LED driver
US9131553B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | May 10, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED driver described herein can determine whether it is operating in z soft-start process by comparing a first threshold value and a soft-start reference value. In the soft-start process, the inductor current and the LED driving current can be soft-started periodically to effectively avoid current overshoot. In addition, the end of the soft-tart operation can be controlled based on a comparison result of the first threshold value and the reference value of the soft-start, and without any external settings. Thus, the end of soft-start operation can automatically be determined with strong controllability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.