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Lighting unit

  • US 5,375,043 A
  • Filed: 07/06/1993
  • Issued: 12/20/1994
  • Est. Priority Date: 07/27/1992
  • Status: Expired due to Fees
First Claim
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1. A lighting unit of an indirect type for substantially uniform illumination, comprising:

  • a light guide plate comprised of a transparent plate;

    a plurality of light emitting diodes each serving as a light source for supplying a light to said light guide plate, said light emitting diodes being arranged to enable selective illumination of different colored light by said lighting unit;

    means for substantially uniformly distributing said light in said light guide plate; and

    a control section connected to energize said plurality of light emitting diodes;

    said control section comprising a liquid crystal display panel operating system adapted to output control signals for a liquid crystal display panel, and means for energizing said light emitting diodes in response to outputs of said liquid crystal display panel operating system, whereby the illumination of said lighting unit varies as a function of said output control signals.

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