GOA circuit over-current protection system and method thereof
US10332469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2017 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Sep 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a GOA circuit over-current protection system and method thereof. The over-current protection system for a GOA circuit, which comprises a power management chip and a level-shift chip. The level-shift chip comprises an over-current protection module. The over-current protection module comprises a current comparator, an AND gate circuit, a rising edge pulse delay circuit, a power supply, a voltage comparator, a first switch and a second switch, and a capacitor. With the current comparator to detect a current on the wiring of the clock signal in the GOA circuit, when the current on the wiring of the clock signal in the GOA circuit is too high, the power supply is controlled for charging the capacitor. With the voltage comparator to detect both ends of the capacitor (the first node voltage), when the first node voltage is too high, an over-current protection control signal is outputted to the power supply management chip to control the power management chip to stop supplying power to the GOA circuit, to perform an over-current protection of the GOA circuit, to avoid the melted phenomenon caused by the short circuit of the GOA circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.