JP2010085685A - P/v ratio determining method of inkjet ink composition for color filter, method for manufacturing color filter, and liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a P/V (pigment/vehicle) ratio determining method of an ink composition having highly accurate desired chromaticity coordinates in a desired film thickness of a color filter. <P>SOLUTION: The P/V ratio determining method includes processes for: applying an testing ink composition on two or more substrates and film-forming the testing ink composition using a spin coater to obtain films having film thickness different from each other; drying each film-formed film; curing each dried film; drawing two crossing lines on each cured film; performing spectrometry of two or more points selected from four regions divided by the two lines and belonging to different regions in each film; measuring film thickness of an intersection point of the lines of each cured film; calculating a film thickness by which desired chromaticity coordinates can be obtained in a P/V ratio of the testing ink composition from each spectrometry measuring result and film thickness measuring result; and calculating a P/V ratio by which desired chromaticity coordinates in a desired film thickness can be obtained from relations of the P/V ratio of the testing ink composition, the desired chromaticity coordinates and the calculated film thickness. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for determining a P / V ratio of an inkjet ink composition for forming pixels of a color filter, a method for manufacturing a color filter using an ink composition whose composition is set by the method, and a method for manufacturing the color filter. The present invention relates to a liquid crystal display device using a color filter.

In recent years, optical elements such as color liquid crystal display devices and solid-state imaging elements have been rapidly spread. Examples of the color filter which is one of the optical element members include a color filter used for an image output device such as a liquid crystal display device, a color filter used for an image input device such as a solid-state imaging device, and the like.
As a method for forming a colored layer (pixel) of a color filter or the like in a predetermined pattern shape, for example, there is a pigment dispersion method. In this method, a photosensitive resin layer in which a pigment is dispersed is first formed on a substrate, and this is patterned to obtain a monochromatic pattern. Further, by repeating this process three times, colored layers of R, G, and B are formed.
Another method is a staining method. In this dyeing method, first, a water-soluble polymer material, which is a dyeing material, is formed on a glass substrate, patterned into a desired shape by a photolithography process, and then the obtained pattern is immersed in a dyeing bath. To get a colored pattern. By repeating this three times, colored layers of R, G, and B are formed. Still other methods include an electrodeposition method, a method in which a pigment is dispersed in a thermosetting resin, R, G, and B are printed three times, and then the resin is thermoset.

  However, in any method, in order to color three colors of R, G, and B, it is necessary to repeat the same process three times, which causes a problem of high cost, and the yield decreases because the same process is repeated. There is a problem of doing. On the other hand, in the inkjet method, it is possible to form colored layers of each color of R, G, and B in a single process, which can greatly simplify the manufacturing process and achieve a significant cost reduction effect. it can.

The management of the color of the manufactured color filter is generally studied by SDF Standard, FPD Technology Subcommittee, FPD Color Filter Committee, Draft Doc. A method compliant with a method typified by # 2846 “Measurement Method of Color Characteristics of Color Filter” is mainly used. In the measurement method, first, spectroscopic measurement is performed on a reference substrate (a glass substrate generally used in a color filter) serving as a reference for comparison with the transmittance of the colored layer. Next, spectroscopic measurement of the colored layer formed on the reference substrate is performed. The ratio at each wavelength obtained by the measurement is the spectral transmittance. If necessary, the chromaticity coordinates are expressed from the spectral transmittance obtained by the measurement according to standards such as the CIE1931xy chromaticity diagram and the CIE1976L ^* a ^* b ^* color system. In the measurement method, the spectrophotometer has a spectrophotometer having a spectral wavelength range of 380 nm to 780 nm, a wavelength resolution of 10 nm or less, and a measurement spot diameter that can be adjusted to about 2 μm to 50 μm. Yes. Therefore, the measurement spot diameter is 50 μm or less, and usually a range of about 1/40 of the colored layer is measured.

  In order to form a colored layer having a desired color characteristic and a desired film thickness, it is necessary to determine the P / V ratio of the ink for forming the colored layer. A test ink is applied onto a substrate by a spin coating method to form a colored layer having a predetermined thickness, and the color characteristics and thickness at a predetermined P / V ratio are measured by performing spectroscopic measurement of the colored layer. The P / V ratio can be specified from the relationship.

  However, even the colored layer formed by the spin coating method may not have a uniform film thickness, and the spectroscopic measurement result may differ depending on the measurement position (position dependency). A target chromaticity coordinate may not be obtained at a desired film thickness with the P / V ratio calculated and determined based on the evaluation result having the position dependency.

  In addition, in the ink jet method, in order to prevent increase in viscosity or clogging due to evaporation or drying of the solvent during storage of the ink composition or ejection from the ink jet head, unlike the above pigment dispersion method or dyeing method, Often a solvent with a high boiling point or low vapor pressure is used. When such a high boiling point or low vapor pressure solvent is used, conditions such as heating temperature become severe when drying and curing the formed film, and it is difficult to obtain a film with a uniform film thickness. There was also a problem that the target chromaticity coordinates at a desired film thickness could not be obtained with the obtained P / V ratio.

  In view of the above circumstances, the present invention provides a method for determining the P / V ratio of an ink composition that has the simplicity of a spin coating method and provides a target chromaticity coordinate with high accuracy at a desired film thickness. It is an object to provide a color filter and a liquid crystal display device including the color filter.

The first P / V ratio determination method for an ink-jet ink composition for a color filter according to the present invention is such that each test ink composition is applied to two or more substrates, and each test ink composition is applied using a spin coater. Forming a film and obtaining films having different film thicknesses,
Drying each of the films formed,
Curing each dried film,
Drawing two lines intersecting each of the cured films;
A step of performing spectroscopic measurement on each film at two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of each cured film,
From each of the spectroscopic measurement results and the film thickness measurement results, the relationship between the chromaticity coordinates and the film thickness in the P / V ratio of the test ink composition is derived, and from the relationship between the derived chromaticity coordinates and the film thickness, the test is performed. Calculating a film thickness at which a desired chromaticity coordinate is obtained in the P / V ratio of the ink composition for use;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. Including a process.

According to the first method, target chromaticity coordinates at a desired film thickness are obtained by forming a test ink composition on two or more substrates and performing spectroscopic measurement at two or more points on each formed film. Deviation from can be greatly reduced.
The P / V ratio means the weight ratio of the pigment content (P: pigment) to the solid content (V: vehicle) other than the pigment in the ink composition.
In the present invention, the test ink composition is an ink composition used for determining the P / V ratio, and an ink composition having a P / V ratio determined by using the test ink composition. A color filter and a liquid crystal display device having the color filter are manufactured using the object.

  In the first method, in the step of drying the formed films, it is preferable to dry the formed films under reduced pressure from the viewpoint that a film having a uniform film thickness is easily obtained.

  In the first method, the substrate is a substrate having a thickness of 1 to 10 mm, or a substrate in which the total thickness of the glass plate or the metal plate and the substrate is 1 to 10 mm in the drying step, In the drying step, the substrate having the thickness of 1 to 10 mm having the film formed thereon is directly placed on the heating surface of the heating device, or the film formed on the substrate has the film A substrate having a total thickness of 1 to 10 mm between the substrate and the glass plate or the metal plate is placed via the glass plate or the metal plate, and the formed film is dried to obtain a uniform film thickness. It is preferable from the viewpoint of easily obtaining the film.

A second P / V ratio determination method for an ink-jet ink composition for a color filter according to the present invention includes a step of applying a test ink composition to a substrate and forming the test ink composition using a spin coater,
Drying the film formed under reduced pressure,
Curing the dried film;
Drawing two lines intersecting the cured film;
Spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of the cured film;
A step of calculating a film thickness from which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition from the spectroscopic measurement result and the film thickness measurement result;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. Including a process.

  According to the second method, when there is only one substrate to which the test ink composition is applied, the formed film is dried under reduced pressure, and then the dried film is cured, and the cured film By performing spectroscopic measurement at two or more points, deviation from desired chromaticity coordinates in the target film thickness can be reduced.

  In the second method, when there is one substrate to which the test ink composition is applied, the substrate is a substrate having a thickness of 1 to 10 mm, or the glass plate or the metal plate and the substrate in the drying step. The substrate having a total thickness of 1 to 10 mm, and in the drying step, the substrate having the thickness of 1 to 10 mm having the formed film is directly placed on the heating surface of the heating device, or The substrate having the film formed on the substrate and having a total thickness of 1 to 10 mm of the substrate and the glass plate or the metal plate is placed via the glass plate or the metal plate, It is preferable to dry the formed film from the viewpoint of easily obtaining a film having a uniform film thickness.

A third P / V ratio determination method for an ink-jet ink composition for a color filter according to the present invention is a glass plate or a metal plate in a step of drying a substrate having a thickness of 1 to 10 mm or a film formed as a subsequent step. Applying a test ink composition to a substrate having a total thickness of 1 to 10 mm and the substrate, and forming the test ink composition using a spin coater,
The substrate having the thickness of 1 to 10 mm having the formed film is directly placed on the heating surface of the heating apparatus, or the substrate having the formed film is provided on the substrate, and the substrate and the glass plate Alternatively, a step of placing a substrate having a total thickness of 1 to 10 mm with the metal plate via the glass plate or the metal plate, and drying the formed film,
Curing the dried film;
Drawing two lines intersecting the cured film;
Spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of the cured film;
A step of calculating a film thickness from which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition from the spectroscopic measurement result and the film thickness measurement result;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. Including a process.

  According to the third method, when the number of substrates on which the test ink composition is applied is one, the substrate is a substrate having a thickness of 1 to 10 mm, or the film formed in the subsequent step is dried. In the step of applying, the test ink composition is applied to a substrate having a total thickness of 1 to 10 mm of the glass plate or metal plate and the substrate, formed into a film, and then dried, on the heating surface of the heating device. The substrate having the thickness of 1 to 10 mm having the film-formed film is directly placed, or the film-formed film is formed on the substrate, and the total of the substrate and the glass plate or the metal plate A substrate having a thickness of 1 to 10 mm is placed via the glass plate or metal plate, and the formed film is dried to reduce a deviation from a desired chromaticity coordinate in the target film thickness. Can do.

  It is preferable that at least one of the lines is a groove reaching the substrate surface, and the film thickness at the intersection is measured by a stylus type because measurement can be performed easily.

  The method for producing a color filter according to the present invention is a method for producing an ink-jet ink composition for a color filter produced using any one of the first to third P / V ratio determination methods on a transparent substrate by an ink-jet method. A step of dripping and forming a predetermined pattern; and a step of curing the inkjet ink composition for a color filter.

  The liquid crystal display device according to the present invention includes a color filter manufactured by the method for manufacturing a color filter.

  According to the first P / V ratio determination method of the present invention, two or more coating films obtained by applying the same number of test ink compositions as the number of substrates to two or more substrates. By performing spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the intersection of two intersecting lines, an averaged spectroscopic measurement result is obtained and measurement with a large variation The influence of the result on the correlation between the film thickness and the chromaticity is reduced, and the deviation from the target chromaticity coordinates can be reduced at the desired film thickness. According to the second and third P / V ratio determination methods according to the present invention, drying is performed under reduced pressure on a single substrate, a substrate having a specific thickness is used, glass or metal. By setting the thickness of the substrate and the substrate to a specific thickness, a film having a uniform film thickness can be obtained, and deviation from a desired chromaticity coordinate in the target film thickness can be reduced. A liquid crystal display device using a color filter produced using an ink composition having a P / V ratio determined by the first to third P / V ratio determination methods has a very high color reproducibility for white display. It has excellent characteristics.

In order to form a colored layer having a desired color characteristic and a desired film thickness, it is necessary to determine the P / V ratio of the ink for forming the colored layer. A test ink composition is applied onto a substrate by a spin coating method to form a colored layer having a predetermined film thickness, and the color characteristics at a predetermined P / V ratio are obtained by performing spectroscopic measurement of the colored layer. A film thickness relationship can be derived, and the P / V ratio can be specified from the relationship.
However, even the colored layer formed by the spin coating method may not have a uniform film thickness, and the spectroscopic measurement result may differ depending on the measurement position (position dependency). A target chromaticity coordinate may not be obtained at a desired film thickness with the P / V ratio calculated and determined based on the evaluation result having the position dependency.

The present inventors can obtain a highly accurate P / V ratio if the influence on the correlation between the film thickness and the chromaticity can be reduced if the result having the position dependency, that is, the measurement result having large variations, is desired. The first to third P / V ratio determination methods of the present invention to be described later were invented by paying attention to the point that the deviation from the target chromaticity coordinates in the film thickness can be reduced.
That is, in the first P / V ratio determination method, two or more films having different film thicknesses are obtained, and two or more spectroscopic measurements are performed on each film, so that the measurement target (population) is widened and greatly varied. It was possible to reduce the influence of the measurement result on the correlation between film thickness and chromaticity.
Further, in the second and third P / V ratio determination methods, even with a single film, a film having a more uniform film thickness is obtained and spectroscopic measurement at two or more points is performed, thereby reducing the variation itself, and the film thickness. It was possible to reduce the effect on the correlation between color and chromaticity.

Hereinafter, the method for determining the P / V ratio of an inkjet ink composition for a color filter according to the present invention, a method for producing a color filter using the same, a color filter, and a liquid crystal display device will be described in detail.
In the present invention, the P / V ratio means the weight ratio of the pigment content (P: pigment) to the solid content (V: vehicle) other than the pigment in the ink composition.
In the present invention, spectroscopic measurement means microscopic spectrophotometry, and can be measured using, for example, OSP-SP200 manufactured by Olympus Corporation.
In the present invention, the film thickness means the film thickness of a film obtained by forming and curing the ink composition, and the thickness from the substrate-side interface of the film to the interface on the opposite side of the substrate. means.
The chromaticity coordinates can be expressed using various color systems such as the XYZ color system (CIE 1931 standard color system) and the L ^* a ^* b ^* color system (CIE 1976 color system). The color system is not particularly limited, and a necessary one can be selected according to the application. In the following, the standard chromaticity coordinates in the CIE 1931xy chromaticity diagram are used as the chromaticity coordinates.
In the present invention, the test ink composition is an ink composition used for determining the P / V ratio, and an ink composition having a P / V ratio determined by using the test ink composition. A color filter and a liquid crystal display device having the color filter are manufactured using the object.

<P / V ratio determination method>
The first P / V ratio determination method for an ink-jet ink composition for a color filter according to the present invention is such that each test ink composition is applied to two or more substrates, and each test ink composition is applied using a spin coater. Forming a film and obtaining films having different film thicknesses,
Drying each of the films formed,
Curing each dried film,
Drawing two lines intersecting each of the cured films;
A step of performing spectroscopic measurement on each film at two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of each cured film,
From each of the spectroscopic measurement results and the film thickness measurement results, the relationship between the chromaticity coordinates and the film thickness in the P / V ratio of the test ink composition is derived, and from the relationship between the derived chromaticity coordinates and the film thickness, the test is performed. Calculating a film thickness at which a desired chromaticity coordinate is obtained in the P / V ratio of the ink composition for use;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. Including a process.

A second P / V ratio determination method for an ink-jet ink composition for a color filter according to the present invention includes a step of applying a test ink composition to a substrate and forming the test ink composition using a spin coater,
Drying the film formed under reduced pressure,
Curing the dried film;
Drawing two lines intersecting the cured film;
Spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of the cured film;
A step of calculating a film thickness from which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition from the spectroscopic measurement result and the film thickness measurement result;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. Including a process.

A third P / V ratio determination method for an ink-jet ink composition for a color filter according to the present invention is a glass plate or a metal plate in a step of drying a substrate having a thickness of 1 to 10 mm or a film formed as a subsequent step. Applying a test ink composition to a substrate having a total thickness of 1 to 10 mm and the substrate, and forming the test ink composition using a spin coater,
The substrate having the thickness of 1 to 10 mm having the formed film is directly placed on the heating surface of the heating apparatus, or the substrate having the formed film is provided on the substrate, and the substrate and the glass plate Alternatively, a step of placing a substrate having a total thickness of 1 to 10 mm with the metal plate via the glass plate or the metal plate, and drying the formed film,
Curing the dried film;
Drawing two lines intersecting the cured film;
Spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of the cured film;
A step of calculating a film thickness from which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition from the spectroscopic measurement result and the film thickness measurement result;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. Including a process.

  The ink-jet ink composition used in the present invention is for forming a pixel of a color filter, and a pigment and a binder system are essential. The binder system contains a binder component as an essential component, and further contains a pigment dispersant, a dispersion aid, a surfactant, a polymerizable monomer, etc., if necessary, and these components are dissolved or dispersed in a solvent. It is.

As the pigment, any of known organic and inorganic pigments can be selected and used. Organic pigments are preferably used because of their high color developability and high heat resistance.
Examples of the pigment dispersant that can be used include cationic, anionic, nonionic, amphoteric, and silicone surfactants.

The binder system is contained in order to give the pixels film-forming properties and adhesion to the surface to be coated. In the present invention, the binder system is a liquid mixture contained in the ink composition, and has a function of attaching the pixel to a predetermined position.
In order to form a predetermined pattern by the ink jet method, the ink composition can be selectively deposited only on a predetermined pattern formation region and solidified, and the pattern can be formed by performing exposure and development. There is no need to form. Therefore, as the binder system, it is not always necessary to use a photocurable binder resin that can be exposed and developed, and a non-curable film-forming resin such as a thermoplastic resin composition may be used. It is preferable to use a resin because it imparts sufficient hardness to the cured film.

  The solvent is blended to prepare the ink as a high-concentration liquid for storage or ready to be ejected from the head.

  Although it does not specifically limit as a solvent used for the ink for inkjet, From the viewpoint of the discharge stability from an inkjet head, a solvent with a boiling point of 180 degreeC or more is mentioned, The vapor pressure at a boiling point of 180-260 degreeC and normal temperature is 133 Pa (0 0.5 mmHg) or less is the main solvent, and the main solvent is preferably contained in a proportion of 60% by weight or more based on the total amount of the solvent.

  Specific examples of the solvent having a boiling point of 180 to 260 ° C. and a vapor pressure at room temperature of 133 Pa (0.5 mmHg) or less include ethylene glycol monobutyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol dibutyl ether, Examples include diethyl adipate, dibutyl oxalate, dimethyl malonate, diethyl malonate, dimethyl succinate, and diethyl succinate.

  In addition, a leveling agent may be added in order to reduce the bulge at the end of the colored layer.

The first P / V ratio determination method of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of a preferred embodiment of the first P / V ratio determination method in which a test ink composition is applied to two or more substrates, and each test ink composition is applied using a spin coater. It is a schematic diagram explaining the process of forming into a film and obtaining the film | membrane from which a film thickness differs, the process of drying each said film | membrane formed, and the process of hardening | curing each said film | membrane dried.

  In step (i) of FIG. 1, test ink compositions 20a and 20b having the same composition are applied to two or more substrates 10, respectively. Subsequently, in step (ii), the test ink compositions 20a and 20b are formed using a spin coater to obtain films 30a and 30b having different film thicknesses. Subsequently, in step (iii), the heating devices 50 are used to heat and dry the films 30a and 30b to obtain dried films 40a and 40b. Subsequently, in step (iv), post-baking is performed with a heating device or the like, and then post-baking is further performed in a clean oven to obtain cured films 60a and 60b.

  As shown in step (iv) of FIG. 1, a film cured in two stages may be obtained, or although not shown, a film cured by heating in one stage may be obtained.

  By forming a film using a spin coater, the unevenness of the film is reduced and a uniform film can be obtained as compared with the case where the film is formed by the ink jet method, and the position dependency of the spectroscopic measurement value can be reduced.

  In order to obtain films having different film thicknesses, the coating amount of each test ink composition applied to each substrate may be adjusted, film forming conditions such as the spin coater rotation speed may be adjusted, and These may be adjusted in combination.

  When red, green, and blue test ink compositions are applied to a substrate to form a film, the film thickness may be appropriately adjusted for each color.

  As the material of the substrate, a conventionally known material for a spin coater may be used, and examples thereof include NA35 manufactured by NH Techno Glass Co., Ltd.

  The thickness of the substrate is not particularly limited, and for example, a substrate having a thickness of 0.3 to 10 mm can be used. From the viewpoint of workability, the thickness is preferably 0.5 to 5 mm.

  What is necessary is just to set suitably the heating conditions at the time of drying the film | membrane formed into a film according to the composition and coating amount of an ink composition. Examples of the heating device include a hot plate EC-2000 manufactured by AS ONE Corporation.

  There is no restriction | limiting in particular as a method of hardening the dried film | membrane, A conventionally well-known method can be used suitably according to the composition of an inkjet ink composition. For example, heating by a heating device can be mentioned.

  Furthermore, by obtaining a cured film having two or more different film thicknesses, an average value of the measurement results can be obtained, and the influence of large measurement results on the correlation between the film thickness and chromaticity can be reduced. The shift in chromaticity coordinates can be reduced, and the accuracy in determining the P / V ratio can be increased. From the viewpoint of simplification of the procedure and improving accuracy, the number of substrates is preferably 2 to 5, and particularly preferably 3.

As measurement points, two lines are drawn, and two or more spectroscopic measurement points belonging to different areas selected from four areas divided by the two lines are selected. At that time, when there are two measurement points, it is preferable to select two points belonging to regions facing each other across the intersection.
The number of measurement points is preferably 3 points or 4 points, more preferably 4 points, from the viewpoint of reducing the influence of measurement results with large variations on the correlation between film thickness and chromaticity.

  The two lines are not particularly limited as long as the four regions can be divided at arbitrary positions in the film, and it is preferable that the two lines are two grooves from the viewpoint of ease of work.

  The length of the two lines to be created is not particularly limited, but it is preferably 0.5 to 50 mm from the viewpoint of determining the range of the microscopic light measurement in the four areas specified by the two lines to be subsequently performed. . Moreover, it is preferable that a horizontal line is longer than a vertical line.

  Further, the angle at which the two lines intersect is not particularly limited, but it is preferably 45 to 135 °, and particularly preferably 90 °, because the microscopic light measurement is subsequently performed.

  The diameter of the point of microspectroscopy measurement (hereinafter also referred to as a spot) is not particularly limited, but is preferably within 150 μm, more preferably within 50 μm from the point of measuring the vicinity of the intersection of two lines. preferable.

  The measurement position is not particularly limited, but is preferably within a radius of 300 μm from the point of obtaining the measurement result near the intersection where the film thickness is measured to the center of the spot from the intersection of the two lines.

  In addition, when at least one of the lines is a groove reaching the substrate surface, it is preferable from the viewpoint of simplicity of operation that the film thickness at the intersection is measured by a stylus method. When the width of the groove is 100 to 1,000 μm, surface tracing can be performed more appropriately with a measurement probe for stylus measurement, and the width of the groove is preferably 100 to 300 μm.

  FIG. 2 shows a step of forming two grooves intersecting each cured film in an example of a preferred embodiment of the first P / V ratio determination method, two or more points in the vicinity of the intersection of the grooves. FIG. 6 is a schematic diagram for explaining the step of performing the spectroscopic measurement on each film and the step of measuring the film thickness at the intersection of the two grooves, and shows one film for the sake of simplicity of explanation. Step (iv) of FIG. 2 is a plan view of the cured film 60. The diagrams shown in steps (v) and (vi) are enlarged views of the region 80 in the vicinity of the two grooves 71 and 72 in step (iv).

  In step (iv) of FIG. 2, two grooves 71 and 72 are made to intersect each other at an arbitrary position of the cured film 60 obtained by the above-described process. Subsequently, in step (v), microspectroscopy is performed at any two or more points 90 in the vicinity of the intersection of the two intersecting grooves 71 and 72. Subsequently, in step (vi), the film thickness at the intersection of the two grooves 71 and 72 is measured.

  In addition, the width of the two grooves 71 and 72 is not particularly limited, but it is sufficient that the width of one of the grooves 71 and 72 is 100 to 300 μm in the film thickness measurement in the step (vi). It is preferable from the point that a measurement result is obtained.

  In the grooves 71 and 72, at least one depth reaches the substrate 10.

  FIG. 3 is a diagram schematically showing the positions of measurement points for spectroscopic measurement. When there are two measurement points, any combination of the four points 91 to 94 may be used, and two points belonging to regions facing each other across the intersection point, such as 91 and 93 or 92 and 94 It is preferable that Moreover, when there are three measurement points, any combination of the three points 91 to 94 may be used.

In order to measure the film thickness at the intersection of the intersecting grooves 71 and 72 in FIG. 2 (vi), for example, as shown in FIG. 2 (vi), on the line 100 passing through the intersection, Kosaka Co., Ltd. It can be measured by a method such as a stylus using a laboratory-made fine shape measuring machine Surfcorder ET-4000. At this time, the line 100 passes through the intersection of the two grooves 71 and 72, but the angle of the line 100 with respect to the groove is not particularly limited as long as it is not parallel to the grooves 71 and 72. And set it. Further, when one of the two grooves is wide, it is preferable to set the width so as to cross the wider groove from the viewpoint that the measurement result of the groove portion can be stably obtained.
Further, the length of the line 100 is not particularly limited as long as it is longer than the groove, and may be set as appropriate, and is preferably 120 to 5,000 μm from the viewpoint of reducing the influence of variation in the measurement result.

  When steps (iv) to (vi) in FIG. 2 are performed on two or more substrates having different film thicknesses, conditions such as the groove width, length, and position of the number of measurement points are different for each substrate. However, it is preferable that the measurement conditions are the same in order to unify the measurement conditions.

From each spectroscopic measurement result and film thickness measurement result in the first P / V ratio determination method, the relationship between the chromaticity coordinates and the film thickness in the P / V ratio of the test ink composition is derived, and the derived chromaticity. The step of calculating the film thickness from which the desired chromaticity coordinates are obtained in the P / V ratio of the test ink composition from the relationship between the coordinates and the film thickness is preferably performed by the following procedure.
First, an average value of spectral transmittance at each wavelength of a spectral spectrum obtained from two or more spectral measurement results is calculated. Subsequently, chromaticity coordinates (x, y) at the time of a standard C light source are calculated from the spectrum by the standard of the CIE 1931xy chromaticity diagram. Next, the film thickness at which desired chromaticity coordinates are obtained is calculated. Furthermore, it is preferable to calculate the film thickness for obtaining the desired chromaticity coordinates as follows.
Values (x ₁ , d ₁ ), (x ₂ , d ₂ ) for chromaticity coordinates (x) and film thickness (d) obtained by creating a plurality of substrates having two or more different film thicknesses, _.. (X _k , d _k ),..., (X _n , d _n ) and a relational expression d = ax + b between the chromaticity coordinates (x) and the film thickness (d) by the least square method shown in the following formula 1. A and b in (Expression 2) are obtained. (However, the chromaticity coordinates (x _{1 to} x _n ) used for the calculation of the method of least squares use the x coordinate as described above in the case of a red ink composition, and x in the case of green and blue ink compositions. The y coordinate is used instead of the coordinate.) By substituting the desired chromaticity coordinate into x in the relational expression (Equation 2) between the chromaticity coordinate and the film thickness thus obtained, the desired chromaticity coordinate is obtained. The resulting film thickness is calculated.

  In the first P / V ratio determination method, the desired chromaticity coordinates are determined from the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness. The step of calculating the P / V ratio obtained in the thickness is, for example, the desired pigment based on the pigment concentration (%) of the test ink composition and the ratio of the film thickness used for the measurement with respect to the calculated film thickness value. The concentration (%) is calculated, and the P / V ratio is calculated from the desired pigment concentration.

  In the first P / V ratio determination method, in the step of drying each film formed film, it is preferable to dry each film formed under reduced pressure. This makes it easier to obtain a film with a more uniform film thickness because the solvent is dried more uniformly than when the film formed under normal pressure is dried. The more uniform the film, the less bias the measurement results at the measurement position, and the less spectroscopic measurement results and film thickness measurement results will be obtained, and the deviation from the target chromaticity coordinates at the desired film thickness will be reduced. it can.

  The drying conditions under reduced pressure may be set according to the composition of the test ink composition, the solvent, and the like. For example, the pressure is preferably 200 Torr or less, more preferably 150 Torr or less. The temperature is preferably 50 to 120 ° C, more preferably 70 to 100 ° C. The time is preferably 5 minutes or more, more preferably 10 to 20 minutes.

  In the first P / V ratio determination method, the substrate is a substrate having a thickness of 1 to 10 mm, or the total thickness of the glass plate or the metal plate and the substrate in the drying step is 1 to 10 mm. In the drying step, the substrate having the thickness of 1 to 10 mm having the formed film is directly placed on the heating surface of the heating device, or the film is formed on the substrate. A substrate having a film and having a total thickness of 1 to 10 mm of the substrate and the glass plate or the metal plate is placed via the glass plate or the metal plate, and the formed film is dried. However, it is preferable because a film having a uniform film thickness is easily obtained.

That is, as shown in the schematic diagram of FIG. 4, after the test ink composition 20 is applied to the substrate 11 having a thickness of 1 to 10 mm and formed, the formed film 30 and the substrate 11 are heated by the heating device 50. Directly placed on the surface, the film 30 is dried to form a dried film 40, or as shown in the schematic diagram of FIG. 5, the thickness of the substrate 12 and the glass plate or metal plate 110 in step (i) A substrate 12 having a thickness of 1 to 10 mm and a glass plate or metal plate 110 are prepared, and the test ink composition 20 is applied to the substrate 12 to form a film, and then the substrate 12 having the film 30 formed. Is placed on the heating surface of the heating device 50 via a glass plate or metal plate 110 and the film 30 is dried, or as shown in the schematic diagram of FIG. 6, in step (ii) the substrate 12 and the glass plate or The total thickness of the metal plate 110 is 1 to 10 mm. In step (i), the test ink composition 20 is applied to the substrate 12 having a thickness as follows. In step (ii), a glass plate or a metal plate 110 is disposed on the lower side of the substrate 12, and film formation is performed in step (iii). After that, the substrate 12 having the film 30 formed on the heating surface of the heating device 50 in the step (iv) is placed via the glass plate or the metal plate 110 and the film 30 is dried, or FIG. As shown in the schematic diagram, the ink composition 20 for testing in the step (i) is formed on the substrate 12 having a thickness in which the total thickness of the substrate 12 and the glass plate or the metal plate 110 is 1 to 10 mm in the step (iii). Is applied, and in step (ii), a glass plate or a metal plate 110 is disposed on the lower side of the substrate 12 in step (iii), and film formation is performed on the heating surface of the heating device 50 in step (iv). The substrate 12 having the film 30 is a glass plate or Placed through the genus plate 110, to dry the film 30, easily obtained cured film having a uniform thickness, from the viewpoint of reducing the deviation of the chromaticity coordinates of the target film thickness.
When a glass plate or a metal plate is used, if the substrate having the film is placed on the heating device via the glass plate or the metal plate before the formed film is dried, the glass plate or the metal plate is used as the substrate. There is no particular limitation on the timing when the ink is disposed on the lower side, and it may be before the test ink composition is applied to the substrate as shown in FIG. 5, or after the test ink composition is applied to the substrate as shown in FIG. It may be before film formation, or after film formation as shown in FIG. 7 and before drying.
The reason for obtaining a film with a uniform film thickness is not clear, but by increasing the thickness of the substrate itself or by placing a glass plate or metal plate between the substrate and the heating device, the film is directly placed on the heating device. It is assumed that the heat from the heating device is gently and uniformly transmitted to the substrate, and the film on the substrate is heated and cured as compared with the case where a thin substrate is disposed.
The placement and arrangement described above may be either a state where the glass plate or the metal plate is bonded to the substrate and the heating device or a state where it is not bonded.

  The first P / V ratio determination method includes a step of curing each film formed under reduced pressure, and the substrate is a substrate having a thickness of 1 to 10 mm, or a glass plate or a metal in the drying step. The total thickness of the plate and the substrate is 1 to 10 mm. In the drying step, the substrate having the thickness of 1 to 10 mm having the formed film is directly formed on the heating surface of the heating device. Place the substrate having the film formed on the substrate or having the total thickness of the substrate and the glass plate or the metal plate through the glass plate or the metal plate. 4 and FIG. 7 in addition to drying each film formed under reduced pressure. Containing a uniform film thickness More preferable from the point.

A second P / V ratio determination method will be described.
Whereas the first P / V ratio determination method has two or more substrates on which the test ink composition is applied, the second P / V ratio determination method requires a substrate on which the test ink composition is applied. One film and the film formed under reduced pressure are dried. That is, the film is dried under reduced pressure in the step (iii) of FIG.
From the above number of target substrates, the drying conditions under reduced pressure, and the spectroscopic measurement results and the film thickness measurement results described later, the film thickness at which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition is calculated. Except for the steps, the P / V ratio can be determined by performing each step in the same manner as in the first P / V ratio determination method.

  In the second P / V ratio determination method, from the spectroscopic measurement result and the film thickness measurement result, the step of calculating the film thickness at which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition is spectroscopic. The chromaticity coordinates are calculated using the following formulas (3) to (8) from the measurement result and the standard of the CIE 1931xy chromaticity diagram, and the chromaticity coordinates and τ (λ) in the formulas (3) to (5) satisfy From Equation (9), the film thickness at which a desired chromaticity coordinate is obtained is calculated. Where τ (λ) is the spectral transmittance of the spectral measurement result, d is the film thickness of the film thickness measurement result, and P (λ) is the spectral spectrum of the light source.

  Also in the second P / V ratio determination method, the substrate is a substrate having a thickness of 1 to 10 mm, or the total thickness of the glass plate or the metal plate and the substrate in the drying step is 1 to 10 mm. In the drying step, the substrate having the thickness of 1 to 10 mm having the formed film is directly placed on the heating surface of the heating device, or the film is formed on the substrate. A substrate having a film and having a total thickness of 1 to 10 mm of the substrate and the glass plate or the metal plate is placed via the glass plate or the metal plate, and the formed film is dried. However, it is preferable because it is easy to obtain a film having a uniform film thickness and the shift in chromaticity coordinates in the target film thickness can be reduced.

A third P / V ratio determination method will be described.
Whereas the first P / V ratio determination method has two or more substrates on which the test ink composition is applied, the third P / V ratio determination method requires a substrate on which the test ink composition is applied. In one substrate and a substrate having a thickness of 1 to 10 mm, or a substrate in which the total thickness of the glass plate or the metal plate and the substrate is 1 to 10 mm in the step of drying the formed film as a subsequent step Applying a test ink composition and forming the test ink composition using a spin coater;
The substrate having the thickness of 1 to 10 mm having the formed film is directly placed on the heating surface of the heating apparatus, or the substrate having the formed film is provided on the substrate, and the substrate and the glass plate Or the board | substrate which is 1-10 mm in total thickness with a metal plate is mounted through the said glass plate or a metal plate, and the process which dries the said formed film is included. That is, instead of steps (i) to (iii) in FIG. 1, steps (i) to (iii) in FIG. 4 or steps (i) to (iv) in FIGS. The first P / V ratio is the same as the first P / V ratio, except that the step of calculating the film thickness from which the desired chromaticity coordinates are obtained in the P / V ratio of the test ink composition is performed from the spectroscopic measurement result and the film thickness measurement result The P / V ratio can be determined by performing each step in the same manner as the determination method.

  In the third P / V ratio determination method, from the spectroscopic measurement result and the film thickness measurement result, the step of calculating the film thickness at which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition is as follows. Similarly to the second P / V ratio determination method, the desired chromaticity in the P / V ratio of each color test ink composition is determined from the spectroscopic measurement results and the film thickness measurement results using the above formulas (3) to (9). It is preferable to calculate the film thickness at which the coordinates are obtained.

  According to the first to third P / V ratio determination methods of the present invention, the boiling point of the solvent contained in the test ink composition is 180 to 260 in consideration of ejection stability from the inkjet head. Even in the case where the vapor pressure at a normal temperature is 133 Pa (0.5 mmHg) or less, a film having a uniform film thickness is easily obtained. Usually, in a test ink composition using a solvent having such a boiling point, since the heating temperature is high, the uniformity of the film is lowered, and the position dependency of the measurement result is increased. The shift of chromaticity coordinates becomes large. On the other hand, by using the first to third P / V ratio determination methods of the present invention, by calculating an average value from a plurality of measurement results, the position dependency of the measurement results can be reduced. Therefore, the target chromaticity coordinates at a desired film thickness can be obtained with high accuracy, particularly in the solvent having the boiling point as described above.

<Color filter>
The color filter of the present invention is manufactured by the method for manufacturing a color filter according to the present invention, which will be described later, and includes a structure, a pixel, a black matrix layer, a protective film, a spacer provided as necessary, and a transparent electrode film For the structural members such as and other layers, conventionally known members can be used.
Hereinafter, each component will be described.

(Transparent substrate)
The transparent substrate constituting the color filter of the present invention is not particularly limited as long as it is conventionally used for a color filter. For example, quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate, etc. A transparent rigid material having no flexibility, or a transparent flexible material having flexibility such as a transparent resin film or an optical resin plate can be used. Among them, Corning 7059 glass is a material having a small coefficient of thermal expansion, excellent dimensional stability and workability in high-temperature heat treatment, and is an alkali-free glass containing no alkali component in the active matrix. Suitable for color filters for color liquid crystal display devices. In the present invention, a transparent substrate is usually used, but a reflective substrate or a white colored substrate can also be used. Moreover, you may use the board | substrate which surface-treated for the purpose of alkali elution prevention, gas-barrier provision, and other purposes as needed.

(Pixel)
The pixels constituting the color filter of the present invention are formed of three colors of red (R), green (G), and blue (B). The coloring pattern shape in the pixel can be a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type, and the coloring area can be arbitrarily set.

(Black matrix layer)
The black matrix layer is provided in order to improve the contrast of a display image. However, when a color filter by an ink jet method is formed, it also serves as a partition for partitioning each pixel.

When a metal thin film is formed as the black matrix layer, it can be formed by patterning the thin film in a line shape. As the patterning method, a normal patterning method such as a sputtering method or a vacuum deposition method can be used.
Further, as a black matrix layer, when forming a layer containing light-shielding particles such as carbon fine particles, metal oxides, inorganic pigments, organic pigments in a resin binder, as a patterning method, a photolithography method, A generally used method such as a printing method can be used. Or you may form using an inkjet system similarly to a pixel.

(Protective film)
The protective film is provided to flatten the surface of the color filter and to prevent components contained in the pixels in the liquid crystal display device from eluting into the liquid crystal layer. The protective film is coated with a known negative-type photocurable transparent resin composition or thermosetting transparent resin composition so as to cover the black matrix layer and the pixels by a method such as spin coater, roll coater, spray, printing, etc. It can be formed by curing with light or heat.

(Spacer-)
A plurality of spacers are provided in a non-display area on the substrate in order to maintain a cell gap when the color filter is bonded to a liquid crystal driving side substrate such as a TFT array substrate. The shape and dimensions of the spacer are not particularly limited as long as the spacer can be selectively provided in a non-display area on the substrate and a predetermined cell gap can be maintained over the entire substrate. Columnar spacers or spherical spacers can be used. The height, formation density, etc. of the spacer can be appropriately set in consideration of the thickness unevenness of the liquid crystal layer, the aperture ratio, the shape of the spacer, the material, etc. For example, one of each pixel of red, green and blue Necessary and sufficient spacer function is expressed at a ratio of one per group. The shape of the columnar spacer may be a columnar shape, and may be, for example, a columnar shape, a prismatic shape, a truncated cone shape, or the like.

  The columnar spacer is applied, for example, by applying a coating liquid of the curable resin composition directly on the transparent substrate by a method such as a spin coater, a roll coater, spraying, printing or the like, or through another layer such as a transparent electrode, Dry to form a curable resin layer. Usually, a photocurable ink-jet ink is preferably used as the ink-jet ink for forming the spacer. Next, the resin layer is exposed through a photomask for columnar spacers and developed with a developer such as an alkaline liquid. Then, a predetermined columnar pattern is formed, and this columnar pattern is heated (post-baked) in a clean oven or the like as necessary to form a columnar spacer.

  The columnar spacer can be provided directly on the color filter or indirectly through another layer. For example, a transparent electrode such as ITO or a protective film may be formed on the color filter, and a columnar spacer may be formed thereon, or a protective film and a transparent electrode may be formed on the color filter in this order, and further on the transparent electrode Columnar spacers may be formed on the substrate.

(Transparent electrode film)
The transparent electrode film can be formed using indium tin oxide (ITO), zinc oxide (ZnO), tin oxide (SnO), or an alloy thereof.

(Other layers)
Other members that are usually formed in the color filter may be further included. The alignment film and other members can be formed by a usual method using those usually used for color filters.

<Color filter manufacturing method>
In the color filter manufacturing method according to the present invention, a color filter ink-jet ink composition produced by using the P / V ratio determination method is dropped on a transparent substrate by an ink-jet method to form a predetermined pattern. And a step of curing the inkjet ink composition for a color filter.

(Preparation of inkjet ink composition)
The ink-jet ink composition used in the present invention comprises components such as a pigment, a binder component, a pigment dispersant, a dispersion aid, a surfactant, a polymerizable monomer, a filler, an adhesion promoter, a leveling agent, and an aggregation inhibitor. It may be produced by adding to a solvent and mixing to dissolve or disperse the solid component.
However, when the pigment is directly put into the whole solvent together with other components such as a binder component and stirred and mixed, the pigment cannot often be sufficiently dispersed in the solvent. Therefore, usually, a solvent having good dispersibility and dispersion stability of the pigment is prepared, and a pigment corresponding to the P / V ratio determined by the above P / V ratio determination method is added together with a dispersant to a dissolver or the like. To prepare a pigment dispersion. Then, the obtained pigment dispersion is put into a solvent together with components other than the pigment corresponding to the P / V ratio obtained by the above P / V ratio determination method, and sufficiently stirred and mixed with a dissolver or the like. Thus, an inkjet ink composition can be obtained.

  As the remaining solvent into which the pigment dispersion is charged, an inkjet ink having a composition obtained by subtracting the amount of the solvent used for preparing the pigment dispersion from the final composition of the entire solvent is diluted to the final concentration. The composition may be completed. Alternatively, a high-concentration inkjet ink composition may be prepared by introducing the pigment dispersion into a relatively small amount of solvent. The high-concentration inkjet ink composition can be stored as it is and diluted to the final concentration just before use and used in the inkjet method.

The process of dropping the inkjet ink composition prepared as described above onto a transparent substrate by an inkjet method to form a predetermined pattern is not particularly limited, and a conventionally known method can be used. A specific example of this process will be described with reference to FIG.
First, as shown in FIG. 8A, the transparent substrate 120 of the color filter 190 is prepared.
A conventionally known substrate can be used as the transparent substrate 110.

Next, as shown in FIG. 8B, a black matrix layer 130 is formed in a region serving as a boundary between pixel portions on one surface side of the transparent substrate 120.
The black matrix layer 130 is a partition wall for adhering ink to a predetermined area, and is provided so as to surround each pixel and outside the pixel formation area, whereby the contrast of the display image can be improved.

  Next, the inkjet ink composition is selectively attached to a predetermined region on the transparent substrate 120 by an inkjet method to form a colored layer (hereinafter also referred to as an ink layer). Since the inkjet method is used, productivity is higher than conventional photolithography methods and the like, and cost reduction and yield improvement can be realized.

  First, ink jet ink compositions prepared using the P / V ratio determination method according to the present invention, in which pigments of red (R), green (G), and blue (B) are blended, are prepared. Then, as shown in FIG. 8 (C), the pixel forming ink jets corresponding to the color pixel forming regions 150R, 150G, and 150B defined by the pattern of the black matrix layer 130 on the surface of the transparent substrate 120. The ink composition is selectively deposited by an ink jet method to form an ink layer. The ink layer is formed so that a red pattern, a green pattern, and a blue pattern are arranged in a desired form such as a mosaic type, a stripe type, a triangle type, or a four-pixel arrangement type. Since the inkjet ink for forming pixels of each color can be simultaneously sprayed onto the substrate using a plurality of heads 140, the working efficiency can be improved as compared with the case where the pixel portion is formed for each color by a method such as printing. it can.

  The ink layer formed in FIG. 8C is cured to form pixels. As shown in FIG. 8D, the ink layers 160R, 160G, and 160B of the respective colors are pre-baked under conventionally known conditions such as drying under reduced pressure, and then cured by appropriate exposure and / or heating. When the ink layer is appropriately exposed and / or heated, the ink layer is cured and the pixels 170R, 170G, and 170B are formed by the crosslinking reaction of the binder component contained in the inkjet ink composition.

Next, as shown in FIG. 8E, a protective film 180 is formed on the side of the transparent substrate on which the pixels 170R, 170G, and 170B are formed.
The protective film 180 is provided to flatten the surface of the color filter and to prevent the components contained in the pixels from eluting into the liquid crystal layer. The protective film 180 is formed by applying a known negative-type photocurable resin composition or thermosetting resin composition so as to cover the black matrix layer and the pixels by a method such as spin coater, roll coater, spray, or printing. It can be formed by curing with light or heat.
In others, it can manufacture using the method similar to the method of forming a normal color filter.

<Liquid crystal display device>
Next, the liquid crystal display device of the present invention will be described.
The liquid crystal display device according to the present invention includes a color filter manufactured by the above-described method for manufacturing a color filter. According to the present invention, by using the color filter, it is possible to provide a high-quality liquid crystal display device that is very excellent in color reproducibility of white display.

The liquid crystal display device of the present invention is not particularly limited as long as it has the above-described color filter, and may be a known liquid crystal display device. Specifically, IPS (In-Plane Switching) type, STN (Super Twisted Nematic) type, TN (Twisted Nematic) type, ferroelectric type, antiferroelectric type, MVA mode type and the like can be mentioned.
The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and that exhibits the same effects. Are included in the technical scope.

Hereinafter, the present invention will be described more specifically with reference to examples. These descriptions do not limit the present invention.
In the final color filter, the red color filter has a chromaticity coordinate: x = 0.552 and a film thickness of 1.70 μm, and the green color filter has a chromaticity coordinate: y = 0.600, a film thickness. The target was 1.70 μm, and the blue color filter was targeted for chromaticity coordinates: y = 0.095 and a film thickness of 1.90 μm.
The weight average molecular weight is a value in terms of polystyrene measured by GPC (gel permeation chromatography).
The names and abbreviations of the compounds used in the examples are shown below.
BCA: Diethylene glycol monobutyl ether acetate (also known as butyl carbitol acetate EEP: ethyl 3-ethoxypropionate GMA: glycidyl methacrylate MMA: methyl methacrylate perbutyl O (trade name, manufactured by NOF Corporation): t-butylperoxy-2- Ethyl hexanoate PR254: CI Pigment Red 254
PR177: C.I. I. Pigment Red 177
PY150: C.I. I. Pigment Yellow 150
PG36: C.I. I. Pigment Green 36
PB15: 6: C.I. I. Pigment Blue 15: 6
PV23: C.I. I. Pigment Violet 23

Production Example 1: Synthesis of Binder Epoxy Compound 40.7 wt% of solvent BCA containing no hydroxyl group was added to a four-necked flask equipped with a thermometer, a reflux condenser, a stirrer, and a dropping funnel according to the blending ratio shown in Table 1. The mixture was charged and heated with stirring to 140 ° C. Subsequently, a mixture of 10 parts by weight of GMA, 40 parts by weight of MMA, and 4.7 parts by weight of perbutyl O (polymerization initiator) as dropping components was dropped at a constant rate from a dropping funnel over 2 hours at a temperature of 140 ° C. After dropping, the temperature was lowered to 110 ° C., a mixture of 0.3 parts by weight of perbutyl O and 4.3 parts by weight of BCA was added as an additional catalyst component, and the reaction was terminated when the temperature at 110 ° C. was maintained for 2 hours. A binder epoxy compound (GMA-MMA copolymer) having a polymerization ratio of GMA: MMA = 20: 80 and a weight average molecular weight of 20,000 was obtained.

Production Example 2: Preparation of Pigment Dispersion Solution Each pigment, pigment dispersant (Disperbyk 161 and Disperbyk 2000, both manufactured by Big Chemie Japan Co., Ltd.), and a solvent were mixed at a ratio shown in Table 2, and each had a diameter of 0.3 mm. Add 500 parts by weight of zirconia beads and disperse for 4 hours using a paint shaker (manufactured by Asada Tekko Co., Ltd.). PR254 pigment dispersion, PR177 pigment dispersion, PY150 pigment dispersion, PG36 pigment dispersion, PB15: 6 pigment A dispersion and a PV23 pigment dispersion were prepared.

Production Example 3: Preparation of Thermosetting Binder Component A Teflon (registered trademark) -coated rotor was placed in a sample bottle and placed on a magnetic stirrer. In this sample bottle, according to the ratio shown in Table 3, the binder epoxy compound (BCA solution with a solid content of 30% by weight) obtained in Production Example 1 and a polyfunctional epoxy resin (trade name Epicoat 154, Japan Epoxy Resin) (Made by Co., Ltd.) and the like were sufficiently stirred and dissolved at room temperature, and then a diluent was added to stir and dissolve to adjust the viscosity, followed by filtration to obtain a thermosetting binder component.

Production Example 4: Preparation of Test Inkjet Ink Composition With the blending ratio shown in Table 4, the PR254 pigment dispersion, the PR177 pigment dispersion, the PY150 pigment dispersion, the binder composition, and the solvent prepared in Production Example 2 above And a test red inkjet ink composition was prepared. Similarly, a test green inkjet ink composition and a test blue inkjet ink composition were obtained at the blending ratios shown in Table 4.

  In addition, Table 5 shows the blending ratio of each component in each color test inkjet ink composition. Also, from Table 5, the pigment, the solid content (vehicle) other than the pigment, and the P / V ratio (pigment / vehicle) of each test ink-jet ink composition are the values shown in Table 6.

-Preparation of coating film by spin coating method (Example 1-1)
Procedure I
Three glass substrates having a thickness of 0.7 mm (100 mm × 100 mm, manufactured by NH Techno Glass Co., Ltd., NA35) were prepared, and each test red inkjet ink composition prepared in Production Example 4 was prepared on each substrate. 2 g each was dropped, and the following 1. ~ 3. These steps were sequentially performed, and a coating film having a film thickness of 1.81 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 900 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm in 2 seconds For the second substrate, see 2. Except for changing the rotation speed to 1000 rpm, the steps 1 to 3 were sequentially performed in the same manner as the first substrate to form a coating film having a thickness of 1.64 μm.
For the third substrate, see 2. above. Except for changing the rotation speed to 1100 rpm, the steps 1 to 3 were sequentially performed in the same manner as the first substrate to form a coating film having a thickness of 1.50 μm.

Step II
Each coating film formed as described above was prebaked for 10 minutes on a 90 ° C. hot plate together with the glass substrate and dried.

Step III
Further, each dried film was post-baked by heating at 200 ° C. for 30 minutes on a hot plate together with the glass substrate, and each coating film was further heated at 240 ° C. for 30 minutes in a clean oven for post-baking. The first colored layer, the second colored layer, and the third colored layer were formed.

Procedure IV
For each colored layer formed as described above, using a cutter, a line having a line width of about 300 μm is 3 mm in length and 10 mm in width so that the vertical and horizontal lines intersect at almost right angles, and the substrate surface is completely exposed. Pulled on.

Procedure V
Using the OSP-SP200 manufactured by Olympus Corporation, perform spectroscopic measurement of only the substrate as a reference, and then, for each colored layer, select one point each from the four regions divided by the vertical and horizontal lines, A total of four points (n = 1 to 4 in the clockwise direction) were subjected to spectroscopic measurement. At this time, the diameter of the measurement spot was 50 μm, and the distance from the intersection of the vertical and horizontal lines to the center of the measurement spot was 100 μm. The spectral transmittance (%) at each wavelength of the obtained first to third colored layers and the average value of the spectral transmittance of each colored layer were determined.

Procedure VI
About said 1st-3rd colored layer, using a stylus type film thickness measuring device (product made from Kosaka Laboratory, SURFCORDER ET 4000L), it passes through the intersection of the above-mentioned vertical line and horizontal line, and it is a film with a measurement length of 2 mm Thickness measurement was performed. Table 7 shows the film thickness measurement results for the first to third colored layers.

Procedure VII
Using the results in Table 7, a and b in the relational expression d = ax + b between chromaticity coordinates and film thickness were calculated by the least square method shown in the above equation 1. As a result, a = 17.773 and b = −9.8413, and a relational expression between chromaticity coordinates and film thickness, d = 17.773x−9.8413 was obtained. Table 8 shows a graph of this equation. From the relational expression of chromaticity coordinates and film thickness, d = 17.773x−9.8413, the film thickness when the target chromaticity coordinates x = 0.652 was determined to be 1.75 μm. The results are shown in Table 11 together with the green test inkjet ink composition and the blue test inkjet ink composition.

Procedure VIII
The pigment concentration (%) in the total solid content of the test red inkjet ink composition of Table 6 is {pigment weight% / (pigment weight% + solid content weight% other than pigment)} × 100, 7.50 / It was (7.5 + 12.5) × 100 = 37.5 (%).
In order to obtain a colored layer having a desired film thickness of 1.70 μm, the magnification ratio of the colored layer to the desired film thickness was determined. The film thickness magnification was 1.75 / 1.70 = 1.02941 from the film thickness / desired film thickness of the colored layer serving as the target chromaticity coordinates obtained in Procedure VII.
The pigment concentration (%) for obtaining a desired chromaticity coordinate is 37.5 × 1.02941 = 38.602875 (%) from the pigment concentration × film thickness magnification in the total solid content of the test ink-jet ink composition. Met.
Therefore, the P / V ratio of the red inkjet ink composition for obtaining a colored layer having a desired chromaticity coordinate at a desired film thickness of 1.70 μm is pigment / vehicle, that is, pigment / (total solids-pigment). As a result, 38.602875 / (100−38.602875) = 0.63.

(Example 1-2)
In Example 1-1, instead of 2 g of the red test ink-jet ink composition, 2 g of the green test ink-jet ink composition prepared in Production Example 4 was used. Procedures I to VIII were carried out in the same manner except that the number of revolutions in step 950 was 950 rpm, 1050 rpm, and 1100 rpm, and the film thicknesses were 1.85 μm, 1.67 μm, and 1.52 μm.
Table 7 shows the film thickness measurement results for the first to third colored layers obtained in Procedure VI.
In the procedure VII, the obtained relational expression between the chromaticity coordinates and the film thickness is d = 2.354x-11.142. Table 9 shows a graph of this expression. From this equation, the film thickness when the target chromaticity coordinate y = 0.600 was calculated to be 1.67 μm. Table 11 shows the film thicknesses at which desired chromaticity coordinates can be obtained at the calculated P / V ratio of the green ink jet ink composition.
In Procedure VIII, the P / V ratio of the green inkjet ink composition for obtaining a colored layer having a desired chromaticity coordinate at a desired film thickness of 1.70 μm was 0.81.

(Example 1-3)
In Example 1-1, instead of 2 g of the red test ink-jet ink composition, 2 g of the blue test ink-jet ink composition prepared in Production Example 4 was used. Procedures I to VIII were carried out in the same manner except that the number of revolutions in the procedure was 700 rpm, 800 rpm, and 900 rpm, and the film thicknesses were 2.03 μm, 1.89 μm, and 1.64 μm.
Table 7 shows the film thickness measurement results for the first to third colored layers obtained in Procedure VI.
In the procedure VII, the obtained relational expression between the chromaticity coordinates and the film thickness is d = −36.722x + 5.4342. Table 10 shows a graph of this expression. From this equation, the film thickness when the target chromaticity coordinate y = 0.095 was calculated to be 1.93 μm. Table 11 shows the film thicknesses at which the desired chromaticity coordinates can be obtained at the calculated P / V ratio of the blue ink jet ink composition.
In Procedure VIII, the P / V ratio of the blue inkjet ink composition for obtaining a colored layer having a desired chromaticity coordinate at a desired film thickness of 1.90 μm was 0.47.

An ink-jet ink composition for a color filter is prepared based on the P / V ratio determined in Example 1, and a color filter is prepared by the ink-jet ink method (the thickness of each of the red, green, and blue colored layers is 2). Table 12 shows the results of evaluating the display performance.
In addition, display performance uses the produced color filter as a sample detection area width of 4 mm and height of 11 mm using a wide-area spectroscopic device (trade name: spectrophotometer UV-3100PC, manufactured by Shimadzu Corporation), and a visible wavelength range. Spectral transmission spectrum measurement of (400 to 700 nm) is performed, (x, y) based on the XYZ color system, luminance Y is calculated, target chromaticity coordinates (x = 0.3042, y = 0.3309, C light source ) Was evaluated as follows according to the error (Δx, Δy).
A (Excellent and Good): Δx ≦ ± 0.001 and Δy ≦ ± 0.002
○ (Good): Δx ≦ ± 0.002 and Δy ≦ ± 0.003
X (defect): Δx> ± 0.002 and Δy> ± 0.003

(Example 2-1)
In Example 1-1, procedures I to VIII were performed in the same manner except that procedure II was performed as follows.
Step II
Each coating film formed as described above was placed on a 90 ° C. hot plate together with the glass substrate, sealed with a lid, and then pre-baked for 10 minutes while being reduced to a pressure of 150 torr by a pump and dried.

(Example 2-2)
In Example 1-2, Procedures I to VIII were similarly performed except that Procedure II was performed as in Example 2-1.

(Example 2-3)
In Examples 1-3, Procedures I to VIII were similarly performed except that Procedure II was performed as in Example 2-1.

(Example 3-1)
In Example 1-1, procedures I to VIII were performed in the same manner except that procedure II was performed as follows.
Step II
Each coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NA Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates. (Coating film + glass substrate + glass substrate) was placed on a 90 ° C. hot plate, pre-baked for 10 minutes and dried.

(Example 3-2)
In Example 1-2, Procedures I to VIII were similarly performed except that Procedure II was performed as in Example 3-1.

(Example 3-3)
In Examples 1-3, Procedures I to VIII were similarly performed except that Procedure II was performed as in Example 3-1.

(Example 4-1)
In Example 1-1, procedures I to VIII were performed in the same manner except that procedure II was performed as follows.
Step II
Each coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NA Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates. (Coating film + glass substrate + glass substrate) was placed on a hot plate at 90 ° C. and sealed with a lid, and then prebaked for 10 minutes while being reduced to a pressure of 150 torr by a pump and dried.

(Example 4-2)
Procedures I to VIII were carried out in the same manner as in Example 1-2, except that Procedure II was carried out as in Example 4-1.

(Example 4-3)
In Examples 1-3, Procedures I to VIII were similarly performed except that Procedure II was performed as in Example 4-1.

(Example 5-1)
In Example 2-1, Procedures I to VIII were similarly performed except that Procedure I, Procedure II, and Procedure VII were performed as follows.
Procedure I
Prepare a glass substrate (NH35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm and dropping 2 g of the test red inkjet ink composition prepared in Production Example 4 on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.64 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 1000 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm for 2 seconds Procedure II
The coating film formed as described above was placed on a 90 ° C. hot plate together with the glass substrate, sealed with a lid, and then pre-baked for 10 minutes while being reduced by a pump to a pressure of 150 torr and dried.
Procedure VII
From the spectroscopic measurement results and the film thickness measurement results obtained up to Procedure VI, the film thickness at which desired chromaticity coordinates were obtained was calculated using the above formulas (3) to (9).

(Example 5-2)
In Example 2-2, procedures I to VIII were performed in the same manner except that procedure I, procedure II, and procedure VII were performed as follows.
Procedure I
Prepare a glass substrate (NH Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm, and 2 g of the test green inkjet ink composition prepared in Production Example 4 was dropped on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.67 μm was formed by spin coating.
1. Rotate for 3 seconds at 50 rpm 2. Rotate for 2 seconds at 1050 rpm 3. Stop after decelerating to 150 rpm for 2 seconds Procedure II
The coating film formed as described above was placed on a 90 ° C. hot plate together with the glass substrate, sealed with a lid, and then pre-baked for 10 minutes while being reduced by a pump to a pressure of 150 torr and dried.
Procedure VII
From the spectroscopic measurement results and the film thickness measurement results obtained up to Procedure VI, the film thickness at which desired chromaticity coordinates were obtained was calculated using the above formulas (3) to (9).

(Example 5-3)
In Example 2-3, procedures I to VIII were performed in the same manner except that procedure I and procedure II were performed as follows.
Procedure I
Prepare a 100 mm × 100 mm glass substrate (NA Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm, and drop 2 g of the test blue inkjet ink composition prepared in Production Example 4 on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.89 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 800 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm in 2 seconds Procedure II
The coating film formed as described above was placed on a 90 ° C. hot plate together with the glass substrate, sealed with a lid, and then pre-baked for 10 minutes while being reduced by a pump to a pressure of 150 torr and dried.
Procedure VII
From the spectroscopic measurement results and the film thickness measurement results obtained up to Procedure VI, the film thickness at which desired chromaticity coordinates were obtained was calculated using the above formulas (3) to (9).

(Example 6-1)
In Example 3-1, Procedures I and VIII were performed as follows, and Procedures I to VIII were performed in the same manner except that Procedure VII was performed as in Example 5-1.
Procedure I
Prepare a glass substrate (NH35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm and dropping 2 g of the test red inkjet ink composition prepared in Production Example 4 on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.64 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 1000 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm for 2 seconds Procedure II
The coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NH 35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates (coating film) + Glass substrate + glass substrate) was placed on a hot plate at 90 ° C. and prebaked for 10 minutes to dry.

(Example 6-2)
In Example 3-2, Procedures I and VIII were performed as follows, and Procedures I to VIII were similarly performed except that Procedure VII was performed as in Example 5-2.
Procedure I
Prepare a glass substrate (NH Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm, and 2 g of the test green inkjet ink composition prepared in Production Example 4 was dropped on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.67 μm was formed by spin coating.
1. Rotate for 3 seconds at 50 rpm 2. Rotate for 2 seconds at 1050 rpm 3. Stop after decelerating to 150 rpm for 2 seconds Procedure II
The coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NH 35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates (coating film) + Glass substrate + glass substrate) was placed on a hot plate at 90 ° C. and prebaked for 10 minutes to dry.

(Example 6-3)
In Example 3-3, Procedure I and Procedure II were performed as follows, and Procedure I to VIII were performed in the same manner except that Procedure VII was performed as in Example 5-3.
Procedure I
Prepare a 100 mm × 100 mm glass substrate (NA Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm, and drop 2 g of the test blue inkjet ink composition prepared in Production Example 4 on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.89 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 800 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm in 2 seconds Procedure II
The coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NH 35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates (coating film) + Glass substrate + glass substrate) was placed on a hot plate at 90 ° C. and prebaked for 10 minutes to dry.

(Example 7-1)
In Example 1-1, Procedures I and VIII were similarly performed except that Procedure I and Procedure II were performed as follows, and Procedure VII was performed as in Example 5-1.
Procedure I
Prepare a glass substrate (NH35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm and dropping 2 g of the test red inkjet ink composition prepared in Production Example 4 on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.64 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 1000 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm for 2 seconds Procedure II
The coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NH 35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates (coating film) + Glass Substrate + Glass Substrate) was placed on a 90 ° C. hot plate and sealed with a lid, and then prebaked for 10 minutes while being reduced to a pressure of 150 torr by a pump.

(Example 7-2)
In Example 1-2, Procedures I and VIII were similarly performed except that Procedure I and Procedure II were performed as follows, and Procedure VII was performed as in Example 5-2.
Procedure I
Prepare a glass substrate (NH Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm, and 2 g of the test green inkjet ink composition prepared in Production Example 4 was dropped on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.67 μm was formed by spin coating.
1. Rotate for 3 seconds at 50 rpm 2. Rotate for 2 seconds at 1050 rpm 3. Stop after decelerating to 150 rpm for 2 seconds Procedure II
The coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NH 35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates (coating film) + Glass Substrate + Glass Substrate) was placed on a 90 ° C. hot plate and sealed with a lid, and then prebaked for 10 minutes while being reduced to a pressure of 150 torr by a pump.

(Example 7-3)
In Example 1-3, Procedures I and VIII were similarly performed except that Procedure I and Procedure II were performed as follows, and Procedure VII was performed as in Example 5-3.
Procedure I
Prepare a 100 mm × 100 mm glass substrate (NA Techno Glass Co., Ltd., NA35) having a thickness of 0.7 mm, and drop 2 g of the test blue inkjet ink composition prepared in Production Example 4 on the substrate. The following 1. ~ 3. These steps were sequentially performed, and a coating film having a thickness of 1.89 μm was formed by spin coating.
1. Rotate at 50 rpm for 3 seconds 2. Rotate at 800 rpm for 2 seconds 3. Stop after reducing the rotational speed to 150 rpm in 2 seconds Procedure II
The coating film formed as described above is placed on a 150 mm × 150 mm glass substrate (NH 35, manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm together with the glass substrate, and the coating film and two glass substrates (coating film) + Glass Substrate + Glass Substrate) was placed on a 90 ° C. hot plate and sealed with a lid, and then prebaked for 10 minutes while being reduced to a pressure of 150 torr by a pump.

(Example 8)
For Examples 1-1 to 1-3, two spectroscopic points of n = 1 and 3, which are regions facing each other across the intersection of two grooves among spectroscopic measurement points n = 1 to 4 in Procedure V, respectively. Procedures I to VIII were performed in the same manner as in Examples 1-1 to 1-3 except that the transmittance was adopted.

Example 9
For Examples 5-1 to 5-3, the two-point spectroscopy of n = 1 and 3, which are regions facing each other across the intersection of two grooves among the spectroscopic measurement points n = 1 to 4 in Procedure V, respectively. Procedures I to VIII were performed in the same manner as in Examples 5-1 to 5-3 except that the transmittance was adopted.

(Comparative Example 1-1, Comparative Example 2-1, Comparative Example 3-1)
Procedures I to VIII were performed in the same manner as in Example 1-1, Example 2-1, and Example 3-1, except that the number of spectroscopic measurement points was set to 1 in the first to third colored layers.

(Comparative Example 1-2, Comparative Example 2-2, Comparative Example 3-2)
Procedures I to VIII were performed in the same manner as in Example 1-2, Example 2-2, and Example 3-2, respectively, except that the number of spectroscopic measurement points was 1 in the first to third colored layers.

(Comparative Example 1-3, Comparative Example 2-3, Comparative Example 3-3)
Procedures I to VIII were performed in the same manner as in Example 1-3, Example 2-3, and Example 3-3, respectively, except that the number of spectroscopic measurement points was 1 in the first to third colored layers.

(Comparative Example 4-1, Comparative Example 4-2, Comparative Example 4-3)
Example 1-1 and Example 1 are the same as in Example 5 except that one substrate is used, the number of spectral measurement points is one, and the procedure VII is performed as in Example 5-1. 2. Procedures I to VIII were performed in the same manner as in Example 1-3.

(Comparative Example 5-1 and Comparative Example 6-1)
Procedures I to VIII were performed in the same manner as Example 5-1 and Example 6-1 except that the number of spectroscopic measurement points was one.

(Comparative Example 5-2, Comparative Example 6-2)
Procedures I to VIII were performed in the same manner as in Example 5-2 and Example 6-2, respectively, except that the number of spectroscopic measurement points was one.

(Comparative Example 5-3, Comparative Example 6-3)
Procedures I to VIII were performed in the same manner as Example 5-3 and Example 6-3, respectively, except that the number of spectroscopic measurement points was 1.

(Comparative Example 7-1, Comparative Example 7-2, Comparative Example 7-3)
In Comparative Example 4, procedures I to VIII were performed in the same manner except that the number of spectroscopic measurement points was changed to 4.

  Table 12 shows the results of adjusting the inkjet ink composition for a color filter based on the P / V ratio determined in Examples 2 to 7 and Comparative Examples 1 to 7, forming a colored layer, and evaluating the display performance.

  Table 12 From Examples 1 to 3 and Comparative Examples 1 to 3, the number of substrates is 3 and the drying conditions are A (drying step under reduced pressure) and B (total thickness of glass substrate in the drying step is 1.4 mm) ), Or when the number of substrates is three and only one of A and B is satisfied, display failure occurs when the number of spectroscopic measurement points is one (Comparative Examples 1 to 3). It can be seen that the display performance is excellent or good at 4 points (Examples 1 to 3).

Moreover, from Table 12 Examples 5-6 and Comparative Examples 5-6, when the number of substrates is one and only one of the drying conditions A and B is satisfied, the number of spectroscopic measurements is one (Comparative Examples 5-6). In this case, display failure occurs, but it can be seen that display performance is good at 4 points (Examples 5 to 6).
Further, it can be seen from Comparative Example 7 that when the number of substrates is one and neither of the drying conditions A and B is satisfied, a display defect occurs even when the number of spectroscopic measurement points is four.

FIG. 1 is a flowchart schematically showing an example of a partial process of the P / V ratio determination method according to the present invention. FIG. 2 is a flowchart schematically showing an example of another partial process of the P / V ratio determination method according to the present invention. FIG. 3 is a diagram schematically showing an example of a spectroscopic measurement method of the P / V ratio determination method according to the present invention. FIG. 4 is a flowchart schematically showing an example of a preferred embodiment of a partial process of the P / V ratio determination method according to the present invention. FIG. 5 is a flowchart schematically showing another example of a preferred embodiment of a partial process of the P / V ratio determination method according to the present invention. FIG. 6 is a flowchart schematically showing another example of a preferred embodiment of a partial process of the P / V ratio determination method according to the present invention. FIG. 7 is a flowchart schematically showing another example of a preferred embodiment of a partial process of the P / V ratio determination method according to the present invention. FIG. 8 is a flowchart schematically showing an example of a method for manufacturing a color filter according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Substrate 11 Substrate 12 Substrate 20 Inkjet ink composition 30 Film formed 40 Dried film 50 Heating device 60 Cured film 71 Groove 72 Groove 80 Area 90 Spectroscopic measurement point 100 Line 110 Glass plate or metal plate 120 Transparent substrate 130 Black matrix layer 140 Head 150 Pixel formation region 160 Ink layer 170 Pixel 180 Protective film 190 Color filter

Claims (9)

Applying each of the test ink compositions to two or more substrates, and forming each test ink composition using a spin coater to obtain films having different thicknesses;
Drying each of the films formed,
Curing each dried film,
Drawing two lines intersecting each of the cured films;
A step of performing spectroscopic measurement on each film at two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of each cured film,
From each of the spectroscopic measurement results and the film thickness measurement results, the relationship between the chromaticity coordinates and the film thickness in the P / V ratio of the test ink composition is derived, and from the relationship between the derived chromaticity coordinates and the film thickness, the test is performed. Calculating a film thickness at which a desired chromaticity coordinate is obtained in the P / V ratio of the ink composition for use;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. A method for determining a P / V ratio of an ink-jet ink composition for a color filter.   The method for determining a P / V ratio of an ink-jet ink composition for a color filter according to claim 1, wherein in the step of drying each film formed, each film formed is dried under reduced pressure. .   The substrate is a substrate having a thickness of 1 to 10 mm, or is a substrate in which the total thickness of the glass plate or the metal plate and the substrate is 1 to 10 mm in the drying step, and heating in the drying step. The substrate having the thickness of 1 to 10 mm having the film formed thereon is directly placed on the heating surface of the apparatus, or the substrate having the film formed on the substrate and the substrate and the glass plate or The board | substrate whose total thickness with a metal plate is 1-10 mm is mounted through the said glass plate or a metal plate, The said film formed is dried, The said film | membrane is characterized by the above-mentioned. Of determining the P / V ratio of the inkjet ink composition for color filters. Applying a test ink composition to a substrate and forming the test ink composition using a spin coater;
Drying the film formed under reduced pressure,
Curing the dried film;
Drawing two lines intersecting the cured film;
Spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of the cured film;
A step of calculating a film thickness from which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition from the spectroscopic measurement result and the film thickness measurement result;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. A method for determining a P / V ratio of an ink-jet ink composition for a color filter.   The substrate is a substrate having a thickness of 1 to 10 mm, or is a substrate in which the total thickness of the glass plate or the metal plate and the substrate is 1 to 10 mm in the drying step, and heating in the drying step. The substrate having the thickness of 1 to 10 mm having the film formed thereon is directly placed on the heating surface of the apparatus, or the substrate having the film formed on the substrate and the substrate and the glass plate or The collar according to claim 4, wherein a substrate having a total thickness of 1 to 10 mm with the metal plate is placed via the glass plate or the metal plate, and the formed film is dried. A method for determining a P / V ratio of an inkjet ink composition for a filter. A test ink composition is applied to a substrate having a thickness of 1 to 10 mm in the total thickness of a glass plate or a metal plate and the substrate in a step of drying a substrate having a thickness of 1 to 10 mm, or a film formed as a subsequent step. Applying and forming the test ink composition using a spin coater,
The substrate having the thickness of 1 to 10 mm having the formed film is placed directly on the heating surface of the heating device, or the film having the film formed on the substrate is provided, and the substrate and the glass plate Alternatively, a step of placing a substrate having a total thickness of 1 to 10 mm with the metal plate via the glass plate or the metal plate, and drying the formed film,
Curing the dried film;
Drawing two lines intersecting the cured film;
Spectroscopic measurement of two or more points belonging to different regions selected from the four regions divided by the two lines,
Measuring the film thickness at the intersection of the lines of the cured film;
A step of calculating a film thickness from which a desired chromaticity coordinate is obtained in the P / V ratio of the test ink composition from the spectroscopic measurement result and the film thickness measurement result;
From the relationship between the P / V ratio of the test ink composition, the desired chromaticity coordinates, and the calculated film thickness, the P / V ratio obtained with the desired chromaticity coordinates at the desired film thickness is calculated. A method for determining a P / V ratio of an ink-jet ink composition for a color filter.   The color according to claim 1, wherein at least one of the lines is a groove reaching the substrate surface, and the film thickness at the intersection is measured by a stylus type. A method for determining a P / V ratio of an inkjet ink composition for a filter.   An ink-jet ink composition for a color filter produced using the method for determining a P / V ratio according to any one of claims 1 to 7 is dropped on a transparent substrate by an ink-jet method to form a predetermined pattern. The manufacturing method of a color filter including the process to perform and the process of hardening the said inkjet ink composition for color filters.   A liquid crystal display device comprising a color filter manufactured by the method for manufacturing a color filter according to claim 8.

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