Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-05-26
1997-08-12
Nguyen, Chanh
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 94, G09G 336
Patent
active
056570414
ABSTRACT:
A method of driving a matrix liquid crystal display (LCD) panel can improve LCD response characteristics due to an improved duty ratio, by overlapping scanning electrode driving signals internally having a positive selection pulse and a negative compensation pulse sequentially by a predetermined interval, or, at the time of driving two lines, by applying a signal whose sequence of selection pulse and compensation pulse of the scanning electrode driving signal applied thereto are reversed and overlapping a predetermined interval thereof. Also, when a data electrode driving signal is switched, since the signal is switched after maintaining an intermediate voltage level, at the interval where the scanning electrode driving signals are sequentially overlapped, a rapid change in voltage level can be prevented, that is, the data electrode driving signal variation is improved, which leads to a remarkable reduction of a waveform differential induced for a non-selection scanning electrode driving signal, thereby considerably reducing the crosstalk of an LCD.
REFERENCES:
patent: 4649383 (1987-03-01), Takeda et al.
patent: 5119219 (1992-06-01), Terada et al.
patent: 5283564 (1994-02-01), Katakura et al.
Nguyen Chanh
Samsung Display Devices Co. Ltd.
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