Color temperature compensation for LED lighting illumination

Chia-Te Chou, C. Lee, C. Juan, T. Lin, M. Tsai
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引用次数: 3

Abstract

The paper presents both chrominance uniformity and color temperature compensation for RGB LED lighting illumination. A self-developed color optical sensing module and an integrating sphere were used to measure the color characteristics of LED pixels. Firstly, the transfer coefficients for each color measurement were calibrated. A calibrated sensing module was applied to inspect the color characteristics of 3 in 1 color LED modules. With the required target color chrominance or color temperature, the compensated RGB lighting ratio can be derived according to the mixed light formula associated with original RGB measurement. The experimental results from the 4×4 LEDs show that the deviation of white chrominance by using a 3 in 1 LED module is about 0.1001 before compensation, but the average color deviation is reduced to 0.002 and the average color temperature deviation is less than 71K after compensation by using the proposed method.
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LED照明照明的色温补偿
本文提出了RGB LED照明的色度均匀性补偿和色温补偿。采用自主开发的彩色光学传感模块和积分球对LED像素的颜色特性进行了测量。首先,对每个颜色测量值的传递系数进行校准。采用标定后的传感模块对3合1彩色LED模块的色彩特性进行检测。有了所需的目标色度或色温,就可以根据原始RGB测量相关的混合光公式推导出补偿后的RGB光照比。4×4 LED的实验结果表明,采用3合1 LED模组补偿前的白色度偏差约为0.1001,而采用该方法补偿后的平均色偏差降至0.002,平均色温偏差小于71K。
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