Method and device for realizing visible light communication by using backlight of liquid crystal display device

• Main Authors: ZHANG YUXIN, LIU WEIDONG, SONG ZHICHENG
• Format: Patent
• Language: Chinese; English
• Published: 22.02.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The embodiment of the invention provides a method and device for realizing data modulation in visible light communication by using a backlight of a liquid crystal display device, and the liquid crystal display device. The method comprises the following steps: converting original data into modulated data of a binary code numerical code in which a duty ratio is a constant value according to a specific decoding mode, then loading the modulated data in a dimming signal of LED backlight, receiving the dimming signal containing the modulated data by using a photosensitive diode with very high sensitivity, and decoding the modulated data according to a corresponding decoding mode to obtain the original data. Therefore, by adoption of the method and device provided by the invention, on the premise of ensuring the brightness stability of the backlight, information transmission is completed by the LED backlight in the field of visible light communication is achieved. 本申请实施例中提供的利用液晶显示装置背光源实现可见光通信中的数据调制方法及装置、及液晶显示装置，其中，通