Light-emitting diode driving device and short protection method for driving device
US9781806B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2016 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Nov 24, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting diode (LED) driving device and a short protection method for a driving device are provided. The driving device includes an LED module, a driving circuit, a reference voltage setting circuit, a voltage comparison circuit, and a power supply. A first node of the LED module receives a lighting voltage, and a second node of the LED module has a first voltage. The reference voltage setting circuit receives the lighting voltage to generate a reference voltage. The voltage comparison circuit determines whether the first voltage is greater than the reference voltage when the LED module is turned off. When the first voltage is greater than the reference voltage, the voltage comparison circuit generates a short signal. The power supply supplies power to the LED module and determines whether to shut down the power of the LED driving device according to the short signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.