LED dimming
US10136488B1 · kind B1 · utility
3Cited by
21References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2017 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Oct 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/59
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Techniques are provided for low, or deep, dimming of a light-emitting diode (LED) load. In an example, a method of adjusting an initial voltage of a driver circuit for an LED load can include providing current to an LED load from a power stage of the driver during an on-time of a pulse-width modulation (PWM) cycle, receiving error current information of the driver circuit at a low-dimming control circuit of the driver, and adjusting a voltage of an output capacitor coupled to the driver during an off-time of the PWM cycle, the charge adjustment based on the error current information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.