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Liquid crystal display panel and method for correcting poor burning of liquid crystal display panel

A technology for display panels and liquid crystal display devices, applied in static indicators, instruments, etc., can solve the problems of abnormal display and pixel voltage deviation from settings, and achieve the effect of solving the burning problem and improving the burning defects.

Inactive Publication Date: 2020-07-24
NANJING CEC PANDA LCD TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bias voltage Vdc is formed between the positive charge and the negative charge, causing the pixel voltage to deviate from the setting, and the display is abnormal

Method used

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  • Liquid crystal display panel and method for correcting poor burning of liquid crystal display panel
  • Liquid crystal display panel and method for correcting poor burning of liquid crystal display panel
  • Liquid crystal display panel and method for correcting poor burning of liquid crystal display panel

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Embodiment Construction

[0023] Such as Figure 4 As shown, the liquid crystal display device includes a display panel 10 , a source driver 20 connected to the display panel, and a timing driver 30 connected to the source driver 20 , and the display panel 10 is equally divided into multiple regions.

[0024] The liquid crystal display device also includes a detection circuit arranged in the timing driver 30 or outside the timing driver 30. The detection circuit includes a test circuit 31 and a plurality of switch TFTs connected to the test circuit 31, wherein the number of switch TFTs is the same as the number of regions. Each switch TFT corresponds to a region, and the common voltage Vcom of the corresponding region is tested by each switch TFT; the test circuit 31 is used to detect whether the display panel 10 is a still picture or a non-still picture.

[0025] In this embodiment, the common voltages of five positions of the display panel 10 are selected, specifically the central position and four s...

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Abstract

The invention provides a liquid crystal display panel and a method for correcting the poor burning of the liquid crystal display panel. The liquid crystal display panel comprises a display panel, a source driver, a time sequence driver connected with the source driver and a detection circuit connected with the time sequence driver, wherein the detection circuit comprises a test circuit and a plurality of switching TFTs connected with the test circuit; wherein the display panel is divided into a plurality of areas, each area corresponds to one switching TFT, and the common voltage of the corresponding area is measured through the switching TFT; the test circuit is used for detecting whether the display panel is a static picture or a non-static picture. The display panel is divided into a plurality of areas, the common voltage of each area is measured, and when a display image is a non-static image, only the common voltage Vcom C at the center position is output; and when the display picture is a static picture, the common voltage of each region is alternately output according to a certain frequency, so that the phenomenon of poor burn-in caused by pixel voltage residue is improved,and the problem of panel burn-in is solved.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display panels, and in particular relates to a liquid crystal display panel and a correction method for poor burning thereof. [0002] technical background [0003] Such as figure 1 As shown, when the liquid crystal display device performs screen switching, if the display time of the previous screen is very long, the screen before switching will not disappear immediately after the switching is completed, so the screen before switching can be seen shallowly on the screen after switching. This phenomenon is called poor burn-in, which is caused by keeping a still picture on the screen for a long time. The liquid crystal is polarized due to being driven for a long time, so that the liquid crystal molecules cannot be normally deflected under the control of the signal voltage. Even if the display is changed, traces of the previous image can still be seen on the screen. Bad burning is divided in...

Claims

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Application Information

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IPC IPC(8): G09G3/00G09G3/36
CPCG09G3/006G09G3/3611G09G3/3696
Inventor 闫金波
Owner NANJING CEC PANDA LCD TECH
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