Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-01-19
1998-10-06
Saras, Steven J.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345100, G09G 320, G09G 336
Patent
active
058184023
ABSTRACT:
A common-voltage compensation driving apparatus and method and a crosstalk-compensation driving apparatus of an AMLCD detect current flowing through a common electrode for an optional period to compensate for a common electrode voltage by using the current value as a reference and eliminate crosstalk resulting from the variation of a video data value. The common-voltage compensation driving apparatus includes a current detector for detecting the current flowing through a common electrode for an optional period, a proportional voltage generator for integrating the current detected by the current detector to generate a proportional voltage corresponding to the integrated current, a common voltage generator for compensating the proportional voltage of the proportional voltage generator to a common electrode voltage during a compensating period shorter than one horizontal scanning period, and a controller for controlling driving times of the current detector, proportional voltage generator and common voltage generator. The method therefor is performed by a current detecting step, a proportional voltage generating step, and a common voltage generating step. The crosstalk compensation driving apparatus has the current detector, the proportional voltage generator, a data signal voltage compensator for compensating the proportional voltage of the proportional voltage generator to a data signal voltage output during a compensating period shorter than one horizontal scanning period, and the controller.
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Jeong Yun-Cheol
Park Jong-Cheol
Bell Paul A.
LG Electronics Inc.
Saras Steven J.
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