PATENT DOCUMENT

Publication Number: US-10303209-B2
Application Number: US-201815913724-A
Country: US
Kind Code: B2

Title: Flexible keyboard accessory for a portable electronic device

Abstract:
An accessory device for use with an electronic device is disclosed. The accessory device may include a cover configured to overlay an electronic device (or device) or fold to form a support structure for the electronic device. The cover may include an attachment feature that electrically couples with the device, and a keyboard foldable with respect to the cover. Further, the keyboard may include a retention feature designed to receive the attachment feature in a folded configuration of the cover. The accessory device may further include an electrically conductive fabric that folds with the cover. The accessory device may include an array of magnets throughout the attachment feature, the cover, and the keyboard. The magnets may be used to magnetically couple together 1) segments of the cover, 2) the cover and the keyboard assembly, 3) and/or the device with the cover.

Claims:
What is claimed is: 
     
       1. An accessory for an electronic device, the accessory comprising: a cover having a size and shape to cover a device display of the electronic device, the cover having a first end and a second end opposite the first end; a body connected to the cover at the first end, the body rotatably coupled to the cover at the first end, the body comprising a display assembly; an attachment feature that is capable of releasably coupling with the electronic device, the attachment feature connected to the cover at the second end, wherein the display assembly is in communication with the electronic device when the attachment feature is coupled with the electronic device; and a retention feature that is integrated with the body and supports the attachment feature when the attachment feature is at least partially engaged with the retention feature. 
     
     
       2. The accessory of  claim 1 , wherein the display assembly comprises a touch input mechanism. 
     
     
       3. The accessory of  claim 2 , wherein the display assembly is capable of presenting a keyboard that uses the touch input mechanism. 
     
     
       4. The accessory of  claim 1 , further comprising an electrical contact capable of electrically coupling with the electronic device. 
     
     
       5. The accessory of  claim 4 , further comprising:
 a first magnetic element carried by the attachment feature; 
 a second magnetic element carried by the attachment feature, wherein the electrical contact is positioned between the first magnetic element and the second magnetic element; and 
 a third magnetic element embedded in the body at a location corresponding to the retention feature, wherein the first magnetic element and the second magnetic element magnetically interact with i) device magnets of the electronic device to align and secure a device contact of the electronic device with the electrical contact, and ii) the third magnetic element to secure the attachment feature with the retention feature. 
 
     
     
       6. The accessory of  claim 1 , further comprising a cover layer that at least partially covers the cover and the body, the cover layer securing the attachment feature with the cover. 
     
     
       7. The accessory of  claim 1 , wherein the retention feature defines a ring that protrudes from the body. 
     
     
       8. An accessory for an electronic device that includes a device display, the accessory comprising: a body that carries a display assembly that is capable of presenting visual information; a first magnet embedded in the body; a foldable cover coupled with the body, the foldable cover capable of covering the device display; an attachment feature coupled with the foldable cover; and a second magnet carried by the attachment feature and capable of magnetically coupling with the electronic device, wherein the foldable cover is capable of folding with respect to the body such that the second magnet magnetically couples with the first magnet and combines with the body to retain and support the electronic device. 
     
     
       9. The accessory of  claim 8 , further comprising a retention feature that protrudes from the body, wherein the first magnet is embedded in the body in a location corresponding to the retention feature. 
     
     
       10. The accessory of  claim 9 , wherein the retention feature defines a ring on the body. 
     
     
       11. The accessory of  claim 10 , wherein when the second magnet magnetically couples with the first magnet, the attachment feature is at least partially positioned in the ring. 
     
     
       12. The accessory of  claim 8 , wherein the foldable cover comprises:
 a first segment coupled with the body; and 
 a second segment coupled with the attachment feature. 
 
     
     
       13. The accessory of  claim 8 , wherein the visual information includes a keyboard, and wherein the display assembly comprises a touch input display that is used by the keyboard. 
     
     
       14. The accessory of  claim 8 , wherein the device display defines a first display of a dual display system, and wherein the display assembly defines a second display of the dual display system. 
     
     
       15. An accessory for use with an electronic device, the accessory comprising:
 an attachment feature that includes a first magnet capable of magnetically coupling with the electronic device;
 a cover having a first end and a second end opposite the first end, the cover secured with the attachment feature at the first end, the cover including:
 a first segment, 
 a second segment separated from the first segment by a first foldable region, and 
 a third segment separated from the second segment by a second foldable region; and 
 
 a body secured with the cover at the second end, the body including a second magnet, wherein when the cover folds at the first foldable region and the second foldable region to define a support structure, the first magnet is positioned on the body such that the first magnet magnetically couples with the second magnet and the support structure supports the electronic device. 
 
 
     
     
       16. The accessory of  claim 15 , wherein the body comprises a display assembly. 
     
     
       17. The accessory of  claim 16 , wherein the display assembly comprises a touch input display. 
     
     
       18. The accessory of  claim 16 , wherein the display assembly presents a keyboard. 
     
     
       19. The accessory of  claim 16 , wherein the display assembly presents multiple applications. 
     
     
       20. The accessory of  claim 15 , wherein the cover includes a size and shape capable of covering a display of the electronic device.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation of U.S. application Ser. No. 15/275,268, filed Sep. 23, 2016, entitled “FLEXIBLE KEYBOARD ACCESSORY FOR A PORTABLE ELECTRONIC DEVICE”, which is a continuation of U.S. application Ser. No. 15/256,433, filed Sep. 2, 2016, entitled “FLEXIBLE KEYBOARD ACCESSORY FOR A PORTABLE ELECTRONIC DEVICE”, now U.S. Pat. No. 9,946,295, which claims the benefit of priority under 35 U.S.C. § 119(e) to U.S. Provisional Application Ser. No. 62/214,671, filed on Sep. 4, 2015, entitled “FEATURES OF A FLEXIBLE KEYBOARD ACCESSORY FOR A PORTABLE ELECTRONIC DEVICE” the contents of which are incorporated herein by reference in their entirety for all purposes. 
    
    
     FIELD 
     The following description relates to an accessory device used in conjunction with an electronic device. In particular, the following description relates to an accessory device used to support and protect the electronic device in various foldable configurations. Further, the accessory device may include a keyboard assembly used to generate an input or command to the electronic device. When coupled with the electronic device, the accessory device also may be in electrical communication with the electronic device. 
     BACKGROUND 
     An accessory device is used with an electronic device. Further, an accessory device provides a protective cover for the electronic device, by coupling with and folding over the electronic device. Also, some accessory devices include layers of different materials designed to provide an aesthetic appearance. 
     SUMMARY 
     In one aspect, an accessory device suitable for use with an electronic device is described. The accessory device may include a foldable cover that includes an attachment feature configured to couple with the electronic device. The accessory device may further include a keyboard assembly hingedly coupled with the foldable cover allowing the keyboard assembly to rotate with respect to the foldable cover. The keyboard assembly may include a retention feature configured to receive the attachment feature. The accessory device may further include an electrically conductive fabric extending from the attachment feature to the keyboard assembly. In some instances, the electrically conductive fabric provides an electrical communication path between the electronic device and the keyboard assembly. 
     In another aspect, an accessory device suitable for use with an electronic device. The electronic device may include a display assembly, a first device magnet having a first magnetic polarity, a second device magnet having a second magnetic polarity opposite the first magnetic polarity, and an electrical contact. The accessory device may include a cover having a size and shape to overlay the display assembly. The accessory device may further include a keyboard rotatably coupled with the cover. The accessory device may further include an attachment feature secured with the cover. The attachment feature may include a first magnet having the second magnetic polarity to magnetically couple with the first device magnet. The attachment feature may further include a second magnet having the first magnetic polarity to magnetically couple with the second device magnet. The attachment feature may further include a contact that electrically couples with the electrical contact to place the electronic device in electrical communication with the keyboard. 
     In another aspect, an accessory device suitable for use with an electronic device. The accessory device may include a cover that releasably couples with the electronic device. The accessory device may further include a keyboard assembly secured with the cover by a hinge. The accessory device may further include a support layer embedded in the hinge. In some embodiments, the keyboard assembly is foldable with respect to the cover in a first direction. Also, in some embodiments, the support layer limits movement of the keyboard assembly in a second direction opposite the first direction. 
     Other systems, methods, features and advantages of the embodiments will be, or will become, apparent to one of ordinary skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the embodiments, and be protected by the following claims. 
    
    
     
       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 structural elements, and in which: 
         FIG. 1  illustrates an isometric view of an embodiment of an accessory device, in accordance with the described embodiments; 
         FIG. 2  illustrates an exploded view of the attachment feature, showing several features that form the attachment feature; 
         FIG. 3  illustrates a cross sectional view of the attachment feature, showing the various components of the attachment feature assembled together; 
         FIG. 4  illustrates a plan view showing the cover, showing the second cover layer extending to wrap around and overlay the attachment feature (as shown in  FIG. 3 ); 
         FIG. 5  illustrates a plan view of the accessory device, showing several magnets and detection mechanisms positioned throughout the accessory device; 
         FIG. 6  illustrates an isometric view of an embodiment of an electronic device suitable for use with the accessory device shown in  FIG. 1 ; 
         FIG. 7  illustrates a side view of the accessory device coupled with the electronic device, with the accessory device in a folded configuration to allow use of the keyboard assembly with the electronic device; 
         FIG. 8  illustrates an enlarged view of Section A, shown in  FIG. 7 , showing the attachment feature positioned in the retention feature; 
         FIG. 9  illustrates a side view of the accessory device coupled with the electronic device, with the accessory device in an alternate folded configuration to further position the electronic device in an upright position; 
         FIG. 10  illustrates a side view of the accessory device coupled with the electronic device, with the accessory device in an alternate folded configuration to position the keyboard assembly behind the electronic device; 
         FIG. 11  illustrates a side view of the accessory device coupled with the electronic device, with the accessory device in an alternate folded configuration behind the electronic device such that the accessory device supports the electronic device in a horizontal position; 
         FIG. 12  illustrates an isometric view of the accessory device in a closed configuration, showing the accessory device positioned over the display assembly of the electronic device; 
         FIG. 13  illustrates a plan view of the accessory device, showing a support layer extending along the first segment and partially onto the keyboard assembly; 
         FIG. 14  illustrates a side view of the accessory device, with the keyboard assembly folded over and onto the cover; 
         FIG. 15  illustrates a side view of the accessory device, with the keyboard assembly folded away from the cover; 
         FIG. 16  illustrates a cross sectional view of the accessory device, showing the support layer combining with other features to limit the movement of the keyboard assembly with respect to the cover; 
         FIG. 17  illustrates a cross sectional view of an alternate embodiment of an accessory device, showing a support layer combining with a rigid layer to limit the movement of a keyboard assembly with respect to a cover; 
         FIG. 18  illustrates an interior view of an embodiment of a top portion of a keyboard assembly, showing a vent system distributed throughout the keyboard assembly that allows passage of air into and out of the keyboard assembly; 
         FIG. 19  illustrates a partial exterior view of the top portion of the keyboard assembly shown in  FIG. 18 , further showing the first opening; and 
         FIG. 20  illustrates a partial plan view of an alternative embodiment of an accessory device having a display assembly in place of a keyboard assembly. 
     
    
    
     Those skilled in the art will appreciate and understand that, according to common practice, various features of the drawings discussed below are not necessarily drawn to scale, and that dimensions of various features and elements of the drawings may be expanded or reduced to more clearly illustrate the embodiments of the present invention described herein. 
     DETAILED DESCRIPTION 
     Reference will now be made in detail to representative embodiments illustrated in the accompanying drawings. It should be understood that the following descriptions are not intended to limit the embodiments to one preferred embodiment. To the contrary, it is intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the described embodiments as defined by the appended claims. 
     In the following detailed description, references are made to the accompanying drawings, which form a part of the description and in which are shown, by way of illustration, specific embodiments in accordance with the described embodiments. Although these embodiments are described in sufficient detail to enable one skilled in the art to practice the described embodiments, it is understood that these examples are not limiting such that other embodiments may be used, and changes may be made without departing from the spirit and scope of the described embodiments. 
     The following disclosure relates to an accessory device suitable for use with an electronic device. The accessory device may include a cover and a keyboard assembly secured with the cover. The accessory device may further include an attachment feature secured with the cover, and used to secure the electronic device with the accessory device by way of a magnet (or magnets) disposed in the attachment feature. Further, when the electronic device is secured with the accessory device, the attachment feature includes a contact that electrically couples with the electronic device. Also, the accessory device may include an electrically conductive fabric embedded between two or more layers of material, extending from the contact to the keyboard assembly. In this manner, the electronic device can be in electrical communication with the keyboard assembly by way of an electrically conductive fabric and the contact. Also, the cover can take the form of a foldable cover to support the electronic device in various folded configurations, and can also be unfolded to cover a display of the electronic device. The electrically conductive fabric may fold and unfold in accordance with the foldable cover. 
     The accessory device may include several magnets distributed internally throughout not only the attachment feature, but also the cover and the keyboard assembly. For example, the cover may include multiple segments that are foldable with respect to each other by way of fold regions between the segments, with the cover defining a support structure based upon a folded configuration of the segments. In order to maintain the folded configuration, several segments may include cover magnets embedded in the segments, allowing allow at least some segments to magnetically couple with one another and form several magnetic circuits to maintain engagement between the segments. The accessory device may include additional magnets to provide the accessory device with additional capabilities. For example, additional cover magnets embedded in the segments are positioned and designed to magnetically couple with keyboard magnets embedded in the keyboard assembly. In this regard, the keyboard assembly can magnetically couple with the cover when the keyboard assembly is folded onto the cover. Some of the cover magnets and the keyboard magnets may also be used to magnetically couple and secure the electronic device with the cover and the keyboard assembly, respectively. 
     Also, both the cover and the keyboard assembly may include a detection mechanism, such as a Hall effect sensor, designed to detect an external magnetic field generated by one or more magnets. The detection of the external magnetic field can correspond to a position of the cover with respect to the electronic device, or the cover with respect to the keyboard assembly. Further, the detection mechanism can determine that, for example, the keyboard assembly is not magnetically coupled with the cover. In this regard, in one embodiment, when the keyboard assembly is pulled away from the cover and positioned for use with the electronic device, the detection mechanism, in response to no longer detecting the external magnetic field, generates an electrical input (or input signal) to a processor of the electronic device (or in some cases, the accessory device), causing the keyboard assembly to power on. Accordingly, in order to operate, the keyboard assembly may use electrical current, which may be provided by the electronic device by way of the electrically conductive fabric. 
     In addition to providing a magnetic and electrical coupling with the electronic device, the attachment feature may be used to support the electronic device in a folded configuration. For example, the attachment feature magnets may magnetically couple with magnets in the keyboard assembly (in addition to magnets in the electronic device). Further, in a particular folded configuration, the attachment feature may be positioned in a retention feature of the keyboard assembly that provides a mechanical stop to limit and/or prevent movement of the attachment feature and, accordingly, the electronic device (coupled with the attachment feature). The keyboard assembly may also include additional keyboard magnets embedded in the keyboard and disposed below the retention feature. These keyboard magnets can magnetically couple with the attachment feature magnets. In this manner, the magnets positioned below the retention feature provide a magnetic attraction force and combine with the retention feature to maintain a fixed position of the attachment feature and, accordingly, the electronic device coupled with the attachment feature. 
     Also, while the keyboard assembly may be foldable with the respect to the cover, the accessory device may include features that limit movement of the keyboard assembly. For example, the accessory device may include a support layer that includes an embedded material extending along the cover and the keyboard assembly. The material may include a liquid crystal polymer fiber material designed to allow some movement, and restrict other movement. For example, when the keyboard assembly is not in use, the keyboard assembly may be folded over and onto the cover. However, to use the keyboard assembly, a user may fold the keyboard assembly away from the cover. The support layer may limit the movement of the keyboard assembly with respect to cover by limiting rotational movement of the keyboard assembly to 180 degrees, or approximately 180 degrees, with respect to the cover. In this manner, the keyboard assembly may present itself in a flat or horizontal manner, co-planar with the cover, and in a manner consistent with a keyboard assembly resting on a flat surface, such as a table, even though the keyboard assembly is unsupported by the flat surface. Further, the cover may be folded to support the electronic device at an angle with respect to the keyboard assembly to present the electronic device and the keyboard assembly in a configuration similar to a traditional portable computing device (such as a laptop). However, the accessory device may provide greater portability relative to the portable computing device by detaching from the electronic device, thereby allowing the accessory device to couple with another electronic device. 
     Also, the accessory device may be designed such that the electronic device can be constructed for use with additional accessory devices. For example, a case or shell, used to receive an enclosure of the electronic device, may include an opening that accommodates the accessory device, and in particular, the attachment feature of the accessory device. This allows for greater protection to the electronic device, and further allows a user to change accessories according to a desired preference. 
     These and other embodiments are discussed below with reference to  FIGS. 1-20 . However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these Figures is for explanatory purposes only and should not be construed as limiting. 
       FIG. 1  illustrates an isometric view of an embodiment of an accessory device  100 , in accordance with the described embodiments. The accessory device  100  may be suitable for use with an electronic device (not shown), such as a tablet computing device or a smartphone, when the electronic device is coupled with the accessory device  100 . As shown, the accessory device  100  may include a cover  102  coupled with a keyboard assembly  104 . The cover  102  may include a size and a shape to overlay, or cover, a display assembly (not shown) of an electronic device. In some embodiments, the cover  102  includes multiple segments. For example, as shown in  FIG. 1 , the cover  102  includes a first segment  106 , a second segment  108 , and a third segment  110 . Each segment can include a panel (not shown) formed from a rigid material, such as glass fiber, to provide structural support. In order to form the segmented design, the first segment  106 , the second segment  108 , and the third segment  110  may undergo a de-boss operation to a desired shape. Also, each of the first segment  106 , the second segment  108 , and the third segment  110  may be moveable or rotatable with respect to the remaining segments by way of fold regions between adjacent segments. In this regard, the cover  102  may be referred to, and used as, as a foldable cover. The cover  102  may be folded into several distinct folded configurations, which will be shown and described below. Further, as shown in  FIG. 1 , the third segment  110  may be raised or elevated with respect to the first segment  106  and the second segment  108 . The raised feature of the third segment  110  allows the keyboard assembly  104  to fold over and onto the first segment  106  and the second segment  108  such that the keyboard assembly  104 , and in particular a rear portion (not shown) of the keyboard assembly  104 , is co-planar, or flush, with respect to the third segment  110 . This will be shown below. 
     Also, the cover  102  may include a first cover layer  112  and a second cover layer  118  that combines with the first cover layer  112  to cover each of the aforementioned segments and their respective panels. The first cover layer  112  and the second cover layer  118  may allow the keyboard assembly  104  to fold with respect to the cover  102 , or vice versa. In this regard, the first cover layer  112  and the second cover layer  118  may combine to define a hinge  105  between the cover  102  and the keyboard assembly  104 . However, in order to limit some movement of the keyboard assembly  104 , the hinge  105  may further include a support layer (shown below) embedded between the first cover layer  112  and the second cover layer  118 . The first cover layer  112  may include a fabric layer. The fabric may include microfiber, or generally, any material that provides a cosmetic enhancement while also not causing damage to a display assembly (not shown) of an electronic device. In some embodiments, the second cover layer  118  includes a polymer-based, low modulus elastomeric material that allows some flexibility of the attachment feature  114  with respect to the cover  102 . In some embodiments, the second cover layer  118  includes a mixture of polyurethane and coal tar. In some embodiments, the second cover layer  118  includes silicone. Also, the second cover layer  118  may also come in a variety of colors. Also, the material forming the second cover layer  118  may further include relatively high adhesion to other components. 
     The cover  102  may further include an attachment feature  114  designed to receive and secure an electronic device with the accessory device  100 . In this regard, the attachment feature  114  may include magnets (not shown) disposed in the attachment feature  114 , with each magnet arranged to magnetically couple with one of several magnets (not shown) disposed in an electronic device. Further, the accessory device  100  may include an electrical contact  116  designed to electrically couple with an electrical contact (not shown) of an electronic device when the electronic device is used with the accessory device  100 . Accordingly, the electrical contact  116  may be formed from an electrically conductive material, such as a metal. Also, in other embodiments, the attachment feature  114  includes two or more electrical contacts designed to electrically couple with a corresponding number of electrical contacts in an electronic device. Also, the attachment feature  114  may be coupled with the cover  102  by way of the second cover layer  118  that extends from the cover  102  and wraps around the attachment feature  114  to define a top, or upper, surface of the attachment feature  114 . This will be shown and described below. 
     The second cover layer  118  may further include abrasion-resistant properties. In this regard, the second cover layer  118  may include a relatively high coefficient of friction, which may limit or prevent movement of an electronic device (not shown) should the electronic device engage the portion of the second cover layer  118  that covers the attachment feature  114 . However, in order to lower the coefficient of friction at the attachment feature  114 , the attachment feature  114  may include a first layer  122  and a second layer  124  surrounding the electrical contact  116  and combining to substantially cover the attachment feature  114  in a location that receives the electronic device. The first layer  122  and the second layer  124  may include a lower coefficient of friction relative to the second cover layer  118 , allowing the electronic device to slide against the first layer  122  and the second layer  124  to align and couple with the attachment feature  114 . 
     The keyboard assembly  104  may include keys  126  positioned throughout the keyboard assembly  104 . The keys  126  may include a QWERTY configuration commonly known in the art for a keyboard. However, in other embodiments, the keys  126  include a different configuration according to a language or dialect. The keyboard assembly  104  may include a printed circuit board (not shown) embedded in the keyboard assembly  104  and electrically coupled with the keys  126 . The keyboard assembly  104  may further include a retention feature  128  disposed across, and protruding from, a top surface  130  of the keyboard assembly  104 . The retention feature  128  may be designed to at least partially receive the attachment feature  114  when the cover  102  is in a particular folded configuration. The retention feature  128  may provide a mechanical stop for the attachment feature  114  and an electronic device secured with the attachment feature  114 . This will be shown below. As shown in  FIG. 1 , the retention feature  128  includes a ring-like configuration protruding from the top surface  130 . However, in other embodiments, the retention feature  128  includes two or more discontinuous features that provide the mechanical stop feature similar to a manner previously described. Although not shown, in other embodiments, a trough or “valley” can be located within the retention feature  128  that positions a portion of the attachment feature  114  below the top surface  130 . Also, the keyboard assembly  104  may include an array of magnets (not shown) disposed below the retention feature  128  that magnetically couple with attachment feature magnets in the attachment feature. By magnetically coupling with magnets in the attachment feature  114 , the array of magnets below the retention feature  128  may combine with the retention feature  128  to hold the attachment feature  114  as well as an electronic device secured with the attachment feature  114 . This will be shown below. 
       FIG. 2  illustrates an exploded view of the attachment feature  114 , showing several features that form the attachment feature  114 . For example, the attachment feature  114  may include first attachment feature magnets  132  and second attachment feature magnets  134 . In some embodiments, the first attachment feature magnets  132  and the second attachment feature magnets  134  include several magnets aligned together prior to assembly. In the embodiment shown in  FIG. 2 , the first attachment feature magnets  132  and the second attachment feature magnets  134  are formed form a composition of (initially) non-magnetized material that is magnetized prior to an assembly of the attachment feature  114 . The first attachment feature magnets  132  and the second attachment feature magnets  134  may be placed under a camera/sensor assembly (not shown) and aligned with a magnetizer (not shown) according to a desired alignment between the electrical contact  116  and an electronic device (not shown). This allows for a customized magnetization, or customized external magnetic field, that improves a magnetic alignment between the accessory device  100  (shown in  FIG. 1 ) and an electronic device, thereby improving a magnetic coupling between the accessory device  100  and the electronic device. 
       FIG. 2  further shows the first attachment feature magnets  132  and the second attachment feature magnets  134  having several magnetized regions. As shown, the magnetized regions may include regions of different sizes. This may promote the customized external magnetic field previously described. Also, as known by one of ordinary skill in the art, a magnet generally includes a magnetic polarity having a “North” facing polarity, or North Pole, and a “South” facing polarity, or South Pole, with magnetic field lines pointing in a direction from the North Pole to the South Pole. Also, it is also understood by one of ordinary skill in the art that a North Pole of a magnet may be magnetically attracted to a South Pole of a magnet, and that two North poles, or two South poles, may magnetically repel one another. In this regard, adjacent magnetic regions of the first attachment feature magnets  132  and the second attachment feature magnets  134  may include magnet polarities designed to produce external magnetic fields pointing in opposite directions. 
     For example, as shown in the enlarged view, the first attachment feature magnets  132  may include a first magnetic region  136  and a second magnetic region  138  adjacent to the first magnetic region  136 . The first magnetic region  136  may include an external magnetic field (shown as dotted lines) in accordance with a first magnetic polarity, indicative of a top surface having a North pole and a bottom surface (not shown) opposite the top surface having a South pole. Conversely, the second magnetic region  138  may include an external magnetic field (shown as dotted lines) in accordance with a second magnetic polarity that is opposite the first magnetic polarity, indicative of a top surface having a South pole and a bottom surface (not shown) opposite the top surface having a North pole. This pattern of adjacent magnetic regions having opposing magnetic polarities may be representative of magnetic regions of the first attachment feature magnets  132  and the second attachment feature magnets  134 . While a particular magnetic polarity is shown, the arrangement may be reversed for the first magnetic region  136  and the second magnetic region  138 , as well as remaining magnetic regions. Also, as previously stated, the magnetic regions may differ in size. For example, as shown, the first magnetic region  136  is smaller than that of the second magnetic region  138 . Other size differences are possible. 
     Also, as shown in  FIG. 2 , the electrical contact  116  may be disposed on, and in electrical communication with, a flexible circuit assembly  135 . Also, the attachment feature  114  may include a magnetic shunt  137  formed from a metal, including soft steel, such that the magnetic shunt  137  is magnetically attracted to the first attachment feature magnets  132  and the second attachment feature magnets  134 . Also, the magnetic shunt  137  may contain the external magnetic field of the first attachment feature magnets  132  and the second attachment feature magnets  134  in one location, and direct the magnetic fields of the first attachment feature magnets  132  and the second attachment feature magnets  134  in a direction towards magnets in an electronic device (not shown). The attachment feature  114  may further include a protective component  140  that includes a metal layer (not shown) such as stainless steel. The protective component  140  may be designed to receive the first attachment feature magnets  132 , the second attachment feature magnets  134 , the flexible circuit assembly  135 , and the magnetic shunt  137 . Also, the protective component  140  may include a coating  142  covering the protective component  140  and providing an aesthetic finish for the protective component  140 . In some embodiments, the coating  142  includes a photothermolplastic (“PTP”) material that includes polyurethane plus a thermoplastic. 
     The attachment feature  114  may further include several additional features. For example, the attachment feature  114  may include a portion of an electrically conductive fabric  144  designed to provide electrical communication path between an electronic device and the keyboard assembly  104  (shown in  FIG. 1 ). The electrically conductive fabric  144  may wrap around the protective component  140  and electrically couple with the flexible circuit assembly  135 , and continue to extend to the keyboard assembly  104 . Accordingly, the electrically conductive fabric  144  may electrically couple with the electrical contact  116 . In some embodiments, the electrically conductive fabric  144  includes a body that is electrically conductive throughout its entirety. In the embodiment shown in  FIG. 2 , the electrically conductive fabric  144  includes an electrically conductive portion  146  designed to provide the electrical communication path between the aforementioned components. Also, the second cover layer  118  may also wrap around the attachment feature  114  and the electrically conductive fabric  144  to combine with the first layer  122  and the second layer  124  and define a top surface of the attachment feature  114 . As shown, the second cover layer  118  may include an opening  148  that allow the electrical contact  116  to couple with an electrical contact of an electronic device. 
       FIG. 3  illustrates a cross sectional view of the attachment feature  114 , showing the various components of the attachment feature  114  assembled together. As shown, the coating  142  surrounds the protective component  140 . The protective component  140  is generally U-shaped, but may vary according to a desired shape of the attachment feature  114 . Also, the protective component  140  may receive a magnet  154 , which may be one of the magnets of the first attachment feature magnets  132  or the second attachment feature magnets  134  (shown in  FIG. 2 ), as well as the magnetic shunt  137 . Also, the second cover layer  118  and the electrically conductive fabric  144  may wrap around the coating  142 . Also, the second cover layer  118  may extend over an uppermost surface of the magnet  154 . The attachment feature  114  may further include an inner layer  156  designed to provide cover one or more layers, and provide an aesthetic appearance to the accessory device. The inner layer  156  may include PTP. Further, as shown, the second cover layer  118  may combine with the inner layer  156  to cover the electrically conductive fabric  144 . 
     The inner layer  156  may be adhesively secured with an upper portion of the attachment feature  114 , with the upper portion associated with an uppermost surface of the attachment feature  114  as shown in  FIG. 3 . For example, an adhesive layer  158  between the inner layer  156  and the coating  142  may partially extend only along of the coating  142 . This allows for better ease of movement of the attachment feature  114  to rotate a clockwise (in a direction denoted by an arrow  160 ) and/or counterclockwise manner (in a direction denoted by an arrow  162 ) about the adhesive layer  158 . Accordingly, the second cover layer  118  may further cover the attachment feature  114  when the attachment feature  114  is rotated clockwise, and also uncover the attachment feature  114  when the attachment feature  114  is rotated counterclockwise. Also, although not specifically shown, other features shown and described in  FIG. 3  may be adhesively secured together. 
       FIG. 4  illustrates a plan view showing the cover  102 , showing the second cover layer  118  extending to wrap around and overlay the attachment feature  114  (as shown in  FIG. 3 ). In this manner, the second cover layer  118  may provide the cover  102  with an exterior surface having a consistent finish in terms of appearance (including color) and feel (including texture and roughness), as the second cover layer  118  provides a consistent finish from the attachment feature  114  to an end of the cover  102  opposite the attachment feature  114 . While the second cover layer  118  is described as including a polymer-based material, in other embodiments, the second cover layer  118  includes leather. Generally, the second cover layer  118  may include any material capable of bending while also adhering to features of the cover  102 . 
       FIG. 5  illustrates a plan view of the accessory device  100 , showing several magnets and detection mechanisms positioned throughout the accessory device  100 . The magnets shown and described in  FIG. 5  may include dotted lines to denote the magnets are positioned between two or more layers of material. As shown, the first segment  106  and the third segment  110  (of the cover  102 ) may include first cover magnets  202  and second cover magnets  204 , respectively, with each aforementioned cover magnets including several magnetic elements. In certain folding configurations (shown and described below), the second cover magnets  204  may magnetically couple with the first cover magnets  202  such that the first segment  106  remains engaged with the third segment  110  by way of several magnetic circuits formed between the first cover magnets  202  and the second cover magnets  204 . For example, the first cover magnets  202  include a magnetic element  212  and the second cover magnets  204  include a magnetic element  222  designed to magnetically couple with the magnetic element  212  in the first segment  106 . Also, the first cover magnets  202  and the second cover magnets  204  may include adjacent magnets having magnetic polarities designed to form an external magnetic field in opposite directions, similar to a magnetic arrangement of the first attachment feature magnets  132  (shown in  FIG. 2 ). Accordingly, the magnets of the first cover magnets  202  and the second cover magnets  204  may define alternating magnetic polarities (with respect to adjacent magnets). The remaining magnets in the first cover magnets  202  and the second cover magnets  204  may include similar relationships as those described. Also, the first cover magnets  202  may include an equal as the number of magnetic elements as that of the second cover magnets  204 . 
     Also, in some folded configurations, the keyboard assembly  104  may magnetically couple with the cover  102  to retain the keyboard assembly  104  with the cover  102 . For example, the second segment  108  of the cover  102  may include third cover magnets  206  designed to magnetically couple with first keyboard magnets  208  (disposed in the keyboard assembly  104 ) when the keyboard assembly  104  is folded over and onto, or nearly onto, the cover  102 , and in particular, over and onto the first segment  106  and the second segment  108 . This will be shown below. Also, it will be appreciated that magnets in the third cover magnets  206  and the first keyboard magnets  208  may include similar relationships, such as adjacent magnetic elements having alternative magnetic polarities in a manner previously described. Further, the magnetic polarities of the magnets in the third cover magnets  206  may be opposite of corresponding magnets (forming a North-South polarity alignment between the magnetic elements) in the first keyboard magnets  208  such that several magnetic circuits are formed between magnetic elements of the third cover magnets  206  and magnets of the first keyboard magnets  208  when the keyboard assembly  104  is folded over and onto, or nearly onto, the cover  102 . This also implies that the third cover magnets  206  may include an equal as the number of magnetic elements as that of the first keyboard magnets  208 . 
     The magnetic polarities of the magnetic elements in the first attachment feature magnets  132  and the second attachment feature magnets  134  (both in the attachment feature  114 ) were previously described as having a magnetic polarity such that the first attachment feature magnets  132  and the second attachment feature magnets  134  may magnetically couple with magnets in an electronic device (not shown). However, the magnets in the first attachment feature magnets  132  and the second attachment feature magnets  134  may also magnetically couple with second cover magnets  210  disposed below the retention feature  128  of the keyboard assembly  104  when the attachment feature  114  is positioned, or nearly positioned, in the retention feature  128 . In this regard, each magnet in the first attachment feature magnets  132  and the second attachment feature magnets  134  may include a magnetic polarity to magnetically couple with a magnet in the second cover magnets  210  of magnets in the retention feature  128 . This may allow the retention feature  128  further secure the attachment feature  114  and an electronic device (not shown) coupled with the attachment feature  114 . This also implies that the combined number of magnets in the first attachment feature magnets  132  and the second attachment feature magnets  134  may equal the number of magnets in the second cover magnets  210 . 
     The accessory device  100  may include additional magnets and other associated features. For example, the accessory device  100  may include a first detection mechanism  230  in the keyboard assembly  104 . In some embodiments, the first detection mechanism  230  is a Hall Effect sensor designed to detect an external magnetic field and generate an electrical signal, in response to detecting the external magnetic field, to indicate the presence of the external magnetic field. This may indicate a structural feature that carries a magnetic that generates the external magnetic field is present. Alternatively, the first detection mechanism  230  can be designed to generate an electrical signal, in response to no longer detecting the external magnetic field, to indicate the external magnetic field is no longer present, and may indicate a structural feature that carries a magnetic that generates the external magnetic field is no longer present. In other embodiments, the first detection mechanism  230  is a mechanical switch that closes a circuit in response to detecting an external magnetic field. 
     As shown, the cover  102  includes a magnet  232  (disposed in the first segment  106 ) that generates an external magnetic field (not shown) that may be detected by the first detection mechanism  230 . For example, the first detection mechanism  230  may detect the magnet  232  (that is, the external magnetic field) when the keyboard assembly  104  is folded over and onto, or nearly onto, the cover  102 . Then, the first detection mechanism  230  may generate an electrical signal to a processor circuit (not shown) in the accessory device  100 , or an electronic device electrically coupled with the accessory device  100 , causing the keyboard assembly  104  to power down as the keyboard assembly  104  is inaccessible to as user. Conversely, when the first detection mechanism  230  no longer detects the magnet  232 , the keyboard assembly  104  may be folded away from the cover  102 , causing the first detection mechanism  230  to communicate with the aforementioned processor circuit in the accessory device  100  or in the electronic device, and generate an electrical signal resulting in the keyboard assembly  104  receiving electrical current to power on. However, it should be noted that the keyboard assembly  104  may require some electrical current to function and may receive the electrical current from the electronic device coupled with the attachment feature  114 . 
     The accessory device  100  may further include a second detection mechanism  234  in the keyboard assembly  104 . The second detection mechanism  234  may include any type of detection mechanism previously described for a detection mechanism. The second detection mechanism  234  may be used to detect an external magnetic field from a magnet (not shown) in an electronic device. For example, when the attachment feature  114  is disposed in the retention feature  128 , the second detection mechanism  234  may detect an external magnetic field emanating from the electronic device to indicate the electronic device is positioned upright with respect to the keyboard assembly  104 , and provide an electrical signal to turn the keyboard assembly  104  on. However, when the second detection mechanism  234  no longer detects the external magnetic field, the second detection mechanism  234  may provide an indication in accordance with the lack of detected external magnetic field to the aforementioned processor circuit, which may cause the keyboard assembly  104  to power down. The accessory device  100  may further include a third detection mechanism  236  in the keyboard assembly  104  designed to provide a secondary, or redundant, indication of an event or current status of the accessory device  100  in relation to an electronic device. For example, the third detection mechanism  236  may detect whether an electronic device is present and whether the keyboard assembly  104  is engaged, or nearly, engaged with the electronic device. For example, when the keyboard assembly  104  is folded onto the first segment  106  and the second segment  108 , the cover  102  may be folded onto the electronic device in a manner such that the third detection mechanism  236  detects an external magnetic field (not shown) in the electronic device. This folded configuration will be shown below. The third detection mechanism  236  may include any type of detection mechanism previously described for a detection mechanism. 
     Also, the cover  102  may include first compass magnets  242  and a second compass magnets  244 , both of which may be used to create a neutral, or offsetting, external magnetic field with respect to a magnet or magnets in an electronic device. This may be useful for an electronic device that includes a compass or magnetometer that relies upon an external magnetic field in the atmosphere to determine a direction or orientation of the electronic device. For example, the first compass magnets  242  may provide an external magnetic field that counters, or neutralizes, an external magnetic field generated by one or more magnets in the first cover magnets  202  in the first segment  106  such that the compass or magnetometer in the electronic device does not falsely determine a direction or orientation based on a magnetic field generated by one or more magnets in the first cover magnets  202 . The second compass magnets  244  may work in a similar manner to offset magnetic in the second cover magnets  204 . Also, although the various magnets and detection mechanisms shown and described in  FIG. 5  are located in discrete locations, some of the magnets may be arranged in other locations, as different arrangements may be suitable, so long as the same or substantially similar magnetic relationships are maintained. 
       FIG. 6  illustrates an isometric view of an embodiment of an electronic device  300  suitable for use with the accessory device  100  (shown in  FIG. 1 ). In some embodiments, the electronic device  300  is a mobile communications device, such as a smartphone. In the embodiment shown in  FIG. 1 , the electronic device  300  is a tablet computer device. The electronic device  300  may vary in shape and size. Also, the electronic device  300  may include an enclosure  302  designed to enclose and protect several internal components (not shown). In some embodiments, the enclosure  302  is formed from a metal, such as aluminum. Also, the electronic device  300  may include a display assembly  304  designed to present visual information to a user. In some embodiments, the display assembly  304  includes a touch sensitive layer designed to receive a touch input and generate a command, in accordance with the touch input, to a processor circuit (not shown) in the electronic device  300 . Further, in some embodiments, the display assembly  304  includes a capacitive touch sensitive layer designed to generate an input based upon a capacitive coupling with the display assembly  304 . Further, an outer protective layer  306  made from a transparent material, such as glass, may also overlay the display assembly  304 . The cover  102  (shown in  FIG. 1 ) may include a size and a shape to cover the outer protective layer  306 , and accordingly, the display assembly  304 . Also, in some embodiments, the electronic device  300  includes a force detection sensor (not shown) designed to detect an amount of force applied to the display assembly  304  and/or the outer protective layer  306 , and provide a command based upon the amount of force detected. 
     The electronic device  300  may include a button  308  designed to receive an input corresponding to a command to the electronic device  300  (for example, to change the visual information shown on the display assembly  304 ). Also, the electronic device  300  may include a charge port  310  designed to receive power from a power source (not shown) in order to supply power an internal power source that powers internal components of the electronic device  300 . The charge port  310  may also be used to provide communicate to and from the electronic device  300 . 
     The electronic device  300  may further include an electrical contact  312  designed to electrically couple with an accessory device, and in particular, an electrical contact of an accessory device, such as the electrical contact  116  of the accessory device  100  (shown in  FIG. 1 ). This may allow for electrical communication between internal components, such as processor circuits (not shown), of the electronic device  300  and an accessory device. The electronic device  300  may further include first device magnets  314  and second device magnets  316  disposed in the electronic device  300  along a sidewall of the enclosure  302 . The first device magnets  314  may include several magnets having a magnetic polarity to magnetically couple with the first attachment feature magnets  132  in the attachment feature  114  (shown in  FIG. 1 ). Similarly, the second device magnets  316  may include several magnets having a magnetic polarity to magnetically couple with the second attachment feature magnets  134  in the attachment feature  114  (also shown in  FIG. 1 ). The magnetic circuits formed by multiple magnetic couplings may allow the electronic device  300  to magnetically couple with the accessory device  100  shown in  FIG. 1 . 
     Once an accessory device is coupled with an electronic, the accessory device may be folded into several different folded configurations.  FIGS. 7-11  illustrate examples of several folded configurations of the accessory device  100  which may provide a use or benefit to a user of the electronic device  300 . Some folded configurations may provide various types of support configuration while other folded configurations provide a protective configuration. 
       FIG. 7  illustrates a side view of the accessory device  100  coupled with the electronic device  300 , with the accessory device  100  in a folded configuration to allow use of the keyboard assembly  104  with the electronic device  300 . As shown, the folded configuration may include the first segment  106 , the second segment  108 , and the third segment  110  folded to form a triangular support for the electronic device  300 . Further, the electronic device  300  may abut against the third segment  110 . In this configuration, the keyboard assembly  104  may be used to provide an input device in order to generate input or command to the electronic device  300 , and change the visual information (denoted as several diagonal lines) of the display assembly  304 . This is due in part to the electrically conductive fabric  144  (that includes the electrically conductive portion  146  in  FIG. 2 ), shown in the enlarged view, folding with the cover  102 , and extending through the cover  102 . 
       FIG. 8  illustrates an enlarged view of Section A, shown in  FIG. 7 , showing the attachment feature  114  positioned in the retention feature  128 . A partial cross sectional view of the retention feature  128  is shown to illustrate the retention feature  128  used to provide a mechanical stop for the attachment feature  114 , as the attachment feature  114  is partially disposed in the retention feature  128 . Also, as shown, the attachment feature  114  may include a magnet  240  that may be part of the first attachment feature magnets  132  or the second attachment feature magnets  134  (shown in  FIG. 2 ) magnetically coupled with a magnet  318  that may be part of the first device magnets  314  or the second device magnets  316 , respectively (shown in  FIG. 6 ). The external magnetic field is shown as dotted lines having arrows. Also, the magnet  240  in the attachment feature  114  may further be magnetically coupled with a magnet  250  (part of the second cover magnets  210  shown in  FIG. 5 ) in the keyboard assembly  104 . This magnetic coupling may, in combination with the retention feature  128 , maintain the attachment feature  114  and the electronic device  300  in a stationary position. Although not shown, the first attachment feature magnets  132  and the second attachment feature magnets  134  may provide a magnetic coupling with magnets of the first device magnets  314  and second device magnets  316 , respectively, in a manner similar to that shown in  FIG. 8 . Also, the first attachment feature magnets  132  and the second attachment feature magnets  134  may provide a magnetic coupling with magnets of the second cover magnets  210  in a manner similar to that shown in  FIG. 8 . 
       FIG. 9  illustrates a side view of the accessory device  100  coupled with the electronic device  300 , with the accessory device  100  in an alternate folded configuration to further position the electronic device  300  in an upright position. In this configuration, the first segment  106 , the second segment  108 , and the third segment  110  may again combine to form a triangular support structure. However, in this configuration, the keyboard assembly  104  is disposed behind the electronic device  300  and also used to further support the electronic device. Also, in this configuration, the keyboard assembly  104  may not be in use and a detection mechanism previously described may be used to generate an electrical signal to power down the keyboard assembly  104 . The configuration shown in  FIG. 9  may be useful when, for example, a user is watching a media file on the display assembly  304 , and the keyboard assembly  104  is not needed. Also, the keyboard assembly  104  may be magnetically coupled with the electronic device  300  by way of magnetic couplings between magnetic elements (not shown) in the electronic device  300  and the keyboard assembly  104 . 
       FIG. 10  illustrates a side view of the accessory device  100  coupled with the electronic device  300 , with the accessory device  100  in an alternate folded configuration to position the keyboard assembly  104  behind the electronic device  300 . In this configuration, the first segment  106 , the second segment  108 , and the third segment  110  may again combine to form a triangular support structure. The keyboard assembly  104  is again disposed behind the electronic device  300  and also used to further support the electronic device. Also, in this configuration, the keyboard assembly  104  may not be in use and a detection mechanism previously described may be used to generate an electrical signal to power down the keyboard assembly  104 . Also, the keyboard assembly  104  may be magnetically coupled with the electronic device  300  by magnets (previously described). The configuration shown in  FIG. 10  may be useful when, for example, a user is elevated with respect to the electronic device  300  and looking down at display assembly  304 , and/or when the keyboard assembly  104  is not needed 
       FIG. 11  illustrates a side view of the accessory device  100  coupled with the electronic device  300 , with the accessory device  100  in an alternate folded configuration behind the electronic device  300  such that the accessory device  100  supports the electronic device  300  in a horizontal position. In this configuration, the first segment  106 , the second segment  108 , and the third segment  110  are generally horizontal, with each segment providing a support for the electronic device  300 . The keyboard assembly  104  is again disposed behind the electronic device  300  and also used to further support the electronic device. Also, in this configuration, the keyboard assembly  104  may not be in use and a detection mechanism previously described may be used to generate an electrical signal to power down the keyboard assembly  104 . Also, the keyboard assembly  104  may be foldable respect to the cover  102 , and in particular, the first segment  106  and the second segment  108 . Further, the third segment  110  may be raised or elevated with respect to the first segment  106  and the second segment  108  such that when the keyboard assembly  104  is folded over and onto the first segment  106  and the second segment  108 , the keyboard assembly  104  is generally co-planar, or flush, with respect to the third segment  110 , as shown in  FIG. 11 . In this manner, the keyboard assembly  104  and the third segment  110  may combine to form a horizontal (or planar) support for the electronic device  300 , as shown in  FIG. 11 . The configuration shown in  FIG. 11  may be useful when, for example, when a user places the electronic device  300  on a lap of the user and is looking down at display assembly  304  (shown in  FIG. 6 ) of the electronic device  300 . The configuration shown in  FIG. 11  may also be useful when the user has relatively limited space, such as when sitting on an airplane or a bus. 
       FIG. 12  illustrates an isometric view of the accessory device  100  in a closed configuration, showing the accessory device  100  positioned over the display assembly (not shown) of the electronic device  300 . The accessory device  100  may be complementary with other accessory devices. For example,  FIG. 12  further shows a second accessory device  350  having a size and shape to receive the electronic device  300  and provide a protective cover around the enclosure  302 . Also, the second accessory device  350  may include an opening  352  in a sidewall of the second accessory device  350 , with the opening  352  designed to receive the attachment feature  114  and a portion of the second cover layer  118 . The second accessory device  350  may include exterior features similar to those of the accessory device  100 , such as a similar appearance (color) or feel (texture or roughness). However, the second accessory device  350  may come in various appearances and feels that may differ from those of the accessory device  100 . 
     In some embodiments, an accessory device may include a feature or features designed to limit movement of a keyboard assembly with respect to a cover. For example,  FIG. 13  illustrates a plan view of the accessory device  100 , showing a support layer  402  extending along the first segment  106  and partially onto the keyboard assembly  104 . In other embodiments, the support layer  402  extends across the second segment  108  and/or the third segment  110 . The support layer  402  may include a liquid crystal polymer fiber material. Also, the support layer  402  may include a relatively high tensile strength, similar to that of Kevlar. 
     The support layer  402  may be designed and positioned to allow movement of the keyboard assembly  104  with respect to the cover  102  in some directions, and also limit or prevent movement of the keyboard assembly  104  with respect to the cover  102 .  FIGS. 14 and 15  describe an exemplary rotational movement of the keyboard assembly  104  relative to the cover  102 , based in part on the support layer  402 .  FIG. 14  illustrates a side view of the accessory device  100 , with the keyboard assembly  104  folded over and onto the cover  102 . As shown, the support layer  402  (denoted as a dotted line) may bend with the hinge  105  to allow movement of the keyboard assembly  104  with respect to the cover  102 . 
     Conversely,  FIG. 15  illustrates a side view of the accessory device  100 , with the keyboard assembly  104  folded away from the cover  102 . As shown, a portion of the accessory device  100  is located near an edge of a surface  410  (such as a table or desk) in a manner such that when the keyboard assembly  104  is folded away from the cover  102 , as shown in  FIG. 15 , the keyboard assembly  104 , without additional support, would further fold or rotate away from the cover  102  by gravitational forces. However, the support layer  402  may provide a tension to, and limit movement of, the keyboard assembly  104  and the hinge  105  to a predetermined maximum angle  420  with respect to the cover  102 . The predetermined maximum angle may be 180 degrees, or approximately 180 degrees. Also, the predetermined maximum angle  420  also represents an angle less than what the keyboard assembly  104  would otherwise rotate without a support force (such as the surface  410 ) below the keyboard assembly  104  that would stop rotation of the keyboard assembly  104 . This may contribute to an improved user experience of the accessory device  100 , as the accessory device  100  may be less flimsy by remaining at a predetermined angle when nothing is below the keyboard assembly  104 . Also, although not shown, the support layer  402  may be pre-tensioned to change the predetermined maximum angle  420  to some other angle, for example, greater than 180 degrees. 
       FIG. 16  illustrates a cross sectional view of the accessory device  100 , showing the support layer  402  combining with other features to limit the movement of the keyboard assembly  104  with respect to the cover  102 . For example, in addition to the tensional forces provided by the support layer  402 , the second cover layer  118  may extend from the cover  102  and into the keyboard assembly  104 . Further, as shown in  FIG. 16 , the second cover layer  118  may compress in a location between the cover  102  and the keyboard assembly  104 , and a resultant counterforce by the second cover layer  118 , based on the compression, may further maintain the keyboard assembly  104  at a desired predetermined angle with respect to the cover  102 . Also,  FIG. 16  further shows the support layer  402  covered by a first layer  406  and a second layer  408  disposed on the cover  102  and the keyboard assembly  104 , respectively. The first layer  406  and the second layer  408  may be cosmetic layers that enhance an appearance of the accessory device  100 . In this regard, the first layer  406  and the second layer  408  may include a material such as microfiber. 
       FIG. 17  illustrates a cross sectional view of an alternate embodiment of an accessory device  500 , showing a support layer  552  combining with a rigid layer  520  to limit the movement of a keyboard assembly  504  with respect to a cover  502 . The accessory device  500  may include any feature or feature previously described for an accessory device. Also, the support layer  552  may be substantially similar to that of the support layer  402  (shown in  FIG. 16 ). As shown, the rigid layer  520  may include a layer of material that overlays an exterior layer  518  of the cover  502 . Also, the rigid layer  520  may include a PTP material. When the keyboard assembly  504  is folded away from the cover  502  in a manner shown in  FIG. 17 , the rigid layer  520  abuts against the exterior layer  518  in a location in which the exterior layer  518  engages the keyboard assembly  504 , thereby prevent the keyboard assembly  504  from further movement. The rigid layer  520  may be positioned in various manners based upon a desired angle between the cover  502  and the keyboard assembly  504 . 
     The keys of a keyboard assembly may provide a feedback, defined by a response of the key to a depression thereof, to a user based in part on the material or materials used to cover the keys. Generally, the feedback is the same for all keys. In some cases, however, a keyboard assembly of an accessory device may include a non-porous material that acts as an air seal to limit or prevent air movement into or out of the keyboard assembly. As a result, the feedback may differ for providing for an inconsistent or undesired user experience. 
     However, accessory devices in accordance with the described embodiments may include a keyboard assembly that allows air passage to and from the keys. For example,  FIG. 18  illustrates an interior view of an embodiment of a top portion of a keyboard assembly  604 , showing a vent system  610  distributed throughout the keyboard assembly  604  that allows passage of air into and out of the keyboard assembly  604 . For purposes of illustration and simplicity, several features of the keyboard assembly  604  are removed. The vent system  610  may include a channel, or series of channels, that opens to each of the keys (not shown) of the keyboard assembly  604 . The keyboard assembly  604  may further include a first opening  612  and a second opening  614 , both of which allow the vent system  610  open to ambient air. In this manner, the vent system  610 , by way of the first opening  612  and the second opening  614 , may relieve air pressure forming along the keys and allow the keys to remain at or near atmospheric pressure. This may include instances when the keyboard assembly  604  becomes heated (causing air expansion) or cooled (causing air contraction). 
       FIG. 19  illustrates a partial exterior view of the top portion of the keyboard assembly  604  shown in  FIG. 18 , further showing the first opening  612 . While the first opening  612  may include an opening free of obstruction (as shown in  FIG. 19 ) in other embodiments, the first opening  612  is covered with a layer of material also used to cover the keyboard assembly  604 . In this regard, the layer of material may include polyester. In other embodiments, a mesh feature covers the first opening  612 . Generally, any material having some porosity that allows air passage may cover the first opening  612 . Further, in other embodiments, the keyboard assembly  604  is laser etched to includes several lozenge, or diamond-shaped, features, in order to reduce an overall appearance of the opening as compared to the first opening  612 . The features described for the keyboard assembly  604  shown in  FIGS. 18 and 19  may be used in the keyboard assembly  104 , shown in  FIG. 1 . 
       FIG. 20  illustrates a partial plan view of an alternative embodiment of an accessory device  700  having a display assembly  704  in place of a keyboard assembly. The accessory device  700  may include any feature or feature previously described for an accessory device, with the exception of a keyboard assembly. The display assembly  704  may include similar features described for a display assembly  304  of an electronic device  300 , shown in  FIG. 6 , such as visual content display and touch screen capabilities. Also, a detection mechanism (not shown) may be used to power down the display assembly  704  in a manner previously described for powering down a keyboard assembly. The display assembly  704  may provide for a system, that is, the accessory device  700  plus an electronic device (not shown), that includes dual display capabilities. Further, the display assembly  704  can change its visual appearance to present a keyboard assembly used as an input feature by touching the display assembly  704 . 
     The various aspects, embodiments, implementations or features of the described embodiments can be used separately or in any combination. Various aspects of the described embodiments can be implemented by software, hardware or a combination of hardware and software. The described embodiments can also be embodied as computer readable code on a computer readable medium for controlling manufacturing operations or as computer readable code on a computer readable medium for controlling a manufacturing line. The computer readable medium is any data storage device that can store data which can thereafter be read by a computer system. Examples of the computer readable medium include read-only memory, random-access memory, CD-ROMs, HDDs, DVDs, magnetic tape, and optical data storage devices. The computer readable medium can also be distributed over network-coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. 
     The foregoing description, for purposes of explanation, used 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: 20180306
Publication Date: 20190528
Grant Date: 20190528
Priority Date: 20150904
Inventors: SMITH, Samuel Gilkison
COSTER, DANIEL J.
CORBIN, SEAN S.
KUNA, MELODY L.
HEGDE, SIDDHARTHA
COUSINS, Benjamin A.
MURPHY, ROBERT SEAN
Assignee: APPLE INC
CPC Classifications: [{"code": "G06F1/1681", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1681", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2200/1633", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/1656", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1628", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F1/1669", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1656", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1669", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1615", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1626", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1667", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F1/20", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2200/1633", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/1654", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2200/1633", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/1681", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1628", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F1/1654", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/20", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1656", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1669", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1615", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1669", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 58188964