Shift register and display device having the same
US7724864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/184
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A shift register includes a plurality of stages to output a plurality of output signals, in sequence. Each of the stages includes a driving part and a discharging part. The driving part outputs an output signal of a present stage based on one of a start signal and an output signal of a previous stage, and a clock signal. The discharging part discharges the output signal of the present stage. The discharging part includes a discharge transistor and an auxiliary transistor. The discharge transistor has a gate electrode receiving an output signal of a next stage. The auxiliary transistor has a gate electrode receiving the output signal of the next stage. The auxiliary transistor is electrically connected in series to the discharge transistor. Therefore, the chance of a malfunction is decreased, and image display quality of the display device is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.