Common electrode driving unit, liquid crystal display panel and liquid crystal display device

A technology of liquid crystal display panels and common electrodes, applied in static indicators, instruments, etc., can solve problems such as complex processes and achieve the effect of eliminating flickering phenomena

Inactive Publication Date: 2013-03-06
BOE TECH GRP CO LTD
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a common electrode drive unit, a liquid crystal display panel and a liquid crystal display device. In the prior a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Common electrode driving unit, liquid crystal display panel and liquid crystal display device
  • Common electrode driving unit, liquid crystal display panel and liquid crystal display device
  • Common electrode driving unit, liquid crystal display panel and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, there is a storage capacitor C between the pixel electrode and the common electrode st , There is a parasitic capacitance C between the gate and drain of the thin film transistor (ThinFilm Transistor, TFT) gd ; There is a capacitance C between the source line and the pixel electrode sp , C all Is the composite capacitance at the pixel electrode, which is determined by the capacitance C st , C gd , C sp , C lc , And other capacitors that may exist in the figure 1 Medium, C all =C st +C gd +C sp +C lc .

[0023] During the opening and closing of the gate line, a high voltage Vgh (that is, the second driving voltage) is output to the pixel switch in the open state, and a low voltage Vgl (that is, the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The embodiment od of the invention provides a common electrode driving unit, a liquid crystal display panel and a liquid crystal display device, and the common electrode driving unit is used for providing driving voltage for a common electrode in the liquid crystal display panel. The liquid crystal display panel comprises a pixel electrode and a grid driving unit. The invention is characterized in that: the common electrode driving unit comprises an output unit which is connected between the grid driving unit and the common electrode; the output unit is used for correspondingly outputting a third driving voltage and a fourth driving voltage when the grid driving unit outputs a first driving voltage and a second riving voltage, wherein the second driving voltage is larger than the first driving voltage, and the third driving voltage is larger than the fourth driving voltage; and a first voltage difference and a second voltage difference mutually counteract, wherein the first voltage difference is voltage drop generated when the first driving voltage and the second driving voltage mutually convert on the pixel electrode, and the second voltage difference is the voltage drop generated when the third driving voltage and the fourth driving voltage mutually convert on the pixel electrode. By the invention, a flare phenomenon of a liquid crystal display is eliminated.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a common electrode drive unit, a liquid crystal display panel and a liquid crystal display device. Background technique [0002] In the liquid crystal display panel, there is a parasitic capacitance C between the gate and the drain of the thin film transistor gd , in such as figure 1 shown on the pixel electrode, the gate signal changes through the parasitic capacitance C gd The coupling effect of will produce a voltage difference ΔV on the pixel electrode p , so that the positive and negative display voltages with the same absolute value are no longer symmetrical with respect to the common electrode, resulting in different gray scales, and thus the liquid crystal display device will produce flickering phenomenon. [0003] In the prior art, the DC voltage output by the common electrode is adjusted so that the voltage drop on the common electrode is equal to the voltage diff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G09G3/36
Inventor 张玉婷永山和由
Owner BOE TECH GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap