DUAL FILM LIGHT GUIDE FOR ILLUMINATING DISPLAYS
First Claim
1. A light guide comprising:
- an upper portion having top and bottom surfaces, said bottom surface of said upper portion being contoured; and
a lower portion having top and bottom surfaces, said top surface of said lower portion being contoured,wherein said upper portion is disposed over said lower portion such that said contoured bottom surface of said upper portion and said contoured top surface of said lower portion form cavities between the upper portion and the lower portion.
3 Assignments
0 Petitions
Accused Products
Abstract
A front light guide panel including a plurality of embedded surface features is provided. The front light panel is configured to deliver uniform illumination from an artificial light source disposed at one side of the font light panel to an array of display elements located behind the front light guide while allowing for the option of illumination from ambient lighting transmitted through the light guide panel. The surface embedded surface relief features create air pockets within the light guide panel. Light incident on the side surface of the light guide propagates though the light guide until it strikes an air/light material guide interface at one on the air pockets. The light is then turned by total internal reflection through a large angle such that it exits an output face disposed in front of the array of display elements.
147 Citations
34 Claims
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1. A light guide comprising:
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an upper portion having top and bottom surfaces, said bottom surface of said upper portion being contoured; and a lower portion having top and bottom surfaces, said top surface of said lower portion being contoured, wherein said upper portion is disposed over said lower portion such that said contoured bottom surface of said upper portion and said contoured top surface of said lower portion form cavities between the upper portion and the lower portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34-92. -92. (canceled)
Specification