Light guide with at least partially non-transmissive coating on ledge region

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United States of America Patent

PATENT NO 8789995
APP PUB NO 20130176317A1
SERIAL NO

13344771

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Abstract

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This disclosure provides systems, methods and apparatus related to an illumination system for a display device. In one aspect, the illumination system includes a light guide having a view region, which directly overlies display elements of a display, and a ledge region between the view region and a light source that injects light into the light guide. The ledge region is coated with an at least partially non-transmissive layer. The layer can be at least partially absorptive and/or at least partially reflective. In some implementations, the layer can include microstructures configured to turn steep-angle light such that it is redirected across the light guide at a shallower angle. In some implementations, the boundary between the ledge region and the view region of the light guide can have a nonlinear shape.

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Patent Owner(s)

  • SNAPTRACK, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bita, Ion San Jose, US 106 2286
Li, Kebin Fremont, US 34 342

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