Shift register circuit having bi-directional transmission mechanism
US7929658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2009 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Nov 28, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A shift register includes a plurality of shift register stages for providing gate signals. Each shift register stage has a pull-up unit, a carry unit, a carry control unit, an input unit and a pull-down unit. The pull-up unit is employed to pull up a gate signal according to a driving control voltage and a first clock. The carry unit generates a preliminary start pulse signal based on the driving control voltage and the first clock. The carry control unit outputs the preliminary start pulse signal to become a forward or backward start pulse signal according to first and second bias voltages. The input unit is utilized for inputting a start pulse signal generated by a preceding or succeeding shift register stage to become the driving control voltage. The pull-down unit pulls down the gate signal, the preliminary start pulse signal and the driving control voltage according to multiple clocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.