JP2010128045A - Color filter and liquid crystal display device with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter capable of increasing light transmissivity even with a conventional BM pattern in a VA type liquid crystal display device, and to provide the VA type liquid crystal display device which has higher luminance when a panel is assembled and also has superior display characteristics free of disorder of liquid crystal alignment. <P>SOLUTION: The color filter for liquid crystal display device is used for the liquid crystal device having a liquid crystal layer, made of liquid crystal with negative anisotropy vertically aligned in an initial alignment state wherein no electric field is applied, between a first substrate having a transmission portion comprising a plurality of pixel electrodes and a second substrate having a common electrode opposed to the plurality of pixel electrodes, and has multi-colored pixel opening portions at respective positions defined by a BM as the second substrate, the common electrode being provided with a plurality of slits as an alignment restriction means for restricting alignment of the liquid crystal. The slits are formed straddling the BM and colored pixel opening portions. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a color filter and a liquid crystal display device including the color filter, and more particularly to a color filter and a liquid crystal display device suitable for a VA (Vertically Aligned) liquid crystal display device.

  In general, a liquid crystal display device has features such as thin and light weight and low power consumption. In particular, a TFT (Thin Film Transistor) type liquid crystal display device is used not only as a monitor for a personal computer but also as a normal color television. There is an increasing demand for a wide variety of applications, such as applications, mobile applications such as mobile phones, and in-vehicle applications. As a liquid crystal display panel used in this liquid crystal display device, a VA (Vertically Aligned) liquid crystal display panel is widely known as a liquid crystal display system that has a wide response angle and a quick response.

  FIG. 1 is a conceptual diagram illustrating a TN (Twisted Nematic) method, a VA method, and an IPS (In-Plane Switching) method, which are currently widely used, among liquid crystal driving methods. Among them, a VA liquid crystal display panel is formed with a TFT array substrate as a first substrate on which a transmission portion made of a plurality of ITO pixel electrodes, for example, is formed, and a common electrode facing the plurality of pixel electrodes. A liquid crystal having a negative dielectric anisotropy in which an initial alignment state in which an electric field is not applied exhibits a vertical alignment is enclosed between the second color filter substrate and the second color filter substrate.

  An alignment film is provided on the electrode layers of both substrates, both of which are subjected to a vertical alignment treatment, and when no electric field is applied to the electrodes, the liquid crystal molecules are aligned vertically. Moreover, the polarizing plate which contains a phase difference film in the structure is crossed Nicol arrangement | positioning on the outer side of both board | substrates. When no electric field is applied between the pixel electrode and the common electrode, the liquid crystal molecules between the substrates are aligned vertically, so that the linearly polarized light passing through one polarizing plate passes through the liquid crystal layer as it is. The other polarizing plate blocks the dark state, that is, black display. Also, when an electric field is applied between the pixel electrode and the common electrode, the liquid crystal molecules between the substrates are aligned horizontally, so that the linearly polarized transmitted light that has passed through one polarizing plate passes through the liquid crystal layer. It is birefringent to become elliptically polarized light, passes through the other polarizing plate, and is in a bright state, that is, white display.

  Here, the color filter as the second substrate generally includes a transparent substrate as a structural support, and a polarizing film is laminated on the screen observer side. The opposite side (back side) is divided into a large number of pixel regions. A black matrix in which a black color material is dispersed in an organic resin is provided at a portion between pixels located at the boundary between the pixel region and a colored pixel is disposed in each pixel region. The black matrix is disposed between the colored pixels for the purpose of improving contrast. The colored pixels color the transmitted light for each pixel, and generally, three colored pixels of red (R), green (G), and blue (B) corresponding to the three primary colors of light are arranged. Note that the black matrix prevents color mixing of transmitted light colored in these colors.

  By the way, in the VA method that has been widely used in the past, all liquid crystal molecules are aligned in a vertically standing state on the alignment film when no electric field is applied, but when an electric field is applied, Since the direction in which the liquid crystal molecules tilt in the horizontal direction cannot be controlled, the liquid crystal molecules are tilted randomly and arranged in the horizontal direction as they are, so that display unevenness is noticeable, or the alignment of the liquid crystal molecules is disturbed in the periphery of each pixel There is a problem that defects (disclinations) occur.

In order to control the direction in which liquid crystal molecules that are standing vertically fall down when an electric field is applied between the electrodes to achieve a uniform display state, the liquid crystal molecules are not completely vertical when no electric field is applied between the electrodes. In addition, it is necessary to stand at a slight angle from the vertical axis, that is, the pretilt angle, and the distribution state in the direction of the tilt needs to be substantially equal for each pixel.

  Therefore, in order to improve the viewing angle of the above-described VA liquid crystal display device, Patent Document 1 includes a linear protrusion structure, an auxiliary protrusion structure, or a recessed depression / slit in each pixel of each substrate. An MVA (Multi-domain Vertically Aligned) method in which a plurality of domain regulating means for regulating the alignment direction of liquid crystal is formed in one pixel has been proposed. However, in the conventional MVA liquid crystal display device, it is difficult to make the tilted state of the liquid crystal molecules ideal, and an optimal display state cannot be obtained. In particular, in the peripheral portion of the pixel electrode, when the liquid crystal molecules are inclined, not only the protrusions and slits but also the edge portion of the pixel electrode are affected, so that display unevenness is likely to occur.

  In addition, as another technique for improving the above-described problem of the VA method, Patent Document 2 discloses that a high contrast can be obtained over a wide viewing angle by providing an opening in the transparent conductive film of the pixel portion of the common electrode. A liquid crystal display device having a relatively high luminance is disclosed (hereinafter, this method is abbreviated as a slit). In this slit method, a part of the one-side electrode is removed by etching to form a slit. In the slit part, the lines of electric force from the counter electrode are not perpendicular but are distorted in an oblique direction and have an angle with respect to the axial direction of the liquid crystal molecules aligned perpendicular to the substrate. The direction of falling is divided. Thereby, the problems of high viewing angle, response speed, and aperture ratio are improved by patterning the common electrode of the pixel portion. As a material for forming the transparent conductive film, mixed oxides such as indium oxide, tin oxide, zinc oxide, antimony oxide, and gallium oxide are used.

In the VA system that has been widely used in the past, there is a strong demand for improvement because the response speed for viewing TV on a mobile phone is inferior compared to the IPS system. Furthermore, power consumption tends to increase due to multi-functionalization, and in order to reduce power consumption, it is necessary to maximize the aperture ratio of the panel. The problem with the conventional color filter is that the light transmittance is as low as about 25%. In order to increase the light transmittance, the line width of the black matrix is reduced to form a pattern with an increased aperture ratio. However, there is a limit in terms of preventing color mixing, preventing light leakage, and improving contrast.
Japanese Patent Laid-Open No. 11-242225 Japanese Patent No. 2565639

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a color filter capable of increasing light transmittance even with a conventional black matrix (BM) pattern in a VA liquid crystal display device. Yes. It is another object of the present invention to provide a VA liquid crystal display device that has a good display characteristic that increases the brightness when a panel is assembled and does not disturb the alignment of liquid crystal.

According to a first aspect of the present invention, there is provided a first substrate on which a transmissive portion including a plurality of pixel electrodes is formed, and a second substrate on which a common electrode facing the plurality of pixel electrodes is formed. In the liquid crystal display device having a liquid crystal layer made of a liquid crystal having negative dielectric anisotropy in which the initial alignment state in which no electric field is applied exhibits vertical alignment, a black matrix ( In the color filter having colored pixel openings that are multi-colored at respective positions partitioned by (BM), and having a plurality of slits in the common electrode as alignment regulating means for regulating the alignment of the liquid crystal, The color filter is characterized in that a slit extends over the BM and the colored pixel opening.

  According to a second aspect of the present invention, there is provided a first substrate on which a transmissive portion including a plurality of pixel electrodes is formed, and a second substrate on which a common electrode facing the plurality of pixel electrodes is formed. Used in a liquid crystal display device including a liquid crystal layer made of a liquid crystal having negative dielectric anisotropy in which an initial alignment state in which an electric field is not applied is vertical alignment between the substrate and a black matrix as the second substrate In a color filter having a multi-colored colored pixel opening at each position partitioned by (BM) and having a plurality of slits in a common electrode as an alignment regulating means for regulating the alignment of liquid crystal, In the color filter, the slit is disposed on the BM.

  Next, according to a third aspect of the present invention, there is provided a first substrate on which a transmissive portion including a plurality of pixel electrodes is formed, and a second substrate on which a common electrode facing the plurality of pixel electrodes is formed. Used as a liquid crystal display device having a liquid crystal layer made of a liquid crystal having a negative dielectric anisotropy in which an initial alignment state in which no electric field is applied is vertical. In color filters that have multi-colored colored pixel openings at each position partitioned by a matrix (BM) and have a plurality of slits in a common electrode as an alignment regulating means for regulating the alignment of liquid crystals The color filter is characterized in that the slit is arranged in a patterned state on the BM.

  According to a fourth aspect of the present invention, there is provided a first substrate on which a transmissive portion including a plurality of pixel electrodes is formed, and a second substrate on which a common electrode facing the plurality of pixel electrodes is formed. Used in a liquid crystal display device including a liquid crystal layer made of a liquid crystal having negative dielectric anisotropy in which an initial alignment state in which an electric field is not applied is vertical alignment between the substrate and a black matrix as the second substrate In a color filter having a multi-colored colored pixel opening at each position partitioned by (BM) and having a plurality of slits in a common electrode as an alignment regulating means for regulating the alignment of liquid crystal, The color filter is characterized in that the slit is stretched over the BM and patterned in the colored pixel opening.

  Next, the invention according to claim 5 of the present invention is the color filter according to any one of claims 1 to 4, wherein the slits are on four sides of the BM surrounding the colored pixel opening. And spacers for holding a holding interval (cell gap) between the first substrate and the second substrate are arranged at 1 to 4 locations at four corners of the BM intersection. It is a color filter.

  Next, an invention according to claim 6 of the present invention is a liquid crystal display device comprising the color filter according to any one of claims 1 to 5.

  According to a seventh aspect of the present invention, there is provided an oblique slit having a pattern perpendicular to the BM side of the second substrate at an inclination of 45 degrees at the pixel central portion of the pixel electrode of the first substrate. The liquid crystal display device according to claim 6, further comprising:

  The color filter of the present invention can direct the light cut by the BM so far toward the opening by arranging the slit on the BM. Even if the color filter has the conventional BM pattern, As a result, it is possible to increase the light transmittance. Thus, according to the present invention, a VA liquid crystal display device with high luminance can be provided.

  The color filter and liquid crystal display device of the present invention will be described in detail below based on an embodiment.

  FIG. 2 is a schematic cross-sectional view of an example of a transmissive liquid crystal display device according to the present invention. (A) is an overall configuration, and (b) is an enlarged view. In FIG. 2, a transmissive liquid crystal display device 7 includes a first substrate 10 and a second substrate 20 which are a pair of transparent substrates arranged to be spaced apart from each other, and a liquid crystal (LC) is interposed between them. 40 is enclosed.

  On the inner surface of the first substrate 10, scanning lines 13 and signal lines 14 are wired in a matrix form on a transparent substrate 11 made of glass or the like as a TFT array 16 via a gate insulating film 12. In FIG. 2B, the scanning line 13 is not shown because it is parallel to the cross section. A region surrounded by the scanning line 13 and the signal line 14 corresponds to one pixel, and a pixel electrode 15 made of a transparent conductive material such as ITO is disposed in this region, and at the intersection of the scanning line 13 and the signal line 14. A TFT (not shown) that is a switching element connected to the pixel electrode 15 is formed. An alignment film 17 is provided so as to cover the pixel electrode 15, and the alignment film 17 is subjected to a vertical alignment process. A polarizing plate 18 including a retardation film is formed on the outer surface of the first transparent substrate 10.

  On the other hand, the color filter of the present invention is formed on the transparent substrate 21 such as glass on the inner surface of the second substrate 20. A BM 22 is formed so as to divide each pixel, and a colored pixel opening 23 of any one of red (R), green (G), and blue (B) constituting the color filter is arranged corresponding to each pixel. ing. An overcoat layer 24 (not shown) as a transparent protective film is formed as needed so as to cover the BM 22 and the colored pixel opening 23, and a common electrode 25 made of a transparent electrode such as ITO is further formed thereon. It is formed. A slit 26 having a predetermined pattern is formed in the common electrode 25, an alignment film 27 is provided to cover the common electrode 25 and the slit 26, and the alignment film 27 is subjected to a vertical alignment process. A polarizing plate 28 is formed on the outer surface of the second substrate 20. Note that a backlight unit 19 including a three-wavelength lamp 50 is provided below the polarizing plate 18.

  The slits can be formed by a known method. For example, a positive resist can be applied to the surface of ITO, exposed through a photomask having a desired pattern, and developed by a wet process. It can also be created by patterning by a dry method using, for example, an excimer laser beam having an ultraviolet wavelength that does not damage the organic material layer under the ITO film.

  A liquid crystal 40 having a negative dielectric anisotropy is interposed between the first substrate 10 and the second substrate 20. When no electric field is generated between the pixel electrode 15 and the common electrode 25, the liquid crystal molecules 41 are vertically aligned by being regulated by the alignment films 17 and 27, and an electric field is generated between the pixel electrode 15 and the common electrode 25. When the liquid crystal molecules are tilted horizontally. At this time, the liquid crystal molecules 41 on the slit 26 are regulated by the ITO 26 and tilted in a predetermined direction.

  As described above, the polarizing plates 18 and 28 are disposed on the outer side of the first substrate 10 and the outer side of the second substrate 20, respectively, and the respective polarizing plates are set so that their transmission axes are orthogonal to each other. ing. When no electric field is generated between the pixel electrode 15 and the common electrode 25, the liquid crystal molecules are vertically aligned, so that the linearly polarized transmitted light that has passed through the polarizing plate 18 passes through the liquid crystal layer 40 as linearly polarized light. It is blocked by the polarizing plate 28 and becomes black. In addition, when a predetermined voltage is applied to the pixel electrode 15 and an electric field is generated between the pixel electrode 15 and the common electrode 25, liquid crystal molecules are inclined in the horizontal direction, so that linearly polarized light transmitted through the polarizing plate 18 is transmitted. Light becomes elliptically polarized light in the liquid crystal layer 40, passes through the polarizing plate 28, and becomes white display.

  FIG. 3 is a schematic plan view showing the pixel portion of an example of the color filter of the present invention in a transparent manner. In FIG. 3A, a BM 22 for dividing each pixel is formed, and a colored pixel opening 23 of any one of red (R), green (G), and blue (B) is arranged corresponding to each pixel. FIG. 3B shows an example of the arrangement of the slits 26. The slit 26 is desirably formed on the BM 22 so as to be point-symmetrical or line symmetric from the center of the colored pixel opening 23 so as to surround the colored pixel opening 23, but at the center of the two sides of the parallel BM. May be. By aligning the slit length vertically and horizontally, the liquid crystal molecules are arranged symmetrically, and the alignment direction of the liquid crystal molecules is spread over 360 degrees, so that a uniform field of view can be enlarged. That is, a liquid crystal display device that is bright and has little display unevenness and brightness unevenness can be obtained even with the conventional BM pattern design.

  FIG. 4A illustrates the state of the electric lines of force 5 when a slit is provided on the BM. A hole is formed in the ITO of the common electrode 25 on the BM 22 by etching or the like. By tilting, the light that has been cut by the BM 22 so far can be directed toward the colored pixel opening 23. As disclosed in the above-mentioned Patent Document 2 and the like, it has been reported in the prior art that, as shown in FIG. 4B, an ITO etching hole diameter of 10 μm forms a sufficient angle for alignment of liquid crystals. Yes. For example, by forming a slit with a width of 10 μm on the BM adjacent to the colored pixel opening, light that has been cut at 5 μm on one side of the BM is guided to the colored pixel opening. That is, by forming the slit on the BM, as shown in FIG. 4C, the liquid crystal molecules 41 are tilted by being regulated by the slit (not shown) on the BM 22, and the light is directed toward the colored pixel opening 23. This increases the viewing angle and increases the brightness when the panel is assembled.

  FIG. 5 is an enlarged cross-sectional view of the periphery of the BM along the line XX ′ in FIG. 3A. FIG. 5A is a diagram in which a slit 26 (not shown) is laid across the BM 22 and the colored pixel opening 23. (B) is a color filter designed with a slit arranged on the BM, (c) is a color filter designed with a slit patterned on the BM, ( d) shows a color filter having a design in which a slit is patterned in the BM and the colored pixel opening.

  FIG. 6 shows an example of a color filter in which slits 26 are arranged on four sides of the BM 22 surrounding the colored pixel opening 23 and spacers 30 for holding cell gaps are arranged at the four corners of the BM intersection. It is the schematic plan view to which the pixel part of was expanded. The presence of the spacer exerts the same effect on the liquid crystal as the conventional VA protrusion and affects the arrangement of the liquid crystal. In the example shown in FIG. 6, the spacer 30 together with the slit 26 is pointed from the center of the colored pixel opening. Or it arrange | positions axisymmetrically, it will look isotropic from the left-right and the up-down direction, and it will lead to expansion of a visual field and suppression of display nonuniformity. The spacer may be a resin alone or a laminate of RGB colored layer resins. In FIG. 6, which is a plan view of the second substrate, an oblique slit 29 formed on the first substrate and having an inclination of 45 degrees is projected and shown. Further, it is desirable that the spacers are arranged so that the density of the spacers is uniform as a whole at the four to four corners of the BM intersection. Of the four corner spacers, one to three spacers may be sub-spacers having a low height.

Furthermore, in the liquid crystal display device having the above-described color filter of the present invention as the second substrate, the first substrate is 45 degrees with respect to the BM side of the second substrate at the center of the pixel electrode of the substrate. It is effective to use a pattern having an oblique slit 29 having a pattern orthogonal to each other. In this transmissive liquid crystal display device, there is no VA protrusion or the like in the transmissive portion facing the pixel electrode, that is, the colored pixel opening, and part of the light transmitted through the pixel electrode is not absorbed by the protrusion. A bright liquid crystal display device can be obtained by the effect of the slit 29. In addition, since the alignment direction of the liquid crystal molecules is spread over 360 degrees by the cross-shaped slit 29 in the center of the pixel electrode, there is little generation of disclination, less display unevenness and brightness unevenness, and a liquid crystal display device with good display quality can be obtained. It is done.

  Specific examples of the present invention will be described below.

<Example 1>
On the transparent glass substrate, the photosensitive black resin composition was patterned to form a black matrix as shown in FIG. The BM line width was a cellular pattern having a narrow side of 5 μm, a thick side of 34.5 μm, an opening size of 42 μm wide, and 106.55 μm long. Here, the transmittance was 67.5% when only the opening portion and the light shielding portion were calculated.

  Next, an acrylic photosensitive coloring composition not containing a colorant is uniformly applied and dried on the BM-formed substrate by spin coating. Next, exposure is performed by irradiating ultraviolet rays through a photomask having a light-shielding pattern corresponding to the above-described cellular pattern of BM, development is performed using a developer of an alkaline aqueous solution, and finally baking is performed to form pixel openings. Part was formed.

Next, an ITO layer having a thickness of 150 nm was formed on the substrate by a sputtering method. Further, as shown in FIG. 7B, the 10 μm ITO adjacent to the pixel opening on the thick side of the BM surrounding the pixel opening was removed using a wet etching method, and the slit was disposed on the BM. A second substrate of Example 1 was created. Here, if the light cut by the BM having a width of 5 μm is guided to the opening, the transmittance becomes 73.8% when only the opening and the light-shielding part are calculated, which is increased by 6.3%. .

<Example 2>
On the transparent glass substrate, the photosensitive black resin composition was patterned to form a black matrix as shown in FIG. The BM line width was a cellular pattern with a narrow side of 5 μm, a thick side of 20 μm, an opening dimension of 42 μm wide, and 106.55 μm long. Here, the transmittance was 83.7% when only the opening portion and the light shielding portion were calculated. On the BM-formed substrate, pixel openings were formed in the same manner as in Example 1, and an ITO layer was further formed.

  Next, as shown in FIG. 8B), ITO having a width of 10 μm at the center of the thick side of the BM surrounding the pixel opening is removed by wet etching, and a slit is disposed on the BM. A second substrate of Example 2 was created. Here, assuming that light cut by a BM having a width of 10 μm at the center and a width of 5 μm on one side is guided to the opening, the transmittance becomes 87.6% when only the opening and the light-shielding portion are calculated. % Will be up.

  Next, a polyimide alignment layer was formed on the obtained second substrate of Example 1 and Example 2. A polarizing plate was formed on the other surface of the second substrate. On the other hand, a TFT array and a pixel electrode were formed on the surface of a separately prepared glass substrate to form a first substrate, that is, a TFT substrate. The second substrate of the uncolored color filter of Example 1 and Example 2 prepared in this way and the first substrate of the TFT substrate are made to face each other so that the electrode layers face each other, and columnar spacers made of transparent resin are provided. The substrate was aligned while keeping the distance between the two substrates constant, and the periphery was sealed with a sealant so as to leave an opening for injecting the liquid crystal composition. Next, a liquid crystal composition having negative dielectric anisotropy was injected from the opening, and the opening was sealed to obtain a liquid crystal cell. Further, a polarizing plate was attached to both sides of the liquid crystal cell to obtain a liquid crystal panel. This liquid crystal panel was combined with a backlight unit to obtain a liquid crystal display device. The liquid crystal display device for monochrome display obtained in this example showed good display quality in both Example 1 and Example 2. The luminance increased by 5% in Example 1 and increased by 3% in Example 2 as compared to that using a second substrate in which no slit was provided.

The conceptual diagram explaining a liquid-crystal drive system (TN, VA, IPS system). 1 is a schematic cross-sectional view of an example of a transmissive liquid crystal display device according to the present invention. FIG. 3 is a schematic plan view of a pixel portion of an example of a color filter of the present invention. Schematic explaining the liquid crystal aligning effect of a slit. FIG. 4 is an enlarged cross-sectional view around a BM along the line X-X ′ in FIG. 3. The schematic plan view of the pixel part of the other example of the color filter of this invention. FIG. 3 is a plan view illustrating a pixel / BM shape and a slit according to the first exemplary embodiment. FIG. 6 is a plan view showing a pixel / BM shape and slits of Example 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Color filter 5 ... Electric force line 7 ... Liquid crystal display device 10 ... 1st board | substrate (TFT substrate) 11 ... Transparent substrate 12 ... Gate insulating film 13 ... Scanning Line 14 ... Signal line 15 ... Pixel electrode 16 ... TFT array 17 ... Alignment film 18 ... Polarizing plate 19 ... Backlight 20 ... Second substrate (color filter substrate) 21 ... Transparent substrate 22 ... Black matrix 23 ... Colored pixel (opening)
24 ... Overcoat 25 ... Common electrode 26 ... Slit 27 ... Alignment film 28 ... Polarizing plate 29 ... (oblique, cross-shaped) slit 30 ... Spacer 40 ... Liquid crystal 41 ... Liquid crystal molecule 50 ... Three-wavelength lamp

Claims (7)

Initially, an electric field is not applied between the first substrate on which the transmissive portion including the plurality of pixel electrodes is formed and the second substrate on which the common electrode facing the plurality of pixel electrodes is formed. Used in a liquid crystal display device having a liquid crystal layer composed of a liquid crystal having a negative dielectric anisotropy in which the alignment state exhibits a vertical alignment,
The second substrate has a multicolored colored pixel opening at each position partitioned by a black matrix (BM), and a plurality of slits in the common electrode as alignment regulating means for regulating the alignment of the liquid crystal In the color filter provided with
The color filter characterized in that the slit extends over the BM and the colored pixel opening. Initially, an electric field is not applied between the first substrate on which the transmissive portion including the plurality of pixel electrodes is formed and the second substrate on which the common electrode facing the plurality of pixel electrodes is formed. Used in a liquid crystal display device having a liquid crystal layer composed of a liquid crystal having a negative dielectric anisotropy in which the alignment state exhibits a vertical alignment,
The second substrate has a multicolored colored pixel opening at each position partitioned by a black matrix (BM), and a plurality of slits in the common electrode as alignment regulating means for regulating the alignment of the liquid crystal In the color filter provided with
The color filter, wherein the slit is disposed on the BM. Initially, an electric field is not applied between the first substrate on which the transmissive portion including the plurality of pixel electrodes is formed and the second substrate on which the common electrode facing the plurality of pixel electrodes is formed. Used in a liquid crystal display device having a liquid crystal layer composed of a liquid crystal having a negative dielectric anisotropy in which the alignment state exhibits a vertical alignment,
The second substrate has a multicolored colored pixel opening at each position partitioned by a black matrix (BM), and a plurality of slits in the common electrode as alignment regulating means for regulating the alignment of the liquid crystal In the color filter provided with
The color filter, wherein the slits are arranged on the BM in a patterned state. Initially, an electric field is not applied between the first substrate on which the transmissive portion including the plurality of pixel electrodes is formed and the second substrate on which the common electrode facing the plurality of pixel electrodes is formed. Used in a liquid crystal display device having a liquid crystal layer composed of a liquid crystal having a negative dielectric anisotropy in which the alignment state exhibits a vertical alignment,
The second substrate has a multicolored colored pixel opening at each position partitioned by a black matrix (BM), and a plurality of slits in the common electrode as alignment regulating means for regulating the alignment of the liquid crystal In the color filter provided with
The color filter according to claim 1, wherein the slit is provided in a state of being patterned on the BM and the colored pixel opening.   5. The color filter according to claim 1, wherein the slits are arranged on BMs on four sides surrounding the colored pixel openings, and 1-4 on four corners of a BM intersection. A color filter, characterized in that a spacer is disposed at a location to maintain a holding interval (cell gap) between the first substrate and the second substrate.   A liquid crystal display device comprising the color filter according to claim 1. 7. The pixel center portion of the pixel electrode of the first substrate has an oblique slit having a pattern orthogonal to the BM side of the second substrate at an inclination of 45 degrees. Liquid crystal display device.