Backlight driving circuit
US7236155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Sep 24, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2855
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight of an LCD device includes a protection circuit that permits leakage of a high voltage to a ground terminal. This high voltage is generated by insertion failures of connectors or other failures caused by damage. The backlight driving circuit includes a high-voltage part applying an A.C. high voltage to a first terminal of a plurality of fluorescent lamps, a low-voltage part applying a lower voltage than that of the high-voltage part to a second terminal of the plurality of fluorescent lamps, a connection part that connects the high-voltage part to the low-voltage part and the protection circuit between the low-voltage part and the connection part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.