Unlock instant, AI-driven research and patent intelligence for your innovation.

Visible light communication LED light source with adjustable modulation bandwidth

A technology of visible light communication and LED light source, which is applied in the field of visible light communication, can solve the problems of weakened equalization effect of LED devices, attenuation of modulation bandwidth and luminous efficiency, unsatisfactory practicability, etc., and achieves low production cost, improved communication quality, and simple design structure Effect

Active Publication Date: 2017-09-05
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the modulation bandwidth and luminous efficiency of the LED device itself are not constant. As the use time increases and the use environment deteriorates, the modulation bandwidth and luminous efficiency of the LED device will gradually decay, and the equalization effect of the module on the LED device will also weaken.
Therefore, the practicality of this method is not ideal in the case of prolonged use or extreme environment use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Visible light communication LED light source with adjustable modulation bandwidth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] see figure 1 As shown, the present invention provides a visible light communication LED light source with adjustable modulation bandwidth, including:

[0017] An LED device 1 for visible light communication is a light-emitting diode based on GaN or GaAs material, its electrical structure is forward p-type-MQW-n type, and its packaging structure is a flip-chip structure, a front-mount structure or a vertical structure.

[0018] A DC blocking capacitor 2, whose capacitance is higher than 10pF, is used to block the constant current driving the LED device 1 from passing through, so as to avoid the DC loss caused by the parallel circuit.

[0019] An adjustable resistor 3 is a SMD or in-line potentiometer, and its function is to change the transmission characteristics of the LED device 1 to realize the adjustable balanced bandwidth.

[0020] Wherein the DC blocking capacitor 2 is connected in series with the adjustable resistor 3, the DC blocking capacitor 2 and the adjustab...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a visible light communication LED light source with an adjustable modulation bandwidth. The visible light communication LED light source with the adjustable modulation bandwidth comprises an LED device for visible light communication, a blocking capacitor and an adjustable resistor; the blocking capacitor is connected to the adjustable resistor in series; the blocking capacitor is connected to the adjustable resistor and the LED device in parallel; the anode of the LED device and one end of the blocking capacitor are input terminals; and the cathode of the LED device and one end of the adjustable resistor are output terminals. The visible light communication LED light source with the adjustable modulation bandwidth is applicable to LED devices of different bandwidths and different impedance characteristics, and can improve communication quality of the visible light communication light source in an extreme environment.

Description

technical field [0001] The invention belongs to the technical field of visible light communication, and in particular relates to a visible light communication LED light source with adjustable modulation bandwidth. Background technique [0002] Visible light communication has the remarkable characteristics of high transmission rate, no electromagnetic radiation, low energy consumption, rich spectrum, and high confidentiality, and has become a hot spot for short-distance free space communication. Visible light communication light source is one of the keys to the communication system, and its role is to convert electrical signals carrying specific information into optical signals without electromagnetic radiation pollution. The visible light communication LED light source of the present invention uses LED devices based on GaN or GaAs materials, while commercial GaN or GaAs-based LEDs are affected by the RC time and carrier life of the device itself, and the available modulation...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H05B33/08H04B10/116H04B10/50H05B44/00
CPCH04B10/116H04B10/502H05B44/00Y02B20/30
Inventor 曹海城杨超朱石超林杉赵丽霞
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI