Coated cover substrates and electronic devices including the same
In one or more embodiments disclosed herein, an electronic device may include a display device operable to project an image, a front cover substrate positioned over the display device and including a transparent material, and a protective coating disposed on at least a portion of the non-display area of the front cover substrate. The front cover substrate may include a display area over the display device and a non-display area around at least the perimeter of the front cover substrate. The protective coating may include an inorganic material. The protective coating may not be positioned over the display area.
1. An electronic device comprising:
a display device operable to project an image;
a front cover substrate positioned over the display device and comprising a transparent material, the front cover substrate comprising a display area over the display device and a non-display area around at least a perimeter of the front cover substrate such that the display device is operable to project the image through the display area of the front cover substrate; and
a protective coating disposed on top of at least a portion of a front surface of the front cover substrate in the non-display area of the front cover substrate, the protective coating comprising an inorganic material, wherein the front surface is opposite the display device, and the display area is free of the protective coating.
2. The electronic device of claim 1 , wherein the protective coating comprises one or more of Si u Al v O x N y , Ta 2 O 5 , Nb 2 O 5 , AIN, Si 3 N 4 , AlO x N y , SiO x N y , SiN x , SiN x :H y , HfO 2 , TiO 2 , ZrO 2 , Y 2 O 3 , Al 2 O 3 , MoO 3 , TiC, TiB, TiBC, SiC, Si n O x C, diamond film, or combinations thereof.
3. The electronic device of claim 1 , wherein the protective coating comprises a thickness of from ≥100 nm to ≤10 microns.
4. The electronic device of claim 1 , wherein the protective coating is disposed at the edges of the front cover substrate.
5. The electronic device of claim 1 , wherein the protective coating is disposed over substantially the entire non-display area.
6. The electronic device of claim 1 , wherein 50% or less of the front cover substrate is free of the protective coating.
7. The electronic device of claim 1 , further comprising a camera, wherein the front cover substrate comprise a camera area adjacent the camera, and wherein the non-display area is distinct from the camera area.
8. The electronic device of claim 1 , further comprising an opaque layer under at least a portion of the non-display area of the front cover substrate.
9. The electronic device claim 1 , wherein the protective coating comprises an a* of greater than or equal to 2 or a b* of greater than or equal to 2 in transmittance when viewed at a normal angle of incidence according to L*a*b* color coordinates.
10. The electronic device of claim 1 , further comprising an ETC coating over at least a portion of the protective coating.
11. The electronic device of claim 1 , further comprising a back cover substrate comprising a non-display area, and a back protective coating disposed on the non-display area of the back cover substrate.
12. The electronic device of claim 1 , wherein the front cover substrate comprises glass.
13. The electronic device of claim 12 , wherein the front cover substrate comprises a thickness of from ≥100 microns to ≤5 mm.
14. The electronic device of claim 1 , wherein the electronic device is a smartphone or tablet computer.