Edge electrical field switching type liquid crystal display and manufacture method thereof

A technology of fringe electric field switching and liquid crystal display, applied in instruments, nonlinear optics, optics, etc., can solve problems such as image retention and imbalance, and achieve the effect of reducing the number and improving image retention

Active Publication Date: 2009-10-14
HANNSTAR DISPLAY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the thick dielectric layer, the driving voltage between the even (positive) field and the odd (negative) field will become unbalanced, further causing the problem of image sticking (Image Sticking)

Method used

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  • Edge electrical field switching type liquid crystal display and manufacture method thereof
  • Edge electrical field switching type liquid crystal display and manufacture method thereof
  • Edge electrical field switching type liquid crystal display and manufacture method thereof

Examples

Experimental program
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Effect test

no. 1 example

[0049] see Figure 2A , which is a schematic plan view of a certain pixel area in the first embodiment provided by the present invention. Each pixel area is formed by interlacing several gate lines 22 and several data lines 272 to surround each other, and includes: a common electrode 26, a pixel electrode 210 with several openings, a common line 271 parallel to the data line 272 and a contact hole 29 .

[0050] see Figure 2B ,for Figure 2A A schematic cross-sectional view along line A-A. The first embodiment provided by the present invention and its manufacturing method are described as follows. Firstly, a substrate 21 is provided, and a first metal layer is formed thereon. Next, the first metal layer is etched to form several gate lines 22 , and then a gate insulating layer 23 is coated to cover the gate lines 22 and part of the substrate 21 . Then, the channel portion 24 , the doped portion 25 and the common electrode 26 are sequentially formed on the gate insulating...

no. 2 example

[0053] Figure 3A to Figure 3E It is a fringe field switching liquid crystal display according to the second embodiment of the present invention, which utilizes the half-tone technology process (Half-Tone Technology Process) to simultaneously define the process schematic diagram of the common electrode and the data line. in, Figure 3A to Figure 3E The right half of Figure 2A A schematic sectional view along line A-A, and its left half is Figure 2A A schematic sectional view along line B-B.

[0054] first as Figure 3A As shown, a semiconductor layer and a doped layer are formed on the gate insulating layer 23 and the substrate 21 in sequence. Next, the semiconductor layer and the doped layer are etched to form the channel portion 24 and the doped portion 253 above a gate line 22 . Furthermore, a first transparent conductive layer 261 is formed on the doped portion 253 and the gate insulating layer 23 , and a second metal layer 2711 is formed thereon. Wherein, the firs...

no. 3 example

[0060] see Figure 4A , which is a schematic plan view of a certain pixel area in the third embodiment provided by the present invention. Each pixel area is formed by interlacing several gate lines 42 and several data lines 462 to surround each other, and includes: a common electrode 47, a pixel electrode 410 with several openings, a gate parallel to the data lines 462 The common line 461 and a contact hole 49 .

[0061] see Figure 4B ,for Figure 4A A schematic cross-sectional view along line A-A. Now the third embodiment provided by the present invention and its manufacturing method are described as follows. Firstly, a substrate 41 is provided, and a first metal layer is formed thereon. Secondly, the first metal layer is etched to form several gate lines 42 , and then a gate insulating layer 43 is coated to cover the gate lines 42 and part of the substrate 41 . Then, the channel portion 44 and the doped portion 45 are sequentially formed on the gate insulating layer 4...

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PUM

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Abstract

A fringe electric field switching liquid crystal display and its manufacturing method, the method comprising: forming a first metal layer on a substrate, etching the first metal layer to form several gate lines, forming a common electrode and a second metal Layer on the substrate, etch the second metal layer to form a first electrode, a second electrode, a common line and several data lines, and form a pixel electrode overlapping with the common electrode; the gate line and the data line At least one closed area is formed to accommodate the common electrode and the pixel electrode, the first electrode is connected to the pixel electrode, and the second electrode is connected to the data line, and the common electrode is directly connected to the common line. The present invention can overcome the problem of image sticking in the prior art. In addition, the method of the present invention is based on the current liquid crystal display manufacturing method, and changes part of the manufacturing process. It has high feasibility and industrial applicability .

Description

【Technical field】 [0001] The present invention relates to a transverse electric field (In-Plane Switching; IPS) liquid crystal display, in particular to a fringe field switching (Fringed Field Switching; FFS) liquid crystal display and a manufacturing method thereof. 【Background technique】 [0002] In the current display industry, liquid crystal displays (Liquid Crystal Displays; LCDs) have gradually replaced cathode ray tubes (Cathode Ray Tubes) due to their advantages of being completely flat, light in weight, energy saving, and low electromagnetic radiation. , and become the mainstream in the display. [0003] However, since the long axis and the short axis of the liquid crystal molecules have different refractive indices. Therefore, when watching the LCD screen from different angles, the picture you see will be different with different viewing angles. When the viewing angle continues to increase, there will be a decrease in contrast, color changes, and even grayscale i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1333
Inventor 施博盛
Owner HANNSTAR DISPLAY CORPORATION
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