Optical communication device based on white light LED illumination

Abstract

The invention provides an optical communication device based on white light LED illumination. A communication function is achieved through an LED illuminating lamp array, cost is low, energy is saved, and the environment is protected. The optical communication device based on the white light LED illumination comprises a transmitting end and a receiving end, wherein the transmitting end comprises an LED modulation driving circuit connected with the LED illuminating lamp array, and the receiving end comprises an LED optical communication receiving circuit. The LED modulation driving circuit comprises a full-wave rectification bridge composed of four diodes capable of being connected into an alternating current power supply, the direct current voltage output end of the full-wave rectification bridge is connected with an energy-storage capacitor in parallel, the two ends of the energy-storage capacitor are connected with a filter circuit, the output end of the filter circuit is connected with a light modulation driving chip, a switch control pin of the chip is connected with the negative electrode of the LED illuminating lamp array, a switch pin of the chip is connected with the negative electrode of a voltage stabilizing diode and one end of an inductor, and the other end of the inductor is connected with the negative electrode of the LED illuminating lamp array and one end of a protective capacitor. The LED optical communication receiving circuit comprises a PIN photoelectric detector, an amplifying circuit and a signal processing unit.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an optical communication device based on white light LED illumination. Background technique [0002] In recent years, LED lights, as a low-carbon, energy-saving, and environmentally-friendly lighting equipment, have gradually been understood by people, and are also a strategic emerging industry that is vigorously supported by the state and local governments in the field of intelligent lighting. LED is favored by the industry for its bright and rich colors, long life and strong safety performance, and gradually eliminates ordinary lighting lamps (such as incandescent lamps) from the lighting market. Experts predict that around 2015, LED lighting will be popularized. A few days ago, a research report showed that: LED lighting research has a new technology breakthrough, which can directly connect to broadband network through LED lighting. [0003] LED lights are different from...

AI Technical Summary

Problems solved by technology

As a semiconductor device, LED is characterized by its high-speed on-off capability, that is, the on-off capability of the switch, while incandescent lamps are easily damaged during the on-off change process, and the on-off change action is too slow, so they do not have This communication function

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