GOA circuit based on LTPS semiconductor thin film transistor
US9841620B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2015 |
| Grant date | Dec 12, 2017 |
| Priority date | — |
| Expiry date | Jun 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0289
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a GOA circuit based on LTPS semiconductor thin film transistor to control the voltage levels of the first node, the second node and the third node (Q(n), P1(n), P2(n)) with the forward scan direct current control signal (U2D) and the backward scan direct current control signal (D2U). The clock signal (CK(M)) is merely in charge of the output of the GOA unit of corresponding stage, which can effectively reduce the loading of the clock signal. It ensures that the entire loading of the clock signal after the GOA units of multiple stages are coupled to promote the output stability of the GOA circuit, and to realize the forward-backward scan of the GOA circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.