Semiconductor lighting apparatus
US9198253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2013 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Mar 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor lighting apparatus includes a plurality of semiconductor light emitting devices for outputting light having respective colors, a projector for synthesizing output light of the semiconductor light emitting devices and outputting synthesized light, and a calculating portion. The calculating portion controls a driving current to be supplied to the semiconductor light emitting devices in such a manner that a light quantity detected by optical sensors approximates to a predetermined target light quantity, and calculates a target temperature of the semiconductor light emitting devices to control temperature regulating portions in such a manner that a temperature detected by temperature sensors approximates to the target temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.