Light emitting diode lamp device
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United States of America Patent
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-
Apr 22, 2003
Grant Date -
N/A
app pub date -
Aug 18, 2000
filing date -
Aug 20, 1999
priority date (Note) -
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Abstract
A casing accommodates therein three primary colors of chip LEDs. The casing is disposed in a through hole of a plate-shaped light guide. The chip LEDs are mounted on both surfaces of a substrate so as to face a peripheral surface of the through hole (light incident surface). The casing is made of a transparent synthetic resin accommodating therein the substrate and the chip LEDs. The light emitted from the chip LEDs can be introduced directly into the light incident surface of the light guide. The three primary color of chip LEDs are controlled so that a desired color and intensity of light can be efficiently introduced into the light guide.
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