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1. 发明申请

WO2008099997A1 LUMINANCE AND COLOR TEMPERATURE CONTROL SYSTEM OF LED BACKLIGHT UNIT 审中-公开
标题翻译： LED背光单元的发光和颜色温度控制系统
公开(公告)号：WO2008099997A1
公开(公告)日：2008-08-21
申请号：PCT/KR2007/004031
申请日：2007-08-23
申请人： L & F CO., LTD. , AHN, Min-Hyung , PARK, Hong-Kyu
发明人： AHN, Min-Hyung , PARK, Hong-Kyu
IPC分类号： G02F1/133
CPC分类号： G09G3/3426 , G02F1/133603 , G09G2320/064 , G09G2320/0666 , G09G2360/145
摘要： Disclosed is a luminance and color temperature control system of an LED backlight unit. The system includes: a backlight unit including multiple sub-regions each of which includes a predetermined number of light-emitting diodes, the backlight unit outputting light with specific luminance and specific color temperature by causing the light-emitting diodes included in the respective sub-regions to emit light according to powers input to the respective sub-regions; a light detector installed outside of the backlight unit, the light detector including an image pickup device which detects light output from the backlight unit and converts the detected light into an electrical signal, detecting luminance and color temperature distribution of light output from the respective sub-regions based on light output from the backlight unit, and outputting a detection signal which has a level corresponding to luminance and color temperature of light output from the respective sub-regions; and a controller comparing the level of the detection signal output from the light detector with a prestored reference level corresponding to prestored predetermined luminance and color temperature, and outputting a control signal to control power input to the respective sub-regions in order to change luminance and color temperature of light output from the respective sub-regions based on a result of the comparison, so that the light-emitting diodes in the backlight unit can be controlled in real time to uniformly emit light.
摘要翻译：公开了一种LED背光单元的亮度和色温控制系统。该系统包括：背光单元，其包括多个子区域，每个子区域包括预定数量的发光二极管，背光单元通过使包含在各个子区域中的发光二极管使得包含特定亮度和特定色温的光输出，区域根据输入到各个子区域的功率发光; 光检测器，其安装在所述背光单元的外部，所述光检测器包括：图像拾取装置，其检测从所述背光单元输出的光并将检测到的光转换为电信号;检测从各个子像素输出的光的亮度和色温分布; 基于来自背光单元的光输出的区域，并且输出具有对应于从各个子区域输出的光的亮度和色温的电平的检测信号; 以及控制器，将从光检测器输出的检测信号的电平与预先存储的预定亮度和色温相对应的预存参考电平进行比较，并且输出控制信号以控制输入到各个子区域的功率，以改变亮度和基于比较结果从各个子区域输出的光的色温，从而可以实时控制背光单元中的发光二极管以均匀地发光。

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