Reference voltage generating device, control device including the reference voltage generating device, and LED light emitting device using the control device
US8648545B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2010 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | May 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control device and an LED light emitting device using the same are provided and technology of providing a high contrast ratio to the LED light emitting device and allowing the LED light emitting device to perform a stable operation is disclosed. The LED light emitting device includes a DC/DC converter reference voltage generator that generates a DC/DC converter reference voltage so that a minimum level of a channel voltage having a largest LED voltage drop agrees with a predetermined minimum reference voltage by detecting a plurality of channel voltages corresponding to LED voltage drops of each of a plurality of LED channels LED and an output voltage controller that controls an output voltage of the DC/DC converter using a distribution voltage corresponding to an output voltage and the DC/DC converter reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.