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LOCAL DIMMING backlight driving circuit and device, and liquid crystal display equipment

A backlight drive circuit and backlight drive technology, applied in the field of LOCALDIMMING backlight drive circuits, devices and liquid crystal display equipment, can solve the problems of limited application and increased cost of backlight drive

Active Publication Date: 2018-09-28
SHENZHEN TCL NEW-TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A traditional Local dimming driver chip can generally drive 16 channels of LED light strips. In a large-size TV backlight that requires many partitions, it is necessary to configure a corresponding number of driver chips, which increases the cost of the backlight driver and limits the local Application of dimming backlight technology on low-end and mid-end machines

Method used

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  • LOCAL DIMMING backlight driving circuit and device, and liquid crystal display equipment
  • LOCAL DIMMING backlight driving circuit and device, and liquid crystal display equipment
  • LOCAL DIMMING backlight driving circuit and device, and liquid crystal display equipment

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a LOCAL DIMMING backlight driving circuit, a device and liquid crystal display equipment. The circuit comprises L pieces of LED drivers, driving switches in L*N rows, driving switches in L*(16-N) lines and a backlight module, wherein the backlight module comprises L*(16-N) groups of LED light bars, and each group includes N pieces of LED light bars; a plurality of controlling ends of each LED driver are correspondingly connected to controlled ends of N rows of driving switches and (16*N) lines of driving switches; input ends of the driving switches in each row access toa DC power supply; output ends of the driving switches in each row are correspondingly connected to each LED light bar in the (16-N) groups; negative electrodes of the (16-N) groups of LED light barsare correspondingly connected to input ends of the driving switches in (16-N) lines; and output ends of the driving switches in lines are grounded. According to the invention, driving utilization rate of a single LED driver is improved.

Description

technical field [0001] The invention relates to the technical field of backlight display, in particular to a LOCAL DIMMING backlight drive circuit, device and liquid crystal display equipment. Background technique [0002] At present, more and more computers and TVs with backlight drive systems use liquid crystal display devices to Localdimming backlight technology (regional backlight technology), and with the development of technology, the number of backlight partitions tends to increase. A traditional Local dimming driver chip can generally drive 16 channels of LED light strips. In a large-size TV backlight that requires many partitions, it is necessary to configure a corresponding number of driver chips, which increases the cost of the backlight driver and limits the local The application of dimming backlight technology on low-end and mid-end machines. Contents of the invention [0003] The main purpose of the present invention is to provide a LOCAL DIMMING backlight d...

Claims

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Application Information

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IPC IPC(8): G09G3/34
CPCG09G3/3406
Inventor 王伟谢仁礼
Owner SHENZHEN TCL NEW-TECH CO LTD
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