Optical guide and surface light emitting apparatus using the...

Details Optical guide and surface light emitting apparatus using the... Optical guide and surface light emitting apparatus using the...

2005-12-23

2008-11-04

Kianni, K. Cyrus (Department: 2883)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C385S018000, C385S036000

Reexamination Certificate

active

07446828

ABSTRACT:
A light emitting apparatus that is capable of emitting light with uniform intensity and high luminance are provided. The first optical guide comprises a first principal surface that has an effective light emitting region of substantially rectangular shape surrounded by first through fourth sides and a second principal surface that opposes the first principal surface, wherein the circumferential side face of the optical guide includes first through fourth side faces disposed along the first through fourth sides, respectively, and a light introducing section, disposed at the corner interposed between the first and second side faces, with an angle of inclination from the first side face that is determined so that center axis of light distribution intersects one of the first through fourth sides and divides the area of the effective light emitting region into two equal parts.

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