Dim to warm LED lighting system
US10009974B2 · kind B2 · utility
1Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2017 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | May 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
First and second LED channels of different color temperatures are connected to respective first and second FET drivers. A wall dimmer output is connected to a driver circuit and to circuitry which generates a variable DC voltage. A microcontroller is configured to employ a signal derived from the driver circuit output to generate changing PWM signals which are supplied along with the variable DC voltage to each of the first and second FET drivers to create variable mixed light color and brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.