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Signal drive circuit, display device, electro-optical device, and signal drive method

  • US 7,002,568 B2
  • Filed: 05/23/2002
  • Issued: 02/21/2006
  • Est. Priority Date: 05/24/2001
  • Status: Expired due to Fees
First Claim
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1. A signal drive circuit for driving a plurality of signal lines of an electro-optical device which includes a plurality of pixels defined by a plurality of scan lines and the signal lines crossing each other, based on image data comprising:

  • a line latch for latching the image data for a horizontal scan period;

    a drive voltage generating section for generating drive voltages of the signal lines based on the image data latched by the line latch;

    a signal line drive section for driving the signal lines based on the drive voltages generated by the drive voltage generating section; and

    a partial display data holding section for holding partial display data which indicates propriety of output of the drive voltages to the signal lines on a block basis, each block constituting a predetermined number of signal lines,wherein the signal line drive section includes;

    an impedance conversion section for subjecting drive voltages generated by the drive voltage generating section to impedance conversion to output the impedance-converted drive voltages to the signal lines; and

    a non-display level voltage supplying section for generating predetermined non-display level voltages on the signal lines, andwherein each of the signal lines is driven by one of the impedance conversion section and the non-display level voltage supplying section on a block basis based on the partial display data.

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