KR20010103193A - Color Filter and Liquid Crystal Display Apparatus - Google Patents

Abstract

The present invention is laminated on the transparent substrate in the order of a colored layer, a transparent electrode, a projection pattern for division alignment of various colors, and at the same time a portion of the colored layer is superimposed to form a black matrix,

A. A spacer made up of a part of the projection pattern for divided alignment is provided on the transparent electrode on the black matrix, or

B. A color filter and a liquid crystal display device using the same, characterized in that a transparent electrode and a spacer made of the same material as that of the division pattern are directly provided on the black matrix.

According to the present invention, it is possible to provide a liquid crystal display device having excellent display quality and at the same time achieving a wide viewing angle, and excellent in productivity.

Description

Color Filter and Liquid Crystal Display Apparatus}

The present invention relates to a color filter having a projection pattern for divisional alignment and a spacer function, and a liquid crystal display device using the same.

The cell structure of the conventional color liquid crystal display device basically consists of a board | substrate which has a color filter, and the opposing board | substrate which formed the electrically conductive film on the transparent substrate like TFT array substrate. Here, as a typical manufacturing method of a color filter, for example, as shown in Japanese Patent Application Laid-Open No. 2-1311, first, a black matrix on a transparent substrate, followed by red (R), green (G), and blue (B) pixels To form a top coat, as needed.

The black matrix represents a light shielding area arranged between each pixel, and is provided to improve the display contrast of the liquid crystal display device and to prevent light from incident and malfunctioning in an active element such as a TFT. Usually, a black matrix is formed by patterning what laminated | stacked metals, such as chromium and nickel, or these oxides, on the transparent substrate.

The transparent electrode required for driving the liquid crystal in the electric field is formed thereon. In assembling the cell, after the alignment film is formed on the transparent electrode in order to align the liquid crystal, a rubbing treatment is performed. Then, it moves to a cell assembly process, is bonded with a counter substrate, and liquid crystal injection is performed.

In addition, in recent years, as the liquid crystal display device is enlarged to larger screens and developed to monitor applications, an enlargement of the viewing angle is required. Development of a VA (vertical alignment) liquid crystal display device using a negative type liquid crystal with respect to a positive type liquid crystal used by the conventional TN method was advanced, and MVA (orientation division vertical direction) liquid crystal display device was developed as this improved type (Example See, for example, ELECTRONIC JOURNAL October 1997, page 33, or SOCIETY FOR INFORMATION DISPLAY INTERNATIONAL SYMPOSIUM DIGEST OF TECHNICAL PAPERS VOLUME XXIX, pages 1077 to 1080). This MVA liquid crystal display device is characterized by a wide viewing angle and automatically controls the liquid crystal array direction by providing projections on the surfaces of the TFT substrate and the color filter substrate in order to divide the alignment on the pixel of the color filter. In this system, formation and configuration of the projection pattern for divided alignment are technically important.

In general, in order to maintain the thickness (cell gap) of the liquid crystal layer, a liquid crystal display device is used as a spacer by sandwiching plastic beads, glass beads, or glass fibers between two liquid crystal display substrates. Although spacers, such as plastic beads, are carried and spread in airflow, it is difficult to disperse | distribute uniformly, without aggregating under the influence of airflow and static electricity at the time of spacer dispersion, such as plastic beads. Agglomeration of the spacers has the drawback that the agglomeration portion is uneven in the cell gap, and the display quality tends to deteriorate.

Moreover, since a spacer exists also in the display area (light transmission part in the screen except a plastic matrix part) on the board | substrate for liquid crystal display devices, there also existed a problem that the display quality of a liquid crystal display device fell by light scattering and transmission by this spacer.

Furthermore, since the projection pattern for divisional orientation is formed on the color filter, curvature occurs on the surface of the color filter, and there is a problem that it is difficult to obtain a sufficiently uniform cell gap in a spacer such as a conventional plastic bead.

In addition, in order to simplify the process and reduce the cost, the above-described black matrix is omitted, and instead, when the black matrix is formed by superimposing a part of the adjacent colored layers, it is likewise possible that the black matrix portion is convex to obtain a uniform cell gap. There was a problem of difficulty.

SUMMARY OF THE INVENTION An object of the present invention is to provide a color filter that provides an MVA liquid crystal display device having excellent display characteristics and characteristics at a wide viewing angle, and in particular, realizes a uniform cell gap to improve display quality and at the same time have good productivity. To provide.

1 is a schematic plan view showing an example of an application pattern of a colored layer in the present invention.

Fig. 2 is a schematic plan view showing an example of a color filter substrate having an alignment dividing protrusion and a spacer of the present invention.

3 is a schematic plan view showing an example of an application pattern of a colored layer in the present invention.

4 is a schematic plan view showing an example of a color filter substrate having an alignment dividing protrusion and a spacer according to the present invention.

Fig. 5 is a schematic plan view showing an example of a color filter substrate having an alignment dividing protrusion and a spacer of the present invention.

Fig. 6 is a schematic plan view showing an example of a color filter substrate having an alignment dividing protrusion and a spacer of the present invention.

7 is a schematic plan view showing an example of an application pattern of a colored layer in the present invention.

8 is a schematic plan view showing an example of an application pattern of a colored layer in the present invention.

9 is a schematic plan view showing an example of an application pattern of a colored layer in the present invention.

10 is a schematic plan view showing an example of an application pattern of a colored layer in the present invention.

Fig. 11 is a schematic plan view showing an example of a color filter substrate having an alignment dividing protrusion and a spacer of the present invention.

12 is a schematic plan view of the color filter substrate having the alignment dividing protrusion and the spacer prepared in Comparative Example 2. FIG.

<Explanation of symbols for the main parts of the drawings>

1: pixel portion (red (1R), green (1G), blue (1B))

2 to 10 (10 '): color overlap black matrix portion

11, 12: projection division projection

13: Spacer which consists of the same material as an orientation division processus | protrusion.

14, 14 ': 2-color overlap black matrix

15: 3-Color Overlapping Black Matrix

16: resin black matrix

17: Dot-shaped spacer which consists of a colored layer.

Red colored layer 17B, green colored layer 17G, blue colored layer 17B

The object of the present invention

(1) Laminating | stacking in order of the coloring layer of various colors, a transparent electrode, and the projection pattern for division orientation on a transparent substrate, and simultaneously superimposing a part of this coloring layer to form a black matrix,

A. The spacer which consists of a part of said division | segmentation projection pattern on the transparent electrode on this black matrix is provided, or

B. It is achieved by the color filter characterized by providing the transparent electrode and the spacer which consists of the same material as the said division | segmentation projection pattern directly on this black matrix.

As a preferable example, for example, a part of the colored layer has a black matrix in which two colors are overlapped, and a spacer with a third color pattern is provided on the black matrix, and a spacer satisfying the requirement A is formed thereon. And a black matrix in which two colors are superimposed on a part of the colored layer and a black matrix in which three colors are superimposed on a part of the colored layer, and a spacer is provided on the black matrix in which the three colors are superimposed.

<Embodiment of the invention>

Hereinafter, the present invention will be described in more detail.

The transparent substrate used for the color filter of the present invention is not particularly limited, and inorganic glass such as quartz glass, boron silicate glass, aluminosilicate glass, soda-lime glass coated with silica, organic plastic film or sheet, etc. It is preferably used.

First, a colored layer is laminated on a transparent substrate. In the color filter, the pixel formed by each color layer which consists of three primary colors is made into 1 time, and is comprised by many times. As the three primary colors, red (R), green (G), blue (B) or cyan (C), magenta (M), and yellow (Y) are usually used, and each pixel is formed of these three color layers.

As a coloring agent used for a colored layer, Preferably, an organic pigment, an inorganic pigment, dye, etc. can be used, Moreover, various additives, such as a ultraviolet absorber, a dispersing agent, a leveling agent, can also be added. As a pigment (R), Red (R), Color Index No.9, 97, 122, 123, 149, l68, 177, 180, 192, 215, etc., Green (G), Color Index No.7, 36, etc. Blue (B) As the color index NO.15, 22, 60, 64, etc. are generally used. As a dispersing agent, it is used extensively as surfactant, the intermediate of a pigment, the intermediate of a dye, a polymeric dispersing agent, etc.

Although it does not specifically limit as resin used for a colored layer, Photosensitive or non-photosensitive materials, such as an epoxy resin, an acrylic resin, a urethane resin, polyester resin, polyimide resin, and polyolefin resin, can be used. Since the colored layer of the present invention is preferably formed of a resin which is finely processed, thermally stable and mechanically strong, the use of acrylic resins, polyimide resins, and epoxy resins is particularly preferred.

Although it does not specifically limit as polyimide-type resin here, It is preferable to use what imidated the polyimide precursor which has a structural unit represented by the following general formula mainly as a heating or a suitable catalyst.

In formula, n is a number of 1-2. R ¹ is an acid component residue and represents a trivalent or tetravalent organic group having two or more carbon atoms. In terms of heat resistance, R ¹ contains a cyclic hydrocarbon, an aromatic ring or an aromatic heterocycle, and at the same time, a trivalent or tetravalent group having 6 to 30 carbon atoms is preferable. Examples of R ¹ are phenyl group, biphenyl group, t-phenyl group, naphthalene group, perylene group, diphenyl ether group, diphenyl sulfone group, diphenyl propane group, benzophenone group, biphenyl trifluoropropane group, cyclobutyl group Although group derived from the cyclopentyl group etc. are mentioned, It is not limited to this.

R ² represents a divalent organic group having two or more carbon atoms. In view of heat resistance, R ² contains a cyclic hydrocarbon, an aromatic ring or an aromatic heterocycle, and at the same time, a divalent group of 6 to 30 is preferable. Examples of R ² are phenyl group, biphenyl group, t-phenyl group, naphthalene group, perylene group, diphenyl ether group, diphenyl sulfone group, diphenyl propane group, benzophenone group, biphenyl trifluoropropane group, diphenylmethane Although group derived from group, a cyclohexyl methane group, etc. are mentioned, It is not limited to this. The polymer which has the structural unit represented by General formula (1) as a main component may be comprised from 1 each of R <^1> , R <^2> , and may be the copolymer which consists of 2 or more types, respectively.

Moreover, as acrylic resin, it is 3 to 3 in the alkyl acrylate or alkyl methacrylate, cyclic acrylate or methacrylate, hydroxyethyl acrylate, or methacrylate, such as acrylic acid, methacrylic acid, methyl acrylate, and methyl methacrylate. It is especially preferable to use resin which superposed | polymerized about the molecular weight 5000-200000 using about 5 types of monomers. The acrylic resin material is not limited to photosensitive or non-photosensitive, but a photosensitive material is preferably used in view of ease of fine processing. In the case of photosensitive resin, the composition which mix | blended acrylic resin, a photopolymerizable monomer, and a photoinitiator is used preferably. As a photopolymerizable monomer, there exist a bifunctional, trifunctional, and polyfunctional monomer, and 1,6-hexanediol diacrylate, ethylene glycol diacrylate, neopentyl glycol diacrylate, triethylene glycol acrylate, etc. are mentioned as a bifunctional monomer. The trifunctional monomers include trimethylolpropane triacrylate, pentaerythritol triacrylate, tris (2-hydroxyethyl) isocyanate, and the like. As the polyfunctional monomers, ditrimethylolpropane tetraacrylate, dipentaerythritol penta And hexaacrylates. In addition, as a photoinitiator, benzophenone, thioxanthone, imidazole, a triazine system, etc. are used individually or in mixture.

As a method of forming a colored layer, patterning is performed after apply | coating and drying the paste containing a coloring agent on a board | substrate. As a method of dispersing or dissolving a colorant to obtain a coloring paste, there is a method of mixing a resin and a colorant in a solvent and then dispersing it in a disperser such as a triaxial roller, a sand grinder, a ball mill, and the like. Do not.

As a method of apply | coating a coloring paste, the dip method, the roll coater method, the spinner method, the die coating method, the wire bar coating method, etc. are used preferably, and heat drying (semi-curing) is performed using an oven and a hotplate after that. . Although semi-curing conditions differ according to resin, solvent, and paste application amount to be used, it is preferable to heat at 60-200 degreeC normally for 1 to 60 minutes. In addition, a colored layer can also be formed by a transfer method.

The colored paste film thus obtained is exposed and developed after forming a photoresist film thereon when the resin is a non-photosensitive resin, and after forming an oxygen barrier film if necessary when the resin is a photosensitive resin. After the photoresist film and the oxygen barrier film are removed, heat drying (main curing) is performed.

The present curing conditions slightly vary depending on the amount of coating when a polyimide resin is obtained from the precursor, but is usually heated at 200 to 300 ° C. for 1 to 60 minutes. In the case of acrylic resin, this curing conditions are generally heated at 150-300 degreeC for 1 to 60 minutes normally. The patterned colored layer is formed on a board | substrate by the above process.

The color filter of this invention forms a black matrix by superimposing a part of colored layer in various colors (henceforth a color superimposition black matrix). After the colored layer of the first color is formed on the transparent substrate over the entire surface as described above, unnecessary portions are removed by the photolithography method, the desired colored layer pattern is formed, and then the same operation is repeated. The coloring pattern of a 2nd color and the coloring pattern of a 3rd color are formed. At this time, a black matrix is formed by overlapping a part of the colored layer with each other. That is, this color overlap part turns into a black matrix.

Color superimposition The black matrix superimposes a colored layer two or three colors. That is, all black matrices may be two colors overlapped, all black matrices may be three colors overlapped, some of the black matrices may be two colors overlapped, others may be three colors overlapped, From the point of liquid crystal injectability, the area ratio of the two-color overlapping black matrix in the total black matrix is preferably 50 or more, more preferably 75 or more. When the ratio of the two-color overlap black matrix is more than this, the liquid crystal injection time is shortened and the bubble residual amount is preferable, which is preferable.

The black matrix pattern is formed to fill the pixel pattern, and there are a stripe shape, a lattice shape, a bird-shaped lattice shape, and the like, but the shape of the black matrix is not particularly limited. Most preferred.

Conventionally, although the black matrix was formed by patterning a lamination of metals such as chromium and nickel or oxides thereof on a transparent substrate, the black matrix due to the color overlap of the present invention reduces manufacturing cost, waste disposal cost, and environmental pollution. It is especially preferable at such a point.

As thickness of a colored layer, 0.5-3.0 micrometers is preferable, More preferably, it is 1.0-2.5 micrometers, More preferably, it is 1.5-2.0 micrometers.

As color overlap width, 2-60 micrometers is preferable, More preferably, it is 5-45 micrometers, More preferably, it is 10-30 micrometers. The color overlap width becomes the color overlap black matrix width. If the color overlap width is narrower than this range, the color overlap precision is insufficient, making it difficult to form a complete black matrix. In addition, when the color overlap width is wider than this range, the aperture ratio decreases, the transmittance in the liquid crystal panel becomes small, and the problem that panel brightness is insufficient tends to occur.

The total film thickness of the color overlap black matrix is preferably 1.0 to 9.0 μm, more preferably 2.0 to 7.5 μm, even more preferably 3.0 to 6.0 μm. If the film thickness is thinner than 1.0 mu m, it is not preferable because it is difficult to form a spacer having a sufficient height and the light shielding property is insufficient. On the other hand, when the film thickness is thicker than 9.0 mu m, a spacer having a sufficient height can be formed, but it is not preferable because flatness of the color filter is easily sacrificed, and a step is easily caused or a display unevenness tends to occur.

Although the light-shielding property of a color superimposition black matrix is represented by OD value, in order to improve the display quality of a liquid crystal display device, Preferably it is 1.0 or more, More preferably, it is 2.0 or more. Color Overlapping It is more preferable to overlap three colors in order to increase the OD value of a black matrix, but when two colors overlap, it is preferable to overlap blue and red, or cyan and magenta.

Although the opening part which consists of one color layer of (20-400) micrometer x (20-400) micrometer normally is provided between the color overlap black matrices, this opening part functions as a pixel of each color. The array of pixels includes, but is not limited to, a triangle array, a mosaic array, a stripe array, and the like.

The color overlap black matrix determines the dimensional and positional precision of the openings. The dimension accuracy and the position accuracy of the openings preferably have an accuracy of ± 5 μm or less with respect to the design dimensions and the design positions of the openings, more preferably ± 3 μm or less. More preferably ± 2 μm or less. If the accuracy is high, no display defects such as light leaking out occur. In addition, if the accuracy is not better than this, display defects such as light leaking are likely to occur. In order to obtain such a precision, it is preferable to process the pattern precision of a colored layer in the surface of less than +/- 5micrometer error, More preferably, it is +/- 3micrometer or less, More preferably, it is +/- 2micrometer or less. In addition, the positioning accuracy of each colored layer is also preferably ± 5 μm or less, more preferably ± 3 μm or less, still more preferably ± 2 μm or less.

It is preferable to form the frame-shaped black matrix by laminating | stacking a colored layer similarly about the screen periphery.

Thereafter, a transparent protective film may be formed as necessary. The formation of the protective layer is disadvantageous in that the manufacturing process of the color filter is increased and the manufacturing cost is high. On the other hand, it is preferable to control the spacer height, to prevent the elution of impurities in the color filter, and to planarize the surface. Although the film thickness of a protective film is not specifically limited, 0.05-2.0 micrometers is preferable and 0.1-0.5 micrometer is more preferable.

Next, a transparent electrode is provided. The transparent electrode can be laminated with ITO, tin oxide, zinc oxide or the like using a method such as vacuum deposition, sputtering or CVD.

Finally, the projection pattern for divisional alignment is formed, and at the same time, a spacer made of a part of the projection pattern for divisional alignment or the same material as the projection pattern for divisional orientation is provided on the color overlap chip black matrix. In other words, when the colored layer is formed on a transparent electrode on a black matrix in which two or three colors are overlapped, a part of the divided alignment protrusion pattern may be provided to have a function of a spacer, or when forming the divided alignment protrusion pattern, The spacer pattern may be simultaneously formed of the same material separately from the divided alignment projection pattern. Of course, both can also be formed simultaneously. Moreover, after providing the spacer pattern by the 3rd color layer on the two-color overlap black matrix, the spacer which consists of a transparent electrode and a part of projection pattern for division orientation can also be formed on it again.

Compared with the conventional method of laminating three colors while aligning a spacer dot pattern on a black matrix such as resin or metal, as in the conventional color filter, the color filter of the present invention has a spacer on a black matrix having already overlapped various colors. Since the pattern is formed, the number of laminations for forming the spacer can be reduced. Therefore, alignment operation of a spacer is easy and productivity is excellent.

In addition, the conventional color filter is processed to partially overlap the colored layer on a black matrix, such as resin or metal, in order to prevent discoloration, so that the area where the dot pattern for spacers can be formed is significantly limited, so that the degree of freedom in pattern design small. As a result, numerous small patterns are formed and spacers are not laminated as designed according to pattern defects or positional shifts.

On the other hand, since the color filter of the present invention does not have such a spacer formation region, there is a large degree of freedom in design, for example, it is possible to enlarge the spacer area up to the same area as the black matrix as much as possible. The spacer pattern can be arranged freely anywhere. Therefore, the pattern defect and position shift can also be improved, the machining precision is also good, and the productivity is particularly excellent.

In addition, although the division alignment projection should just be originally formed on the pixel, a part of the division orientation projection is formed also on the color overlap black matrix as an example of the color filter of this invention, and it plays a role as a spacer. When the color superimposition black matrix is used, the orientation disturbance of a liquid crystal tends to occur on and around a black matrix, the nonuniformity tends to occur also in a divisional orientation, and a display becomes uneven easily. Therefore, by forming the projection pattern for divisional alignment on the black matrix, the orientation disturbance can be prevented, and at the same time, the divisional orientation can act effectively (the orientation control force becomes stronger), and thus the display characteristics are particularly good, which is more preferable. . That is, it is more preferable to form the projection pattern for divisional orientation which does not act as a spacer on the black matrix-shaped transparent electrode which overlapped at least two book color layers.

First, the projection pattern for division orientation is demonstrated. As an example of the cross-sectional shape of the projection pattern for division orientation, a triangular shape, a continuous linear pattern of semicircle shape to a trapezoidal shape, a triangular pyramid to a triangular cross-section cone, a dot pattern of a trapezoidal cross-section cone, etc. are used preferably. As a pattern, if the orientation direction of the liquid crystal molecule on a pixel can be divided into 2 or more divisions, it will not specifically limit. For example, if the division alignment projection is a stripe having a triangular or trapezoidal cross section, it can be divided and oriented in two directions by two slopes, and if it is a triangular waveform (“letter cutout”), it can be oriented in four divisions. In addition, if the projection for divisional orientation is a pyramid, the number of divisional orientations is determined by the number of slopes, and if it is a quadrangular pyramid, for example, quadrilateral orientation can be obtained. On the other hand, if it is a cone, infinite division orientation can be obtained.

Although the material used for the projection pattern for division orientation is not specifically limited, The same material as resin used for a colored layer can be used. For example, photosensitive or non-photosensitive materials such as epoxy resins, acrylic resins, urethane resins, polyester resins, polyimide resins, and polyolefin resins can be used. In this, an acrylic resin and a polyimide resin are especially preferable at the point of workability and mechanical strength. In addition, a positive photoresist and a negative photoresist are also excellent in pattern workability and the mechanical strength as a pillar, and can be used preferably. Examples of the positive type resist include a main chain cleavage type, a novolak resin, a naphthoquinone diazide-based photosensitive agent, and a chemical amplification type, but a mixture of a cresol novolak resin and a naphthoquinone diazide-based photosensitive agent is most preferred. A light irradiation part is soluble in alkali, and pattern processing is possible. Negative resists are crosslinked and chemically amplified.

Moreover, the material which disperse | distributed the pigment in resin is more preferable at the point which is excellent in pattern workability and mechanical strength. As a pigment, an insulating white pigment is more preferable, For example, what consists of titanium oxide, silicon oxide, aluminum oxide, calcium carbonate, magnesium oxide, lead oxide, chromium oxide, iron oxide, zirconia, and barium sulfate is especially preferable. As a pattern formation method of a processus | protrusion, the method similar to the pattern formation method of a colored layer can be used.

It is preferable that it is 0.5 micrometer-6 micrometers, and, as for the height of the division orientation projection, the range of 0.6 micrometer-3 micrometers is more preferable. If the projection height is less than 0.5 µm, the effect of divisional orientation is not sufficient, which is undesirable. On the other hand, if the height of the projections exceeds 6 µm, coating spots may occur, or formation of the projections by photolithography becomes difficult, and liquid crystal injection is disturbed, which is not preferable. In addition, it is preferable from the viewpoint of liquid crystal injection property that the height of the division alignment projections is higher than the thickness of the colored layer. 1.0 or more are preferable, and, as for ratio (thickness of the height / coloring layer of the division | annular division process | protrusion for both), more preferably 1.2 or more.

Next, the case where a part of the divided alignment projection pattern provided on the color overlap black matrix is used as a spacer, and the case where the spacer is formed of the same material as the divided alignment projection pattern will be described. The shape of the spacer, that is, the shape of the cross section in the case of cutting the spacer in a plane parallel to the substrate, is not particularly limited, but a circle, an ellipse, a polygon with rounded angles (for example, a rectangle), a cross, a T, or an L Or 자 is preferable. In addition, even when forming a spacer by lamination | stacking with the colored layer of the lower layer, although the spacer shape of each layer is not restrict | limited, Always maintain a constant contact area even when the junction shift | deviation with CF and TFT board | substrate arises. In order to broaden the bonding margin, that is, a circle, an ellipse, a rounded polygon, a cross, a T, or an L-shape are preferable, and these may be arbitrarily stacked to form a spacer. In particular, when using a part of the projection pattern for divisional orientation as a spacer, it is preferable to make the shape of the spacer part into a circle, an ellipse, and a rounded rectangle.

The height of the spacer is preferably 1 to 9 µm, and more preferably 2 to 8 µm. If the height of the spacer is lower than 1 mu m, it is difficult to secure a sufficient cell gap. On the other hand, when it exceeds 9 micrometers, the cell gap of a liquid crystal display device becomes excessively high, and the voltage required for driving becomes high and it is unpreferable. In addition, the height of a spacer means the height difference (step difference) between the opening pixel of a color filter and the uppermost surface of an adjacent spacer, paying attention to one spacer. If there is a nonuniformity in height within the pixel, this indicates a value when the step becomes maximum in the pixel.

The area per one of the spacers and the placement place are greatly influenced by the structure of the liquid crystal display device. In the color filter having a fixed spacer, the spacer area per one in the screen is preferably 10 µm ² to l500 µm ² due to the area constraint of the non-display area in one pixel. And more preferably 20 μm ² to 800 μm ^2, more preferably 100 to 500 μm ^2. When the area of each spacer is smaller than 10 μm ² , precise pattern formation and lamination are difficult, and in some cases, the spacer is broken by application of pressure during device manufacturing of the liquid crystal display device. If the area of each spacer is larger than l500 µm ² , the orientation is disturbed around the spacer, resulting in uneven display. In addition, it is not preferable to arrange the spacers in the screen only on the black matrix (non-display area) or to cause bubbles to occur at low temperatures.

The spacer area referred to herein refers to a color in which a spacer made of a part of the divided alignment protrusion pattern formed on the color filter or a spacer made of the same material as the divided alignment protrusion pattern is provided on the color overlap black matrix and the black matrix beneath it. It is an area which is in contact with a spacer made of a layer. That is, it is the base area of the uppermost spacer part. The number of spacers is preferably formed from 0.1 to 10 per pixel, more preferably from 0.2 to 3. The spacer area per pixel is preferably 10 to 1500 μm ² , more preferably 20 to 800 μm ² , even more preferably 100 to 500 μm ² .

In addition, in order to improve the uniformity of the screen between the two liquid crystal display substrates held by the spacer, it is preferable to form the spacer in the frame-like black matrix around the screen and the non-display area outside the screen. Since the spacers outside the screen and the liquid-field dreams do not appear in the display area, the area per spacer is preferably equal to or larger than the spacer area in the screen to facilitate formation of the spacers.

Since the color filter of this invention arrange | positions the uppermost layer of a spacer on a transparent conductive layer, by selecting what is electrically insulating as a material of this spacer, even when the position shift occurs at the time of joining with a TFT substrate, The defect which the opposing TFT electrode substrate shorts can be avoided. Prevention of a short circuit is effective in a high aperture ratio liquid crystal display device in which electrodes and wirings are densely arranged. The volume resistivity of the spacer is preferably 10 ⁷ Ω · cm or more, more preferably 10 ⁹ Ω · cm or more.

Preferred examples of the color filter of the present invention are as follows.

(a1) A color filter having a black matrix formed by superimposing two colors on a part of a colored layer, and formed on the black matrix in the order of a spacer composed of a transparent electrode and a part of a projection pattern for divided alignment.

(a2) A color filter having a black matrix formed by superimposing two colors on a part of the colored layer, and formed on the black matrix in the order of a spacer made of the same material as the transparent electrode and the projection pattern for divided alignment.

(b1) It has a black matrix formed by superimposing two colors on a portion of the colored layer, and further comprises a spacer pattern formed by the third colored layer on the black matrix, a spacer formed of a transparent electrode, and a part of the projection pattern for divided alignment. The formed color filter.

(c1) It has a black matrix formed by superimposing two colors and three colors on a part of a colored layer, and formed on the black matrix formed by superimposing these three colors in order of the spacer which consists of a transparent electrode and a part of projection pattern for division orientation. Color filter.

(c2) A part of the colored layer has a black matrix formed by superimposing two colors and three colors, and the black matrix formed by superimposing these three colors is formed in the order of a spacer made of the same material as the transparent electrode and the projection pattern for divided alignment. The formed color filter.

(dl) A color filter having a black matrix formed by superimposing three colors on a part of a colored layer, and formed on the black matrix in the order of a spacer composed of a transparent electrode and a part of a projection pattern for divided alignment.

(d2) A color filter having a black matrix formed by superimposing three colors on a part of the colored layer, and formed on the black matrix in the order of a spacer made of the same material as the transparent electrode and the projection pattern for divided alignment.

(e) bl, c1. In the structure of c2, the color filter which provided the division | segmentation projection pattern which does not act as a transparent electrode and a spacer on the black matrix which superposed this two colors. This color filter is particularly preferable because it has little orientation disturbance on the black matrix and in the vicinity, large alignment control force due to division alignment projections, and small display unevenness.

In addition, the spacer pattern by the 3rd color layer is a pattern smaller than the width | variety of the color superimposition black matrix, The spacer which consists of a part of division pattern protrusion pattern formed on it, and the spacer which consists of the same material as the process pattern for division orientation It is the basis for forming the film, which is different from the black matrix because there is not enough light shielding area. In the case of providing a spacer made of the same material as the projection pattern for divisional orientation, the spacer is provided after the transparent electric wire is directly laminated on the black matrix without providing the spacer in the colored layer.

Next, an example of the manufacturing method of the electrode substrate provided with TFT element is shown below. A chromium thin film is formed by sputtering on an alkali free glass substrate, and the gate electrode is patterned by photolithography. Subsequently, a silicon nitride film as an insulating film, an amorphous silicon film and a silicon nitride film as an etching stopper are successively formed by plasma CVD. Next, the silicon nitride film of the etching stopper is patterned by photolithography. The TFT terminal performs film formation and patterning of an n + amorphous silicon film for making ohmic contact with the metal electrode, and then forms an ITO film serving as a display electrode to form a pattern. Further, aluminum is attached to the film by sputtering as the wiring material, and the signal wiring and the metal electrode of the TFT are manufactured by photolithography. The n + amorphous silicon film of the channel part was etched away using the drain electrode and the source electrode as a mask, and the electrode substrate provided with TFT element was obtained. In the case of a reflective liquid crystal display element, it is preferable to make a display electrode material with high reflectances, such as aluminum and silver. In addition, it is preferable to provide the alignment dividing protrusions to the electrode substrates facing each other so as to correspond to the alignment dividing protrusions provided on the color filter. In addition, a spacer may be formed on the electrode substrate in order to make the cell gap uniform.

A panel set is demonstrated. First, an alignment film is provided on a color filter, and the alignment film is also provided also to the electrode substrate provided with the thin film transistor which opposes similarly. After bonding these two board | substrates together using sealing agents, such as an epoxy adhesive material, the liquid crystal orientated vertically in the injection hole provided in the sealing part is injected. After injecting the liquid crystal, the injection hole is sealed, and the polarizing plate is further bonded to the outside of the substrate to manufacture a liquid crystal display device.

An example of the top view of the color filter of this invention is shown in FIG. After the ITO transparent electrodes are formed on the black matrix 14 and the pixels 1R, 1G, and 1B, the projections 11 are formed in a trapezoidal cut line shape so as to divide the pixels. The protrusions are formed on the opposing electrode substrate so as to be arranged with the protrusions on the color filter.

The color filter of this invention and the liquid crystal display device using the same are used for display screens of a personal computer, a word processor, an engineering, a workstation, a navigation system, a liquid crystal television, etc., and are also used suitably also for liquid crystal projection. Moreover, in the field of optical communication and optical information processing, it is used suitably also as a spatial modulation element using a liquid crystal. The spatial modulation device modulates the intensity, phase, polarization direction, and the like of light incident on the device according to an input signal to the device, and is used for a real-time hologram, a spatial filter, and an incoherent / coherent conversion.

<Example>

EMBODIMENT OF THE INVENTION Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these.

(Production of Polyimide Precursor)

144.1 g of 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride is mixed with 10 g of gamma -butyrolactone and 209 g of N-methyl-2-pyrrolidone, and 4,4'-dia After adding 95.lg of minodiphenylether and 6.2 g of bis (3-aminopropyl) tetramethyldisiloxane, the mixture was reacted at 70 ° C for 3 hours, then 2.96 g of phthalic anhydride was added and reacted at 70 ° C for 1 hour. The mid precursor (polyamic acid) solution was obtained.

(Measurement of Volume Resistance)

The target material was coated with a thickness of 2 μm on the glass substrate on which the aluminum thin film was deposited. An aluminum electrode having a diameter of 15 mm was again deposited on the coating film. DC lV was applied between the two electrodes sandwiched with the coating film, and the volume resistance value was obtained from the current value and the thickness of the coating film for 5 minutes after voltage application.

<Example 1>

(Production of colored layer)

Pigments of red, green and blue as dianthraquinone pigments represented by Color Index No.6530O Pigment Red 177, phthalocyanine green pigments represented by Color Index No.74265 Pigment Green 36, C0lor Index No.74160 Pigment Blue 15 A phthalocyanine blue pigment represented by -4 was prepared. The pigments were mixed and dispersed in a polyimide precursor solution, respectively, to obtain three types of colored pastes of red, green, and blue.

Subsequently, red, green, and blue colored layers were formed using this coloring paste. First, the red paste was apply | coated on the transparent alkali free glass substrate, and it hardened | cured for 20 minutes at 120 degreeC. Thereafter, a positive photoresist (" Microposit " RC100 30 CP) manufactured by Seaplay Co., Ltd. was applied with a spinner, and then dried at 80 ° C for 20 minutes. Exposure was carried out using a photomask, and the development of the positive photoresist and the etching of the polyimide precursor were simultaneously performed while immersing and shaking the substrate in a tetramethylammonium hydroxide 2 weight aqueous solution. Thereafter, the positive photoresist was stripped with methyl cellosolve acetate, and further cured at 300 ° C for 30 minutes.

The film thickness of the red colored layer was 1.5 μm. The pattern of the red colored layer was formed in the red pixel part position 1R of FIG. 1, and the pattern for color superimposition black matrix formation (2, 3, 5, 6, 7, 8, 9).

After washing the substrate in the same manner, the green colored layer is formed at the position (3, 4, 5, 7, 8, 9, 10) of the green pixel portion position 1G of FIG. 1 and the pattern for forming the color superimposed black matrix. I was. The film thickness of the green colored layer was 1.5 μm in the pixel portion.

In addition, after the substrate is washed with water, the blue colored layer is similarly positioned to position 1B of the blue pixel portion of FIG. 1, and position (2, 4, 5, 6, 7, 9, 10) of the pattern for forming the color superimposed black matrix. Formed on. The film thickness of the blue colored layer was 0.5 µm in the pixel portion.

Through the above steps, the red pixel 1R, the green pixel 1G, and the blue pixel 1B, the red and blue two-color overlap black matrices 2 and 6, and the red and green two-color overlap black matrices 3 , 8), two-color overlap black matrices of green and blue (4, 10) and three-color overlap black matrices of red, blue, and green were formed on the lattice corners (5, 7, 9). The line width of the black matrix was 20 μm on the long side and 30 μm on the short side. 5, 7, and 9 of FIG. 1 were made into 20 micrometers (short side direction) x 30 micrometers (long side direction) angle.

A sputtering method formed an ITO film transparent electrode having a film thickness of 150 nm and a surface resistance of 20 Ω / □.

Furthermore, the polyimide precursor solution was apply | coated and semi-hardened for 20 minutes at 135 degreeC. Thereafter, a positive photoresist was applied and dried at 80 ° C. for 20 minutes. After exposing through a photomask and immersing in a tetramethylammonium hydroxide 2 weight aqueous solution to simultaneously develop the photoresist and etch the polyimide precursor, the photoresist was stripped with methyl cellosolve, followed by 30 at 250 ° C. It hardened for a minute and the projection pattern 11 for triangular waveform divisional orientation shown in FIG. 2 was formed.

The cross-sectional shape of the division alignment projection on the pixel was trapezoidal with a bottom side of 12 µm and an upper side of 8 µm, and the thickness was 2.0 µm. In Fig. 2, the projection patterns on the three-color overlapping black matrix (positions 5, 7, and 9 in Fig. 1) serve as spacers. That is, one spacer is formed per pixel. The area of the spacer base was about 200 μm ² per pixel. The height of the spacer, which is the height from the surface of the ITO layer provided on the blue pixel to the top of the spacer, was within 3.9 μm ± 0.1 μm of the target. Thus, the color filter of this invention was obtained.

(Manufacture of Electrode Substrate)

A chromium thin film was formed by sputtering on an alkali free glass substrate and patterned on the gate electrode by photolithography. Subsequently, a silicon nitride film 700 nm thick as an insulating film, an amorphous silicon film 100 nm thick as a channel layer, and a silicon nitride film 500 nm thick as an etching stopper layer were successively formed by plasma CVD. Subsequently, the silicon nitride film of the etching stopper layer was patterned by photolithography. The TFT terminal and the metal electrode formed an n + amorphous silicon film for making ohmic contact. An ITO film serving as a display electrode was formed thereon and patterned. Further, aluminum as the wiring material was attached to the film by sputtering, and the signal wiring and the metal electrode of the TFT were produced by photolithography. The n + amorphous silicon film of the channel part was etched away using the drain electrode and the source electrode as a mask, and the electrode substrate provided with TFT element was obtained.

(Manufacture and evaluation of color liquid crystal display device)

The vertical alignment film was provided on the color filter of this invention. Similarly, the vertical alignment film was provided also with respect to the electrode substrate provided with the opposing thin film transistor. Also with respect to the opposing electrode substrate, the same processus | protrusion as the cutting line form protrusion on a color filter was arrange | positioned. However, when it joined with a color filter, it arrange | positioned by 1/2 pixel pitch so that a processus | protrusion may be arrange | positioned between the adjoining processes on a color filter. Using an epoxy adhesive as a sealing agent, after bonding these two board | substrates together, the liquid crystal which orientates vertically in the injection hole provided in the sealing part was injected. The liquid crystal injection rate was fast and liquid crystal injection property was very good. After injecting the liquid crystal, the injection hole was sealed, and the polarizing plate was further bonded to the outside of the substrate to manufacture a liquid crystal display device.

In the liquid crystal display device, the alignment of the liquid crystal was good, and at the same time, there was no nonuniformity of the cell gap and the image quality was good. In addition, since there was no spacer in the light transmitting portion, light did not leak out of the spacer. In addition, the electrode substrate facing the transparent conductive film on the color filter was satisfactory without any part shorted by the spacer. The volume resistivity of the projection material for divisional orientation used as the spacer was 10 ¹³ Ω · cm and had insulation.

<Example 2>

In the same manner as in Example 1, red, green, and blue colored layers were formed. However, the red colored layer has the position 1R of the red pixel portion of FIG. 3 and the position (2, 3, 5, 6, 6 ', 7, 8, 8', 9, 10, 10 of the pattern for forming the color overlap black matrix). Formed on '). In addition, the green colored layer was formed at the position 1G of the green pixel part of FIG. 3, and the position 3, 4, 5, 6, 7, 8, 9, 10 of the pattern for color superimposition black matrix formation. In addition, the blue colored layer has the position 1B of the blue pixel portion of FIG. 3 and the position (2, 4, 5, 6, 6 ', 7, 8, 8', 9, 10, 10 ').

By the above process, the red pixel 1R, the green pixel 1G, the blue pixel 1B, the red and blue two-color overlapping black matrixes 2, 6 ', 8', 10 ', red and green 2-color overlap black matrix (3), green and blue 2-color overlap black matrix (4), red, blue, green 3-color overlap black matrix ((5, 6, 7, 8, 9, 10, long side direction) 30 μm in length and 40 μm in length in the short side direction were formed The line width of the black matrix was 20 μm in the long side and 30 μm in the short side as in Example 1.

In the same manner as in Example 1, the ITO film transparent electrode and the projection pattern 11 for triangular waveform divisional orientation shown in FIG. 4 were formed thereon.

The projections for divisional orientation on the pixel had a trapezoid having a bottom side of 12 탆 and an upper side of 8 탆, and having a thickness of 2.0 탆. In Fig. 4, the projection pattern on the three-color overlap black matrix (positions 5, 7, and 9 in Fig. 1) serves as a spacer. That is, one spacer is formed per pixel. The area of the lower spacer portion was about 220 μm ² per pixel. The height of the spacer, which is the height from the surface of the ITO layer provided on the blue pixel to the top of the spacer, was within 3.9 ± 0.1 μm of the target. Thus, the color filter of this invention was obtained.

A liquid crystal display device was manufactured in the same manner as in Example 1. Liquid crystal injection property was favorable. In the liquid crystal display device, the alignment of the liquid crystal was good, and at the same time, there was no nonuniformity of the cell gap and the image quality was good. In addition, since there was no spacer in the light transmitting portion, light did not leak out of the spacer. In addition, the electrode substrate facing the transparent conductive layer on the color filter was good without any part shorted by the spacer.

<Example 3>

In the same manner as in Example 1, red, green, and blue colored layers were formed. The line width of the black matrix was 20 μm on the long side and 30 μm on the short side. Subsequently, in the same manner as in Example 1, an ITO film transparent electrode was formed thereon, and then the projection pattern 11 for triangular waveform divisional alignment shown in FIG. 5 was formed. Moreover, the dot pattern 13 was formed in the upper center part of the three-color overlap black matrix (position of 5, 7, 9 of FIG. 1) using the same material.

The cross-section of the projection pattern for division orientation had a trapezoid of 12 µm in the bottom side and 8 µm in the upper side on the pixel, and the thickness was 2.0 µm. The dot pattern has a shape of 12 μm (short side) x 18 μm (long side) and 8 μm (short side) x 14 μm (long side) at the bottom side, and the spacer base is approximately 216. μm ² . The dot pattern serves as a spacer. That is, spacers are formed one per pixel. The area of the spacer tops in contact with the opposing substrate was about 110 μm ² . The height of the spacer, which is the height from the surface of the ITO layer provided on the blue pixel to the top of the spacer, was within 3.9 ± 0.1 μm of the target. Thus, the color filter of this invention was obtained.

A liquid crystal display device was manufactured in the same manner as in Example 1. The liquid crystal injectability was excellent, and the liquid crystal could be injected into the cell in a short time. In the liquid crystal display device, the alignment of the liquid crystal was good, and at the same time, there was no nonuniformity of the cell gap, and the image quality was good. In addition, since there was no spacer in the light transmitting portion, light did not leak out by the spacer, and the electrode substrate facing the transparent conductive layer on the color filter was good without any portion shorted by the spacer.

<Example 4>

In the same manner as in Example 1, red, green, and blue colored layers were formed. However, the red colored layer was formed at the position 1R of the red pixel portion and the position 2, 3, 4, 5, 6, 7, 8, 9, 10 of the pattern for forming the color overlap black matrix in FIG. In addition, the green colored layer was formed at the position 1G of the green pixel part of FIG. 1, and the position 2, 3, 4, 5, 6, 7, 8, 9, 10 of the pattern for color superimposition black matrix formation. In addition, the blue colored layer was formed in the position 1B of the blue pixel part of FIG. 1, and the position (2, 3, 4, 5, 6, 7, 8, 9, 10) of the pattern for color superimposition black matrix formation.

By the above process, the red pixel 1R, the green pixel 1G, and the blue pixel 1B and the red, blue, and green three-color overlapping black matrixes 2, 3, 4, 5, 6, 7, 8, 9, 10) were formed. The line width of the black matrix was 20 μm on the long side and 30 μm on the short side.

In the same manner as in Example 1, an ITO film transparent electrode was formed thereon, and then the projection pattern 11 for triangular waveform divisional alignment shown in FIG. 6 was formed.

The projection for divisional orientation on the pixel had a trapezoid of 12 µm at the bottom of the cross section and 8 µm at the upper side, and the thickness was 2.0 µm. The projection pattern on the tri-color overlap black matrix (positions 5, 7, and 9 in Fig. 1) serves as a spacer. That is, one spacer was formed per pixel, and the area of the spacer base was about 230 μm ² . Further, the projection pattern on the three-color overlap black matrix (positions 2, 3, and 4 in Fig. 1) also functions as a spacer. That is, two spacers were formed per pixel, and the area of the lower end portion of the spacer was about 160 μm ² per one. Thus, the total area of three spacers per pixel and the total area of the lower end of a spacer was about 550 micrometer <^2> in total per pixel. The height of the spacer, which is the height from the surface of the ITO layer provided on the blue pixel to the top of the spacer, was within 3.9 ± 0.1 μm of the target. Thus, the color filter of this invention was obtained.

A liquid crystal display device was manufactured in the same manner as in Example 1. In the liquid crystal display device, the alignment of the liquid crystal was good, and at the same time, the cell gap was nonuniform, and the image quality was good. In addition, since there was no spacer in the light transmitting portion, light did not leak out of the spacer. In addition, the electrode substrate facing the transparent conductive layer on the color filter was good without any part shorted by the spacer.

Example 5

Red (1R and 2, 3, 5, 6, 7, 8), green (1G, 3, 4, 17B, 8, 9, 10) and blue colored layer in the same manner as Example l (1B and 2, 4, 5, 6, 7 ', 9, 10 of FIG. 9) were formed. In FIG. 10, the red pixel 1R, the green pixel 1G, and the blue pixel 1B, the red and blue two-color overlap black matrices 2, 5 and 6, and the red and green two-color overlap black matrices 3 , 7, 8), green and blue two-color overlap chip black matrix (4, 9, 10), dot-color spacer (17B) of blue colored layer on two-color overlap black matrix of lattice corners (5, 7, 9) ) Was formed. This spacer size was 26 micrometers (long side direction) x 16 micrometers (short side direction), and became the foundation of a spacer. In the same manner as in Example 1, after the ITO film transparent electrode was formed thereon, the projection pattern 12 for triangular waveform divisional alignment shown in Fig. 11 was formed of a positive resist.

First, a positive photoresist (" Microposit " RC100 manufactured by Seaplay Co., Ltd. RC100 30cp) was applied with a spinner, and then dried at 80 ° C for 20 minutes. Exposure was carried out using a photo mask, and the development of a positive photoresist was performed while the substrate was immersed in a tetramethylammonium hydroxide 2 weight aqueous solution and shaken. Then, it hardened | cured for 30 minutes at 200 degreeC. The projection for divisional orientation on the pixel was made into a fish cake shape having a bottom face of 12 mu m in thickness and 1.5 mu m in thickness. Further, a part of the divided alignment pattern DML was designed and changed so that a part of the triangular waveform division alignment projection pattern became a spacer so that a portion of the divided alignment pattern DML became almost rectangular (22 µm in the long side direction and 14 µm in the short side direction). The area of the spacer base was about 310 μm ² per pixel. The height of the spacer, which is the height from the surface of the ITO layer provided on the blue pixel to the top of the spacer, was within 3.9 ± 0.1 μm of the target. Thus, the color filter of this invention was obtained.

In the same manner as in Example 1, a liquid crystal display device was manufactured. Liquid crystal injection property was favorable. In the liquid crystal display device, the liquid crystal alignment was satisfactory, and at the same time, there was no variation in the cell gap, and the image quality was also good. In addition, since there was no spacer in the light transmitting portion, light did not leak out of the spacer. In addition, the electrode substrate facing the transparent conductive layer on the color filter was good without any part shorted by the spacer.

Comparative Example 1

In the same manner as in Example 3, a color filter was prepared. However, no dot spacer (13 in FIG. 5) was provided on the three-color overlap black matrix (positions 5, 7, and 9 in FIG. 1). In addition, the liquid crystal display device was manufactured like Example 4 except having spread | dispersed the polystyrene sphere spacer of 4.0 micrometers in diameter on the color filter before bonding a color filter and an electrode substrate.

Although there was no short circuit between the liquid crystal injectability and the electrode substrate facing the transparent conductive layer on the color filter, the light was leaked by the spacer due to the spacer in the pixel portion. Spheres pressed projections for division and color superimposition black matrix, the orientation of the liquid crystal was disturbed in this vicinity, nonuniformity of the cell gap occurred, the image quality was poor.

Comparative Example 2

(Creation of resin black matrix)

A carbon black mill base having the following composition was dispersed at 7000 rpm for 30 minutes using a homogenizer to filter glass beads, thereby preparing a black paste.

Carbon black mill base

Carbon black

(MAl00, manufactured by Mitsubishi Chemical Corporation) 4.6 parts

24.0 parts of polyimide precursor solution

N-methyl-2-pyrrolidone 61.4 parts

Glass Beads 90.0 Part

The black paste was apply | coated using a spinner on the alkali free glass substrate, and it semi-cured for 20 minutes at 135 degreeC in oven. Subsequently, a positive photoresist ("Microposit" SRC100 30cp manufactured by Seaplay Co., Ltd.) was applied with a spinner, and dried at 90 ° C for 10 minutes. The photoresist film thickness was 1.5 micrometers. It exposed through the photomask using Canon | KK exposure machine PLA-501F.

Subsequently, an aqueous solution at 23 ° C. containing 2 parts of tetramethylammonium hydroxide was used as a developer, and the substrate was immersed in a developer solution while simultaneously shaking the substrate so as to reciprocate 10 cm in width for 1 second for 5 seconds. Etching of the mid precursor was performed simultaneously. The developing time was 60 seconds. Thereafter, the positive photoresist was stripped with methyl cellosolve acetate, and then cured at 300 ° C. for 30 minutes. In this way, the film thickness is 0.9 μm, and the line width of the long side corresponding to the pattern for forming the color-overlapping black matrix of Fig. 1 (2, 3, 4, 5, 6, 7, 8, 9, 10) is 20 μm and the short side A lattice resin black matrix having a line width of 30 μm was provided. The OD value of the resin black matrix was 3.3.

(Formation of Each Colored Layer)

Pigment of red, green, blue as dianthraquinone pigment represented by Color Index No.6530O Pigment Red 177, phthalocyanine green pigment represented by Color Index No 74265 Pigment Green 36, Color Index No 74160 Pigment Blue 15-4 A phthalocyanine blue pigment was prepared. The said pigment was mixed and dispersed in the polyimide precursor solution (1) used for the black matrix, respectively, and three types of coloring paste of red, green, and blue were obtained. First, red paste was apply | coated on the resin black-matrix board | substrate, and it hardened | cured for 20 minutes at 120 degreeC. Thereafter, a positive photoresist (" Microposit " SRC100 manufactured by Seaplay Co., Ltd. SRC100 30 cps) was applied with a spinner, and then dried at 90 ° C for 10 minutes. Exposure was carried out using a photo mask, and the development of the positive photoresist and the etching of the polyimide precursor were simultaneously performed while immersing and shaking the substrate in a tetramethylammonium hydroxide 2 weight aqueous solution. Thereafter, the positive photoresist was peeled off with methyl cellosolve acetate to form a striped red colored layer pattern in the long side direction. Then, it hardened | cured at 300 degreeC for 30 minutes. The film thickness of the red colored layer was 2.0 µm. In this manner, red pixels were formed in the 1R portion of FIG. 12.

After the substrate was washed with water, green pixels and blue pixels were formed in 1G and 1B portions of FIG. 12 so that the stripe-shaped green and blue colored layer patterns were three micrometers in intervals in the same manner as the red colored layer. All film thicknesses were 2.0 micrometers.

At the time of forming each colored layer pattern, spacers according to the lamination (17R, 17G, 17B) of the dot pattern formed of each colored layer are simultaneously formed on the central portion of the resin black matrix corners (positions 5, 7, and 9 in FIG. 1). However, the design was very difficult because it did not overlap the pixel pattern on the stripe. First, a dot pattern of 12 µm (short side) x 28 µm (long side) and 9 µm (short side) x 25 μm (long side) Formed. Subsequently, a dot pattern of 9 μm (short side direction) × 25 μm (long side direction) and 6 μm (short side direction) × 22 μm (long side direction) of a base formed of a green colored layer was formed thereon. It was laminated. Finally, a dot-shaped pattern of 6 µm (short side direction) × 22 µm (long side direction) and 3 µm (short side direction) × 19 µm (long side direction) at the bottom of the blue colored layer was formed thereon. Formed and laminated. Although the area of the spacer base at the top was about 130 μm ² , the position of the pattern made of the blue colored layer at the top layer was shifted or a pattern defect occurred at the periphery of the display area.

Next, an ITO film having a film thickness of 150 nm and a surface resistance of 20 Ω · cm was formed by sputtering.

In addition, similarly to Example 1, the projection pattern 11 for triangular waveform divisional orientation shown in FIG. 12 was formed.

The cross-section of the projection pattern for division alignment on the pixel had a trapezoid of 12 µm at the bottom and 8 µm at the upper side, and the thickness was 2.0 µm. In this way, a color filter was obtained. In the periphery of the display area, the position of the pattern made up of the blue colored layer of the uppermost layer is shifted or a pattern defect has occurred. Therefore, the height of the spacer, which is the height from the surface of the ITO film provided on the blue pixel to the top of the spacer, is 2.4 to 4.0 μm. 3.9 ± 0.1 μm was not satisfied.

A liquid crystal display device was manufactured in the same manner as in Example 1. Since the spacers were poor at the display periphery, the cell gap was small, the liquid crystal injection time was twice that of Example 1, and the liquid crystal injection properties were poor. In addition, unevenness occurred in the peripheral cell gap, and image quality was poor. In addition, since the transparent electrode is formed on the outermost surface of the spacer, some display defects accordingly occurred through the transparent electrode of the opposing substrate.

Configuration effect Black matrix Spacer Cell gap spot Quality short rescue material rescue Example One 2-color stack and 3-color stack Polyimide Part of projection pattern for split orientation none Good none 2 2-color stack and 3-color stack Polyimide Part of projection pattern for split orientation none Good none 3 2-color stack and 3-color stack Polyimide Same material as the projection for split orientation none Good none 4 3-color overlap Polyimide Blue colored layer spacer + part of protrusion pattern for split orientation none Good none 5 2-color stack Polyimide photoresist Polystyrene none Good none Comparative example One 3-color overlap Polyimide has exist Bad none 2 Resin black matrix Polyimide has exist Bad has exist

Since the liquid crystal display device of the present invention has projections for splitting alignment of liquid crystals, it is possible to achieve a wide viewing angle and to eliminate the process of dispersing the spacers as compared to the conventional split alignment liquid crystal display device. By forming the projections for divisional alignment at the same time and the need for the conventional black matrix, the productivity is excellent and the cost can be reduced. Moreover, since it has the spacer fixedly arrange | positioned on a black matrix, there is no fall of the display quality by light scattering and transmission by a spacer, and its display quality is also excellent. In addition, it is easy to process the pattern, and at the same time, the processing precision is high, and the productivity stability is also excellent because of the high degree of freedom in pattern design and the small number of alignment processes for forming spacers.

Furthermore, by providing a part of the projection pattern for divisional alignment on the color overlap black matrix, it is possible to prevent the color overlap black matrix phase and the alignment of the vicinity thereof from being disturbed.

In addition, when the material forming the divided-orientation projection pattern is electrically insulative, the risk of an electrical short circuit of the electrode substrate facing the transparent electrode on the color filter can be avoided even when the bonding of the substrate occurs.

Claims (11)

On the transparent substrate, a colored layer, a transparent electrode, and a division alignment projection pattern are laminated in order, and a part of the colored layer is formed at the same time, A. The spacer which consists of a part of said division | segmentation projection pattern on the transparent electrode on this black matrix is provided, or B. The color filter which directly provided the transparent electrode and the spacer which consists of the same material as the said pattern for division | dividing orientation on this black matrix. 2. The black matrix according to claim 1, having a black matrix having two colors superimposed on a part of the colored layer and a black matrix having three colors superimposed on a part of the colored layer, and at the same time, a spacer is provided on the black matrix having the three colors superimposed. Color filter. 2. The color filter according to claim 1, wherein the color filter has a black matrix having two colors overlapped at least in part of the colored layer, and at the same time forms a projection pattern for divided alignment on the black matrix. 2. A spacer according to claim 1, wherein a part of the colored layer has a black matrix having two colors superimposed thereon, and at the same time a spacer composed of a third color pattern is formed on the black matrix, and a spacer of A is formed thereon. Color filter to say. The color filter according to claim 1, wherein the shape of the spacer formed as part of the divided alignment projection pattern is at least one of a circle, an ellipse, and a rounded rectangle. The color filter according to claim 1, wherein the material forming the projection pattern for divided orientation is electrically insulating. The color filter according to claim 1, wherein the projection pattern for divisional orientation is made of a positive resist. The color filter according to claim 1, wherein the projection pattern for divisional orientation is made of a material in which a pigment is dispersed in a resin. The color filter of claim 8, wherein the pigment is an insulating white pigment. 10. The color filter according to claim 9, wherein the pigment is selected from titanium oxide, silicon oxide, aluminum oxide, calcium carbonate, magnesium oxide, lead oxide, chromium oxide, iron oxide, zirconia and barium sulfate. The color filter in any one of Claims 1-10 was used, The liquid crystal display device characterized by the above-mentioned.