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Liquid crystal display device and driving method thereof

A technology of liquid crystal display device and liquid crystal display panel, which is applied to static indicators, instruments, etc., can solve the problems of audible noise and achieve the effect of noise improvement

Active Publication Date: 2012-03-14
INNOCOM TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the liquid crystal display device produces audible noise in the prior art, it is necessary to provide a liquid crystal display device that can improve the audible noise

Method used

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  • Liquid crystal display device and driving method thereof
  • Liquid crystal display device and driving method thereof

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Embodiment Construction

[0040]In order to improve the phenomenon of the audible noise generated by the liquid crystal display device, the present invention first researches and analyzes the cause of the audible noise. Specifically, we found that one of the sources of audible noise is caused by the vibration of the printed circuit board of the liquid crystal display device when it is in operation. In order to suppress the noise generated by the vibration of the printed circuit board, sound-absorbing cotton can be provided to cover the printed circuit board. However, the sound-absorbing cotton is a flammable substance. This improvement scheme makes the liquid crystal display device have an unsafe factor with a high risk of burning.

[0041] Further in-depth analysis of the source of the noise, we found that: the noise (audible noise) that falls into the range of human hearing is mainly generated when the liquid crystal display device displays some specific pictures, and when the liquid crystal display d...

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Abstract

The invention relates to a liquid crystal display device and a driving method thereof. The liquid crystal display device comprises a time sequence control circuit, a scanning driving circuit, a data driving circuit and a liquid crystal display panel, and the liquid crystal display panel comprises multiple pixels. The time sequence control circuit comprises a data analysis module, wherein the data analysis module is used for receiving and analyzing every frame of image data; in n lines of the pixels which are displayed continuously in one frame of the image data, when m lines of pixels which are displayed continuously display a black picture (n>=4, n>m>=2), the data analysis module outputs a first polarity inversion control signal to the data driving circuit, the data driving circuit is used for processing a data signal according to the first polarity inversion control signal so as to generate a plurality of gray scale voltages and the gray scale voltages are provided to the liquid crystal display panel; and when the plurality of pixels of the liquid crystal display panel display the frame of image, in the m lines of the pixels, which are displayed continuously and display the black picture, the polarities of all the pixels positioned in the same line are the same.

Description

technical field [0001] The invention relates to a liquid crystal display device and a driving method thereof. Background technique [0002] Liquid crystal display devices have been widely used in electronic equipment such as televisions, notebook computers, mobile phones, and personal digital assistants due to their small size, light weight, thin thickness, low power consumption, no flickering, and low radiation. [0003] A liquid crystal display device generally includes a liquid crystal display panel and a backlight module for providing planar light to the liquid crystal display panel. The liquid crystal display panel generally includes a common electrode, a pixel electrode, and a plurality of liquid crystal molecules that are driven and twisted by the common electrode and the pixel electrode. When the voltage applied between the common electrode and the pixel electrode changes, the twist angle of the liquid crystal molecules is different, so that the light transmission r...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 黄顺明
Owner INNOCOM TECH SHENZHEN
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