CN1350196A - Wide-viewing angle liquid crystal display - Google Patents

Abstract

A liquid crystal display comprises two parallel first and second substrates, the first substrate has a first surface and a first electrode disposed on the first surface, and the second substrate has a second surface and a pixel electrode disposed on the second surface. The liquid crystal display further comprises at least one notch or bump which is approximately in a strip shape and is arranged on the pixel electrode along a first direction, and a plurality of liquid crystal molecules with negative dielectric constant anisotropy are filled between the first electrode and the pixel electrode along a second direction, the first direction and the second direction are both parallel to the first electrode and the pixel electrode, and an angle is formed between the second direction and the first direction.

Description

LCD display with wide viewing angle

The invention relates to a liquid crystal display (liquid crystal display, LCD), in particular to a liquid crystal display with a wide viewing angle.

Liquid crystal displays have the characteristics of light and thin appearance, low power consumption and no radiation pollution. They have been widely used in portable information products such as notebook computers (notebooks) and personal digital assistants (PDAs), and have even gradually replaced existing desktops. Trends in CRT monitors for computers. Liquid crystal molecules have different polarization or refraction effects on light in different alignment states. Liquid crystal displays use this characteristic of liquid crystal molecules to control the penetration of light, thereby enabling the liquid crystal display to produce rich images. However, the viewing angle of the existing liquid crystal display is affected by the molecular structure and optical properties of the liquid crystal. Therefore, it is necessary to develop a liquid crystal display with a new structure to provide a better and wider viewing angle.

Please refer to FIGS. 1 and 2 . FIG. 1 is a schematic diagram of a bright state of a conventional twisted linear (twist nematic, TN) liquid crystal display 10 , and FIG. 2 is a schematic diagram of a dark state of a conventional twisted linear liquid crystal display 10 . As shown in Figure 1, the existing TN-LCD 10 includes an upper substrate 12, a lower substrate 14 parallel to the upper substrate 12, an upper electrode 16 disposed below the upper substrate 12, and a lower electrode 18 disposed above the lower substrate 14. , two polarizers (polarizer) 20, 22 are respectively arranged above the top of the upper substrate 12 and below the lower substrate 14, and a plurality of liquid crystal molecules 24 with positive dielectric constant anisotropy (positive dielectric constant anisotropy) are filled in the upper substrate 12 and the lower substrate 14. The polarization direction P1 of the polarizer 20 is parallel to the paper surface, the polarization direction P2 of the polarizer 22 is perpendicular to the paper surface, and the alignment direction of the liquid crystal molecules 24 is gradually converted from a direction parallel to the paper surface to a vertical direction from top to bottom. orientation on paper.

As shown in FIG. 1 , when no voltage is applied to the upper electrode 16 and the lower electrode 18 of the liquid crystal display 10 , the liquid crystal molecules 24 are not affected by the electric field and are parallel to the polarizers 20 and 22 respectively. A light (not shown) enters from below and is polarized by the polarizer 22 , so that the polarized light perpendicular to the plane of the paper can pass through the lower substrate 14 . Then the polarized light enters the liquid crystal molecules 22 to cause refraction. The incident light follows the arrangement direction of the liquid crystal molecules 22, and gradually changes the polarization direction from the direction perpendicular to the paper to the direction parallel to the paper. Finally, when the polarized light is about to pass through the upper substrate 12, since the traveling direction of the polarized light is parallel to the polarization direction of the polarizer 20, this is the bright state of the TN-LCD 10.

As shown in FIG. 2, when a voltage is applied between the upper electrode 16 and the lower electrode 18, an electric field is generated between the upper substrate and the lower substrate. Since the long axes of positive liquid crystal molecules with positive dielectric constant tend to be aligned parallel to the electric field direction 26 , the liquid crystal molecules 24 are aligned perpendicular to the upper and lower substrates 12 , 14 . Therefore, the traveling direction of the light is perpendicular to the polarizer 20 , and the light cannot pass through the polarizer 20 . Therefore, the observer positioned above the upper substrate 12 cannot see any light, which is the dark state of the TN-LCD 10.

In order to reduce the initial voltage (threshold voltage) of TN-LCD 10, and make the liquid crystal molecules 24 more likely to be affected by the electric field and rotate, the liquid crystal molecules 24 in FIG. show). However, this kind of pretilt angle causes the asymmetry of the liquid crystal molecules 24, so that the light intensity seen by the observer at different angles is not the same, so that the viewing angle of the TN-LCD 10 is limited when it is displayed. And when displaying, due to the adhesion between the liquid crystal molecules 24 and the substrates 12, 14, in fact only the liquid crystal molecules 24 in the central part between the two substrates 12, 14 will be completely perpendicular to the substrates 12, 14, adjacent to the substrates 12, 14. The liquid crystal molecules 24 of 14 maintain an angle (not shown) with the substrates 12 and 14 . In addition, considering the aforementioned effect of the pretilt angle, the liquid crystal molecules 24 in the dark state are not uniformly arranged as shown in FIG. 2 , so the effect of the dark state is not good, and the contrast is reduced. In addition, the viewing angle of TN-LCD10 is also greatly limited, and even the left and right viewing angles are different.

The object of the present invention is to provide a liquid crystal display with a wide viewing angle to solve the above problems.

The purpose of the present invention is achieved by providing a liquid crystal display (liquid crystal display, LCD), which includes: a first substrate, which includes a first surface; a second substrate, which includes a second surface, The second surface is parallel to the first surface of the first substrate, and a pixel area is defined on the second surface; a first electrode is arranged on the first surface of the first substrate; a pixel electrode is arranged on the first surface of the first substrate. On the pixel area of the second substrate, and the pixel electrode has a first strip-shaped first gap (slit) extending along a first direction; and a plurality of negative dielectric constant anisotropy (negative dielectric constant anisotropy) ) liquid crystal molecules are filled between the first electrode and the pixel electrode, and the long axes of the liquid crystal molecules are horizontally arranged between the first electrode and the pixel electrode along a second direction, and the second direction is the same as the second direction There is a first angle between one direction; wherein when a voltage is applied between the first electrode and the pixel electrode, a bias electric field will be formed between the first electrode and the pixel electrode, then (a) the The deflection electric field has a first horizontal deflection electric field component adjacent to the first notch, and the first horizontal deflection electric field component is perpendicular to the first direction, so that the long axis of the liquid crystal molecules adjacent to the first notch turns to be parallel to the first direction, (b) and the deflection electric field has no horizontal deflection electric field component adjacent to the first electrode, so that the long axis of the liquid crystal molecules adjacent to the first electrode is maintained in the second direction, (c) between the first electrode The liquid crystal molecules between an electrode and the first gap gradually turn from the second direction to the first direction.

The present invention also provides a liquid crystal display, which includes: a first substrate including a first surface; a second substrate including a second surface, the second surface and the first surface of the first substrate One surface is parallel to each other and defines a pixel region on the second surface; a first electrode is arranged on the first surface of the first substrate; a pixel electrode is arranged on the pixel region of the second substrate; at least a first approximately elongated bump, the long axis of the first bump is disposed on the pixel electrode along a first direction; and a plurality of liquid crystal molecules with negative dielectric constant anisotropy (negative dielectric constant anisotropy) are filled in the Between the first electrode and the pixel electrode, when a bias electric field is not applied, the long axes of the liquid crystal molecules are horizontally arranged between the first electrode and the pixel electrode along a second direction, and the second direction is the same as the second direction. There is a first angle between one direction; wherein when a voltage is applied between the first electrode and the pixel electrode, the bias electric field will be formed between the first electrode and the pixel electrode, then (a) the The deflection electric field has a first horizontal deflection electric field component adjacent to the first bump, and the first horizontal deflection electric field component is perpendicular to the first direction, so that the long axis of the liquid crystal molecules adjacent to the first bump turns to be parallel to the The first direction, (b) and the bias electric field has no horizontal bias electric field component adjacent to the first electrode, so that the long axis of the liquid crystal molecules adjacent to the first electrode is maintained in the second direction, (c) between The liquid crystal molecules between the first electrode and the first bump of the pixel electrode gradually turn from the second direction to the first direction.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of a bright state of an existing twisted linear liquid crystal display;

FIG. 2 is a schematic diagram of a dark state of an existing twisted linear liquid crystal display;

3 is a schematic diagram of a liquid crystal display with high light and dark contrast in the present invention;

Fig. 4 is the top view of the liquid crystal display of Fig. 3;

5 is a schematic cross-sectional view of the liquid crystal display of FIG. 3 along a second direction;

FIG. 6 is a schematic diagram of the liquid crystal display in FIG. 3 when it is in a bright state;

Fig. 7 is the top view of the second embodiment of the liquid crystal display of the present invention;

8 is a schematic cross-sectional view of a second embodiment of the liquid crystal display of the present invention;

9 is a top view of a third embodiment of the liquid crystal display of the present invention;

Fig. 10 is the upper view of the fourth embodiment of the liquid crystal display of the present invention;

Fig. 11 is the top view of the fifth embodiment of the liquid crystal display of the present invention;

12 is a top view of the sixth embodiment of the liquid crystal display of the present invention;

13 is a top view of a seventh embodiment of the liquid crystal display of the present invention;

Fig. 14 is the top view of the eighth embodiment of the liquid crystal display of the present invention;

Fig. 15 is a top view of the ninth embodiment of the liquid crystal display of the present invention. Illustration of symbols

30 liquid crystal display 32 first direction

34 Second direction 35 First polarization direction

36, 46 electric field 37, 47 electric field direction

361 Bias electric field 3611, 3612 Bias electric field components

38 third direction 40, 401, 402 liquid crystal molecules

42 Fourth Direction 44 Fifth Direction

461 Bias electric field 4611, 4612 Bias electric field components

100 first substrate 102 first surface

104 first electrode 106 first polarizer

108, 208, 212 gaps 110, 210, 214 bumps

200 second substrate 202 second surface

204 pixel electrodes 206 second polarizer

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a liquid crystal display 30 with high light and dark contrast according to the present invention. As shown in FIG. 3 , the liquid crystal display 30 of the present invention includes a first substrate 100 and a second substrate 200 . The first substrate 100 includes a first surface 102, the second substrate 200 includes a second surface 202, and the second surface 202 is parallel to the first surface 102, and defines a pixel area (not shown in the figure) on the second surface. ). The first substrate 100 can be an upper substrate or a lower substrate. In contrast, the second substrate 200 is a lower substrate or an upper substrate. In the present invention, only the structure in which the first substrate 100 is an upper substrate and the second substrate 200 is a lower substrate is introduced, but the concept of the present invention can still be applied to a structure in which the two substrates 100 , 200 are upside down. A first electrode 104 is disposed on the first surface 102 of the first substrate 100 , and a first polarizer 106 is disposed on the other surface. A pixel electrode 204 is disposed on the second surface 202 of the second substrate 200 , and a second polarizer 206 is disposed on the other surface. The pixel electrode 204 is disposed in the pixel area of the second substrate, and both the first electrode 104 and the pixel electrode 204 are made of a transparent conductive material.

Please refer to FIG. 4 , which is a top view of the liquid crystal display 30 in FIG. 3 . As shown in FIG. 4 , at least one approximately elongated slit 208 is disposed on the pixel electrode 204 , and the long axis of the slit extends along a first direction 32 . A plurality of liquid crystal molecules 40 with negative dielectric constant anisotropy are filled between the first substrate 100 and the second substrate 200, and the long axis of the liquid crystal molecules 40 is along a second direction 34 when no electric field is applied. They are horizontally arranged between the first electrode 104 and the pixel electrode 204 , and there is an angle θ ₁ between the second direction 34 and the first direction 32 .

The second direction 34 is the polarization direction 34 of the second polarizer 206 , and the first polarization direction 35 of the first polarizer 106 is perpendicular to the second polarization direction 34 of the second polarizer 206 . The liquid crystal display 30 is provided with a switch element (not shown), such as a thin film transistor (TFT), on the second surface 202 of the second substrate 200 for controlling the turn-on action of the liquid crystal display 30 . When the switching element is not turned on, that is, no voltage is applied between the first electrode 104 and the pixel electrode 204, and an electric field is formed, at this time, the liquid crystal molecules are arranged in the second direction 34, which is aligned with the polarization direction 35 of the first polarizer 106. Vertically, light cannot pass through the polarizer 106 , so the observer will not see any light exiting from the liquid crystal display 30 , which is the dark state of the liquid crystal display 30 . Because the alignment direction of the liquid crystal molecules is completely perpendicular to the polarization direction 35 of the first polarizer, the dark state of the liquid crystal display of the present invention is a perfect dark state when no electric field is applied.

Please refer to FIGS. 5 and 6 , FIG. 5 is a schematic cross-sectional view of the liquid crystal display 30 in FIG. 3 along the second direction 34 , and FIG. 6 is a schematic view of the liquid crystal display 30 in FIG. 3 in a bright state. As shown in FIG. 5, when the switching element is turned on, that is, when a voltage is applied between the first electrode 104 and the pixel electrode 204, an electric field 36 will be formed between the first electrode 104 and the pixel electrode 204, and the direction of the electric field 37 perpendicular to the second direction 34 . On the second substrate 200 , a bias electric field 361 is generated near the gap 208 adjacent to the pixel electrode 204 . Therefore, a first horizontal electric field component 3611 perpendicular to the first direction 32 will be generated near the gap 208, and the negative liquid crystal molecules 40 are arranged in a direction inclined to the vertical electric field. The liquid crystal molecules 402 will gradually turn from the original second direction 34 to the first direction 32 parallel to the alignment direction of the notches 208 . Furthermore, an electric field component 3612 perpendicular to the second direction 34 will be generated near the gap 208, and the electric field component 3612 is perpendicular to the long axis of the liquid crystal molecules 40, so that the liquid crystal molecules 40 will not rotate parallel to the direction of the electric field 37, and Keep rotating on a fixed plane.

In addition, the deflection electric field 361 has no horizontal deflection electric field component adjacent to the first electrode 104 , so that the long axes of the liquid crystal molecules 401 adjacent to the first electrode 104 are maintained in the second direction 34 . Therefore, the liquid crystal molecules 40 between the first electrode 104 and the first notch 208 of the pixel electrode are gradually turned from the second direction 34 to the first direction 32, resulting in a Twist Nematic (TN) similar to that in the prior art. The bright state of the liquid crystal when no voltage is applied. That is, after the liquid crystal molecules 40 are turned, the light passes through the second polarizer 206 and gradually changes from the second direction 34 to the first direction 32 along with the arrangement direction of the liquid crystal molecules. Since the alignment direction of the liquid crystal molecules is no longer completely perpendicular to the polarization direction 35 of the first polarizer, light can pass through the first polarizer 106 and reach the eyes of the observer, which is the bright state of the liquid crystal display 30 .

In order to achieve the technical idea of the present invention, the liquid crystal display 30 uses liquid crystal molecules 40 with negative dielectric constant anisotropy, and forms a gap 208 on the pixel electrode 204 to generate a biasing electric field 361 . Utilizing the principle that the long axis of the liquid crystal molecules 40 with negative dielectric constant anisotropy tends to be perpendicular to the electric field, the liquid crystal molecules 40 near the gap 208 can turn on the same plane. The 40 angles of the liquid crystal molecules are all the same, so it is not easy to cause the limitation of the viewing angle. And in the present invention, the dark state generated before the electric field is not applied is a very dark dark state, because the liquid crystal molecules 40 are arranged horizontally according to the first direction 34 of the polarization direction of the second polarizer, so the liquid crystal molecules and the first polarizer are aligned. The polarization directions 35 are all vertical, so a very good dark state can be obtained. Due to the improved dark state, the contrast of the liquid crystal display of the present invention can be improved. The viewing angle is also related to the contrast. When the contrast is increased, the viewing angle will be larger, so the present invention can provide a liquid crystal display with a wide viewing angle and a high light and dark contrast.

Please refer to FIG. 7 and FIG. 8 , FIG. 7 is a top view of the second embodiment of the liquid crystal display of the present invention, and FIG. 8 is a schematic cross-sectional view of the second embodiment of the liquid crystal display of the present invention. In the aforementioned embodiments, the notch 208 is used to form a bias electric field, and form electric field components perpendicular to the first direction 32 and the second direction 34 . The second embodiment utilizes a bump 210 to bias the electric field. The bump 210 can be made of a conductive material or a dielectric material. In the present invention, the bump 210 is made of a dielectric material to simplify the manufacturing process and save costs.

As shown in FIG. 7 , the bump 210 is disposed on the surface of the pixel electrode 204 along the first direction 32 . As shown in FIG. 8, when a voltage is applied between the first electrode 104 and the pixel electrode 204 to generate an electric field 44, the electric field is converted into a bias electric field 441 at the bump, and the bias electric field 441 is in the adjacent bump 210. There is a horizontal deflection electric field component 4411 , and the horizontal deflection electric field component 4411 is perpendicular to the first direction 32 , so that the long axis of the liquid crystal molecules 402 adjacent to the bump 210 turns to be parallel to the first direction 32 . And the deflection electric field 441 has no horizontal deflection electric field component near the first electrode 104 , so that the long axes of the liquid crystal molecules 401 near the first electrode 104 are maintained in the second direction 34 . Viewed as a whole, the liquid crystal molecules 40 rotate, making the liquid crystal display a bright state.

Please refer to FIG. 9 and FIG. 10 , FIG. 9 is a top view of a third embodiment of the liquid crystal display of the present invention, and FIG. 10 is a top view of a fourth embodiment of the liquid crystal display of the present invention. The liquid crystal display of the present invention can be provided with the notch 208 and the protrusion 210 at the same time to meet different design requirements. As shown in FIG. 9 , a third embodiment of the present invention provides one or more protrusions 210 within the notch 208 . As shown in FIG. 10 , in the fourth embodiment of the present invention, at least one bump 210 is arranged on the surface of the pixel electrode 204 between the gaps 208 , and bumps 212 can also be arranged inside the gap 208 and between the gaps 208 . Both the notches 208 and the bumps 210 are arranged along the first direction 32 , otherwise the liquid crystal molecules 40 cannot turn neatly.

Please refer to FIG. 11 and FIG. 12 , FIG. 11 is a top view of the fifth embodiment of the liquid crystal display of the present invention, and FIG. 12 is a top view of the sixth embodiment of the liquid crystal display of the present invention. In order to further increase the viewing angle of the liquid crystal display 30 , notches or bumps in different directions can be formed on the pixel electrodes 204 . As shown in FIG. 11 , in addition to the notch 208 , the liquid crystal display 30 includes at least one substantially elongated notch 212 disposed on the pixel electrode 204 along a third direction 38 . An angle θ ₂ is formed between the third direction 38 and the second direction 34 in which the liquid crystal molecules are arranged horizontally. When an external voltage drop is applied between the first electrode 104 and the pixel electrode 204, the liquid crystal molecules (not shown in FIG. 11 ) adjacent to the gap 212 of the pixel electrode 204 will turn from the second direction 34 to a direction parallel to the third direction 38 arrangement.

As shown in FIG. 12 , in the sixth embodiment of the liquid crystal display 30 , the notch 208 and the notch 212 are connected to each other. In addition, one or more protrusions 210 can be disposed in the notch 208 or between two notches 208 . At least one bump (not shown) may also be disposed in the notch 212 or between the two notches 212 along the third direction 38 , and the bump may optionally be connected to the bump 210 .

Please refer to FIG. 13 , which is a top view of a seventh embodiment of the liquid crystal display of the present invention. If only the bumps 210 are disposed on the pixel electrodes 204 , the bumps 214 may also be disposed along the third direction 38 to make the arrangement of the liquid crystals symmetrical and improve the display quality of the liquid crystal display 30 . Similarly, whether the bump 214 is connected to the bump 210 or not can be selected. Referring to FIG. 14 again, FIG. 14 is a top view of the eighth embodiment of the liquid crystal display of the present invention, and bumps 112 can also be arranged on the first electrodes along the fourth direction 42 , and bumps 114 can be arranged along the fifth direction 44 . The fourth direction 42 forms an included angle θ ₃ with the second direction 34 , and the fifth direction 44 forms an included angle θ ₄ with the second direction 34 . In this way, the alignment of the liquid crystals can be made symmetrical, so as to increase the display quality of the liquid crystal display 30 . Similarly, whether the bump 112 is connected to the bump 114 can also be selected.

Please refer to FIG. 15 , which is a top view of a ninth embodiment of the liquid crystal display of the present invention. The foregoing embodiments are only designed for electrodes on one side, but the concept of the present invention can be extended to electrodes on both sides, that is to say, various numbers and various Notches or bumps in the direction. As shown in FIG. 15, FIG. 15 depicts a simplified structure. In the ninth embodiment, at least one notch 108 and at least one bump 110 are arranged on the first electrode 104 along the fifth direction 44, and on the pixel electrode 204 At least one notch 208 and at least one protrusion 210 are disposed along the fourth direction 42 . When the applied voltage is between the first electrode 104 and the pixel electrode 204, the liquid crystal molecules adjacent to the notch 108 of the first electrode 104 and the bump 110 will be arranged in a direction parallel to the fifth direction 44, while the notch adjacent to the pixel electrode 204 The liquid crystal molecules of the bumps 208 and 210 are aligned in a direction parallel to the fourth direction 42 .

The characteristic of the liquid crystal display 30 of the present invention is that liquid crystal molecules 40 with negative dielectric constant anisotropy are used, and gaps or bumps are arranged on the electrodes to form a biased electric field. The deflection electric field includes a component perpendicular to the long axis of the liquid crystal and parallel to the long axis of the liquid crystal. Therefore, the present invention can make the liquid crystal molecules 40 rotate on the same plane, so that the image seen by the observer is not affected by the pretilt angle of the liquid crystal molecules 40, and the liquid crystal is improved. The display quality of the monitor.

Compared with the existing TN-LCD 10, the liquid crystal molecules 40 of the liquid crystal display 30 have a relatively small pretilt angle, so that the luminous flux passing through the liquid crystal molecules 40 will not be changed by different observation positions, so the liquid crystal display 30 of the present invention can expand the LCD. wide range of viewing angles, and solve the problem of asymmetric left and right viewing angles in the existing TN-LCD 10.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the patent of the present invention.

Claims (32)

1. A LCD (liquid crystal display, LCD), it includes:

   One first substrate, it includes a first surface;

   One second substrate, it includes a second surface, and this second surface is parallel relative with the first surface of this first substrate, and definition has a pixel region on this second surface;

   One first electrode is located on the first surface of this first substrate;

   One pixel electrode is located on the pixel region of this second substrate, and has first breach (slit) of an approximate strip that extends along a first direction on this pixel electrode; And

   The liquid crystal molecule filling of a plurality of negative permittivity anisotropy (negative dielectric constant anisotropy) is between this first electrode and this pixel electrode, and this long axis of liquid crystal molecule is to be horizontally arranged between this first electrode and this pixel electrode along a second direction, has one first angle between this second direction and this first direction;

   Wherein when between this first electrode and this pixel electrode, adding a voltage, can form a deflection electric field between this first electrode and this pixel electrode, then (a) this deflection electric field has one first horizontal deflection electric field component in contiguous this first indentation, there, and this first horizontal deflection electric field component is perpendicular to this first direction, and make the long axis of liquid crystal molecule of contiguous this first breach turn to parallel this first direction, (b) and this deflection electric field there is no the horizontal deflection electric field component in contiguous this first electrode place, and make the long axis of liquid crystal molecule of contiguous this first electrode maintain this second direction, (c) and the liquid crystal molecule between this first electrode and this first indentation, there is to redirect to this first direction gradually by this second direction.
2. 2. LCD as claimed in claim 1, wherein this pixel electrode includes at least one first projection that extends along this first direction in addition, and this first projection is positioned within this first breach.
3. 3. LCD as claimed in claim 2, wherein this first projection is made of a photoresist layer, a conductive material or a dielectric material.
4. 4. LCD as claimed in claim 1, wherein this pixel electrode includes second projection of at least one approximate strip in addition, and this second projection parallels with this first breach.
5. 5. LCD as claimed in claim 4, wherein this second projection is made of a photoresist layer, a conductive material or a dielectric material.
6. 6. LCD as claimed in claim 1, wherein the minor face width of first breach of this pixel electrode is between 5 to 20 microns (μ m).
7. 7. LCD as claimed in claim 6, wherein the minor face width of this first breach is 10 microns (μ m).
8. 8. LCD as claimed in claim 1, wherein this pixel electrode includes second breach of at least one approximate strip in addition, this second breach major axis extends along a third direction, this third direction differs from this first direction, accompany one second angle between this third direction and this second direction, when add this voltage between this first electrode and this pixel electrode when forming this deflection electric field, this deflection electric field has one second horizontal deflection electric field component in contiguous this second indentation, there, and this second horizontal deflection electric field component is one perpendicular to this third direction, and makes the long axis of liquid crystal molecule of contiguous this second breach be diverted to this third direction by this second direction.
9. 9. LCD as claimed in claim 8, wherein this first breach is connected to second breach.
10. 10. LCD as claimed in claim 8, wherein this pixel electrode includes the 3rd projection of at least one approximate strip that extends along this third direction in addition, and the 3rd projection is located within this second breach.
11. 11. LCD as claimed in claim 8, wherein this pixel electrode includes the 4th projection of at least one approximate strip in addition, and the 4th projection parallels with this second breach.
12. 12. LCD as claimed in claim 1, wherein this first electrode include in addition at least one along a four directions the 3rd breach to the approximate strip that extends, and this four directions to and the horizontal second direction of this liquid crystal molecule between accompany a third angle degree, when adding this voltage when between this first electrode and this pixel electrode, forming this deflection electric field with meeting, this deflection electric field has one the 3rd horizontal deflection electric field component in contiguous the 3rd indentation, there, and the 3rd horizontal deflection electric field component perpendicular to this four directions to, and the long axis of liquid crystal molecule that makes contiguous the 3rd breach by this second direction be diverted to this four directions to.
13. 13. LCD as claimed in claim 12, wherein this first electrode include in addition at least one along this four directions the 5th protruding lacking to the approximate strip that extends, and the 5th projection is positioned within the 3rd breach.
14. 14. LCD as claimed in claim 12, wherein this first electrode includes the 6th projection of at least one approximate strip in addition, and the 6th projection parallels in the 3rd breach.
15. 15. LCD as claimed in claim 12, wherein this first electrode includes the 4th breach of at least one approximate strip that extends along one the 5th direction in addition, accompany one the 4th angle between the 5th direction and this second direction, and the 5th direction differ from this four directions to, when adding this voltage when between this first electrode and this pixel electrode, forming this deflection electric field with meeting, this deflection electric field has one the 4th horizontal deflection electric field component in contiguous the 4th indentation, there, and the 4th horizontal deflection electric field component is perpendicular to the 5th direction, and makes the long axis of liquid crystal molecule of contiguous the 4th breach be diverted to the 5th direction by this second direction.
16. 16. LCD as claimed in claim 15, wherein the 3rd breach is connected with the 4th breach.
17. 17. LCD as claimed in claim 15, wherein this first electrode include in addition at least one along this four directions the 7th projection to the approximate strip that extends, and the 7th projection is located within the 4th breach.
18. 18. LCD as claimed in claim 15, wherein this first electrode includes the 8th projection of at least one approximate strip in addition, and parallels with the 4th breach.
19. 19. a LCD, it includes:

    One first substrate, it includes a first surface;

    One second substrate, it includes a second surface, and this second surface is parallel relative with the first surface of this first substrate, and definition has a pixel region on this second surface;

    One first electrode is located on the first surface of this first substrate;

    One pixel electrode is located on the pixel region of this second substrate;

    First projection of at least one approximate strip, this first projection major axis is located on this pixel electrode along a first direction; And the liquid crystal molecule filling of a plurality of negative permittivity anisotropy (negative dielectric constantanisotropy) is between this first electrode and this pixel electrode, when not applying a deflection electric field, this long axis of liquid crystal molecule is horizontally arranged between this first electrode and this pixel electrode along a second direction, and has one first angle between this second direction and this first direction;

    Wherein when adding a voltage between this first electrode and this pixel electrode the time, can form this deflection electric field between this first electrode and this pixel electrode, then (a) this deflection electric field has one first horizontal deflection electric field component in contiguous this first projection place, and this first horizontal deflection electric field component is perpendicular to this first direction, and make the long axis of liquid crystal molecule of contiguous this first projection turn to parallel this first direction, (b) and this deflection electric field there is no the horizontal deflection electric field component in contiguous this first electrode place, and make the long axis of liquid crystal molecule of contiguous this first electrode maintain this second direction, (c) and the liquid crystal molecule between the first projection place of this first electrode and this pixel electrode is to be diverted to this first direction gradually by this second direction.
20. 20. LCD as claimed in claim 19, wherein this first projection is made of a photoresist layer, a conductive material or a dielectric material.
21. 21. LCD as claimed in claim 19, wherein this pixel electrode includes first breach of at least one approximate strip in addition, and this first breach parallels with this first projection.
22. 22. LCD as claimed in claim 19, wherein the minor axis width of first projection of this pixel electrode is between 5 to 20 microns (μ m).
23. 23. LCD as claimed in claim 22, wherein the minor axis width of this first projection is 10 microns (μ m).
24. 24. LCD as claimed in claim 19, wherein this pixel electrode includes second projection of at least one approximate strip in addition, this second projection major axis extends along a third direction, this third direction differs from this first direction, and accompany one second angle between this third direction and this second direction, when add this voltage between this first electrode and this pixel electrode when forming this deflection electric field, this deflection electric field has one second horizontal deflection electric field component in contiguous this second projection place, and this second horizontal deflection electric field component is one perpendicular to this third direction, and makes the long axis of liquid crystal molecule of contiguous this second projection be diverted to this third direction by this second direction.
25. 25. LCD as claimed in claim 24, wherein this first projection is connected with this second projection.
26. 26. LCD as claimed in claim 24, wherein this second projection is made of a photoresist layer, a conductive material or a dielectric material.
27. 27. LCD as claimed in claim 24, wherein this pixel electrode includes second breach of at least one approximate strip in addition, and this second breach is parallel with this second projection.
28. 28. LCD as claimed in claim 19, wherein this first electrode includes the 3rd projection of at least one approximate strip in addition, the 3rd projection major axis along a four directions to extension, this four directions to and this second direction between accompany a third angle degree, when between this first electrode and this pixel electrode, adding this voltage when forming this deflection electric field, this deflection electric field has one the 3rd horizontal deflection electric field component in contiguous the 3rd projection place, and the 3rd horizontal deflection electric field component be one perpendicular to this four directions to, and the long axis of liquid crystal molecule that makes contiguous the 3rd projection by this second direction be diverted to this four directions to.
29. 29. LCD as claimed in claim 28, wherein this first electrode includes the 3rd breach of at least one approximate strip in addition, and parallels with the 3rd projection.
30. 30. LCD as claimed in claim 28, wherein this first electrode includes the 4th projection of at least one approximate strip in addition, the 4th projection major axis extends along one the 5th direction, the 5th direction differ from this four directions to, accompany one the 4th angle between the 5th direction and this second direction, when add this voltage between this first electrode and this pixel electrode when forming this deflection electric field, this deflection electric field has one the 4th horizontal deflection electric field component in contiguous the 4th projection place, and the 4th horizontal deflection electric field component is one perpendicular to the 5th direction, and makes the long axis of liquid crystal molecule of contiguous the 4th projection be diverted to the 5th direction by this second direction.
31. 31. LCD as claimed in claim 30, wherein the 3rd projection is connected with the 4th projection.
32. 32. LCD as claimed in claim 30, wherein this first electrode includes the 4th breach of at least one approximate strip in addition, and parallels with the 4th projection.

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