DC voltage conversion circuit and liquid crystal display device including the same
US9960590B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2016 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Sep 11, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The DC voltage conversion circuit includes a booster circuit and a protection circuit. When the booster circuit is under EOS test, a detection circuit of the protection circuit obtains a second detection voltage from the voltage on the VGH line. A first adjustment circuit produces a third signal based on the comparison result of the second detection voltage and a reference voltage. A second adjustment circuit produces a fourth signal based on the comparison result of the second detection voltage and the reference voltage. The third and fourth signals adjust the equivalent resistances of a first and a second feedback circuits to a third and a forth equivalent resistances, respectively. Through the adjustment of the equivalent resistances of the first and second feedback circuits, the voltage of the VGH line is restored to that when no test signal is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.