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Half-duplex time divisionbidirectional visible light communication method and system of RGB LED module

A module and time technology, applied in the field of visible light communication, can solve the problems of optical signal interference, reduce the signal-to-interference noise ratio of the visible light communication system, and achieve the effects of reducing complexity, improving anti-interference ability and saving costs.

Active Publication Date: 2016-07-27
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, the R / G / B LEDs of different colors in these documents are driven independently, and the interference of optical signals will be generated between independently driven LEDs of different colors, which reduces the signal-to-interference-noise ratio of the visible light communication system.

Method used

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  • Half-duplex time divisionbidirectional visible light communication method and system of RGB LED module
  • Half-duplex time divisionbidirectional visible light communication method and system of RGB LED module
  • Half-duplex time divisionbidirectional visible light communication method and system of RGB LED module

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[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] An embodiment of the present invention provides a half-duplex time-division RGB LED module two-way visible light communication method, which includes:

[0031] Time division multiplexing is used to divide time into two time slices of equal length, one of which is for uplink data transmission, and the other time slice is for downlink data transmission;

[0032] Such as figure 1 As shown, in the data transmission of the downlink, by adding a ...

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Abstract

The invention discloses a half-duplex time division bidirectional visible light communication method and system of an RGB LED module. When REB LEDs work in a half-duplex mode, the REB LEDs can transmit data as light sources and also can receive data as photoelectric detectors, and therefore, the cost of the extra photoelectric detectors is reduced. Compared with the method and the system for providing uplink service by using infrared light or WiFi in existing visible light communication, the method and the system have the advantages that extra transmission media are unnecessary, both of an uplink and a downlink transmit the data by using visible light, and the realization complexity of the system is effectively reduced.

Description

technical field [0001] The present invention relates to the field of visible light communication, in particular to a half-duplex time-division RGB LED module two-way visible light communication method and system. Background technique [0002] Visible light communication technology is a communication technology that modulates intensity signals onto visible light LEDs and uses photoelectric detection equipment for detection. Due to its high light efficiency, low power consumption, long service life, and green energy saving, LED is likely to become a new lighting source. On the one hand, the visible light communication technology combined with LED has given full play to the lighting advantages of LED, and at the same time, it combines the communication function with lighting technology, which has attracted extensive attention and research from the scientific community. With the deepening and gradual maturity of research on visible light communication technology, visible light ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04J3/00H04L5/16
CPCH04B10/116H04J3/00H04L5/16
Inventor 李上宾徐正元
Owner UNIV OF SCI & TECH OF CHINA
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