JP2000194016A - Multidomain liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multidomain liquid crystal display element of which processes are simplified and multidomain effect is exhibited. SOLUTION: The multidomain liquid crystal display element is composed of a first substrate and a second substitute facing each other, a liquid crystal layer formed between the first substrate and the second substitute, a plurality of gate wiring 1 and data wiring 3 formed on the first substrate lengthwise and crosswise and defining pixel regions, a pixel electrode 13 integrally formed in the pixel region, a common auxiliary electrode 15 which is formed in the same layer as the gate wirings 1 and is formed so as to surround the pixel electrode 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a multi-domain liquid crystal display device in which a common auxiliary electrode is formed in the same layer as a gate wiring so as to surround a pixel region, thereby distorting an electric field. multi-domain liquid cry
stal display device).

[0002]

2. Description of the Related Art Recently, there has been proposed a liquid crystal display device in which a liquid crystal is driven by an auxiliary electrode which is electrically insulated from a pixel electrode without aligning the liquid crystal. FIG. 1 is a sectional view of a unit pixel of a conventional liquid crystal display device.

A conventional liquid crystal display device comprises a first substrate and a second substrate.
A substrate is provided on the first substrate, and the first
A plurality of data lines and gate lines for dividing the substrate into a plurality of pixel regions; and a gate electrode, a gate insulating film, a semiconductor layer, an ohmic contact layer (O
hmic contact layer) and thin film transistors (Thin Film Transi
stor; TFT), a protective film (37) formed over the entire first substrate, a pixel electrode (13) formed on the protective film (37) so as to be connected to the drain electrode, and the gate insulating film. An auxiliary electrode (21) is provided on the film so as to overlap a part of the pixel electrode (13).

Further, a light-shielding layer (25) for blocking light leaking from the gate wiring, the data wiring and the thin film transistor, and a color filter layer formed on the light-shielding layer (25) are provided on the second substrate. (23), a common electrode (17) formed on the color filter layer (23),
A liquid crystal layer formed between the first substrate and the second substrate is provided.

The open area (27) between the auxiliary electrode (21) formed around the pixel electrode (13) and the common electrode (17)
The liquid crystal panel drives the liquid crystal molecules in a unit pixel by distorting an electric field applied to the liquid crystal layer. This means that when a voltage is applied to the liquid crystal display element, the director of the liquid crystal is directed in a desired direction by the dielectric energy due to the distorted electric field.

[0006] However, such a conventional liquid crystal display element requires a common electrode (17) to obtain a multi-domain effect.
Must have an open area (27),
During the manufacturing process of the liquid crystal display element, a step of patterning the common electrode (17) must be added. In addition, those having no open area and those having a narrow width have a relatively low electric field distortion degree required for domain division, and thus the time required for the director of the liquid crystal to become stable is relatively long. There is a problem that becomes.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a common auxiliary electrode formed so as to surround a pixel region in the same layer as a gate wiring.
It is an object of the present invention to provide a multi-domain liquid crystal display device which simplifies the process and exhibits a multi-domain effect.

[0008]

In order to achieve the above object, a multi-domain liquid crystal display device according to the present invention comprises a first substrate and a second substrate opposed to each other, and a space between the first substrate and the second substrate. A liquid crystal layer, a plurality of gate lines and data lines formed vertically and horizontally on the first substrate to define a pixel region, and a pixel electrode integrally formed in the pixel region,
A common auxiliary electrode formed in the same layer as the gate line and surrounding the pixel region; a gate insulating film formed on the entire first substrate;
A protective film formed on the entire substrate, a light-shielding layer formed on the second substrate, a color filter layer formed on the light-shielding layer, a common electrode formed on the color filter layer, An alignment film is formed on at least one of the first substrate and the second substrate.

The multi-domain liquid crystal display device may further include a storage electrode connected to the pixel electrode from below the protective film and formed to overlap the gate line or a common auxiliary electrode. Good. The liquid crystal has a positive or negative dielectric anisotropy, and the liquid crystal layer includes a chiral dopant.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multi-domain liquid crystal display device according to the present invention will be described in detail with reference to the drawings. FIG.
3 is a plan view of the multi-domain liquid crystal display according to the first embodiment of the present invention, and FIG.
5 to 8 are sectional views taken along line II-II 'in FIG.
FIG.

As shown in FIGS. 5 to 8, the multi-domain liquid crystal display device of the present invention includes a first substrate (31) and a second substrate (33). A plurality of data lines (3) and a gate line (1) formed vertically and horizontally on the first substrate (31) to divide the first substrate (31) into a plurality of pixel regions; A) a common auxiliary electrode (15) formed in the same layer as in (1) and distorting the electric field; and a gate electrode (11), a gate insulating film (35) formed in each of the pixel regions on the first substrate (31).
A thin film transistor including a semiconductor layer (5), an ohmic contact layer, and source / drain electrodes (7, 9);
A protective film (37) formed on the entire first substrate (31) and a pixel electrode (13) disposed on the protective film (31) and connected to the drain electrode (9) are provided. .

On the second substrate (33), a light-shielding layer (25) for blocking light leaking from the gate wiring (1), the data wiring (3) and the thin film transistor, and formed on the light-shielding layer (25). The color filter layer (23), the common electrode (17) formed on the color filter layer, and the first substrate (3).
A liquid crystal layer formed between 1) and the second substrate (33) is provided.

In order to manufacture a multi-domain liquid crystal display device having such a structure, first, a gate electrode (11), a gate insulating film (35), a semiconductor layer ( 5) Form a thin film transistor comprising an ohmic contact layer and source / drain electrodes (7, 9). At this time, a plurality of gate lines (1) and data lines (3) for dividing the first substrate into a plurality of pixel regions are formed.

The gate electrode (11) and the gate wiring (1)
Is formed by laminating a metal such as Al, Mo, Cr, Ta or an Al alloy by a sputtering method and then patterning the same, and at the same time, forming a common auxiliary electrode (15) so as to surround the pixel region. A gate insulating film (35) is formed thereon by SiNx or
After laminating SiOx by a plasma CVD method (PECVD), it is formed by patterning. Next, the semiconductor layer (5) and the ohmic contact layer are formed by a-Si and n + a-Si, respectively, by plasma CV.
After lamination by the method D, it is formed by patterning. Other methods include a gate insulating film (35), a-Si and n + a-
Si is continuously deposited by plasma CVD and patterned. Then, after laminating a metal such as Al, Mo, Cr, Ta or an Al alloy by a sputtering method, the data wiring (3) and the source / drain electrodes (7, 9) are formed by patterning.

At this time, the storage electrode (43) is simultaneously formed so as to overlap the gate wiring (1) and / or the common auxiliary electrode (15). The storage electrode (43) plays a role of a storage capacitor together with the gate wiring (1) and / or the common auxiliary electrode (15).

Next, a protective film (37) made of a substance such as benzocyclobutene (BCB: BenzoCycloButene), an acrylic resin, a polyimide compound, SiNx or SiOx is formed on the entire first substrate (31), and the indium tin oxide (ITO) is formed. : Ind
A pixel electrode (13) is formed by laminating a metal such as ium tin oxide), Al or Cr by a sputtering method and then patterning. The pixel electrode (13) is connected to the drain electrode (9) and the storage electrode (43) through a contact hole (39).

When the common auxiliary electrode (15) is formed using the same material as the gate wiring (1), the common auxiliary electrode (15) is formed in the same layer as the gate wiring (1) using the same mask and It is electrically connected to (17). Alternatively, it can be made of another metal with an additional mask or in two different layers.

A light-shielding layer (25) is formed on the second substrate (33), and a color filter layer (23) is formed so that R, G, and B (Red, Green, Blue) elements are repeated for each pixel. I do.
After laminating a photosensitive substance on the color filter layer (23), it is patterned by photolithography to form a dielectric structure (53) in various shapes. Next, the common electrode (17) is formed of a transparent electrode such as ITO like the pixel electrode (13), and then liquid crystal is injected between the first substrate (31) and the second substrate (33). Thus, a multi-domain liquid crystal display device is completed.

The substance constituting the dielectric structure (53) preferably has a dielectric constant equal to or smaller than that of the liquid crystal layer, and is preferably 3 or less. , As an example, acrylic (photoacrylate)
Or a substance such as BCB.

In the method of applying the voltage (Vcom) to the common auxiliary electrode (15), an Ag-Dotting portion is formed at each corner of the driving area of the liquid crystal display element on the first substrate (31). Thus, an electric field is applied to the second substrate (33), and the liquid crystal is driven by the upper and lower potential differences. The voltage (V) is connected to the Ag dotting part of each corner and the common auxiliary electrode (15).
com), and the process is performed simultaneously with the formation of the common auxiliary electrode (15).

Further, a polymer is stretched on at least one of the first substrate (31) and the second substrate (33) to form a retardation film (29).

The retardation film (29) is a negative uniaxial film having a single optical axis composed of a uniaxial substance.
(negative uniaxial film), which plays a role of compensating a phase difference felt by a user from a direction perpendicular to the substrate and a direction due to a change in viewing angle. Therefore, the grayscale inversion (gray inve
rsion), and expand the contrast ratio from the tilt direction.
By increasing the (contrast ratio) and forming one pixel in a multi-domain, the viewing angle in the left-right direction can be more effectively compensated.

In the multi-domain liquid crystal display device of the present invention, in addition to the negative uniaxial film, a negative biaxial film is used as a retardation film.
lm). A negative biaxial film having an optical axis composed of two biaxial materials can obtain a wider viewing angle characteristic than the uniaxial film. Also, after attaching the retardation film,
A polarizer (not shown) may be attached to both substrates, and in this case, the polarizer may be formed integrally with the retardation film.

The multi-domain liquid crystal display element shown in FIG. 2 has a high aperture ratio by forming the pixel electrode (13) so as to overlap with the light shielding layer (25) and the common auxiliary electrode (15). I have. The storage electrode (43) overlaps with the gate wiring (1) to form a storage capacitor. The storage electrode (43) and the common auxiliary electrode (15) may be formed to overlap.

FIGS. 5 and 6 show an embodiment in which a dielectric structure (53) is formed on the common electrode (17). FIGS. 7 and 8 show an electric field induction in the common electrode (17). This is an embodiment in which a window (51) is formed. FIGS. 5 and 7 show embodiments in which the protective film (37) is formed from a material such as SiNx or SiOx. FIGS. 6 and 8 show BCB and acrylic resin.
(Acrylic resin) or a polyimide compound to form a flattened embodiment.

FIGS. 9 and 10 are plan views of a multi-domain liquid crystal display device according to a second embodiment of the present invention, and FIGS. 11 and 12 are cross-sectional views taken along line III-III 'of FIG. 13 to 16 are sectional views taken along line IV-IV 'in FIG.

In FIGS. 11 to 16, the pixel electrode (13) does not overlap with the common auxiliary electrode (15), and the light shielding layer (25) is formed so as to overlap with the pixel electrode (13). I have. At this time, the gate insulating film (35) and the protective film (37) formed on the common auxiliary electrode (15) are removed, and the common auxiliary electrode (15) applied to the pixel electrode (13) is removed. If the electric field is increased, the same effect can be obtained as when the common auxiliary electrode (15) and the pixel electrode (13) are on the same plane. FIG. 11 shows the gate insulating film (35) and the protective film (3) so that a part of the common auxiliary electrode (15) is exposed.
FIG. 12 shows a common auxiliary electrode (1).
5) is a structure that is completely exposed.

The storage electrode (43) is a gate wiring (1)
Overlaps with to form a storage capacitor. The storage electrode (43) may be formed to overlap the common auxiliary electrode (15).

FIGS. 13 and 14 show the common electrode (17).
15 and 16 show an embodiment in which an electric field induction window (51) is formed in the common electrode (17). 13 and 15 show embodiments in which the protective film (37) is formed from a material such as SiNx or SiOx, and FIGS.
B, an embodiment formed from an acrylic resin or a polyimide compound and flattened.

FIG. 17 is a plan view of a multi-domain liquid crystal display device according to a third embodiment of the present invention. FIG. 18 is a sectional view taken along line VV 'in FIG.
17 is a sectional view taken along line VI-VI 'in FIG.

The liquid crystal display device of these embodiments has a structure in which a pair of upper and lower pixel electrodes (13) and the like are formed on a common auxiliary electrode (15) sharing a storage electrode (43). The aperture ratio can be improved as compared with the liquid crystal display element shown in FIG. Further, the pixel electrode (13) is formed so as to overlap with the common auxiliary electrode (15), and the light-shielding layer (25)
Overlap with the common auxiliary electrode, and the storage electrode (43) forms a storage capacitor with the common auxiliary electrode (15).

FIGS. 19 and 20 show the common electrode (17).
21 and 22 show an embodiment in which a dielectric structure (53) is formed thereon, and FIGS. 21 and 22 show embodiments in which an electric field induction window (51) is formed in the common electrode (17). 19 and 21 show an embodiment in which a light-shielding layer (25) is formed on the gate / data wirings (1) and (3) and the thin-film transistor. FIGS. 20 and 22 show light-shielding only on the thin-film transistor. This is an embodiment in which a layer (25) is formed.

FIGS. 23 and 24 are plan views of a multi-domain liquid crystal display according to a fourth embodiment of the present invention.
FIGS. 25 and 26 are cross-sectional views taken along line VII-VII 'of FIG.

The liquid crystal display elements have the same configuration except for the following parts. The pixel electrode (13) does not overlap with the common auxiliary electrode (15), while the light-shielding layer (25) is formed so as to overlap with the pixel electrode (13). Here, by removing the gate insulating film and the protective film formed on the common auxiliary electrode (15) and increasing the electric field of the common auxiliary electrode (15) applied to the pixel electrode (13), The same effect can be obtained as when the common auxiliary electrode (15) and the pixel electrode (13) are on the same plane. FIG. 25 shows a structure in which the gate insulating film (35) and the protective film (37) are removed so that a part of the common auxiliary electrode is exposed. FIG. 26 shows a structure in which the common auxiliary electrode (15) is completely exposed. The structure is

FIG. 27 is a plan view of a multi-domain liquid crystal display device according to a fifth embodiment of the present invention, and FIG. 28 is a sectional view taken along line VIII-VIII 'of FIG. The fifth embodiment has a high aperture ratio thin film transistor structure,
The configuration other than the transistor is the same as that of the second embodiment of the present invention. The storage electrode (43) is also formed on the common auxiliary electrode (15), and the effect of expanding the storage capacitor can be obtained. The common auxiliary electrode (15) and the pixel electrode (1
3) is also possible.

FIG. 29 is a plan view of a multi-domain liquid crystal display device according to a sixth embodiment of the present invention. In the sixth embodiment, an L-shaped thin film transistor (L-lined T) having a high aperture ratio is used.
A hin film transistor is the same as the fourth embodiment of the present invention except for the transistor, and a structure in which the common auxiliary electrode (15) and the pixel electrode (13) overlap is also possible.

The L-shaped TFT has an effect of improving the aperture ratio by forming an L-shaped TFT on the gate wiring (1) as compared with the above-described other embodiments and the like. ) And the drain capacitance (9) can be reduced.

FIGS. 30 to 36 are views showing various electric field induction windows or dielectric structures according to an embodiment of the present invention. In the multi-domain liquid crystal display device of the present invention, a dielectric structure (53) may be formed on the pixel electrode and / or the common electrode, or the pixel electrode, the protective film, the gate insulating film, the color filter layer, and the overcoat layer may be formed. By patterning the common electrode and / or forming an electric field induction window (51) such as a hole or a slit therein, the effect of electric field distortion and multi-domain can be exhibited.

The electric field guiding window (51) or the dielectric structure (53) may be elongated in the horizontal direction, the vertical direction or both diagonal directions to obtain an effect of dividing into two domains,
The shape, the + shape, the diamond shape, the comb shape, the shape of the double Y (FIG. 36) and the × and + shapes are simultaneously patterned to exhibit the effect of dividing into four domains and multi-domains. Among the substrates, it is also possible to form them on at least one substrate, or to apply them independently or mixedly on both substrates.

Further, in the multi-domain liquid crystal display device of the present invention, an alignment film (not shown) is formed over the entire first substrate and / or the second substrate. Here, as the alignment material constituting the alignment film, a material such as a polyamide or polyimide compound, polyvinyl alcohol, polyamic acid, or SiO 2 is used. When the orientation direction is determined using a rubbing method, any substance can be used as long as it is a substance suitable for other rubbing treatments.

Further, the alignment film is made of a photoreactive substance,
That is, polyvinyl cinnamate (PVCN: polyvinylcinna
mate), polysiloxane cinnamate (PSCN: polysilox
anecinnamate) or cellulose cinnamate (CelCN: c
The photo-alignment film can also be formed from a material such as an ellulosecinnamate) compound, and any other material can be used as long as it is a material suitable for other photo-alignment treatments. The photo-alignment film is irradiated with light at least once, and a pretilt angle (pretilt angle) formed by a director of liquid crystal molecules is formed.
le) and an alignment direction or a pretilt direction are simultaneously determined, thereby ensuring alignment stability of the liquid crystal. The light used for such optical alignment is preferably light in the ultraviolet region, and any of unpolarized light, linearly polarized light, and partially polarized light may be used.

The rubbing method or the photo-alignment method may be applied to only one of the first substrate and the second substrate, or may be applied to both of these substrates. Alternatively, it is also possible to form only the alignment film and not perform the alignment treatment.

Further, by performing the alignment treatment,
By forming a multi-domain liquid crystal display element divided into at least two regions, liquid crystal molecules of a liquid crystal layer can be oriented in different directions on each region. That is, each pixel is divided into four regions such as a + shape or a × shape,
The multi-domain effect is exhibited by dividing the substrate in the horizontal direction, the vertical direction, or both diagonal directions, and forming the substrate in each region so that the alignment process or the alignment direction is different.
At least one of the divided regions may be a non-oriented region, or all regions may be non-oriented regions.

[0044]

According to the multi-domain liquid crystal display device of the present invention, a common auxiliary electrode is formed on the same layer as a gate wiring so as to surround a pixel region, and electric field distortion is induced. This has the effect of achieving an aperture ratio and improving the multi-domain effect. Further, since the common auxiliary electrode is in the same layer as the gate wiring, a short circuit between the pixel electrode and the common auxiliary electrode can be prevented, and the yield can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a conventional liquid crystal display device.

FIG. 2 is a plan view of the multi-domain liquid crystal display device according to the first embodiment of the present invention.

FIG. 3 is a plan view of the liquid crystal display device of FIG.

4 is a longitudinal sectional view of the liquid crystal display device of FIG.

5 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 6 is a longitudinal sectional view of the liquid crystal display device of FIG.

7 is a longitudinal sectional view of the liquid crystal display device of FIG.

8 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 9 is a plan view of a multi-domain liquid crystal display device according to a second embodiment of the present invention.

FIG. 10 is a plan view of the liquid crystal display device of FIG.

11 is a longitudinal sectional view of the liquid crystal display device of FIG.

12 is a longitudinal sectional view of the liquid crystal display device of FIG.

13 is a longitudinal sectional view of the liquid crystal display device of FIG.

14 is a longitudinal sectional view of the liquid crystal display device of FIG.

15 is a longitudinal sectional view of the liquid crystal display device of FIG.

16 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 17 is a plan view of a multi-domain liquid crystal display device according to a third embodiment of the present invention.

18 is a longitudinal sectional view of the liquid crystal display device of FIG.

19 is a longitudinal sectional view of the liquid crystal display device of FIG.

20 is a longitudinal sectional view of the liquid crystal display device of FIG.

21 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 22 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 23 is a plan view of a multi-domain liquid crystal display device according to a fourth embodiment of the present invention.

24 is a plan view of the liquid crystal display device of FIG.

25 is a longitudinal sectional view of the liquid crystal display device of FIG.

26 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 27 is a plan view of a multi-domain liquid crystal display device according to a fifth embodiment of the present invention.

28 is a longitudinal sectional view of the liquid crystal display device of FIG.

FIG. 29 is a plan view of a multi-domain liquid crystal display device according to a sixth embodiment of the present invention.

FIG. 30 is a view showing an electric field induction window or a dielectric structure according to a modification of the present invention.

FIG. 31 is a diagram showing another modified example, similarly to FIG. 30.

FIG. 32 is a diagram showing another modified example, similarly to FIG. 30.

FIG. 33 is a diagram showing another modified example, similarly to FIG. 30.

FIG. 34 is a diagram showing another modified example, similarly to FIG. 30.

FIG. 35 is a diagram showing another modified example, similarly to FIG. 30.

FIG. 36 is a diagram showing another modified example, similarly to FIG. 30.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 gate wiring 3 data wiring 5 semiconductor layer 7 source electrode 9 drain electrode 11 gate electrode 13 pixel electrode 15 common auxiliary electrode 17 common electrode 21 auxiliary electrode 23 color filter layer 25 light shielding layer 27 open area 29 phase difference film 31 first substrate 33 Second substrate 35 Gate insulating film 37 Protective film 39 Contact hole 43 Storage electrode 51 Electric field induction window (hole or slit) 53 Dielectric structure

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hyun Ho Shin Korea 876 Kum Jung-dong, Kyun-kido, Kumpo City, Korea 338-1504 Apartment, 338-1504 (72) Inventor Gyeong Jin Kim, Soksa-do, Sossa-dong, Soksa-do, Bukung, Korea Hansin apartment 108-1210 (72) Inventor Yun Bok-ri Korea Dongguk-do, Yangon, Donggan-gu Bukhun-dong (No address) Eunhas-Chunk apartment 107-1702 (72) Inventor Jom Jae Kim South Korea Seoul Dongdaemun 42 Dap Sipuri 4 Dong Dongdapu-Hanshin Apartment 2-913

Claims (31)

[Claims] 1. A first substrate and a second substrate which are opposed to each other, a liquid crystal layer formed between the first substrate and the second substrate, and a pixel region formed vertically and horizontally on the first substrate. A plurality of gate wirings and data wirings, a pixel electrode integrally formed in the pixel region, and a common auxiliary electrode formed in the same layer as the gate wiring and formed so as to surround the pixel region. A gate insulating film formed on the entire first substrate, a protective film formed on the entire first substrate on the gate insulating film, a light-shielding layer formed on the second substrate, A multi-domain liquid crystal display device comprising: a color filter layer formed on a substrate; a common electrode formed on the color filter layer; and an alignment film formed on at least one of the first substrate and the second substrate. . 2. The multi-domain liquid crystal display device according to claim 1, further comprising a storage electrode connected to the pixel electrode under the protection film and formed to overlap the gate line. . 3. The multi-domain liquid crystal display according to claim 1, further comprising a storage electrode connected to the pixel electrode under the protection film and formed to overlap the common auxiliary electrode. element. 4. The multi-domain liquid crystal display device according to claim 1, wherein said pixel electrode is formed so as to overlap with said common auxiliary electrode. 5. The multi-domain liquid crystal display device according to claim 4, wherein said light shielding layer is formed so as to overlap with said common auxiliary electrode. 6. The multi-domain liquid crystal display device according to claim 1, wherein the pixel electrode does not overlap with the common auxiliary electrode. 7. The multi-domain liquid crystal display device according to claim 6, wherein said light shielding layer overlaps with said pixel electrode. 8. The multi-domain liquid crystal display device according to claim 6, wherein said gate insulating film and said protective film are formed in a region other than said common auxiliary electrode. 9. The multi-domain liquid crystal display device according to claim 1, wherein the common auxiliary electrode is electrically connected to the common electrode. 10. The multi-domain liquid crystal display device according to claim 1, further comprising a dielectric structure for electric field distortion on the pixel electrode. 11. The multi-domain liquid crystal display device according to claim 1, further comprising a dielectric structure for electric field distortion on the common electrode. 12. The multi-domain liquid crystal display device according to claim 1, wherein said pixel electrode has an electric field induction window therein. 13. The multi-domain liquid crystal display device according to claim 1, wherein said protective film has an electric field induction window therein. 14. The multi-domain liquid crystal display device according to claim 1, wherein said gate insulating film has an electric field induction window therein. 15. The multi-domain liquid crystal display device according to claim 1, wherein said common electrode has an electric field induction window therein. 16. The multi-domain liquid crystal display device according to claim 1, wherein the color filter layer has an electric field induction window on a surface thereof. 17. The multi-domain liquid crystal display device according to claim 1, further comprising an overcoat layer on the color filter layer. 18. The multi-domain liquid crystal display device according to claim 17, wherein said overcoat layer has an electric field induction window therein. 19. The multi-domain liquid crystal display device according to claim 1, wherein the material constituting the protective film is selected from a group consisting of benzocyclobutene (BCB), an acrylic resin, and a polyimide compound. . 20. The multi-domain liquid crystal display device according to claim 1, wherein the material forming the protective film is selected from a group consisting of SiNx and SiOx. 21. A material forming the common auxiliary electrode,
Indium tin oxide (ITO), Al, Mo, C
2. The multi-domain liquid crystal display device according to claim 1, wherein the device is selected from the group consisting of r, Ta, Ti and an Al alloy. 22. The multi-domain liquid crystal display device according to claim 1, wherein the pixel region is divided into at least two regions, and liquid crystal molecules of the liquid crystal layer exhibit different driving characteristics on each region. . 23. The multi-domain liquid crystal display device according to claim 1, wherein the alignment film is divided into at least two regions, and liquid crystal molecules of the liquid crystal layer exhibit different alignment characteristics on each region. . 24. The multi-domain liquid crystal display device according to claim 23, wherein at least one of the regions of the alignment film is subjected to an alignment treatment. 25. The multi-domain liquid crystal display device according to claim 23, wherein no alignment treatment is performed on any of the regions of the alignment film. 26. The multi-domain liquid crystal display device according to claim 1, wherein the liquid crystal forming the liquid crystal layer is a liquid crystal having a positive or negative dielectric anisotropy. 27. The multi-domain liquid crystal display device according to claim 1, further comprising a negative uniaxial film formed on at least one of the first substrate and the second substrate. 28. The multi-domain liquid crystal display device according to claim 1, wherein a negative biaxial film is further formed on at least one of the first substrate and the second substrate. 29. The multi-domain liquid crystal display device according to claim 1, wherein the liquid crystal layer contains a chiral dopant. 30. A first substrate and a second substrate opposed to each other, a liquid crystal layer formed between the first substrate and the second substrate, and a pixel formed vertically and horizontally on the first substrate. A plurality of gate wirings and data wirings defining a region, a pixel electrode integrally formed in the pixel region, and a common electrode formed on the same layer as the gate wiring and surrounding the pixel electrode; A multi-domain liquid crystal display device comprising an auxiliary electrode. 31. A first substrate and a second substrate which are opposed to each other, a liquid crystal layer formed between the first substrate and the second substrate, and a pixel which is formed vertically and horizontally on the first substrate. A plurality of gate wirings and data wirings that define a region, an L-shaped thin film transistor (L-lined Thin Film Transistor) formed at the intersection of the gate power distribution and the data wiring, and are integrally formed in the pixel region. A pixel electrode, a common auxiliary electrode formed in the same layer as the gate wiring and surrounding the pixel region, a gate insulating film formed over the entire first substrate, and A protective film formed over the entire first substrate, a light-shielding layer formed on the second substrate, a color filter layer formed on the light-shielding layer, and a common electrode formed on the color filter layer. , The first substrate and Multi-domain liquid crystal display device consisting of an alignment film formed on at least one of the substrates of the second substrate.