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LED power supply circuit

A technology of LED power supply and LED drive, applied in the direction of electrical components, etc., can solve the problems of increasing the internal circuit space and increasing the cost of the LED light source circuit, and achieve the effect of reducing the increased internal circuit space and reducing the cost

Pending Publication Date: 2021-08-27
QISDA SUZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there will be many groups of DC-DC conversion circuits in the internal circuit space to divide the work and process this action, which will increase the internal circuit space occupied by the LED light source circuit and increase the cost.

Method used

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Embodiment Construction

[0022] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0023] Please refer to figure 1 , figure 1 It is a schematic diagram of the principle of the LED power supply circuit of the present invention. The LED power supply circuit of the present invention includes: an AC-DC conversion circuit module 100 , an LED drive control chip 200 and an LED light bar 300 . Wherein, the light bar 300 is electrically connected with the AC-DC conversion circuit module 100 and the LED drive control chip 200 respectively, and the present invention adjusts the driving voltage of the light bar 300 through the AC-DC conversion circuit module 100 and the LED drive control chip 200 .

[0024] Please continue to refer to figure 1 , the AC-DC conversion circuit module 100 includes a conversion circuit 110, a TL431 circuit 120, a first resistor R1...

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Abstract

The invention discloses an LED power supply circuit. The LED power supply circuit comprises an LED light bar; an LED driving control chip which is electrically connected with the LED light bar and is used for adjusting the brightness of the LED light bar; an alternating current-direct current conversion circuit module which comprises a conversion circuit, wherein the conversion circuit is electrically connected with the LED light bar and used for converting commercial alternating current into direct current to serve as input voltage of the LED light bar; wherein the alternating current-direct current conversion circuit module further comprises a TL431 circuit, the LED driving control chip is electrically connected with the TL431 circuit, and the LED driving control chip outputs a first voltage to the TL431 circuit so as to adjust the magnitude of the input voltage of the LED light bar. According to the LED power supply circuit, the brightness adjustment of the LED can be realized only through two circuit modules, namely the alternating current-direct current conversion circuit and the LED driving chip. A plurality of groups of direct current-direct current conversion circuits are omitted, the internal circuit space occupied by the LED brightness adjusting circuit is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to an LED power supply circuit, in particular to an LED power supply circuit capable of adjusting the brightness of the LED. Background technique [0002] Although the size of the current display device tends to be larger and larger, its functions are also increasing, resulting in smaller and smaller internal circuit space. Many customers have limited customized designs or added functions. If we can reduce the space of the LED power supply circuit, we can make better use of the internal space. [0003] The current LED power supply circuit mainly realizes LED brightness adjustment through three major structures: AC-DC conversion circuit, DC-DC conversion circuit and LED driver chip. The current driving principle of LED brightness adjustment is to use an LED driver chip to connect to a DC-DC conversion circuit, wherein the LED driver chip adjusts the LED driving voltage through a feedback terminal. Therefore, there will be many g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/30H05B45/10
Inventor 郭文豪蔡东宪王博文蔡政嵚
Owner QISDA SUZHOU
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