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Display device and driving device for a light source

  • US 7,595,785 B2
  • Filed: 07/22/2005
  • Issued: 09/29/2009
  • Est. Priority Date: 07/22/2004
  • Status: Expired due to Fees
First Claim
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1. A driving device for at least one light source, comprising:

  • a temperature sensor operable for sensing a surrounding temperature of the light source and outputting a first control signal in response to the sensed temperature;

    a signal output portion operable for receiving a second control signal based on a first brightness control signal applied from an external source;

    changing the second control signal based on the first control signal; and

    outputting the changed second control signal; and

    an inverter controller operable for receiving the changed second control signal and outputting a third control signal based on the changed second control signal, whereinthe first control signal becomes a low level when the surrounding temperature of the light source is less than a predetermined temperature of the light source, and the second and third control signals are adjusted based on the first control signal, andthe second control signal becomes a low level when the first control signal is a low level, and the third control signal is ramped up to a high level for driving the at least one light source.

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