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Display driving circuit

  • US 7,994,738 B2
  • Filed: 08/19/2008
  • Issued: 08/09/2011
  • Est. Priority Date: 06/02/2008
  • Status: Expired due to Fees
First Claim
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1. A display driving circuit for driving a display comprising:

  • a temperature compensation adjustment circuit for outputting a variable current signal corresponding to environmental temperature changes, the temperature compensation adjustment circuit comprising;

    a first resistor;

    a second resistor;

    an operational amplifier comprising a first terminal connected to the full bridge circuit, a second terminal connected to ground through the second resistor, and a third terminal connected to the second terminal through the first resistor; and

    a temperature compensation device comprising two terminals connected to the third terminal and the control circuit, respectively;

    a full bridge circuit;

    a control circuit for controlling the full bridge circuit according to the variable current signal, wherein a voltage output from the full bridge circuit decreases as the variable current signal increases, and increases as the variable current signal decreases; and

    a transformation circuit for amplifying the voltage output of the full bridge circuit to drive the display.

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