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LCD display device and its display panel

A display panel and display technology, applied to static indicators, instruments, etc., can solve problems such as insufficient or overcompensation, increased design and measurement uncertainty, increased complexity of gate driver design, etc., to improve accuracy , Eliminate the need to manually correct the common voltage procedures, and improve the effect of frame quality

Inactive Publication Date: 2008-06-04
CHUNGHWA PICTURE TUBES LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, when a designer wants to design a driving technique for solving the multi-level (for example, 3-level or 4-level) scanning voltage of the related art 2, it is conceivable that the design complexity of the gate driver will increase will increase, and when the gate driver cannot accurately generate the above-mentioned boosted voltage potential Vp, the feed-through voltage ΔV of the scan voltage VG of the scan line Gm D Will be undercompensated or overcompensated, which increases the uncertainty of design and measurement
In addition, the above-mentioned solution to related technology 2 also needs to cooperate with the fine-tuning of the external gamma correction voltage of the source driver to compensate the liquid crystal capacitance C due to different gray scale cross voltages. LC value changes, the feedthrough voltage (ΔV D ) drift

Method used

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  • LCD display device and its display panel
  • LCD display device and its display panel
  • LCD display device and its display panel

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Embodiment Construction

[0050] Figure 5 It is a block diagram of a display 500 according to a preferred embodiment of the present invention. Please refer to Figure 5 A display 500 (such as a liquid crystal display) includes a display panel (such as a liquid crystal display panel) 501 , a gate driver 503 , and a source driver 505 . In this embodiment, the display panel 501 includes a first pixel area 507 , a second pixel area 509 , and a common voltage generation circuit 511 . Wherein, the first pixel area 507 has a plurality of first pixels (not shown), arranged in an i*j array (i, j are positive integers) for displaying images. The second pixel area 509 has a plurality of second pixels 509 a disposed on the periphery of the first pixel area 507 .

[0051] The common voltage generation circuit 511 is electrically connected to a second pixel 509 a in the second pixel area 509 , and the second pixel 509 a must correspond to a column of pixels in the first pixel area 507 . In addition, the common ...

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Abstract

The present invention discloses a liquid crystal display and a display panel thereof. The display panel is provided with a common voltage generating circuit added to at least one pixel in an inactive pixel region; the average of positive polarity voltage and negative polarity voltage is acquired in two-frame time according to the display voltage of a drain electrode end of a thin film transistor inside the pixel, so as to be taken as common voltage and sent to every pixel in an active pixel region inside the display panel. Therefore, the present invention can obviously improve the feedthrough voltage (delta VD) shift of scanning voltage which is caused by the RC delay of parasitic capacitance and parasitic resistance on scan lines, then promotes the gray-scale accuracy of every pixel of the active pixel region inside the display panel, and decreases the flicker noise of the display panel, so as to greatly promote the frame quality shown by the liquid crystal display.

Description

technical field [0001] The present invention relates to a display and its display panel, and in particular to a liquid crystal display capable of automatically adjusting a common voltage and its display panel. Background technique [0002] A liquid crystal display (Liquid Crystal Display, LCD) has been widely used recently, and replaces a cathode ray tube display (Cathode Ray Tube, CRT) to become one of mainstream displays of the next generation. With the improvement of semiconductor technology, the liquid crystal display has the advantages of low power consumption, thin and light weight, high resolution, high color saturation, long life, etc., so it is widely used in computer LCD screens and LCD TVs (LCDTV) and other electronic products closely related to life. [0003] figure 1 It is a diagram of a pixel structure 100 of an existing thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD). Please refer to figure 1 , the pixel s...

Claims

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Application Information

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IPC IPC(8): G02F1/133G09G3/36
Inventor 杜长庆
Owner CHUNGHWA PICTURE TUBES LTD
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