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Power down mode for computer system

  • US 5,757,365 A
  • Filed: 06/07/1995
  • Issued: 05/26/1998
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Fees
First Claim
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1. A power saving computer system comprising:

  • an information processor for storing and processing information, comprising;

    a display controller for generating frames of update data, each frame of update data including a plurality of grey-scale pixel data groups, each pixel data group having an n-bit signal defining one of a plurality of grey-scale brightness grades;

    a power-saving circuit responsive to absence of a predetermined number of frames of update data for temporarily disabling portions of said information processor; and

    remapping means in communication with said display controller and said power-saving circuit for remapping the grey-scale pixel data groups of a current frame of update data into corresponding black-and-white pixel data defining only one of two brightness grades in response to the absence of update data; and

    a display panel for selectively receiving the frames of update data from said information processor to generate an image on a panel screen, comprising;

    a panel memory in communication with said display controller for storing at least the remapped current frame of update data; and

    refresh means in communication with said panel memory, said display controller, and said power-saving circuit to self-refresh the panel screen from update data stored in said panel memory in response to the absence of update data.

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