JP2002014331A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device with a wide viewing angle by forming a plurality of domains in one pixel as a VA method liquid crystal display device. SOLUTION: A liquid crystal layer having negative dielectric anisotropy is held between a pair of substrates 1, 7, and pixel electrodes 4 are disposed on one substrate 1 while a color filter 9 and a common electrode are disposed on the other substrate 7. An inclined edge part 9b is formed in the edge part of the color filter 9 and the color filter 9 is formed in the position such that the edge part 9b faces the edge part 4a of the pixel electrode 4. When a voltage is applied on the pixel electrode 4, liquid crystal molecules 14 are tilted in the direction determined by the edge part 9b and thereby, a plurality of regions with different tilt directions of the liquid crystal molecules are formed in one pixel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device having a wide viewing angle.

[0002]

2. Description of the Related Art In general, liquid crystal display devices have characteristics of being thin and light and having low power consumption, and are widely used from portable terminals to large televisions. A twisted nematic (TN) type liquid crystal display device has been frequently used as this liquid crystal display device, and high performance and quality are maintained as the display device.

TN type TFT (ThinFilm Transistor)
In the case of a liquid crystal display device, a substrate on which a pixel electrode is formed and a substrate on which a common electrode is formed are arranged to face each other, and liquid crystal is sealed between the pair of substrates. An alignment process is performed on the alignment films on both substrates by rubbing or the like, and the alignment direction is set to be different from the alignment direction of the opposing substrates by 90 degrees. The liquid crystal molecules are regulated in this alignment direction and are horizontally arranged in that direction, and are arranged to be twisted by 90 degrees in the horizontal direction between the substrates. A polarizing plate is arranged outside the substrate so as to face the substrate.In the normally black mode, the polarizing plates are arranged so that the transmission axes of the two polarizing plates are in the same direction. The plates are arranged so that the transmission axis of the plate forms 90 degrees. The transmitted light that has passed through one of the polarizing plates passes through the liquid crystal layer as linearly polarized light. At this time, since the liquid crystal molecules are arranged by being twisted by 90 degrees, the transmitted light is turned and the polarization direction is twisted by 90 degrees. At this time, in the normally black mode, the transmitted light that has passed through the liquid crystal layer cannot pass through the other polarizing plate, so that a dark display is obtained. In the normally white mode, the transmitted light that has passed through the liquid crystal layer passes through the other polarizing plate. Since it can be done, the display is bright.

[0004] However, TN-type liquid crystal display devices and the like have problems such as large viewing angle dependence. Therefore, as a method capable of realizing a wide viewing angle, an IPS (In-Plane Switching) type liquid crystal display device in which an electric field applied to a liquid crystal layer is applied in a direction parallel to a substrate has been proposed. A comb-shaped pixel electrode and a comb-shaped common electrode are arranged on one of the pair of substrates sandwiching the liquid crystal layer. The alignment films on both substrates are subjected to alignment processing in the same direction as the direction of the comb-shaped electrodes, and when no voltage is applied to the electrodes, the liquid crystal molecules are horizontally aligned in the same direction as the alignment direction. A polarizing plate is arranged outside the substrate so as to face the substrate, the transmission axes of the two polarizing plates are 90 degrees, and the orientation directions of the substrates facing the transmission axis of the polarizing plate are the same or orthogonal. It is set as follows. The transmitted light that has passed through one of the polarizing plates passes through the liquid crystal layer as linearly polarized light. At this time, the transmitted light passes through the liquid crystal layer without rotating because the liquid crystal molecules are arranged horizontally without being twisted.
Therefore, the transmitted light is blocked by the other polarizing plate, so that a dark display is obtained. When a voltage is applied to the electrodes, a horizontal electric field is generated in the liquid crystal layer, and the liquid crystal molecules have a positive dielectric anisotropy, so that some of the liquid crystal molecules in the liquid crystal layer are twisted in the direction of the electric field. At this time, the transmitted light of the linearly polarized light that has passed through one of the polarizing plates is birefringent when passing through the liquid crystal layer to become the transmitted light of the elliptically polarized light, and passes through the other polarizing plate to provide a bright display.

[0005]

However, the IPS type liquid crystal display device has problems such as slow response and poor chromaticity. Therefore, there is a liquid crystal display device of a VA (vertically aligned) system as a system which has a quick response while maintaining a wide viewing angle. In this, liquid crystal having a negative dielectric anisotropy is sealed between a pair of substrates, and a pixel electrode is disposed on one substrate and a common electrode is disposed on the other substrate. The alignment films on both substrates are subjected to vertical alignment processing, and liquid crystal molecules are vertically aligned when no voltage is applied to the electrodes. Polarizing plates are arranged outside the substrates, and the transmission axes of the polarizing plates are set to be orthogonal. When no voltage is applied to the electrodes, the liquid crystal molecules between the substrates are vertically arranged, so that the linearly transmitted light passing through one polarizing plate passes through the liquid crystal layer as it is and is blocked by the other polarizing plate. Can be When a voltage is applied to the electrodes, the liquid crystal molecules between the substrates are aligned horizontally, so that the linearly transmitted light that has passed through one polarizer is birefringent when passing through the liquid crystal layer and becomes elliptically polarized light. Pass through the other polarizing plate.

In order to further improve the viewing angle of a VA liquid crystal display device, there is a method of forming a plurality of domains in one pixel. This embodiment is disclosed in Japanese Patent Application Laid-Open No. H11-242225.

Accordingly, an object of the present invention is to provide a liquid crystal display device having a wide viewing angle by forming a plurality of domains in one pixel.

[0008]

According to the first aspect of the present invention, there is provided a pixel electrode formed on a first substrate, a color filter formed on a second substrate, and a pixel electrode formed on a second substrate. Having a stacked common electrode, an alignment film that has been subjected to a vertical alignment process and is stacked on the first substrate and the second substrate, and the first substrate and the second substrate are arranged to face each other, and this pair of substrates In a liquid crystal display device in which liquid crystal having a negative dielectric anisotropy is enclosed between the color filters, the color filter has an inclined edge portion at a peripheral portion and the edge portion is formed so as to face the peripheral edge of the pixel electrode. It is characterized in that the tilt direction of liquid crystal molecules when an electric field is generated between the pixel electrode and the common electrode is regulated.

The invention according to claim 2 is characterized in that the pixel electrode is substantially rectangular.

The invention according to claim 3 is characterized in that a slit is formed in the center of the pixel electrode.

According to a fourth aspect of the present invention, in one pixel, a color filter is divided into a plurality of parts corresponding to pixel electrodes divided by slits.

According to a fifth aspect of the present invention, a light-shielding film is formed on the second substrate, and an edge portion of the color filter is located on the light-shielding film.

According to a sixth aspect of the present invention, there is provided a liquid crystal display device wherein a plurality of regions having different inclination directions of liquid crystal molecules can be formed in one pixel when an electric field is generated between the pixel electrode and the common electrode. A concave portion is formed near the boundary of the region.

The invention according to claim 7 is characterized in that the recess is formed at least in a portion farthest from the periphery of the pixel electrode.

The invention according to claim 8 has a first polarizing plate disposed outside the first substrate and a second polarizing plate disposed outside the second substrate. When viewed from the normal direction of the substrate, the transmission axis of the first polarizing plate is orthogonal to the transmission axis of the second polarizing plate, and the liquid crystal molecules tilted when an electric field is generated between the pixel electrode and the common electrode. The transmission axis is located in a direction that is not parallel to the long axis direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the relationship between a pixel electrode and a color filter, and FIG.
FIG. 2 is a schematic cross-sectional view taken along line A.

Reference numeral 1 denotes a first substrate such as a glass substrate, on which scanning lines 2 and signal lines 3 are arranged in a matrix. A region surrounded by the scanning line 2 and the signal line 3 corresponds to one pixel, and a pixel electrode 4 is arranged in this region, and a thin film transistor 5 (hereinafter referred to as a TFT) is formed at an intersection of the scanning line 2 and the signal line 3. Is done. The TFT 5 is formed by stacking a source electrode 5b and a drain electrode 5c extending from the signal line 3 on a gate electrode 5a extending from the scanning line 2. An insulating film 6 is laminated on the source electrode 5b and the drain electrode 5c, and the drain electrode 5c and the pixel electrode 4 are connected via a contact hole formed in the insulating film 6. The pixel electrode 4 has a substantially rectangular shape with a portion of the TFT 5 missing as shown in FIG. 1 when viewed from the normal direction of the first substrate 1.

Reference numeral 7 denotes a second substrate formed of a glass substrate or the like. On the second substrate 7, a lattice-shaped black matrix 8 is formed. The black matrix 8 is provided at a position corresponding to the scanning lines 2 and the signal lines 3 on the first substrate 1. Reference numeral 9 denotes a color filter provided for each pixel, which is arranged in the row direction in the order of R, G, and B. Figure 1
The dashed line indicates the peripheral edge 9a of the color filter 9, and the peripheral edge 9a of the color filter 9 overlaps with the black matrix 8 and corresponds to the vicinity of the contour of the pixel electrode 4. The black matrix 8 and the color filter 9 are covered with a common electrode 10 made of ITO or the like. When a voltage is applied to the pixel electrode 4, an electric field is generated between the pixel electrode 4 and the common electrode 10.

11 is an alignment film laminated on the first substrate 1,
Reference numeral 12 denotes an alignment film laminated on the second substrate 7, and the alignment films 11, 12 have been subjected to a vertical alignment process. A liquid crystal layer 13 having a negative dielectric anisotropy is interposed between the first substrate 1 and the second substrate 7, and due to the influence of the alignment films 11 and 12 when no voltage is applied to the pixel electrode 4 when no electric field is applied. The liquid crystal molecules 14 of the liquid crystal layer 13 are arranged in a direction perpendicular to the substrates 1 and 7.

The color filter 9 of the present invention is separated from the color filters 9 of the adjacent pixels, and the peripheral edge 9a of the color filter 9 has an inclined edge 9b. That is, each of the R / G / B color filters has an edge on each of the four sides on the outer periphery. As seen from the normal direction of the substrates 1 and 7 as shown in FIG.
And the peripheral portion 9 a of the color filter 9 is located slightly outside the pixel electrode 4. Thus, the edge 9b of the color filter 9 is arranged at a position facing the edge 4a of the pixel electrode 4. In this embodiment, the edge 4a of the pixel electrode 4 overlaps with the edge 9b when viewed from the normal direction of the substrates 1 and 7. However, this edge 9b is in contact with the edge 4a of the pixel electrode 4. It is sufficient that the edge portion 9b is located at a position substantially opposed to the edge portion 9b. .

FIG. 3 is a schematic cross-sectional view schematically showing the arrangement of the liquid crystal molecules 14 when no voltage is applied to the pixel electrode (when no electric field is applied). At this time, as shown in FIG. 3, the liquid crystal molecules 14 between the pixel electrode 4 and the color filter 9
Although the liquid crystal molecules 14a and 14c near the edge 9b of the color filter 9 are arranged almost perpendicular to the edge 9b, the liquid crystal molecules 14a and 14c are inclined with respect to the second substrate 7 under the influence of 1 and 12. Arrange by state. This liquid crystal layer 13
Is not affected by the birefringence of the vertically arranged liquid crystal molecules 14, the first polarizing plate 15 located outside the first substrate 1 and the second polarizing plate located outside the second substrate 7. If the polarizing plates 16 are arranged so that their transmission axes are orthogonal to each other, the transmitted light passing through the first polarizing plate 15
And the display becomes black. The transmitted light may be slightly birefringent by the liquid crystal molecules 14a and 14c near the edge 9b. However, the transmitted light is blocked by the black matrix 8 because the edge 9b overlaps the black matrix 8.

FIG. 4 is a schematic cross-sectional view schematically showing an arrangement state of the liquid crystal molecules 14 when a voltage is applied to the pixel electrode 4 (when an electric field is applied). When a voltage is applied to the pixel electrode 4, an electric field is generated between the pixel electrode 4 and the common electrode 10, and the vertically arranged liquid crystal molecules 14 are inclined in the horizontal direction. At this time, between the edge 4a of the pixel electrode 4 and the edge 9b of the color filter 9, the direction of the normal to the substrates 1 and 7 is affected by the inclination of the edge 9b and the like, as shown by the dotted lines in FIGS. , An arc-shaped electric field is generated. Since the liquid crystal molecules 14a and 14c are arranged inclined when there is no electric field, the liquid crystal molecules 14a and 14c fall in the inclined direction when an electric field is applied. The liquid crystal molecules 14b and 14d located inside the edge portion 9b can be tilted in various directions because the alignment film 12 has not been subjected to the horizontal alignment process. However, the liquid crystal molecules 14a and 14d are affected by the liquid crystal molecules 14a and 14c.
Incline in the same direction as c. That is, the liquid crystal molecules 14b close to the liquid crystal molecules 14a are inclined in the same direction as the liquid crystal molecules 14a,
The liquid crystal molecules 14d close to the liquid crystal molecules 14c are the liquid crystal molecules 14c.
Tilt in the same direction as. On the other hand, near the edge 4a of the pixel electrode 4, electric lines of force are generated outward from the edge 4a of the pixel electrode 4, as shown by the dotted line in FIG. Therefore, the liquid crystal molecules 14e and 14f located near the edge 4a of the pixel electrode 4 are inclined so as to be perpendicular to the lines of electric force, and the liquid crystal molecules 14g and 14h located inside the pixel electrode 4 side are liquid crystal molecules. They fall in the same direction under the influence of 14e and 14f. Thus, the edge 4a of the pixel electrode 4 and the color filter 9
When the liquid crystal molecules 14 in the vicinity of the edge portion 9b are tilted in a predetermined direction, the tilt direction sequentially affects the adjacent liquid crystal molecules 14 and the liquid crystal molecules 14 are arranged as shown in FIG.

Since the color filter 9 has edges having different inclination directions, a plurality of regions where the inclination directions of the liquid crystal molecules 14 are different exist in one pixel. FIG. 5 is a diagram schematically showing the tilt state of the liquid crystal molecules 14 in one pixel. FIG.
For simplicity, the pixel electrode 4 and the color filter 9 are represented by rectangles. FIG. 4 is a schematic cross-sectional view taken along the line AA in FIG. 5, and the dashed line in FIG.
Reference numeral 4 denotes a boundary of a region inclined in the same direction.
The arrow in FIG. 5 indicates the direction in which the liquid crystal molecules 14 are inclined. The direction of the arrow is from the end closer to the pixel electrode 4 to the end closer to the color filter 9 when viewing one tilted liquid crystal molecule 14 shown in FIG. Indicates the direction to the part.

One pixel is divided into four regions A1 to A4. The inclination directions of the liquid crystal molecules 14 in the regions A1 and A3 are opposite, and the inclination directions of the liquid crystal molecules 14 in the regions A2 and A4 are opposite. Therefore, the liquid crystal molecules 14 in the regions A1 and A3
Compensate for each other's viewing angle characteristics, and the liquid crystal molecules 14 in the regions A2 and A4 compensate for each other's viewing angle characteristics, so that a liquid crystal display device with small viewing angle dependence can be realized. When the first polarizing plate 15 and the second polarizing plate 16 are arranged, their transmission axes are set to be orthogonal to each other, but this transmission axis is about 45 degrees with respect to the tilt direction of the liquid crystal molecules 14 when an electric field is applied. The direction has been adjusted. The transmission axis is indicated by an arrow beside the pixel electrode 4 in FIG. The transmitted light of the linearly polarized light that has passed through the first polarizing plate 15 is birefringent by the liquid crystal layer 13, becomes elliptically polarized light, and passes through the second polarizing plate 16. At this time, the liquid crystal display device displays white.

When the color filter 9 is rectangular, the size of each of the areas A1 to A4 is not uniform as shown in FIG. 5, so that the boundary between the area A1 and the area A3 is considerably longer than the other boundaries. Therefore, a disclination line easily occurs at the boundary between the area A1 and the area A3. Further, since the ratio of the regions A1 and A3 in one pixel is large, the viewing angle can be considerably improved by the regions A1 and A3, but the improvement of the viewing angle by the regions A2 and A4 cannot be expected much. Therefore, balanced viewing angle characteristics are not improved for the entire pixel. Therefore, a second embodiment will be described in which a disclination line is hardly generated, and the balanced viewing angle characteristics can be expected to be improved as a whole pixel. FIG.
FIG. 5 is a diagram schematically showing the tilt state of the liquid crystal molecules 14 in one pixel of the second embodiment, and corresponds to FIG. 5 of the first embodiment.

In the second embodiment, the shapes of the pixel electrode 20 and the color filter 21 are different from those of the first embodiment.
This is the same as the embodiment. The pixel electrode 20 has a slit 22 formed in a central portion, and has two electrode portions 20A and 20B.
It is divided into. In consideration of the influence of the alignment state on the liquid crystal molecules 14 near the edge of the pixel electrode 20, it is preferable to completely divide the pixel electrode 20 into two parts.
When only 5 are provided, the two electrode portions 20A and 20B
Are connected by a contact portion 20C. The color filters 21A and 21B have two electrode portions 20A and 20B.
The color filter 21 is formed so that the periphery of the color filter 21 is located slightly outside the pixel electrode 20 that faces each other. Thus, the color filter 21 and the pixel electrode 20 are arranged such that the edge of the color filter 21 and the edge of the pixel electrode 20 face each other.

At the time of the electric field, the liquid crystal molecules 14 are influenced by the liquid crystal molecules 14 near the edge of the color filter 21, and the liquid crystal molecules 14 are tilted as shown by arrows in FIG. At this time, two electrode portions 2
0A and 20B are both divided into four areas B1 to B4,
The region B1 and the region B3 compensate for the viewing angle characteristics, and the region B2
And the region B4 compensate the viewing angle characteristics. In the case of the second embodiment, the pixel electrodes 20 are divided into two, so that the sizes and boundaries of the regions B1 to B4 are equal to those of the first embodiment, and the discrimination when viewed by one pixel. The nation lines are equalized and become inconspicuous, and the viewing angles from all directions are improved in a well-balanced manner.

Next, a third embodiment will be described with reference to FIG. FIG. 7 is a diagram schematically showing an inclined state of the liquid crystal molecules 14 in one pixel of the third embodiment.
It corresponds to.

In the pixel electrode 23 of the third embodiment, a recess 24 is formed at a position corresponding to the boundary between the regions A1 to A4 in the first embodiment shown in FIG. The recess 24 functions not as an opening of the pixel electrode 23 but as the pixel electrode 23. In the third embodiment, the shape of the pixel electrode 23 is different, but the other configuration is the same as that of the first embodiment. The arrow in FIG. 7 indicates the tilt direction of the liquid crystal molecules 14 located near the pixel electrode 23. When an electric field is applied, the liquid crystal molecules 14 near the edge 23a of the pixel electrode 23 are oriented in a direction perpendicular to the edge 23a as in the first embodiment, but the liquid crystal molecules 14 near the recess 24 are perpendicular to the recess 23. In the right direction. The force of regulating the direction of the liquid crystal molecules 14 by the concave portions 24 of the pixel electrode 23 is not so strong, and since there is no concave portion on the color filter 9 side, the liquid crystal molecules 14 near the color filter 9 are arranged in the same manner as in the first embodiment. State. In the case of the first embodiment, the regulating force in the direction of inclination of the liquid crystal molecules 14 by the edge 4a of the pixel electrode 4 and the edge 9b of the color filter 9 at the boundary between the regions A1 to A4 is weakened. 14 are easily disturbed, and disclination is likely to occur in a wide range. In the third embodiment, the concave portion 24 is formed in the pixel electrode 23 so that the liquid crystal molecules 1 located near the boundary between the regions C1 to C4 are formed.
4 can be arranged, and the disturbance of the arrangement state can be reduced.

Next, a fourth embodiment will be described with reference to FIG. FIG. 8 is a diagram schematically showing an inclined state of the liquid crystal molecules 14 in one pixel of the fourth embodiment, and FIG.
It corresponds to.

In the pixel electrode 25 of the fourth embodiment, a concave portion 26 is formed at a position corresponding to the boundary between the regions B1 to B4 in the second embodiment shown in FIG. The concave portion 26 has the same configuration as that of the third embodiment, and functions as the pixel electrode 25. In the fourth embodiment, the shape of the pixel electrode 25 is different, but the other configuration is the same as that of the second embodiment. The arrow in FIG. 8 also indicates the tilt direction of the liquid crystal molecules 14 located near the pixel electrode 25, similarly to the arrow in FIG. 7, and the liquid crystal molecules on the color filter 9 side are arranged in the same manner as in the second embodiment. When an electric field is applied, the liquid crystal molecules 14 near the edge 25a of the pixel electrode 25 are oriented in a direction perpendicular to the edge 25a as in the second embodiment, but the liquid crystal molecules 14 near the recess 26 are perpendicular to the recess 26. In the right direction. Therefore, in the fourth embodiment, by forming the concave portion 26 in the pixel electrode 25, the arrangement state of the liquid crystal molecules 14 located near the boundary between the regions D1 to D4 can be adjusted,
Disorder of the arrangement state can be reduced.

[0032]

According to the present invention, the inclination direction of the liquid crystal molecules is regulated by the edge portion of the color filter, and when an electric field is generated between the electrodes, a plurality of regions having different inclination directions of the liquid crystal molecules are formed in one pixel. Since the liquid crystal molecules can be generated, the liquid crystal molecules in each region compensate for each other's viewing angle characteristics, and a liquid crystal display device having excellent viewing angle characteristics can be realized.

Further, since the edge portion of the color filter is used as a means for regulating the tilt direction of the liquid crystal molecules, there is no need to provide a special projection or the like, and the conventional manufacturing process can be used only by changing the mask pattern. it can.

[Brief description of the drawings]

FIG. 1 is a plan view showing a relationship between a pixel electrode and a color filter of a liquid crystal display device according to one embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line AA of FIG.

FIG. 3 is a schematic cross-sectional view schematically showing an alignment state of liquid crystal molecules when no electric field is applied.

FIG. 4 is a schematic cross-sectional view schematically showing an alignment state of liquid crystal molecules under an electric field.

FIG. 5 is a diagram schematically showing an inclined state of liquid crystal molecules in one pixel.

FIG. 6 illustrates a liquid crystal display device according to a second embodiment of the present invention.
FIG. 3 is a diagram schematically illustrating a tilt state of liquid crystal molecules in a pixel.

FIG. 7 illustrates a liquid crystal display device according to a third embodiment of the present invention.
FIG. 3 is a diagram schematically illustrating a tilt state of liquid crystal molecules in a pixel.

FIG. 8 shows a liquid crystal display device according to a fourth embodiment of the present invention.
FIG. 3 is a diagram schematically illustrating a tilt state of liquid crystal molecules in a pixel.

[Explanation of symbols]

 Reference Signs List 1 first substrate 4 pixel electrode 7 second substrate 9 color filter 9a edge 10 common electrode 11 alignment film 12 alignment film 13 liquid crystal layer 14 liquid crystal molecules

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Kase 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Inside Sanyo Electric Co., Ltd. (72) Inventor Yoshitaka Mori 3-201 Minamiyoshikata, Tottori City, Tottori Sanyo Tottori Inside Electric Co., Ltd. (72) Inventor Shinichiro Tanaka 3-201 Minamiyoshikata, Tottori City, Tottori Pref. GA06 GA13 HA06 LA12 LA13 LA19 2H092 GA13 JB05 JB11 NA01 NA25 NA27 PA08 PA09 QA06 QA18

Claims (8)

[Claims] 1. A pixel electrode formed on a first substrate, a color filter formed on a second substrate, a common electrode stacked on the color filter, and a pixel electrode formed on the first substrate and the second substrate. Having an alignment film subjected to a stacked vertical alignment treatment, the first substrate and the second substrate are disposed to face each other,
In a liquid crystal display device in which liquid crystal having a negative dielectric anisotropy is sealed between the pair of substrates, the color filter has an inclined edge portion at a peripheral portion, and the edge portion faces the peripheral edge of the pixel electrode. Wherein the edge portion regulates the tilt direction of liquid crystal molecules when an electric field is generated between the pixel electrode and the common electrode. 2. The liquid crystal display device according to claim 1, wherein said pixel electrode is substantially rectangular. 3. The liquid crystal display device according to claim 1, wherein a slit is formed at a central portion of the pixel electrode. 4. The liquid crystal display device according to claim 3, wherein a color filter is divided into a plurality in one pixel corresponding to the pixel electrode divided by the slit. 5. The liquid crystal display device according to claim 1, wherein a light-shielding film is formed on the second substrate, and an edge of the color filter is located on the light-shielding film. 6. A liquid crystal display device in which a plurality of regions having different inclination directions of liquid crystal molecules can be formed in one pixel when an electric field is generated between the pixel electrode and the common electrode, wherein the pixel electrode has a boundary between the regions. 6. The liquid crystal display device according to claim 1, wherein a concave portion is formed in the vicinity. 7. The liquid crystal display device according to claim 6, wherein the concave portion is formed at least at a portion farthest from a peripheral edge of the pixel electrode. 8. A first polarizing plate disposed outside the first substrate and a second polarizing plate disposed outside the second substrate, wherein the first polarizing plate is normal to the substrate. The transmission axis of the first polarizer is orthogonal to the transmission axis of the second polarizer when viewed from the direction, and the length of the liquid crystal molecules tilted when an electric field is generated between the pixel electrode and the common electrode. 8. The liquid crystal display device according to claim 1, wherein the transmission axis is arranged in a direction that is not parallel to the axial direction.