PATENT DOCUMENT

Publication Number: US-11199929-B2
Application Number: US-201916506887-A
Country: US
Kind Code: B2

Title: Antireflective treatment for textured enclosure components

Abstract:
A textured enclosure component including two different types of surface features is disclosed. The two different types of surface features are differently sized. The combination of differently sized surface features provides both anti-glare and anti-reflective properties to the enclosure component.

Claims:
What is claimed is: 
     
       1. An electronic device comprising:
 a housing member at least partially defining an internal volume of the electronic device; 
 a display at least partially within the internal volume; 
 a touch sensor at least partially within the internal volume; and 
 a cover formed of a glass and coupled to the housing member, the cover defining, in an area positioned over the display:
 a first set of micro-scale features formed of the glass, the first set of micro-scale features comprising protrusions having an average height from about 500 nm to about 2 microns; and 
 a second set of nano-scale features formed into the first set of micro-scale features, the second set of nano-scale features comprising recesses having an average depth from about 5 nm to about 100 nm, the second set of nano-scale features and the first set of micro-scale features at least partially defining a glass surface. 
 
 
     
     
       2. The electronic device of  claim 1 , wherein:
 the first set of micro-scale features is configured to provide an anti-glare property to the cover; and 
 the second set of nano-scale features is configured to provide an anti-reflective property to the cover. 
 
     
     
       3. The electronic device of  claim 2 , wherein the cover has a transmittance greater than 80% over the visible spectrum of light. 
     
     
       4. The electronic device of  claim 1 , wherein:
 the cover defines a transparent region positioned over the display; 
 the display comprises pixels having a pixel size; and 
 each micro-scale feature of the first set of micro-scale features has a width less than the pixel size. 
 
     
     
       5. The electronic device of  claim 1 , wherein:
 each protrusion of the first set of micro-scale features defines a base, a peak, and an inclined surface from the base to the peak; and 
 the inclined surface has a roughness defined by the second set of nano-scale features. 
 
     
     
       6. The electronic device of  claim 5 , wherein the inclined surface defines an internal taper angle from about 90 degrees to about 120 degrees. 
     
     
       7. The electronic device of  claim 1 , further comprising a hydrophobic coating on the glass surface and on at least a portion of the protrusions and the recesses. 
     
     
       8. An electronic device comprising:
 a housing member; 
 a cover member coupled to the housing member, the cover member formed of a glass and defining, in a textured region of the cover member:
 a substrate surface; 
 a set of protrusions formed of the glass and extending outwardly from the substrate surface, each protrusion of the set of protrusions having a protrusion width greater than or equal to about 750 nm and less than about 10 microns; and
 a set of recesses formed into the set of protrusions and the substrate surface, each recess of the set of recesses having a recess width from about 5 nm to about 200 nm; and 
 
 
 a display coupled to the cover member and configured to display graphical outputs that are visible through the textured region of the cover member. 
 
     
     
       9. The electronic device of  claim 8 , wherein the set of protrusions is configured to prevent a user&#39;s finger from contacting the substrate surface. 
     
     
       10. The electronic device of  claim 8 , wherein:
 at least two adjacent protrusions of the set of protrusions are set apart from one another along the substrate surface; and 
 an average spacing of the at least two adjacent protrusions of the set of protrusions is from about 1 micron to about 20 microns. 
 
     
     
       11. The electronic device of  claim 8 , wherein each recess of the set of recesses has a recess depth from about 5 nm to about 200 nm. 
     
     
       12. The electronic device of  claim 8 , further comprising an oleophobic coating on at least a portion of the set of protrusions and the set of recesses. 
     
     
       13. The electronic device of  claim 8 , wherein the cover member is formed of a single glass material. 
     
     
       14. The electronic device of  claim 8 , wherein the textured region of the cover member has a transmittance greater than 70% over the visible spectrum of light. 
     
     
       15. The electronic device of  claim 12 , wherein the oleophobic coating comprises a fluorinated material. 
     
     
       16. A mobile phone comprising:
 a display; and 
 an enclosure at least partially surrounding the display, having an exterior surface, and comprising a cover member formed of a glass and defining, along the exterior surface:
 a set of micro-scale protrusions formed of the glass and extending from a substrate surface of the cover member, each micro-scale protrusion of the set of micro-scale protrusions defining:
 a base having a width; 
 a peak having a height above the substrate surface; and 
 an inclined surface extending from the base to the peak; and 
 
 nano-scale recesses distributed along and formed into the inclined surface of each micro-scale protrusion of the set of micro-scale protrusions, the nano-scale recesses, the inclined surfaces, and the substrate surface each defining at least a portion of a glass surface of the cover member. 
 
 
     
     
       17. The mobile phone of  claim 16 , wherein:
 each micro-scale protrusion of the set of micro-scale protrusions has a width from about 1 micron to about 10 microns; and 
 each of the nano-scale recesses has a width from about 5 nm to about 100 nm. 
 
     
     
       18. The mobile phone of  claim 16 , wherein an average height of the set of micro-scale protrusions is from about 500 nm to about 5 microns. 
     
     
       19. The mobile phone of  claim 16 , wherein the inclined surface defines a convex shape. 
     
     
       20. The mobile phone of  claim 16 , wherein the exterior surface of the enclosure defines a touch-sensitive input surface.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a non-provisional patent application of and claims the benefit of U.S. Provisional Patent Application 62/821,872, filed Mar. 21, 2019 and titled “Antireflective Treatment for Textured Glass,” the disclosure of which is hereby incorporated by reference in its entirety. 
    
    
     FIELD 
     The described embodiments relate generally to textured enclosure components for electronic devices. More particularly, the present embodiments relate to forming a texture including at least two different sizes of surface features on the enclosure component. 
     BACKGROUND 
     Electronic devices may include a glass cover over a display, camera, or other device component. For some electronic devices, the glass cover may be treated to reduce reflections and/or glare from lighting sources external to the electronic device or to otherwise tune the optical properties of the glass cover. In some cases, different types of treatments may be required in order to produce anti-glare properties and anti-reflective properties. 
     SUMMARY 
     Aspects described herein relate to a textured enclosure component for an electronic device which includes two different types of surface features, the two different types of surface features being differently sized. The combination of differently sized surface features may provide both anti-glare and anti-reflective properties to the enclosure component. In embodiments, smaller surface features are distributed along larger surface features. 
     By the way of example, the enclosure component may be a cover, an input structure, or other form of enclosure component. The enclosure component may comprise a glass member such as a glass cover member. In embodiments, at least a portion of the enclosure component is transparent to light in the visible spectrum. 
     In some embodiments, an electronic device comprises a housing member at least partially defining an internal volume of the electronic device, a display at least partially within the internal volume, a display at least partially within the internal volume, and a glass cover. The glass cover is positioned over the display, coupled to the housing member, and defines a set of micro-scale features formed on the glass cover and a set of nano-scale features formed on the set of micro-scale features. 
     In further embodiments, the glass cover defines a transparent region positioned over the display. The set of micro-scale features may be formed along the transparent region and the transparent region may define a touch-sensitive input surface of the electronic device. 
     In some embodiments, an electronic device comprises a housing component, a glass member coupled to the housing component and comprising a textured region, and a display coupled to the glass member and configured to display graphical outputs that are visible through the textured region of the glass member. The textured region defines a substrate surface, a set of protrusions extending outwardly from the substrate surface, each protrusion of the set of protrusions having a width greater than or equal to about 750 nm and less than about 10 microns, and a set of recesses distributed over the set of protrusions and the substrate surface, each recess of the set of recesses having a width from about 5 nm to about 200 nm. 
     In some embodiments, a mobile phone comprises a display and an enclosure at least partially surrounding the display, having an exterior surface, and comprising a glass member. The glass member defines, along the exterior surface, a set of micro-scale protrusions extending from a substrate surface of the glass member, each micro-scale protrusion of the set of micro-scale protrusions defining a base having a width, a peak having a height above the substrate surface, and an inclined surface side extending from the base to the peak. The glass member further defines nano-scale features distributed along the inclined surface of each of the set of micro-scale features. 
    
    
     
       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  shows a front view of an example electronic device including a textured enclosure component. 
         FIG. 1B  shows a back view of an example electronic device. 
         FIG. 2  shows a cross-sectional view of an electronic device. 
         FIG. 3  shows a detail view of an example textured enclosure component. 
         FIG. 4  shows a cross-section view of a textured enclosure component. 
         FIGS. 5A and 5B  show detail views of an example textured enclosure component. 
         FIG. 6  shows a detail view of another example textured enclosure component. 
         FIG. 7  shows an example cross-section view of a textured enclosure component. 
         FIG. 8  shows a cross-section view of an additional example of a textured enclosure component. 
         FIG. 9  shows a cross-section view of a further example of a textured enclosure component. 
         FIG. 10  shows a cross-section view of another example of a textured enclosure component. 
         FIG. 11  shows a flow chart of a process for making a textured enclosure component for an electronic device. 
         FIGS. 12A, 12B, 12C, and 12D  show various stages in the process of making a textured enclosure component. 
         FIG. 13  shows a block diagram of a sample electronic device that can incorporate a textured enclosure component. 
     
    
    
     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 
     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 implementation. To the contrary, the described embodiments are intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the disclosure and as defined by the appended claims. 
     The following disclosure relates to textured enclosure components and electronic devices including such enclosure components. For example, the textured enclosure component may be a cover, an input structure, a camera or sensor window, or the like. The textured enclosure component may have a transparent region. 
     Electronic devices may benefit from certain optical properties, such as anti-reflective properties and anti-glare properties. Conventional treatments to provide anti-reflective properties may include forming a single layer coating over the transparent region (e.g., a quarter-wavelength coating). However, single layer coatings may reduce reflectivity only for a limited range of wavelengths and incidence angles. Multi-layer coatings can be used to increase the wavelength range, but require additional processing steps. Conventional treatments to provide anti-glare properties may include texturing of the surface of the transparent region. 
     Aspects of the disclosure relate to enclosure components having a dual-textured surface that provides both anti-reflective and anti-glare properties along at least a portion of the exterior surface of the electronic device. For example, the enclosure component may include a first texture defined by first surface features and a second texture defined by second surface features. The two types of surface features are differently sized and can provide different optical properties to the enclosure component. The enclosure component may comprise a glass member and the first texture and the second texture may be formed into and/or on the glass member. 
     Enclosure components having the optical properties described herein may define first surface features and second surface features, with the first surface features having a larger size than the second surface features and the second surface features located along the first surface features (e.g., the smaller features are located on the surfaces of the larger first surface features, as well as between the first surface features). In embodiments, the first surface features are configured to provide an anti-glare property and the second surface features are configured to provide an anti-reflective property. For example, the second surface features (e.g., nano-scale recesses along the glass surface) may provide an effective index of refraction that reduces the amount of light reflected from the surface. At the same time, the first surface features (e.g., raised features adding a surface roughness) may diffuse or scatter light reflected from the surface of the enclosure component, reducing glare and improving the ability to see through the enclosure component under certain lighting conditions. The combination of differently sized surface features may provide both anti-glare and anti-reflective properties to the enclosure component, and may eliminate the need for conventional anti-reflective treatments such as coatings or films that may reduce reflectivity for more limited ranges of wavelengths and incidence angles. 
     As previously discussed, the first surface features, which may be a first set of features, may provide an anti-glare property to the enclosure member. For example, the surface features may diffuse or scatter light reflected from an external lighting source. As a result, a reflected image from an enclosure component including the first surface features may have a coherency less than that of an enclosure component without these features. Further, the ambient contrast ratio may be increased relative to that of an enclosure component without these features. In embodiments, the anti-glare effect provided by the first surface features does not unduly reduce the distinctness of image (DOI). 
     In addition, the second surface features, which may be a second set of features, may provide an anti-reflection property to the enclosure member. By the way of example, the second surface features may provide a broadband anti-reflection property over the spectrum of visible light. The second surface features may be configured to provide an effective index of refraction or configured to provide a graded refractive index (GRIN) structure. As a result, the amount of light reflected from an enclosure component that includes the second set of features may be less than that of an enclosure component without these features, thereby improving optical performance of the treated enclosure component. Similarly, the amount of light transmitted through the treated enclosure component may be greater than that of an enclosure component without these features. 
     As described herein, the shapes and/or sizes of the first surface features and the second surface features may differ from one another. In embodiments, the enclosure component defines a substrate surface and the first surface features have the form of protrusions which extend outwardly from the substrate surface. The second surface features may be distributed along the first surface features and may take the form of recesses, projections, and so forth. In embodiments, the first surface features may be referred to as a first set of surface features and/or the second set of surface features may be referred to as a second set of surface features. 
     The first surface features may have a size greater than the longest wavelength of visible light (e.g., greater than about 750 nm). The first surface features may be micro-scale features. As used herein, micro-scale may refer to sizes from about 1 micron to about 1 mm (typically less than 1 mm). The first surface features may have a width from about 750 nm to less than about 25 microns, greater than or equal to about 750 nm and less than about 10 microns, from about 1 micron to about 25 microns, from about 1 micron to about 10 microns, or from about 1 micron to about 5 microns. The first surface features may have a height from about 200 nm to about 2 microns, from about 200 nm to about 1 micron, or from about 500 nm to about 5 microns. In further embodiments, each of the first surface features has a width less than a pixel size of a display or a sensor underlying the cover to limit distortion of the pixels as viewed through the enclosure component. The first surface features may also be described by an average width and an average height (or a median or mean width or height), with the average width falling within these width ranges and/or the average height falling within these height ranges. Further, the first surface features may define a surface roughness. 
     The second surface features may have a size less than the shortest wavelength of visible light (e.g., less than about 380 nm). In some cases, the second surface features are nano-scale features. As used herein, nano-scale may refer to sizes from about 1 nm to about 1 micron (typically less than 1 micron). The second surface features may have a width from about 5 nm to about 200 nm, from about 5 nm to about 100 nm, from about 5 nm to about 50 nm, or from about 5 nm to about 25 nm. The second surface features may have a depth from about 5 nm to about 100 nm, from about 5 nm to about 50 nm, or from about 5 nm to about 25 nm. The second surface features may also be described by an average width and an average height (or a median or mean width or height). Further, the second surface features may define a surface roughness. 
     Also described herein are processes for making textured enclosure components. An example of such a process may comprise an operation of forming the first surface features on the enclosure component and an operation of forming the second surface features on the enclosure component. The process may optionally include an operation of chemically strengthening the enclosure component and/or an operation of applying an oleophobic coating to a least a portion of the first surface features and the second surface features. 
     These and other embodiments are discussed below with reference to  FIGS. 1A-13 . 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. 1A  shows a front view of an electronic device  100 . The electronic device  100  defines a front surface  102  and a side surface  106 . The electronic device  100  includes an enclosure  110 , which includes an enclosure component  112 . As shown in  FIG. 1A , the front surface  102  is defined, at least in part, by the enclosure component  112 . For example, the enclosure component  112  may be a cover, an input structure, a window, and so on. 
     The enclosure component  112  may define a textured region  120 . For example, the textured region  120  may extend over a front surface of the enclosure component  112  or a window portion of the enclosure component  112 .  FIGS. 3 and 6  provide examples of surface textures within Detail  1 - 1 , which is located within textured region  120 . 
     The electronic device  100  further includes a display  160 . The display  160  is positioned below the enclosure component  112  and is indicated by a dashed line. The textured region  120  of the enclosure component  112  may extend over the display  160 . The textured region  120  may be transparent to light in the visible spectrum. 
     In embodiments, the enclosure component  112  may form part or all of the enclosure  110 . In embodiments, the enclosure  110  may include both a front and a rear cover (e.g., one or both of which may be formed of or include glass), with each being separate enclosure components. In further embodiments, the enclosure component  112  may be a single monolithic component (e.g., a single piece of glass) which defines a back cover and a housing or a front cover, a back cover, and a housing. In some cases, the enclosure component  112  may define substantially the entire front surface of a device as well as a portion (or all) of a surrounding sidewall or side of the device. The enclosure component  112  may also define substantially the entire rear surface of the device as well as a portion (or all) of a surrounding sidewall or side of the device. Likewise, the enclosure component  112  may define front, rear, and sides of a device. 
       FIG. 1B  shows a rear view of the electronic device  100  having a rear surface  104 . The side surface  106  is also shown. As shown in  FIG. 1B , the rear surface  104  may be defined, at least in part, by an enclosure component  114 . 
     In embodiments, an enclosure component, such as the enclosure component  112  and/or  114  may comprise, consist essentially of, or consist of a glass member, such as a sheet of glass (e.g., a flat glass sheet or a contoured or shaped glass sheet). For example, the enclosure component  112  may comprise a glass member which at least partially defines the textured region  120 . Examples of glass members are shown in the more detailed views of  FIGS. 3-10 . 
     The textured region  120  may be formed into the glass member and/or may be formed on the glass member. Processes for forming a textured region of a glass member are described with respect to  FIG. 11  and that description is generally applicable herein. In additional embodiments, the enclosure component  112  and/or  114  may comprise, consist essentially of, or consist of a glass ceramic or ceramic member and the textured region  120  may be formed into the glass ceramic or ceramic member. 
     In some cases an enclosure component (e.g., the enclosure component  112  and/or  114 ) may be formed from multiple layers that include one or more glass sheets, polymer sheets, glass ceramic sheets, ceramic sheets, and/or various coatings and layers. By the way of example, coatings may be organic (e.g., an organic polymer), inorganic (e.g., a metal or a ceramic), or combinations thereof. In embodiments, the enclosure components as described herein are thin, typically less than 5 mm in thickness, and more typically less than 3 mm in thickness. In some aspects, the enclosure component can be from about 0.1 mm to 2 mm in thickness, and more typically from 0.15 mm to 1 mm in thickness. 
     An outer layer of the enclosure component may be formed by a coating having hydrophobic and/or oleophobic properties. For example, the coating may comprise a fluorinated material, such as a fluorinated oligomer or polymer, to impart oleophobic and/or hydrophobic properties. For example, the contact angle of an oil on the coating may be greater than or equal to about 65 degrees or about 70 degrees. As an additional example, the contact angle of water on the coating may be greater than or equal to 90 degrees. The fluorinated material may comprise a linear (non-branched) fluorinated molecule such as a linear fluorinated oligomer or a linear fluorinated polymer. In embodiments, the coating of the fluorinated material has a thickness from 5 nm to 20 nm or from 10 nm to 50 nm. The coating may be bonded directly to the surface features or may be bonded to an intermediate adhesion layer which is bonded directly to the surface features. In addition or alternatively, the coating may also be provided over parts of the enclosure that aren&#39;t textured. 
     The enclosure  110  may further includes an additional enclosure component  116  and the side surface  106  may be defined, at least in part, by the enclosure component  116 . For example, the enclosure component  116  may be a housing member. The enclosure component  112  and the enclosure component  114  may be coupled to the housing member using a fastener or fastening technique. For example, the front enclosure component  112  may be coupled to the housing member  116  using an adhesive, an engagement feature, a fastener, or a combination of any of these. As examples, the housing member  116  may include one or more metal members or one or more glass members. In one example, the side surface  106  is formed from a series of metal segments that are separated by polymer or dielectric segments that provide electrical isolation between adjacent metal segments. As additional examples, the side surface  106  may be defined by one or more glass members, glass ceramic members, or members including a glass and a glass ceramic. 
     In some embodiments, the electronic device  100  may be a mobile phone, a notebook computing device (e.g., a notebook), a tablet computing device (e.g., a tablet), a portable media player, a wearable device, or another type of portable electronic device. The electronic device  100  may also be a desktop computer system, computer component, input device, appliance, or virtually any other type of electronic product or device component. 
       FIG. 2  shows an example cross-section view of an electronic device  200 . The electronic device  200  may be an example of the electronic device  100  (sectioned along A-A). As shown in  FIG. 2 , the enclosure  210  defines an internal volume  280  of the electronic device  200 . The enclosure  210  includes an enclosure component  212  which defines, at least in part, the front surface  202  of the electronic device  200 . As shown in  FIG. 2 , enclosure component  212  has the form of a front cover. The enclosure  210  also includes enclosure component  214  which defines, at least in part, the rear surface  204  of the electronic device  200 . Housing component  216  defines, at least in part, the side surface  206  of the electronic device  200 . 
     In embodiments, the enclosure  210  may at least partially surround and/or enclose a display  260  that is positioned at least partially within the internal volume  280 . As shown in  FIG. 2 , the enclosure component  212  is positioned over the display  260 . Display  260  is configured to produce a graphical output that is viewable through a transparent window region  208  of the enclosure  210  (and particularly, in the depicted example, the enclosure component  212 ). A touch sensitive layer  270  may also be positioned at least partially within internal volume  280 . In some instances, the touch-sensitive layer  270  (e.g., a capacitive touch sensor or one or more components of a capacitive touch sensor) is attached to the enclosure component  212  and positioned between the enclosure component  212  and the display  260 . The touch-sensitive layer  270  may define, along a surface of the enclosure  210 , a touch-sensitive input surface. For example, the portion of the enclosure  210  that defines a transparent window region  208  that is positioned over a display  260  may also define the touch-sensitive input surface. 
     In embodiments, a display may be characterized by a size of the individual pixels of the display. In embodiments, a pixel size may be determined from the number of pixels per distance (e.g., pixels per inch) of the display. For example, the pixels of a display having 500 pixels per inch may have a pixel size of about 50 microns. In additional embodiments, a sensor, such as an image sensor, may also be characterized by a pixel size of the sensor. 
     At least a portion of the enclosure component  212 , such as transparent window region  208 , is transparent to light in the visible spectrum. In embodiments, a transparent window region  208  has transmittance greater than or equal to 70%, 80%, or 90% over the visible spectrum of light. The transmittance may be integrated over the visible spectrum. As previously discussed, the transparent window region  208  may have a dual-textured surface that provides both anti-reflective and anti-glare properties. For example, the transparent window region  208  may define first surface features and second surface features, with the first surface features configured to provide an anti-glare property and the second surface features configured to provide an anti-reflective property. The transparent window region  208  may be positioned over an active area of the display  260  so that a graphical output of the display is visible through the transparent window region  208 . In some embodiments, an inactive area of the display is positioned outside the transparent window region  208 . 
     The enclosure components  212  and  214  may define a portion or all of the internal volume or cavity  280  of the electronic device  200  that is configured to receive the various electronic components of the electronic device  200 . The housing component  216  may further define a portion of the internal volume  280 . A variety of electronic device components may be positioned within the enclosure  210 . For example, the electronic device  200  may comprise one or more of a display, memory, a processor, control circuitry, a battery, an input device, an output device, a communication port, an accessory (e.g., a camera), and a sensor. Components of a sample electronic device are discussed in more detail below with respect to  FIG. 13 . 
     While some of the following embodiments are described with respect to an enclosure component including a glass member, such as a glass cover, the same or similar principles may be applied to any enclosure component that defines a portion of an external surface of a device. As previously described, an enclosure component may be formed from multiple layers that include one or more glass sheets, polymer sheets, glass ceramic sheets, ceramic sheets, and/or various coatings and layers. 
       FIG. 3  shows a detail view of a portion of a textured enclosure component  312 . Enclosure component  312  may be an example of enclosure component  112  in detail area  1 - 1  of  FIG. 1A . The textured region  320  of the textured enclosure component  312  includes two different types of surface features: first surface features  330  (e.g.,  330   a  and  330   b ) and second surface features  340 . The first surface features  330  typically have a size, such as a width, which is greater than that of the second surface features  340 . In some cases the first surface features have a distribution of sizes, such as a width distribution. 
     The textured enclosure component  312  includes a textured glass member  352 . The first surface features  330  (e.g.,  330   a ,  330   b ) and second surface features  340  may be formed in and/or on the glass member  352  as shown in the cross-section views of  FIGS. 4, 5A, and 5B . In some embodiments, the thickness of any surface coating on the textured glass member  352  is thin relative to the dimensions of at least the first surface features  330 . 
     As shown in  FIG. 3 , the first surface features  330  may extend outwardly (or protrude) from the substrate surface  322 . Each of the first surface features  330  defines a base that defines a polygonal contour and an inclined surface extending generally outward from the base and defining a side surface of the first surface feature  330  (the inclined surface  426  is shown in the cross-section view of  FIG. 4 ). The first surface features  330  include at least a portion of a pyramid. As shown in  FIG. 3 , the inclined surface defines facets. 
     It should be appreciated, however, that the first surface features  330  may define any suitable surface contour and shape. For example, the first surface features  330  may define any of a range of shapes or configurations which can produce an anti-glare effect, such as by diffusing or scattering light reflected from the surface of the enclosure component. For example, the first surface features  330  may define a circular, oval, polygonal, rectangular, or irregular surface contour. Furthermore, first surface features  330  may define protrusions or recesses and may have any suitable shape and may be pyramidal, conical, cylindrical, arched, have a curved upper surface or a frustum of a shape such as a cone, and so on. Further, while the edges and inclined surfaces of the surface features  330  are depicted as having straight edges and planar surfaces, they may instead have discontinuities or other irregularities. Nevertheless, the edges and surfaces may be generally distinguishable or have distinctive features even if they are not exactly planar, straight, flat, or the like. More detailed views of examples of the first surface features  330  are shown in  FIGS. 4 and 5A-5B . 
     In embodiments, at least two adjacent first surface features  330  are set apart from one another along the substrate surface  322  such that a span of the substrate surface  322  is exposed between the adjacent first surface features  330 . The first surface features  330  on an enclosure component may have an average “pitch” (e.g., separation distance). As referred to herein, the pitch is the distance between the centers of two surface features, such as the first surface features  330 . In some cases, adjacent first surface features may abut one another or even merge into one another. In other cases, the separation distance between two adjacent first surface features may be greater than the average pitch. Therefore, there may be a distribution of pitch values. In embodiments, the average pitch is micro-scale. As noted above, micro-scale may refer to sizes from about 1 micron to about 1 mm (typically less than 1 mm). For example, when the first surface features are protrusions, an average, mean, or median spacing of adjacent protrusions of a set of protrusions (e.g., the pitch of the features) may be from about 1 micron to about 20 microns. In some cases, the first surface features  330  are configured to prevent a user&#39;s finger from contacting the substrate surface  322  or otherwise to reduce the surface area of contact between the user&#39;s finger and the textured region of the enclosure component  312 , such as under typical use conditions. 
     The second surface features  340  are schematically shown with stippling. These surface features may provide a different function or property than the first surface features  330 , and as such have a different configuration (e.g., size, shape, etc.). For example, the second surface features  340  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  340 ) and therefore produce an anti-reflective effect. By providing both the first surface features  330  and the second surface features  340  in the same areas, and with the second surface features  340  on and between the first surface features  330 , both anti-reflective and anti-glare properties may be achieved on a transparent surface. More detailed views of examples of the second surface features  340  are shown in  FIGS. 4 and 5A-5B . 
     Adjacent second surface features  340  may also be set apart from each other. The second surface features  340  on an enclosure component may also have an average “pitch” (e.g., separation distance). In embodiments, the average pitch between the second surface features  340  is nano-scale. As noted above, nano-scale may refer to sizes from about 1 nm to about 1 micron (typically less than 1 micron). 
       FIG. 4  shows a cross-section view of a textured enclosure component  412 . The textured enclosure component  412  may be an example of the textured enclosure component  312  of  FIG. 3  (sectioned along B-B). The textured enclosure component  412  includes a textured glass member  452 . The glass member  452  defines, in a textured region  420  of the glass member  452 , a substrate surface  422  and first surface features  430  (e.g.,  430   a ,  430   b ) in the form of protrusions that extend outwardly from the substrate surface  422 . The textured region  420  further comprises second surface features  440  distributed over the first surface features  430  and the substrate surface  422 . As shown in  FIG. 4 , the substrate surface  422  may define a plane between first surface features  430  (e.g., as defined by the portion of substrate surface  422  between the recesses  440 ). 
     As shown in  FIG. 4 , the first surface features  430  have a base  424  having a width W 1  (also referred to as a protrusion width), a peak  428  having a height H 1  (also referred to as a protrusion height) above the substrate surface  422 , and an inclined surface  426  extending from the base  424  to the peak  428 . As previously discussed, the first surface features  430  may have a micro-scale width, a width from about 750 nm to less than about 25 microns, greater than or equal to about 750 nm and less than about 10 microns, from about 1 micron to about 25 microns, from about 1 micron to about 10 microns, or from about 1 micron to about 5 microns. In addition, the first surface features  430  may have a width less than a pixel size of a display or a sensor underlying the enclosure component. As previously discussed, the first surface features  430  may be configured to diffuse or scatter reflected light. 
     The inclined surface  426  may define an obtuse angle with respect to substrate surface  422  (and an acute internal angle). The inclined surface  426  further defines an internal taper angle θ of the first surface features  430 . As shown in  FIG. 4 , the internal taper angle θ is acute. More generally, the internal taper angle θ may be oblique, acute, right, or obtuse. By the way of example, the internal taper angle θ may be from about 60 degrees to about 180 degrees, from about 60 degrees to about 120 degrees, or from about 110 degrees to about 170 degrees. 
     As shown in  FIG. 4 , the inclined surface  426  defines a generally planar portion (e.g., as defined by the portion of inclined surface  426  between the recesses  440 ). It should be appreciated, however, that the inclined surface  426  may define any suitable shape, and may define a shape that is curved, rounded, multi-faceted, stepped (e.g., a given facet may include one or more steps), and the like. When the inclined surface is multi-faceted, the number of facets on any given inclined surfaces may differ. 
     As shown in  FIG. 4 , the second surface features  440  have the form of recesses. The recesses may be somewhat irregular in shape, as shown in  FIG. 4 , or may be generally regular in shape. For example, the second surface features  440  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  440 ) and therefore produce an anti-reflective effect. As previously discussed, the second surface features  440  may have a nano-scale surface width, a width from about 5 nm to about 200 nm, from about 5 nm to about 100 nm, from about 5 nm to about 50 nm, or from about 5 nm to about 25 nm. 
       FIG. 5A  shows a detail view of a textured glass member  552   a . The textured glass member  552   a  may be an example of the textured glass member  452  of  FIG. 4 . As shown in  FIG. 5A , the second surface features  540   a  have the shape of recesses formed into the inclined surface  526   a  of the larger first surface feature  530   a . In embodiments, the recesses may be characterized as having a width W 2  (also referred to as a recess width). Further the recesses may be characterized as having a depth D 2  (also referred to as a recess depth). In embodiments, recesses may be formed into the inclined surface  526   a  using an etching or an imprinting technique, as explained in further detail with respect to  FIG. 11 . 
       FIG. 5B  a detail view of a textured glass member  552   b . The textured glass member  552   b  may be an example of the textured glass member  452  of  FIG. 4 .  FIG. 5B  shows a further example of the second surface features  540   b  that may be formed along an inclined surface  526   b  of the larger first surface feature  530   b . As shown in  FIG. 5B , the second surface features  540   b  have the form of particles bonded to the inclined surface  526   b . The particles may be characterized by a width W 3 , which may be a diameter. As shown in  FIG. 5B , the particles may form a layer  542  having a thickness T 1 . In embodiments, particles such as silica particles may be bonded to the inclined surface  526   b  using a sol-gel technique, as explained in further detail with respect to  FIG. 11 . 
     Although  FIGS. 5A and 5B  show example shapes of the second surface features  540   a  and  540   b , it should be appreciated that the second surface features may define any suitable shape. In embodiments, the second surface features may define recesses, projections, particles, or combinations thereof. In embodiments, the inclined surface has a roughness defined by the smaller surface features. 
     For example, the second surface features, such as  540   a  and  540   b , may define any of a range of shapes or configurations which can produce an anti-reflective effect. For example, the second surface features  540   a  and  540   b  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  540   a  and  540   b ) and therefore produce an anti-reflective effect. As previously discussed, the second surface features (e.g.,  540   a  and  540   b ) may have a nano-scale width (e.g., at an inclined surface or at a substrate surface), a width from about 5 nm to about 100 nm, from about 5 nm to about 50 nm, or from about 5 nm to about 25 nm. 
       FIG. 6  shows a detail view of a textured enclosure component  612 . The enclosure component  612  may be another example of enclosure component  112  in detail area  1 - 1  of FIG.  1 A. The textured region  620  of the enclosure component  612  includes first surface features  630  (e.g.,  630   a  and  630   b ) and second surface features  640 . 
     The textured enclosure component  612  includes a textured glass member  652 . The first surface features  630  (e.g.,  630   a ,  630   b ) and second surface features  640  may be formed in the glass member  652 , as shown in the cross-section views of  FIGS. 7-9 , or on the glass member  652  as shown in  FIG. 10 . 
     The first surface features  630  may extend outwardly from the substrate surface  622 . Each of the first surface features  630  has a base which defines a generally circular contour and an inclined surface extending generally outward from the base and defining a side surface of the first surface feature  630  (the inclined surface  726  is shown in the cross-section view of  FIG. 7 ). In addition, the first surface features  630  include a portion of a cone. The first surface features  630  may be configured to diffuse or scatter light reflected from the surface of the enclosure component and therefore produce an anti-glare effect. 
     The second surface features  640 , which are smaller than the first surface features  630 , are schematically shown with stippling. These surface features may provide a different function than the first surface features  630 , and as such have a different configuration (e.g., size, shape, etc.). For example, the second surface features  640  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  640 ) and therefore produce an anti-reflective effect. 
       FIG. 7  shows an example cross-section view of a textured enclosure component  712 . The textured enclosure component  712  may be an example of the textured enclosure component  612  of  FIG. 6  (sectioned along C-C). The textured enclosure component  712  includes a textured glass member  752 . 
     The textured region  720  of the glass member  752  defines a substrate surface  722  and first surface features  730  (e.g.,  730   a ,  730   b ) in the form of protrusions that extend outwardly from the substrate surface  722 . The first surface features  730  define a base  724 , a peak  728 , and an inclined surface  726  which extends from the base  724  towards the peak  728 . The first surface features  730  may be configured to diffuse or scatter light reflected from the surface of the enclosure component and therefore produce an anti-glare effect. 
     The textured region  720  further comprises second surface features  740  in the form of recesses distributed over the first surface features  730  and the substrate surface  722 . As shown in  FIG. 7 , the second surface features  740  have the form of recesses and are generally regular in shape. 
     The second surface features  740  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  740 ) and therefore produce an anti-reflective effect. As previously discussed, the second surface features may have a nano-scale surface width. 
       FIG. 8  shows a cross-section view of an additional example of a textured enclosure component  812 . The textured enclosure component  812  includes a textured glass member  852 . The textured region  820  of the glass member  852  defines a substrate surface  822  and first surface features  830  in the form of protrusions which extend outwardly from the substrate surface  822 . The first surface features  830  define a base  824 , a top  828 , and a curved surface  826  that extends from the base  824  towards the peak  828 . The curved surface  826  has a convex shape. The textured glass member  852  further includes second surface features  840 , which are smaller than first surface features  830  and may be shaped and sized as previously described with respect to  FIGS. 3-7 . 
     The first surface features  830  may be configured to diffuse or scatter light reflected from the surface of the enclosure component  812  and therefore produce an anti-glare effect. The second surface features  840  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  840 ) and therefore produce an anti-reflective effect. 
       FIG. 9  shows a cross-section view of a further example of a textured enclosure component  912 . The textured enclosure component  912  includes a textured glass member  952 . The textured region  920  of the glass member  952  defines first surface features  930  in the form of protrusions and surfaces  922  between the protrusions. Each of the first surface features  930  defines a top  928 . In contrast to the shapes of  FIG. 8 , the tops  928  of adjacent first surface features  930  are joined by surface  922  that is curved and has a concave shape. Alternately, the surfaces  922  may be viewed as defining recesses. The textured glass member  952  further includes second surface features  940 , which are smaller than first surface features  930  and may be shaped and sized as previously described with respect to  FIGS. 3-7 . 
     The first surface features  930  may be configured to diffuse or scatter light reflected from the surface of the enclosure component  912  and therefore produce an anti-glare effect. The second surface features  940  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  940 ) and therefore produce an anti-reflective effect. 
       FIG. 10  shows a cross-section view of another example of a textured enclosure component  1012 . The enclosure component  1012  includes a glass member  1052  and a coating layer  1062 , with the first surface features  1030  and second surface features  1040  formed into coating layer  1062 . By the way of example, the coating layer  1062  may be formed via a sol-gel process and may comprise silica. In embodiments, the first surface features  1030  may be formed by shaping the coating layer  1062  as described with respect to operation  1102  of  FIG. 11 . The second surface features  1040  may be formed as described with respect to operation  1104  of  FIG. 11 . A portion  1032  of the coating layer  1062  may be present between adjacent first surface features  1030 . 
     The first surface features  1030  may be configured to diffuse or scatter light reflected from the surface of the enclosure component  1012  and therefore produce an anti-glare effect. The second surface features  1040  may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features  1040 ) and therefore produce an anti-reflective effect. 
     In additional aspects, the disclosure provides processes for making textured enclosure components for electronic devices, in particular dual-textured enclosure components. In embodiments, the processes include an operation of forming a first texture including first surface features and an operation of forming a second texture including a second surface features. As previously described, the first surface features may have a size, such as a width, larger than the second surface features. For example, the first texture may be a micro-scale texture and the second texture may be a nano-scale texture. 
     As previously described, the first surface features of the first texture may be configured to diffuse or scatter light reflected from the surface of the enclosure component and therefore produce an anti-glare effect. The second surface features of the second texture may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features) and therefore produce an anti-reflective effect. 
       FIG. 11  shows a flow chart of a process  1100  for making a textured enclosure component for an electronic device. In embodiments, an enclosure component may comprise a glass material, a glass ceramic material, or combinations thereof. For example, the enclosure component may comprise a glass member or a glass ceramic member. Further, the enclosure component may be formed from one or more glass sheets, polymer sheets, glass ceramic sheets, ceramic sheets, and/or various coatings and layers. 
     In embodiments, the glass material and/or glass ceramic material is ion-exchangeable. Ion-exchangeable glasses include, but are not limited to, soda lime glasses, aluminosilicate glasses, and aluminoboro silicate glasses. 
     As shown in  FIG. 11 , the process  1100  comprises an operation  1102  of forming a micro-scale texture (or micro-texture) along a surface of an enclosure component. For example, the micro-scale texture may be formed along an exterior surface of the enclosure component. The micro-scale texture may be formed in and/or on an exterior surface of a glass member of the enclosure component as schematically illustrated in  FIGS. 12A-12D . 
     The micro-texture may include first surface features having a size from 1 micron to less than 1 mm. For example, the first surface features may have a micro-scale width (e.g., as measured between the two furthest points of a base of the feature), and/or a micro-scale height (measured from a substrate surface to a peak of the feature). The first surface features may have a width from about 750 nm to less than about 25 microns, greater than or equal to about 750 nm and less than about 10 microns, from about 1 micron to about 25 microns, from about 1 micron to about 10 microns, or from about 1 micron to about 5 microns. The first surface features may have a height from about 200 nm to about 2 microns, from about 200 nm to about 1 micron, or from about 500 nm to about 5 microns. The first surface features may also be characterized by an average “pitch” (e.g., separation distance). In some cases, the average pitch is micro-scale, such as from about 1 micron to about 25 microns, microns from about 1 micron to about 20 microns, from about 1 micron to about 10 microns, or from about 1 micron to about 5. In further embodiments, each of the first surface features has a width less than a pixel size of a display or a sensor underlying the cover to limit distortion of the pixels as viewed through the enclosure component. 
     The first surface features may define any of a range of shapes or configurations which can produce an anti-glare effect, such as by diffusing or scattering light reflected from the surface of the enclosure component. The first surface features may have any of the shapes described with respect to  FIGS. 3-10 . As previously described, the micro-scale features may protrude outward or be recessed inward from a substrate surface. 
     In embodiments, the operation  1102  comprises removing a portion of the enclosure component. The operation  1102  may comprise removing a portion of a member, such as a glass member, of the enclosure component (as illustrated by  FIGS. 12A-12B ). Techniques for removing material include, but are not limited to, chemical etching, laser ablation, mechanical removal of material, mechanical pre-treatment followed by etching, lithography in combination with etching, and so on. Chemical etching techniques for glass members may involve using an acid to remove portions of the glass member; acid etching may occur in the liquid phase or in a gas phase. As examples, the acid may comprise hydrofluoric acid, hydrochloric acid, phosphoric acid, nitric acid, sulfuric acid, and the like. Etching techniques also include reactive ion etching, which may use a mixture of a fluorine containing compound such as CH 4 , CHF 3 , SF 6  and the like in a gas such as argon or xenon. Reactive ion etching may be combined with lithography. When operation  1102  comprises removing a portion of the enclosure component, the surface features formed by operation  1102  typically comprise the same material as the glass structure, so that the glass portion of the enclosure component is formed of a single glass material. 
     In additional embodiments, the operation  1102  comprises adding material to an enclosure component. The operation  1102  may comprise adding material to a member of the enclosure component. In embodiments, a sol-gel technique can be used to form surface features, such as silica-containing features, on a glass member. For example, a layer or region(s) of a sol or an at least partially gelled sol (sol-gel) may be deposited on a surface of the glass member. Deposition techniques include, but are not limited to, spin, spray, and dip coating. A gel may then be formed in the layer or region(s) of the sol/sol-gel. The gelled product may be dried, sintered, calcined, and combinations thereof. 
     When the operation  1102  comprises adding material to the enclosure component, the surface features formed typically comprise a different material from the glass member. For example, sol-gel techniques may be used to form a variety of materials including silicon oxides (e.g., silica), metal oxides such as titanium oxides or zirconium oxides and combinations of these. In embodiments, the sol may be formed, at least in part, by hydrolysis of precursor such as a silicon alkoxide or a metal alkoxide. 
     A variety of material structures may be formed via sol-gel techniques. For example, a material formed via a sol-gel technique may have a porous structure, a dense structure, or a structure comprising an assembly of particles. The structure of the material may depend, at least in part, on the structure of the gel formed from the sol via condensation. For example, the gel may be colloidal (including particles), polymeric, or a combination thereof. The particles may have a nano-scale diameter. The gel may also include structure directing agents. Further, imprinting and/or thermal treatment of the gel (such as drying, sintering, and the like) may be used to direct the structure of the gel. 
     As shown in  FIG. 11 , the process  1100  further comprises an operation  1104  of forming a nano-scale texture (nano-texture) along a surface of the enclosure component. The nano-scale texture may be formed in and/or on an exterior surface of a glass member of the enclosure component as schematically illustrated in  FIGS. 12A-12D . 
     The nano-texture may include second surface features having a size from about 1 nm to about 1 micron, and typically less than 1 micron. For example, the second surface features may have a nano-scale width (e.g., as measured between the two furthest points of a base of a projection feature or an opening of a recess). The second surface features may have a width from about 5 nm to about 200 nm, from about 5 nm to about 100 nm, from about 5 nm to about 50 nm, or from about 5 nm to about 25 nm. The second surface features may have a depth from about 5 nm to about 100 nm, from about 5 nm to about 50 nm, or from about 5 nm to about 25 nm. The second surface features may also be characterized by an average pitch. Typically, the average pitch is nano-scale. 
     For example, the second surface features may be configured to provide an effective index of refraction (e.g., an index of refraction less than that of the material defining the second surface features) and therefore produce an anti-reflective effect. By providing both the first surface features and the second surface features in the same areas, and with the second surface features on and between the first surface features, both anti-reflective and anti-glare properties may be achieved on the enclosure surface. 
     In embodiments, the second surface features may be formed by removal of material or by addition of material as previously described for the operation  1102 . However, the removal or additional material typically occurs to a lesser extent than during the operation  1104 . Although the operation  1104  typically follows the operation  1102 , in some embodiments, the operation  1102  and the operation  1104  may occur concurrently (e.g., via an imprinting process). 
     As shown in  FIG. 11 , the process  1100  further comprises an operation  1106  of chemically strengthening the electronic component. In additional embodiments, the operation  1106  is optional. In embodiments, a glass member of the electronic component is chemically strengthened by ion exchange. As an example, ions present in the glass are exchanged for larger ions in an ion-exchange bath to form a compressive stress layer extending from a surface of the glass structure. For example, an ion-exchangeable glass material may include monovalent or divalent ions such as alkali metal ions (e.g., Li+, Na+, or K+) or alkaline earth ions (e.g., Ca2+ or Mg2+) which may be exchanged for other alkali metal or alkaline earth ions. If the glass member comprises sodium ions, the sodium ions may be exchanged for potassium ions. Similarly, if the glass member comprises lithium ions, the lithium ions may be exchanged for sodium ions and/or potassium ions. In embodiments, the compressive stress layer extends at least partially into the surface features. 
     As shown in  FIG. 11 , the process  1100  further includes an operation  1108  of applying a coating, such as a hydrophobic and/or oleophobic coating, to the surface features. The coating may provide resistance to oils and other deposits on the electronic component. For example, the material may comprise a fluorinated material, such as a fluorinated oligomer or polymer, to impart oleophobic and/or hydrophobic properties. For example, the contact angle of an oil on the coating may be greater than or equal to about 65 degrees or about 70 degrees. As an additional example, the contact angle of water on the coating may be greater than or equal to 90 degrees. The fluorinated material may comprise a linear (non-branched) fluorinated molecule such as a linear fluorinated oligomer or a linear fluorinated polymer. 
     For example, a coating comprising a fluorinated material may be applied to the features of both the micro-texture and the nano-texture. If present, the substrate surface may also be coated. In embodiments, the layer of the fluorinated material is from about 5 nm to about 20 nm or from about 10 nm to about 50 nm thick. The layer of the fluorinated material may be bonded directly to the surface features or may be bonded to an intermediate adhesion layer. The layer of the fluorinated material may be thin relative to at least one dimension of the surface features. 
       FIGS. 12A, 12B, 12C, and 12D  show various stages in the process for making a textured enclosure component  1212 .  FIG. 12A  shows a glass member  1252  of the enclosure component  1212  prior to any operations of the process. Although the glass member  1252  is shown in  FIG. 12A  as being substantially planar, the principles described herein also relate to members of enclosure components including one or more curved surfaces. In embodiments, the member and the enclosure component may be three-dimensional. For example, the member and the enclosure component may define a peripheral portion that is not coplanar with respect to a central portion. The peripheral portion may, for example, define a side wall of a device housing or enclosure, while the central portion defines a front surface (which may define a transparent window that overlies a display). 
       FIG. 12B  shows the glass member  1252  after a first set of features  1231  (e.g.,  1231   a ,  1231   b ) have been formed into the glass member  1252 . The first set of features may form a first texture, such as a micro-texture. The first set of features may be formed by removing material from the glass member  1252  as shown in  FIG. 12B  or by adding material as previously described with respect to the operation  1102  of  FIG. 11 . 
       FIG. 12C  shows the glass member  1252  after a second set of features  1241  have been formed along the first set of features  1231  (e.g.,  1231   a ,  1231   b ) of  FIG. 12B . Formation of the second set of features  1241  generally modifies the first set of features  1231  (e.g.,  1231   a ,  1231   b ) as indicated by a modified first set of features  1232  in  FIG. 12C . The second set of features  1241  may form a second texture, such as a nano-texture. The second set of features  1241  may be formed as previously described with respect to the operation  1104  of  FIG. 11 . 
       FIG. 12D  shows enclosure component  1212  after an oleophobic coating  1262  has been applied over the first set of features  1232  and the second set of features  1241  of  FIG. 12C . The resulting texture includes a first set of coated features  1233  and a second set of coated features  1242 . The oleophobic coating may be applied as previously described with respect to the operation  1108  of  FIG. 11 . 
       FIG. 13  is a block diagram of example components of an example electronic device. The schematic representation depicted in  FIG. 13  may correspond to components of the devices depicted in  FIG. 1A-12D  as described above. However,  FIG. 13  may also more generally represent other types of electronic devices with a textured enclosure component as described herein. 
     In embodiments, an electronic device  1300  may include sensors  1320  to provide information regarding configuration and/or orientation of the electronic device in order to control the output of the display. For example, a portion of the display  1314  may be turned off, disabled, or put in a low energy state when all or part of the viewable area of the display  1314  is blocked or substantially obscured. As another example, the display  1314  may be adapted to rotate the display of graphical output based on changes in orientation of the device  1300  (e.g., 90 degrees or 180 degrees) in response to the device  1300  being rotated. As another example, the display  1314  may be adapted to rotate the display of graphical output in response to the device  1300  being folded or partially folded, which may result in a change in the aspect ratio or a preferred viewing angle of the viewable area of the display  1314 . 
     The electronic device  1300  also includes a processor  1304  operably connected with a computer-readable memory  1302 . The processor  1304  may be operatively connected to the memory  1302  component via an electronic bus or bridge. The processor  1304  may be implemented as one or more computer processors or microcontrollers configured to perform operations in response to computer-readable instructions. The processor  1304  may include a central processing unit (CPU) of the device  1300 . Additionally, and/or alternatively, the processor  1304  may include other electronic circuitry within the device  1300  including application specific integrated chips (ASIC) and other microcontroller devices. The processor  1304  may be configured to perform functionality described in the examples above. In addition, the processor or other electronic circuitry within the device may be provided on or coupled to a flexible circuit board in order to accommodate folding or bending of the electronic device. 
     The memory  1302  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  1302  is configured to store computer-readable instructions, sensor values, and other persistent software elements. 
     The electronic device  1300  may include control circuitry  1306 . The control circuitry  1306  may be implemented in a single control unit and not necessarily as distinct electrical circuit elements. As used herein, “control unit” will be used synonymously with “control circuitry.” The control circuitry  1306  may receive signals from the processor  1304  or from other elements of the electronic device  1300 . 
     As shown in  FIG. 13 , the electronic device  1300  includes a battery  1308  that is configured to provide electrical power to the components of the electronic device  1300 . The battery  1308  may include one or more power storage cells that are linked together to provide an internal supply of electrical power. The battery  1308  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  1300 . The battery  1308 , via power management circuitry, may be configured to receive power from an external source, such as an alternating current power outlet. The battery  1308  may store received power so that the electronic device  1300  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 battery  1308  may be flexible to accommodate bending or flexing of the electronic device. 
     In some embodiments, the electronic device  1300  includes one or more input devices  1310 . The input device  1310  is a device that is configured to receive input from a user or the environment. The input device  1310  may include, for example, a push button, a touch-activated button, capacitive touch sensor, a touch screen (e.g., a touch-sensitive display or a force-sensitive display), capacitive touch button, dial, crown, or the like. In some embodiments, the input device  1310  may provide a dedicated or primary function, including, for example, a power button, volume buttons, home buttons, scroll wheels, and camera buttons. 
     The device  1300  may also include one or more sensors  1320 , such as a force sensor, a capacitive sensor, an accelerometer, a barometer, a gyroscope, a proximity sensor, a light sensor, or the like. The sensors  1320  may be operably coupled to processing circuitry. In some embodiments, the sensors  1320  may detect deformation and/or changes in configuration of the electronic device and be operably coupled to processing circuitry which controls the display based on the sensor signals. In some implementations, output from the sensors  1320  is used to reconfigure the display output to correspond to an orientation or folded/unfolded configuration or state of the device. Example sensors  1320  for this purpose include accelerometers, gyroscopes, magnetometers, and other similar types of position/orientation sensing devices. In addition, the sensors  1320  may include a microphone, acoustic sensor, light sensor, optical facial recognition sensor, or other types of sensing device. 
     In some embodiments, the electronic device  1300  includes one or more output devices  1312  configured to provide output to a user. The output device  1312  may include display  1314  that renders visual information generated by the processor  1304 . The output device  1312  may also include one or more speakers to provide audio output. The output device  1312  may also include one or more haptic devices that are configured to produce a haptic or tactile output along an exterior surface of the device  1300 . 
     The display  1314  may include a liquid-crystal display (LCD), light-emitting diode, organic light-emitting diode (OLED) display, an active layer organic light-emitting diode (AMOLED) display, organic electroluminescent (EL) display, electrophoretic ink display, or the like. If the display  1314  is a liquid-crystal display or an electrophoretic ink display, the display  1314  may also include a backlight component that can be controlled to provide variable levels of display brightness. If the display  1314  is an organic light-emitting diode or organic electroluminescent-type display, the brightness of the display  1314  may be controlled by modifying the electrical signals that are provided to display elements. In addition, information regarding configuration and/or orientation of the electronic device may be used to control the output of the display as described with respect to input devices  1310 . In some cases, the display is integrated with a touch and/or force sensor in order to detect touches and/or forces applied along an exterior surface of the device  1300 . 
     The electronic device  1300  may also include a communication port  1316  that is configured to transmit and/or receive signals or electrical communication from an external or separate device. The communication port  1316  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  1316  may be used to couple the electronic device to a host computer. 
     The electronic device  1300  may also include at least one accessory  1318 , such as a camera, a flash for the camera, or other such device. The camera may be connected to other parts of the electronic device  1300  such as the control circuitry  1306 . 
     The following discussion applies to the electronic devices described herein to the extent that these devices may be used to obtain personally identifiable information data. It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users. 
     As used herein, use of the term “about” in reference to the endpoint of a range may signify a variation of +/−5%, +/−2%, or +/−1% of the endpoint value. In addition, disclosure of a range in which at least one endpoint is described as being “about” a specified value includes disclosure of the range in which the endpoint is equal to the specified value. 
     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 intended 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: 20190709
Publication Date: 20211214
Grant Date: 20211214
Priority Date: 20190321
Inventors: POOLE, Joseph C.
ROGERS, MATTHEW S.
MATSUYUKI, NAOTO
Assignee: APPLE INC
CPC Classifications: [{"code": "C03C17/001", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B5/0294", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1601", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/042", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F1/1626", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B13/0085", "inventive": true, "first": false, "tree": "[]"}, {"code": "C03C15/00", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/1616", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B5/0294", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B5/0215", "inventive": true, "first": false, "tree": "[]"}, {"code": "C03C15/00", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04M1/0279", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F2200/1612", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04M1/0266", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B1/118", "inventive": true, "first": true, "tree": "[]"}, {"code": "G02B5/0226", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04M1/0266", "inventive": true, "first": false, "tree": "[]"}, {"code": "C03C17/001", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04M1/0266", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B5/0294", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B13/0085", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F3/042", "inventive": true, "first": true, "tree": "[]"}, {"code": "C03C15/00", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 72515289