公开(公告)号：US20140111091A1

公开(公告)日：2014-04-24

申请号：US14144298

申请日：2013-12-30

Applicant: Zdenko Grajcar ,  Brad Klassen ,  Leif Erickson

Inventor： Zdenko Grajcar ,  Brad Klassen ,  Leif Erickson

IPC: H05B33/08

CPC classification number: H05B33/0851 ,  H05B33/0809 ,  H05B33/0824 ,  H05B33/083 ,  H05B33/0857 ,  H05B37/0227

Abstract: Apparatus and associated methods involve operation of an LED light engine in which a relative intensities of selected wavelengths shift as a function of electrical excitation. In an illustrative example, current may be selectively and automatically diverted substantially away from at least one of a number of LEDs arranged in a series circuit until the current or its associated periodic excitation voltage reaches a predetermined threshold level. The diversion current may be smoothly reduced in transition as the excitation current or voltage rises substantially above the predetermined threshold level. A color temperature of the light output may be substantially changed as a predetermined function of the excitation voltage. For example, some embodiments may substantially increase or decrease a color temperature output by a solid state light engine in response to dimming the AC voltage excitation (e.g., by phase-cutting or amplitude modulation).

Abstract translation: 设备和相关方法涉及LED光引擎的操作，其中所选波长的相对强度作为电激发的函数而移动。 在一个示例性的示例中，电流可以被选择性地并且自动地转移到布置在串联电路中的多个LED中的至少一个，直到电流或其相关联的周期性激励电压达到预定阈值电平。 当励磁电流或电压大大高于预定阈值电平时，转换电流可以平滑地减小。 光输出的色温可以基本上随着激励电压的预定函数而改变。 例如，一些实施例可以响应于调光AC电压激励（例如，通过相位切割或幅度调制）来显着地增加或减少由固态光引擎输出的色温。