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Gate driver and liquid crystal display applied by same

A gate driver and buffer technology, applied in the direction of static indicators, instruments, etc., can solve problems such as excessive differences in wiring resistance, excessive differences in scanning signals, and affecting the image quality of the display panel 101, so as to improve the quality , the effect of reducing the probability

Active Publication Date: 2010-09-01
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this way, based on the fact that each output channel OUT of the gate driver 103 has the same load on the display panel 101, due to the distance between each output channel OUT of the gate driver 103 and the display panel 101 The difference in wire resistance is too large (there may be a difference of hundreds of ohms), so it is likely to cause a large difference in the scan signal (scan signal) output by each output channel OUT of the gate driver 103.
[0005] Also because of this, when the type of the display panel 101 is normally black (normally black), when the gate driver 103 outputs scan signals with large differences to the display panel 101 through all its output channels OUT to turn on all the When scanning lines (that is, all pixels), the display panel 101 will not present an ideal all-black picture at this time, but may produce the so-called "multi-band phenomenon (multi-band phenomenon)" (that is, display The middle part of the area A of the panel 101 will present a black picture, and the areas B and C of the display panel 101 will present a continuous gray picture), which will eventually affect the quality of the image picture presented by the display panel 101

Method used

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  • Gate driver and liquid crystal display applied by same
  • Gate driver and liquid crystal display applied by same
  • Gate driver and liquid crystal display applied by same

Examples

Experimental program
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no. 1 example

[0050] figure 2 It is a schematic diagram of a liquid crystal display 200 according to the first embodiment of the present invention. Please refer to figure 2 , the liquid crystal display 200 includes a display panel (display panel) 201 , a gate driver (gate driver) 203 , a source driver (source driver) 205 , a timing controller (timing controller, T-con) 207 and a backlight module (backlight module) 209 . In the first embodiment, the backlight module 209 is used to provide the light source required by the display panel 201; and the timing controller 207 is used to control the operation of the gate driver 203 and the source driver 205, so that the gate driver 203 and the The source driver 205 respectively generates a scan signal and a data signal to drive the display panel 201 , so that the display panel 201 displays image frames.

[0051] Here, based on the content described in the prior art, it can be known that the distance between each output channel of the traditional...

no. 2 example

[0088] Figure 6 It is a schematic diagram of a liquid crystal display 600 according to the second embodiment of the present invention. Figure 7 It is a schematic diagram of the gate driver 603 according to the second embodiment of the present invention. Please merge reference figure 2 , image 3 , Figure 6 and Figure 7 The difference between the liquid crystal displays 200 and 600 is that the structures of the compensation units 303 and 703 in the gate drivers 203 and 603 are different, but the gate driver 603 also has similar / similar technical functions as the gate drivers and 203 .

[0089] In the second embodiment, the compensation unit 703 includes two sub-compensation units (sub-compensation units) SCU1 and SCU2. Wherein, the sub-compensation unit SCU1 is coupled to a part of the output channel of the scanning signal generating unit 301, for example, the output channel OUT 1 ~OUT 450 and the sub-compensation unit SCU2 is coupled to the remaining output channel...

no. 3 example

[0106] Figure 10 It is a schematic diagram of a liquid crystal display 1000 according to a third embodiment of the present invention. Figure 11 It is a schematic diagram of the gate driver 1003 according to the third embodiment of the present invention. Please merge reference Figure 6 , Figure 7 , Figure 10 and Figure 11 The difference between LCD 600 and LCD 1000 is that the structures of the compensation units 703 and 1103 in the gate drivers 603 and 1003 are different, but the gate driver 1003 also has similar / similar technical functions as the gate driver 603.

[0107] To be more clear, Figure 12 and Figure 13 They are respectively schematic diagrams of the sub-compensation units SCU1 and SCU2 according to the third embodiment of the present invention. Please merge reference Figure 12 and Figure 13 , the sub-compensation unit SCU1 includes line resistance LR1 and LR2, and multiple output channels OUT 1 ~OUT 450 Equivalent compensation circuit CC 1 ~CC...

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Abstract

The invention discloses a gate driver and a liquid crystal display applied by the same. The gate driver comprises a scanning signal generation unit and a compensation unit, wherein the scanning signal generation unit is provided with a plurality of output channels and is used for sequentially outputting scanning signals through the plurality of output channels according to a basic clock and an initial pulse; and the compensation unit is coupled with the plurality of output channels and is used for compensating the total resistance of each output channel and sequentially receiving and transducing the scanning signals to a display panel.

Description

technical field [0001] The present invention relates to a plane display technology, and in particular to a grid driver with a resistance compensation function and a liquid crystal display applied thereto. Background technique [0002] In recent years, with the vigorous development of semiconductor technology, portable electronic products and flat panel display products are also emerging. Among the types of flat panel displays, liquid crystal displays (LCDs) have become the mainstream of display products due to their advantages of low voltage operation, no radiation scattering, light weight and small size. [0003] Generally speaking, if figure 1 As shown, when the current gate driver (gate driver) 103 is applied to the display panel 101 with high resolution (high resolution), due to the distance between each output channel (output channel) OUT of the gate driver 103 and the display panel 101 (Generally, the distance between the wiring and the area A of the display panel 10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36
Inventor 李璟林蔡育均徐兆庆苏诗媛
Owner AU OPTRONICS CORP