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PDP display drive pulse controller

  • US 20020036650A1
  • Filed: 07/20/2001
  • Published: 03/28/2002
  • Est. Priority Date: 12/10/1997
  • Status: Active Grant
First Claim
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1. A display apparatus for creating, for each image, a number of subfields Z from a first subfield to a Zth subfield in accordance with a Z bit representation of each pixel, a weighing value for each subfield, and a number of gradation display points, the display apparatus comprising:

  • a peak level detector that detects a peak image brightness level;

    an average level detector that detects an average image brightness level;

    an image characteristic determining device that determines a weighing multiple including a positive integer part and a fractional part, based on the peak image brightness level and the average image brightness level; and

    a pulse number setting device that multiples the weighing multiple by the weighing value of each subfield to obtain a product capable of having a positive integer part and a fractional part, and that defines an integer value near the product as a number of drive pulses for each subfield;

    wherein the image characteristic determining device increases the weighing multiple as the average image brightness level decreases and as the peak image brightness level increases.

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