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In public places, sometimes we need to touch the switch in order to turn on the light.However, the
touch of countless people will make the switch full of all kinds of bacteria, especially in hospitals,
dirty switch may help to spread diseases.Therefore, our team try to allow people to control the light
without touching the switch. People just need to gently wave their hands to “cut” the red light beam
emitted from the switch in order to control lights. We think this is a very effective way to avoid the
trouble brought by the dirty switch in public places.
Li Jiangchun , He Yuxiao , Xu Yangjie