JP4852790B2 - Manufacturing method of transfer type color filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adhesive used for producing a transfer type color filter incorporated in a color liquid crystal display device, and particularly has a photosensitive solvent-free alkali solubility and is suitable for a reflective liquid crystal display device. The present invention relates to an adhesive for color filters having light scattering properties.
[0002]
[Prior art]
In recent years, with the development of personal computers, particularly with the development of portable personal computers, the demand for color liquid crystal display devices tends to increase. However, for further spread, cost reduction, low power consumption, and light weight are required.
Therefore, in order to sufficiently cope with costs, for example, a transfer sheet using a metal thin plate having a thermal expansion coefficient substantially the same as that of a glass substrate used for a color filter as a transfer substrate is used to simplify the manufacturing process. A method of manufacturing a color filter has been proposed. In this method, a color filter layer is once formed on a transfer substrate, and then this color filter layer is transferred onto a glass substrate via an adhesive.
[0003]
According to this method, the surface of the obtained color filter is highly smooth, and the step of repeatedly forming a predetermined number of colors such as red (R), green (G), and blue (B) is performed on the glass substrate. In contrast, it is performed separately on the transfer substrate.
Therefore, it is preferable in terms of improving the production efficiency as a whole process for producing a color filter of a liquid crystal display device, because it is possible to perform a troublesome color filter production process in a separate process from the color filter production line of the glass substrate. I can say that. However, there arises a problem that the cost of the material increases as much as the adhesive is interposed as compared with the conventional color filter.
[0004]
On the other hand, as a liquid crystal display device, as viewed from the observer side, a light source (lamp) is arranged on the back surface or side surface of the substrate located on the back side, and a screen is displayed with light rays emitted from the light source. A transmissive liquid crystal display device with a built-in lamp or a light guide type is widely used.
However, since a transmissive liquid crystal display device with a built-in lamp consumes a large amount of power by a built-in light source, a reflective liquid crystal display device that does not incorporate a light source and can be reduced in weight with lower power consumption has attracted attention.
[0005]
In a reflection type liquid crystal display device, since it is portable and does not choose the place of use, it must be assumed that outside light such as room light and natural light enters at all angles, and at the same time, only a specific area The light source must also be assumed.
Therefore, in order to obtain a bright and clear screen display with an appropriate viewing angle in the reflective liquid crystal display device, the light incident on the device is efficiently introduced into the liquid crystal, and the light reflected by the back side electrode substrate is efficiently It is necessary to guide to the position of the observer. For this reason, the reflective liquid crystal display device has a function of scattering incident light.
[0006]
1 and 2 are explanatory views schematically showing an example of the structure of a reflective liquid crystal display device that has been put into practical use.
In the reflection type liquid crystal display device shown in FIG. 1, the observer side electrode substrate (17) has a light scattering film (11) for generating light refraction and diffraction on the surface of the transparent substrate (12) facing the observer. A color filter (13) and a liquid crystal driving transparent electrode (14) are sequentially laminated on the other surface side of the transparent substrate (12). As a light scattering film, a film in which scattering particles are dispersed in a transparent resin is generally used.
In the back side electrode substrate (18), a reflective electrode (16) that combines a light reflecting plate and a liquid crystal driving electrode is disposed on a transparent substrate (19). The liquid crystal (15) is held between the side electrode substrate (18).
[0007]
In the reflection type liquid crystal display device shown in FIG. 1, the reflection electrode (16) is a flat surface and regularly reflects light incident on the reflection electrode (16). Light scattering is a light provided on the observer side electrode substrate 17. The scattering film (11) is used.
In the reflective liquid crystal display device shown in FIG. 2, a color filter (23) for coloring transmitted light in a predetermined color and a transparent electrode (24) for driving liquid crystal are sequentially laminated on a transparent substrate (22). Liquid crystal (on the observer side electrode substrate (26)) and on the back side electrode substrate (27) in which the reflection electrode (21) that combines the light reflection plate and the electrode for driving the liquid crystal is disposed on the transparent substrate (29). 25).
In the reflective liquid crystal display device of FIG. 2, the light incident on the reflective electrode (21) is reflected as scattered light by forming the surface of the reflective electrode to be uneven.
[0008]
In the method of FIG. 1 described above, a light scattering film (11) must be formed on the front side of the observer side electrode substrate (17). In the case of FIG. 2, the back side electrode substrate (27) is formed. Irregularities must be formed on the reflective electrode substrate (21).
For this reason, an increase in cost such as an increase in the number of manufacturing steps and a decrease in manufacturing yield is inevitable.
[0009]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide an adhesive for color filters, which is an adhesive used for manufacturing a transfer type color filter and has light scattering properties.
By adopting a transfer-type color filter manufactured using this adhesive, a light-scattering film that scatters incident light can be used in a reflective liquid crystal display device in order to obtain a viewing angle at which the screen can be viewed brightly. Alternatively, it is possible to inexpensively manufacture a reflective liquid crystal display device having an appropriate viewing angle without forming irregularities on the surface of the reflective electrode.
[0010]
[Means for Solving the Problems]
The present invention provides a method for producing a transfer type color filter in which a transfer sheet on which a color filter layer is formed and a transparent substrate are brought into close contact with each other via an adhesive, and then the adhesive is cured and the transfer sheet is peeled off. Is a photosensitive solvent-free resin composition mainly composed of a resin, a dilution monomer, a photosensitizer, and transparent particles, and the resin is an acrylic copolymer having an ethylenically unsaturated group and a carboxyl group. There is a method for producing a transfer-type color filter and having a light scattering property.
[0011]
Further, according to the present invention, the acrylic copolymer is an acrylic copolymer having a molecular weight of 1,000 to 100,000, a double bond equivalent of 3 × 10 ³ or less, and a carboxyl group having a resin acid value of 50 to 150. The method for producing a transfer type color filter according to claim 1 .
[0013]
Further, the present invention is a method for producing a transfer type color filter according to any one of claims 1 to 2, characterized in that it contains at least 5 wt% or more thermosetting components to the acrylic copolymer.
[0014]
Further, the present invention is a method for producing a transfer-type color filter according to claim 1, wherein the boiling point of said diluent monomer is 200 ° C. or higher.
[0015]
Further, the present invention is a layer in which the photocured adhesive comprises a transparent resin having a first refractive index and a plurality of the transparent particles having a second refractive index dispersed in the transparent resin. The ratio of the other of the first and second refractive indexes to the other is 1.00 or more and 1.08 or less, and the surfaces of the plurality of transparent particles are smooth, and the smooth surfaces are convex or convex and flat. method for producing a transfer type color filter according to any one of claims 1 to 4, characterized in that one of a combination of.
[0016]
Further, in the present invention, at least some of the plurality of transparent particles each have a center of symmetry, and the transfer type color filter manufacturing method according to any one of claims 1 to 5 is there.
[0017]
Further, according to the present invention, the transparent particles having the center of symmetry each have a spherical shape, a spheroid shape having a minor axis of an ellipse as a rotation axis, or a disk shape. a method for producing a transfer type color filter according to any one of claims 1 to 6, wherein.
[0018]
Further, according to the present invention, the plurality of transparent particles are each composed of either a resin or an inorganic compound, The method for producing a transfer type color filter according to any one of claims 1 to 7 It is.
[0019]
The present invention is the method for producing a transfer type color filter according to any one of claims 1 to 9 , wherein each of the plurality of transparent particles is made of an optically isotropic material. .
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an adhesive for color filters having light scattering properties according to the present invention will be described in detail based on an embodiment thereof.
An adhesive for a color filter having light scattering properties according to the present invention is a photosensitive solventless color filter adhesive mainly composed of a resin, a dilution monomer, a photosensitizer, and transparent particles, wherein the resin is ethylene. Although it is an acrylic copolymer having a polymerizable unsaturated group and a carboxyl group, a thermosetting component, an additive and the like are used as necessary.
[0021]
The acrylic copolymer having an ethylenically unsaturated group and a carboxyl group preferably has a double bond equivalent of 3 × 10 ³ or less from the viewpoint of sensitivity, and the carboxyl group has a resin acid value from the viewpoint of solubility. A range of 50 to 150 is preferred. When the acid value is 50 or less, the solubility is lowered, and the adhesive cannot be completely removed and remains in the periphery of the transfer sheet on the glass substrate. On the other hand, when the acid value is 150 or more, there is a problem that the peripheral portion of the transfer sheet cannot be obtained due to swelling when the adhesive is removed. The molecular weight of the acrylic copolymer is preferably in the range of 1,000 to 100,000 . When the molecular weight is 1 × 10 ³ or less, the sensitivity is lowered, and 100 × 10 ³ Above, alkali solubility falls.
[0022]
The acrylic copolymer in the present invention includes an acrylic copolymer of a monomer having a glycidyl group and an ethylenically unsaturated group such as glycidyl methacrylate (GMA), an ethylenically unsaturated group such as acrylic acid, and a carboxyl group. Acrylic copolymer of a monomer having an ethylenically unsaturated group and a carboxyl group, such as acrylic acid, and an acid anhydride such as phthalic anhydride and tetrahydrophthalic anhydride Examples thereof include a resin in which a monomer having a glycidyl group and an ethylenically unsaturated group such as GMA is added to the coalescence.
In addition, phenolic novolac resin, cresol novolac resin, bisphenol type epoxy resin, etc., after adding carboxylic acid having ethylenically unsaturated group such as acrylic acid, phthalic anhydride and tetrahydrophthalic anhydride are also added. Can be used.
[0023]
The dilution monomer in the present invention preferably has a boiling point of 200 ° C. or higher so as not to cause foaming or the like at the time of curing, and may be diluted to an appropriate viscosity in accordance with the operation at the time of bonding.
For example, polyfunctional monomers such as dipentaerythritol hexaacrylate and ditrimethylolpropane tetraacrylate, trifunctional monomers such as pentaerythritol triacrylate and trimethylolpropane triacrylate, 1.6 hexanediol diacrylate, neopentyl glycol diacrylate, polyethylene Bifunctional monomers such as glycol diacrylate, monofunctional monomers such as phenoxyethyl acrylate, tricyclodecyl acrylate, isobornyl acrylate, lauryl acrylate, hydroxyethyl acrylate, 2-acryloyloxyethyl monophthalate, and polyol compounds having two or more hydroxyl groups , Urethane acrylates comprising isocyanate compounds and (meth) acrylates having hydroxyl groups, Po carboxymethyl acrylate and the like, can be used in combination as appropriate.
[0024]
The photosensitizer in the present invention is not particularly limited, and benzophenone, diethylaminobenzophenone, methyl benzoylbenzoate, benzoin isopropyl ether, 2-hydroxy-2-methylpropiophenone, benzyldimethyl ketal, thioxanthone, diethylthioxanthone, 2 -Methyl {4- (methylthio) phenyl} -2-morpholino-1-propanone, etc. are mentioned, and the addition amount is preferably 0.1 to 20 parts by weight with respect to the total amount of the resin and the diluted monomer.
[0025]
Additives include polymerization inhibitors such as hydroquinone and hydroquinone monomethyl ether, adhesion imparting agents such as silane coupling agents and titanium coupling agents, and thermosetting components such as epoxy resins, polyols and melamine resins. Of these, when there are few thermosetting components, many carboxylic acid groups remain in the cured resin and the water resistance is lowered. The addition amount is preferably ½ equivalent or more with respect to the carboxylic acid in the acrylic copolymer.
[0026]
Examples of the transparent particles in the present invention include particles made of silica, alumina or the like as transparent particles made of an inorganic oxide. The transparent particles made of resin include acrylic particles, styrene acrylic particles and their crosslinked products, melamine-formalin condensate particles, PTFE (polytetrafluoroethylene), PFA (perfluoroalkoxy resin), FEP (terafluoroethylene- Examples thereof include fluorine-containing polymer particles such as hexafluoropropylene copolymer), PVDF (polyfluorovinylidene), and ETFE (ethylene-terolafluoroethylene copolymer), and silicone resin particles.
Among such resins, it is preferable to use a silicone resin, a melamine resin, a fluorine-based acrylate resin, or the like. In addition, since many of the transparent resins have a relatively low refractive index, silica particles and silicone resin particles are particularly suitable because of their small refractive index of 1.40 to 1.45 (halogen lamp D line 589 nm). .
[0027]
The above-mentioned transparent particles can be subjected to an appropriate surface treatment for the purpose of improving the dispersibility with respect to the resin. Examples of such surface treatment include SiO2, ZrO2, Al2O3, ZnO, a transparent resin, a coupling agent such as a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent on the surface of the transparent particles, or The process which coat | covers and coats a surfactant can be mentioned.
Moreover, the process which produces reaction on the surface of a transparent particle using alcohol, an amine, or an organic acid etc. can also be mentioned.
[0028]
The adhesive according to the present invention is a transfer color filter adhesive having light scattering properties by adding transparent particles to the adhesive used for transfer to add the properties of a light scattering film having excellent resolution. Therefore, it is possible to manufacture a transfer type color filter having a light scattering property with the same number of manufacturing steps as that of a normal transfer type color filter and hardly increasing the manufacturing cost. By adopting the transfer type color filter according to the above, it is possible to reduce the manufacturing and material costs as a liquid crystal display device.
[0029]
Moreover, since the adhesive layer having light scattering properties is positioned between the color filter and the transparent substrate, the surface state of the color filter is not changed, and the subsequent processes are processed in the same manner as the conventional methods. It is possible.
Further, in the production of the transfer type color filter, it is not necessary to use an organic solvent because the excess adhesive around the transfer sheet can be removed by liquid phase treatment with an alkaline aqueous solution. Therefore, the influence of organic solvents on work safety, health, and environment is eliminated. In addition, since the transfer sheet and the glass substrate coated with the adhesive can be pressed and pressed at room temperature without heating, there is no dimensional difference between the transfer base of the transfer sheet and the glass substrate due to heating. Become. Furthermore, since the transfer sheet and the glass substrate are brought into close contact with each other and pressed immediately after the adhesive is dropped onto the transfer sheet, it is possible to prevent the occurrence of white spots due to the adhesion of foreign matters during the process.
[0030]
FIGS. 3A to 3F are explanatory views showing, in cross section, a process of manufacturing a transfer type color filter to which light scattering property is added using the light scattering adhesive for light scattering property according to the present invention. .
FIG. 3A shows a transfer sheet (37) in which a release layer (32) is already provided on a transfer substrate (31), and a light shielding layer (33), color filter on the transfer sheet (37). The state in which the layer (34) and the like are formed is shown.
The color filter layer (34) is formed by an arbitrary method such as a pigment dispersion method or a dyeing method, and has a pixel shape, for example, red (R), green (G), blue (B). The three primary colors.
[0031]
As shown in FIG. 3 (b), the photosensitive solvent-free light scattering adhesive (35) according to the present invention is dropped onto the color filter layer (34) on the transfer sheet (37). To do.
Next, as shown in FIG. 3 (c), the transfer sheet (33) and the color filter layer (34) are formed by aligning the position with the transparent substrate (36) and pressing (40) from above and below. 37) and a transparent substrate (36) are closely attached via an adhesive (35).
[0032]
Subsequently, as shown in FIG. 3 (d), the photomask (60) is overlaid, and the adhesive in the region to be transferred of the light shielding layer (33) and the color filter layer (34) is cured by light irradiation, and the adhesive layer (35 ''). Next, the transfer sheet (37) shown in FIG. 3 (e) is peeled off, and the adhesive (35 ′) protruding to the periphery of the transfer sheet is removed using an alkaline aqueous solution, and shown in FIG. 3 (f). Thus, a transfer type color filter in which the light shielding layer (33) and the color filter layer (34) are transferred and formed on the transparent substrate (36) through the adhesive layer (35 ″) is obtained.
[0033]
【Example】
Examples of the present invention will be specifically described below.
<Example 1>
[Create transfer sheet]
First, 42 alloy (nickel weight%, remaining iron) having a thickness of 0.15 mm was used as a transfer substrate. 6 wt% polyvinyl alcohol was applied to a thickness of 5 to 10 μm by a dip coater method, and then dried in an atmosphere at 150 ° C. to obtain a release layer.
On this release layer, a red acrylic pigment-dispersed photosensitizer having the following composition was applied with a reverse coater, dried and then irradiated with light through a photomask having a predetermined pattern, developed with an alkaline developer, washed with water, and washed at 150 ° C. for 5 hours. Dried for minutes.
In the same manner, a color filter layer and a light-shielding layer were formed at predetermined positions using green, blue and black acrylic pigment-dispersed photosensitizers to obtain transfer sheets.
[0034]
The composition of the acrylic pigment dispersant used is as follows.
A: 10 parts by weight of pigment The pigment is indicated by a color index (CI number).
Red: C.I. I. Red pigment 177
Green: C.I. I. Green pigment 36 and C.I. I. Yellow pigment 139
Blue: C.I. I. Blue pigment 15
Black: C.I. I. Black pigment 7
B: Anionic acrylic copolymer having the following composition: 10 parts by weight Methyl methacrylate 2 parts by weight Methacrylic acid 1 part by weight Hydroxy methacrylate 2 parts by weight Butyl methacrylate 2 parts by weight Cyclohexyl acrylate 3 parts by weight C: Multifunctional acrylic monomer 10 Weight part Aronix M-300 (manufactured by Toagosei Chemical Industry Co., Ltd.)
D: Photopolymerization initiator 0.5 part by weight Irgacure 907 (manufactured by Ciba Specialty Chemicals)
E: 120 parts by weight of organic solvent
[Preparation of Photosensitive Solventless Light Scattering Color Filter Adhesive] Adhesives were prepared in the following composition: 40 g of glycidyl methacrylate (GMA), 60 g of methyl methacrylate (MMA) and 200 g of acetone in a nitrogen atmosphere. 2.2′-Azobis (2,4-dimethylvaleronitrile (ADVA) was used to obtain a polymer having a molecular weight of 20 × 10 ³ , and 20 g of acrylic acid and 0.2 g of benzyldimethylamine were added to the polymer solution for reaction. Thereafter, 25 g of tetrahydrophthalic anhydride was added and reacted, precipitated and precipitated with cyclohexane, and dried to obtain 130 g of a white powder having a molecular weight of 35 × 10 ³ and an acid value of 100.
[0036]
50 g of this resin, 50 g of trimethylolpropane trimethacrylate (TMP3A), 40 g of hydroxyethyl methacrylate, 40 g of 1,6-hexanediol dimethacrylate, 10 g of biscoat # 2000 (manufactured by Osaka Organic Chemical), 10 g of 1-hydroxycyclohexyl phenyl ketone, 0 of methoquinone 0.1 g, glycidkispropyltrimethoxysilane 10 g, and bisphenol A diglycidyl ether 15 g were added and dissolved.
This resin was mixed with 40 g of Tospearl 120 (manufactured by GE Toshiba Silicon Co., Ltd.) to obtain a photosensitive solventless light scattering adhesive for color filters.
[0037]
[Create transfer color filter]
On the transfer sheet, the photosensitive solventless light scattering adhesive for color filter was dropped. Immediately after the dropping, the adhesive surface of the glass substrate is put on the dropped adhesive and pressed with a roll press machine at a pressure of 9.8 × 10-1 to 49 × 10-1 mPa to uniformly transfer the adhesive. And a glass substrate.
[0038]
Next, from the back side of the glass substrate, the adhesive is cured by irradiating UV rays at 200 mJ / cm 2 through a photomask that shields the area other than the color filter layer and the light shielding layer to be transferred, and peeled off from the metal base plate of the transfer substrate. The layers were peeled together. Then, the protruding adhesive was removed using an alkaline aqueous solution. Subsequently, post-baking was performed to obtain a transfer type color filter in which the color filter layer and the light-shielding layer were transferred onto the glass substrate with an adhesive for light filter having light scattering properties.
[0039]
The composition of the alkaline aqueous solution used is based on the following formulation.
NaCO3 5 parts by weight NaOH 1 part by weight H2O 200 parts by weight
【The invention's effect】
The present invention relates to a photosensitive solvent-free resin composition mainly composed of an acrylic copolymer having an ethylenically unsaturated group and a carboxyl group, a dilution monomer, a photosensitizer, and transparent particles. Because it is an adhesive for color filters that has light scattering properties used for manufacturing, it manufactures transfer type color filters with light scattering properties with the same number of manufacturing steps as ordinary transfer type color filters and almost no increase in manufacturing cost. It is possible to do.
Therefore, by adopting a transfer type color filter manufactured using this adhesive, in a reflective liquid crystal display device, a light scattering film that scatters incident light is obtained in order to obtain a viewing angle at which the screen can be viewed brightly. It is possible to inexpensively manufacture a reflective liquid crystal display device having an appropriate viewing angle without using or forming irregularities on the surface of the reflective electrode.
[0041]
In addition, in the transfer type color filter manufactured using this adhesive, the surface layer of the color filter changes because the adhesive layer having light scattering properties is located between the color filter layer and the transparent substrate. Since it has high smoothness, the subsequent steps can be processed in the same manner as in the conventional methods.
[0042]
Further, in the production of the transfer type color filter, it is not necessary to use an organic solvent because the excess adhesive around the transfer sheet can be removed by liquid phase treatment with an alkaline aqueous solution. Therefore, the influence of organic solvents on work safety, health, and environment is eliminated.
In addition, since the transfer sheet and the transparent substrate coated with the adhesive can be pressed and pressed at room temperature without heating, there is no dimensional difference between the transfer substrate of the transfer sheet and the transparent substrate due to heating. Become.
[Brief description of the drawings]
FIG. 1 is an explanatory view schematically showing an example of a structure of a reflective liquid crystal display device that has been put into practical use.
FIG. 2 is an explanatory view schematically showing an example of a structure of a reflective liquid crystal display device that has been put into practical use.
FIGS. 3A to 3F are explanatory views of a process for manufacturing a transfer type color filter using the color filter adhesive having light scattering properties according to the present invention. FIGS.
[Explanation of symbols]
11. Light scattering films 12, 19, 22, 29, 36 ... Transparent substrates 13, 23 ... Color filters 14, 24 ... Transparent electrodes 15, 25 ... Liquid crystals 16, 21 ... Reflective electrode plates 17, 26 …… Observer-side electrode substrates 18, 27 ...... Back-side electrode substrate 31 ...... Transfer base material 32 ...... Peeling layer 33 ...... Light-shielding layer 34 ...... Color filter layer 35 ...... Adhesion having light scattering properties according to the present invention Adhesive 35 ′ …… Extruded adhesive 35 ′ ′ …… Adhesive layer 37 …… Transfer sheet 40 …… Pressing 50 …… Light irradiation 60 …… Photomask R …… Red pixel (red color filter layer)
G: Green pixel (green color filter layer)
B: Blue pixel (blue color filter layer)

Claims (9)

After the color filter layer transfer sheet and the transparent substrate formed by close contact via an adhesive, the adhesive is cured, in the manufacturing method of the transfer type color filter for separating the transfer sheet, wherein the adhesive resin, diluted A photosensitive solvent-free resin composition mainly composed of a monomer, a photosensitizer, and transparent particles, the resin being an acrylic copolymer having an ethylenically unsaturated group and a carboxyl group, and light scattering A method for producing a transfer type color filter characterized by having a property. The acrylic copolymer is an acrylic copolymer having a molecular weight of 1,000 to 100,000, a double bond equivalent of 3 × 10 ³ or less, and a carboxyl group having a resin acid value of 50 to 150. A method for producing a transfer type color filter according to Item 1 . Method for producing a transfer type color filter according to any one of claims 1 to 2, characterized in that it contains at least 5 wt% or more thermosetting components to the acrylic copolymer. Method for producing a transfer-type color filter according to claim 1, wherein the boiling point of said diluent monomer is 200 ° C. or higher. A photocured adhesive is a layer comprising a transparent resin having a first refractive index and a plurality of the transparent particles dispersed in the transparent resin and having a second refractive index, the first and first The ratio of the other refractive index to the other is from 1.00 to 1.08, and the surface of the plurality of transparent particles is smooth, and the smooth surface is either a convex surface or a combination of a convex surface and a flat surface. whereas the production method of the transfer type color filter according to any one of claims 1 to 4, characterized in that is. At least a portion, respectively, the manufacturing method of the transfer type color filter according to any one of claims 1 to 5, characterized in that it has a symmetry center of the plurality of transparent particles. 2. The transparent particle having a center of symmetry has a spherical shape, a spheroid shape having a minor axis of an ellipse as a rotation axis, or a disk shape, respectively. The manufacturing method of the transfer type color filter in any one of thru | or 6 . The method for producing a transfer type color filter according to any one of claims 1 to 7 , wherein each of the plurality of transparent particles is composed of either a resin or an inorganic compound. The method for producing a transfer type color filter according to any one of claims 1 to 8 , wherein each of the plurality of transparent particles is made of an optically isotropic material.

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