Amazon patents e-reader screen design for even lighting
This patent describes a display setup for electronic readers that uses a specific arrangement of LEDs and a light guide to spread light evenly across the screen. It includes a cover lens assembly with a dark adhesive border to stop light from leaking out the sides.
In the filing’s own words
Systems, methods, and devices are disclosed for front-lit displays having uniform brightness. In one embodiment, an example display may include an electrophoretic display, a light guide configured to direct light from one or more light emitting diodes, and a cover lens assembly. The cover lens assembly may include a cover glass layer, an anti-glare film coupled to the cover glass layer, and a hot melt adhesive disposed about lateral edge surfaces of the cover glass layer and the anti-glare film, such that the hot melt adhesive forms a perimeter of the cover lens assembly.
What exactly they claim (claim 1)
1. An electronic reader device comprising: a housing; a display stack coupled to the housing, the display stack comprising: an electrophoretic display (EPD); a light guide, wherein the light guide comprises a first set of surface features disposed at a non-horizontal angled orientation along a first side portion and a second side portion of the light guide, and a second set of surface features disposed at a horizontal orientation along a middle portion of the light guide, wherein the horizontal orientation is horizontal relative to a bottom or top surface of the light guide; and a cover lens assembly comprising: a cover glass layer; an anti-glare film coupled to the cover glass layer; and a hot melt adhesive disposed about lateral edge surfaces of the cover glass layer and the anti-glare film, such that the hot melt adhesive forms a perimeter around the cover lens assembly, wherein the hot melt adhesive is a dark color configured to prevent light leakage about the lateral edge surfaces of the display stack; a first light emitting diode (LED) disposed adjacent to an edge surface of the light guide, wherein the first LED is separated from the edge surface by a first distance; and a second LED disposed adjacent to the first LED, wherein the second LED is separated from the edge surface by a second distance that is greater than the first distance.
Facts
- Company
- Amazon (Amazon Technologies, Inc.)
- Official title
- Front-lit displays and indicators having uniform brightness
- Patent number
- US12724303B2
- Application number
- 17935758
- Filed
- Sep 27, 2022
- Granted
- Sep 1, 2026
- Inventors
- 7
- Claims
- 19
Classified under
G02F 1/133502 Physics & computingG02B 6/0073 Physics & computingG02F 1/13338 Physics & computingG02F 1/133526 Physics & computingG02F 1/167 Physics & computingG02F 1/1677 Physics & computingMore from Amazon in Phones & computers
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.