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LCD device and driving method of its backlight module

A liquid crystal display device and backlight module technology, which is applied in optics, nonlinear optics, static indicators, etc., can solve the problems of reducing screen brightness, changing color temperature, affecting the display quality of liquid crystal display devices, and the user's viewing comfort of the screen. The effect of increasing cost, increasing visual comfort, and improving overall quality

Inactive Publication Date: 2009-12-23
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the black insertion technology that inserts low gray scale or full black screen will reduce the brightness of the screen display, and the deviation of gray scale will lead to the change of color temperature
When the liquid crystal display device is switched from the general display mode to the display mode using the black insertion technology, or when switching from the display mode using the black insertion technology to the general display mode, the user will obviously feel the change of the screen brightness and color temperature, so Will greatly affect the display quality of the liquid crystal display device and the comfort of the user watching the screen

Method used

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  • LCD device and driving method of its backlight module
  • LCD device and driving method of its backlight module
  • LCD device and driving method of its backlight module

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Embodiment Construction

[0027] According to a preferred embodiment of the driving method of the liquid crystal display device and its backlight module of the present invention, at least one first light source is driven when the liquid crystal display device is in the normal display mode, and the aforementioned The first light source and at least one second light source. The first light source and the second light source have different color temperatures, so that the backlight module provides backlights with different color temperatures and brightnesses to the display panel in different display modes, so that the liquid crystal display device has substantially different color temperatures in the normal display mode and black insertion display mode. The same display color temperature and display brightness.

[0028] A preferred embodiment will be proposed below as a detailed description of the present invention, but this embodiment is only used as an example for illustration, and does not limit the sco...

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Abstract

The invention discloses a liquid crystal display device and a driving method of a backlight module thereof. The liquid crystal display device includes a display panel and a backlight module. The backlight module includes a first light source, a second light source and a driving circuit. When the liquid crystal display device is in the normal display mode, the driving circuit drives the first light source so that the backlight module provides the first backlight to the display panel. When the liquid crystal display device switches to the black insertion display mode, the driving circuit simultaneously drives the first light source and the second light source so that the backlight module provides mixed backlight to the display panel. The color temperature and brightness of the mixed backlight are different from the color temperature and brightness of the first backlight, so that the display color temperature and display brightness of the liquid crystal display device in the black insertion display mode are substantially equal to the display color temperature and display brightness of the liquid crystal display device in the normal display mode. Display brightness.

Description

technical field [0001] The invention relates to a liquid crystal display device and a driving method of a backlight module thereof. Background technique [0002] With the advancement of flat panel display technology, thinner display devices, such as LCD TVs and LCD screens, have gradually entered people's daily life. Due to factors such as improved image quality and lower prices, more and more consumers choose liquid crystal displays as display devices for personal computers. In response to various demands from consumers, the industry has been striving to develop liquid crystal displays with wider viewing angles, wider color gamut and shorter response time. [0003] Response time refers to the response speed of the liquid crystal display to the input signal, that is, the reaction time for the liquid crystal to turn from dark to bright, or from bright to dark. With the development of technology, the response time of LCDs has been gradually shortened from 20 milliseconds in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/34G02F1/133G02F1/13357G02F1/1335
Inventor 刘勇鑫蔡永生刘得志蔡淑慧
Owner AU OPTRONICS CORP
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