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Polychromatic Optical Feedback Control, Stability, and Dimming

机译:多色光学反馈控制,稳定性和调光

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摘要

The use of RGB and RGBA LEDs in luminaires enables a variety of features, such as color temperature-controllable white light, that have not been available in traditional sources. The general illumination market requires that lamp chromaticity be accurately maintained, and therefore an advanced control scheme must be used. Feeding back tristimulus values alone is not enough to maintain precise color control, given the variability of LEDs during changes in ambient temperature, degradation over life, and manufacturing tolerances. In this paper, we discuss a solution based on photodiodes with color filters combined with feedforward temperature compensation and empirical LED data. We also discuss a method to maintain control feedback loop stability and accuracy over the full dimming range.
机译:在照明设备中使用RGB和RGBA LED可以实现多种功能,例如色温可控的白光,这是传统光源所不具备的。通用照明市场要求精确地保持灯的色度,因此必须使用高级控制方案。考虑到环境温度变化期间LED的可变性,寿命退化和制造公差,仅反馈三刺激值不足以维持精确的色彩控制。在本文中,我们讨论了一种基于光电二极管的解决方案,该光电二极管具有彩色滤光片,前馈温度补偿和经验LED数据。我们还将讨论一种在整个调光范围内保持控制反馈环路稳定性和精度的方法。

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