控制可调白光LED为以人为中心的照明

　　控制可调白光LED为以人为中心的照明

　　由于LED照明系统的成熟，它已不再足以简单地提供足够的亮度没有眩光。随着研究清楚地表明，环境光影响人类的生物，注意力转移到控制光源，影响人类的昼夜节律，视力，甚至生产力。

　　在这个人类为中心的照明（HCl）的核心是可调白光LED。然而，设计工程师实施HCl，它是必不可少的，他们开发的电路，暗淡的LED，检测和改变欧凯文温度设置，并仍然管理提供必要的亮度输出。

　　本文将介绍盐酸及其应用，并介绍了英飞凌的Arduino兼容xmc1202 RGB LED照明的盾牌。然后，它将讨论如何屏蔽可用于评估或制作快速原型灯具可调白光LED应用。

　　The light effect

　　HCL relies upon tunable， high-power LEDs and microcontrollers to mimic the changes of natural light during the day. In the morning， light has a reddish color temperature of around 3000 K. By noon it might be 6500 K. In humans， this color temperature change affects the production of several hormones， including melatonin， that play a key role in the human sleep cycle. Melatonin concentrations are higher at night and lower during the day.

　　The eyes also gather light information， in particular the amount of ambient blue light. Specifically， the eyes’ intrinsically photosensitive retinal ganglion cells （ipRGCs） are sensitive to a narrow range of blue light at around 480 nm. Studies have shown that light with a high spectral blue component can activate and increase human performance and concentration. If this blue component in light decreases， the body relaxes and changes over to a calmer， albeit less productive mode.