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Driving circuit

A technology of driving circuits and resistors, applied in the field of liquid crystal display, can solve the problems of complex circuits, many peripheral circuits, and high cost, and achieve the effects of improving conversion efficiency, simple circuit structure, and reducing costs.

Active Publication Date: 2016-12-21
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a driving circuit to solve the technical problems that the existing driving circuit has many peripheral circuits, complex circuits, large power loss in conversion of different voltages, and high cost

Method used

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Embodiment Construction

[0034] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0035] refer to figure 1 , figure 1 It is a schematic structural diagram of a preferred embodiment of the driving circuit of the present invention;

[0036] The driving circuit of this preferred embodiment includes: a half-bridge resonant module 101, a control module 102, a first transformer M1, a second transformer M2 and a plurality of LED lamps; wherein,

[0037] The half-bridge resonant module 101 is connected to the first transformer M1 and the second transformer M2, the control module 102 is connected to the first transformer M1, the second transformer M2 and the LED lamp, and the second transformer M2 is connected to the LED lamp;

[0038] The half-bridge resonant module 101 is configured to receive an input voltage, and generate a pr...

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Abstract

The invention provides a driving circuit, which comprises a half-bridge resonant module, a control module, a first transformer, a second transformer and a plurality of LED lamps, wherein the half-bridge resonant module is connected with the first transformer and the second transformer, the control module is connected with the transformer, the second transformer and the LED lamps, and the second transformer is connected with the LED lamps. The driving circuit provided by the invention generates a control signal and sends the control signal to the half-bridge resonant module by means of the first transformer, controls the half-bridge resonant module to generate a preset voltage, and outputs the preset voltage to the LED lamps by means of the second transformer; the circuit structure is simpler, the cost is reduced, and the conversion efficiency is improved; and the driving circuit solves the technical problems that the existing driving circuit has multiple peripheral circuits, is complex in circuit, has great power loss of different voltage conversion and is high in cost.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a driving circuit. Background technique [0002] With the continuous advancement of technology, the backlight technology of the liquid crystal display device has been continuously developed. Conventional liquid crystal display devices use cold cathode fluorescent lamps (CCFLs) as backlight sources. However, due to the shortcomings of CCFL backlight such as poor color reproduction ability, low luminous efficiency, high discharge voltage, poor discharge characteristics at low temperature, and long time for heating to reach a stable gray level, backlight technology using LED backlight has been developed. [0003] In an LED backlight source, a special backlight drive circuit is required to provide a drive voltage for the LED string to normally emit light. In the existing large-size TV backlight power supply, the drive circuit is generally driven by a series resonant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H02M3/335H05B44/00
CPCH02M3/33523H02M3/33569H05B45/37Y02B20/30Y02B70/10
Inventor 李文东
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD