Voltage regulation circuit and light emitting didoe driving apparatus having the same
US8917035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 4, 2012 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Aug 30, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage regulation circuit includes a voltage conversion module, an LED driving module and a control module. The voltage conversion module is operable to receive and convert the first voltage to a second voltage. Each LED driving loop of the LED driving module has a current regulator and an LED string. The control module is operable to output a control signal according to the received input signal which reflects the current flowing through the LED driving module. The voltage conversion module regulates the second voltage according to the control signal, such that the regulated second voltage still keeps the brightness of the LED string of each LED driving loop unchanged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.