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Vertical oriented liquid crystal display device and its pixel unit circuit

A liquid crystal display device and vertical alignment technology, which is applied in transistors, static indicators, optics, etc., can solve problems such as uneven brightness and viewing angle problems of vertically aligned liquid crystal display devices, and achieve the goal of improving viewing angle problems and uneven brightness Effect

Active Publication Date: 2006-05-24
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The main purpose of the present invention is to provide a vertical alignment type liquid crystal display device and its pixel unit circuit, which can improve the viewing angle problem of the vertical alignment type liquid crystal display device; and can improve the problem of uneven brightness at different viewing angles

Method used

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  • Vertical oriented liquid crystal display device and its pixel unit circuit
  • Vertical oriented liquid crystal display device and its pixel unit circuit
  • Vertical oriented liquid crystal display device and its pixel unit circuit

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Embodiment Construction

[0051] image 3 It is a schematic circuit diagram of one of the pixel units 3 of the vertical alignment liquid crystal display device of the present invention. The pixel unit 3 also includes sub-pixel units 301, 302, and the pixel unit 3 includes a data line 31, a control line (Vg) 32, a common voltage line (Vcom) 33, a coupling signal line (Vcs2) 34, a thin film transistor 351, 352, liquid crystal capacitors 361, 362, auxiliary capacitors 371, 372.

[0052] The sources of the thin film transistors 351 and 352 are electrically connected to the data line 31, the gates of the thin film transistors 351 and 352 are electrically connected to the control line 32, and the drains of the thin film transistors 351 and 352 are respectively connected to the liquid crystal capacitors 361 and 362. One end of the auxiliary capacitor 371 and one end of the auxiliary capacitor 372 are electrically connected, the other end of the auxiliary capacitor 371 is electrically connected to the couplin...

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Abstract

In the invention, each pixel is divided into first sub pixel unit and second sub pixel unit. One end of auxiliary capacitance in first sub pixel unit is connected to coupling signal line for providing voltage of coupling electrode electrically. One end of auxiliary capacitance in second sub pixel unit is connected to the common voltage line for providing common voltage electrically. Thus, the pixel voltage of the first sub pixel unit is different from the pixel voltage of the second sub pixel unit by controlling voltage of the coupling electrode. The invention improves issue of visual angle of liquid crystal display as well as improves uneven brightness caused by different visual angle.

Description

technical field [0001] The invention relates to a liquid crystal display device, in particular to a vertical alignment type liquid crystal display device and a pixel unit circuit thereof. Background technique [0002] Currently, two common liquid crystal driving modes include a twisted nematic (TN) mode and a vertically-aligned (VA) mode. [0003] When using the TN mode to drive the liquid crystal, the liquid crystal of the liquid crystal display will not rotate without any electric field, so that the light source of the backlight module will pass through the liquid crystal and the polarizer, which will cause the display to appear completely white. Call it "Normally White". [0004] Although the technology related to the TN liquid crystal display has been significantly improved in recent years, the contrast and color saturation provided by the TN liquid crystal display are also superior to those of traditional displays (eg, CRT displays). However, the TN liquid crystal dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/136H01L29/786
Inventor 李锡烈
Owner AU OPTRONICS CORP
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