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High-power LED constant-current source dimming circuit

A technology of dimming circuit and constant current source, applied in the field of high-power LED constant current source dimming circuit, which can solve the problems of difficult dimming and low power of constant current source, etc.

Inactive Publication Date: 2017-06-09
何志杰
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the power of the constant current source generally used for LED in foreign countries is small, and the dimming is difficult to stabilize.

Method used

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  • High-power LED constant-current source dimming circuit
  • High-power LED constant-current source dimming circuit
  • High-power LED constant-current source dimming circuit

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Embodiment Construction

[0014] exist figure 1 Among them, the high-power LED constant current source dimming circuit system is composed of single-chip microcomputer, digital potentiometer, V / I conversion constant current source, high-power LED lamp, keyboard, and display device. Use the 89C52 single-chip microcomputer to read the keyboard information, obtain the requirements, obtain the control information through calculation, and transmit this information to the display and digital potentiometer X9312U respectively, modify the value stored in the X9312U, and then pass through the V / I conversion circuit to obtain the LED system. The required adjustable constant current signal controls the dimming of high-power LED lamps.

[0015] exist figure 2 Among them, the LED constant current dimming hardware circuit is composed of single chip microcomputer and X9312U, liquid crystal display and keyboard interface circuit, U / I circuit and adjustment circuit.

[0016] In the interface circuit between the singl...

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Abstract

The invention relates to a high-power LED constant-current source dimming circuit system. The high-power LED constant-current source dimming circuit system is composed of a single-chip microcomputer, a digital potentiometer, a V / I conversion constant current source, a high-power LED lamp, a keyboard and a display device. The 89C52 single-chip microcomputer is adopted to read the information of the keyboard; requirements are acquired; control information is obtained through operation; the information is transmitted to the display device and the digital potentiometer X9312U; the value of the memory of the X9312U is modified; the information passes through an V / I conversion circuit, so that adjustable constant current signals required by an LED system can be obtained; and the dimming of the high-power LED lamp can be controlled. The high-power LED constant-current source dimming circuit system has the advantages of stable dimming, economical performance and high practicability.

Description

technical field [0001] The invention relates to a dimming circuit, in particular to a high-power LED constant current source dimming circuit. Background technique [0002] LED is an internationally recognized energy-saving, environmentally friendly, high-efficiency, and long-life lighting source. With the advancement of LED technology, it is gradually being applied to various fields. At present, the competition in the LED lighting industry is in full swing. All countries focus on the field of high-power and high-brightness white LEDs. Energy saving and emission reduction is the theme of the times. LEDs with the same brightness can save more than 80% energy than traditional light sources. Therefore, using LED light sources Not only is it more economical, but it can also greatly reduce the discharge of pollutants. Furthermore, it is not convenient to adjust the brightness of the same pattern as the light source, which is also an aspect of wasting energy. [0003] High-power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCY02B20/30
Inventor 何志杰
Owner 何志杰
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