Light diffusing device
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United States of America Patent
Stats
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Mar 1, 1988
Grant Date -
N/A
app pub date -
Oct 10, 1986
filing date -
Oct 1, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A light diffusing device useful for evenly illuminating a relatively large area comprises (1) a light source member and (2) a light diffusing member comprising (A) a base plate having (a) a transparent light transmitting layer with at least one light incident edge face thereof, (b) a light diffusing layer formed on the front surface of the transparent light transmitting layer, (c) an intermediate layer formed between the transparent light transmitting layer and the light diffusing layer, and (d) a light reflecting surface layer formed on a rear surface of the transparent light transmitting layer; (B) a light diffusing plate superimposed over the base plate; and (C) a light reflecting film arranged between the base plate and the light diffusing plate and effective for evenly distributing light irradiated from the light diffusing layer into the light diffusing plate.
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