Light source driving device
US11751309B2 · kind B2 · utility
0Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2020 |
| Grant date | Sep 5, 2023 |
| Priority date | — |
| Expiry date | Mar 10, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source driving device performs a switching control on a third switch of a second control unit by using a control signal of a fourth control unit (overvoltage protection circuit), so as to allow the third switch to be turned on by the control signal of the fourth control unit only in a partial section in which an overvoltage occurs, and then turns off the third switch, thereby quickly releasing the blocking of light emission from the light source so as to be capable of returning to a light emitting state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.