A visible light communication method, sending device and system

Abstract

The invention discloses a visible light communication method, sending device, receiving device and system. A sending end for visible light communication enables transmitted communication information to be modulated line by line to an original image signal to generate modulation image signals, and the modulation image signals are displayed in a line-by-line scanning manner; and a receiving end for visible light communication collects the modulation image signals, scans the modulation image signals line by line and demodulates the communication information in the modulation image signals. According to the technical scheme, the transmitted communication information is modulated to the original image signal line by line to generate the modulation image signals, and then, the modulation image signals are displayed in a line-by-line scanning manner, so that when the transmitted communication information is demodulated, the transmitted communication information of the lines can be demodulated as long as the lines in the modulation image signals are collected without capturing a complete image frame, and requirement for time synchronization of the visible light communication system can be reduced.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a visible light communication method, a sending device, a receiving device and a system. Background technique [0002] Wireless communication technology allows users to rely on wireless signals to communicate without the need to arrange complex signal transmission lines. It is more and more widely used in daily life due to its convenience and quickness. With the increasingly serious problems of network frequency band resources, network interference, and network leaks, users are increasingly demanding wireless communication technologies that can overcome the above problems. Visible Light Communication (VLC) is one of them. . Visible light communication technology is a wireless communication technology that uses visible light as an information carrier and uses high-speed modulated light wave signals to transmit information. [0003] Existing visible light com...

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Problems solved by technology

[0004] However, in the existing visible light communication method, it is necessary to capture a complete image frame every time in order to demodulate a complete piece of information carried by the image frame from a complete image frame, which requires the shooting of the image frame The device and the display device ensure strict time synchronization, so that the image frame can be captured just when the display device displays a complete image frame, and this time synchronization is difficult to control, so this time synchronization has higher requirements for the visible light communication system. high

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