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Light source device and method for modulating brightness of light emitted by same and liquid crystal display using same

  • US 20080135737A1
  • Filed: 12/11/2007
  • Published: 06/12/2008
  • Est. Priority Date: 12/11/2006
  • Status: Active Grant
First Claim
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1. A light source device, comprising:

  • a power supply;

    a light source; and

    a photodetector comprising a light sensor and a resistor connected in parallel;

    wherein the power supply, the light source, and the photodetector are connected in series, and when the intensity of ambient light increases, a resistance of the light sensor decreases so as to increase a light intensity of the light source, and when the intensity of ambient light decreases, the resistance of the light sensor increases so as to decrease the light intensity of the light source.

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