JP2012068557A - Ink for color filter, color filter, image display device, and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink-jet ink for a color filter which is excellent in durability, brightness, and a contrast ratio, and suppresses generation of color and density unevenness.SOLUTION: An ink applied on a coloring film including a pigment comprises a polymer X including a monomeric component expressed by a formula (11) and other two kinds of monomeric components, a polymer Y including a monomeric component expressed by a formula (15), and a chemical compound S expressed by a formula (10).

Description

  The present invention relates to a color filter ink, a color filter, an image display device, and an electronic apparatus.

A color filter is generally used for a liquid crystal display (LCD) or the like that performs color display.
A color filter has conventionally formed a coating film composed of a material (colored portion forming composition) containing a colorant, a photosensitive resin, a functional monomer, a polymerization initiator, etc. on a substrate, and then a photomask. It has been manufactured by using a so-called photolithography method in which a photosensitive process, a developing process, and the like are performed. In such a method, the colors are usually overlapped by repeating the operation of forming a coating film corresponding to each color on almost the entire surface of the substrate, curing only a part thereof, and removing most of the other part. Manufacture color filters so that they do not match. For this reason, the coating film formed in the production of the color filter has only a part remaining as a colored part in the finally obtained color filter, and most of it is removed in the production process. Become. For this reason, not only the manufacturing cost of a color filter rises but it is not preferable also from a viewpoint of resource saving.

On the other hand, in recent years, a method for forming a colored portion of a color filter using an inkjet head (droplet discharge head) has been proposed (see, for example, Patent Document 1). Such a method can reduce the waste of the colored portion forming composition, thereby reducing the burden on the environment and reducing the manufacturing cost.
However, with a color filter manufactured using an inkjet head, it is difficult to display an image with higher contrast and higher brightness, and streaky irregularities (color irregularities and density irregularities) are likely to occur in the displayed image. There was a problem.
In addition, the colored portion of the color filter is required to have durability (solvent resistance) with respect to the solvent used in the cleaning process in the manufacturing process, and durability against temperature changes during use of the color filter. It was difficult to form a colored portion having excellent durability, and it was difficult to make the durability of the color filter sufficiently excellent.

JP 2004-2815 A

  An object of the present invention is to provide a color filter that is manufactured using an ink jet method and has excellent durability, brightness and contrast ratio, and color unevenness and density unevenness are suppressed, the color filter It is another object of the present invention to provide an ink for a color filter that can be suitably used for the manufacture of an image display device, and to provide an image display device and an electronic apparatus including the color filter.

Such an object is achieved by the present invention described below.
The color filter ink of the present invention is a color filter ink used for producing a color filter by an inkjet method,
It is applied on a colored film formed using a colored ink containing a pigment,
Polymer containing monomer component x1 represented by the following formula (11), monomer component x3 represented by the following formula (13), and monomer component x4 represented by the following formula (14) X, the polymer Y containing the monomer component y1 represented by the following formula (15), and the compound S represented by the following formula (10).

As a result, the ink for a color filter applied to an ink jet method that is excellent in durability, excellent in brightness and contrast ratio, and can be suitably used for the production of a color filter in which the occurrence of uneven color and density unevenness is suppressed. Can be provided.
In addition, the voltage holding ratio of the liquid crystal layer of the liquid crystal display device including the manufactured color filter can be made excellent.
In addition, by containing the constituent material of the colored portion to be formed separately into two types of ink, it is possible to improve the ejection stability of the ink and to enable high-speed drawing by the inkjet method, The productivity of the color filter can be made particularly excellent.

In the color filter ink of the present invention, R1 and / or R2 are preferably an epoxyalkyl group.
Thereby, the colored part to be formed has excellent durability such as hardness, chemical resistance and heat resistance. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent. In addition, the occurrence of uneven color and uneven density can be more effectively prevented. In addition, the discharge stability of the color filter ink can be made particularly excellent, the productivity of the color filter can be made particularly excellent, and the reliability of the produced color filter is particularly excellent. Can be.

In the color filter ink of the present invention, R1 and / or R2 are preferably linear.
Thereby, the colored part to be formed has excellent durability such as hardness, chemical resistance and heat resistance. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent. In addition, the occurrence of uneven color and uneven density can be more effectively prevented. In addition, the discharge stability of the color filter ink can be made particularly excellent, the productivity of the color filter can be made particularly excellent, and the reliability of the produced color filter is particularly excellent. Can be.

In the color filter ink of the present invention, when the content of the compound S in the color filter ink is C _S [wt%] and the content of the polymer Y is C _Y [wt%], 0.05 It is preferable to satisfy the relationship of ≦ C _S / C _Y ≦ 0.95.
Thereby, the durability of the colored portion to be formed and the durability of the color filter can be made particularly excellent. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and furthermore, it is possible to effectively prevent bubbles from being contained in the formed colored portion. In addition, the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent, and color unevenness and density unevenness can be more effectively prevented.

In the color filter ink of the present invention, when the content rate of the polymer X in the color filter ink is C _X [wt%] and the content rate of the polymer Y is C _Y [wt%], 0. It is preferable to satisfy the relationship of 05 ≦ C _Y / C _X ≦ 20.
Thereby, the durability of the colored portion to be formed and the durability of the color filter can be made particularly excellent. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and furthermore, it is possible to effectively prevent bubbles from being contained in the formed colored portion. In addition, the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent, and color unevenness and density unevenness can be more effectively prevented.

In the color filter ink of the present invention, the colored ink may be C.I. I. Pigment red 177, C.I. I. It is preferable that the pigment red 254 and at least one of these derivatives are included.
Conventionally, when a colorant (pigment) as described above is included, problems such as a decrease in brightness and contrast ratio, color unevenness, and density unevenness have occurred more prominently. Even when a colorant (pigment) is contained, it is possible to reliably prevent the occurrence of the above problems. That is, when the above colorant (pigment) is used, the effect of the present invention is more remarkably exhibited.

In the color filter ink of the present invention, the colored ink may be C.I. I. It is preferable that the pigment green 58 is included.
Conventionally, when a colorant (pigment) as described above is included, problems such as a decrease in brightness and contrast ratio, color unevenness, and density unevenness have occurred more prominently. Even when a colorant (pigment) is contained, it is possible to reliably prevent the occurrence of the above problems. That is, when the above colorant (pigment) is used, the effect of the present invention is more remarkably exhibited.

In the color filter ink of the present invention, the colored ink may be C.I. I. Pigment Blue 15: 6 is preferably included.
Conventionally, when a colorant (pigment) as described above is included, problems such as a decrease in brightness and contrast ratio, color unevenness, and density unevenness have occurred more prominently. Even when a colorant (pigment) is contained, it is possible to reliably prevent the occurrence of the above problems. That is, when the above colorant (pigment) is used, the effect of the present invention is more remarkably exhibited.

これにより、着色膜中における顔料粒子の凝集を防止することができ、カラーフィルターを用いて表示される画像の明度およびコントラスト比等を特に優れたものとすることができる。 In the color filter ink of the present invention, the colored ink includes the monomer component m1 represented by the following formula (1), the monomer component m2 having a carboxyl group or an acid anhydride group, and the following formula (3). It is preferable that it contains the polymer M containing the monomer component m3 represented by this.

Thereby, aggregation of the pigment particles in the colored film can be prevented, and the brightness and contrast ratio of the image displayed using the color filter can be made particularly excellent.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
Accordingly, it is possible to provide a color filter that is manufactured using an ink jet method and has excellent durability, excellent brightness and contrast ratio, and generation of uneven color and uneven density.
In addition, the voltage holding ratio of the liquid crystal layer of the liquid crystal display device including the color filter can be made excellent.

An image display device according to the present invention includes the color filter according to the present invention.
Accordingly, it is possible to provide an image display device that can stably display an image that is excellent in brightness and contrast ratio, and that suppresses the occurrence of color unevenness and density unevenness.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
As a result, it is possible to provide an electronic device that can stably display an image that is excellent in brightness and contrast ratio and in which the occurrence of color unevenness and density unevenness is suppressed.

It is sectional drawing which shows suitable embodiment of the color filter of this invention. It is sectional drawing which shows suitable embodiment of the manufacturing method of the color filter of this invention. It is a perspective view which shows the droplet discharge apparatus used for manufacture of a color filter. It is sectional drawing which shows embodiment of a liquid crystal display device. 1 is a perspective view showing a configuration of a mobile (or notebook) personal computer to which an electronic apparatus of the present invention is applied. It is a perspective view which shows the structure of the mobile telephone (PHS is also included) to which the electronic device of this invention is applied. It is a perspective view which shows the structure of the digital still camera to which the electronic device of this invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail.
《Color filter ink》
The color filter ink of the present invention is used for manufacturing a color filter (forming a colored portion of a color filter), and particularly used for manufacturing a color filter by an ink jet method.

By the way, although the manufacturing method of the color filter using the inkjet method currently examined is excellent in productivity, the color filter manufactured using the inkjet head displays an image with higher contrast and higher brightness. There is a problem that streaky unevenness (color unevenness, density unevenness) is likely to occur in the display image.
In addition, the colored portion of the color filter is required to have durability (solvent resistance) with respect to the solvent used in the cleaning process in the manufacturing process, and durability against temperature changes during use of the color filter. It was difficult to form a colored portion having excellent durability, and it was difficult to make the durability of the color filter sufficiently excellent.

  Therefore, the inventor has intensively studied for the purpose of solving the above problems, and as a result, has reached the present invention. That is, the color filter ink of the present invention is applied onto a colored film formed using a colored ink containing a pigment, and a monomer represented by the following formula (11) is used as a curable resin. The component x1, the monomer component x3 represented by the following formula (13), the polymer X containing the monomer component x4 represented by the following formula (14), and the following formula (15) And a polymer S containing the monomer component y1, and a compound S represented by the following formula (10).

  As described above, the color filter ink contains the polymer X and the polymer Y and the compound S, and is applied onto the colored film formed using the colored ink containing the pigment. By this, the colored portion to be formed, the durability of the manufactured color filter is sufficiently excellent, the brightness and contrast ratio of the display image of the manufactured color filter are excellent, and the color unevenness, Generation of uneven density can be effectively prevented. This is because the surface of the colored portion (resin film) to be formed is composed of a cured product (cured product of polymer X and polymer Y) having excellent durability by adopting the configuration as described above. This is because the flatness of the surface of the colored portion to be formed can be made particularly high, and bubbles can be effectively prevented from being contained in the colored portion and the like. Conceivable. In addition, the voltage holding ratio of the liquid crystal layer of the liquid crystal display device including the manufactured color filter can be made excellent. In general, the ink used for manufacturing the color filter is completely different from that applied to a printer (for consumer use), contains a high-boiling liquid as a solvent, and contains a colorant and a resin material at a high content. However, there is a problem that the viscosity tends to be high and it is difficult to stably discharge ink droplets. Since the discharge stability can be improved and high-speed drawing by the ink jet method can be performed, the overall productivity of the color filter can be made particularly excellent. The excellent effects as described above are obtained when the color filter ink contains the polymer X, the polymer Y, and the compound S. The excellent effects as described above cannot be obtained.

In the following description, the color filter ink of the present invention (polymer X, polymer Y, and ink containing compound S) will be described as a representative case where it does not contain a colorant.
<Polymer X>
As described above, the color filter ink of the present invention includes the monomer component x1 represented by the above formula (11) as the monomer component and the single component represented by the above formula (13). The polymer X containing the monomer component x3 and the monomer component x4 represented by the above formula (14) is included as a curable resin.
By including such a polymer X together with a polymer Y (curable resin) and a compound S, which will be described in detail later, the effects described above can be obtained.
Examples of the polymer X include those represented by the following formula (17).

  In addition, the polymer X may consist essentially of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer X is a mixture of a plurality of types of compounds, each compound contains monomer components x1, x3, and x4.

(Monomer component x1)
The polymer X contains the monomer component x1 represented by the formula (11) as a monomer component.
By containing such a monomer component x1 as a monomer component, unintentional reaction (polymerization reaction) of the curable resin material during storage of color filter ink or droplet discharge can be reliably prevented. However, in the curing treatment performed in a heating environment, the curing reaction (polymerization reaction) of the curable resin material can be suitably advanced. That is, by containing the monomer component x1, the curing reaction as a whole of the curable resin material does not substantially proceed at a predetermined temperature or less, and the curing reaction can proceed efficiently at a temperature higher than that. The characteristics (hereinafter also referred to as “curing reaction switching characteristics”) can be made excellent. Further, by containing the monomer component x1 as the monomer component, for example, the long-term storage stability and ejection stability of the color filter ink can be improved. Moreover, the hardness etc. of the resin film (colored part) formed can be made excellent by containing the monomer component x1 as a monomer component.

  The content of the monomer component x1 in the polymer X (a value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 30 wt% or more and 90 wt% or less, and 40 wt% or more. More preferably, it is 80 wt% or less. When the content of the monomer component x1 in the polymer X is a value within the above range, the above-described effects can be achieved without inhibiting the functions of the monomer components x2, x3, and x4 described in detail later. It can be expressed more significantly. On the other hand, if the content of the monomer component x1 in the polymer X is less than the lower limit value, the effect of including the monomer component x1 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x1 in the polymer X exceeds the upper limit, the content of the monomer components x2, x3, and x4 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. Further, the reaction rate of the polymer X at a high temperature decreases, and it becomes difficult to produce a color filter with sufficiently excellent productivity. In addition, when the polymer X is a mixture of plural kinds of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component x1. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x1 at the content as described above.

(Monomer component x2)
The polymer X may contain the monomer component x2 represented by the following formula (12) as a monomer component.

Containing such a monomer component x2 as a monomer component (particularly, together with the monomer component x1 described above and the monomer component x3 described in detail later) can preserve the color filter ink. The curing reaction (polymerization reaction) of the curable resin material is performed in a curing process in a heated environment while reliably preventing unintentional reaction (polymerization reaction) of the curable resin material during discharge or droplet discharge. It is possible to proceed more suitably. In particular, in the curing treatment under a heating environment, the rising of the polymerization reaction of the curable resin material can be improved, and the polymerization reaction can be continuously advanced. Moreover, by including the monomer component x2 as the monomer component, the hardness of the formed resin film (colored portion) can be made particularly excellent.
Examples of the polymer X containing the monomer component x2 as a monomer component include those represented by the following formula (19).

  The content of the monomer component x2 in the polymer X (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 5 wt% or more and 60 wt% or less, preferably 10 wt% or more. More preferably, it is 50 wt% or less. When the content of the monomer component x2 in the polymer X is a value within the above range, without inhibiting the functions of the monomer component x1 and the monomer components x3 and x4 described in detail later, The effects as described above can be expressed more remarkably. On the other hand, when the content of the monomer component x2 in the polymer X is less than the lower limit, the effect of including the monomer component x2 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x2 in the polymer X exceeds the upper limit, the content of the monomer components x1, x3, and x4 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. In addition, the reactivity of the polymer X at a relatively low temperature increases, and the storage stability of the color filter ink tends to decrease. In addition, when the polymer X is a mixture of a plurality of kinds of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component x2. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x2 at the above-described content.

(Monomer component x3)
The polymer X contains the monomer component x3 represented by the above formula (13) as a monomer component.
When the polymer X contains the monomer component x3 as the monomer component, the colored portion (resin film) to be formed can have particularly excellent chemical resistance, solvent resistance, and the like. Thereby, even if it is a case where post-processing, such as chemical | medical agent application | coating and washing | cleaning, is performed after a hardening process, generation | occurrence | production of the bad influence by these can be prevented reliably.

In addition, the monomer component x3 has a sufficiently low reactivity at a relatively low temperature (for example, 100 ° C. or lower) in the polymer X, similarly to the monomer component x1 described above. In a heating environment such as the heat treatment applied in step 1, it exhibits sufficient reactivity. For this reason, in the curing process performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the curable resin material during storage of color filter ink or droplet discharge, etc., the curable resin The curing reaction (polymerization reaction) of the material can be suitably advanced.
Further, by containing the monomer component x3 as the monomer component, for example, the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent.

  The content of the monomer component x3 in the polymer X (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 2 wt% or more and 20 wt% or less, preferably 3 wt% or more. More preferably, it is 15 wt% or less. When the content of the monomer component x3 in the polymer X is a value within the above range, without inhibiting the functions of the monomer components x1 and x2 described above and the monomer component x4 described in detail later, The effects as described above can be expressed more remarkably. On the other hand, when the content of the monomer component x3 in the polymer X is less than the lower limit, the effect of including the monomer component x3 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x3 in the polymer X exceeds the upper limit, the content of the monomer components x1, x2, and x4 is relatively decreased, and these functions are not sufficiently exhibited. there is a possibility. In addition, the resin film formed using the color filter ink becomes too hard, and the tendency to follow the deformation of the substrate or the like accompanying a temperature change appears. In addition, when the polymer X is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component x3. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x3 with the content as described above.

(Monomer component x4)
The polymer X contains the monomer component x4 represented by the formula (14) as a monomer component.
When the polymer X contains such a monomer component x4 as a monomer component, the polymer X contains a polymer Y or a compound S as described later, and at the time of forming a colored portion (resin film) When removing the solvent from the color filter ink, the thixotropic property and viscosity of the color filter ink increase as the solid concentration increases, and the surface of the colored portion (resin film) formed is unintentional. Unevenness can be reliably prevented from occurring.

Moreover, the monomer component x4 has a hydroxyl group at the terminal. By having such a structure, the reactivity under a heating environment such as a curing process can be enhanced while the reactivity at a relatively low temperature (for example, 100 ° C. or less) is sufficiently low. As a result, in the curing process performed in a heating environment, the curable resin is surely prevented from unintentional reaction (polymerization reaction) of the curable resin material during storage of the color filter ink or droplet discharge. The curing reaction (polymerization reaction) of the material can proceed more suitably.
Further, by containing the monomer component x4 as the monomer component, for example, the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent.

  The content of the monomer component x4 in the polymer X (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 2 wt% or more and 20 wt% or less, preferably 3 wt% or more. More preferably, it is 15 wt% or less. When the content of the monomer component x4 in the polymer X is a value within the above range, the above-described effects are more remarkable without inhibiting the functions of the monomer components x1, x2, and x3. Can be expressed. On the other hand, when the content of the monomer component x4 in the polymer X is less than the lower limit, the effect due to the inclusion of the monomer component x4 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x4 in the polymer X exceeds the upper limit, the content of the monomer components x1, x2, and x3 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. In addition, the hardness of the resin film (colored portion) formed using the color filter ink tends to decrease. In addition, when the polymer X is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is used as the content value of the monomer component x4. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x4 with the content as described above.

The polymer X may include a monomer component (other monomer component) other than the monomer components x1, x2, x3, and x4 described above. Thereby, for example, the effects derived from the chemical structures of other monomer components can be obtained while exhibiting the above-described characteristics.
When the polymer X contains other monomer components (monomer components other than the monomer components x1, x2, x3, x4), the content of other monomer components in the polymer X ( When a plurality of other monomer components are included, the sum of these contents) is preferably 15 wt% or less, and more preferably 10 wt% or less.

The weight average molecular weight of the polymer X is preferably 1000 or more and 50000 or less, more preferably 1200 or more and 10,000 or less, and further preferably 1500 or more and 5000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion (resin film) formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be improved. It can prevent more effectively.
Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer X is preferably 1 or more and 3 or less.

  The content of the polymer X in the color filter ink is preferably 0.5 wt% or more and 10 wt% or less, and more preferably 1.0 wt% or more and 5.0 wt% or less. Thereby, the image quality of the display image of the color filter to be manufactured (color unevenness, density unevenness prevention, brightness, contrast ratio, etc.) and the durability of the color filter can be achieved at a higher level.

<Polymer Y>
As described above, the color filter ink of the present invention contains, as a curable resin, the polymer Y containing the monomer component y1 represented by the above formula (15) as the monomer component.
By including such a polymer Y together with the above-described polymer X (curable resin) and the compound S described in detail later, the above-described effects can be obtained.
Examples of the polymer Y include those represented by the following formula (18).

  The polymer Y may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer Y is a mixture of a plurality of types of compounds, each compound contains the monomer component y1.

(Monomer component y1)
The polymer Y contains the monomer component y1 represented by the formula (15) as a monomer component.
By containing such a monomer component y1 as the monomer component, the adhesion of the formed resin film to the partition walls and the like can be made particularly excellent. As a result, the durability of the color filter can be made particularly excellent.

  The content of the monomer component y1 in the polymer Y (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 30 wt% or more and 90 wt% or less, and 40 wt% or more. More preferably, it is 80 wt% or less. When the content of the monomer component y1 in the polymer Y is a value within the above range, for example, when the polymer Y includes the monomer component y2 described in detail later as the monomer component, the unit The effects as described above can be expressed more significantly without inhibiting the function of the monomer component y2. On the other hand, when the content of the monomer component y1 in the polymer Y is less than the lower limit value, the effect of including the monomer component y1 may not be sufficiently exhibited. On the other hand, when the content of the monomer component y1 in the polymer Y exceeds the upper limit, for example, when the polymer Y includes the monomer component y2 described in detail later as the monomer component, Accordingly, the content of the monomer component y2 may be reduced, and the function of the monomer component y2 may not be sufficiently exhibited. In addition, when the colored portion (resin film) is formed, when the solvent is removed from the color filter ink, the viscosity of the color filter ink tends to increase with an increase in the solid content concentration. Involuntary irregularities are likely to occur on the surface of the (resin film). In addition, when the polymer Y is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component y1. can do. Moreover, when the polymer Y is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component y1 at the content as described above.

(Monomer component y2)
The polymer Y may contain the monomer component y2 represented by the following formula (16) as a monomer component.

  By containing such a monomer component y2 as a monomer component (particularly, together with the above-described monomer component y1), curability at the time of storage of color filter ink, droplet discharge, etc. In the curing treatment performed in a heated environment, the curing reaction (polymerization reaction) of the curable resin material can be suitably advanced while preventing the unintentional reaction (polymerization reaction) of the resin material more reliably. In particular, in the curing treatment under a heating environment, the rising of the polymerization reaction of the curable resin material can be improved, and the polymerization reaction can be continuously advanced. Moreover, the hardness etc. of the resin film (colored part) formed can be made excellent by containing the monomer component y2 as a monomer component.

Further, when the polymer Y contains the monomer component y2, the affinity and compatibility with the polymer X described above can be sufficiently improved. As a result, the discharge stability of the color filter ink can be made excellent, and the resin film formed using the color filter ink has excellent transparency (due to the opacity of the curable resin material). The decrease in light transmittance is prevented), and the adhesion to the partition walls is particularly excellent, and problems such as cracks are less likely to occur. On the other hand, if the monomer component y2 is not contained as the monomer component, it will be difficult to sufficiently improve the affinity and compatibility with the polymer X, and the color filter ink is stable in ejection. In addition, the manufactured color filter is likely to have uneven color, and it may be difficult to sufficiently improve contrast, durability, reliability, and the like.
An example of the polymer Y containing the monomer component y2 as a monomer component is represented by the following formula (20).

  The content of the monomer component y2 in the polymer Y (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 10 wt% or more and 70 wt% or less, and more preferably 20 wt% or more. More preferably, it is 60 wt% or less. When the content of the monomer component y2 in the polymer Y is a value within the above range, the above-described effects can be expressed more significantly without inhibiting the function of the monomer component y1 described above. Can do. On the other hand, when the content of the monomer component y2 in the polymer Y is less than the lower limit value, the effect of including the monomer component y2 may not be sufficiently exhibited. On the other hand, when the content of the monomer component y2 in the polymer Y exceeds the upper limit, the content of the monomer component y1 is relatively lowered, and the function of the monomer component y1 is not sufficiently exhibited. there is a possibility. In addition, the reactivity of the polymer Y at a relatively low temperature increases, and the storage stability of the color filter ink tends to decrease. In addition, when the polymer Y is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component y2. can do. Moreover, when the polymer Y is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component y2 with the content as described above.

In addition, the polymer Y may contain monomer components (other monomer components) other than the monomer components y1 and y2 described above. Thereby, for example, the effects derived from the chemical structures of other monomer components can be obtained while exhibiting the above-described characteristics.
When the polymer Y contains other monomer components (monomer components other than the monomer components y1 and y2), the content of other monomer components in the polymer Y (multiple types of other components) In the case where the monomer component is included, the sum of these contents) is preferably 15 wt% or less, and more preferably 10 wt% or less.

The weight average molecular weight of the polymer Y is preferably 1000 or more and 50000 or less, more preferably 1200 or more and 10,000 or less, and further preferably 1500 or more and 5000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the resin film formed using the color filter ink can be made more reliable, and the occurrence of color unevenness and the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer Y is 1 or more and 3 or less.

  The content of the polymer Y in the color filter ink is preferably 1.0 wt% or more and 17 wt% or less, and more preferably 4.0 wt% or more and 13 wt% or less. Thereby, the image quality of the display image of the color filter to be manufactured (color unevenness, density unevenness prevention, brightness, contrast ratio, etc.) and the durability of the color filter can be achieved at a higher level.

When the content of the polymer X in the color filter ink is C _X [wt%] and the content of the polymer Y in the color filter ink is C _Y [wt%], 0.05 ≦ C _Y / C _X ≦ 20 is preferably satisfied, 1.5 ≦ C _Y / C _X ≦ 15 is more preferable, and 5 ≦ C _Y / C _X ≦ 10 is satisfied. Is more preferable. Thereby, the durability of the colored portion to be formed and the durability of the color filter can be made particularly excellent. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and furthermore, it is possible to effectively prevent bubbles from being contained in the formed colored portion. In addition, the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent, and color unevenness and density unevenness can be more effectively prevented.

<Compound S>
As described above, the color filter ink of the present invention contains the polymer X and the polymer Y.
By the way, the inventor of the present invention is that the cured product of the composition containing the polymer X and the polymer Y as described above is excellent in solvent resistance, heat resistance, etc. Has been found to be excellent in adhesion.

  However, when a composition containing the polymer X and the polymer Y is simply applied onto a colored film formed using a colored ink containing a pigment, the surface of the film formed using the composition is flat. The color brightness and the contrast ratio of the image displayed using the manufactured color filter cannot be sufficiently improved, the color unevenness and the density in the display image. This causes problems such as the occurrence of unevenness. Such a problem is that the colored film containing the pigment particles is porous and easily absorbs moisture, and the polymer Y contained in the color filter ink applied on the colored film reacts with water in the colored film, This is considered to be because the product has low compatibility with the polymer X and causes phase separation in the formed film.

  Therefore, as a result of further earnest studies, the present inventors have found that the durability of the color filter produced by including the compound S represented by the above formula (10) together with the polymer X and the polymer Y described above. It has been found that the brightness and contrast ratio of an image displayed using a color filter can be made excellent, and the occurrence of uneven color and uneven density can be effectively prevented. . In particular, even when a substrate on which a colored film containing a pigment is formed is left for a long period of time in an environment that easily absorbs moisture, it is possible to effectively prevent the above-described problem from occurring. The degree of freedom in designing the manufacturing process increases. In addition, since the compound S has a relatively low viscosity and can function as a solvent for dissolving the polymer X and the polymer Y in the color filter ink, the discharge stability of the color filter ink is improved. The property can be made particularly excellent. Moreover, since the content rate of the other solvent component in the color filter ink can be reduced, the solvent component can be reliably removed in a short time in the color filter manufacturing process.

  In the above formula (10), the substituents R1 and R2 are alkyl groups or epoxyalkyl groups, but at least one of R1 and R2 is preferably an epoxyalkyl group. Thereby, the said epoxy alkyl group can contribute to hardening at the time of colored part formation, and the formed colored part becomes excellent in durability, such as hardness, chemical resistance, and heat resistance. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent. In addition, the occurrence of uneven color and uneven density can be more effectively prevented. In addition, the discharge stability of the color filter ink can be made particularly excellent, the productivity of the color filter can be made particularly excellent, and the reliability of the produced color filter is particularly excellent. Can be.

In the above formula (10), the carbon numbers of the substituents R1 and R2 may be 4 or more and 30 or less, respectively, but are preferably 6 or more and 20 or less. Thereby, the viscosity of the color filter ink can be made sufficiently low, and the fluidity of the color filter ink when forming the colored portion can be made particularly excellent.
In the above formula (10), each of the substituents R1 and R2 may have a branched chain or a straight chain, but is preferably a straight chain. Thereby, the colored part to be formed has excellent durability such as hardness, chemical resistance and heat resistance. Further, the flatness of the surface of the film formed using the color filter ink can be made particularly high, and the brightness and contrast ratio of the display image of the produced color filter can be made particularly excellent. In addition, the occurrence of uneven color and uneven density can be more effectively prevented. In addition, the discharge stability of the color filter ink can be made particularly excellent, the productivity of the color filter can be made particularly excellent, and the reliability of the produced color filter is particularly excellent. Can be.
In the above formula (10), the substituents R1 and R2 may be the same substituent or different substituents, but are preferably the same substituent.

  In the above formula (10), when at least one of R1 and R2 is an epoxyalkyl group, the epoxyalkyl group is preferably provided with an epoxy group near the center of the main chain portion. More specifically, when the number of carbon atoms in the main chain of the epoxy alkyl group is n, the number of epoxy groups is (n / 2) -1 to (n / 2) +1 from one end of the main chain. The eye carbon preferably forms part of an epoxy group. Alternatively, when the number of carbons in the main chain of the epoxy alkyl group is 8 or more, it is preferable that three or more carbons apart from the carbons at both ends of the main chain constitute an epoxy group. Thus, by providing the epoxy group near the center of the main chain of the epoxy alkyl group, the reactivity of the epoxy group is suppressed and the unintentional reaction of the epoxy group is prevented. In particular, such a tendency becomes more prominent as the number of carbon atoms in the main chain of the epoxy alkyl group increases.

In the above formula (10), examples of the substituents R1 and R2 include butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, dodecyl, tetradecyl, pentadecyl, hexadecyl, Examples include various linear alkyl groups such as heptadecyl group, octadecyl group, and eicosyl group, branched alkyl groups, and epoxidized substituents thereof.
Among the compounds described above, the compound S is preferably a compound represented by the following formulas (21) to (26).

When the content of the compound S in the color filter ink is C _S [wt%] and the content of the polymer Y is C _Y [wt%], 0.05 ≦ C _S / C _Y ≦ 0.95 The relationship is preferably satisfied, and more preferably 0.07 ≦ C _S / C _Y ≦ 0.70. Thereby, the effect (the effect by including the compound S with the polymer X and the polymer Y) by including the compound S as described above can be exhibited more remarkably.

  The content of the compound S in the color filter ink is preferably 0.01 wt% or more and 10.0 wt% or less, and more preferably 0.08 wt% or more and 6.1 wt% or less. Thereby, the effect (the effect by including the compound S with the polymer X and the polymer Y) by including the compound S as described above can be exhibited more remarkably.

<Solvent>
As described above, the compound S also has a function as a solvent for dissolving the polymer X and the polymer Y. However, the color filter ink of the present invention may contain other solvent components. Good.
As such a solvent component, for example, an ester compound, an ether compound, a hydroxyketone, a carbonic acid diester, a cyclic amide compound and the like can be used. Among them, [1] a polyhydric alcohol (for example, ethylene glycol, propylene glycol, butylene) Glycol (glycerin, etc.) as a condensate (polyhydric alcohol ether), polyhydric alcohol or alkyl ether of polyhydric alcohol ether (for example, methyl ether, ethyl ether, butyl ether, hexyl ether, etc.), ester (for example, Formates, acetates, propionates, etc.), acetates, [2] esters of polyvalent carboxylic acids (eg, succinic acid, glutaric acid, etc.) (eg, methyl esters), [3] at least one hydroxyl group in the molecule and at least One ether of a compound having a carboxyl group (hydroxy acid), esters and the like, (4) polyhydric alcohol and carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred.

  Among the color filter inks described above, the solvent preferably contains methoxybutyl acetate and / or dipropylene glycol dimethyl ether together with diethylene glycol monobutyl ether acetate as a solvent. Thereby, the droplet discharge property of the color filter ink can be made particularly excellent, and the productivity of the color filter can be made particularly excellent. Further, it is possible to more reliably prevent the pigment from diffusing into the color filter ink (resin film) from the colored film formed with the colored ink described in detail later. Further, the polymer (polymer X, polymer Y) contained in the color filter ink can be suitably permeated into the colored film, and the generation of bubbles in the formed colored portion can be more reliably prevented. it can. For this reason, it is possible to more effectively prevent a decrease in brightness and contrast ratio, color unevenness and density unevenness, and a voltage holding ratio (VHR) of a liquid crystal layer of a liquid crystal display device provided with a color filter. ) Can also be good.

When the color filter ink contains methoxybutyl acetate and / or dipropylene glycol dimethyl ether together with diethylene glycol monobutyl ether acetate, the content of diethylene glycol monobutyl ether acetate in the color filter ink is C _A [wt%], for color filters When the sum of the content of methoxybutyl acetate and the content of dipropylene glycol dimethyl ether in the ink is C _B [wt%], the relationship 0.15 ≦ C _B / C _A ≦ 0.43 is satisfied. It is more preferable that the relationship 0.16 ≦ C _B / C _A ≦ 0.40 is satisfied, and it is more preferable that the relationship 0.17 ≦ C _B / C _A ≦ 0.35 is satisfied. Thereby, the droplet discharge property of the color filter ink can be made particularly excellent, and the productivity of the color filter can be made particularly excellent. Further, it is possible to more reliably prevent the pigment from diffusing into the color filter ink (resin film) from the colored film formed of the colored ink. Further, the polymer (polymer X, polymer Y) contained in the color filter ink can be suitably permeated into the colored film, and the generation of bubbles in the formed colored portion can be more reliably prevented. it can. For this reason, it is possible to more effectively prevent a decrease in brightness and contrast ratio, color unevenness and density unevenness, and a voltage holding ratio (VHR) of a liquid crystal layer of a liquid crystal display device provided with a color filter. ) Can also be good.
The color filter ink may contain diethylene glycol phenyl ether and / or ethylene glycol phenyl ether as a solvent.

  The content of the solvent (excluding Compound S) in the color filter ink is preferably 40 wt% or more and 95 wt% or less, and more preferably 60 wt% or more and 88 wt% or less. When the content of the solvent (excluding Compound S) is a value within the above range, the discharge property of the color filter ink from the droplet discharge head is particularly excellent, and the thickness of the colored portion of the produced color filter The uniformity of the thickness can be made higher. For this reason, the obtained color filter is one in which density unevenness and color unevenness in each part are particularly effectively suppressed, and when used in an image display device, a particularly clear image can be displayed. .

<Other ingredients>
The color filter ink only needs to contain the polymer X, the polymer Y, and the compound S as described above, but may further contain components other than the above (other components). Good.
Examples of such components include various crosslinking agents, thermal acid generators, photoacid generators, various polymerization initiators, acid crosslinking agents, surfactants, sensitizers, light stabilizers, various dispersants, and light emitting materials. , Leveling agents, antioxidants, ultraviolet absorbers, adhesion improvers, various polymerization accelerators, various light stabilizers, ceramics such as glass, zirconia, alumina, titanium oxide, adhesion promoters, ultraviolet absorbers, aggregation prevention An agent, a plasticizer, etc. can be used.

  The leveling agent smoothes the surface of the color filter ink applied in the cell and reduces the surface tension of the color filter ink, thereby flattening the resin film. For this reason, since the color filter ink has a leveling agent, it acts synergistically with the effects of including the polymer X, the polymer Y, and the compound S as described above, and the color filter ink in the cell. The surface of can be made flatter. For this reason, the formed film becomes flatter.

  Examples of the leveling agent include acrylic leveling agents, vinyl ether leveling agents, silicone leveling agents, fluorine-silicon leveling agents, and acetylene glycol leveling agents. Among such leveling agents, acrylic leveling agents, vinyl ether leveling agents, and acetylene glycol leveling agents are preferably used. In particular, it is preferable to use one or more selected from LHP-95, LHP-90, LF1970, and Surfynol DF-58. As a result, the surface of the film to be formed is further flattened, and the obtained color filter has particularly small color unevenness and density unevenness at each part.

The color filter ink may contain a polymer component other than the polymer X and the polymer Y (hereinafter referred to as “other polymer component”), but other polymer components (for example, When the polymer M or the like described later is included, the other polymer component contained in the color filter ink is preferably 10 wt% or less, and more preferably 5 wt% or less. Thereby, the effect of this invention can be exhibited reliably.
For example, the color filter ink may contain a colorant, but preferably does not contain a colorant. When the color filter ink contains a colorant, the content of the colorant contained in the color filter ink is preferably 0.5 wt% or less, and more preferably 0.2 wt% or less. .

  The viscosity at 25 ° C. of the color filter ink is preferably 2.0 mPa · s to 9.0 mPa · s, and more preferably 3.0 mPa · s to 7.0 mPa · s. This makes it possible to more reliably prevent clogging from occurring in the droplet ejection head while making the variation in the droplet volume of the color filter ink to be ejected particularly small in droplet ejection by the inkjet method as described later. can do. As a result, the obtained color filter can further improve the uniformity of each colored portion, and can display a particularly clear image when used in an image display device.

《Colored ink》
Next, the color ink (colored film forming ink) used for forming the colored film will be described.
The colored ink (colored film forming ink) is used for forming a colored film covered with the resin film by the color filter ink described above, and contains a pigment.
Thus, by including a pigment in a color ink different from the color filter ink (resin film forming ink), it is not necessary to include the pigment in the color filter ink, or in the color filter ink. It is possible to reduce the content of the pigment in the ink, and the discharge stability of the color filter ink can be made particularly excellent. Moreover, the colored part to be formed can be a laminated structure of a colored film and a resin film covering the surface, preventing the pigment from being exposed near the surface, and improving the durability of the colored part and the color filter. It can be excellent.

  The colored ink may be applied to the substrate by any method, but is applied to the ink jet method in the same manner as the color filter ink (resin film forming ink) of the present invention described above. Is preferred. As a result, waste of materials in the entire manufacturing process of the color filter can be reduced, so that the burden on the environment can be reduced and the manufacturing cost can be suppressed. Further, by applying the same ink jet method as the color filter ink (resin film forming ink), it is possible to improve the efficiency of color filter production facilities.

  The color filter usually includes a plurality of colored portions (colored films). For this reason, it is preferable to use a plurality of colored inks (colored film forming inks) corresponding to the formation of the colored film, and in particular, the three colors constituting the three primary colors of light, red It is preferable to use a colored ink (red ink), a green colored ink (green ink), and a blue colored ink (blue ink). Thereby, a color filter with a wide color reproduction range can be manufactured easily and efficiently. In the following description, a case where three types of inks “red ink (R ink)”, “green ink (G ink)”, and “blue ink (B ink)” are used as colored inks in the manufacture of the color filter. A representative explanation will be given.

<Pigment>
The colored ink usually contains a pigment corresponding to the color tone of the colored film to be formed. The colored ink used for forming the colored film contains a pigment as a colorant. Thereby, the light resistance, heat resistance, etc. of the manufactured color filter can be made particularly excellent. In addition, in a color filter manufactured using a conventional ink jet method, when a pigment is included as a colorant, problems such as a decrease in brightness, contrast ratio, color unevenness, and density unevenness occurred more remarkably. However, in the present invention, even when a pigment is included as a colorant, the occurrence of the above problems can be reliably prevented.

(Red ink)
The red ink usually contains a red pigment.
Examples of the pigment contained in the red ink include C.I. I. Pigment Red 2,3,5,17,22,23,38,81, 48: 1, 48: 2, 48: 3, 48: 4, 49: 1, 52: 1, 53: 1, 57: 1. 63: 1,112,122,144,146,149,166,170,176,177,178,179,185,202,207,209,254,101,102,105,106,108,108: 1 etc. 1 type or 2 types or more selected from these can be used in combination.

Examples of the pigment constituting the red ink include those described above. I. Pigment red 177, C.I. I. It is preferable to include pigment red 254 and red ink containing at least one of these derivatives. Conventionally, when the above pigments are included, problems such as a decrease in brightness and contrast ratio, color unevenness, and density unevenness have occurred more remarkably. However, in the present invention, the above pigments are included. Even if it is a case, generation | occurrence | production of the above problems can be prevented reliably. That is, when the above pigment is used, the effect of the present invention is more remarkably exhibited.
C. I. Pigment Red 177 derivatives, C.I. I. In the case of containing a compound (derivative) represented by the following formula (30) or the following formula (31) as a pigment red 254 derivative, the effects as described above are more remarkably exhibited.

In addition to the pigments described above, red ink includes, for example, Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 34, 35, 35: 1, 37, 37: 1, 42, 43, 53, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138, 139, 150, 151, 152, 153, 154, 155, 156, 157, 166, 168, 175, 180, It may contain pigments such as 184 and 185. Thereby, the color tone of the colored part formed can be adjusted more suitably. Among these, pigment yellow 138, 139, 150, 184, and 185 are preferable, and pigment yellow 150 is more preferable. Thereby, the effect mentioned above is exhibited more notably.
The pigment content in the red ink is preferably 7.0 wt% or more and 30.0 wt% or less, and more preferably 7.5 wt% or more and 25.0 wt% or more. Thereby, in the manufactured color filter, a higher color density can be ensured and can be used for clearer image display.

(Green ink)
Green ink usually contains a green pigment.
The pigment contained in the green ink is not particularly limited. I. Pigment green 7,36,15,17,18,19,26,50,58 etc. are mentioned.
Examples of the pigment constituting the green ink include those described above. I. It is preferable to include green ink including pigment green 58. Conventionally, when the above pigments are included, problems such as a decrease in brightness and contrast ratio, color unevenness, and density unevenness have occurred more remarkably. However, in the present invention, the above pigments are included. Even if it is a case, generation | occurrence | production of the above problems can be prevented reliably. That is, when the above pigment is used, the effect of the present invention is more remarkably exhibited.

Further, the green ink is C.I. I. When the pigment green 58 is included, it is preferable to further include a sulfonated pigment derivative as a sub-pigment. Thereby, the coloring property of the colored part formed using the green ink can be further improved.
Green ink is C.I. I. When the pigment green 58 and the sulfonated pigment derivative are included, the sulfonated pigment derivative preferably contains a compound (derivative) represented by the following formula (32). Thereby, the effects as described above are more remarkably exhibited.

  Green ink is C.I. I. When the pigment green 58 and the pigment derivative (sulfonated pigment derivative) as described above are included, the content of the pigment derivative (sulfonated pigment derivative) is not particularly limited. I. Pigment Green 58 (main pigment): 10 parts by weight or more and 80 parts by weight or less is preferable with respect to 100 parts by weight, and more preferably 30 parts by weight or more and 70 parts by weight or less. Thereby, the contrast and brightness of the display image of the produced color filter 1 can be made particularly excellent.

In addition to the pigments described above, the green ink is, for example, pigment yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 34, 35, 35: 1, 37, 37: 1, 42, 43, 53, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138, 139, 150, 151, 152, 153, 154, 155, 156, 157, 166, 168, 175, 180, It may contain pigments such as 184 and 185. Thereby, the color tone of the colored part formed can be adjusted more suitably. Among these, pigment yellow 138, 139, 150, 184, and 185 are preferable, and pigment yellow 150 is more preferable. Thereby, the effect mentioned above is exhibited more notably.
The content of the pigment in the green ink is preferably 8.0 wt% or more and 25.0 wt% or less, and more preferably 8.5 wt% or more and 18.0 wt% or less. Thereby, in the manufactured color filter, a higher color density can be ensured and can be used for clearer image display.

(Blue ink)
The blue ink usually contains a blue pigment.
Examples of the pigment contained in the blue ink include C.I. I. Pigment blue 1,15,15: 1,15: 2,15: 3, 15: 4, 15: 6, 17: 1, 18, 27, 28, 29, 35, 36, 60, 80, etc. One or more selected from these can be used in combination.

Examples of the pigment constituting the blue ink include those described above. I. It is preferable to have a blue ink containing Pigment Blue 15: 6. Conventionally, when the above pigments are included, problems such as a decrease in brightness and contrast ratio, color unevenness, and density unevenness have occurred more remarkably. However, in the present invention, the above pigments are included. Even if it is a case, generation | occurrence | production of the above problems can be prevented reliably. That is, when the above pigment is used, the effect of the present invention is more remarkably exhibited.
Also, the blue ink is C.I. I. In the case of including Pigment Blue 15: 6, C.I. I. Pigment Violet 23 is preferably included. Thereby, the coloring property of the colored part formed using the blue ink can be further improved.

  The pigment content in the blue ink is preferably 6.0 wt% or more and 20.0 wt% or less, and more preferably 6.5 wt% or more and 15.0 wt% or less. As a result, it is possible to ensure a sufficient color density in the manufactured color filter while improving the blue ink discharge performance from the droplet discharge head (inkjet head) for manufacturing the color filter. The reproduction range can be widened. Moreover, in the manufactured color filter, the uniformity of color density between colored portions of different colors can be made particularly excellent. Moreover, the durability of the manufactured color filter can be made excellent.

<Dispersion medium>
The colored ink contains a dispersion medium having a function of dispersing the pigment as described above. In general, most of the dispersion medium is removed in the process of manufacturing the color filter.
As the dispersion medium, for example, ester compounds, ether compounds, hydroxy ketones, carbonic acid diesters, cyclic amide compounds and the like can be used. Among them, [1] polyhydric alcohols (for example, ethylene glycol, propylene glycol, butylene glycol, glycerin). Ethers (polyhydric alcohol ethers) as condensates of polyhydric alcohols or alkyl ethers of polyhydric alcohol ethers (eg methyl ether, ethyl ether, butyl ether, hexyl ether), esters (eg, formate, acetate) , Propionate, etc.), acetates, [2] esters of polyvalent carboxylic acids (eg, succinic acid, glutaric acid, etc.) (eg, methyl esters), [3] at least one hydroxyl group and at least one carbohydrate in the molecule Ether of a compound having a sill group (hydroxy acid), esters and the like, (4) polyhydric alcohol and carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred.

  Among them, the dispersion medium is diethylene glycol dimethyl ether, 1,3-butylene glycol diacetate, triethylene glycol diethyl ether, bis (2-butoxyethyl) ether, diethylene glycol monobutyl ether acetate, diethylene glycol phenyl ether, ethylene glycol phenyl ether, and 2 It is preferable that it includes one or more selected from the group consisting of-(2-methoxy-1-methylethoxy) -1-methylethyl acetate. Thereby, the discharge stability of the colored ink can be made particularly excellent, and the productivity of the color filter can be made particularly excellent. In addition, the dispersion medium constituting the colored ink can be suitably removed before applying the color filter ink (resin film forming ink), and the formed colored film should have excellent solvent resistance. Therefore, the pigment contained in the colored ink can be more reliably prevented from diffusing into the resin film formed by the color filter ink. As a result, it is possible to more effectively prevent a decrease in brightness and contrast ratio, color unevenness and density unevenness, and a good voltage holding ratio (VHR) of a liquid crystal layer of a liquid crystal display device provided with a color filter. Can be.

Moreover, it is preferable that the colored ink does not contain a high-boiling component having a boiling point of 250 ° C. or higher as a dispersion medium. Thereby, it can prevent more reliably that a bubble is contained in the colored part formed, and as a result, the contrast of the display image using a color filter, etc. can be made more excellent reliably.
Further, the content of the dispersion medium in the colored ink (the sum of these contents when plural kinds of components are included) is preferably 50 wt% or more and 95 wt% or less, and is 60 wt% or more and 90 wt% or less. Is more preferable. When the content of the dispersion medium is a value within the above range, the discharge property of the colored ink from the droplet discharge head can be made particularly excellent. In addition, the thickness of the colored film of the color filter to be manufactured can be made uniform and the flatness of the formed colored film can be made higher. In addition to being able to suppress more effectively, the uniformity of characteristics among individuals can be made particularly excellent. Moreover, in the manufactured color filter, a sufficient color density can be ensured and the color reproduction range can be widened.

<Polymer M>
The colored ink is represented by a monomer component m1 represented by the following formula (1), a monomer component m2 having a carboxyl group or an acid anhydride group, and the following formula (3). It is preferable that the polymer M containing the monomer component m3 is included.

Thereby, aggregation of the pigment particles in the colored film can be prevented, and the brightness and contrast ratio of the image displayed using the color filter can be made particularly excellent.
In addition, the polymer M may consist essentially of a single compound, or may be a mixture of a plurality of types of compounds.

(Monomer component m1)
The polymer M contains a monomer component m1 represented by the above formula (1), that is, a compound having a blocked isocyanate group (hereinafter also referred to as “block isocyanate group”) as a monomer component. It will be. The polymer M constituting the colored ink may include a plurality of monomer components m1 represented by the general formula (1) in the molecule.

In the monomer component m1 represented by the formula (1), R ¹ represents a hydrogen atom or a methyl group, and R ² represents a divalent aliphatic saturated hydrocarbon group having 1 to 8 carbon atoms. R ³ represents a residue of an isocyanate group blocking agent R ³ H.
Examples of the divalent saturated aliphatic hydrocarbon group having 1 to 8 carbon atoms in R ² include a linear or branched divalent saturated aliphatic hydrocarbon group (alkylene group). A divalent saturated aliphatic hydrocarbon group having 2 to 4 carbon atoms such as ethylene, trimethylene and propylene groups is preferred.

Examples of the isocyanate group blocking agent R ³ H include oxime blocking agents such as formaldoxime, acetoaldoxime, acetoxime, methyl ethyl ketoxime, methyl isobutyl ketoxime, diethyl ketoxime, cyclohexanone oxime, diacetyl monooxime, and benzophenone oxime. A pyrazole block agent such as 3,5-dimethylpyrazole; an alcohol block agent such as methanol and ethanol; a phenol block agent such as phenol and cresol; a mercaptan block agent such as butyl mercaptan; acetanilide, ε-caprolactam, γ -Acid amide blocking agents such as butyrolactam; active methylene blocking agents such as dimethyl malonate and methyl acetoacetate; imides such as succinimide and maleic imide Lock agent; urea blocking agents; N- phenylcarbamate type blocking agents of phenyl carbamate, and the like; diphenylamine, amine blocking agents such as aniline, ethylene imine, etc. imine blocking agents such as polyethyleneimine.
As an isocyanate group blocking agent, an oxime blocking agent and a pyrazole blocking agent are preferable, and those represented by the following formula (5) are more preferable.

Examples of the alkyl group having 1 to 8 carbon atoms in R ⁶ and R ⁷ in the formula (5) include linear or branched alkyl groups, and the number of carbon atoms such as methyl, ethyl, and propyl groups. 1 or more and 4 or less linear or branched alkyl group is preferable. Examples of the ring in which R ⁶ and R ⁷ are bonded to each other together with the adjacent carbon atom include a cycloalkane having about 3 to 12 members (preferably 5 or 6 members) such as a cyclobutane ring, a cyclopentane ring, and a cyclohexane ring. A ring etc. are mentioned.

  Specific examples of the monomer component m1 represented by the formula (1) include 2- [O- (1'-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneamino). (Oxycarbonylaminoethyl) methacrylate) (represented by the following formula (6)), 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate (represented by the following formula (7)) ) And the like.

  The content of the monomer component m1 in the polymer M (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is 1 wt% or more and 99 wt% or less (for example, 10 wt% or more and 95 wt% or less). It is preferably 20 wt% or more and 90 wt% or less, more preferably 25 wt% or more and 88 wt% or less. In addition, when the polymer M contains a plurality of types of monomer components m1, it is preferable that the sum of the contents of the plurality of types of monomer components m1 satisfies the above-described conditions. Further, when the polymer M is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is used as the content value of the monomer component m1. can do. Moreover, when the polymer M is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component m1 at the content described above.

(Monomer component m2)
The polymer M contains a monomer component m2 having a carboxyl group or an acid anhydride group as a monomer component. The polymer M constituting the colored ink may contain a plurality of types of monomer components m2 in the molecule.
By including such a monomer component m2 as a monomer component in the polymer M, it is possible to improve the wetting and spreading of the colored ink on the substrate, and the mixing of bubbles and the like is ensured. A colored film that is prevented and has excellent adhesion to the substrate can be suitably formed. Further, by containing the monomer component m2 as a monomer component, the long-term storage stability of the colored ink can be made particularly excellent.

  Examples of the monomer component m2 include unsaturated carboxylic acids or acid anhydrides thereof. Specific examples of the monomer component m2 include α, β-unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, and acid anhydrides thereof (maleic anhydride, itaconic anhydride). Acid) and the like, and among them, acrylic acid and methacrylic acid (represented by the following formula (2)) are particularly preferable.

  The content of the monomer component m2 in the polymer M (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 0.5 wt% or more and 98 wt% or less (for example, 2.5 wt% or more). 70 wt% or less), preferably 3 wt% or more and 50 wt% or less, more preferably 5 wt% or more and 40 wt% or less. When the content of the monomer component m2 in the polymer M is a value within the above range, the above-described monomer component m1 and the monomer component m3 described in detail later are not impaired, and the above-described functions are not impaired. The effect as described above can be expressed more remarkably. On the other hand, when the content of the monomer component m2 in the polymer M is less than the lower limit, the effect of including the monomer component m2 may not be sufficiently exhibited. On the other hand, when the content of the monomer component m2 in the polymer M exceeds the upper limit, the content of the monomer components m1, m3, etc. may be relatively decreased, and these functions may not be sufficiently exhibited. There is sex. In addition, when the polymer M contains a plurality of types of monomer components m2, it is preferable that the sum of the contents of the plurality of types of monomer components m2 satisfies the above-described conditions. Further, when the polymer M is a mixture of plural kinds of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component m2. can do. Moreover, when the polymer M is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component m2 with the content as described above.

(Monomer component m3)
The polymer M contains the monomer component m3 ((meth) acrylic acid ester) represented by the above formula (3) as a monomer component. The polymer M constituting the colored ink may include a plurality of monomer components m3 represented by the general formula (3) in the molecule.

  By containing such a monomer component m3 as a monomer component in the polymer M, the flatness of the colored film formed using the colored ink can be made high. Further, by containing the monomer component m3 as a monomer component in the polymer M, the discharge stability of the colored ink can be improved. Further, by containing the monomer component m3 as a monomer component in the polymer M, the storage stability (long-term storage stability) of the colored ink can be improved.

Examples of the hydrocarbon group having 16 to 25 carbon atoms in R ⁵ include alkyl groups such as hexadecyl (cetyl), heptadecyl, octadecyl (stearyl), nonadecyl, icosyl and docosyl (behenyl) groups; 10-cyclohexyldecyl, 12 A group in which an alicyclic hydrocarbon group such as cyclohexyldodecyl, 14-cyclohexyltetradecyl, 16-cyclohexylhexadecyl and the like are bonded to an alkyl group; 10-phenyldecyl, 12-phenyldodecyl, 14-phenyltetradecyl, 16 -Aralkyl groups, such as a phenyl hexadecyl group, etc. are mentioned.

Examples of the hydrocarbon group-substituted oxy group that the hydrocarbon group having 16 to 25 carbon atoms may have include, for example, alkoxy groups such as methoxy and ethoxy groups (for example, alkoxy groups having 1 to 10 carbon atoms); Aryloxy group such as phenoxy group; alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group and dicyclopentanyloxy group; and 1 to 15 carbon atoms such as aralkyloxy group such as benzyloxy group (preferably, And a hydrocarbon group-substituted oxy group having 1 to 12 carbon atoms.
Specific examples of the monomer component m3 include cetyl (meth) acrylate, stearyl (meth) acrylate, and behenyl (meth) acrylate.

As described above, the number of carbon atoms of the hydrocarbon group (which may have a hydrocarbon group-substituted oxy group) contained in the monomer component m3 constituting the polymer M (hereinafter also referred to as the carbon number of R ⁵ ). Is 16 or more and 25 or less, particularly preferably 16 or more and 22 or less, and more preferably 16 or more and 20 or less. Thereby, the effect mentioned above is exhibited more notably. On the other hand, when the carbon number of R ⁵ is less than the lower limit value or exceeds the upper limit value, the excellent effects as described above cannot be obtained. Thus, the polymer M has one big feature in that it includes a monomer component (monomer component m3) having a group (R ⁵ ) having a predetermined number of carbon atoms.

  The content of the monomer component m3 in the polymer M (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 0.5 wt% or more and 98 wt% or less (for example, 2.5 wt% or more). 70 wt% or less), preferably 3 wt% or more and 50 wt% or less, more preferably 5 wt% or more and 40 wt% or less. When the content of the monomer component m3 in the polymer M is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components m1, m2, and the like. Can be expressed. On the other hand, when the content of the monomer component m3 in the polymer M is less than the lower limit, the effect of including the monomer component m3 may not be sufficiently exhibited. On the other hand, if the content of the monomer component m3 in the polymer M exceeds the upper limit, the content of the monomer components m1, m2, etc. may be relatively decreased, and these functions may not be sufficiently exhibited. There is sex. In addition, when the polymer M contains a plurality of types of monomer components m3, it is preferable that the sum of the content ratios of the plurality of types of monomer components m3 satisfies the above conditions. Further, when the polymer M is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component m3. can do. Moreover, when the polymer M is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component m3 at the above-described content.

Polymer ratio of the monomer component m1 in _{M (C m1 [wt%]} ) and the monomer ratio of the components _{m2 (C m2 [wt%]} ) , it is preferable to satisfy the following relationship. That is, C _m1 / C _m2 is preferably 2/98 or more and 98/2 or less, more preferably 20/80 or more and 95/5 or less, and 40/60 or more and 95/5 or less. Further preferred.
Further, the ratio of monomer component m1 in polymer M ( _Cm1 [wt%]) and the ratio of monomer component m3 ( _Cm3 [wt%]) preferably satisfy the following relationship. . That is, C _m1 / C _m3 is preferably 2/98 or more and 98/2 or less, more preferably 20/80 or more and 95/5 or less, and 40/60 or more and 95/5 or less. Further preferred.
Examples of the polymer M include those represented by the following formula (8).

  Moreover, the polymer M may contain components other than the monomer components m1, m2, and m3 described above. Thereby, for example, the effects derived from the chemical structures of other monomer components can be obtained while exhibiting the above-described characteristics. Examples of such components include monomer component m4, monomer component m5, monomer component m6, monomer component m7 and the like as described below.

(Monomer component m4)
The polymer M may contain the monomer component m4 ((meth) acrylic acid ester) represented by the following formula (4) as a monomer component.

By including the monomer component m4 in the polymer M, the solubility of the polymer M in the colored ink is excellent even when the dispersion medium constituting the colored ink is highly hydrophilic. And the transparency of the colored film formed using the colored ink can be made excellent.
In the monomer component m4, R ⁹ represents a hydrocarbon group having 1 to 15 carbon atoms which may have a hydrocarbon group-substituted oxy group, and the hydrocarbon group has 1 to 12 carbon atoms. It is preferable that: Examples of the hydrocarbon group represented by R ⁹ include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, octyl, 2-ethylhexyl, decyl group; Alicyclic hydrocarbon groups such as cyclohexyl, dicyclopentanyl and isobornyl groups; aryl groups such as phenyl groups; aralkyl groups such as benzyl, 1-phenylethyl and 2-phenylethyl groups; groups in which two or more of these are bonded, etc. Is mentioned.

  Examples of the hydrocarbon group-substituted oxy group that the hydrocarbon group having 1 to 15 carbon atoms may have include, for example, alkoxy groups such as methoxy and ethoxy groups (for example, alkoxy groups having 1 to 10 carbon atoms); Aryloxy group such as phenoxy group; alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group and dicyclopentanyloxy group; and 1 to 15 carbon atoms such as aralkyloxy group such as benzyloxy group (preferably, And a hydrocarbon group-substituted oxy group having 1 to 12 carbon atoms.

  Specific examples of the monomer component m4 include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, di Examples include cyclopentanyl (meth) acrylate, dicyclopentanyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, phenylethyl (meth) acrylate, and the like.

As described above, the carbon number of the hydrocarbon group (which may have a hydrocarbon group-substituted oxy group) included in the monomer component m4 (hereinafter also referred to as the carbon number of R ⁹ ) is 1 or more and 15 or less. However, it is particularly preferably 1 or more and 8 or less, and more preferably 1 or more and 4 or less. Thereby, the effect mentioned above is exhibited more notably.
Examples of the polymer M including the monomer component m4 as described above include those represented by the following formula (9).

(Monomer component m5)
The polymer M may contain the monomer component m5 which is an aromatic vinyl compound as a monomer component.
When the polymer M contains the monomer component m5, the discharge stability of the colored ink can be made particularly excellent. In addition, the colored film formed using the colored ink is particularly excellent in adhesion to the substrate, and problems such as cracks are less likely to occur.
Specific examples of the monomer component m5 include styrene, α-methylstyrene, vinyl toluene, vinyl naphthalene, vinyl biphenyl, and the like.

(Monomer component m6)
The polymer M may include a monomer component m6 that is a hydroxyl group-containing compound as a monomer component.
Specific examples of the monomer component m6 include 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, 2,3-dihydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxy. Polyhydric alcohol and acrylic acid such as hexyl (meth) acrylate, hydroxyalkyl (meth) acrylate such as 8-hydroxyoctyl (meth) acrylate, 4-hydroxymethylcyclohexyl (meth) acrylate, polyalkylene glycol mono (meth) acrylate, etc. Or a compound obtained by ring-opening polymerization of ε-caprolactone to a monoesterified product of methacrylic acid, a monoesterified product of the above polyhydric alcohol and acrylic acid or methacrylic acid, ethylene oxide, or propylene oxide. Ring-opening polymerized hydroxyl containing compounds, and the like to.

(Monomer component m7)
The polymer M may contain the monomer component m7 which is a vinyl compound having a 3- to 5-membered cyclic ether group as a monomer component.
The monomer component m7 (a vinyl compound having a 3- to 5-membered cyclic ether group) includes an oxirane ring (epoxy group) -containing polymerizable unsaturated compound, an oxetane ring (oxetanyl group) -containing polymerizable unsaturated compound, and an oxolane ring. (Oxolanyl group) -containing polymerizable unsaturated compounds are included.
When the polymer M contains the monomer component m7, it is possible to further improve the solvent resistance of the colored film formed using the colored ink, the adhesion to the substrate, and the like.

Examples of the oxirane ring (epoxy group) -containing polymerizable unsaturated compound include oxiranyl (meth) acrylate, glycidyl (meth) acrylate, 2-methylglycidyl (meth) acrylate, 2-ethylglycidyl (meth) acrylate, and 2-oxy Polymerizable unsaturated compounds containing an oxirane ring (monocyclic) such as ranylethyl (meth) acrylate, 2-glycidyloxyethyl (meth) acrylate, 3-glycidyloxypropyl (meth) acrylate, glycidyloxyphenyl (meth) acrylate, etc. ((Meth) acrylic acid ester derivatives and the like); 3,4-epoxycyclohexyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 2- (3,4-epoxycyclohexyl) ethyl (meth) acrylate, Epoxy group-containing alicyclic rings such as 3,4-epoxycyclohexane rings such as-(3,4-epoxycyclohexylmethyloxy) ethyl (meth) acrylate and 3- (3,4-epoxycyclohexylmethyloxy) propyl (meth) acrylate Polymerizable unsaturated compounds containing the formula carbocycle ((meth) acrylic acid ester derivatives and the like); 5,6-epoxy- such as 5,6-epoxy-2-bicyclo [2.2.1] heptyl (meth) acrylate Polymerizable unsaturated compounds containing a 2-bicyclo [2.2.1] heptane ring (such as (meth) acrylic acid ester derivatives); epoxidized dicyclopentenyl (meth) acrylate [3,4-epoxytricyclo [5. 2.1.0 ^2,6] decan-9-yl (meth) acrylate, 3,4-epoxytricyclo [5.2.1.0 ^2, ] Decan-8-yl (meth) acrylate or mixtures thereof,], epoxidized dicyclopentenyloxyethyl (meth) acrylate [2- (3,4-epoxytricyclo [5.2.1.0 ^2,6 ] Decan-9-yloxy) ethyl (meth) acrylate, 2- (3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yloxy) ethyl (meth) acrylate, or these Mixture], 3,4-epoxy tricyclo [5.2.1.0 ^2,6 ] decane ring such as epoxidized dicyclopentenyloxybutyl (meth) acrylate, epoxidized dicyclopentenyloxyhexyl (meth) acrylate, etc. Examples thereof include polymerizable unsaturated compounds (such as (meth) acrylic acid ester derivatives). As another oxirane ring (epoxy group) -containing polymerizable unsaturated compound, a vinyl ether compound containing an epoxy group, an allyl ether compound containing an epoxy group, an aromatic vinyl compound containing an epoxy group, or the like can also be used. Examples of the aromatic vinyl compound containing an epoxy group include styrene derivatives such as 4-vinylbenzylglycidyl ether, 4-vinylbenzyloxirane, 4-vinylphenethyloxirane.

Examples of the oxetane ring (oxetanyl group) -containing polymerizable unsaturated compound include oxetanyl (meth) acrylate, 3-methyl-3-oxetanyl (meth) acrylate, 3-ethyl-3-oxetanyl (meth) acrylate, (3- Methyl-3-oxetanyl) methyl (meth) acrylate, (3-ethyl-3-oxetanyl) methyl (meth) acrylate, 2- (3-methyl-3-oxetanyl) ethyl (meth) acrylate, 2- (3-ethyl -3-Oxetanyl) ethyl (meth) acrylate, 2-[(3-methyl-3-oxetanyl) methyloxy] ethyl (meth) acrylate, 2-[(3-ethyl-3-oxetanyl) methyloxy] ethyl (meta ) Acrylate, 3-[(3-Methyl-3-oxetanyl) methyloxy] propyl Pill (meth) acrylate, 3 - and [(3-ethyl-3-oxetanyl) methyloxy] propyl (meth) acrylate, vinyl ether compounds containing oxetanyl group, allyl ether compounds containing oxetanyl group.
Examples of the oxolane ring (oxolanyl group) -containing polymerizable unsaturated compound include tetrahydrofurfuryl (meth) acrylate, vinyl ether compounds containing an oxolanyl group, and allyl ether compounds containing an oxolanyl group.

When the polymer M constituting the colored ink contains the monomer component m7 as described above, a 3- to 5-membered cyclic ether group (oxirane ring (epoxy group), oxetane ring (oxetanyl group), oxolane ring ( The oxolanyl group)) acts as a curable group. The 3- to 5-membered cyclic ether group mainly contributes to improvement of chemical resistance (solvent resistance, alkali resistance, etc.).
When the polymer M contains at least one monomer component selected from the group consisting of the monomer components m4, m5, m6 and m7 in addition to the monomer components m1, m2 and m3, The total content of the monomer components m4, m5, m6 and m7 in the polymer M is preferably 60 wt% or less, more preferably 50 wt% or less, and further preferably 40 wt% or less. preferable. Thereby, the effect by including the monomer components m4, m5, m6, and m7 is exhibited while the effect by including the monomer components m1, m2, and m3 described above is sufficiently exhibited.

  The weight average molecular weight of the polymer M is preferably 500 or more and 100,000 or less, more preferably 1000 or more and 40000 or less, and further preferably 2000 or more and 30000 or less. As a result, the contrast ratio and lightness of the color filter manufactured using the color filter ink set (resin film forming ink) and the color filter ink set including the color ink can be made particularly excellent. The durability of the color filter can be made particularly excellent. Further, the storage stability (long-term stability) of the colored ink, the ejection stability, the solvent resistance of the formed colored film, and the like can be improved.

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer M is preferably 1 or more and 3 or less.
The content of the polymer M in the colored ink is preferably 0.1 wt% or more and 9.0 wt% or less, and more preferably 0.3 wt% or more and 7.5 wt% or less. Thereby, the effect by including the polymer M can be more effectively exhibited while fully exhibiting the functions of other components.

<Other ingredients>
The colored ink may contain components other than those described above. Examples of such components include the components exemplified in the other components as the constituent components of the color filter ink (resin film forming ink) of the present invention. Further, the colored ink may contain the polymer X and the polymer Y as described above.

  The viscosity of the colored ink at 25 ° C. (viscosity measured using a vibration viscometer) is not particularly limited, but is preferably 3 mPa · s or more and 12 mPa · s or less, preferably 4 mPa · s or more and 11 mPa · s or less. More preferably. When the viscosity of the colored ink is a value within the above range, in the liquid droplet ejection by the ink jet method, the variation in the appropriate amount of the colored ink to be ejected is made particularly small, and clogging in the liquid droplet ejection head is caused. It can prevent more reliably.

"Color filter"
Next, an example of a color filter manufactured using the color filter ink as described above will be described.
FIG. 1 is a cross-sectional view showing a preferred embodiment of the color filter of the present invention.
As shown in FIG. 1, the color filter 1 includes a substrate 11 and a colored portion 12 formed using the above-described color filter ink (and colored ink). As the colored portion 12, a first colored portion 12A, a second colored portion 12B, and a third colored portion 12C formed using different types of ink are provided. A partition wall 13 is provided between the adjacent colored portions 12. In the present embodiment, the first colored portion 12A, the second colored portion 12B, and the third colored portion 12C are different from the color filter ink (resin film forming ink) of the present invention. Although it may be formed using a colored ink (colored film forming ink), in the following description, each colored portion is added to the color filter ink of the present invention (resin film forming ink), A case where the first colored portion 12A is formed using red ink, the second colored portion 12B is formed using green ink, and the third colored portion 12C is formed using blue ink. Explained.

<Board>
The substrate 11 is a plate-like member having optical transparency, and has a function of holding the colored portion 12 and the partition wall 13.
The substrate 11 is preferably made of a substantially transparent material. Thereby, a clearer image can be formed by the light transmitted through the color filter 1.

  The substrate 11 is preferably excellent in heat resistance and mechanical strength. Thereby, for example, deformation due to heat applied during the manufacture of the color filter 1 can be reliably prevented. Examples of the constituent material of the substrate 11 that satisfies such conditions include glass, silicon, polycarbonate, polyester, aromatic polyamide, polyamideimide, polyimide, norbornene-based ring-opening polymer, and hydrogenated products thereof.

<Coloring part>
The colored portion 12 is formed using the color filter ink and the colored ink as described above.
Each colored portion 12 (first colored portion 12A, second colored portion 12B, and third colored portion 12C) is formed using the color filter ink and the colored ink as described above.
Each colored portion 12 is provided in a cell 14 which is a region surrounded by a partition wall 13 which will be described later.

  Each colored portion 12 includes a colored film 121 formed using the colored ink and a resin film 122 formed using the color filter ink, and has a flat surface. It is excellent in properties and the generation of bubbles is effectively prevented. As a result, the display image of the color filter 1 is excellent in brightness and contrast ratio, and generation of uneven color and uneven density is suppressed. Further, by having the resin film 122 separately from the colored film 121, the durability of the color filter 1 and the voltage holding ratio of the liquid crystal layer of the liquid crystal display device including the color filter are particularly excellent. it can. Further, with the configuration as described above, it is possible to adjust the thickness of the resin film 122 that hardly affects the color of the display image while making the pigment content in each colored portion suitable. The thickness of the colored portions (12A, 12B, 12C) of each color can be made uniform easily and reliably. For this reason, when such a color filter 1 is used for an image display device as described later, a common electrode provided on the surface of the coloring portion 12 and the partition wall 13 opposite to the surface facing the substrate 11 has Due to the difference in level between the colored portion 12 and the partition wall 13, it is possible to reliably prevent the occurrence of problems such as disconnection.

By the way, in order to prevent the disconnection of the common electrode as described above, a flattened film made of a transparent resin material is formed between the colored portion and the partition wall and the common electrode to prevent the disconnection of the common electrode. Conceivable. However, when such a color filter is used in an image display device, when light passes through the color filter, a part of the light is easily reflected on the planarization film, and the light that has been repeatedly reflected is reflected by other The colored portion is transmitted. As a result, the light that has been repeatedly reflected is transmitted through other colored portions other than the colored portion to be transmitted, and the resulting image is unclear in shape and color tone. On the other hand, in the present invention, occurrence of such a problem can be reliably prevented.
In addition, the colored film 121 is disposed in a portion in contact with the substrate 11 in the colored portion 12. Thus, by providing the colored film 121 along the substrate 11, the colored film 121 becomes particularly smooth, and the color filter 1 has a particularly suppressed density unevenness and color unevenness at each part. Become.

  The first colored portion 12A, the second colored portion 12B, and the third colored portion 12C are of different colors. For example, the first colored portion 12A can be a red filter region (R), the second colored portion 12B can be a green filter region (G), and the third colored portion 12C can be a blue filter region (B). One set of colored portions 12A, 12B, and 12C of different colors constitutes one pixel. In the color filter 1, a predetermined number of colored portions 12 are arranged in the horizontal direction and the vertical direction. For example, when the color filter 1 is a high-definition color filter, 1366 × 768 pixels are arranged, and when the color filter 1 is a full high-definition color filter, 1920 × 1080 pixels are arranged. In the case of a super high vision color filter, 7680 × 4320 pixels are arranged. Note that the color filter 1 may be provided with a spare pixel outside the effective area, for example.

<Partition wall>
A partition wall (bank) 13 is provided between the adjacent colored portions 12. Thereby, it can prevent reliably that the adjacent coloring parts 12 will mix colors, As a result, a clear image can be displayed reliably.
The partition wall 13 may be made of a transparent material, but is preferably made of a light-shielding material. Thereby, an image with excellent contrast can be displayed. The color of the partition wall (light shielding part) 13 is not particularly limited, but is preferably black. Thereby, the contrast of the displayed image can be made particularly excellent.

  The height of the partition wall 13 is not particularly limited, but is preferably substantially the same as the film thickness of the colored portion 12. Thereby, the color mixture between the adjacent coloring parts 12 can be prevented reliably. The specific thickness of the partition wall 13 is preferably 0.1 μm or more and 10 μm or less, and more preferably 0.5 μm or more and 3.5 μm or less. As a result, color mixing between the adjacent colored portions 12 can be reliably prevented, and the viewing angle characteristics of the image display device and electronic apparatus including the color filter 1 can be improved.

  The partition wall 13 may be made of any material, but for example, is preferably made mainly of a resin material. Thereby, the partition wall 13 can be easily formed as having a desired shape by a method as described later. Moreover, when the partition 13 has a function as a light-shielding part, it may include a light-absorbing material such as carbon black as a constituent material.

《Color filter manufacturing method》
Next, the manufacturing method of the color filter of this invention is demonstrated.
FIG. 2 is a cross-sectional view showing a preferred embodiment of a method for manufacturing a color filter, and FIG. 3 is a perspective view showing a droplet discharge device used for manufacturing the color filter.
As shown in FIG. 2, the color filter manufacturing method of the present embodiment includes a substrate preparation step (1a) for preparing the substrate 11, a partition formation step (1b, 1c) for forming the partition 13 on the substrate 11, A colored ink application step (1d) for applying a colored ink (colored film forming ink) 21 to a region (cell 14) surrounded by the partition wall 13 by an inkjet method, and a dispersion medium from the colored ink 21 discharged into the cell 14 A colored film forming step (1e) for forming a colored film 121, and a color filter ink (resin film forming ink) in the cell in which the colored ink 21 is discharged (in the cell in which the colored film 121 is formed) ) Color filter ink application step (1f) for discharging 22 and resin for removing the solvent from the color filter ink 22 discharged into the cell 14 to form the resin film 122 And a forming step (1 g). Thereby, it is possible to efficiently manufacture the color filter 1 that is excellent in durability, excellent in brightness and contrast ratio, and in which generation of uneven color and uneven density is suppressed. Further, by dividing and applying the ink to form one colored portion 12, variation in the ink volume due to error diffusion can be suppressed, and streaks can be more effectively prevented. Further, by forming the resin film 122 separately from the colored film 121, the voltage holding ratio of the liquid crystal layer of the liquid crystal display device including the color filter 1 can be made particularly excellent. Also, the colored ink (colored film forming ink) 21 and the color filter ink (resin film forming ink) 22 are separately ejected into the cell, thereby reliably preventing the viscosity of each ink from increasing. And the ejection stability of each ink can be made excellent. In addition, when used in an image display device, since the thickness of each colored portion 12 is uniform, even when a common electrode is provided, the disconnection of the common electrode is surely prevented, and an appropriate and clear display is achieved. It will be obtained.

Hereinafter, each step will be described in detail.
<Board preparation process>
First, the substrate 11 is prepared (1a). The substrate 11 prepared in this step is preferably subjected to a cleaning process. In addition, the substrate 11 prepared in this step has been subjected to appropriate pretreatment such as chemical treatment with a silane coupling agent or the like, plasma treatment, ion plating, sputtering, gas phase reaction method, vacuum deposition, and the like. Also good.

<Partition forming process>
Next, the radiation-sensitive composition for forming the partition walls of the substrate 11 is applied to almost the entire one surface of the substrate 11 to form the coating film 3 (1b). In addition, after giving a radiation sensitive composition on the board | substrate 11, you may perform a prebaking process as needed.
Then, the partition 13 is formed by performing a post-exposure baking process (PEB) by irradiating with a radiation through a photomask, and further performing a developing process using an alkaline developer (1c).

  Moreover, you may perform a liquid-repellent process with respect to the coating film 3 before image development processing. For example, before the development treatment, a fluororesin may be applied to the coating film 3 by a stamp method or the like, and fluorine is doped on the surface of the coating film 3 (radiation sensitive composition) by plasma polymerization treatment. Also good. By performing such treatment, only the bank surface (upper surface in the drawing, the portion excluding the inner wall surface) is made liquid repellent, contributing to further planarization of the surface of the colored portion 12 formed in a later step. Further, a fluororesin having a light specific gravity may be added to the radiation-sensitive composition so as to be oriented only on the surface.

<Coloring ink application process>
Next, the colored ink 21 is applied to the cell 14 surrounded by the partition wall 13 by an inkjet method (1d).
This step is performed using a plurality of types of colored inks 21 corresponding to a plurality of colored films 121 to be formed. At this time, since the partition wall 13 is provided, it is reliably prevented that two or more kinds of the colored inks 21 are mixed.

In the present embodiment, the color ink 21 is discharged using a droplet discharge device as shown in FIG.
As shown in FIG. 3, the droplet discharge device 100 used in this step includes a tank 101 that holds the colored ink 21, a tube 110, and a discharge scanning unit to which the colored ink 21 is supplied from the tank 101 via the tube 110. 102. The ejection scanning unit 102 includes a droplet ejection unit 103 in which a plurality of droplet ejection heads (inkjet heads) are mounted on a carriage, and a first position control device 104 (moving unit) that controls the position of the droplet ejection unit 103. A stage 106 that holds the substrate 11 (hereinafter also simply referred to as “substrate 11”) on which the partition wall 13 is formed in the above-described process, and a second position control device 108 (moving means) that controls the position of the stage 106. The control means 112 is provided. The tank 101 and the plurality of droplet discharge heads in the droplet discharge means 103 are connected by a tube 110, and the colored ink 21 is supplied from the tank 101 to each of the plurality of droplet discharge heads by compressed air.

  The first position control device 104 moves the droplet discharge means 103 along the X-axis direction and the Z-axis direction orthogonal to the X-axis direction in response to a signal from the control means 112. Further, the first position control device 104 also has a function of rotating the droplet discharge means 103 around an axis parallel to the Z axis. In the present embodiment, the Z-axis direction is a direction parallel to the vertical direction (that is, the direction of gravitational acceleration). The second position controller 108 moves the stage 106 along the Y-axis direction orthogonal to both the X-axis direction and the Z-axis direction in response to a signal from the control unit 112. Further, the second position control device 108 also has a function of rotating the stage 106 around an axis parallel to the Z axis.

The stage 106 has a plane parallel to both the X-axis direction and the Y-axis direction. The stage 106 is configured so that the substrate 11 having the cells 14 to which the colored ink 21 is to be applied can be fixed or held on the plane.
As described above, the droplet discharge means 103 is moved in the X-axis direction by the first position control device 104. On the other hand, the stage 106 is moved in the Y-axis direction by the second position control device 108. That is, the first position control device 104 and the second position control device 108 change the relative position of the droplet discharge head with respect to the stage 106 (the substrate 11 held on the stage 106 and the droplet discharge means 103 are relatively Moving).
The control unit 112 is configured to receive ejection data representing a relative position where the colored ink 21 is to be ejected from an external information processing apparatus.

  Using the droplet discharge device 100 as described above, the colored ink 21 corresponding to the colored films 121 of a plurality of colors that the color filter 1 has is applied to the cells 14. By using the apparatus as described above, the colored ink 21 can be efficiently and selectively applied to the cells 14. In the configuration shown in the drawing, the droplet discharge device 100 has only one color of the tank 101 that holds the colored ink 21, the tube 110, etc., but these members are provided in a plurality of colors that the color filter 1 has. It may have a plurality of colors corresponding to the coloring portion 12. In manufacturing the color filter 1, a plurality of droplet discharge devices 100 corresponding to the colored inks 21 of a plurality of colors may be used.

In addition, as described above, when the constituent material of the colored portion 12 is separately contained in the colored ink 21 and the color filter ink 22, the discharge stability of the colored ink 21 and the color filter ink 22 is particularly excellent. Can be. For this reason, when droplets are discharged as described above, it is possible to reliably prevent an unintentional variation in the droplet amount of the colored ink 21 applied to each cell 14.
The droplet discharge head may use an electrostatic actuator instead of a piezo element as a drive element. The droplet discharge head may be configured to use an electrothermal conversion element as a drive element and discharge the colored ink 21 by utilizing thermal expansion of a material by the electrothermal conversion element.

<Colored film formation process>
Next, the dispersion medium is removed from the colored ink 21 in the cell 14 (1e). Thus, by removing the dispersion medium from the colored ink 21, the fluidity of the colored ink 21 can be lost and the colored film 121 can be formed. When the dispersion medium is removed and the colored film 121 is formed in this step, the colored ink 21 is also applied when the color filter ink (resin film forming ink) 22 is applied in the subsequent color filter ink applying step. Is reliably prevented from diffusing into the applied color filter ink 22. As a result, the colored portion 12 having a configuration including the colored film 121 and the resin film 122 can be formed, and the effects described above are exhibited.

The dispersion medium is usually removed by heating.
This step is preferably performed at a temperature of 230 ° C. or higher for 30 minutes or longer. Thereby, it can prevent more reliably that a bubble is contained in the coloring part 12 to be formed, and as a result, the contrast of a display image using the color filter 1 is more reliably improved. Can do. Further, in this step, the dispersion medium is reliably removed, and the colored film 121 in which the elution of the components into the color filter ink 22 hardly occurs can be formed more reliably. In addition, it is possible to reliably prevent adverse effects on the substrate 11 and the like.

In this step, the substrate 11 to which the colored ink 21 is applied may be in a reduced pressure environment. As a result, the dispersion medium can be removed efficiently while preventing adverse effects on the substrate 11 and the like. In particular, by performing this step on the substrate 11 to which the colored ink 21 has been applied in a reduced pressure environment, the processing temperature in this step can be made relatively low, effectively preventing the decomposition of organic matter and the like. In addition, the dispersion medium can be reliably removed.
In this step, energy irradiation such as ultraviolet rays, electron beams, or radiation may be performed.

<Ink application process for color filter>
Next, color filter ink (resin film forming ink) 22 is applied to the cells 14 (1f).
As described above, the dispersion medium is removed from the colored ink 21 in the cell 14, and the colored film 121 is formed. For this reason, when the color filter ink 22 is applied to the cell 14 to which the colored ink 21 is applied (the cell 14 on which the colored film 121 is formed), the components of the color ink 21 and the components of the color filter ink 22 Is prevented from being mixed, and the colored portion 12 having a laminated structure of the colored film 121 and the resin film 122 can be reliably formed. Further, as described above, since some of the constituent components of the colored portion 12 are included in the colored ink 21, the discharge stability of the droplets of the color filter ink 22 can be improved. As a result, since a desired amount of the color filter ink 22 can be reliably landed on the target position, it is possible to prevent unintentional thickness variations of the colored portions 12 in the final color filter 1. Can do. Moreover, since high-speed drawing by the inkjet method is possible, the productivity of the color filter 1 as a whole can be made particularly excellent.

By the way, the colored film formed in the above-mentioned process contains a lot of pigments and usually has many fine pores. Such a colored film is easy to absorb moisture, and when a resin film is formed simply by applying a composition containing the polymer X and the polymer Y on the colored film, the colored part finally formed is the surface. The flatness of the image is low, the brightness and contrast ratio of the image displayed using the manufactured color filter are low, and the color unevenness, the density unevenness, etc. become remarkable. On the other hand, in the present invention, the color filter ink (resin film forming ink) contains the compound S in addition to the polymer X and the polymer Y as described above. It is possible to suitably form a resin film having excellent adhesion and high surface flatness. As a result, the occurrence of the above-described problems can be effectively prevented, and the display image of the manufactured color filter can be made excellent in contrast and the like. Further, since the color filter ink has the above-described configuration, the resin molecules constituting the resin film can have a network structure suitably formed, and the durability (solvent resistance) of the entire colored portion can be improved. Etc.) can be made particularly excellent.
In contrast, when the color filter ink (resin film forming ink) does not have the above-described configuration, the above-described excellent effects cannot be obtained.

The application of the color filter ink 22 into the cells 14 is performed by an ink jet type droplet discharge device, and is performed by the same method as the colored ink 21 using the droplet discharge device 100 as described above. Can do.
Further, among the cells to which the plurality of colored inks 21 are applied, the color filter ink 22 is applied most to the cells to which the colored ink 21 having the least solid content is applied. Is preferred. Thereby, the thickness of the colored part 12 can be adjusted easily and reliably, and a color filter in which the thickness of the colored part 12 is particularly uniform can be manufactured. For this reason, the obtained color filter 1 is one in which uneven density and uneven color of each part are particularly suppressed. Further, when such a color filter 1 is used in an image display device described later, a common electrode provided on the surface of the coloring portion 12 and the partition wall 13 opposite to the surface facing the substrate 11 is colored. Due to the level difference between the portion 12 and the partition wall 13, it is possible to reliably prevent the occurrence of problems such as disconnection.
In particular, in the cell 14 to which a plurality of types of colored inks 21 have been applied, it is preferable that the color filter ink 22 be applied in a larger amount as the cell 14 has a lower solid content. Thereby, the thickness of the colored part 12 to be formed can be made particularly uniform.

<Resin film formation process>
Next, the solvent is removed from the color filter ink 22 in the cell 14 to form the resin film 122, and the colored portion 12 including the colored film 121 and the resin film 122 is obtained (1g). Thereby, the color filter 1 is obtained.
Here, since the color filter ink 22 contains the compound S together with the polymer X and the polymer Y, the formed colored portion 12 (resin film 122) has a high surface flatness and a uniform thickness. It will have. As a result, it is possible to sufficiently prevent the occurrence of color unevenness, density unevenness and the like in each part of the produced color filter 1, and to make the characteristics uniform among individuals.
Further, the surface of the colored film 121 made of a material containing a pigment is covered with the resin film 122, whereby the solvent resistance of the color filter 1 and the voltage holding ratio of the liquid crystal layer of the liquid crystal display device including the color filter 1 are obtained. Etc. can be made particularly excellent. Further, it is possible to obtain a color filter 1 in which the uniformity of the thickness of each colored portion 12 is particularly high.

The removal of the solvent can be performed by heating, for example.
When removing the solvent by heating, the temperature of the substrate 11 is preferably 60 ° C. or higher and 260 ° C. or lower, and more preferably 180 ° C. or higher and 250 ° C. or lower. Thereby, the solvent can be efficiently removed from the color filter ink 22. In addition, it is possible to reliably prevent adverse effects on the substrate 11 and the like. Further, the curing reaction of the curable resin material (polymer X, polymer Y, etc.) contained in the color filter ink can be surely advanced, and the reliability and durability of the manufactured color filter 1 are particularly excellent. Can be.

In this step, the substrate 11 to which the color filter ink 22 is applied may be in a reduced pressure environment. As a result, the solvent can be efficiently removed while preventing adverse effects on the substrate 11 and the like.
In this step, energy irradiation such as ultraviolet rays, electron beams, or radiation may be performed.

<Image display device>
Next, a preferred embodiment of a liquid crystal display device that is an image display device (electro-optical device) having the color filter 1 will be described.
FIG. 4 is a cross-sectional view showing a preferred embodiment of the liquid crystal display device. As shown in the figure, the liquid crystal display device 60 includes a color filter 1, a substrate (opposite substrate) 66 disposed on the side of the color filter 1 on which the colored portion 12 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the side opposite to the surface of the substrate 11 of the color filter 1 facing the liquid crystal layer 62 (lower side in FIG. 4). And a polarizing plate 68 provided on the side of the substrate 66 opposite to the surface facing the liquid crystal layer 62 (upper side in FIG. 4). A common electrode 61 is provided on the surface of the color filter 1 on which the colored portion 12 and the partition wall 13 are provided (the surface opposite to the surface of the colored portion 12 and the partition wall 13 facing the substrate 11). On the surface of the (opposite substrate) 66 facing the liquid crystal layer 62 and the color filter 1, pixel electrodes 65 are arranged in a matrix at positions corresponding to the colored portions 12 of the color filter 1. Further, an alignment film 64 is provided between the common electrode 61 and the liquid crystal layer 62, and an alignment film 63 is provided between the substrate 66 (pixel electrode 65) and the liquid crystal layer 62.
The substrate 66 is a substrate having optical transparency with respect to visible light, and is, for example, a glass substrate.
The common electrode 61 and the pixel electrode 65 are made of a material having optical transparency to visible light, and are made of, for example, ITO.

  Thus, in the liquid crystal display device 60 provided with the color filter 1, each coloring part 12 which comprises the color filter 1 has a uniform thickness. In the liquid crystal display device 60 provided with such a color filter 1, the height difference (step) between the colored portions 12 and the partition walls 13 is uniform throughout the color filter 1. Therefore, the common electrode 61 is difficult to be disconnected, and the liquid crystal display device 60 can perform image display reliably and appropriately. Further, even when heat or an external impact is applied to the liquid crystal display device 60, it is possible to reliably prevent problems such as disconnection of the common electrode 61 disposed on the liquid crystal layer 62 side of the color filter 1. Therefore, the durability of the liquid crystal display device 60 is excellent. Further, the color filter 1 of the liquid crystal display device 60 does not have a flattening film that covers the entire surface of the substrate 11 on the partition wall 13, and therefore can irradiate light only on a target colored portion with certainty. It becomes. As a result, the liquid crystal display device can widen the color reproduction range, and can appropriately display an image with a clear shape, color tone, and the like.

  Although omitted in the drawing, a plurality of switching elements (for example, TFTs: thin film transistors) are provided so as to correspond to the respective pixel electrodes 65. For each pixel electrode 65 corresponding to each coloring portion 12, by controlling the voltage application state between the common electrode 61, in the region corresponding to each coloring portion 12 (each pixel electrode 65), Light transmittance can be controlled.

In the liquid crystal display device 60, light emitted from a backlight (not shown) enters from the polarizing plate 68 side (upper side in FIG. 4). And the light which permeate | transmitted the liquid crystal layer 62 and entered into each coloring part 12 (12A, 12B, 12C) of the color filter 1 is polarized as light of the color corresponding to each coloring part 12 (12A, 12B, 12C). The light is emitted from the plate 67 (lower side in FIG. 4).
Since the liquid crystal display device 60 includes the color filter 1 manufactured using the color filter ink of the present invention as described above, the occurrence of uneven color, uneven density, etc. is prevented, and the brightness and contrast ratio are improved. An excellent image can be stably displayed over a long period of time.

"Electronics"
An image display device (electro-optical device) 1000 such as a liquid crystal display device having the color filter 1 as described above can be used for display portions of various electronic devices.
FIG. 5 is a perspective view showing a configuration of a mobile (or notebook) personal computer to which the electronic apparatus of the present invention is applied.
In this figure, a personal computer 1100 includes a main body 1104 having a keyboard 1102 and a display unit 1106. The display unit 1106 is supported by the main body 1104 via a hinge structure so as to be rotatable. Yes.
In the personal computer 1100, the display unit 1106 includes an image display device 1000.
FIG. 6 is a perspective view showing a configuration of a mobile phone (including PHS) to which the electronic apparatus of the present invention is applied.
In this figure, a cellular phone 1200 is provided with an image display device 1000 in a display unit, together with a plurality of operation buttons 1202, an earpiece 1204, and a mouthpiece 1206.

FIG. 7 is a perspective view showing the configuration of a digital still camera to which the electronic apparatus of the present invention is applied. In this figure, connection with an external device is also simply shown.
Here, a normal camera sensitizes a silver halide photographic film with a light image of a subject, whereas a digital still camera 1300 photoelectrically converts a light image of a subject with an image sensor such as a CCD (Charge Coupled Device). An imaging signal (image signal) is generated.

On the back of the case (body) 1302 in the digital still camera 1300, an image display device 1000 is provided in the display unit, and is configured to display based on an imaging signal from the CCD, and a finder that displays a subject as an electronic image. Function as.
A circuit board 1308 is installed inside the case. The circuit board 1308 is provided with a memory that can store (store) an imaging signal.

A light receiving unit 1304 including an optical lens (imaging optical system), a CCD, and the like is provided on the front side of the case 1302 (on the back side in the illustrated configuration).
When the photographer confirms the subject image displayed on the display unit and presses the shutter button 1306, the CCD image pickup signal at that time is transferred and stored in the memory of the circuit board 1308.

  In the digital still camera 1300, a video signal output terminal 1312 and an input / output terminal 1314 for data communication are provided on the side surface of the case 1302. As shown in the figure, a television monitor 1430 is connected to the video signal output terminal 1312 and a personal computer 1440 is connected to the input / output terminal 1314 for data communication as necessary. Further, the imaging signal stored in the memory of the circuit board 1308 is output to the television monitor 1430 or the personal computer 1440 by a predetermined operation.

  The electronic apparatus of the present invention includes, for example, a television (for example, a liquid crystal television), a video camera, a viewfinder type, a monitor in addition to the above-described personal computer (mobile personal computer), mobile phone, and digital still camera. Direct-view video tape recorder, laptop personal computer, car navigation system, pager, electronic notebook (including communication function), electronic dictionary, calculator, electronic game device, word processor, workstation, videophone, security TV monitor , Electronic binoculars, POS terminals, devices equipped with touch panels (for example, cash dispensers of financial institutions, automatic ticket vending machines), medical devices (for example, electronic thermometers, blood pressure monitors, blood glucose meters, electrocardiographic display devices, ultrasonic diagnostic devices, endoscopy) Mirror display device), Group detector, various measuring instruments, gages (e.g., gages for vehicles, aircraft, and ships), a flight simulator, various monitors such, can be applied to the projection type display device such as a projector. In particular, televisions have a remarkable tendency to increase the size of the display unit in recent years. However, in an electronic device having such a large display unit (for example, a display unit having a diagonal length of 80 cm or more), uneven color and uneven density are present. Although it tends to be conspicuous, the application of the present invention can surely prevent the occurrence of such a problem. That is, when applied to an electronic device having a large display unit as described above, the effects of the present invention are more remarkably exhibited.

As mentioned above, although this invention was demonstrated based on suitable embodiment, this invention is not limited to these.
For example, in the above-described embodiment, after the colored ink corresponding to the colored portion of each color is applied to the cell, the dispersion medium is removed from the colored ink in the cell at once, that is, the colored film forming step is performed. Although described as being performed only once, the colored ink applying step and the colored film forming step may be performed repeatedly corresponding to each color.
Further, for example, the color ink applying step and the color filter ink applying step may be performed a plurality of times, respectively.
In addition, each unit constituting the color filter, the image display device, and the electronic device can be replaced with an arbitrary one that exhibits the same function, or another configuration can be added.

  In the above-described embodiment, the case where three types (three colors) of colored ink corresponding to the three primary colors of light and one type of color filter ink are used as the ink for forming the colored portion has been mainly described. The number and type (color) of the color ink and the color filter ink used for forming the colored portion of the filter are not limited to those described above. For example, in the production of a color filter (formation of a colored portion), four or more kinds of colored inks may be used, or two or more kinds of color filter inks (resin film forming ink) may be used. Further, for example, the composition may be different for each of a plurality of types of color filter inks so as to correspond to a plurality of types of colored inks.

Next, specific examples of the present invention will be described.
[1] Synthesis of polymer (Synthesis Example 1)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 314 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added and heated to 90 ° C. Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN) as a radical initiator: 20 parts by weight and diethylene glycol monobutyl ether acetate (solvent): 30 parts by weight were added to the flask. The monomer component (compound) represented by the formula (11) x1: 180 parts by weight, the monomer component (compound) x2 represented by the formula (12): 90 parts by weight, the formula (13) Monomer component (compound) x3: 15 parts by weight, monomer component (compound) x4: 15 parts by weight represented by the above formula (14), 2,2'-azobis (isobutyronitrile) ) (AIBN): A solution prepared by dissolving 50 parts by weight of diethylene glycol monobutyl ether acetate: 200 parts by weight was added dropwise using a dropping pump over 5 hours, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer X1 as the polymer X represented by the said Formula (19) including the monomer components x1, x2, x3, x4.
(Synthesis Examples 2 to 8)
The same operation as in Synthesis Example 1 was performed except that the type of solvent (solvent) used in the synthesis of the polymer and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. As a result, seven types of polymers X (polymers X2 to X8) were obtained.

(Synthesis Example 9)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 314 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added and heated to 90 ° C. Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN) as a radical initiator: 20 parts by weight and diethylene glycol monobutyl ether acetate (solvent): 30 parts by weight were added to the flask. , Monomer component (compound) y1: 200 parts by weight represented by formula (15), monomer component (compound) y2 represented by formula (16): 100 parts by weight, 2,2′- A solution prepared by dissolving 50 parts by weight of azobis (isobutyronitrile) (AIBN) in 200 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise over 5 hours using a dropping pump, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer Y1 as the polymer Y containing the monomer components y1 and y2 and represented by the said Formula (20).
(Synthesis Examples 10 and 11)
The same operation as in Synthesis Example 9 was performed except that the type of solvent (solvent) used in the synthesis of the polymer and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. As a result, two types of polymers Y (polymers Y2 and Y3) were obtained.

(Synthesis Example 12)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 100 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added and heated to 80 ° C. Subsequently, 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) as the monomer component m1 was placed in the flask. ) Methacrylate): 60 parts by weight, methacrylic acid as monomer component m2: 20 parts by weight, stearyl methacrylate as monomer component m3: 20 parts by weight in diethylene glycol monobutyl ether acetate: 30 parts by weight It dropped in the flask over 4 hours using the dripping pump. On the other hand, a solution prepared by dissolving 5 parts by weight of azobisdimethylvaleronitrile as a radical initiator (polymerization initiator) in 90 parts by weight of diethylene glycol monobutyl ether acetate was added to the flask for 4 hours using another dropping pump. It was dripped in. After completion of the dropping of the polymerization initiator, the temperature is maintained (aged) at the same temperature for 4 hours, and then cooled to room temperature, and the monomer component m1, m2, m3 is represented by the above formula (8) A polymer M1 as a combined M was obtained.
(Synthesis Examples 13 to 19)
The same operation as in Synthesis Example 12 except that the solvent (solvent) used in the synthesis of the polymer, the types of monomer components, the ratio of each component were adjusted, and the composition of the polymer was changed as shown in Table 1. Went. As a result, seven types of polymers M (polymers M2 to M8) were obtained.

(Synthesis Examples 20-22)
The same operation as in Synthesis Example 1 was performed except that the types of monomer components used in the synthesis of the polymer and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. As a result, three types of polymers X ′ (polymers X′1 to X′3) were obtained.
(Synthesis Example 23)
The same operation as in Synthesis Example 9 was performed except that the types of monomer components used in the synthesis of the polymer and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. As a result, a polymer Y′1 was obtained.

In Table 1, the ratio of each monomer component which comprises each polymer synthesize | combined in the synthesis examples 1-23, and the weight average molecular weight Mw of each polymer were shown collectively. In the table, methacrylic acid 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) methacrylate) is represented by “m1a” and methacrylic acid. 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl is denoted by “m1b”, 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl acrylate is denoted by “m1c”, Methacrylic acid is indicated by “m2a”, acrylic acid is indicated by “m2b”, stearyl methacrylate is indicated by “m3a”, behenyl methacrylate is indicated by “m3b”, palmityl acrylate is indicated by “m3c”, and lignoceryl methacrylate is indicated. Indicated as “m3d”, methyl methacrylate as “m4a”, acrylic Ethyl is indicated by “m4b”, pentyl acrylate is indicated by “m4c”, styrene is indicated by “m5”, 2-hydroxyethyl methacrylate is indicated by “m6”, and 3,4-epoxytricyclo [5.2. A mixture of 1.0 ^2,6 ] decan-9-yl acrylate and 3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yl acrylate was designated “m7”. The polymers synthesized as described above all had a dispersity (weight average molecular weight Mw / number average molecular weight Mn) in the range of 1 or more and 3 or less.

[2] Preparation of color filter ink (Example 1)
Polymer M1, Polymer X1, Polymer Y1, Compound represented by Formula (21) as Compound S, LHP-95 (manufactured by Enomoto Kasei Co., Ltd.), diethylene glycol monobutyl ether acetate and methoxy as solvents By mixing with butyl acetate, a color filter ink (resin film forming ink) was obtained.
(Examples 2 to 11)
A color filter ink was prepared in the same manner as in Example 1 except that the types and amounts of materials used for preparing the color filter ink were as shown in Table 2.
(Comparative Examples 1-7)
A color filter ink was prepared in the same manner as in Example 1 except that the types and amounts of materials used for preparing the color filter ink were as shown in Table 2.

Table 2 summarizes the types and contents of the constituent components of the color filter inks of the respective Examples and Comparative Examples. In the table, the compound S represented by the formula (21) is “S1”, the compound S represented by the formula (22) is “S2”, the compound S represented by the formula (23) is “S3”, the formula (24 ) Is represented by “S4”, compound S represented by formula (25) is “S5”, compound S represented by formula (26) is “S6”, diethylene glycol monobutyl ether acetate is “L1”, 1, 3-butylene glycol diacetate is “L2”, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate is “L3”, triethylene glycol mononormal butyl ether is “L4”, and methoxybutyl acetate is “ L5 ”,“ L6 ”for dipropylene glycol dimethyl ether, and“ LHP95 ”for LHP-95 (manufactured by Enomoto Kasei Co., Ltd.) as a leveling agent.
In addition, the viscosity at 25 ° C. of the color filter inks of the above Examples measured using a vibration viscometer according to JIS Z8809 is 3.0 mPa · s to 7.0 mPa · s. The value was within the range.

[3] Stability evaluation of droplet discharge (Evaluation of discharge stability)
The color filter inks of the respective Examples and Comparative Examples were evaluated by the following tests.
[3.1] Evaluation of Landing Position Accuracy Prepared are a droplet discharge device as shown in FIG. 3 installed in a chamber (thermal chamber) and color filter inks of each of the examples and comparative examples, and vibration of the piezo element. In a state where the number was 5 kHz and the driving waveform was optimized, 3 million droplets (3000000 droplets) were continuously ejected from each nozzle of the droplet ejection head for each ink. For the 3000000 droplets ejected from the specified nozzle near the center of the droplet ejection head, the average value of the deviation amounts d from the center aiming position of the center position of each landed droplet is obtained, and the following five steps Evaluation was performed according to the criteria of It can be said that the smaller the value is, the more effectively the occurrence of flight bending is prevented.

A: The average value of the shift amount d is less than 0.05 μm.
B: The average value of the shift amounts d is 0.05 μm or more and less than 0.10 μm.
C: The average value of the shift amounts d is 0.10 μm or more and less than 0.13 μm.
D: The average value of the shift amount d is 0.13 μm or more and less than 0.16 μm.
E: The average value of the shift amounts d is 0.16 μm or more.

[3.2] Stability evaluation of droplet discharge amount Prepared are a droplet discharge device as shown in FIG. 3 installed in a chamber (thermal chamber) and color filter inks of the respective examples and comparative examples, With the frequency of the piezo element set to 5 kHz and the drive waveform optimized, 4 million droplets (4000000 droplets) were continuously ejected from each nozzle of the droplet ejection head for each ink. For the two specified nozzles on the left and right ends of the droplet discharge head, the total weight of the discharged droplets is obtained, and the absolute value ΔW [ng] of the difference between the average discharge amounts of the droplets discharged from the two nozzles is calculated. Asked. A ratio (ΔW / W _T ) of ΔW with respect to the target discharge amount W _T [ng] of the droplet was obtained and evaluated according to the following five-stage criteria. As the value of [Delta] W / W _T is small, it can be said that the greater the stability of the droplet discharge amount.

A: The value of ΔW / _{W T} is less than 0.050.
B: The value of ΔW / _{W T} is less than 0.050 than 0.250.
C: The value of ΔW / _{W T} is less than 0.250 than 0.550.
D: The value of ΔW / _{W T} is less than 0.550 than 0.780.
E: The value of ΔW / _{W T} is 0.780 or more.

[3.3] Evaluation of intermittent printing performance A droplet discharge device as shown in FIG. 3 installed in a chamber (thermal chamber) and inks for color filters of the above-described examples and comparative examples are prepared, and vibrations of the piezo element are obtained. In a state where the number is 5 kHz and the driving waveform is optimized, 10000 droplets (10000 droplets) are continuously discharged from each nozzle of the droplet discharge head for each ink, and then the droplets are discharged for 300 seconds. Was interrupted (first sequence). Thereafter, similarly, the operation of continuously discharging the droplets and interrupting the discharge of the droplets were repeated. For the designated nozzle near the center of the droplet discharge head, the average weight W ₁ [ng] of the droplets discharged in the first sequence and the average weight W ₃₀₀ [ng] of the droplets discharged in the 300 sequence And asked. Then, the ratio (| W ₁ −W ₃₀₀ | / W _T ) of the absolute value of the difference between W ₁ and W ₃₀₀ to the target discharge amount W _T [ng] of the droplet is obtained, and the following five criteria are used. ,evaluated. | _W 1 _-W 300 | as the value of / _{W T} is small, it can be said to be excellent in intermittent printing performance (stability of the droplet discharge quantity).

_A: | _{W 1 -W} 300 | value of / _{W T} is less than 0.040.
_B: | _{W 1 -W} 300 | values of / _{W T} is less than 0.040 or 0.100.
_C: | _{W 1 -W} 300 | values of / _{W T} is less than 0.100 or 0.400.
_D: | _{W 1 -W} 300 | values of / _{W T} is less than 0.400 or 0.650.
_E: | _{W 1 -W} 300 | value of / _{W T} is 0.650 or more.

[3.4] Continuous Discharge Test Using a liquid droplet discharge apparatus as shown in FIG. 3 installed in a chamber (thermal chamber), the color filter inks of the above examples and comparative examples, 25 ° C., 40% The ink for each color filter was discharged by operating the droplet discharge device continuously for 720 hours under the RH environment.
The nozzle clogging rate ([(number of clogged nozzles) / (total number of nozzles)] × 100) obtained after continuous operation is found and the nozzles are clogged. With respect to the above, it was examined whether or not clogging can be eliminated by a cleaning member made of a plastic material. The results were evaluated according to the following five-step criteria.

A: No nozzle clogging occurs.
B: The occurrence rate of nozzle clogging is less than 0.4% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.4% or more and less than 0.8%, and clogging can be eliminated by cleaning.
D: The occurrence rate of nozzle clogging is 0.8% to less than 1.1%, and clogging can be eliminated by cleaning.
E: The occurrence rate of nozzle clogging is 1.1% or more, or clogging cannot be eliminated by cleaning.
In addition, said evaluation was performed on the same conditions about each Example and each comparative example.

[4] Storage stability evaluation of color filter ink (long-term stability evaluation)
About the ink for color filters of each said Example and each comparative example, the state immediately after preparation (before a heating) and the state after leaving for 120 days in a 55 degreeC environment (heating) by gel permeation chromatograph (GPC) After), Mw and Mn were determined and evaluated according to the following five-step criteria.

A: Change rate of Mw / Mn before and after heating is less than 5%.
B: Change rate of Mw / Mn before and after heating is 5% or more and less than 10%.
C: Mw / Mn change rate before and after heating is 10% or more and less than 15%.
D: Change rate of Mw / Mn before and after heating is 15% or more and less than 20%.
E: Change rate of Mw / Mn before and after heating is 20% or more.

[5] Manufacture of color filters For each of the above Examples and Comparative Examples, 8000 color filters were manufactured using the above-described color filter inks by the following method.
[5.1] Preparation of colored ink Prior to the production of the color filter, a colored ink for forming a colored film was prepared as follows.
First, Dispersic 166 as a dispersing agent, polymer M1, and diethylene glycol monobutyl ether acetate functioning as a solvent for dissolving polymer M1 (a constituent component of a dispersion medium in colored ink) are added to a stirrer (uniaxial mixer). Then, the polymer M solution in which the polymer M1 was dissolved in a solvent was obtained by stirring for 10 minutes with a disper mill (polymer M solution preparation step). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.

Next, as described below, a pigment is added to the polymer M solution obtained in the polymer M solution preparation step, and inorganic beads are added in multiple stages using a stirrer (bead mill) to perform fine dispersion treatment. A fine dispersion step was performed.
First, a pigment was added to the obtained polymer M solution and stirred for 10 minutes. At this time, the rotation speed of the stirring blade of the bead mill (stirrer) was set to 2000 rpm. Examples of the pigment include C.I. I. A mixture of a pigment green 58 powder and a sulfonated pigment derivative (sub-pigment) powder having a chemical structure represented by the following formula (34) was used. At this time, the mixture was diluted with diethylene glycol monobutyl ether acetate so that the pigment content in the mixture of the polymer M solution and the pigment was 16 wt%.

Next, inorganic beads having an average particle size of 0.8 mm (first inorganic beads, manufactured by Zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.) are added and stirred at room temperature for 30 minutes. First-stage distributed processing (first processing) was performed. At this time, the rotation speed of the stirring blade of the bead mill (stirrer) was set to 2000 rpm.
Next, the inorganic beads (first inorganic beads) are removed by filtration using a filter (“PALL HDCII Membrane Filter”, manufactured by PALL), and then inorganic beads having a mean particle diameter of 0.1 mm (second Inorganic beads, made of zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.) were added, and the mixture was further stirred for 30 minutes to perform the second stage dispersion treatment (second treatment). At this time, the rotation speed of the stirring blade of the bead mill (stirrer) was set to 2000 rpm. At this time, the pigment dispersion was diluted with diethylene glycol monobutyl ether acetate so that the pigment content in the obtained pigment dispersion was 13 wt%.
Thereafter, the inorganic beads (second inorganic beads) were removed by filtration using a filter (“PALL HDCII Membrane Filter” (trade name), manufactured by PALL) to obtain a pigment dispersion.

  Next, diethylene glycol monobutyl ether acetate and diethylene glycol mononormal butyl ether as a dispersion medium for dilution were added and mixed (dilution step). This step was performed by putting each of the above materials into a stirrer (uniaxial mixer) having an internal capacity of 400 cc and stirring for 10 minutes with a disper mill. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. As a result, a target green colored ink (G ink) was obtained.

  In addition, C.I. I. Instead of the pigment green 58 powder, C.I. I. A mixture (powder) of CI Pigment Red 177 and a pigment derivative represented by the formula (30); I. Except for using a mixture (powder) of Pigment Red 254 and the pigment derivative represented by Formula (31) and changing the amount of each component used, the red colored ink (R Ink) was prepared.

  In addition, C.I. I. In place of the powder of Pigment Green 58 and the powder of the sulfonated pigment derivative (sub-pigment) having the chemical structure represented by the above formula (34), C.I. I. Pigment blue 15: 6 powder, and C.I. I. A blue colored ink (B ink) was prepared in the same manner as the green colored ink except that the pigment violet 23 powder was used and the amount of each component used was changed.

[5.2] Substrate Preparation Step A soda glass substrate (G5 size: 1100 × 1300 mm) having a silica (SiO ₂ ) film that prevents elution of sodium ions on both surfaces was prepared and subjected to a cleaning treatment.
Next, the radiation-sensitive composition for forming partition walls containing carbon black was applied to the entire surface of one of the cleaned substrates to form a coating film.
Next, prebaking was performed under the conditions of heating temperature: 110 ° C. and heating time: 120 seconds.

[5.3] Partition Wall Formation Step After that, radiation is applied through a photomask to perform post-exposure baking (PEB), and then CF ₄ and He gas are mixed at 1: 9 (volume ratio). Pre-bake treatment and post-exposure bake treatment were performed under conditions of an atmospheric pressure plasma polymerization apparatus in which a mixed gas was introduced, an output of 800 W, a distance from the plasma generator to the table: 0.5 mm, and a treatment table speed: 10 m / s. Only the surface of the coated film was doped with fluorine. Thereafter, development processing using an alkali developer was performed, and further, post-baking processing was performed to form partition walls. PEB was performed under the conditions of heating temperature: 110 ° C., heating time: 120 seconds, and radiation irradiation intensity: 150 mJ / cm ² . The development process was performed by, for example, a vibration dipping method. The development processing time was 60 seconds. Moreover, the post-baking process was performed on the conditions of heating temperature: 140 degreeC and heating time: 10 minutes. The formed partition wall had a thickness of 2.0 μm.

[5.4] Colored ink application step Next, using a droplet discharge device as shown in FIG. 3, the colored ink was discharged into a cell as a region surrounded by a partition wall. At this time, colored inks of three colors were used so that the colored inks of the respective colors were not mixed.
[5.5] Colored film forming step Thereafter, the dispersion medium is removed by performing heat treatment at 230 ° C. for 60 minutes on a hot plate to remove the three colors (red (R), green (G), blue ( The colored film of B)) was formed.

[5.6] Color Filter Ink Applying Step After the substrate provided with the colored film and the partition is left at room temperature for 24 hours, the colored ink is discharged using a droplet discharge device as shown in FIG. The color filter ink was discharged into the cells (in the cells where the colored films were formed). At this time, an amount of color filter ink was applied in each cell so that the average thickness of the formed colored portion (laminated body of the colored portion and the resin film) was 2.0 μm.

[5.7] Resin film forming step After that, heat treatment is performed on a hot plate at 110 ° C. for 60 minutes, and further, heat treatment is performed in an oven at 210 ° C. for 15 minutes, whereby a colored film and a resin film are obtained. A three-color colored portion consisting of
[5.8] Washing Step Thereafter, washing with N-methyl-2-pyrrolidone and γ-butyrolactone was performed, and a color filter as shown in FIG. 1 was obtained.
Further, for each of the examples and the comparative examples, the same method as described above was used except that only one type of ink containing pigment was used, and colored portions of the same color were formed in all cells. By using, a green monochromatic color filter having only a green colored portion as a colored portion, a red single color filter having only a red colored portion as a colored portion, and a blue monochromatic color having only a blue colored portion as a colored portion A filter was manufactured.

[6] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[6.1] Flatness of Colored Part Among the color filters manufactured using the color filter inks of the respective Examples and Comparative Examples, a color filter manufactured for the 7000th sheet was prepared.
About these color filters, the difference (DELTA) D of the maximum height of a coloring part and minimum height was calculated | required using the stylus-type roughness meter (the Tencor company make, P-15), and it evaluated according to the following six steps | standards. .

A: ΔD is less than 0.12 μm.
B: ΔD is 0.12 μm or more and less than 0.24 μm.
C: ΔD is 0.24 μm or more and less than 0.34 μm.
D: ΔD is 0.34 μm or more and less than 0.41 μm.
E: ΔD is 0.41 μm or more and less than 0.49 μm.
F: ΔD is 0.49 μm or more.

[6.2] Evaluation of contrast ratio For each of the above Examples and Comparative Examples, the three types of single color filters (green single color filter, red single color filter, blue single color filter) produced as described above were used. Contrast ratio (CR) was calculated | required using the contrast tester (Kisaka Electric Co., Ltd. make, CT-1), and it evaluated as follows.

For the red single color filter, the CR when x = 0.651 was evaluated according to the following 6-step criteria.
A: CR is 3200 or more.
B: CR is 2800 or more and less than 3200.
C: CR is 2500 or more and less than 2800.
D: CR is 2200 or more and less than 2500.
E: CR is 2000 or more and less than 2200.
F: CR is less than 2000.

For the green single color filter, the CR when y = 0.600 was evaluated according to the following six criteria.
A: CR is 4100 or more.
B: CR is 3900 or more and less than 4100.
C: CR is 3700 or more and less than 3900.
D: CR is 3400 or more and less than 3700.
E: CR is 3100 or more and less than 3400.
F: CR is less than 3100.

For the blue single color filter, the CR when y = 0.141 was evaluated according to the following 6-step criteria.
A: CR is 3400 or more.
B: CR is 3100 or more and less than 3400.
C: CR is 2900 or more and less than 3100.
D: CR is 2700 or more and less than 2900.
E: CR is 2500 or more and less than 2700.
F: CR is less than 2500.

[6.3] Lightness Evaluation Of the color filters manufactured using the color filter inks of the respective Examples and Comparative Examples, the color filters manufactured for the 8000th sheet were used under the same conditions. A liquid crystal display device as shown in FIG. 4 was manufactured. These liquid crystal display devices were evaluated as shown below. For the liquid crystal display device, each color is displayed in a single color, and tristimulus values are obtained by the xyY colorimetric method using a chromaticity meter (manufactured by Minolta, CM-3700d, using C light source as the light source) as follows. Evaluation was performed.
That is, for the single color display of red, the Y value when x = 0.651 was evaluated according to the following six-stage criteria.

A: Brightness Y is 21.6 or more.
B: Lightness Y is 21.2 or more and less than 21.6.
C: Brightness Y is 20.8 or more and less than 21.2.
D: Brightness Y is 20.4 or more and less than 20.8.
E: Lightness Y is 18.9 or more and less than 20.4.
F: Lightness Y is less than 18.9.

For the green single color display, the Y value when y = 0.600 was evaluated according to the following six-stage criteria.
A: Brightness Y is 57.6 or more.
B: Brightness Y is 56.2 or more and less than 57.6.
C: Brightness Y is 54.4 or more and less than 56.2.
D: Brightness Y is 53.3 or more and less than 54.4.
E: Lightness Y is 51.6 or more and less than 53.3.
F: Lightness Y is less than 51.6.

For the blue single color display, the Y value when y = 0.141 was evaluated according to the following six-stage criteria.
A: Brightness Y is 12.1 or more.
B: Lightness Y is 11.7 or more and less than 12.1.
C: Brightness Y is 11.3 or more and less than 11.7.
D: Brightness Y is 10.9 or more and less than 11.3.
E: Brightness Y is 10.4 or more and less than 10.9.
F: Lightness Y is less than 10.4.

[6.4] Color unevenness and density unevenness About the liquid crystal display device of each of the above examples and comparative examples manufactured in [6.3], red single color display, green single color display, blue single color display in a dark room Then, visual observation was performed in a state where white single color display was performed, and the occurrence of color unevenness and density unevenness at each part was evaluated according to the following five-stage criteria.

A: Color unevenness and density unevenness are not recognized at all.
B: Color unevenness and density unevenness are hardly recognized.
C: Color unevenness and density unevenness are slightly recognized.
D: Color unevenness and density unevenness are clearly recognized.
E: Color unevenness and density unevenness are noticeable.

[6.5] Voltage holding ratio of liquid crystal layer The liquid crystal display devices of the respective examples and comparative examples manufactured in the above [6.3] are prepared, and a voltage of 5 V is applied to the liquid crystal layer for 60 microseconds. The voltage holding ratio (VHR) 16.5 milliseconds after the application was canceled after applying at a span of 16.5 milliseconds, the voltage holding ratio measuring system for liquid crystal (product name “MZ1800” manufactured by Micronics) And evaluated according to the following four-stage criteria.
A: VHR is 98% or more.
B: VHR is 96% or more and less than 98%.
C: VHR is 91% or more and less than 96%.
D: VHR is less than 91%.

[6.6] Occurrence of stripe unevenness Among the color filters manufactured using the color filter inks of the respective Examples and Comparative Examples, the color filters manufactured for the 6000th sheet were respectively processed as follows. The occurrence of Tesujimura (streaky irregularities) was evaluated.
[6.6.1] Transmission streaks A color filter is placed on a lit Na lamp and visually observed. The occurrence of streaks (transmission streaks) in the color filter is determined according to the following four criteria. ,evaluated.

A: No streak is observed at all.
B: A slight streak of less than 10 mm was slightly generated.
C: A fine streak of less than 10 mm was generated to such a degree that it could be clearly confirmed.
D: Fine streaks less than 10 mm are noticeable. Or 10mm or more streaks
Had occurred.

[6.6.2] Reflection streaks A color filter is placed on a black plate and visually observed in a state where light from a xenon lamp is irradiated from a direction inclined by 30 ° from the normal direction of the color filter. The color filter was evaluated for the occurrence of stripe irregularities (reflection lines) according to the following four-stage criteria.

A: No streak is observed at all.
B: A slight streak of less than 10 mm was slightly generated.
C: A fine streak of less than 10 mm was generated to such a degree that it could be clearly confirmed.
D: Fine streaks less than 10 mm are noticeable. Or 10mm or more streaks
Had occurred.

[6.7] Characteristic difference between individuals Among the color filters manufactured using the color filter inks of the respective Examples and Comparative Examples, the 1st to 25th sheets and the 7975th to 7999th sheets, respectively. The color filter manufactured in the above is prepared, and in a dark room, a red single color display, a green single color display, a blue single color display, and a white single color display are performed. Colored. From the results, for each example and each comparative example, the color difference (in the Lab display system) that is the largest among the color filters manufactured in the 1st to 25th sheets and the 7975th to 7999th sheets (total of 50 color filters), respectively. The color difference ΔE) was determined and evaluated according to the following five-step criteria.

A: Color difference (ΔE) is less than 1.4.
B: Color difference (ΔE) is 1.4 or more and less than 2.6.
C: Color difference (ΔE) is 2.6 or more and less than 3.5.
D: Color difference (ΔE) is 3.5 or more and less than 4.5.
E: Color difference (ΔE) is 4.5 or more.

[6.8] Heat cycle test Among the color filters manufactured using the color filter inks of the respective Examples and Comparative Examples, the color filters manufactured for the 7021st to 7030th sheets were used. Under the conditions, a liquid crystal display device as shown in FIG. 4 was manufactured.
Using these liquid crystal display devices, light leakage (white spots, bright spots) occurs when visual observation is performed in a dark room with red single color display, green single color display, and blue single color display. Confirmed that there is no.

Next, the color filter was removed from the liquid crystal display device.
Each removed color filter is placed in a 20 ° C. environment for 1.5 hours, then in a 55 ° C. environment for 2.5 hours, then in a 20 ° C. environment for 1.5 hours, and then at −20 ° C. It was left in the environment for 2.5 hours. Thereafter, the environmental temperature was returned again to 20 ° C., which was set as one cycle (8 hours), and this cycle was repeated 60 times in total (total of 480 hours).

Thereafter, using these color filters, a liquid crystal display device as shown in FIG. 4 was assembled again.
Using these liquid crystal display devices, visual observation is performed in a dark room with red single color display, green single color display, and blue single color display, and the occurrence of light leakage (white spots, bright spots) is observed. The evaluation was made according to the following 6-step criteria.

A: There is no color filter in which light leakage (white spots, bright spots) occurs.
B: Light leakage (white spots, bright spots) is observed in one or two color filters.
C: Light leakage (white spots, bright spots) is observed in 3 to 4 color filters.
D: Light leakage (white spots, bright spots) is observed in 5 to 7 color filters.
E: Light leakage (white spots, bright spots) is observed in 8 to 9 color filters.
F: Light leakage (white spots, bright spots) is observed in 10 color filters.

[6.9] Solvent resistance evaluation Among the color filters manufactured using the color filter inks of the respective Examples and Comparative Examples, the color filters manufactured for the 6001st to 6005th sheets, respectively, A liquid crystal display device as shown in FIG. 4 was manufactured under the same conditions. About these liquid crystal display devices, red monochromatic display, green monochromatic display, and blue monochromatic display were performed, and colorimetry was performed using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.).
Next, the color filter was removed from the liquid crystal display device.
Each removed color filter was immersed in a solvent at 50 ° C. for 60 minutes, and then a liquid crystal display device as shown in FIG. 4 was assembled again.

About these liquid crystal display devices, red monochromatic display, green monochromatic display, and blue monochromatic display were performed, and colorimetry was performed using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.).
From these results, the color difference (color difference ΔE in the Lab display system) before and after the immersion of the color filter in the solvent was determined for each example and each comparative example, and evaluated according to the following three-stage criteria.

A: Color difference (ΔE) is less than 3.0.
B: Color difference (ΔE) is 3.0 or more and less than 3.5.
C: Color difference (ΔE) is 3.5 or more.
As the solvent, γ-butyrolactone (γ-BL), isopropyl alcohol (IPA), N-methyl-2-pyrrolidone (NMP), 0.5N hydrochloric acid (HCl), 0.5N aqueous sodium hydroxide solution (NaOH) are used. It was.

  These results are shown in Tables 3-5. In the table, for the evaluation of the color filter, the evaluation result for the red colored portion or red display in the “R” column, the evaluation result for the green colored portion or green display in the “G” column, The evaluation result about a blue coloring part or blue display was shown in the column.

As is apparent from the table, excellent results were obtained with the present invention, whereas satisfactory results were not obtained with the comparative example. In the present invention, ink can be drawn at high speed, and the productivity of the color filter as a whole can be improved.
A color filter was produced in the same manner as described above except that the composition of the colored ink used for forming the colored film was changed, and the same evaluation as described above was performed. As a colored ink, the above-described preferable conditions were satisfied. In particular, when a polymer M containing a preferable content was used, excellent results were obtained.
Further, when a commercially available liquid crystal television was disassembled and the liquid crystal display device part was replaced with one manufactured as described above, and the same evaluation as described above was performed, the same result as above was obtained.

  DESCRIPTION OF SYMBOLS 1 ... Color filter 11 ... Board | substrate 12 ... Colored part 12A ... 1st colored part 12B ... 2nd colored part 12C ... 3rd colored part 13 ... Partition 14 ... Cell 21 ... Colored ink (ink for colored film formation) 22 ... Color filter ink (resin film forming ink) 121 ... Colored film 122 ... Resin film 3 ... Coating film 60 ... Liquid crystal display device 61 ... Common electrode 62 ... Liquid crystal layer 63, 64 ... Alignment film 65 ... Pixel electrode 66 ... Substrate (Counter substrate) 67, 68 ... Polarizing plate 100 ... Droplet discharge device 101 ... Tank 102 ... Discharge scanning unit 103 ... Droplet discharge means 104 ... First position control device (moving means) 106 ... Stage 108 ... Second position control Device (moving means) 110 ... tube 112 ... control means 1000 ... image display device 1100 ... personal computer 1102 ... key Board 1104... Main unit 1106. Display unit 1200. Mobile phone 1202 .. Operation button 1204. ... Video signal output terminal 1314 ... Input / output terminal for data communication 1430 ... TV monitor 1440 ... Personal computer

Claims (12)

A color filter ink used in the production of an ink jet color filter,
It is applied on a colored film formed using a colored ink containing a pigment,
Polymer containing monomer component x1 represented by the following formula (11), monomer component x3 represented by the following formula (13), and monomer component x4 represented by the following formula (14) A color filter ink comprising X, a polymer Y containing a monomer component y1 represented by the following formula (15), and a compound S represented by the following formula (10).

  The color filter ink according to claim 1, wherein R 1 and / or R 2 is an epoxyalkyl group.   The color filter ink according to claim 1, wherein R 1 and / or R 2 are linear. When the content of the compound S in the color filter ink is C _S [wt%] and the content of the polymer Y is C _Y [wt%], 0.05 ≦ C _S / C _Y ≦ 0. The color filter ink according to any one of claims 1 to 3, which satisfies a relationship of 95. When the content of the polymer X in the color filter ink is C _X [wt%] and the content of the polymer Y is C _Y [wt%], 0.05 ≦ C _Y / C _X ≦ 20 The color filter ink according to claim 1, wherein the relationship is satisfied.   The colored ink contains C.I. I. Pigment red 177, C.I. I. The color filter ink according to any one of claims 1 to 5, which contains at least one of CI pigment red 254 and derivatives thereof.   The colored ink contains C.I. I. The color filter ink according to any one of claims 1 to 6, comprising Pigment Green 58.   The colored ink contains C.I. I. The color filter ink according to claim 1, which contains CI Pigment Blue 15: 6. The colored ink includes a monomer component m1 represented by the following formula (1), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component represented by the following formula (3). The color filter ink according to any one of claims 1 to 8, which comprises a polymer M containing m3.

  A color filter manufactured using the color filter ink according to claim 1.   An image display device comprising the color filter according to claim 10.   An electronic apparatus comprising the image display device according to claim 11.

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