Visible light communication device and method to weaken interference of intense light source

Abstract

The invention discloses a visible light communication device and method to weaken the interference of a intense light source. The visible light communication device to weaken the interference of the intense light source comprises a first light source, a first photosensitive receiving module, a second photosensitive receiving module, a second light source, a first polarizer, a second polarizer, a first controller, a second controller, a first connection port and a second connection port; the input end of the first controller connects the first photosensitive receiving module, the input and output control end connects the first connection port, and the output end connects the first light source; the input end of the second controller connects the second photosensitive receiving module, the input and output control end connects the second connection port, and the output end connects the second light source; the first polarizer is used to block the light with different polarization direction to the first polarizer emitted from the first light source, and only allows the light with the same polarization direction to the first polarizer to pass through; and the second polarizer is used to filter out the polarized light passing through the first polarizer. According to the invention, the polarization direction of the light signal is modulated by installing the polarizer before the intense light signal, so that the interference of the intense light signal is filtered to the maximum limit.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a visible light communication device and method for reducing the interference of strong light sources. Background technique [0002] At present, when solving the strong light signal interference of the main emission source, most solutions use colored filters to filter out light signals of different colors and enhance the intensity of the light signal from the emission source. If the method of filtering with a colored filter is adopted, the light of various colors will affect people's ability to see things, and the feasibility is not high. If the method of enhancing the intensity of the light signal from the emission source is adopted, increasing the light intensity will cause damage to human eyes. Contents of the invention [0003] Aiming at the defects of the prior art, the present invention provides a visible light communication device and metho...

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Problems solved by technology

[0003] Aiming at the defects of the prior art, the present invention provides a visible light communication device and method for reducing the interference of strong light sources, the purpose of which is to modulate the polarization direction of the light signal by installing a polarizer in front of the strong light signal to achieve maximum filtering Eliminate the interference of strong light signals; aim to solve the problem that the use of colored filters in the prior art to filter the light of various colors will affect people's viewing, and the feasibility is not high

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