Self-healing gate driving circuit having two pull-down holding circuits connected via a bridge circuit
US9257083B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Mar 15, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The claimed invention is related to a self-healing gate driving circuit. The self-healing gate driving circuit includes a plurality of GOA units connected in cascade. The N-th level GOA unit includes a pull-up control circuit 100, a pull-up circuit 200, a transfer-down circuit 300, a pull-down circuit 400, a boast capacitor 500, a first pull-down holding circuit 600, a second pull-down holding circuit 700 and a bridge circuit 500. The bridge circuit 800 includes the first TFT T55, and the gate of the TFT T55 connects to the gate signal point Q(N), and the drain and the source of the TFT T55 respectively connects to the first circuit point K(N) and the second circuit point P(N). During the operation, the first circuit point K(N) and the second circuit point P(N) are alternatively configured to be at a high potential. The self-healing gate driving circuit of the claimed invention can decrease the failure risk of the pull-down holding circuit due to the manufacture process or a long term operation of GOA circuit, and perform the function of the circuit self-healing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.