Shift register and a liquid crystal display device having the same
US8411017B2 · kind B2 · utility
4Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2009 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Dec 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3677
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A shift register of an LCD device operates based on two clock signals and maintains the gate voltage of an output transistor switch using two pull-down transistor switches. The gate voltages of the pull-down transistor switches are switched periodically between the high and low level of the clock signals. During the output period, the transistor switches have negative gate-source voltages so as to reduce leakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.