PDP display drive pulse controller
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United States of America Patent
Stats
-
Feb 10, 2004
Grant Date -
Mar 28, 2002
app pub date -
Jul 20, 2001
filing date -
Dec 10, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A display apparatus creates, 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 detects a peak image brightness level and an average image brightness level. A weighing multiple including a positive integer part and a fractional part is determined based on the peak image brightness level and the average image brightness level. The weighing multiple is multiplied by the weighing value of each subfield to obtain a product capable of having a positive integer part and a fractional part. An integer value near the product is defined as a number of drive pulses for each subfield. The weighing multiple is increased as the average image brightness level decreases and as the peak image brightness level increases.
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