Controlled bleeder for power supply
US7605550B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2007 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Sep 12, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/3725
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED backlighting system including: a control circuit; a power source; at least one LED string associated with the power source, the at least one LED string being arranged to be switchably connected to alternatively draw an illumination current from the power source and not draw an illumination current from the power source; and a controlled bleeder arranged to draw a bleed current from the power source responsive to the control circuit; the control circuit being operative to draw the bleed current from the power source via the controlled bleeder for a predetermined time period associated with the alternatively drawing and not drawing the illumination current of the at least one LED string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.