GOA circuit for LTPS-TFT
US9916805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2016 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Oct 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0214
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a GOA circuit for LTPS-TFT, by adding the twelfth and thirteenth TFTs (T12, T13) controlled by output ends (G(n−1), G(n+1)) of (n−1)-th and (n+1)-th GOA units, the drain of twelfth TFT T12 connected through the fourth node (W1(n)) to source of first TFT (T1), the drain of first TFT (T1) connected to output end of (n−1)-th GOA unit, the drain of thirteenth TFT (T13) connected through the fifth node W2(n) to source of third TFT (T3), the drain of third TFT (T3) connected to output end of (n+1)-th GOA unit; the first and third TFTs (T1, T3) controlled respectively by the forward and backward scan DC control signals (U2D, D2U) to reduce leakage of twelfth TFT (T12) in forward scanning and leakage of thirteenth TFT (T13) in backward scanning. As such, the leakage in key TFTs is reduced and GOA circuit stability is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.