Color-compensating Fluorescent-LED hybrid lighting
US7498753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Jun 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hybrid fluorescent-LED lighting system comprising a controller, LED elements, fluorescent lamp, and a color/brightness sensor, wherein the color/brightness sensor measures a combined light output of both the fluorescent lamp and the LED elements. A method for controlling the hybrid fluorescent LED lighting system includes receiving a request for brightness/color, setting a fluorescent lamp output to a particular brightness level, setting output of LEDs to a particular brightness level, measuring a combined output of the fluorescent lamp and LEDs; and adjusting the output of LEDs until the total output of the fluorescent lamp and LEDs matches the request for brightness/color. Adjusting the output of LEDs may include the step of driving a specific spectrum range of the LEDs as necessary in order to fill-in variances in a spectrum range of the fluorescent lamp. The method further allows modifying the color of light output. The method also provides a smooth transition from a current state of the lighting system to the received request for brightness/color by over-driving the LEDs beyond a steady state design rating of the LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.