Electronic device enclosure having a textured glass component
Textured cover assemblies for electronic devices are disclosed. The textured cover assemblies may provide a combination of optical and tactile properties to the electronic devices. In some cases, a textured cover assembly may be provided over decorative coating.
1. An electronic device comprising:
a display; and
an enclosure at least partially surrounding the display and at least partially defining an internal volume, the enclosure including a cover assembly comprising a glass cover member having an exterior surface defining a textured region including surface features having a ratio of a mean amplitude to a mean spacing ranging from 0.01 to 0.3, the textured region having:
a transmissive haze ranging from 50% to 90%; and
a graininess less than 1.5 along the textured region.
2. The electronic device of claim 1 , wherein:
the cover assembly is a rear cover assembly defining a rear surface of the electronic device;
the glass cover member is a rear glass cover member;
the enclosure further comprises a front cover assembly defining a front surface of the electronic device and comprising a front glass cover member;
the electronic device further comprises a touch sensor positioned over the display; and
the front glass cover member is positioned over the display and the touch sensor.
3. The electronic device of claim 2 , wherein:
the rear cover assembly further comprises a multilayer decorative coating disposed along an interior surface of the rear glass cover member and visible through the rear glass cover member; and
the multilayer decorative coating comprises:
an optically dense layer; and
a first color layer and a second color layer positioned between the interior surface and the optically dense layer.
4. The electronic device of claim 2 , wherein:
the electronic device further includes a camera assembly;
the rear glass cover member defines a base portion and a protrusion;
the protrusion defines a raised region that is offset with respect to the base portion;
the raised region includes a window region; and
at least a portion of the camera assembly is positioned below the window region.
5. The electronic device of claim 4 , wherein the textured region extends along the base portion.
6. The electronic device of claim 4 , wherein the textured region extends over the raised region.
7. The electronic device of claim 1 , wherein the surface features have a random or semi-random distribution over the textured region.
8. An electronic device comprising:
a housing; and
a cover assembly coupled to the housing and including a glass cover member having an exterior surface defining a textured region, the textured region having a clarity value ranging from 5% to 30% and the textured region including a set of peaks and valleys comprising:
a mean pitch between adjacent peaks ranging from 5 microns to 15 microns;
a root mean square height (Sq) ranging from 0.25 microns to 1.5 microns; and
a mean peak curvature (Ssc) ranging from 0.5 microns −1 to 2 microns −1 .
9. The electronic device of claim 8 , wherein the cover assembly further includes a decorative coating disposed along an interior surface of the glass cover member and viewable through the textured region.
10. The electronic device of claim 9 , wherein:
the decorative coating comprises a plurality of color layers; and
the decorative coating has a uniform appearance as viewed through the textured region.
11. The electronic device of claim 9 , wherein the glass cover member further comprises a gloss value less than 20 gloss units measured at 60 degrees.
12. The electronic device of claim 9 , wherein the mean peak curvature (Ssc) ranges from 0.75 microns −1 to 2 microns −1 .
13. The electronic device of claim 9 , wherein the root mean square height ranges from 0.5 microns to 1.25 microns.
14. The electronic device of claim 9 , wherein the cover assembly further includes a coating disposed along the exterior surface, the coating comprising a fluorinated material and having a thickness from 10 nm to 100 nm.
15. An electronic device comprising:
a housing;
a display positioned at least partially within the housing;
a first cover assembly coupled to the housing, defining a transparent portion positioned over the display, and including a first glass cover member; and
a second cover assembly coupled to the housing and including:
a second glass cover member having:
a textured exterior surface defining an irregular set of hills and valleys having a mean peak spacing from 5 microns to 20 microns and a root mean square slope (Sdq) from 0.1 to less than 1; and
a gloss value from 5 units to 20 gloss units as measured at 60 degrees.
16. The electronic device of claim 15 , wherein the gloss value is from 10 gloss units to 20 gloss units.
17. The electronic device of claim 15 , wherein the second cover assembly further comprises a metallic marking disposed along an interior surface of the second glass cover member and visible through the textured exterior surface.
18. The electronic device of claim 15 , wherein the root mean square slope is from 0.1 to 0.5.
19. The electronic device of claim 15 , wherein the irregular set of hills and valleys has a root mean square height from 0.25 microns to 1 micron.
20. The electronic device of claim 15 , wherein:
the electronic device is a mobile phone;
the first cover assembly defines a front side of the mobile phone; and
the second cover assembly defines a rear side of the mobile phone.