Back lighting device

Details Back lighting device Back lighting device

1992-02-20

1993-11-16

Husar, Stephen F.

Illumination

Revolving

362 26, 359 49, F21V 704

Patent

active

052629287

ABSTRACT:
A back lighting device which comprises a light conducting plate made of a light-transmissive material, a linear light source provided in proximity to the end portion of at least one side of the light conducting plate, a reflecting plate or film that covers the linear light source and which consists, in order from the light source side, of a specular reflecting plate or film, an air layer and a light diffusing/reflecting plate or film in superposition. One surface of the light conducting plate is provided with a light diffusing capability and covered with a specular or light diffusing/reflecting plate. Thereby, it is possible to provide a back lighting device that has a high efficiency of power to luminance conversion and which hence is capable of achieving high luminance.

REFERENCES:
patent: 4755222 (1988-10-01), Ohe
patent: 4949489 (1990-08-01), Rudell et al.
patent: 5055978 (1991-10-01), Rogoff

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