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CHEN Chang Ying introduced the principle of the study is to semiconductor lighting technology and optical communication technology, using the white LED features a high speed switch , the information modulated onto the LED lights on the realization of " a light where you can download the information ." .
Original , light and radio waves used , all belong to an electromagnetic wave , communication network signal is the same basic principle . To ordinary LED bulbs installed driver chips , you can control it millions of times per second, flashing lights indicating a , off represents 0 . Since the frequency is too fast, the human eye can not perceive , light sensors , but can receive these changes. In this way, the data is binary encoded into light signals quickly and carried out effectively transmitted. Lighting of the computer, through a special receiver , you can receive the light where additional information.