Illumination driving apparatus for light emitting diode and method thereof
US9066399B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Jan 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided an illumination driving apparatus for a light emitting diode, the apparatus including: a light emitting unit including M number of light emitting diodes (LEDs) connected in series and driven by an output voltage rectified in a rectifying unit; an LED switch unit including N number of LED switches connected in parallel with at least N number of the M LEDs, respectively, and connected in series; an LED switch control signal generating unit comparing the output voltage of the rectifying unit with each of the first to Nth preset reference voltages to generate N number of LED switch control signals controlling the LED switch unit; and an LED switch controlling unit transferring the N number of LED switch control signals to the LED switch unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.