Gate driving circuit having reduced ripple effect and...

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

Reexamination Certificate

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Reexamination Certificate

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07936332

ABSTRACT:
In a gate driving circuit and a display apparatus, the gate driving circuit comprises a plurality of stages. At least one of the stages comprises a pull-up section responsive to a first node signal; a pull-down section responsive to a second input signal; a discharging section discharging the first node signal in response to the second input signal; a first holding section responsive to the first clock signal, maintaining the first node signal at the off-voltage; and a second holding section responsive to the second clock signal, maintaining the first node signal at the off-voltage. The second holding section has a greater transistor width-to-length ratio than the first holding section. Therefore, an abnormal gate-on signal is less likely to occur, reducing driving defects of the display apparatus.

REFERENCES:
patent: 6611248 (2003-08-01), Kanbara et al.
patent: 2003/0189542 (2003-10-01), Lee et al.
patent: 2005/0275609 (2005-12-01), Lee
patent: 2006/0022201 (2006-02-01), Kim et al.
patent: 2006/0038500 (2006-02-01), Lee et al.
patent: 2006/0214901 (2006-09-01), Nagatsuka

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