Surface light source device

Details Surface light source device Surface light source device

1996-04-17

1999-11-23

Sember, Thomas M.

Illumination

Revolving

362 26, 362327, 362330, F21V 704

Patent

active

059888261

ABSTRACT:
Surface light source device having a light conducting member, a light source, a light diffusing member disposed on a front light incidence surface side of the light conducting member, and a light reflecting member arranged on a rear side of the light conducting member; and a refractive index of the light conducting member is arranged to be constant for a distance from the light incidence surface and then to be varied so as to be smaller as farther from the light source, to obtain a bright and uniform brightness distribution.

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patent: 5130888 (1992-07-01), Akahane
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patent: 5161873 (1992-11-01), Obata
patent: 5184888 (1993-02-01), Sakuma et al.
patent: 5262928 (1993-11-01), Kashima et al.
patent: 5349503 (1994-09-01), Blonder et al.

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