GOA circuit and liquid crystal display device
US9633620B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2015 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Aug 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a GOA circuit and a liquid crystal display device each including multiple cascade connected GOA units. An nth-stage GOA unit is for charging an nth-stage horizontal scan line in a display area. The nth-stage GOA unit includes a pull-up control circuit, a pull-up circuit, a transfer circuit, a first pull-down control circuit, a first pull-down circuit, a second pull-down control circuit, a second pull-down circuit and a main pull-down circuit, where n is a positive integer. The invention can improve the stage-transfer efficiency of GOA circuit, improve the output quality of scan drive signal so as to increase charging ratio of LCD tubes and also can accelerate the pull-down speed of scan drive signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.