Invention Grant
US08901845B2 Temperature responsive control for lighting apparatus including light emitting devices providing different chromaticities and related methods 有权
包括提供不同色度的发光装置和相关方法的照明装置的温度响应控制

Temperature responsive control for lighting apparatus including light emitting devices providing different chromaticities and related methods
Abstract:
A lighting apparatus may include a plurality of light emitting devices, a temperature sensor, and a compensation circuit. The plurality of light emitting devices may include a first light emitting device configured to emit light having a first chromaticity, a second light emitting device configured to emit light having a second chromaticity different than the first chromaticity, and a third light emitting device configured to emit light having the second chromaticity. Moreover, the first, second, and third light emitting devices may be electrically coupled in series. The temperature sensor may be configured to generate a temperature sense signal responsive to heat generated by at least one of the plurality of light emitting devices. The compensation circuit may be coupled to the third light emitting device, with the compensation circuit being configured to vary a level of electrical current through the third light emitting device relative to the electrical current through the first and second light emitting devices responsive to the temperature sense signal. Related methods are also discussed.
Information query
Patent Agency Ranking
0/0