Multi-channel LED driver with overheating protection capabilities
US9961742B2 · kind B2 · utility
3Cited by
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24Claims
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Key dates
| Filing date | Apr 4, 2017 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Apr 4, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus to drive a multi-channel light emitting diode (LED) array includes switching transistors connected to LED strings of the multi-channel LED array, error amplifiers connected to the switching transistors, each of the error amplifiers being configured to control current flowing through the LED string to have a target magnitude, and overheating protection circuits connected to the switching transistors, each of the overheating protection circuits being configured to regulate current flowing through a respective switching transistor to have a magnitude less than or equal to the target magnitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.