公开(公告)号：US07473879B2

公开(公告)日：2009-01-06

申请号：US10979058

申请日：2004-11-01

申请人： Fook Chuin Ng ,  Kee Yean Ng ,  Heng Yow Cheng

发明人： Fook Chuin Ng ,  Kee Yean Ng ,  Heng Yow Cheng

IPC分类号： G01J1/32

CPC分类号： H05B33/0869 ,  F21K9/00 ,  F21V23/0457 ,  F21Y2115/10 ,  H05B33/0821

摘要： A light source and method for controlling the same is disclosed. The light source includes a first component light source that includes N LEDs, a photo-detector, and a light redirector, where N>1. Each LED has a light emitting chip in a package. The light emitting chip emits light in a forward direction and light in a side direction. The light generated in the forward direction is determined by a drive signal coupled to that LED. A portion of the light in the side direction leaves the package. The light redirector is positioned such that a portion of the light in the side direction that leaves the package of each of the LEDs is scattered onto the photo-detector. The photo-detector generates N intensity signals, each intensity signal having an amplitude related to the intensity of the light emitted in the side direction by a corresponding one of the LEDs.

摘要翻译： 公开了一种光源及其控制方法。 光源包括N个LED的第一分量光源，光检测器和光重定向器，其中N> 1。 每个LED在封装中具有发光芯片。 发光芯片沿向前方向发光，在侧面方向发光。 在正向生成的光由耦合到该LED的驱动信号确定。 侧面方向的一部分光离开包装。 光重定向器被定位成使得离开每个LED的封装的侧方的光的一部分被散射到光检测器上。 光检测器产生N个强度信号，每个强度信号具有与相应的一个LED在侧向发射的光的强度相关的振幅。