electronic device, such as electronic device  1004 , is meant as illustrative only. 
     The electronic device  1004  may include a translucent layer  1016  that forms an exterior surface of the enclosure  1008 . As shown in  FIG. 10 , the electronic device  1004  may include a dynamic input region  1028 . The dynamic input region  1028  may be configured to detect an input used to control a function of the electronic device  1004 . Accordingly, it will be appreciated that the dynamic input region  1028  may be substantially analogous to the dynamic input region  128  described above. For example, electronic device  1004  may include various sensing elements, light-emitting elements, haptic structures, and/or other components or assemblies configured to illuminate the translucent layer  1016  at the dynamic input region  1028  and detect an input. As shown in the embodiment of  FIG. 10 , a visual output  1029  may be illuminated on the translucent layer  1016  at the dynamic input region  1028 . 
       FIG. 11  depicts an electronic device  1104 . The electronic device  1104  may be a stylus. The stylus may be used to provide input to an associated electronic device, such as a tablet or smart phone, for example, through interaction with a touch-sensitive surface of the associated electronic device. For purposes of illustration, the electronic device  1104  is shown as having an enclosure  1108  and a tip  1106 . A user may manipulate the enclosure  1108  to provide information to the associated electronic device, for example, by moving the tip  1106  relative to a touch-sensitive surface of the associated electronic device. It should be noted that the electronic device  1104  may also include various other components, such as one or more ports (e.g., charging ports, data transfer ports, or the like), additional input/output buttons, and so on. As such, the discussion of any electronic device, such as electronic device  1104 , is meant as illustrative only. 
     The electronic device  1104  may include a translucent layer  1116  that forms an exterior surface of the enclosure  1108 . As shown in  FIG. 11 , the electronic device  1104  may include a dynamic input region  1128 . The dynamic input region  1128  may be configured to detect an input used to control a function of the electronic device  1104 . Accordingly, it will be appreciated that the dynamic input region  1128  may be substantially analogous to the dynamic input region  128  described above. For example, electronic device  1104  may include various sensing elements, light-emitting elements, haptic structures, and/or other components or assemblies configured to illuminate the translucent layer  1116  at the dynamic input region  1128  and detect an input. As shown in the embodiment of  FIG. 11 , a visual output  1129  may be illuminated on the translucent layer  1116  at the dynamic input region  1128 . 
       FIG. 12  presents a functional block diagram  1200  of a sample electronic device, such as the electronic device  104  described with respect to  FIGS. 1A-8B . It will be appreciated, however, that the functional block diagram described herein of electronic device  104  may include components substantially analogous to components of other electronic devices of the like described herein. In this regard, the schematic representation in  FIG. 12  may correspond to the electronic device depicted in  FIGS. 1A-8B , described above. However, the schematic representation in  FIG. 12  may also correspond to the other electronic devices or the like described herein, for example, such as electronic devices  904 ,  1004 , and/or  1104 , described with respect to  FIGS. 9A-11 . The electronic device  104  may include any appropriate hardware (e.g., computing devices, data centers, switches), software (e.g., applications, system programs, engines), network components (e.g., communication paths, interfaces, routers), and the like (not necessarily shown in the interest of clarity) for use in facilitating any appropriate operations disclosed herein. 
     As shown in  FIG. 12 , the electronic device  104  may include a processing unit or element  1208  operatively connected to computer memory  1212  and computer-readable media  1216 . The processing unit  1208  may be operatively connected to the memory  1212  and computer-readable media  1216  components via an electronic bus or bridge (e.g., such as system bus  1210 ). The processing unit  1208  may include one or more computer processors or microcontrollers that are configured to perform operations in response to computer-readable instructions. The processing unit  1208  may be a central processing unit of the stylus. Additionally or alternatively, the processing unit  1208  may be other processors within the device including application specific integrated chips (ASIC) and other microcontroller devices. 
     The memory  1212  may include a variety of types of non-transitory computer-readable storage media, including, for example, read access memory (RAM), read-only memory (ROM), erasable programmable memory (e.g., EPROM and EEPROM), or flash memory. The memory  1212  is configured to store computer-readable instructions, sensor values, and other persistent software elements. Computer-readable media  1216  may also include a variety of types of non-transitory computer-readable storage media, including, for example, a hard-drive storage device, a solid state storage device, a portable magnetic storage device, or other similar device. The computer-readable media  1216  may also be configured to store computer-readable instructions, sensor values, and other persistent software elements. 
     In this example, the processing unit  1208  is operable to read computer-readable instructions stored on the memory  1212  and/or computer-readable media  1216 . The computer-readable instructions may adapt the processing unit  1208  to perform the operations or functions described above with respect to  FIGS. 1A-11 . The computer-readable instructions may be provided as a computer-program product, software application, or the like. It should be appreciated that, where the electronic device is a stylus, the processing unit  1208  may be located in an electronic device associated with the stylus, rather than the stylus itself. In such embodiments, data may be transmitted from the stylus to and from the electronic device, such that the processing unit in the electronic device may operatively control the stylus. 
     As shown in  FIG. 12 , the electronic device  104  may also include a display  1218 . The display  1218  may include a liquid-crystal display (LCD), organic light-emitting diode (OLED) display, light-emitting diode (LED) display, or the like. If the display  1218  is an LCD, the display may also include a backlight component that can be controlled to provide variable levels of display brightness. If the display  1218  is an OLED or LED type display, the brightness of the display  1218  may be controlled by modifying the electrical signals that are provided to display elements. 
     The electronic device  104  may also include a battery  1224  that is configured to provide electrical power to the components of the electronic device  104 . The battery  1224  may include one or more power storage cells that are linked together to provide an internal supply of electrical power. In this regard, the battery  1224  may be a component of a power source  1228  (e.g., including a charging system or other circuitry that supplies electrical power to components of the electronic device  104 ). The battery  1224  may be operatively coupled to power management circuitry that is configured to provide appropriate voltage and power levels for individual components or groups of components within the electronic device  104 . The battery  1224 , via power management circuitry, may be configured to receive power from an external source, such as an AC power outlet or interconnected computing device. The battery  1224  may store received power so that the electronic device  104  may operate without connection to an external power source for an extended period of time, which may range from several hours to several days. 
     The electronic device  104  may also include one or more sensors  1240  that may be used to detect a touch and/or force input, environmental condition, orientation, position, or some other aspect of the electronic device  104 . For example, sensors  1240  that may be included in the electronic device  104  may include, without limitation, one or more accelerometers, gyrometers, inclinometers, goniometers, or magnetometers. The sensors  1240  may also include one or more proximity sensors, such as a magnetic hall-effect sensor, inductive sensor, capacitive sensor, continuity sensor, or the like. 
     The sensors  1240  may also be broadly defined to include wireless positioning devices, including, without limitation, global positioning system (GPS) circuitry, Wi-Fi circuitry, cellular communication circuitry, and the like. The electronic device  104  may also include one or more optical sensors, including, without limitation, photodetectors, photo sensors, image sensors, infrared sensors, or the like. In one example, the sensor  1240  may be an image sensor that detects a degree to which an ambient image matches a stored image. As such, the sensor  1240  may be used to identify a user of the electronic device  104 . The sensors  1240  may also include one or more acoustic elements, such as a microphone used alone or in combination with a speaker element. The sensors  1240  may also include a temperature sensor, barometer, pressure sensor, altimeter, moisture sensor or other similar environmental sensor. The sensors  1240  may also include a light sensor that detects an ambient light condition of the electronic device  104 . 
     The sensor  1240 , either alone or in combination, may generally be a motion sensor that is configured to estimate an orientation, position, and/or movement of the electronic device  104 . For example, the sensor  1240  may include one or more motion sensors, including, for example, one or more accelerometers, gyrometers, magnetometers, optical sensors, or the like to detect motion. The sensors  1240  may also be configured to estimate one or more environmental conditions, such as temperature, air pressure, humidity, and so on. The sensors  1240 , either alone or in combination with other input, may be configured to estimate a property of a supporting surface, including, without limitation, a material property, surface property, friction property, or the like. 
     The electronic device  104  may also include a camera  1232  that is configured to capture a digital image or other optical data. The camera  1232  may include a charge-coupled device, complementary metal oxide (CMOS) device, or other device configured to convert light into electrical signals. The camera  1232  may also include one or more light sources, such as a strobe, flash, or other light-emitting device. As discussed above, the camera  1232  may be generally categorized as a sensor for detecting optical conditions and/or objects in the proximity of the electronic device  104 . However, the camera  1232  may also be used to create photorealistic images that may be stored in an electronic format, such as JPG, GIF, TIFF, PNG, raw image file, or other similar file types. 
     The electronic device  104  may also include a communication port  1244  that is configured to transmit and/or receive signals or electrical communications from an external or separate device. The communication port  1244  may be configured to couple to an external device via a cable, adaptor, or other type of electrical connector. In some embodiments, the communication port  1244  may be used to couple the electronic device  104  with a computing device and/or other appropriate accessories configured to send and/or receive electrical signals. The communication port  1244  may be configured to receive identifying information from an external accessory, which may be used to determine a mounting or support configuration. For example, the communication port  1244  may be used to determine that the electronic device  104  is coupled to a mounting accessory, such as a particular type of stand or support structure. 
     As shown in  FIG. 12 , the electronic device  104  may also include one or more input devices  1246 . The input device  1246  may be, or include, the dynamic input region  128  (and associated elements) described herein. For example, the input device  1246  may be configured to receive an input that is used to control a function of the electronic device  104 . Additionally, the input device  1246  may be one or more of a keyboard, mouse, pen, stylus, sound input device, touch input device, or the like. 
     Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Also, as used herein, including in the claims, “or” as used in a list of items prefaced by “at least one of” indicates a disjunctive list such that, for example, a list of “at least one of A, B, or C” means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Further, the term “exemplary” does not mean that the described example is preferred or better than other examples. 
     The foregoing description, for purposes of explanation, uses specific nomenclature to provide a thorough understanding of the described embodiments. However, it will be apparent to one skilled in the art that the specific details are not required in order to practice the described embodiments. Thus, the foregoing descriptions of the specific embodiments described herein are presented for purposes of illustration and description. They are not targeted to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to one of ordinary skill in the art that many modifications and variations are possible in view of the above teachings.

Metadata:
Filing Date: 20200702
Publication Date: 20220628
Grant Date: 20220628
Priority Date: 20170906
Inventors: XU, QILIANG
MATHEW, DINESH C.
GARELLI, ADAM T.
HUIZAR, RICHARD G.
KIM, GENIE
LOCKWOOD, ROBERT J.
CAO, ROBERT Y.
Assignee: APPLE INC
CPC Classifications: [{"code": "G06F3/044", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/1673", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/163", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/03545", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1656", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/03547", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/044", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F3/04883", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/0076", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01H13/14", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01H2219/062", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/1692", 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Family ID: 65518036