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Liquid crystal display device and method for adjusting common voltage

A liquid crystal display device and shared voltage technology, applied in static indicators, electrical digital data processing, input/output process of data processing, etc., can solve problems such as screen abnormalities, and achieve the effect of solving screen abnormalities

Active Publication Date: 2022-01-04
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a liquid crystal display device and a method for adjusting the common voltage to solve the problem of abnormal screen

Method used

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  • Liquid crystal display device and method for adjusting common voltage
  • Liquid crystal display device and method for adjusting common voltage
  • Liquid crystal display device and method for adjusting common voltage

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Embodiment Construction

[0034] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] combine figure 2 and image 3 as shown, figure 2 is a schematic block diagram of a liquid crystal display device 20 provided by an embodiment of the present invention, image 3 It is a schematic diagram of the driving circuit of the display panel 22 provided by the embodiment of the present invention. The liquid crystal display device 20 includes a driver integrated circuit 21 and a display panel 22, wherein the driver integrated circuit 21 includes a source voltage driver 211, a common voltage driver 212, a detection module 213, a judgment module 214, a common voltage calculation module 215,...

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Abstract

The invention provides a liquid crystal display device and a method for adjusting the common voltage. After judging that the common voltage needs to be adjusted, the optimum common voltage, so that the absolute value of the difference between the source voltage in positive polarity and the best common voltage is equal to the absolute value of the difference between the source voltage in negative polarity and the best common voltage, and according to the best common The voltage controls the output of the common voltage, thereby solving the problem of abnormal screen. Further, the adjustment of the common voltage can be performed in the idle time of each frame, so as to adjust the optimal common voltage all the time during the display process of the display panel.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display device and a method for adjusting a common voltage. Background technique [0002] In a liquid crystal display device, if the liquid crystal molecules work in the electric field of the same polarity for a long time, the liquid crystal molecules are prone to polarization and cause permanent damage, which will cause abnormalities in the screen of the liquid crystal display device. The voltage polarity must be reversed at regular intervals. [0003] Please refer to figure 1 , figure 1 is the source voltage V applied across the liquid crystal molecules S with common voltage V C schematic diagram. In order to ensure the display effect, the source voltage V S When the polarity is positive (the source voltage V S greater than the common voltage V C ) source voltage V S and common voltage V C The voltage difference ΔV + required with source voltage V ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/1333G06F3/041
CPCG09G3/3614G09G3/3696G02F1/13338G06F3/0412
Inventor 朱威武张婷婷王腾
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD