Light generating device and method for controlling the device
US8766552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2011 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Oct 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light generating device includes: an LED module that includes a number of LED groups each of which has a number of LEDs, a memory for storing drive current for a number of LED groups respectively, an LED module driving unit for driving one of the LED groups, a current controller for controlling the drive current flowing to the LED module driving unit to drive the selected LED group, a temperature sensor for sensing heat created from the selected LED group, an operation unit for calculating the correct drive current when LEDs in the selected LED group emit light, and a key input unit for selecting one of the LED groups or a number of LED groups. The light generating device increases the light emission efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.