Adapted pre-filtering for bit-line repeat algorithm

Details Adapted pre-filtering for bit-line repeat algorithm Adapted pre-filtering for bit-line repeat algorithm

2005-08-16

2005-08-16

Awad, Amr A. (Department: 2675)

Computer graphics processing and selective visual display system

Display driving control circuitry

Intensity or color driving control

C345S063000, C345S691000

Reexamination Certificate

active

06930694

ABSTRACT:
When the observation point on a PDP screen moves, artifacts will be introduced which are commonly described as “dynamic false contour”. A simple way to reduce this effect requires the use of more sub-fields at the expense of panel brightness. A first idea called Bit-Line-Repeat (BLR) makes it possible to exchange vertical resolution with addressing time in order to dispose of more sub-fields for the same brightness. Nevertheless, such a solution introduces some vertical artifacts mostly during movement. Therefore, before the step of sub-field encoding a vertically filtering of the picture divided into pixel blocks is performed, wherein each block includes at least one pixel in horizontal direction and a number of pixels corresponding to the number of common lines in vertical direction. The effect of the pre-filtering step is that the difference of brightness values within each pixel block is limited to a predetermined value. In that case the BLR introduces only a slight vertical loss free from motion artifacts.

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patent: 6151001 (2000-11-01), Anderson et al.
patent: 6340961 (2002-01-01), Tanaka et al.
patent: 6373477 (2002-04-01), Van Dijk
patent: 6630917 (2003-10-01), Van Dijk
patent: 874349 (1998-10-01), None
patent: 1058229 (2000-12-01), None

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