Front-illuminating device and a reflection-type liquid crystal display using such a device
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United States of America Patent
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Apr 12, 2005
Issued Date -
N/A
app pub date -
Sep 13, 1999
filing date -
Mar 28, 1997
priority date (Note) -
In Force
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Abstract
Featured are a front-illuminating device including a light source and first and second light-directing bodies. The first light-directing body is disposed in front of an object to be illuminated and has a first light-releasing surface from which light is released to the object to be illuminated and a second light-releasing surface, placed face to face with the first light-releasing surface, for releasing light reflected from the object to be illuminated. The second light-releasing surface also is formed into a step shape and includes slanting portions that reflect light mainly from the light source toward the first light-releasing surface. The second light-directing body is disposed between the first light-directing body and the object to be illuminated and is configured and arranged so a distance from each of the slanting portions to the surface of the second light-directing body second surface is essentially uniform.
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