Lighting color control
US9485826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device includes a plurality of light emitting diodes (LEDs) configured to emit a light. The lighting device further includes a color controller configured to repeatedly assert and deactivate a control signal to control whether one or more LEDs of the plurality of LEDs are turned on or turned off. The color controller asserts the control signal for a first time period and deactivates the control signal for a second time period, where a color of the light emitted by the plurality of LEDs depends on the first time period and the second time period. The color controller changes the color of the light emitted by the plurality of LEDs by changing one or both of the first time period and the second time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.