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Method of driving a liquid crystal display device and a driving circuit for the liquid crystal display device

  • US 5,900,857 A
  • Filed: 05/17/1996
  • Issued: 05/04/1999
  • Est. Priority Date: 05/17/1995
  • Status: Expired due to Term
First Claim
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1. A method of driving a display device having a plurality of scanning lines and a plurality of data lines comprising the steps of:

  • selecting simultaneously a first group of said plurality of scanning lines in said device;

    dividing a single matrix picture area into a plurality of picture area blocks, each one of said plurality of picture area blocks including a second group of said plurality of scanning lines, wherein a number of said second group of said plurality of scanning lines is an integral multiple of a number of said first group of said plurality of scanning lines, wherein said single matrix picture area includes said plurality of scanning lines and said plurality of data lines;

    dividing each one of at least one memory into a plurality of memory blocks, wherein each one of said plurality of memory blocks has sufficient capacity to store all reading and writing data displayed on each one of said plurality of picture area blocks, and said each one of said plurality of memory blocks is accessible in parallel;

    writing display data in said each one of said at least one memory;

    reading out said display data from said each one of said at least one memory; and

    performing at least one arithmetic operation on display data which has been read out by said step of reading out to produce a plurality of signals to be applied to said plurality of data lines, whereina first plurality of frames for writing said display data are synchronized with a second plurality of frames for reading said display data, andeach one of said plurality of memory blocks undergoes reading a predetermined number of times before new display data are written into said each one of said plurality of memory blocks.

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