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Memory interface circuit and access method

  • US 5,929,832 A
  • Filed: 03/01/1996
  • Issued: 07/27/1999
  • Est. Priority Date: 03/28/1995
  • Status: Expired due to Term
First Claim
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1. A memory interface circuit for converting an input data signal into multi-scan data signals used for a multi-scan type liquid crystal display including a display panel comprising a first portion and a second portion, the memory interface circuit including:

  • a memory for receiving and storing one frame of the input data signal corresponding to the display panel, anda control circuit for controlling write/read operations for the memory so that the input data signal is sequentially written in the memory in a single-scan manner, and that data stored in the memory is read out as first and second multi-scan signals in a multi-scan manner, the first multi-scan signal corresponding to the first portion of the display panel and the second multi-scan signal corresponding to the second portion of the display panel,wherein the control circuit controls the timing of read operations so that a read operation for the second multi-scan signal is started a predetermined time after a read operation for the first multi-scan signal is started and before the read operation of the first multi-scan signal is completed, the predetermined time being equal to a delay time of a start of a write operation of the input data signal corresponding to the second portion with respect to a start of a write operation of the input data signal corresponding to the first portion.

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