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Backlight unit, control method thereof, and liquid crystal display device

A technology of a backlight unit and a control method, applied in static indicators, instruments, etc., can solve the problems of many driver chips and high product cost, and achieve the effects of improving contrast, increasing the number of charging times, and reducing power consumption

Active Publication Date: 2021-11-02
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional sub-millimeter light-emitting diode (Mini LED) backlight adopts static drive or passive matrix (PassiveMatrix, PM) drive scheme to achieve local backlight control. Since each area needs to be controlled by a separate data line (dataline), the backlight The number of partitions is generally less than 2000 partitions and too many driver chips are required, resulting in high product costs

Method used

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  • Backlight unit, control method thereof, and liquid crystal display device
  • Backlight unit, control method thereof, and liquid crystal display device
  • Backlight unit, control method thereof, and liquid crystal display device

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Embodiment Construction

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0042] like figure 1 As shown, it is a schematic diagram of the liquid crystal display device of the embodiment of the present application. The liquid crystal display device 100 includes a liquid crystal display panel 10 and a backlight unit 20 . The liquid crystal display panel 10 is disposed opposite to the backlight unit 20 . The backlight unit 20 is used to emit light in different regions, and the brightness of the light emitted by different regions is controlled independe...

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Abstract

The present application provides a backlight unit, its control method, and a liquid crystal display device. The control method includes the following steps: acquiring backlight data corresponding to each partition, where the backlight data includes data of multiple bits; The lighting process of a frame is divided into multiple subfields with different durations, each subfield corresponds to one bit of data, and any two subfields include different numbers of subfields; multiple subfields are output in a preset order. The brightness of the backlight is adjusted by sub-field segmentation to reduce the power consumption of the backlight unit, and by including different numbers of sub-fields in any two sub-fields, the charging times of the light-emitting units of each sub-field in each sub-field are increased, Control the brightness of each partition of the backlight unit more precisely, so that the phenomenon of uneven brightness and darkness disappears.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a backlight unit, a control method thereof, and a liquid crystal display device. Background technique [0002] With the vigorous development of the information society, people's demand for information display is becoming more and more urgent and extensive, and the requirements are becoming more and more stringent. The display technology of the panel industry has developed rapidly since the 1990s and gradually matured. Due to the advantages of high definition, good image color, power saving, light and thin, easy to carry, etc., the flat panel display has been widely used in the above information display products and has a broad market prospect. With the increasingly mature driving technology of the panel industry, opportunities and challenges also follow. Due to the limitations of the backlight of liquid crystal display devices, such as high power consumption and low c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34
CPCG09G3/342
Inventor 王拂依周明忠王照徐枫程刘金风
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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