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Power conservation method for a portable computer with LCD display

  • US 5,991,883 A
  • Filed: 07/23/1996
  • Issued: 11/23/1999
  • Est. Priority Date: 06/03/1996
  • Status: Expired due to Term
First Claim
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1. A portable computer system with reduced power consumption, comprising:

  • a microprocessor;

    a graphics controller connected to said microprocessor;

    a video display connected to said graphics controller; and

    circuitry connected to detect when said portable computer system requires a reduced power mode;

    wherein said graphics controller is connected to operate said video display at a first refresh rate during normal operation, and at a second refresh rate, non-zero and lower than said first refresh rate, when said circuitry detects that a reduced power mode is required.

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