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A visible light communication system and its application

A visible light communication and optical signal technology, applied in the visible light communication system and application field, can solve the problems of complex structure of the receiving end, inability to meet the needs of smart wear, poor mechanical performance, etc., and achieve light weight, small size, and large application space Effect

Active Publication Date: 2019-01-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the receiving end of the existing visible light communication system to be solved by the present invention has a complex structure and poor mechanical properties, which cannot meet the needs of future smart wearables.

Method used

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  • A visible light communication system and its application
  • A visible light communication system and its application
  • A visible light communication system and its application

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a visible light communication system, including an optical signal transmitting component 2 and a corresponding optical signal receiving component 3 . Such as figure 1 As shown, the optical signal emitting component 2 includes a first electroluminescent component 21, a second electroluminescent component 22, and a third electroluminescent component 23, and the optical signal receiving component 3 includes a first organic photosensitive component 31, a second organic photosensitive component component 32 and a third organic photosensitive component 33 .

[0034] The optical signal emitting component 2 is an electroluminescent component, and the electroluminescent component is at least one of an organic light-emitting diode (OLED), an organic electrochemical cell (LEC), a light-emitting diode (LED), and a cold cathode fluorescent lamp (CCFL). . As an embodiment of the present invention, in this embodiment, the optical signal emitting component 2 ...

Embodiment 2

[0051] This embodiment provides a visible light communication system, such as figure 2 As shown, its structure is the same as that of Embodiment 1, the difference is that it only contains 2 data channels, channel 1 corresponds to the first electroluminescent component 21 and the first organic photosensitive component 31; channel 2 corresponds to the third electroluminescent component 23 and The third organic photosensitive component 33 .

[0052] image 3 In the visible light communication system of this embodiment, the luminescence spectra and external quantum efficiency spectra of the electroluminescent components 21 and 23 , and the absorption response spectra of the organic photosensitive components 31 and 33 are shown.

[0053] It can be seen from the figure that the emission peak of the first electroluminescent component 21 is 640nm, and the corresponding response band of the first organic photosensitive component 31 is at 530-700nm; the emission peak of the third elec...

Embodiment 3

[0056] This embodiment provides a visible light communication system, the structure of which is the same as that of Embodiment 1, except that it only includes one data channel, and channel 1 corresponds to the first electroluminescence component and the first organic photosensitive component.

[0057] The visible light communication system in this embodiment is tested, the modulation signal is input at the first electroluminescent component end, and the data is received at the first organic photosensitive component end. The relationship between the transmission rate and the bit error rate is as follows: Figure 4 As shown, the defined bit error rate is lower than the bit error rate before error correction (pre-FEC, 3.8×10 -3 ) is the limit communication rate that the channel can achieve, which means that when the channel works alone, the visible light communication system can reach 190kb / s.

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Abstract

The invention relates to the field of visible light communication, in particular to a visible light communication system. The visible light communication system comprises a plurality of light signal transmitting assemblies and light signal receiving assemblies in one-to-one correspondence with the light signal transmitting assemblies. The light signal transmitting assemblies are electroluminescent assemblies, and the light signal receiving assemblies are organic photosensitive assemblies. The electroluminescent assemblies can carry different modulating signals with light of different wavelengths. The organic photosensitive assemblies have the advantage of making specific responses to light of a certain waveband and can also accurately receive modulating data transmitted in light channels of different wavebands. Besides, the visible light communication system is small in size and light, meets the development tendency of miniaturization of electrical elements and has a wide application range.

Description

technical field [0001] The invention relates to the fields of optoelectronics and visible light communication, and in particular to a visible light communication system and its application. Background technique [0002] Visible Light Communication technology (Visible Light Communication, VLC) refers to the use of light in the visible light band as an information carrier, without using optical fiber and other wired channel transmission media, and directly transmits optical signals in the air. With the advantages of high information security, rich spectrum resources, and high transmission speed, it is regarded as a strong candidate for future wireless communication technology. [0003] In the research of visible light communication, a communication system that can be used by multiple users at the same time is a research hotspot and difficulty. In the prior art, multi-user visible light communication technology usually adopts wavelength division multiplexing technology, by car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116
CPCH04B10/116
Inventor 董桂芳李文海
Owner TSINGHUA UNIV
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