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APPARATUS AND METHOD FOR SPEEDING UP DIPLAY RESPONSE

IP.com Disclosure Number: IPCOM000014285D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Abstract

Discolsed is an apparatus and method for speeding up display response. In some cases, display devices are not fast enough to show images that change quickly. The disclosed overcomes the slowness by providing a digital method, while prior arts have employed analog circuit techniques such as speedup condensers. The disclosed method modifies input pixel data adaptively so that changes from previous to current pixel data shown or to be shown are amplified in some degree. This is known as overdrive. The present method performs overdrive digitally. The overdriven data compensate low pass filter nature of the display devices /human visual systems and are shown/perceived more quickly. Human psycho-visual system should remove or smooth temporal edginess caused by the overdrive, if any. FIG. 1 shows the conceptual block diagram of the overdrive method in Z-Transfrom domain. Input pixel data, X, is amplified by factor b, while previous output data, Z:sup.-1:esup.Y, is amplified by factor a. Then the amplified previous Y is subtracted from the amplified X and the difference is output as new Y. The system function is Y bX (1 aZ:sup.-1:esup.)