Light emitting apparatus and control method thereof
US7646154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2006 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Apr 1, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/3725
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for controlling emission of light are provided. The light emitting apparatus comprises a plurality of first light emitting parts which are connected with each other in series, a first current supply which supplies a current to the plurality of first light emitting parts, a plurality of switches which are respectively connected with the plurality of first light emitting parts in parallel to make the current be transmitted to or bypass the first light emitting parts and a controller which receives brightness information corresponding to the respective first light emitting parts and controls the plurality of first switches to make overall light emitting time of the first light emitting parts within time intervals correspond to a brightness level of the brightness information. The present invention provides an apparatus and method for emitting light by driving a plurality of light emitting parts to independently emit light in various brightness levels with a simplified circuit configuration and improved efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.