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Backlight driving circuit, driving method and display device of display device

A technology for backlight driving circuits and display devices, applied in static indicators, instruments, etc., can solve problems such as circuit instability, fire, and constant current chip burning, and achieve the effect of ensuring stability and reducing maintenance costs.

Active Publication Date: 2019-01-25
HEFEI HUIKE JINYANG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a driving circuit for a display device, which aims to solve the problem of short-circuit of the LED lamp group, causing the constant current chip of the backlight driving circuit to be burned, making the entire circuit unstable, and even causing a fire, and increasing the after-sales maintenance of the display device cost problem

Method used

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  • Backlight driving circuit, driving method and display device of display device
  • Backlight driving circuit, driving method and display device of display device
  • Backlight driving circuit, driving method and display device of display device

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solution of the application, the technical solution in the embodiment of the application will be clearly described below in conjunction with the drawings in the embodiment of the application. Obviously, the described embodiment is the Some examples, but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0038] The terms "comprising" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method or system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally further includes Other steps or unit...

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Abstract

The embodiment of the present application provides a backlight driving circuit of a display device, a driving method and a display device. The backlight driving circuit comprises a backlight lamp group, a positive electrode of the backlight lamp group is connected with a power supply control circuit, and a negative electrode of the backlight lamp group is connected with a driving output terminal pin of a driving chip. A power control circuit connected with the backlight lamp group; a driving chip, wherein the driving output terminal pin of the lamp group of the driving chip is connected with the negative electrode of the backlight lamp group; the protection circuit comprises a comparator, an input end of the protection circuit is connected with a negative electrode of the backlight lamp group, an output end of the protection circuit is connected with an enabling end of the driving chip, and when the comparator judges the the circuit current is greater than a protection threshold value,the protection circuit controls the driving chip to stop working; by controlling the level signal at the enable terminal, the driver chip stops working, and the driver chip is protected from being burned when the backlight driver circuit is short-circuited or the current is too large.

Description

technical field [0001] The embodiments of the present application belong to the field of display technology, and in particular relate to a backlight driving circuit of a display device, a driving method and a display device. Background technique [0002] With the continuous development of display technology, the backlight module of the display device basically uses a light group composed of Light Emitting Diode (LED) as the backlight source, and the LED light group is driven by the backlight drive circuit to display. The existing drive circuit includes power control circuit and constant current chip. [0003] Due to the different sizes of the display devices, the voltage required by the LED lamp group varies widely. When the backlight drive circuit outputs a large current or high voltage, it is easy to short-circuit the LED lamp group, causing the constant current chip of the backlight drive circuit to be burned. The entire circuit is unstable, and even causes a fire, incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/3406G09G2330/04
Inventor 王智勇王平
Owner HEFEI HUIKE JINYANG TECH
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