JP2016021039A - Organic electroluminescence display device color filter and organic electroluminescence display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color filter which, when used with an organic EL display device, minimizes display defects due to external light reflection, displays images with high brightness, and presents good white color with good color balance using white sub-pixels, and to provide an inexpensive organic EL display device using the same.SOLUTION: The above problem is solved by providing an organic EL display device color filter comprising: a transparent substrate; a coloring portion that includes a plurality of coloring layers of different colors and is formed in a pattern on the transparent substrate; and a white color portion that contains triarylmethane-based colorant and is formed in a pattern on the transparent substrate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a color filter for an organic electroluminescence display device and an organic electroluminescence display device using the same.

  The organic electroluminescence display device has high visibility due to self-coloring, it is an all-solid-state display unlike a liquid crystal display device, so it has excellent impact resistance, has a fast response speed, is less affected by temperature changes, In addition, it has attracted attention because of its advantages such as a large viewing angle, and research and development and commercialization are being promoted as flat panel displays following liquid crystal display devices and plasma displays. Hereinafter, electroluminescence may be abbreviated as EL.

The organic EL display device has an organic EL element based on a laminated structure in which an anode, an organic EL layer including a light emitting layer, and a cathode are laminated in order. Further, the organic EL display device can perform color display by the color of light from the light emitting layer of the organic EL element, but in order to perform color display with better color development, the organic EL element emits white light. And a combination of color filters are also widely used.
In such an organic EL display device, since display is performed by driving an organic EL element, it is required to perform display with high luminance with lower power consumption.

  Therefore, in recent years, an organic EL display device including a pixel portion having four color subpixels in which white subpixels are added to red, green, and blue color subpixels has been proposed (for example, Patent Document 1). . Further, in such an organic EL display device, as a color filter, a transparent substrate, a colored portion having a colored layer of three colors provided in a pattern corresponding to the three colored subpixels, and a white subpixel It has been proposed to use a light source having a white portion having a transparent layer that is provided in a pattern corresponding to the above and transmits white light as it is.

  Incidentally, one of the anode and the cathode of the organic EL element in the organic EL display device is usually composed of a metal electrode. Therefore, in the organic EL display device, when used outdoors, there is a problem that a display defect such as a decrease in contrast occurs due to external light reflected by a metal electrode layer or the like of the organic EL element. .

To solve the above-described problem, for example, a technique for preventing external light reflection by providing a circularly polarizing plate on the observer side of the organic EL display device has been proposed.
However, when a circularly polarizing plate is used, display defects due to reflection of external light can be suppressed, but light emission from the organic EL element is hindered by the circularly polarizing plate, which is 50% higher than the luminance when the circularly polarizing plate is not used. There is a problem that only a luminance of less than or equal to% can be obtained.

  Therefore, the present inventor has intensively studied display defects due to external light reflection, and has found that display defects due to external light reflection are mainly caused by external light reflection in the white subpixel of the organic EL display device. Then, a light absorption layer capable of absorbing external light is formed on the white part of the color filter, and further, the transmission spectrum of the white part is adjusted, so that the intensity of green light having high visibility is increased by the light of other colors. It has been found that display can be performed with high luminance while suppressing display defects due to external light reflection by attenuating from intensity (Patent Documents 2 and 3).

Special table 2007-516564 gazette JP 2014-74880 A JP 2014-48610 A

However, the organic EL element that emits white light has an insufficient balance of light emission intensity in the wavelength region of visible light, and has a problem that, for example, the light emission intensity in the blue wavelength region is weak and white light is yellowish. Therefore, even if the color filters described in Patent Documents 2 and 3 are combined, it is not sufficient to adjust the color of white light.
Specifically, Patent Document 2 discloses providing a light absorption layer containing a blue color material in the white part as a method for adjusting the transmission spectrum of the white part. As the blue color material, phthalocyanine color is disclosed. The material is illustrated. Phthalocyanine-based color material is a color material that transmits light in the blue wavelength region and absorbs light in the green and yellow wavelength regions, but also transmits light in the green and yellow wavelength regions to some extent. It does not lead to the suppression of the yellowness.

  In the case of a light-absorbing layer containing a phthalocyanine-based color material, by increasing the concentration of the phthalocyanine-based color material in the light-absorbing layer, the transmittance in the green and yellow wavelength regions is lowered, and the yellowishness of white light However, in this case, the transmittance in the wavelength region of visible light is reduced as a whole, so that the light extraction efficiency is lowered.

  In addition, in organic EL elements, it is possible to adjust the color of white light by adopting a microcavity structure that utilizes multiple reflection interference, or by devising the layer structure. The cost will be significantly higher.

  The present invention has been made in view of the above-mentioned problems, and when used in an organic EL display device, it is possible to perform display with high luminance while suppressing display defects due to reflection of external light, and further, white A main object is to provide a color filter capable of displaying white with good color balance in a sub-pixel and an inexpensive organic EL display device using the color filter.

  In order to solve the above-mentioned problems, the present invention forms a transparent base material, a colored portion having a plurality of colored layers formed in a pattern on the transparent base material, and a pattern on the transparent base material. And a white part having a light absorption layer containing a triarylmethane color material, and a color filter for an organic EL display device.

  According to the present invention, the white portion has a light absorption layer containing a triarylmethane-based color material, so that when the color filter for an organic EL display device of the present invention is used for an organic EL display device, it reflects outside light. Display with high brightness can be performed while suppressing display defects due to the above, and white with good color balance can be displayed with the white subpixel of the organic EL display device. In addition, by using the color filter for an organic EL display device of the present invention, the manufacturing cost of an organic EL display device having an organic EL element that emits white light can be reduced.

  Moreover, in this invention, it is preferable that the said light absorption layer contains a 2nd color material further. This is because when the light absorption layer contains the second color material in addition to the triarylmethane color material, the transmission characteristics of the white portion can be adjusted so that desired white light can be obtained.

  Furthermore, in this invention, it is preferable that the said colored part has a blue colored layer, and the said blue colored layer contains a triarylmethane type | system | group coloring material. In general, when a triarylmethane color material is used, a blue colored layer having a high transmittance can be obtained, so that the light extraction efficiency can be increased.

  In the present invention, the triarylmethane colorant is preferably a compound represented by the following formula (1). This is because by using a triarylmethane colorant represented by the following formula (1), a light absorption layer having high transmittance, excellent solvent resistance and electrical reliability can be obtained.

(In the above formula (1), A is an a-valent organic group in which the carbon atom directly bonded to N does not have a π bond, and the organic group is saturated aliphatic carbonized at least at the terminal directly bonded to N. It represents an aliphatic hydrocarbon group having a hydrogen group or an aromatic group having the aliphatic hydrocarbon group, and O, S, and N may be contained in the carbon chain, and B ^c- represents a c-valent anion. R ^{1 to} R ⁵ each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ may .Ar ¹ also combine to form a ring structure is represents a divalent aromatic group which may have a substituent. plural R ¹ to R ⁵ and Ar ¹ are each the same A and c are integers of 2 or more, and b and d are integers of 1 or more.)

  In the present invention, the white portion has an average transmittance of 93% or more in the wavelength region of 400 nm to 500 nm, an average transmittance of the wavelength region of 500 nm to 600 nm is 60% or less, and a wavelength of 650 nm to 700 nm. The average transmittance of the region is preferably 70% or less. By attenuating light in the green and yellow wavelength regions, the yellowness of white light from the white light emitting layer can be reduced, and the white color of the organic EL display device using the color filter for organic EL display devices of the present invention. White with good color balance can be displayed in the sub-pixel. In addition, since the average transmittance in the red wavelength region is in the above range, it is possible to suppress reddish reflection light in the white subpixel of the organic EL display device.

  The present invention also provides an organic EL display device comprising the above-described color filter for an organic EL display device and an organic EL element disposed on the color filter for the organic EL display device and including a white light emitting layer. provide.

  According to the present invention, by having the above-described color filter for an organic EL display device, it is possible to perform display with high luminance while suppressing display defects due to reflection of external light, and furthermore, color balance with white subpixels. Good white color can be displayed. In addition, an organic EL display device having a white light-emitting organic EL element can be provided at low cost.

  When used in an organic EL display device, the color filter for an organic EL display device of the present invention can perform display with high luminance while suppressing display defects due to reflection of external light, and further, with a white subpixel. It is possible to display white with good color balance and to provide an inexpensive organic EL display device.

It is a schematic sectional drawing which shows an example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows an example of the organic electroluminescent display apparatus of this invention. It is a schematic diagram which shows the molecular association state of the triarylmethane type | system | group coloring material in this invention. It is a schematic sectional drawing which shows the other example of the color filter for organic EL display apparatuses of this invention. It is a graph which shows the transmission spectrum of the white part of the color filter for organic EL display apparatuses of an Example and a comparative example.

  Hereinafter, the color filter for organic EL display devices and the organic EL display device of the present invention will be described.

A. Color filter for organic EL display device The color filter for organic EL display device of the present invention comprises a transparent substrate, a colored portion having a plurality of colored layers formed in a pattern on the transparent substrate, and the transparent substrate. And a white portion having a light absorption layer formed in a pattern on the material and containing a triarylmethane color material.

  Here, the “colored portion” and the “white portion” refer to the colored subpixels constituting the pixel portion of the organic EL display device when the color filter for an organic EL display device of the present invention is used in an organic EL display device. This is a portion arranged corresponding to each white sub-pixel.

In the following description, “transmitted light” refers to light emitted from a light emitting layer of an organic EL element and transmitted through a colored portion or white portion in an organic EL display device having the color filter for an organic EL display device of the present invention. Specifically, the colored layer in the colored portion and the laminated portion of the transparent base material or the light absorbing layer and the laminated portion of the transparent base material in the white portion are transmitted once from one surface to the other surface. Light from the light emitting layer.
In addition, the “reflected light” refers to external light reflected from the colored portion or the white portion in the organic EL display device having the color filter for the organic EL display device of the present invention. After passing through the laminated part of the material and the colored layer or the laminated part of the transparent substrate and the light absorbing layer in the white part from one side to the other side, it is reflected by the metal electrode layer etc. External light that is transmitted from one surface to the other surface, that is, transmitted through the laminated portion twice.

The color filter for organic EL display devices of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing one example and another example of a color filter for an organic EL display device of the present invention. As illustrated in FIG. 1, the color filter 1 for an organic EL display device includes a transparent substrate 2, a light shielding portion 3 formed in a pattern on the transparent substrate 2, and a pattern on the transparent substrate 2. A colored portion 4 having the formed red colored layer 4R, green colored layer 4G and blue colored layer 4B, and a light absorbing layer 5 formed in a pattern on the transparent substrate 2 and containing a triarylmethane colorant The white portion 6 is included.

  FIG. 2 is a schematic cross-sectional view showing an example of an organic EL display device having the color filter for organic EL display device of the present invention, and is an example using the color filter for organic EL display device shown in FIG. FIG. 2 shows an example of a top emission type organic EL display device. As illustrated in FIG. 2, the organic EL display device 10 includes a color filter 1 for an organic EL display device and an organic EL element substrate 11 in which an organic EL element 16 is formed on a counter substrate 12. Yes. The organic EL element 16 is formed on the metal electrode layer 13 formed on the counter substrate 12, the organic EL layer 14 formed on the metal electrode layer 13 and including the white light emitting layer, and the organic EL layer 14. And a transparent electrode layer 15. Moreover, it is between the color filter 1 for organic EL display apparatuses, and the organic EL element base material 11, Comprising: The outer periphery of the transparent base material 2 of the color filter 1 for organic EL display apparatuses, and the opposing base material 12 of the organic EL element base material 11 In addition, a sealing material 17 is disposed.

  In the organic EL display device 10, external light passes through the transparent substrate 2 and the colored portion 4 or the white portion 6, enters the organic EL display device 10, and is reflected by the metal electrode layer 13 of the organic EL element 16. Then, the light passes through the colored portion 4 or the white portion 6 and the transparent substrate 2 again, and is emitted to the outside of the organic EL display device 10 as reflected light. Further, the light from the white light emitting layer of the organic EL element 16 is transmitted through the colored portion 4 or the white portion 6 and the transparent substrate 2 and is emitted to the outside of the organic EL display device 10 as transmitted light.

  In the white portion 6, since a part of the light is absorbed by the light absorption layer 5 in the process in which external light passes through the laminated portion of the transparent base material 2 and the light absorption layer 5 twice, the reflected light is attenuated and the intensity is increased. Get smaller. Therefore, the intensity of reflected light observed in the white subpixel of the organic EL display device 10 can be attenuated, and the occurrence of display defects due to reflection of external light can be suppressed.

  The triarylmethane colorant is generally used as a blue colorant, and has high transmittance in the blue wavelength region and low transmittance in the green and yellow wavelength regions. Among the visible light wavelength region, light in the green wavelength region is said to have high visibility. Therefore, when the light absorption layer 5 contains a triarylmethane color material, light in the green wavelength region with high visibility can be further attenuated. Therefore, in the white part 6, the intensity | strength of the green light contained in reflected light can be attenuated more, and reflected light can be made harder to observe.

  In general, when a triarylmethane color material is used, a layer having a high transmittance can be obtained. Therefore, in the white portion 6, a part of the light from the white light emitting layer of the organic EL element 16 is absorbed by the light absorption layer 5, but the light absorption layer 5 has a high transmittance, and thus passes through the light absorption layer 5. Accordingly, the attenuation of the intensity of transmitted light can be reduced. Specifically, the attenuation of the intensity of the transmitted light in the white portion 6 can be reduced as compared with the conventional case where the circularly polarizing plate is disposed on the observer side of the organic EL display device. Furthermore, since a circularly polarizing plate is not required as in the prior art, the circularly polarizing plate does not reduce the brightness of transmitted light at the colored portion 4. Therefore, the brightness of the entire organic EL display device 10 can be increased, and the light extraction efficiency can be improved.

  Further, as described above, the triarylmethane colorant generally has a high transmittance in the blue wavelength region and a low transmittance in the green and yellow wavelength regions. Therefore, when the white light from the white light emitting layer of the organic EL element 16 is yellowish, the light absorption layer 5 can reduce the yellowishness. Therefore, the white subpixel of the organic EL display device 10 can display white with good color balance.

  As described above, in the present invention, when the white part has a light absorption layer containing a triarylmethane-based color material, when the color filter for an organic EL display device of the present invention is used for an organic EL display device, While suppressing display defects due to light reflection, it is possible to perform display with high luminance, and it is possible to display white with good color balance in the white subpixel of the organic EL display device. Therefore, by using the color filter for an organic EL display device of the present invention, an organic EL display device having a white light emitting organic EL element can be provided at low cost.

Moreover, in this invention, the white part has the light absorption layer containing a triarylmethane type | system | group coloring material, and can also suppress the reflective nonuniformity in an organic electroluminescence display.
Here, reflection unevenness is caused by external light incident on one subpixel from an oblique direction with respect to the display surface in the organic EL display device, reflected by the metal electrode layer of the organic EL element, and from other subpixels of different colors. By being emitted as reflected light, it occurs because light of two colors is mixed and observed in a part of other sub-pixels. Such reflection unevenness is particularly easily observed when external light incident from the colored subpixel is emitted as reflected light from the white subpixel. In addition, since the light in the green wavelength region has high visibility, the reflection unevenness caused by the external light incident from the green subpixel being emitted as reflected light from the white subpixel is more easily observed.
In the present invention, since the white portion has the light absorption layer, the reflected light that causes the reflection unevenness can also be attenuated, so that the reflection unevenness in the white portion can be suppressed. Furthermore, since the triarylmethane colorant has a low transmittance in the green wavelength region as described above, green light with particularly high visibility can be attenuated in the white portion, and external light incident from the green subpixel can be attenuated. The reflection unevenness due to being emitted as reflected light from the white subpixel can be sufficiently suppressed.

  Hereinafter, each structure in the color filter for organic EL display devices of this invention is demonstrated.

1. Light Absorbing Layer The light absorbing layer in the present invention constitutes a white portion and contains a triarylmethane color material.

The triarylmethane colorant used in the present invention is not particularly limited as long as it is generally used for color filters. For example, triarylmethane dyes and triarylmethane dyes are laked. There may be mentioned lake pigments.
Examples of triarylmethane dyes include Basic Blue 7 and Basic Blue 26.
Examples of lake pigments obtained by lake-forming triarylmethane dyes include C.I. I. Pigment blue 1, C.I. I. Pigment blue 1: 2, C.I. I. Pigment blue 9, C.I. I. Pigment blue 14, C.I. I. Pigment blue 24, C.I. I. Pigment blue 56, C.I. I. Pigment blue 56: 1, C.I. I. Pigment blue 61, C.I. I. Pigment blue 61: 1, C.I. I. Pigment blue 62, C.I. I. And CI Pigment Blue 78.

  Especially, it is preferable that a triarylmethane type | system | group coloring material is a compound which has a cation part and anion part which have a triarylmethane frame | skeleton. In general, dyes are easily dissolved in a solvent, but by using a salt-forming compound having a cation part and an anion part having a triarylmethane skeleton, the solubility in the solvent is lowered and the light absorption layer having good solvent resistance. It is because it can obtain.

  Especially, it is preferable that a triarylmethane type | system | group coloring material is a compound represented by following General formula (1).

(In the formula (1), A is an a-valent organic group in which the carbon atom directly bonded to N does not have a π bond, and the organic group is a saturated aliphatic hydrocarbon at least at the terminal directly bonded to N. Represents an aliphatic hydrocarbon group having a group or an aromatic group having the aliphatic hydrocarbon group, and the carbon chain may contain O, S, and N. B ^c- represents a c-valent anion. R ^{1 to} R ⁵ each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ combine to form a ring structure may .Ar ¹ also represents a divalent aromatic group which may have a substituent. plural R ¹ to R ⁵ and Ar ¹ a respectively identical A and c are integers of 2 or more, and b and d are integers of 1 or more.)

  By using the triarylmethane colorant represented by the above formula (1), it is possible to obtain a light absorption layer having high transmittance and excellent solvent resistance and electrical reliability.

The reason for this is not clear, but is estimated as follows.
That is, the triarylmethane-based colorant represented by the above formula (1) has a cationic coloring portion of 2 through a linkage 203 with A as well as a counter anion 202 having a valence of 2 or more, as illustrated in FIG. It has two or more valent counter cations 201 bonded together. For example, when both an anion and a cation are divalent ions, the anion and the cation are not simply bonded one molecule to one molecule in the aggregate of the coloring material, but as shown in FIG. It is presumed that a molecular aggregate 210 is formed in which molecules are associated through a continuous ionic bond 204. Since the molecular aggregate 210 behaves like one molecule in the color material aggregate, the apparent molecular weight increases remarkably. In addition, the formation of the molecular aggregate 210 increases the cohesion force in the solid state, lowers the movement due to heat, and further stabilizes electrically, so it is estimated that the dissociation of ion pairs and the decomposition of the cation moiety can be suppressed. Is done. As a result, the solvent resistance of the triarylmethane colorant represented by the above formula (1) is improved, and the solvent resistance and electrical reliability of the light absorption layer using this triarylmethane colorant are improved. Estimated. In addition, fine particles made of molecular aggregates in which a plurality of molecules associate with each other through ionic bonds have a reduced mobility of ion pairs, so that a reduction in contrast due to reaggregation between the fine particles can be suppressed.
In the triarylmethane colorant represented by the above formula (1), since the hydrocarbon of the linking group A directly bonded to the cationic coloring site does not have a π bond, the cationic coloring site is The color characteristics such as color tone and transmissivity hardly change before and after the introduction of the linking group A.

  The cation portion of the triarylmethane colorant is a divalent or higher cation having a structure represented by the following general formula (2).

(In the formula (2), A, R ^{1 to} R ⁵ , Ar ¹ and a are the same as in the formula (1).)

Even if the cation part represented by said Formula (2) is the chloride, it does not melt | dissolve substantially in water.
The structure represented by the above formula (2) is a divalent or higher cation in which a cation consisting of only one triarylmethane skeleton is linked through an a-valent covalent bond.
In the case where it is considered that the monocation and the anion constituting the monocation consisting of only one triarylmethane skeleton are only ionic bonds, the binding species constituting the salt formation consisting of a divalent or higher cation is added to the ionic bond, It can be considered that the structure includes a covalent bond linking monocations. For this reason, the salt-forming product composed of a divalent or higher cation having the structure represented by the above formula (2) has increased the number of strong binding species in the entire component than the salt-forming product composed of one triarylmethane skeleton. It is estimated that the stability becomes high and it becomes difficult to hydrate. Furthermore, the structure represented by the above formula (2) has a large molecular weight due to the influence of the linking group A and becomes more hydrophobic, so that it substantially dissolves in water in combination with the stability of the bond. It is estimated that it will not.

A in the formula (1) is an a-valent organic group in which the carbon atom directly bonded to N (nitrogen atom) does not have a π bond, and the organic group is saturated fat at least at the terminal directly bonded to N. Represents an aliphatic hydrocarbon group having an aromatic hydrocarbon group, or an aromatic group having the aliphatic hydrocarbon group, and includes O (oxygen atom), S (sulfur atom), and N (nitrogen atom) in the carbon chain It may be. Since the carbon atom directly bonded to N does not have a π bond, the color characteristics such as the color tone and transmittance of the cationic coloring portion are not affected by the linking group A and other coloring portions, Similar colors can be retained.
In A, an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at the terminal directly bonded to N is linear, branched or cyclic unless the terminal carbon atom directly bonded to N has a π bond. The carbon atom other than the terminal may have an unsaturated bond, may have a substituent, and the carbon chain contains O, S, and N. Also good. For example, a carbonyl group, a carboxy group, an oxycarbonyl group, an amide group or the like may be contained, and a hydrogen atom may be further substituted with a halogen atom or the like.
The aromatic group having an aliphatic hydrocarbon group in A is a monocyclic or polycyclic aromatic group having an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at the terminal directly bonded to N. And may have a substituent, and may be a heterocyclic ring containing O, S, and N.
Especially, it is preferable that A contains a cyclic | annular aliphatic hydrocarbon group or an aromatic group from the point of the robustness of frame | skeleton.
Among the cyclic aliphatic hydrocarbon groups, a bridged alicyclic hydrocarbon group is preferable from the viewpoint of skeleton fastness. The bridged alicyclic hydrocarbon group means a polycyclic aliphatic hydrocarbon group having a bridged structure in the aliphatic ring and having a polycyclic structure, for example, norbornane, bicyclo [2,2,2]. Examples include octane and adamantane. Among the bridged alicyclic hydrocarbon groups, norbornane is preferable. Moreover, as an aromatic group, the group containing a benzene ring and a naphthalene ring is mentioned, for example, Among these, the group containing a benzene ring is preferable.
From the viewpoint of easy availability of raw materials, A is preferably divalent. For example, when A is a divalent organic group, a linear, branched or cyclic alkylene group having 1 to 20 carbon atoms, or an aromatic group substituted with 2 alkylene groups having 1 to 20 carbon atoms such as a xylylene group Etc.

The alkyl group in R ^{1 to} R ⁵ is not particularly limited. For example, a linear or branched alkyl group having 1 to 20 carbon atoms can be mentioned, among which a linear or branched alkyl group having 1 to 8 carbon atoms is preferable, and a straight chain having 1 to 5 carbon atoms. A chain or branched alkyl group is more preferred from the viewpoint of ease of production and raw material procurement. Especially, it is especially preferable that the alkyl group in R < ¹ > -R < ⁵ > is an ethyl group or a methyl group. The substituent that the alkyl group may have is not particularly limited, and examples thereof include an aryl group, a halogen atom, and a hydroxyl group, and examples of the substituted alkyl group include a benzyl group.
The aryl group in R ^{1 to} R ⁵ is not particularly limited. For example, a phenyl group, a naphthyl group, etc. are mentioned. Examples of the substituent that the aryl group may have include an alkyl group and a halogen atom.

R ² and R ³ , R ⁴ and R ⁵ are combined to form a ring structure. R ² and R ³ , R ⁴ and R ⁵ form a ring structure through a nitrogen atom. Say. The ring structure is not particularly limited, and examples thereof include a pyrrolidine ring, a piperidine ring, and a morpholine ring.

Among them, from the viewpoint of chemical stability, R ^{1 to} R ⁵ are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, or R ² and R ³ , or R ⁴ and R ^5. Thus, it is preferable to form a pyrrolidine ring, a piperidine ring, or a morpholine ring.

R ^{1 to} R ⁵ can each independently have the above structure. Among them, R ¹ is preferably a hydrogen atom from the viewpoint of color purity, and R ² to R ² are preferably from the viewpoint of ease of production and raw material procurement. More preferably, all R ⁵ are the same.

The divalent aromatic group in Ar ¹ is not particularly limited. The aromatic group may be a heterocyclic group in addition to an aromatic hydrocarbon group composed of a carbocyclic ring. As an aromatic hydrocarbon in the aromatic hydrocarbon group, in addition to a benzene ring, condensed polycyclic aromatic hydrocarbons such as naphthalene ring, tetralin ring, indene ring, fluorene ring, anthracene ring, phenanthrene ring; biphenyl, terphenyl, Examples thereof include chain polycyclic hydrocarbons such as diphenylmethane, triphenylmethane, and stilbene. The chain polycyclic hydrocarbon may have O, S, and N in the chain skeleton such as diphenyl ether. On the other hand, the heterocyclic ring in the heterocyclic group includes 5-membered heterocycles such as furan, thiophene, pyrrole, oxazole, thiazole, imidazole, and pyrazole; And condensed polycyclic heterocycles such as benzofuran, thionaphthene, indole, carbazole, coumarin, benzo-pyrone, quinoline, isoquinoline, acridine, phthalazine, quinazoline, quinoxaline and the like. These aromatic groups may have a substituent.

  Examples of the substituent that the aromatic group may have include an alkyl group having 1 to 5 carbon atoms and a halogen atom.

Ar ¹ is preferably an aromatic group having 6 to 20 carbon atoms, and more preferably an aromatic group comprising a condensed polycyclic carbocyclic ring having 10 to 14 carbon atoms. Among these, a phenylene group or a naphthylene group is more preferable because the structure is simple and the raw material is inexpensive.

A plurality of R ^{1 to} R ⁵ and Ar ¹ in one molecule may be the same or different. In the case where a plurality of R ^{1 to} R ⁵ and Ar ¹ are the same, the color development site exhibits the same color development, so that the same color as the single color development site can be reproduced, which is preferable from the viewpoint of color purity. On the other hand, when at least one of R ^{1 to} R ⁵ and Ar ¹ is a different substituent, a color obtained by mixing plural types of monomers can be reproduced and adjusted to a desired color. it can.

The anion portion of the triarylmethane colorant is a divalent or higher anion having a structure represented by (B ^c− ). B ^c- is not particularly limited as long as it is a divalent or higher anion, and may be an organic anion or an inorganic anion. Here, the organic anion represents an anion containing at least one carbon atom. Moreover, an inorganic anion represents the anion which does not contain a carbon atom.

When B ^c- is an organic anion, the structure is not particularly limited. Among these, an organic group having an anionic substituent is preferable.
Examples of the anionic substituent include —SO ₂ N ^— SO ₂ CH ₃ , —SO ₂ N ^— COCH ₃ , —SO ₂ N ^— SO ₂ CF ₃ , —SO ₂ N ^— COCF ₃ , —CF ₂ SO _{2. ^{N - SO 2 CH 3, -CF}} 2 SO 2 N - COCH 3, -CF 2 SO 2 N - SO 2 CF 3, -CF 2 SO 2 N - COCF 3 or imidate group such as, -SO ₃ ^-, Substituents such as —CF ₂ SO ₃ ^— , —PO ₃ ²⁻ , —COO ⁻ , —CF ₂ PO ₃ ²⁻ , —CF ₂ COO ^{— and the} like can be mentioned.
Among these, it is preferable to use two or more monovalent anionic substituents from the viewpoint of stabilizing the cation and stabilizing the color development of the triarylmethane colorant. The ease and the manufacturing cost of raw materials available, from the viewpoint high effect of maintaining the color-developed state is stabilized cations by high acidity, and imidate _{^{groups, -SO 3 -, -CF 2 SO}} 3 - are preferred, further More preferably, it is —SO ₃ ^— (sulfonato group).
When a plurality of anionic substituents are substituted, the same substituent may be used, or different substituents may be used.

It does not specifically limit as an organic group by which an anionic substituent is substituted. Examples of the organic group include a linear, branched, or cyclic saturated or unsaturated hydrocarbon group, a monocyclic or polycyclic aromatic group, and a group in which these are combined, and these include O, S in the carbon chain. , N and the like, a carbonyl group, a carboxy group, an oxycarbonyl group, an amide group may be contained, and a hydrogen atom may be substituted. Examples of the substituent that the organic group may have include a halogen atom.
Examples of the organic group in which the anionic substituent is substituted include cyclopropane, cyclobutane, cyclopentane, cyclohexane, norbornane, [2,2,2] bicyclohexane, [3,2,3] bicyclooctane, adamantane, and the like. Hydrocarbons such as benzene, naphthalene, anthracene, phenanthrene, pyrene, triphenylene, fluorene, furan, thiophene, pyrrole, imidazole, pyran, pyridine, pyrimidine, pyrazine, triazine, indole, purine, quinoline, isoquinoline, xanthene, carbazole, etc. Group compounds, and further may have a substituent such as a halogen atom or an alkyl group.
Among them, the organic group to be substituted with the anionic substituent is preferably a monocyclic or polycyclic aromatic hydrocarbon group or a group in which these are combined from the viewpoint of easy introduction of the anionic substituent.
For the purpose of preventing color change by anions, it is preferable to use an organic group having an absorption maximum in a wavelength region of 400 nm or less. Examples of the organic group having an absorption maximum in a wavelength region of 400 nm or less include organic groups composed of condensed polycyclic carbocycles such as naphthalene, tetralin, indene, fluorene, anthracene, phenanthrene; biphenyl, terphenyl, diphenylmethane, and triphenyl. Organic groups consisting of chain polycyclic hydrocarbons such as methane and stilbene; Organic groups consisting of 5-membered heterocycles such as furan, thiophene, pyrrole, oxazole, thiazole, imidazole, pyrazole, pyran, pyrone, pyridine, pyridazine, Aromatic compounds composed of 6-membered heterocycles such as pyrimidine and pyrazine; condensed polycyclic heterocycles such as benzofuran, thionaphthene, indole, carbazole, coumarin, benzo-pyrone, quinoline, isoquinoline, acridine, phthalazine, quinazoline, quinoxaline Organic group, and the like made.

Moreover, as an organic group substituted with an anionic substituent, a skeleton derived from an azo dye, anthraquinone dye, triphenylmethane dye, xanthene dye, phthalocyanine dye, indigo dye, or the like, which is an organic compound or an organometallic compound, is used. May be. Alternatively, conventionally known acid dyes, direct dyes, acid mordant dyes, and the like may be used.
When a dye-derived skeleton, acid dye, direct dye, acid mordant dye, or the like is used, the color tone of the resulting triarylmethane colorant changes, and the triarylmethane color represented by the above formula (1) The color tone of the material can be adjusted to a desired one.

  Examples of the acid dye include C.I. I. Acid Yellow 1, 3, 7, 9, 11, 17, 23, 25, 29, 34, 36, 38, 40, 42, 54, 65, 72, 73, 76, 79, 98, 99, 111, 112, 113, 114, 116, 119, 123, 128, 134, 135, 138, 139, 140, 144, 150, 155, 157, 160, 161, 163, 168, 169, 172, 177, 178, 179, 184, 190, 193, 196, 197, 199, 202, 203, 204, 205, 207, 212, 214, 220, 221, 228, 230, 232, 235, 238, 240, 242, 243, 251, C.I. I. Acid Red 1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 34, 35, 37, 42, 44, 50, 51, 52, 57, 66, 73, 80, 87, 88, 91, 92, 94, 97, 103, 111, 114, 129, 133, 134, 138, 143, 145, 150, 151, 158, 176, 182, 183, 198, 206, 211, 215, 216, 217, 227, 228, 249, 252, 257, 258, 260, 261, 266, 268, 270, 274, 277, 280, 281, 195, 308, 312, 315, 316, 339, 341, 345, 346, 349, 382, 383, 394, 401, 412, 417, 418, 422, 426, C.I. I. Acid Orange 6, 7, 8, 10, 12, 26, 50, 51, 52, 56, 62, 63, 64, 74, 75, 94, 95, 107, 108, 169, 173, C.I. I. Acid Blue 1, 7, 9, 15, 18, 23, 25, 27, 29, 40, 42, 45, 51, 62, 70, 74, 80, 83, 86, 87, 90, 92, 96, 103, 112, 113, 120, 129, 138, 147, 150, 158, 171, 182, 192, 210, 242, 243, 256, 259, 267, 278, 280, 285, 290, 296, 315, 324: 1, 335, 340, C.I. I. Acid Violet 6B, 7, 9, 17, 19, C.I. I. Acid Green 1, 3, 5, 9, 16, 25, 27, 50, 58, 63, 65, 80, 104, 105, 106, 109 and the like.

  Examples of the direct dye include C.I. I. Direct Yellow 2, 33, 34, 35, 38, 39, 43, 47, 50, 54, 58, 68, 69, 70, 71, 86, 93, 94, 95, 98, 102, 108, 109, 129, 136, 138, 141, C.I. I. Direct Red 79, 82, 83, 84, 91, 92, 96, 97, 98, 99, 105, 106, 107, 172, 173, 176, 177, 179, 181, 182, 184, 204, 207, 211, 213, 218, 220, 221, 222, 232, 233, 234, 241, 243, 246, 250, C.I. I. Direct orange 34, 39, 41, 46, 50, 52, 56, 57, 61, 64, 65, 68, 70, 96, 97, 106, 107, C.I. I. Direct Blue 57, 77, 80, 81, 84, 85, 86, 90, 93, 94, 95, 97, 98, 99, 100, 101, 106, 107, 108, 109, 113, 114, 115, 117, 119, 137, 149, 150, 153, 155, 156, 158, 159, 160, 161, 162, 163, 164, 166, 167, 170, 171, 172, 173, 188, 189, 190, 192, 193, 194, 196, 198, 199, 200, 207, 209, 210, 212, 213, 214, 222, 228, 229, 237, 238, 242, 243, 244, 245, 247, 248, 250, 251, 252, 256, 257, 259, 260, 268, 274, 275, 293, C.I. I. Direct violet 47, 52, 54, 59, 60, 65, 66, 79, 80, 81, 82, 84, 89, 90, 93, 95, 96, 103, 104, C.I. I. Direct green 25, 27, 31, 32, 34, 37, 63, 65, 66, 67, 68, 69, 72, 77, 79, 82 etc. are mentioned.

  Examples of the acid mordant dye include C.I. I. Modern Yellow 5, 8, 10, 16, 20, 26, 30, 31, 33, 42, 43, 45, 56, 61, 62, 65, C.I. I. Modern Red 1, 2, 3, 4, 9, 11, 12, 14, 17, 18, 19, 22, 23, 24, 25, 26, 30, 32, 33, 36, 37, 38, 39, 41 43, 45, 46, 48, 53, 56, 63, 71, 74, 85, 86, 88, 90, 94, 95, C.I. I. Modern Orange 3, 4, 5, 8, 12, 13, 14, 20, 21, 23, 24, 28, 29, 32, 34, 35, 36, 37, 42, 43, 47, 48, C.I. I. Modern Blue 1, 2, 3, 7, 8, 9, 12, 13, 15, 16, 19, 20, 21, 22, 23, 24, 26, 30, 31, 32, 39, 40, 41, 43 44, 48, 49, 53, 61, 74, 77, 83, 84, C.I. I. Modern violet 1, 2, 4, 5, 7, 14, 22, 24, 30, 31, 32, 37, 40, 41, 44, 45, 47, 48, 53, 58, C.I. I. Modern green 1, 3, 4, 5, 10, 15, 19, 26, 29, 33, 34, 35, 41, 43, 53 etc. are mentioned.

  Among the above dyes, when the dye itself is a divalent or higher anion, the dye can be used as it is as an anion portion in a triarylmethane colorant. When the dye itself is not a divalent or higher anion, an anionic substituent is introduced so that it becomes a divalent or higher anion as appropriate.

  Among them, the organic anion is at least one selected from the group consisting of anions represented by the following general formula (3), the following general formula (4), and the following general formula (5). And it is preferable from the point which improves electrical reliability.

(In Formula (3), Ar ² is a c-valent aromatic group which may have a substituent. C represents an integer of 2 or more.)

(In Formula (4), R ⁶ is a hydrogen atom or a methyl group, Ar ³ is an aromatic group which may have a substituent, and Q represents a direct bond or a divalent linking group. f represents an integer of 1 or more, and g represents an integer of 2 or more.)

(In the formula (5), M represents two hydrogen atoms, or Cu, Mg, Al, Ni, Co, Fe, or Zn. A sulfonate group (—SO ₃ ^— group) is substituted with an aromatic ring. C represents an integer of 2 to 4.)

When the anion of the above formula (3) is used as the anion part of the triarylmethane colorant, the anion is colorless or light yellow, and thus the resulting triarylmethane colorant is represented by the above formula (1). It has the characteristic of easily retaining the inherent color of the cation represented.
When an anion of the above formula (4) is used as the anion portion of the triarylmethane-based color material, the anion valence increases, so that it can interact with more cations represented by the above formula (1). . As a result, it has a feature that it is more cohesive and insolubility to the solvent is increased.
When the anion of the above formula (5) is used as the anion portion of the triarylmethane color material, the triarylmethane color material can be adjusted to a desired color by combination with the cation portion.

The aromatic group in Ar ² and Ar ³ is not particularly limited. The aromatic group may be a heterocyclic ring in addition to an aromatic hydrocarbon group composed of a carbocyclic ring. As aromatic hydrocarbon group, in addition to benzene ring, condensed polycyclic aromatic hydrocarbon groups such as naphthalene ring, tetralin ring, indene ring, fluorene ring, anthracene ring, phenanthrene ring; biphenyl, terphenyl, diphenylmethane, triphenyl Examples thereof include chain polycyclic hydrocarbon groups such as methane and stilbene. The chain polycyclic hydrocarbon group may have a heteroatom such as O or S in the chain skeleton such as diphenyl ether. On the other hand, the heterocyclic ring includes 5-membered heterocycles such as furan, thiophene, pyrrole, oxazole, thiazole, imidazole and pyrazole; 6-membered heterocycles such as pyran, pyrone, pyridine, pyridazine, pyrimidine and pyrazine; benzofuran, thionaphthene and indole And condensed polycyclic heterocycles such as carbazole, coumarin, benzo-pyrone, quinoline, isoquinoline, acridine, phthalazine, quinazoline, and quinoxaline. These aromatic groups may have a substituent.

  As a substituent which an aromatic group has, a C1-C5 alkyl group, a halogen atom, etc. are mentioned.

Ar ² and Ar ³ are preferably aromatic groups having 6 to 20 carbon atoms, and more preferably aromatic groups consisting of condensed polycyclic carbocycles having 10 to 14 carbon atoms. Among these, a phenylene group or a naphthalene group is more preferable because the structure is simple and the raw material is inexpensive.

  In the above formula (4), Q represents a direct bond or a divalent linking group. Examples of the divalent linking group include an alkylene group having 1 to 10 carbon atoms, an arylene group, a -CONH- group, a -COO- group, and an ether group having 1 to 10 carbon atoms (-R'-OR "-: R 'And R ″ are each independently an alkylene group) and combinations thereof. Among these, Q is preferably a direct bond or a —COO— group.

In the above formula (4), f is not particularly limited as long as f is an integer of 1 or more. From the viewpoint of easy availability of raw materials, f is more preferably 1.
G is an integer of 2 or more. Among these, from the viewpoint of heat resistance, g is preferably 50 or more, and more preferably 80 or more. On the other hand, from the viewpoint of solubility, g is preferably 3000 or less, and more preferably 2000 or less. The weight average molecular weight of the anion represented by the above formula (4) is preferably 10,000 to 100,000. Here, the weight average molecular weight is determined in terms of standard polystyrene measured by GPC (gel permeation chromatography).

  In the above formula (4), the plurality of structural units may all be the same, or two or more types may be included. In the above equation (4), the sum of a plurality of fs corresponds to c in the above equation (1).

On the other hand, when B ^c- is an inorganic anion, its structure and composition are not particularly limited as long as it is an inorganic oxo acid and its dehydration condensate. Examples of inorganic anions include divalent or higher oxo acid anions (phosphate ions, sulfate ions, chromate ions, tungstate ions (WO ₄ ²⁻ ), molybdate ions (MoO ₄ ²⁻ ), etc.), Examples thereof include inorganic anions such as polyacid ions in which a plurality of oxo acids are condensed, and mixtures thereof.
The polyacid may be an isopolyacid ion (M _m O _n ) ^c- or a heteropoly acid ion (X _l M _m O _n ) ^c- . In the above ionic formula, M represents a poly atom, X represents a hetero atom, m represents a composition ratio of poly atoms, and n represents a composition ratio of oxygen atoms. Examples of the poly atom M include Mo, W, V, Ti, and Nb. Examples of the hetero atom X include Si, P, As, S, Fe, and Co.
Especially, it is preferable that it is an anion of the inorganic acid containing molybdenum (Mo) and tungsten (W) from a heat resistant point.

Examples of anions of inorganic acids including molybdenum and tungsten include, for example, isopolyacids such as tungstate ion [W ₁₀ O ₃₂ ] ⁴⁻ , molybdate ion [Mo ₆ O ₁₉ ] ^2−, and phosphorous that is a heteropolyacid. tungstate ion _{[PW 12 O} ^{40] 3-,} silicotungstic acid ion _{[SiW 12 O} ^{40] 4-,} phosphomolybdic acid ion _{[PMo 12 O} ^{40] 3-,} phosphorus tongue strike molybdate _{[PW 12-x} Mo x O ₄₀ ] ³⁻ , H ₃ [PW _2−x Mo _x O ₇ ] ^{4− and the} like. The anion of the inorganic acid containing molybdenum or tungsten is preferably a heteropolyacid among the above from the viewpoint of heat resistance and the availability of raw materials, and further a heteropolyacid containing P (phosphorus). Is more preferable.

  In the above formula (1), a is the number of chromogenic cation sites constituting the cation. a is an integer of 2 or more. That is, since the triarylmethane colorant has a cation valence of 2 or more and an anion valence of 2 or more, the above-described molecular association is formed, and the solvent resistance and electrical reliability are improved. To do. On the other hand, the upper limit of a is not particularly limited, but a is preferably 4 or less, and more preferably 3 or less from the viewpoint of ease of production.

In the above formula (1), b represents the number of cations in the molecular aggregate, d represents the number of anions in the molecular aggregate, and b and d represent an integer of 1 or more. The triarylmethane colorant is not limited to the case where b and d are each 1 in the crystal or aggregate thereof, and can take any natural number of 2, 3, 4,. It is preferable that at least a part of the triarylmethane-based colorant forms a molecular aggregate of b ≧ 2 from the viewpoint of solvent resistance and electrical reliability. Moreover, it is preferable that at least a part of the triarylmethane-based color material forms a molecular aggregate having d ≧ 2 from the viewpoint of solvent resistance and electrical reliability.
When b is 2 or more, a plurality of cations in the molecular aggregate may be one kind alone, or two or more kinds may be combined. When d is 2 or more, the anion present in the molecular aggregate may be a single anion or a combination of two or more, and an organic anion and an inorganic anion may be used in combination. .
In addition, when the triarylmethane colorant is a normal salt, there is no problem that the dispersion does not proceed properly as in the case of using an acid salt, or the dispersion does not gel when stored. Is preferable from the viewpoint of high stability and dispersion stability.

  The triarylmethane colorant represented by the above formula (1) can be obtained by the synthesis method described in Japanese Patent No. 5223980.

  The triarylmethane colorant may be used alone or in combination of two or more, and is appropriately determined according to the transmission characteristics of the target white part.

The content of the triarylmethane color material in the light absorption layer is appropriately selected according to the transmission characteristics of the target white portion, the thickness of the light absorption layer, and the like. For example, when the light absorption layer has a thickness described later, the content of the triarylmethane colorant in the light absorption layer is set within a range of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the resin. In particular, it is preferably in the range of 0.5 to 7 parts by mass, particularly in the range of 1 to 5 parts by mass. When the content of the triarylmethane color material is small or large, it may be difficult to adjust the transmission characteristics of the white portion using the light absorption layer.
Note that the content of the triarylmethane-based color material means the total content of the triarylmethane-based color material when a plurality of triarylmethane-based color materials are added.

The light absorbing layer preferably further contains a second color material in addition to the triarylmethane color material. This is because when the light absorption layer contains the second color material in addition to the triarylmethane color material, the transmission characteristics of the white portion can be adjusted so that desired white light can be obtained. Specifically, some triarylmethane colorants have a relatively high transmittance in the red wavelength region, but by using a combination of a triarylmethane colorant and a second colorant, white The transmission characteristics of the part can be adjusted, and the redness of the reflected light at the white subpixel of the organic EL display device can be reduced. Thereby, when the organic EL element is turned off, it is possible to prevent the screen from becoming reddish and damaging the appearance.
The “second color material” refers to a color material other than the triarylmethane color material.

Examples of the second color material include a blue color material, a purple color material, and a black color material.
Examples of the blue color material include phthalocyanine color materials. Specifically, C.I. I. Pigment Blue (hereinafter sometimes referred to as PB) 15: 1, PB15: 2, PB15: 3, PB15: 4, PB15: 6, PB16, and the like.
Examples of purple color materials include xanthene color materials, dioxazine color materials, rhodamine color materials, and the like. Specifically, C.I. I. Pigment Violet (hereinafter sometimes referred to as PV) 19, PV23, PV29, PV32 and the like.
Examples of the black color material include carbon black and titanium black.
Among these, PB15: 1, PB15: 3, PB15: 4, PB15: 6, PB16, PV19, PV23 and the like are preferably used.
A 2nd color material may be used individually by 1 type, may be used in mixture of 2 or more types, and is suitably determined according to the transmission characteristic etc. of the target white part.

The content of the second color material in the light absorption layer is appropriately selected according to the transmission characteristics of the target white portion, the thickness of the light absorption layer, and the like. For example, when the light absorption layer has a thickness described later, the content of the second color material in the light absorption layer is set within a range of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the resin. Can do.
The content of the second color material means the total content when a plurality of second color materials are added.

  Usually, a light absorption layer contains resin. The resin is not particularly limited as long as it can form a light-absorbing layer capable of dispersing a coloring material and imparting desired transmission characteristics to the white portion, but has a light-transmitting photosensitivity. Resin can be used suitably.

The light-transmitting photosensitive resin is not particularly limited, and any of a negative photosensitive resin and a positive photosensitive resin can be used.
The negative photosensitive resin is not particularly limited, and a general negative photosensitive resin can be used. For example, a chemically amplified photosensitive resin based on a crosslinked resin, specifically, a chemically amplified photosensitive resin in which a crosslinking agent is added to polyvinylphenol and an acid generator is further added. In addition, as an acrylic negative photosensitive resin, a photopolymerization initiator that generates a radical component upon irradiation with ultraviolet rays, a component that has an acrylic group in the molecule, causes a polymerization reaction by the generated radical, and cures thereafter, What contains the functional group (for example, the component which has an acidic group in the case of image development by an alkaline solution) which can melt | dissolve an unexposed part by image development can be used. Among the above-mentioned components having an acrylic group, relatively low molecular weight polyfunctional acrylic molecules include dipentaerythritol hexaacrylate (DPHA), dipentaerythritol pentaacrylate (DPPA), tetramethylpentatriacrylate (TMPTA) and the like. Can be mentioned. Examples of the high molecular weight polyfunctional acrylic molecule include a polymer in which an acrylic group is introduced via an epoxy group into a part of the carboxylic acid group of the styrene-acrylic acid-benzyl methacrylate copolymer, and methyl methacrylate-styrene- An acrylic acid copolymer etc. are mentioned.
Further, the positive photosensitive resin is not particularly limited, and a general positive photosensitive resin can be used. For example, a chemically amplified photosensitive resin using a novolac resin as a base resin can be used.

  The light absorption layer may be formed on the transparent base material, for example, may be formed on the surface of the transparent base material where the colored layer is formed, or the surface opposite to the surface of the transparent base material where the colored layer is formed. In general, it is formed on the surface on which the colored layer of the transparent substrate is formed.

The light absorption layer may be formed at least as long as the white portion has the light absorption layer. For example, the light absorption layer 5 is patterned so that only the white portion 6 has the light absorption layer 5 as shown in FIG. As shown in FIG. 4A, the light absorption layer 5 is also formed on the colored layers of a plurality of colors, here, the red colored layer 4R, the green colored layer 4G, and the blue colored layer 4B. The light absorption layer 5 may be formed on the entire surface of the transparent substrate 2. As illustrated in FIG. 1, when only the white portion 6 has the light absorption layer 5, the transmittance of the light absorption layer does not affect the colored portion, and thus the transmittance of the colored portion is not reduced, and the white portion is transmitted. The characteristics can be optimized. On the other hand, as illustrated in FIG. 4A, when the light absorbing layer 5 is formed on the entire surface of the transparent substrate 2, the intensity of reflected light that causes reflection unevenness can be further attenuated. , Uneven reflection can be suitably suppressed.
Especially, it is preferable that only a white part has a light absorption layer from a viewpoint of providing a desired transmission characteristic to a white part.

  When the light absorption layer is formed in a pattern, the pattern shape of the light absorption layer is appropriately determined according to the pattern shape of the white portion.

  The thickness of the light absorption layer is appropriately selected according to the composition of the material of the light absorption layer and is not particularly limited, but is preferably the same thickness as a colored layer described later. It is because it becomes easy to form another structure on a coloring part and a white part. Specifically, the thickness of the light absorption layer is in the range of 0.1 μm to 10.0 μm, in particular in the range of 0.5 μm to 7.0 μm, and particularly in the range of 1.0 μm to 5.0 μm. preferable.

  As will be described later, when the blue colored layer contains a triarylmethane-based color material, the light absorption layer can be formed using the same material as the blue colored layer. In this case, as illustrated in FIG. 4B, the thickness of the light absorption layer 5 is made thinner than that of the blue colored layer 4B so that the white portion has a desired transmission characteristic.

  As a method for forming the light absorption layer, a general method for forming a resin layer can be applied.

2. White part The white part in this invention is formed in a pattern shape on a transparent base material, and has a light absorption layer containing a triarylmethane type | system | group coloring material.

  The pattern shape of the white part is appropriately determined depending on the pattern arrangement of the pixel part used in the organic EL display device. The pattern arrangement of the pixel portion can be the same as that used in a general organic EL display device, and specifically includes a stripe arrangement, a mosaic arrangement, a dot arrangement, a pen tile arrangement, and the like.

The transmission characteristics of the white part should be such that the yellow color of white light from the white light emitting layer can be reduced when the color filter for an organic EL display device of the present invention is used in an organic EL display device. That's fine.
For example, in the white part, the average transmittance in the wavelength range of 400 nm to 500 nm is 85% or more, preferably 93% or more, and the average transmittance in the wavelength range of 500 nm to 600 nm is preferably 60% or less. This is because the yellowishness of white light from the white light-emitting layer can be reduced by attenuating light in the green and yellow wavelength regions. Thereby, white with a good color balance can be displayed by the white subpixel of the organic EL display device using the color filter for organic EL display devices of the present invention.

  In the white portion, the average transmittance in the wavelength range of 650 nm to 700 nm is preferably 70% or less, and particularly preferably 65% or less. If the average transmittance in the above wavelength range is high, the reflected light is reddish in the white subpixel of the organic EL display device, and the screen may be reddish when the organic EL element is turned off, and the appearance may be impaired. is there. Some triarylmethane-based colorants have a relatively high transmittance in the red wavelength region. By using a combination of triarylmethane-based colorants and second colorants, the transmission characteristics of the white part can be improved. It can be adjusted and the appearance when turned off can be improved. In particular, from the viewpoint of preventing the reflected light from becoming reddish in the white subpixel of the organic EL display device, the average transmittance in the above wavelength region is more preferably 55% or less. Further, from the viewpoint of displaying white with good color balance in the white subpixel of the organic EL display device, the average transmittance in the above wavelength region is more preferably in the range of 55% to 70%.

  The average transmittance of the white part in the above wavelength region can be obtained by a general measurement method, for example, by measuring using a microspectroscope OSP-SP2000 manufactured by OLYMPUS.

  The transmission characteristics of the white part can be adjusted by the light absorption layer. Specifically, the transmission characteristics of the white portion can be adjusted by adjusting the type and content of the color material contained in the light absorption layer, the thickness of the light absorption layer, and the like.

The white portion only needs to have the light absorption layer, but may have only the light absorption layer 5 as illustrated in FIG. 1, for example, as shown in FIGS. 4 (c) and 4 (d). The light absorption layer 5 and the light adjustment layer 7 may be included. In the latter case, the light absorption layer and the light adjustment layer can be used together to adjust the transmission characteristics of the white part.
Hereinafter, the light adjustment layer will be described.

(Light adjustment layer)
The light adjustment layer constitutes a white part, and is composed of the same material as the blue colored layer when the colored part has a blue colored layer.

  As the formation position of the light adjustment layer, for example, the light adjustment layer 7 may be formed on the light absorption layer 5 as shown in FIG. 4C, and the light absorption layer 5 as shown in FIG. The light adjustment layer 7 may be formed on the same plane. In the former case, the thickness of the light adjusting layer is made thinner than the blue colored layer. In the latter case, the light adjustment layer can be formed continuously with the blue colored layer, and the light adjustment layer can be formed by a simple method.

  The pattern shape, thickness, and the like of the light adjustment layer are appropriately selected according to the transmission characteristics of the target white portion.

3. Colored part The colored part in the present invention has a plurality of colored layers formed in a pattern on a transparent substrate.

  The pattern shape of the colored layer is appropriately determined depending on the pattern arrangement of the pixel portion used in the organic EL display device.

  Examples of the multi-colored colored layer include a red colored layer, a green colored layer, and a blue colored layer. In addition to the red colored layer, the green colored layer, and the blue colored layer, other colored layers such as a yellow colored layer may be included.

The colored layer contains color materials such as pigments and dyes of various colors and resins.
In addition, about resin, since it can be made to be the same as that of resin used for the said light absorption layer, description here is abbreviate | omitted.

  Examples of the color material used for the red colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. These may be used alone or in combination of two or more.

  Examples of the color material used in the green colored layer include phthalocyanine pigments such as halogen multi-substituted phthalocyanine pigments or halogen multi-substituted copper phthalocyanine pigments, isoindoline pigments, and isoindolinone pigments. These may be used alone or in combination of two or more.

  Examples of the color material used for the blue colored layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments, and triarylmethane colorants. It is done. These may be used alone or in combination of two or more. Especially, it is preferable that a blue colored layer contains a triarylmethane type | system | group coloring material. This is because, in general, when a triarylmethane-based color material is used, a blue colored layer having a high transmittance can be obtained, and the light extraction efficiency can be increased.

  The content of the color material in each colored layer is appropriately selected according to the transmission characteristics of each desired colored layer.

  The thickness of the colored layer is appropriately selected according to the transmission characteristics of each desired colored layer. Specifically, the thickness of the colored layer can be made equal to the thickness of the light absorption layer.

  As a method for forming the colored layer, a general method for forming a colored layer in a color filter can be applied.

4). Transparent base material The transparent base material in this invention supports the said light absorption layer and colored layer.

The light transmittance of the transparent substrate should be such that when the color filter for an organic EL display device of the present invention is used in an organic EL display device, the light emitted from the light emitting layer can be transmitted and display can be performed. Although not particularly limited, the transmittance in the visible light region is preferably 80% or more, and more preferably 90% or more.
Here, the transmittance | permeability of a transparent base material can be measured by JISK7361-1 (the test method of the total light transmittance of a plastic-transparent material).

  Examples of the transparent substrate include inflexible rigid materials such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, or flexible materials such as resin films and optical resin plates. Can be used. Moreover, you may use what formed the barrier layer in the resin film.

  The thickness of the transparent substrate can be appropriately determined according to the use of the color filter for an organic EL display device of the present invention and the material constituting the transparent substrate.

5. Other Configurations The color filter for an organic EL display device of the present invention only needs to have the transparent substrate, the colored layer, and the light absorption layer, and can have other configurations as necessary. Examples of such a configuration include a light shielding portion, a protective layer, a TFT element, and an electrode layer.

(1) Light-shielding part In this invention, the light-shielding part may be formed in pattern shape on the transparent base material.
The shape of the opening of the light shielding portion is appropriately selected depending on the pattern arrangement of the pixel portion of the organic EL display device.
Examples of the light shielding part include those containing a metal material such as chromium, those obtained by dispersing a light shielding material in a resin, and those obtained by laminating a plurality of layers made of the same material as each colored layer.
A general thing can be applied about the material, thickness, its formation method, etc. of a light-shielding part.

(2) Protective layer In this invention, the protective layer may be formed so that a colored layer and a light absorption layer may be covered. The protective layer is particularly preferably used when the color filter for an organic EL display device of the present invention is used in a bottom emission type organic EL display device.
The material of the protective layer is not particularly limited as long as it does not impair the color characteristics of the color filter for an organic EL display device, particularly the above-described transmission characteristics of the white portion, and a general transparent resin can be used. Among these, a photocurable resin is preferable because it can be patterned.
About the thickness and formation of a protective layer, it can be made to be the same as that of the general protective layer in a color filter.

(3) TFT element When using the color filter for organic EL display devices of the present invention for a bottom emission type organic EL display device, the TFT element may be formed on a transparent substrate. As the TFT element, a general element can be used.

(4) Electrode layer In this invention, the electrode layer may be arrange | positioned on the colored layer and the light absorption layer.
Examples of the electrode layer include a metal electrode layer and a transparent electrode layer.
The metal electrode layer can be formed in a region not used for display in the color filter for an organic EL display device, such as on the light shielding portion.

B. Organic EL Display Device The organic EL display device of the present invention has the above-described color filter for organic EL display device and an organic EL element that is disposed on the color filter for organic EL display device and includes a white light emitting layer. It is a feature.

  According to the present invention, by having the above-described color filter for an organic EL display device, it is possible to perform display with high luminance while suppressing display defects due to reflection of external light, and furthermore, color balance with white subpixels. Good white color can be displayed. In addition, an organic EL display device having an organic EL element that emits white light can be provided at low cost.

The organic EL display device of the present invention may be a top emission type or a bottom emission type.
In the case of the top emission type, for example, as shown in FIG. 2, the color filter 1 for the organic EL display device and the organic EL element base material 11 are arranged to face each other. In the case of the bottom emission type, although not shown, for example, an organic EL element is formed on a protective layer of a color filter for an organic EL display device, and a sealing substrate is disposed on the organic EL element.

  The color filter for the organic EL display device has been described in detail in the above section “A. Color filter for organic EL display device”, and thus the description thereof is omitted here. Hereinafter, another configuration of the organic EL display device of the present invention will be described.

1. Organic EL Element The organic EL element used in the present invention has a transparent electrode layer, a metal electrode layer, and an organic EL layer that is formed between the transparent electrode layer and the metal electrode layer and includes a white light emitting layer. . Moreover, the organic EL element may have an insulating layer, a partition, etc. as needed.
Hereinafter, each configuration of the organic EL element will be described.

(1) Organic EL layer The organic EL layer has one or more organic layers including at least a white light emitting layer.
Examples of the layer constituting the organic EL layer include a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer in addition to the light emitting layer.
Hereinafter, each structure of the organic EL layer will be described.

(A) Light emitting layer As a light emitting layer, at least the light emitting layer corresponding to a white subpixel should just be a white light emitting layer. For example, the light emitting layers may be all white light emitting layers, and the red light emitting layer, the green light emitting layer, the blue light emitting layer, and the white light emitting layer corresponding to the red subpixel, the green subpixel, the blue subpixel, and the white subpixel, respectively. You may have.

Examples of the white light emitting layer include a single white light emitting layer, a light emitting layer having two or more different light emitting layers, specifically, a red light emitting layer, a green light emitting layer and a blue light emitting layer laminated, or a blue light emitting layer. And a layer in which a yellow light emitting layer is laminated.
Further, the light emitting layer corresponding to the colored subpixel may be the white light emitting layer described above, or may be a layer that emits light of a color corresponding to the color of each colored subpixel.
About the kind of light emitting layer, it can select suitably according to the use etc. of an organic electroluminescence display.

Moreover, it is preferable that the correlated color temperature of the white light emitted from the white light emitting layer of the organic EL element is in the range of 4000K to 8000K. When the correlated color temperature of the white light is within the above range, the light becomes yellowish white light. However, in the present invention, the yellow color of the white light is reduced by using the above-described color filter for an organic EL display device. White with good color balance can be displayed.
The correlated color temperature can be determined based on JIS Z8725: 1999 (light source distribution temperature and color temperature / correlated color temperature measurement method).

  Note that the material, thickness, formation method, and the like of the light-emitting layer can be the same as those of a general light-emitting layer, and thus description thereof is omitted here.

(B) Hole Injecting and Transporting Layer In the present invention, a hole injecting and transporting layer may be formed between the light emitting layer and the anode.
The hole injection transport layer may be a hole injection layer having a hole injection function, or a hole transport layer having a hole transport function, and the hole injection layer and the hole transport layer are laminated. And may have both a hole injection function and a hole transport function.
Note that the material, thickness, formation method, and the like of the hole injecting and transporting layer can be the same as those of a general hole injecting and transporting layer, and thus description thereof is omitted here.

(C) Electron injection / transport layer In the present invention, an electron injection / transport layer may be formed between the light-emitting layer and the cathode.
The electron injection / transport layer may be an electron injection layer having an electron injection function, may be an electron transport layer having an electron transport function, or may be a laminate of an electron injection layer and an electron transport layer. It may have both an electron injection function and an electron transport function.
Note that the material, thickness, formation method, and the like of the electron injecting and transporting layer can be the same as those of a general electron injecting and transporting layer, and thus description thereof is omitted here.

(2) Transparent electrode layer and metal electrode layer One of the transparent electrode layer and the metal electrode layer is an anode and the other is a cathode.
In addition, since it can be the same as that of the general electrode in an organic EL element about the material of a transparent electrode layer and a metal electrode layer, thickness, a formation method, etc., description here is abbreviate | omitted.

(3) Insulating layer In the present invention, the insulating layer may be formed in a pattern. The insulating layer defines a pixel and is provided for preventing a short circuit between the transparent electrode layer and the metal electrode layer. The pattern shape of the insulating layer is appropriately selected according to the arrangement of the pixels, and examples thereof include a lattice shape.
Note that the material, thickness, formation method, and the like of the insulating layer can be the same as those of a general insulating layer in an organic EL element, and thus description thereof is omitted here.

(4) Partition Wall In the present invention, the partition wall may be formed in a pattern on the insulating layer. A partition is provided in order to pattern an organic EL layer and an electrode layer.
In addition, about the material, thickness, formation method, etc. of a partition, since it can be the same as that of the general partition in an organic EL element, description here is abbreviate | omitted.

2. In the case of a top emission type organic EL display device, the organic EL element is formed on the counter substrate.
In the top emission type organic EL display device, the color filter side for the organic EL display device becomes a light emitting surface, and therefore the opposing base material may or may not have light transmittance.
Examples of the opposing substrate include inflexible rigid materials such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, or flexible materials such as resin films and optical resin plates. Can be used. Moreover, you may use what formed the barrier layer in the resin film.
A TFT element may be formed on the counter substrate. As the TFT element, a general element can be used.

3. Sealing base material In the case of a bottom emission type organic EL display device, a sealing base material is disposed on the organic EL element.
In the bottom emission type organic EL display device, the color filter side for the organic EL display device becomes the light emitting surface, and therefore the sealing substrate may or may not have light transmittance.
The sealing substrate can be the same as the counter substrate.

4). Other Configurations The sealing structure of the organic EL display device of the present invention may be, for example, hollow sealing or solid sealing. As the sealing material, a general material can be used.

  As a method for driving the organic EL display device of the present invention, either a passive matrix or an active matrix can be applied.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and that exhibits the same effects. Are included in the technical scope.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

[Example 1]
(Preparation of curable resin composition A)
In a polymerization tank, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour. Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition A>
-Copolymer resin solution (solid content 50%)-16 parts by mass-Dipentaerythritol pentaacrylate (Sartomer SR399)-24 parts by mass-Orthocresol novolac epoxy resin (Oka Shell Epoxy Epicoat 180S70)-4 parts by mass Parts · 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one ... 4 parts by mass · diethylene glycol dimethyl ether ... 52 parts by mass

(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed with a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
Black pigment (Mitsubishi Chemical Corporation # 2600) ... 20 parts by mass Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 111) ... 16 parts by mass Solvent (diethylene glycol dimethyl ether): 64 parts by mass

Next, the following components were sufficiently mixed to obtain a light shielding part composition.
<Composition of composition for light shielding part>
-Black pigment dispersion-50 parts by mass-Curable resin composition A-20 parts by mass-Diethylene glycol dimethyl ether-30 parts by mass

  On the board | substrate, the said composition for light shielding parts was apply | coated with the spin coater, and it was made to dry for 3 minutes at 100 degreeC, and the layer for light shielding part formation was formed. The light-shielding part forming layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution, and then the substrate is left to stand in an atmosphere at 230 ° C. for 30 minutes for heat treatment. To form a light shielding part.

(Formation of red colored layer)
On the substrate, a red curable resin composition having the following composition was applied by spin coating, and then dried in an oven at 70 ° C. for 3 minutes. Next, a photomask is placed at a distance of 100 μm from the coating film of the red curable resin composition, and an ultraviolet ray is applied only to the region corresponding to the formation region of the red colored layer using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Was irradiated for 10 seconds. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali development was carried out, and only the uncured part of the coating film of a red curable resin composition was removed. Thereafter, the substrate was left in an atmosphere at 170 ° C. for 15 minutes to perform heat treatment, thereby forming a red colored layer pattern on the red subpixel in the display region.

<Composition of red curable resin composition>
・ C. I. Pigment Red 177 3 parts by mass, C.I. I. Pigment Red 254 ... 4 parts by mass, polysulfonic acid type polymer dispersant ... 3 parts by mass, the above curable resin composition A ... 23 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

(Formation of green colored layer)
Next, in the same process as the formation of the red colored layer, a green curable resin composition having the following composition was applied on the substrate to form a green colored layer pattern on the green subpixel in the display area.

<Composition of green curable resin composition>
・ C. I. Pigment Green 58: 7 parts by mass / C.I. I. Pigment Yellow 138 1 part by mass, polysulfonic acid type polymer dispersant 3 parts by mass, the curable resin composition A 22 parts by mass, and 3-methoxybutyl acetate 67 parts by mass.

(Formation of blue colored layer)
Furthermore, in the same process as the formation of the red colored layer, a blue curable resin composition having the following composition was applied on the substrate to form a blue colored layer pattern on the blue subpixel in the display region.

<Composition of blue curable resin composition>
・ C. I. Pigment Blue 1 ... 5 parts by mass, polysulfonic acid type polymer dispersant ... 3 parts by mass, the curable resin composition A ... 25 parts by mass, and 3-methoxybutyl acetate ... 67 parts by mass

(Formation of light absorption layer)
Further, in the same process as the formation of the red colored layer, a light absorbing layer resin composition having the following composition was applied on the substrate to form a light absorbing layer pattern on the white subpixel in the display region.

<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 1 ... 1 part by mass, polysulfonic acid type polymer dispersant ... 0.3 part by mass, the curable resin composition A ... 31.7 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

  By performing the above steps, a color filter for an organic EL display device was obtained.

(Production of organic EL display device)
An organic EL element substrate in which an organic EL element having a white light emitting layer was formed on a substrate was prepared. When the emission temperature was measured with an ultra-low luminance spectral radiometer SR-UL1 manufactured by Topcon Corporation and the color temperature was calculated, the correlated color temperature of white light from the white light emitting layer of the organic EL element was 5900K.
An optical elastic resin was applied to the obtained color filter for an organic EL display device and bonded to an organic EL element substrate in a vacuum to obtain an organic EL display device.

[Example 2]
A color filter for an organic EL display device and an organic EL display device were produced in the same manner as in Example 1 except that the following resin composition for a light absorbing layer was used.

<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 1 0.5 mass part C.I. I. Pigment Blue 15: 6: 0.5 part by mass, polysulfonic acid type polymer dispersant: 0.3 part by mass, the curable resin composition A: 31.7 parts by mass, 3-methoxybutyl acetate: 67 parts by mass

[Example 3]
(Preparation of blue color material 1)
Wako Pure Chemical Industries, Ltd. 1-iodonaphthalene 15.2 g (60 mmol), Mitsui Chemicals, Inc. norbornanediamine (NBDA) (CAS No. 56602-77-8) 4.63 g (30 mmol), sodium-tert- Butoxide 8.07 g (84 mmol), Aldrich 2-dicyclohexylphosphino-2 ′, 6 ′,-dimethoxybiphenyl 0.09 g (0.2 mmol), Wako Pure Chemical Industries, Ltd. Palladium acetate 0.021 g (0.1 mmol) ) And xylene were dispersed in 30 mL and reacted at 130 to 135 ° C. for 48 hours. After completion of the reaction, the mixture was cooled to room temperature and extracted with water. Next, it was dried over magnesium sulfate and concentrated to obtain 8.5 g of intermediate 1 represented by the following chemical formula (I) (yield 70%). The obtained compound was confirmed to be the target compound from the following analysis results.
MS (ESI) (m / z): 407 (M + H),
Elemental analysis value: CHN actual measurement value (85.47%, 8.02%, 6.72%); theoretical value (85.26%, 8.11%, 6.63%)

8.46 g (20.8 mmol) of Intermediate 1 and 4,4′-bis (dimethylamino) benzophenone 13.5 g (41.6 mmol) 60 mL of toluene manufactured by Tokyo Chemical Industry Co., Ltd. were added and stirred at 45 ° C. to 50 ° C. 6.38 g (51.5 mmol) of phosphorus oxychloride manufactured by Wako Pure Chemical Industries, Ltd. was added dropwise, refluxed for 2 hours and cooled. After completion of the reaction, toluene was decanted. The resinous precipitate was dissolved by adding chloroform (40 mL), water (40 mL) and concentrated hydrochloric acid, and the chloroform layer was separated. The chloroform layer was washed with water, dried over magnesium sulfate and concentrated. 65 mL of ethyl acetate was added to the concentrate and refluxed. After cooling, the precipitate was filtered to obtain 15.9 g (yield 70%) of blue color material 1 (BB7-Nb-dimer) represented by the following chemical formula (II).
The obtained compound was confirmed to be the target compound from the following analysis results.
MS (ESI) (m / z): 511 (+), divalent Elemental analysis value: CHN measured value (78.13%, 7.48%, 7.78%); theoretical value (78.06%) , 7.75%, 7.69%)

(Production of color filter for organic EL display device and organic EL display device)
A color filter for an organic EL display device and an organic EL display device were produced in the same manner as in Example 1 except that the following resin composition for a light absorbing layer was used.

<Composition of the resin composition for light absorption layers>
-Blue color material 1 ... 1 part by mass-Polysulfonic acid type polymer dispersant-0.3 part by mass-Curable resin composition A-31.7 parts by mass-3-methoxybutyl acetate-67 parts by mass

[Example 4]
(Preparation of blue color material 2)
Kanto Chemical Co., Ltd. 12 molybdophosphoric acid n hydrate 0.433g (0.18mmol, n is equivalent to 30) and Kanto Chemical Co. 12 tungstophosphoric acid n hydrate 3.55g (1.04mmol, n is 30) Equivalent) was dissolved in 50 mL of water. Thereto was added 2.0 g (1.83 mmol) of blue color material 1 (intermediate 2) dissolved in a mixed solvent of 50 mL of water and 100 mL of methanol, and the mixture was stirred at room temperature for 1 hour. The reaction solution was collected by filtration under reduced pressure and washed with water. The cake was dried under reduced pressure to obtain a blue color material 2 having a molar ratio of molybdenum to tungsten of 14.6: 85.4.

(Production of color filter for organic EL display device and organic EL display device)
A color filter for an organic EL display device and an organic EL display device were produced in the same manner as in Example 1 except that the following resin composition for a light absorbing layer was used.

<Composition of the resin composition for light absorption layers>
-Blue color material 2 ... 1 part by mass-Polysulfonic acid type polymer dispersant-0.3 part by mass-Curable resin composition A-31.7 parts by mass-3-methoxybutyl acetate-67 parts by mass

[Example 5]
(Preparation of blue color material 3)
The molar ratio of molybdenum to tungsten is the same as the synthesis of the blue colorant 2, except that 0.014 g of 12 molybdophosphoric acid · n hydrate and 4.15 g of 12 tungstophosphoric acid · n hydrate are used. A blue color material 3 of 0.4: 99.6 was obtained.

(Production of color filter for organic EL display device and organic EL display device)
A color filter for an organic EL display device and an organic EL display device were produced in the same manner as in Example 1 except that the following resin composition for a light absorbing layer was used.

<Composition of the resin composition for light absorption layers>
-Blue color material 3 ... 1 part by mass-Polysulfonic acid type polymer dispersant-0.3 part by mass-Curable resin composition A-31.7 parts by mass-3-methoxybutyl acetate-67 parts by mass

[Comparative Example 1]
A color filter for an organic EL display device and an organic EL display device were produced in the same manner as in Example 1 except that the following resin composition for a light absorbing layer was used.

<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 15: 6 ... 0.7 parts by mass I. Pigment Violet 23: 0.3 part by mass, polysulfonic acid type polymer dispersant: 0.3 part by mass, the curable resin composition A: 31.7 parts by mass, 3-methoxybutyl acetate: 67 parts by mass

[Comparative Example 2]
A color filter for an organic EL display device and an organic EL display device were produced in the same manner as in Example 1 except that the following resin composition for a light absorbing layer was used.

<Composition of the resin composition for light absorption layers>
・ C. I. Pigment Blue 15: 6: 1.4 parts by mass I. Pigment Violet 23: 0.6 parts by mass, polysulfonic acid type polymer dispersant: 0.6 parts by mass, curable resin composition A: 30.4 parts by mass, 3-methoxybutyl acetate: 67 parts by mass

[Evaluation]
(Transmittance of white part)
The transmission spectrum of the white part of the color filter for organic EL display devices of Examples and Comparative Examples was measured using a microspectroscope OSP-SP2000 manufactured by OLYMPUS. The results are shown in FIG.

(Chromaticity of transmitted light in the white part)
About the transmitted light in the white part of the obtained organic EL display device, the chromaticity coordinates x, y and the brightness Y in the xy chromaticity diagram of the CIE1931-XYZ color system are used, and the spectroradiometer SR-UL1 manufactured by Topcon Corporation is used. And measured. The results are shown in Table 1.

  In Comparative Example 1, the transmitted light in the white part was yellowish, and in Comparative Example 2, the white coordinate was good but the brightness Y was low. On the other hand, in all of Examples 1 to 5, yellowness of white light was reduced, and white coordinates and brightness Y were good.

(External light reflection)
The obtained organic EL display device was visually evaluated under a D65 light source. The visibility of the organic EL display devices of Examples and Comparative Examples was not deteriorated by reflected light.

DESCRIPTION OF SYMBOLS 1 ... Color filter for organic EL display devices 2 ... Transparent base material 3 ... Light-shielding part 4R ... Red colored layer 4G ... Green colored layer 4B ... Blue colored layer 4 ... Colored part 5 ... Light absorption layer 6 ... White part 10 ... Organic EL Display device 12 ... Counter substrate 13 ... Metal electrode layer 14 ... Organic EL layer 15 ... Transparent electrode layer 16 ... Organic EL element 17 ... Sealing material

Claims (6)

A transparent substrate;
A colored portion having a colored layer of a plurality of colors formed in a pattern on the transparent substrate;
A color filter for an organic electroluminescence display device, comprising: a white part having a light absorption layer formed in a pattern on the transparent substrate and containing a triarylmethane colorant.   The color filter for an organic electroluminescence display device according to claim 1, wherein the light absorption layer further contains a second color material.   The color filter for an organic electroluminescence display device according to claim 1, wherein the colored portion has a blue colored layer, and the blue colored layer contains a triarylmethane color material. The color filter for an organic electroluminescence display device according to any one of claims 1 to 3, wherein the triarylmethane colorant is a compound represented by the following formula (1).
(In the formula (1), A is an a-valent organic group in which the carbon atom directly bonded to N does not have a π bond, and the organic group is saturated aliphatic hydrocarbon at the terminal directly bonded to N. Represents an aliphatic hydrocarbon group having a group or an aromatic group having the aliphatic hydrocarbon group, and the carbon chain may contain O, S, and N. B ^c- represents a c-valent anion. R ^{1 to} R ⁵ each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ combine to form a ring structure may .Ar ¹ also represents a divalent aromatic group which may have a substituent. plural R ¹ to R ⁵ and Ar ¹ a respectively identical A and c are integers of 2 or more, and b and d are integers of 1 or more.)   The white part has an average transmittance of 93% or more in a wavelength region of 400 nm to 500 nm, an average transmittance of a wavelength region of 500 nm to 600 nm is 60% or less, and an average transmittance of a wavelength region of 650 nm to 700 nm. The color filter for organic electroluminescence display devices according to any one of claims 1 to 4, wherein the color filter is 70% or less. A color filter for an organic electroluminescence display device according to any one of claims 1 to 5,
An organic electroluminescence display device comprising: an organic electroluminescence element disposed on the organic electroluminescence display device layer color filter and including a white light emitting layer.