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Drive deivce for TFT LCD

A technology of thin-film transistors and liquid crystal displays, applied in instruments, nonlinear optics, optics, etc., to achieve the effect of reducing smearing

Active Publication Date: 2009-07-29
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a driving device for a thin film transistor liquid crystal display against the defects of the existing driving device for a thin film transistor liquid crystal display, which can effectively reduce the blurring of moving images caused by the visual residue of moving pictures

Method used

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  • Drive deivce for TFT LCD
  • Drive deivce for TFT LCD
  • Drive deivce for TFT LCD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is the driving equivalent diagram of Embodiment 1 of the driving device of the thin film transistor liquid crystal display of the present invention, as figure 1 As shown, the driving device of the thin film transistor liquid crystal display includes an external common electrode line number line 3 for providing a constant voltage; several pixel common electrode signal lines 4 for maintaining a constant voltage; several gate signal lines 1 for For providing gate signals; several data signal lines 2 are arranged crosswise with several gate signal lines for providing data signals; several pixel electrodes 5, each pixel electrode 5 is located on an adjacent gate signal line Between 1 and the adjacent data signal line 2, it is connected to the drain of the thin film transistor, and the pixel electrode 5 overlaps with the pixel common electrode signal line 4 to form a storage capacitor; several first thin film transistors 11, each first thin film The gate and so...

Embodiment 2

[0033] figure 2 It is the driving equivalent diagram of Embodiment 2 of the driving device of the thin film transistor liquid crystal display of the present invention, as figure 2 As shown, different from Embodiment 1, further, the driving device of the thin film transistor liquid crystal display of the present invention further includes: several third thin film transistors 13, the gate of each third thin film transistor 13 and the gate signal line 1 The two terminals are connected, the source is connected to the external common electrode signal line 3 , and the drain is connected to the second end of the pixel common electrode signal line 4 .

[0034] Take the n-1, n, and n+1 lines as an example for illustration. When the n-th line is turned on, that is, when the gate signal line 1 applies a high-voltage signal (Vgh), the pixel electrode 5 of the n-th line is introduced into the data signal line 2 for transmission. Since the other rows are under the control of the low volt...

Embodiment 3

[0037] image 3 It is the driving equivalent diagram of Embodiment 3 of the driving device of the thin film transistor liquid crystal display of the present invention, such as image 3 As shown, different from Embodiment 1, further, the driving device of the thin film transistor liquid crystal display of the present invention also includes: several fourth thin film transistors 14, and the gate and source of each fourth thin film transistor 14 are connected with those of the previous row. The gate signal line 1 is connected to the second end, and the drain is connected to the second end of the pixel common electrode signal line 4 .

[0038] Take the n-1, n, and n+1 lines as an example for illustration. When the n-th line is turned on, that is, when the gate signal line 1 applies a high-voltage signal (Vgh), the pixel electrode 5 of the n-th line is introduced into the data signal line 2 for transmission. Since the other rows are controlled by the low voltage signal (Vgl), the ...

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PUM

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Abstract

The invention relates to a driving device of a film transistor liquid crystal display. A grid signal wire and a common electrode signal wire are connected by a triode formed by TFT; i.e., during the scanning and driving process of one frame of signals, a high-voltage signal is inserted before the next line is opened, equivalently, the black frame is inserted under a normal-white mode; when one line of the pixels are in use, the next line forcibly inserts the black frame data on the next line by the triode formed by the previous line of TFT; the driving device of the film transistor liquid crystal display firstly applies the high voltage forcibly before the next line of the TFT LCD pixels are opened, so as to achieve the object of inserting the black frame, thus effectively reducing the tailing phenomenon of the moving images.

Description

technical field [0001] The invention relates to a driving device of a thin film transistor liquid crystal display, in particular to a driving device of a thin film transistor liquid crystal display in which a triode connection is formed between a gate signal line and a common electrode signal line through a TFT. Background technique [0002] The current driving device of Thin Film transistor liquid crystal display (TFT LCD) is usually designed in normally white mode, that is, a black screen is generated when a voltage is applied to the pixel electrode, and the light is kept transmitted when no voltage is applied. design. Figure 8 is the equivalent diagram of the prior art TFT LCD driver, such as Figure 8 As shown, when the gate of a single unit pixel is turned on, the data signal is transmitted to the pixel electrode through the thin film transistor (Thin Film Transistor, referred to as TFT) channel, and then the pixel voltage controls the deflection of the liquid crystal m...

Claims

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Application Information

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IPC IPC(8): G02F1/1362
Inventor 高文宝殷新社肖向春
Owner BOE TECH GRP CO LTD
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