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    • 21. 发明授权
    • Optical feedback system with improved accuracy
    • 光学反馈系统,精度提高
    • US07482567B2
    • 2009-01-27
    • US11575515
    • 2005-08-18
    • Christoph Gerard August HoelenJohannes Petrus Maria AnsemsEdwin Van Lier
    • Christoph Gerard August HoelenJohannes Petrus Maria AnsemsEdwin Van Lier
    • G01J1/32H01J3/14
    • G01J1/04F21K9/62F21V23/0457F21Y2113/13F21Y2115/10G01J1/0407G01J1/32G01J3/505G01J3/513G01J2001/4247H01L25/0753H01L25/167H01L2924/0002H01L2924/00
    • The illumination system has a plurality of light emitters (R, G, B) and a light-collimator (1) for collimating light emitted by the light emitters. Light propagation in the light-collimator is based on total internal reflection (TIR) towards a light-exit window (4) of the light-collimator. At least one light sensor (8) for optical feedback is placed outside the light-collimator and is arranged to receive light emitted by the light emitters exclusively through reflection at the light-exit window of the light-collimator. Preferably, the light sensor is placed substantially coplanar with the light emitters. Preferably, a side wall (35) of the light-collimator is provided with a protruding portion (9) for guiding the light reflected at the light-exit window of the light-collimator towards the light sensor. Preferably, the illumination system is provided with a reflector (12). Preferably, the illumination system comprises a holographic diffuser (17). Accurate sensing of the color mixing of light emitted by the illumination system is obtained.
    • 照明系统具有多个发光体(R,G,B)和用于准直由发光体发射的光的光准直器(1)。 在光准直仪中的光传播基于朝向光准直仪的光出射窗(4)的全内反射(TIR)。 用于光学反馈的至少一个光传感器(8)被放置在光准直器外部,并且被布置成仅通过光准直器的光出射窗处的反射来接收由发光体发射的光。 优选地,光传感器被放置成与发光体基本上共面。 优选地,光准直仪的侧壁(35)设置有用于将在光准直器的光出射窗处反射的光朝向光传感器引导的突出部分(9)。 优选地,照明系统设置有反射器(12)。 优选地,照明系统包括全息漫射器(17)。 获得由照明系统发射的光的颜色混合的精确感测。
    • 22. 发明申请
    • Describing Two Led Colors as a Single, Lumped Led Color
    • 将两个LED颜色描述为单个,集中的LED颜色
    • US20080203945A1
    • 2008-08-28
    • US11914979
    • 2006-05-11
    • Peter Hubertus Franciscus DeurenbergJohannes Petrus Maria AnsemsChristoph Gerard August Hoelen
    • Peter Hubertus Franciscus DeurenbergJohannes Petrus Maria AnsemsChristoph Gerard August Hoelen
    • H05B41/38H05B33/08
    • H05B33/086H05B33/0872
    • A light emitting diode (LED) lighting system for producing white light is disclosed. The system comprises sets of LEDs arranged to emit light with different wavelength ranges and associated with different sets of characteristics, and a driving circuit arranged to drive the LEDs. The driving circuit comprises an input for desired light intensity, color rendering index, and color temperature, an input for signals for LED temperature, a model for determining driving currents for said sets of LEDs from said parameters, signals, and characteristics for each of said sets of LEDs; and a current driver for the LEDs. At least one of the sets of LEDs comprises a first subset of LEDs with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs with a second wavelength sub-range and a second set of characteristics. A lumped wavelength range of the set of LEDs is a range of said first and second wavelength sub-ranges, and the set of characteristics of the set of LEDs is a function of said first and second sets of characteristics. A method for controlling the sets of LEDs is also disclosed.
    • 公开了一种用于产生白光的发光二极管(LED)照明系统。 该系统包括布置成发射具有不同波长范围并且与不同特性集合相关的光的LED组,以及驱动LED驱动LED。 驱动电路包括用于期望的光强度,显色指数和色温的输入,用于LED温度的信号的输入,用于根据所述参数,信号和每个所述的LED的特性确定所述LED组的驱动电流的模型 LED组; 和用于LED的电流驱动器。 所述LED组中的至少一个包括具有第一波长子范围和第一组特性的LED的第一子集,以及具有第二波长子范围和第二组特征的LED的第二子集。 所述一组LED的集总波长范围是所述第一和第二波长子范围的范围,并且所述一组LED的特性集合是所述第一和第二组特性的函数。 还公开了一种用于控制LED组的方法。