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US 4,729,067 AGranted
Light diffusing device
AssigneeMitsubishi Rayon Co., Ltd.
InventorMakoto Ohe
Life of this patent
Estimating the term…
Abstract
A light diffusing device useful for evenly illuminating a relatively large area comprises; (A) a base plate comprising a transparent light transmitting layer, an intermediate layer and a light diffusing layer arranged in the above mentioned order, and having at least one light, incident edge face thereof; (B) a light reflecting surface layer formed on a surface of the transparent light transmitting layer opposite to the light diffusing layer; and (C) a light diffusing plate arranged on and in the vicinity of the light diffusing layer but not in contact with the light diffusing layer.
Claims5
A light diffusing device comprising:
- (A) a base plate comprising (a) a transparent light transmitting layer, (b) a light diffusing layer formed on a front surface of the transparent light transmitting layer, and (c) an intermediate layer formed between the transparent light transmitting layer and the light diffusing layer and having a light transmitting property and a light diffusing property respectively at intermediate intensities between those of the transparent light transmitting layer and the light diffusing layer, which base plate has at least one light incident edge face thereof;
- (B) a light reflecting surface layer formed on a rear surface of the transparent light transmitting layer;
- and
- (C) a light diffusing plate arranged on and in the vicinity of the light diffusing layer but not in contact with the light diffusing layer.
1 more element
Dependencies are inferred from the claim text.