Pull-down control circuit and shift register of using same

Details Pull-down control circuit and shift register of using same Pull-down control circuit and shift register of using same

2009-09-23

2011-11-29

Lam, Tuan T (Department: 2816)

Electrical pulse counters, pulse dividers, or shift registers: c

Shift register

C377S068000, C377S079000

Reexamination Certificate

active

08068577

ABSTRACT:
The present invention relates to a pull-down control circuit and a shift register of using same. In one embodiment, the pull-down control circuit includes a release circuit and four transistors T4, T5, T6and T7electrically coupled to each other. The release circuit is adapted for causing the transistor T5to be turned on and off alternately, thereby substantially reducing the stress thereon, improving the reliability and prolonging the lifetime of the shift register.

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patent: 2008/0001904 (2008-01-01), Kim et al.
patent: 2010/0150303 (2010-06-01), Tsai et al.

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