Lighting devices including boost converters to control chromaticity and/or brightness and related methods,申请号US201213370776-传众专利搜索

Lighting devices including boost converters to control chromaticity and/or brightness and related methods

申请公布号：US8823285(B2)

申请号：US201213370776

申请日期：2012.02.10

申请公布日期：2014.09.02

申请人：

Cree, Inc.

发明人：Chobot Joseph P.

分类号：H05B37/02

主分类号：H05B37/02

代理机构：

Myers Bigel Sibley & Sajovec, P.A.

代理人：Myers Bigel Sibley & Sajovec, P.A.

地址：Durham NC US

摘要：A solid state lighting device may include a power supply, a light emitting device, and a boost converter. The boost converter may have an input node electrically coupled to the power supply and an output node with the light emitting device electrically coupled between the output node and a reference node. The boost converter may include a switch electrically coupled in a current shunting path between the input node and the reference node, and a controller. The switch may be configured to shunt current from the power supply around the light emitting device. The controller may be configured to generate a pulse width modulation (PWM) signal to control a duty cycle of the switch to provide a pulse width modulated electrical current through the switch and a continuous electrical current through the light emitting device. Related methods are also discussed.

主权项：1. A device comprising: a power supply; a light emitting device; and a boost converter having an input node electrically coupled to the power supply and having an output node, with the light emitting device electrically coupled between the output node and a reference node, wherein the boost converter comprises, a switch electrically coupled in a current shunting path between the input node and the reference node, wherein the switch is configured to shunt current from the power supply around the light emitting device, anda controller configured to control a duty cycle of the switch to provide a pulse width modulated electrical current through the switch and a continuous electrical current through the light emitting device, wherein the controller is configured to control the duty cycle of the switch to provide the pulse width modulated electrical current as a pulsed current through the switch while providing the continuous electrical current through the light emitting device as a non-pulsed current through the light emitting device.