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Electrode arranging structure for transverse electric field wide-viewing angle liquid crystal display

A technology of liquid crystal display and electrode arrangement, which is applied in instruments, nonlinear optics, optics, etc., and can solve the problems of small aperture ratio of IPS-LCD, inability to rotate, and reduction of aperture ratio of IPS-LCD

Inactive Publication Date: 2005-06-22
HANNSTAR DISPLAY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the liquid crystal molecules 22 located at the tip of the ㄑ shape (that is, the boundary between the two blocks) will be squeezed by the liquid crystal molecules 22 with different rotation directions on both sides, resulting in a situation where they cannot rotate.
Therefore, after the voltage is applied, since the common electrode 20 and the pixel electrode 18 themselves are not transparent, and the liquid crystal molecules 22 located at the boundary of the two blocks cannot rotate, the dotted line I-I, II- II will be displayed as a dark line, which reduces the aperture ratio of IPS-LCD
Especially when the fishbone 20b, 20c of the common electrode 20 or the comb teeth 18b, 18c of the pixel electrode 18 are designed in a zigzag shape, the tip of the ㄑ shape will increase, and the aperture ratio of the IPS-LCD will become smaller

Method used

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  • Electrode arranging structure for transverse electric field wide-viewing angle liquid crystal display
  • Electrode arranging structure for transverse electric field wide-viewing angle liquid crystal display
  • Electrode arranging structure for transverse electric field wide-viewing angle liquid crystal display

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Effect test

no. 1 example

[0033] See Figure 3A versus Figure 3B , Which shows the top view of the electrode arrangement structure of the IPS-LCD of the first embodiment of the present invention. In the electrode arrangement structure of the IPS-LCD of the present invention, each pixel area 26 is provided with a comb-shaped common electrode 28 and a comb-shaped pixel electrode 30. The comb-shaped common electrode 28 is composed of a horizontal bar 28a and three comb teeth 28b. , 28c, 28d, and the comb-shaped pixel electrode 30 is composed of a horizontal bar 30a and two comb teeth 30b, 30c, and the two comb teeth 30b, 30c of the pixel electrode 30 are interlacedly inserted into the common electrode 28 Between the three comb teeth 28b, 28c, and 28d, one pixel area 26 is divided into four sub-pixel areas 261, 262, 263, and 264. The feature of the present invention is that the comb teeth 30b and 30c of the pixel electrode 30 are connected by a plurality of regular trapezoids, so the contours on both sides of ...

no. 2 example

[0044] See Figure 5A versus Figure 5B , Which shows the top view of the electrode arrangement structure of the IPS-LCD of the second embodiment of the present invention. In the electrode arrangement structure of the IPS-LCD of the present invention, each pixel area 26 is provided with a comb-shaped common electrode 28 and a comb-shaped pixel electrode 30. The comb-shaped common electrode 28 is composed of a horizontal bar 28a and three comb teeth. 28b, 28c, 28d, and the comb-shaped pixel electrode 30 is composed of a horizontal bar 30a and two comb teeth 30b, 30c, and the two comb teeth 30b, 30c of the pixel electrode 30 are interlaced and inserted in the common electrode Between the three comb teeth 28b, 28c, and 28d of 28, one pixel area 26 is divided into four sub-pixel areas 261, 262, 263, and 264. The feature of the present invention is that the comb teeth 30b and 30c of the pixel electrode 30 are connected by a plurality of inverted trapezoids, each of which has a short ba...

no. 3 example

[0047] See Figure 6A versus Figure 6B , Which shows the top view of the electrode arrangement structure of the IPS-LCD of the third embodiment of the present invention. The third embodiment of the present invention is to improve the electrode arrangement structure shown in FIG. 3 by swapping the strip profile of the common electrode 28 and the continuous ∠ profile of the pixel electrode 30. Therefore, the two comb teeth 30b, 30c of the pixel electrode 30 are elongated, and the three comb teeth 28b, 28c, 28d of the common electrode 28 are connected by a plurality of regular trapezoids, so that the contours on both sides are continuous ∠ Type, the short base length of each trapezoid is D 1 With long bottom length D 2 The relationship between is D 2 ≤D 1 +50μm. In addition, according to this design principle, comb teeth 28b, 28c, 28d can be formed by connecting multiple regular trapezoids (such as Figure 6A As shown), the comb teeth 28b, 28c, 28d can also be formed by connecting m...

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Abstract

An electrode arrangement structure in a pixel region of a lateral electric field liquid crystal display (In-Plane Switching mode LCD, referred to as IPS-LCD), including a comb-shaped common electrode, including a horizontal bar (bar) and A plurality of comb-teeth, wherein each comb-teeth extends from the horizontal bar along the first longitudinal direction; a comb-shaped pixel electrode includes a horizontal bar and a plurality of comb-teeth, wherein each comb-teeth extends from the horizontal bar The bars extend along the second longitudinal direction, and the plurality of comb teeth of the pixel electrode are interposed between the plurality of comb teeth of the common electrode. Wherein, the comb teeth of the common electrode can be made into a rectangular profile or a continuous ∠-shaped side wall profile, and the comb teeth of the pixel electrode can be made into a rectangular bar profile or a continuous ∠-shaped side wall profile.

Description

Technical field [0001] The invention relates to a lateral electric field wide viewing angle liquid crystal display (In-Plane Switching mode LCD, referred to as IPS-LCD), in particular to an electrode arrangement structure of a lateral electric field wide viewing angle liquid crystal display. Background technique [0002] Wide viewing angle lateral electric field liquid crystal display (IPS-LCD) is one of the mainstream wide viewing angle LCD technologies. The difference from general twisted nematic LCD is that the common electrode and pixel of IPS-LCD The pixel electrode is made on the same side of the glass substrate (TFT substrate). It uses a horizontal electric field to drive the common electrode and the pixel electrode, which can make the liquid crystal molecules rotate on the plane and greatly increase the viewing angle, so it has a wide viewing angle and high light efficiency. , High contrast and other advantages. [0003] However, such as figure 1 As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1343
Inventor 杨界雄
Owner HANNSTAR DISPLAY CORPORATION
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