Communications: electrical – Visual indication – Using light emitting diodes
Patent
1997-08-20
1999-09-07
Wu, Daniel J.
Communications: electrical
Visual indication
Using light emitting diodes
34081573, 345 82, 362800, 362812, 31331804, 40570, G08B 522
Patent
active
059493470
ABSTRACT:
Retrofitting lamps using Light-Emitting Diodes (LEDs) as the illumination source. The lamps are fitted with any one of the common incandescent lamp bases for use as retrofit lamps for illuminated EXIT signs and the like. The LED lamps are electrically powered with a current limiting device to allow LED to operate at a desired current level. The LEDs are arranged on a shaped frame so that they are aimed in directions to provide bright and uniform illumination over an area of the face of the sign that is wider and longer than the width and the length of the lamps.
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Huang Sihong
Leotek Electronics Corporation
Wu Daniel J.
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