Lighting fixture having two-speed color-changing mechanism
US7497595B2 · kind B2 · utility
23Cited by
29References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Aug 8, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/401
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting fixture having a color-changing mechanism, such as a color wheel, for cycling through a plurality of colors, such as by rotating, at a first speed and a second speed. The second speed is faster than the first speed. A position pulse device, such as a position sensor, generates a reference position pulse when the color-changing mechanism is at a predetermined color or position. A circuit periodically generates a master pulse. A control device causes the color-changing mechanism to cycle through the colors at the second speed when the reference position pulse is generated after the master pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.