Adaptive switch mode LED system
US8710752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2011 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Nov 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system that provides an intelligent approach to driving multiple strings of LEDs. A processing device determines an optimal current level for each LED string from a limited set of allowed currents. The processing device also determines a PWM duty cycle for driving the LEDs in each LED string to provide precise brightness control over the LED string. The settings for the current level and duty cycle are transmitted to an LED driver for regulating the current and on-off times of the LED strings. Beneficially, the system reduces the size of the LED driver while leveraging existing resources available in the processing device to operate the LEDs in a power efficient manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.