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Display control apparatus

  • US 5,977,945 A
  • Filed: 09/25/1997
  • Issued: 11/02/1999
  • Est. Priority Date: 09/18/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus for performing a raster scanning display operation on a display including a plurality of scanning lines, comprising:

  • storing means for storing image data to be displayed;

    updating means, including a program, for performing an updating operation to update a portion of the image data stored in the storing means to different, updated image data, the updated image data being determined by said updating means using a command of the program; and

    drive means for driving the display to perform the display operation in accordance with the updated image data,wherein said updating means performs the updating operation without accessing the previously stored image data and simultaneously supplies line information designating one of the scanning lines on which to display the updated data to said drive means.

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