JP4097963B2 - IPS-LCD electrode array structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-plane switching LCD (In-Plane Switching, IPS-LCD), and more particularly to an electrode array structure of an IPS-LCD and a method for forming the same.
[0002]
[Prior art]
Liquid crystal displays are classified according to the direction of liquid crystal molecules. In a known twisted nematic LCD (TN-LCD), liquid crystal molecules are twisted between two substrates. In contrast, in the IPS-LCD, the common electrode and the pixel electrode are formed on a lower glass substrate (TFT substrate), a horizontal electric field is formed, and liquid crystal molecules are rearranged between the horizontal electric fields. Therefore, IPS-LCDs are used to improve viewing angle, contrast ratio and color shift.
[0003]
In IPS-LCD, the display feature of the viewing angle of luminance reversal is excellent. However, as shown in FIG. 1, when the liquid crystal molecules 1 are rotated by 45 ° in a horizontal electric field, the image seen from the 45 ° or 135 ° direction with respect to the vertical direction of the common electrode 2 and the pixel electrode 3 is blue or Color yellow. This is a problem to be solved with the image quality of IPS-LCD.
[0004]
In order to solve the color misregistration, in the prior art, a herringbone-shaped electrode structure is developed to adjust the rotation angle of the liquid crystal molecules. As shown in FIG. 2, in the known IPS-LCD, the TFT substrate 10 includes a plurality of parallel data lines 12 extending in the Y-axis direction and a plurality of parallel gate lines 14 extending in the X-axis direction. And arranged to form a matrix of pixel areas 24. In addition, a comb pixel electrode 18 and a herringbone common electrode 20 are disposed in each pixel area 24, and at least one TFT device 16 is disposed at the intersection of the data line 12 and the gate line 14. Furthermore, an orientation layer (not shown) extends over the entire surface of the TFT substrate 10, the orientation layer is rubbed in the direction of arrow A, and the liquid crystal molecules 22 are applied before an external voltage is applied to the TFT substrate 10. Arrange in the direction of arrow A.
[0005]
The comb pixel electrode 18 is disposed on the gate line 14 and includes a bar 18a forming a capacitor and a plurality of continuous saw teeth 18b and 18c extending from the bar 18a in the Y-axis direction. The herringbone-type common electrode 20 includes a central wiring portion 20a extending in the X-axis direction, and a plurality of bones 20b and 20c bent at the central wiring portion 20a and extending in the first Y-axis direction and the second Y-axis direction. Prepare. For example, the bone 20b extended in the first Y-axis direction is connected in parallel to the tooth 18b, and the bone 20b is arranged between the teeth 18b and 18c.
[0006]
When an external voltage is applied to the TFT substrate 10, a lateral electric field is formed between the bones 20a, 20b and the teeth 18b, 18c, causing the liquid crystal molecules 22 to rotate toward the lateral electric field. The central wiring part 20a of the common electrode 20 is identified, the pixel area 24 is divided into a first sub-pixel area 241 and a second sub-pixel area 242, and the liquid crystal molecules 22a and 22b adjacent to the central wiring part 20a are respectively Rotates counterclockwise and clockwise. In the first sub-pixel area 241, the bones 20b, 20c and the teeth 18b, 18c have the same sawtooth side wall, and the liquid crystal molecules 22a and 22a ′ adjacent to the stake tip of the saw tooth side wall also rotate counterclockwise and clockwise, respectively. To do. As a result, two domains are formed in the first sub-pixel area 241. Similarly, the liquid crystal molecules 22b and 22b ′ also rotate counterclockwise and clockwise, respectively, and two domains are formed in the second sub-pixel area 242. Further, the sawtooth side wall causes a specific inclination of the transverse electric field corresponding to the rotation angle of the main axis of the liquid crystal molecules 22. Preferably, the rotation angle θ of the liquid crystal molecules 22 satisfies 0 ° <θ ≦ + 60 ° or −60 ≦ θ <0 ° to avoid a coloring phenomenon.
[0007]
However, the liquid crystal molecules 22 located at the pointed portion of the sawtooth side wall, that is, the two domains of the separated sub-pixel area are pushed by the molecules 22 rotating in different directions, and the liquid crystal molecules 22 located on the two separated domains. Stops rotating. After the power supply is provided to the TFT substrate 10, the common electrode 20 and the pixel electrode 18 are non-translucent, the liquid crystal molecules 22 cannot rotate, and the dotted lines II and II-II located at the pointed portion of the sawtooth side wall. Represents a dark line. As a result, the aperture ratio of the IPS-LCD decreases. In particular, when the number of liquid crystal molecules 22 located at the pointed portion of the sawtooth side wall increases, the number of dark lines increases correspondingly, thereby further reducing the aperture ratio. Therefore, there is a need for an IPS-LCD electrode array structure that solves the above problems.
[0008]
[Problems to be solved by the invention]
The present invention provides an electrode array structure and a method for forming the same, and improves the rotation angle of the liquid crystal molecules, thereby eliminating the coloring phenomenon and increasing the aperture ratio of the IPS-LCD.
[0009]
An object of the present invention is to improve the rotation angle of liquid crystal molecules by providing a rectangular sidewall of an electrode.
Another object of the present invention is to make the rotation angle θ of the liquid crystal molecules satisfy 0 ° <θ ≦ + 60 ° or −60 ≦ θ <0 °.
[0010]
Another object of the present invention is to solve the coloring phenomenon.
An object of the present invention is to increase the aperture ratio of an IPS-LCD.
[0011]
[Means for Solving the Problems]
In the IPS-LCD pixel area, the electrode array structure is composed of a plurality of teeth of a comb-shaped common electrode extending in the first longitudinal direction and a plurality of teeth of a comb-shaped pixel area extending in the second longitudinal direction. Each tooth of the electrode is placed between adjacent teeth of the common electrode.
[0012]
In the first embodiment, the plurality of teeth of the common electrode are rectangular, and the plurality of teeth of the pixel electrode include continuous L-shaped side walls formed by trapezoidal or inverted trapezoidal vertical links.
In the second embodiment, the plurality of teeth of the pixel electrode are rectangular, and the plurality of teeth of the common electrode include continuous L-shaped side walls formed by trapezoidal or inverted trapezoidal vertical links.
[0013]
In a third embodiment, the plurality of teeth of the pixel electrode is formed by the trapezoidal vertical links, the plurality of teeth of the common-electrode are formed by inverted trapezoidal vertical links.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
In order to further clarify the above-described objects, features, and advantages of the present invention, preferred embodiments of the present invention will be described below and described in more detail with reference to the drawings.
[0015]
3 and 4 are plan views of the electrode array structure of the IPS-LCD according to the first embodiment of the present invention. In the pixel area 26, a comb-shaped common electrode 28 comprises a bar 28a and three teeth 28b, 28c, 28d, and a comb-shaped electrode electrode 30 comprises a bar 30a and two Teeth 30b and 30c are provided. The two teeth 30b, 30c are arranged at an interval between the three teeth 28b, 28c, 28d, and the pixel area 26 is divided into four sub-pixel areas 261, 262, 263, 264. As shown in FIG. 3, each tooth 30b, 30c of the pixel electrode 30 is formed by a plurality of trapezoidal vertical links, represents a continuous saddle- shaped side wall, and represents a shape like a Christmas tree. The upper side D1 and the lower side D2 of the trapezoid satisfy the expression D2 ≦ | D1 ± 50 μm |, except when D2 = D1.
[0016]
Before the voltage is applied to the IPS-LCD, the liquid crystal molecules 32 are aligned in the direction indicated by the arrow A, so that the main axis of the liquid crystal molecules 32 is parallel to the teeth 28b, 28c, 28d of the common electrode 28. After the voltage is applied to the IPS-LCD, an in-plane electric field is formed between the teeth 28b, 28c, 28d of the common electrode 28 and the teeth 30b, 30c of the pixel electrode 30, and then the liquid crystal The molecules 32 rotate in the direction of the transverse electric field. For example, the liquid crystal molecules 32a located in the first sub-pixel area 261 rotate counterclockwise to become dotted-line molecules 32a ′. Thereby, the tooth 30b of the pixel electrode 30 becomes two separated domains. Similarly, in the third subpixel area 263 and the fourth subpixel area 264, the tooth 30c of the pixel electrode 30 becomes two separated domains. The continuous square -shaped side wall has a constant inclination of the transverse electric field and corresponds to the rotation angle of the main axis of the liquid crystal molecules 32. The rotation angle θ of the liquid crystal molecules 32 is 0 ° <θ ≦ + 60 ° or −60 ≦ θ. <0 ° is satisfied and coloring phenomenon is avoided.
[0017]
In addition, the liquid crystal molecules 32 located on the teeth 30b and 30c of the pixel electrode 30, that is, the two separated domains are pushed by the molecules 32 rotating in different directions, and thereby located on the teeth 30b and 30c. The liquid crystal molecules 32 stop rotating and represent dark lines. However, the pixel electrode 30 is not a transparent material, and the dark lines represented on the teeth 30b and 30c of the pixel electrode 30 further reduce the aperture ratio (aperture) of the IPS-LCD. When the pixel electrode 30 is made of a transparent material, the aperture ratio of the IPS-LCD increases.
[0018]
According to the electrode array structure described above, the shape of the teeth 30b and 30c of the pixel electrode 30 is further changed as shown in FIG. A rectangular connection is arranged between two adjacent trapezoids.
[0019]
FIG. 4 is a plan view of a TFT structure showing a modification of the electrode array structure shown in FIG.
FIG. 5 is a plan view of a TFT substrate of a first modification of the electrode array structure shown in FIG. In the first modification, the TFT substrate includes a plurality of parallel data lines 36 extending in the vertical direction and a plurality of parallel gate lines 34 extending in the horizontal direction, and forms a matrix of pixel areas 42. Further, the comb-type common electrode 38 and the comb-type first pixel electrode 40 are located in each pixel area 42. The comb-shaped common electrode 38 includes a bar 38a and three rectangular teeth 38b, 38c, and 38d. The comb-shaped first pixel electrode 40 includes a bar 40a and two rectangular teeth 40b and 40c. The two teeth 40b, 40c are located between the three teeth 38b, 38c, 38d, and the pixel area 42 is divided into four sub-pixel areas 421, 422, 423, 424. Further, the TFT device 44 is located in a predetermined region of the gate line 34, the drain electrode is electrically connected to the bar 40a of the first pixel electrode 40, and the source electrode is electrically connected to the extending region 36a of the data line 36. The channel is located between the drain electrode and the source electrode.
[0020]
In addition, the second pixel electrode 46 is formed on the rectangular teeth 40 b and 40 c of the first pixel electrode 40, and a protective layer (not shown) is sandwiched between the first pixel electrode 40 and the second pixel electrode 46. The second pixel electrode 46 made of indium tin oxide (ITO) or other transparent conductive material is formed by a plurality of specific trapezoidal vertical links and has a continuous square -shaped side wall.
[0021]
The upper side D1 and the lower side D2 of the trapezoid satisfy the expression D2 ≦ | D1 ± 50 μm |, except when D2 = D1. Since the continuous square -shaped side wall represents a constant inclination of the transverse electric field and corresponds to the rotation angle of the principal axis of the liquid crystal molecules, the rotation angle of the liquid crystal molecules is preferably controlled to avoid the coloring phenomenon. Further, the first pixel electrode 40 is not a transparent material, and the dark line represented on the teeth 40b and 40c of the first pixel electrode 40 does not further reduce the aperture ratio (aperture) of the IPS-LCD. Further, the second pixel electrode 46 is made of a transparent material, and can increase the aperture ratio of the IPS-LCD.
[0022]
FIG. 6 is a plan view of a TFT substrate showing a second modification of the electrode array structure shown in FIG.
Compared with the electrode array structure shown in FIG. 5, in the second modification shown in FIG. 6, the patterns of the teeth 40b, 40c of the first pixel electrode 40 and the pattern of the second pixel electrode 46 are exchanged. The teeth 40b, 40c of the first pixel electrode 40 are formed by a specific trapezoidal vertical link to form a continuous square -shaped side wall, and the second pixel electrode 46 is formed to be rectangular. This can also avoid the coloring phenomenon and increase the aperture ratio.
[0023]
FIG. 7 is a plan view of a TFT structure showing a third modification of the electrode array structure shown in FIG. Compared with the electrode array substrate shown in FIG. 6, in the third modification shown in FIG. 7, the manufacture of the second pixel electrode 46 is omitted. Teeth 40b and 40c of the first pixel electrode 40 are formed, and the teeth 40b and 40c form a continuous square -shaped side wall. This can also avoid the coloring phenomenon and increase the aperture ratio.
[0024]
FIG. 8 is a plan view of a TFT structure showing a fourth modification of the electrode array structure shown in FIG. Although the electrode array structure shown in FIG. 7 can reduce a complicated manufacturing process and manufacturing cost, the first pixel electrode 40 made of an opaque material has a larger number when the teeth 40b and 40c form a Christmas tree shape. Occupies the area, thereby reducing the aperture ratio. In order to solve this problem, as shown in FIG. 8, in the fourth modified example, the manufacture of the first pixel electrode 40 is omitted, and the pattern of the second pixel electrode 46 is the first pixel electrode 40 shown in FIG. It is formed in the same manner as the pattern. Accordingly, the second pixel electrode 46 includes a bar 46a and two teeth 46b and 46c each having a continuous cross -shaped side wall. This not only avoids the coloring phenomenon and increases the aperture ratio, but also increases the aperture ratio of the IPS-LCD.
[0025]
(Second embodiment)
9 and 10 are plan views showing the electrode array structure of the IPS-LCD according to the second embodiment of the present invention. In the pixel area 26, the electrode array structure shown in FIG. 9 is substantially the same as the electrode array structure shown in FIG. 3 except for the teeth 30 b and 30 c of the pixel electrode 30. In the second embodiment, as shown in FIG. 9, the teeth 30b and 30c of the pixel electrode 30 are formed by a plurality of inverted trapezoidal vertical links, and have an inverted Christmas tree shape. The upper side D2 and the lower side D1 of the inverted trapezoid satisfy the expression D2 ≦ | D1 ± 50 μm |, except when D2 = D1. In addition to avoiding the coloring phenomenon and increasing the aperture ratio, the aperture ratio of the IPS-LCD is further increased. Further, as shown in FIG. 10, the shape of the teeth 30b and 30c of the pixel electrode 30 is changed, and a rectangular connecting portion is disposed between two adjacent inverted trapezoids. Furthermore, according to the four modifications shown in FIGS. 5 to 8, the teeth 30 b and 30 c of the pixel electrode 30 are formed by arranging the first electrode layer and the second electrode layer in a preferred arrangement.
[0026]
(Third embodiment)
11 and 12 are plan views of the electrode array structure of the IPS-LCD according to the third embodiment of the present invention. Compared with the electrode array structure of the first embodiment shown in FIG. 3, in the pixel area 26 of the third embodiment, the pattern of the teeth 28b, 28c, 28d of the common electrode 28 and the teeth 30b, 30c of the pixel electrode 30 are compared. Patterns are exchanged with each other. Thus, the teeth 28b, 28c, 28d of the common electrode 28 are formed by a specific trapezoidal vertical link, have a continuous square -shaped side wall, and the teeth 30b, 30c of the electrode 30 are formed as a rectangle. A coloring phenomenon can be avoided and the aperture ratio can be increased. Further, the shapes of the teeth 28b, 28c, and 28d of the common electrode 28 are changed, and a rectangular connecting portion is disposed between the two trapezoids. Further, as shown in FIG. 12, the shape of the teeth 28b, 28c, 28d of the common electrode 28 is changed to have an inverted Christmas tree shape. The inverted trapezoid is linked vertically to form teeth 28b, 28c, 28d. Furthermore, according to the four modifications shown in FIGS. 5 to 8, the teeth 28 b, 28 c and 28 d of the common electrode 28 are formed by arranging the first electrode layer and the second electrode layer in a preferred arrangement.
[0027]
(Fourth embodiment)
13 and 14 are plan views of the electrode array structure of the IPS-LCD according to the fourth embodiment of the present invention. In the pixel area 26 of the fourth embodiment, the electrode array structure is a collection of the first, second and third embodiments. As shown in FIG. 13, when the patterns of the teeth 28b, 28c, 28d of the common electrode 28 are formed in an inverted Christmas tree shape, the patterns of the teeth 30b, 30c of the pixel electrode 30 are formed in a Christmas tree shape. Alternatively, as shown in FIG. 14, when the patterns of the teeth 28b, 28c, 28d of the common electrode 28 are formed in a Christmas tree shape, the patterns of the teeth 30b, 30c of the pixel electrode 30 are formed in an inverted Christmas tree shape. The Thereby, a coloring phenomenon can be avoided and an aperture ratio can be increased.
[0028]
The shape of the teeth 28b, 28c, 28d of the common electrode 28 and the teeth 30b, 30c of the pixel electrode 30 are changed. A rectangular connection is placed between two adjacent trapezoids. Furthermore, according to the four modifications shown in FIGS. 5 to 8, the teeth 28b, 28c, 28d of the common electrode 28 and the teeth 30b, 30c of the pixel electrode 30 are preferably arranged with the first electrode layer and the second electrode layer. It is formed by.
[0029]
(Fifth embodiment)
FIG. 15 is a plan view of an electrode array structure of an IPS-LCD according to a fifth embodiment of the present invention. In the pixel area 26 of the fifth embodiment, the electrode array structure is an assembly of the fourth embodiment, and the teeth 28b, 28c, 28d of the common electrode 28 are formed by a plurality of trapezoidal vertical links, Each tooth 30b, 30c is formed by a plurality of inverted trapezoidal vertical links. Further, the number of trapezoids of the teeth 28b, 28c, 28d of the common electrode 28 is not equal to the number of inverted trapezoids of the teeth 30b, 30c of the pixel electrode 30.
[0030]
For example, one of the trapezoids of each tooth 30 b of the pixel electrode 30 is two inverted trapezoids adjacent to the tooth 28 b of the common electrode 28. Thereby, the horizontal distance between each tooth 30b of the pixel electrode 30 and the tooth 28b of the common electrode 28 is different from the vertical direction, resulting in a non-uniform electric field. In other embodiments, one of the trapezoids of each tooth 30b of the pixel electrode 30 is closer than the two inverted trapezoids of the teeth 28b of the common electrode 28.
[0031]
In the second sub-pixel area 262, when an external voltage is applied, a minimum lateral distance appears between the point of the scissors -shaped tooth 28c and the side wall of the tooth 30b, so that a high electric field is applied to the scissors -shaped tooth. It is formed near the point 28c. Also, the maximum lateral distance appears between the parallel sidewalls of the teeth 28c and the teeth 30b, so that a low electric field is formed away from the square shaped point.
[0032]
The non-uniform electric field appears in the second sub-pixel area 262 because the difference in electric field is not zero (referred to as an electric field gradient). When the external voltage increases and reaches a predetermined voltage lower than the driving voltage, the liquid crystal molecules 32a arranged in a large electric field start to rotate, and the liquid crystal molecules 32b or 32c arranged in a small electric field remain as they are. Thereafter, as the external voltage continuously increases, the rotation angle of the liquid crystal molecules 32a increases, elastic distorted energy is formed, and the elastic rupture force is applied to the liquid crystal molecules 32b and 32c in the vertical direction. Forward. The liquid crystal molecules 32b and 32c are rotated by the coupling between the elastic breaking force and the low electric field. Preferably, the rotation angle θ of the liquid crystal molecules is 0 ° <θ <20 °. Compared with the known technique using a uniform electric field in each sub-pixel area, the non-uniform electric field in the sub-pixel area 262 reduces the starting voltage, the driving voltage and the switching time of the IPS-LCD.
[0033]
Although preferred embodiments of the present invention have been disclosed in the present invention as described above, these are not intended to limit the present invention in any way, and any person who is familiar with the technology can make various modifications within the spirit and scope of the present invention. Changes can be made, so the protection scope of the present invention is based on what is specified in the claims.
[0034]
【The invention's effect】
Improve the rotation angle of the liquid crystal molecules to eliminate the coloring phenomenon and increase the aperture ratio of the IPS-LCD.
[Brief description of the drawings]
FIG. 1 is a plan view showing a color image corresponding to a viewing angle.
FIG. 2 is a plan view of an electrode array structure of a known IPS-LCD.
FIG. 3 is a plan view of the electrode array structure of the IPS-LCD according to the first embodiment of the present invention.
FIG. 4 is a plan view of the electrode array structure of the IPS-LCD according to the first embodiment.
FIG. 5 is a plan view of a TFT structure showing a first modification of the electrode array structure shown in FIG. 3;
6 is a plan view of a TFT structure showing a second modification of the electrode array structure shown in FIG. 3. FIG.
7 is a plan view of a TFT structure showing a third modification of the electrode array structure shown in FIG. 3. FIG.
8 is a plan view of a TFT structure showing a fourth modification of the electrode array structure shown in FIG. 3. FIG.
FIG. 9 is a plan view of an electrode array structure of an IPS-LCD according to a second embodiment of the present invention.
FIG. 10 is a plan view of an electrode array structure of an IPS-LCD according to the second embodiment.
FIG. 11 is a plan view of an electrode array structure of an IPS-LCD according to a third embodiment of the present invention.
FIG. 12 is a plan view of an electrode array structure of an IPS-LCD according to the third embodiment.
FIG. 13 is a plan view of an electrode array structure of an IPS-LCD according to a fourth embodiment of the present invention.
FIG. 14 is a plan view of an electrode array structure of an IPS-LCD according to the fourth embodiment.
FIG. 15 is a plan view of an electrode array structure of an IPS-LCD according to a fifth embodiment of the present invention.
[Explanation of symbols]
26 ... pixel area,
28: Common electrode,
30 ... Pixel electrode 32 ... Liquid crystal molecule,
34 ... Gate line,
36 ... data line,
38 ... Common electrode,
40. First pixel electrode,
42 ... pixel area,
44 ... TFT element,
46 ... second pixel electrode,
261, 262, 263, 264 ... sub-pixel areas,
421, 422, 423, 424 ... sub-pixel areas.

Claims (31)

An electrode array structure in the pixel area of the IPS-LCD,
A comb-shaped common electrode comprising a horizontally extending bar and a plurality of rectangular teeth extending in the first longitudinal direction from the bar;
A comb-shaped pixel electrode including a bar extending horizontally and a plurality of teeth extending in the second longitudinal direction from the bar, each tooth being disposed between adjacent teeth of the common electrode;
Tona is,
Wherein each tooth of the pixel electrode, either formed by a plurality of trapezoidal vertical link or the electrode array structure according to claim Rukoto formed by a plurality of inverted trapezoidal vertical links. The electrode array structure according to claim 1, wherein each tooth of the pixel electrode is adjacent to each tooth of the common electrode. Upper side of the trapezoid D 1 and bottom D 2 is D 2 = D Except for the case of 1, D 2 ≦ | D 1 ± 50 μ m 2. The electrode array structure according to claim 1, wherein | The electrode array structure according to claim 1, wherein two adjacent trapezoids are connected by a rectangular connecting portion. Top side of the inverted trapezoid D2 And bottom D1 Is D 2 = D Except for the case of 1, D 2 ≦ | D 1 ± 50 μ m 2. The electrode array structure according to claim 1, wherein | The electrode array structure according to claim 1, wherein two adjacent inverted trapezoids are connected by a rectangular connecting portion. Each tooth of the pixel electrode is made of indium tin oxide ( ITO The electrode array structure according to claim 1, wherein Each tooth of the pixel electrode is
  A first electrode layer having a rectangular shape;
  A second electrode layer disposed on the first electrode layer;
The electrode array structure according to claim 1, comprising: The second electrode layer is made of indium tin oxide ( ITO )That is
9. The electrode array structure according to claim 8, wherein Each tooth of the pixel electrode is
  A first electrode layer;
  A second electrode layer disposed on the first electrode layer and having a rectangular shape;
The electrode array structure according to claim 1, comprising: The second electrode layer is made of indium tin oxide ( ITO )That is
11. The electrode array structure according to claim 10, wherein IPS-LCD An electrode array structure in the pixel area of
  A comb-shaped common electrode comprising a bar extending horizontally and a plurality of teeth extending in the first longitudinal direction from the bar;
  A bar extending horizontally and a plurality of rectangular teeth extending in the second longitudinal direction from the bar, each tooth being a comb pixel electrode disposed between adjacent teeth of the common electrode;
Consists of
  Each electrode of the common electrode is formed by a plurality of trapezoidal vertical links or a plurality of inverted trapezoidal vertical links. The electrode array structure according to claim 12, wherein each tooth of the pixel electrode is adjacent to each tooth of the common electrode. Upper side of the trapezoid D 1 and bottom D 2 is D 2 = D Except for the case of 1, D 2 ≦ | D 1 ± 50 μ m The electrode array structure according to claim 12, wherein | The electrode array structure according to claim 12, wherein two adjacent trapezoids are connected by a rectangular connecting portion. Top side of the inverted trapezoid D2 And bottom D1 Is D 2 = D Except for the case of 1,
D 2 ≦ | D 1 ± 50 μ m The electrode array structure according to claim 12, wherein | The electrode array structure according to claim 12, wherein two adjacent inverted trapezoids are connected by a rectangular joint. Each tooth of the common electrode is made of indium tin oxide ( ITO The electrode array structure according to claim 12, wherein: Each tooth of the common electrode is
  A first electrode layer having a rectangular shape;
  A second electrode layer disposed on the first electrode layer;
The electrode array structure according to claim 12, comprising: The second electrode layer is made of indium tin oxide ( ITO 20. The electrode array structure according to claim 19, wherein Each tooth of the common electrode is
  A first electrode layer;
  A second electrode layer disposed on the first electrode layer and having a rectangular shape;
The electrode array structure according to claim 12, comprising: The second electrode layer is made of indium tin oxide ( ITO The electrode array structure according to claim 21, wherein IPS-LCD An electrode array structure in the pixel area of
  A comb-shaped common electrode comprising a bar extending horizontally and a plurality of teeth extending in the first longitudinal direction from the bar;
  A comb-shaped pixel electrode including a horizontally extending bar and a plurality of teeth extending in the second longitudinal direction from the bar, each tooth being disposed between adjacent teeth of the common electrode;
Consists of
  Each electrode of the common electrode is formed by a plurality of trapezoidal vertical links, and each tooth of the pixel electrode is formed by a plurality of inverted trapezoidal vertical links. 24. The electrode array structure according to claim 23, wherein each tooth of the pixel electrode is adjacent to each tooth of the common electrode. Upper side of the trapezoid D 1 and bottom D 2 is D 2 = D Except for the case of 1, D 2 ≦ | D 1 ± 50 μ m The electrode array structure according to claim 23, wherein | 24. The electrode array structure according to claim 23, wherein two adjacent trapezoids are connected by a rectangular connecting portion, and two adjacent inverted trapezoids are connected by a rectangular connecting portion. 24. The electrode array structure according to claim 23, wherein the number of trapezoids of each tooth of the common electrode is not equal to the number of inverted trapezoids of each tooth of the pixel electrode. 28. The electrode array structure of claim 27, wherein an electric field gradient is formed between the teeth of the common electrode and the adjacent teeth of the pixel electrode to form a non-uniform electric field. 28. The electrode array structure according to claim 27, wherein a rotation angle of liquid crystal molecules between the teeth of the common electrode and the adjacent teeth of the pixel electrode is 0 ° to 20 °. Each tooth of the common electrode is made of indium tin oxide ( ITO 24. The electrode array structure according to claim 23, wherein: Each tooth of the pixel electrode is made of indium tin oxide ( ITO 24. The electrode array structure according to claim 23, wherein:

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