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LED drive circuit capable of independently controlling illumination and visible light communication

A technology of visible light communication and LED drive, applied in the direction of energy-saving control technology, electrical components, semiconductor lamps, etc., can solve problems affecting the reliability of data transmission, achieve the effect of improving adaptability to different load capacities and increasing signal transmission distance

Active Publication Date: 2020-08-21
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, LED dimming and optical communication modulation are generally implemented by the same group of LED arrays, which will inevitably cause mutual influence between the two and further affect the reliability of data transmission.

Method used

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  • LED drive circuit capable of independently controlling illumination and visible light communication
  • LED drive circuit capable of independently controlling illumination and visible light communication
  • LED drive circuit capable of independently controlling illumination and visible light communication

Examples

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Embodiment Construction

[0032] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] figure 1 It is a circuit structure diagram of an LED driving circuit that can independently control illumination and visible light communication according to the present invention. Such as figure 1 As shown, the present invention is an LED drive circuit that can independently control lighting and visible light communication, including: a DC power supply 1, a current-type BUCK circui...

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Abstract

The invention discloses an LED drive circuit capable of independently controlling illumination and visible light communication. The LED drive circuit comprises a direct-current power supply; a currenttype BUCK circuit used for converting a direct current power supply of a voltage source into a direct current source with controllable and adjustable current amplitude; a parallel MOSFET dimming circuit connected used for realizing PWM dimming of an LED array for illumination dimming under control of the MCU main control circuit; an LED array for illumination and dimming; an optical communicationmodulation MOSFET circuit used for realizing a high-speed modulation function of a transmission signal under control of an optocoupler isolation driving circuit; an LED array for optical communication modulation; a MCU main control circuit used for collecting the current of the current type BUCK circuit, obtaining an external given signal, generating a pulse width modulation control signal for controlling the parallel MOSFET dimming circuit through the PWM generator, and obtaining a high-speed VPPM signal needing to be transmitted to be output; and the optocoupler isolation driving circuit connected with the MCU main control circuit.

Description

technical field [0001] The present invention relates to the field of LED (Light Emitting Diode, light emitting diode) drive technology, in particular to an LED drive circuit that can independently control illumination and visible light communication. Background technique [0002] LED (Light Emitting Diodes) has many advantages such as energy saving, long life, environmental protection, and fast response, and is a lighting source with superior performance. Visible Light Communication technology (Visible Light Communication, VLC) is a new type of wireless communication technology that loads specific signals on the intensity of light for transmission based on the fast response speed and easy modulation characteristics of LEDs, and realizes the dual functions of lighting and communication at the same time. . Combining LED lighting with visible light communication to realize the integration of lighting communication can further expand the application prospects of LED. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/10H05B45/325H05B47/155H05B47/195H05B47/165H04B10/116
CPCH05B45/10H05B45/325H05B47/155H05B47/195H05B47/165H04B10/116Y02B20/40
Inventor 鲍建宇
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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