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Visible light communication receiving device

A technology of visible light communication and receiving device, applied in the field of visible light communication, can solve the problems of small aperture of incident light, small position change range, limited practicability of visible light communication system, etc., and achieves improved signal-to-noise ratio, improved reception strength, and good communication function Effect

Inactive Publication Date: 2014-07-02
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

At present, most of the receiving devices used in RGB-LED VLC systems use three lenses to receive light from the light source, and add corresponding filters in front of each lens, because the increase in the number of lenses will reduce the size, resulting in a small light entrance aperture, and the light intensity of each color of light received becomes smaller, so that the receiving distance is limited, and the position change is small, which greatly limits the practicability of the visible light communication system

Method used

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0017] As shown in Fig. 1(a) and Fig. 1(b), the visible light communication receiving device proposed by the present invention includes three parts: a collimating lens, a spectroscopic device and three light detecting and receiving devices. The light emitted from the LED light source is received by the collimator lens, adjusted into a beam of parallel light and enters the beam splitting device. In the beam splitting device, the center position of the mirror should coincide with the optical axis of the collimator lens, and the mirror will move along The parallel light that enters the device along the direction of the optical axis of the collimator lens is received and turned into light perpendicular to the direction of the ...

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Abstract

The invention discloses a visible light communication receiving device based on a RGB-LED wavelength-division multiplexing technology. The visible light communication receiving device comprises a collimated lens, a light-separating device and light detecting receiving devices, wherein, the collimated lens is used for collecting visible light form a RGB-LED light source and adjusts the visible light into parallel lights to enter the light-separating device, the received parallel lights are separated into red light, green light and blue light by the light-separating device, and the light detecting receiving devices are used for receiving and detecting the three kinds of color light. According to the visible light communication receiving device, white light transmitted by the light source is broken into R light, G light and B light through the collimated lens and the light-separating device, different signals are loaded by the light with different colors and are received by the three light detecting receiving devices respectively, and the visible light communication speed is improved greatly.

Description

technical field [0001] The present invention relates to the technical field of visible light communication, in particular to a visible light communication receiving device based on RGB-LED wavelength division multiplexing technology. Background technique [0002] Indoor visible light communication technology is a new type of optical communication technology. With the rapid development of LEDs, it has become an obvious trend for LEDs to replace incandescent lamps and fluorescent lamps for lighting. LED can be used for lighting and communication at the same time, making visible light communication (VLC) a research hotspot in recent years. Nowadays, LEDs commonly used in the market are divided into phosphor LED and RGB-LED. The higher modulation bandwidth can carry different information synchronously through the three-color light, which greatly improves the communication speed and is the development trend of high-speed communication in the future. At present, most of the recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/67
Inventor 施安存孙达刘大畅张雪丽孙悦段靖远
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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