Dual film light guide for illuminating displays

Details Dual film light guide for illuminating displays Dual film light guide for illuminating displays

2007-04-30

2010-06-08

Kianni, K. Cyrus (Department: 2883)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S067000

Reexamination Certificate

active

07733439

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.

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