Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-06-27
1999-04-20
Lao, Lun-Yi
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 92, 345211, G09G 336
Patent
active
058961178
ABSTRACT:
A drive circuit and method for driving a thin film transistor liquid crystal display which reduce kickback voltage by generating a gate drive signal that has a reduced on voltage during a drop portion of the horizontal scanning time. The circuit includes a voltage signal generating circuit for receiving both a common electrode signal and an inverting common electrode signal and generating voltage signals, a drop signal generating circuit for generating drop signals, and a signal mixer circuit for combining the voltage signals and the drop signals and generating a composite output signal. The voltage signal generating circuit and the drop signal generating circuits both include a series of boost stages comprised of diode voltage multipliers. The signal mixing circuit includes a series of switches that are controlled by the drop signals. The length of the drop portion of the horizontal scan time can be controlled by a period control signal.
REFERENCES:
patent: 5323171 (1994-06-01), Yokouchi et al.
patent: 5635865 (1997-06-01), Moon et al.
Lao Lun-Yi
Samsung Electronics Co,. Ltd.
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