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Apparatus for controlling LCD backlight in mobile station

  • US 7,301,522 B2
  • Filed: 02/05/2003
  • Issued: 11/27/2007
  • Est. Priority Date: 08/28/2002
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling a backlight of an LCD in a mobile station comprising:

  • a backlight LED (Light Emit Diode) for generating a backlight to the LCD;

    a backlight drive which receives an input current and supplies an output current to the backlight LED to drive the backlight LED;

    a current control unit for controlling the input current of the backlight drive by a current control signal; and

    a control unit for supplying the current control signal to the current control unit to control the input current of the backlight drive according to the normal mode or dimming mode, as determined depending on whether there is a user'"'"'s key manipulation, during operation of the LCD,wherein when in the dimming mode the input current of the backlight drive is less than the input current during the normal mode and greater than 0.

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