Apparatus and method for eliminating residual image in a...

Details Apparatus and method for eliminating residual image in a... Apparatus and method for eliminating residual image in a...

2006-09-19

2006-09-19

Nguyen, Jimmy H. (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S092000

Reexamination Certificate

active

07109965

ABSTRACT:
A residual image eliminating apparatus and method for a liquid crystal display device is adaptive for eliminating residual images emerging on a screen after power-off due to electric charges accumulated in pixel cells. In the apparatus, upon power-on, a first voltage level for turning off thin film transistors is applied to gate lines. Upon power-off, a higher level voltage than a ground voltage is applied to the gate lines. At this time, a voltage at the gate line is raised into a voltage level capable of opening a channel of the thin film transistor, thereby discharging an electric charge charged in a pixel. As a result, residual images are rapidly eliminated from the liquid crystal panel upon power-off.

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“Black/White Drive Method for Thin Film Transistor-Liquid Crystal Display at Power-Off.”IBM Technical Disclosure Bulletin. vol. 39, No. 11, Nov. 1996.

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