Photosensitive colored resin composition and color filter and display device using the same

Abstract

Photosensitive colored resin composition and color filter and display device using the same. The photosensitive colored resin composition includes a solid composition part and a solvent. The solid composition part includes a colorant, an alkali-soluble resin, a polymerizable unsaturated compound, a photopolymerization initiator and scattering particles. The scattering particles in the solid composition part have a scattering area ratio α. #imgabs0#d is the average particle size of the scattering particles, in nm. #imgabs1# is the sphericity of the scattering particles. R is the roundness of the scattering particles. C is the weight percentage of the scattering particles in the solid composition part. 60nm <d<250nm。500<α<3000。

Description

Technical Field

[0001] The invention relates to a photosensitive colored resin composition and a color filter and a display device using the same. Background Art

[0002] In display devices, color filter structures such as color filters are commonly used to control the color of each pixel. The color filter may include a plurality of color photoresist structures, such as but not limited to red, green, and blue photoresist structures. These photoresist structures may be formed using a resin composition, particularly a photosensitive resin composition. In general, the composition of the photosensitive resin composition may be adjusted and optimized to suit various types of display applications.

[0003] In order to improve color purity, light emitting diode (OLED) display devices use microcavity and other technical means to reduce the color bandwidth (color spectrum width) to improve color purity. However, this method will cause the viewing angle range of the display device to be narrow, that is, when the human eye is viewed at a larger viewing angle, the display image will have a significant difference that the human eye can discern compared to when it is viewed at a normal viewing angle. Therefore, this is a technical problem that the industry is eager to improve. Summary of the invention

[0004] The invention relates to a photosensitive colored resin composition and a color filter and a display device using the same.

[0005] According to one aspect of the present invention, a photosensitive colored resin composition is provided, which includes a solid composition part and a solvent. The solid composition part includes a colorant, an alkali-soluble resin, a polymerizable unsaturated compound, a photopolymerization initiator, and scattering particles. The scattering particles in the solid composition part have a scattering area ratio α.

[0006]

[0007] d is the average particle size of the scattering particles, in nm. is the sphericity of the scattering particles. R is the roundness of the scattering particles. C is the weight percentage of the scattering particles in the solid composition. 60nm <d<250nm。500<α<3000。

[0008] According to another aspect of the present invention, a color filter is provided, which is formed by the above-mentioned photosensitive colored resin composition.

[0009] According to yet another aspect of the present invention, a display device is provided, comprising the above-mentioned color filter.

[0010] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 shows a method for evaluating the viewing angle luminance.

[0012] Among them, the reference numerals are as follows:

[0013] 102: Color filter

[0014] 104: Organic light-emitting diode light emitter

[0015] 106: Rotating stage

[0016] 108: Color measurement device Detailed implementation manners

[0017] The following specifically describes the structural principle and working principle of the present invention with reference to the accompanying drawings:

[0018] The present disclosure provides a photosensitive color resin composition, a color filter, and a display device using the same. The photosensitive color resin composition has substantially homogeneous characteristics required by the industry, and the color filter and the display device using the photosensitive color resin composition can exhibit excellent characteristics of front-view luminance and viewing angle luminance.

[0019] In an embodiment, the photosensitive color resin composition includes a solid composition part and a solvent.

[0020] In an embodiment, the solid composition part may include scattering particles, a colorant, an alkali-soluble resin, a polymerizable unsaturated compound, and a photoinitiator.

[0021] In the solid composition part, the scattering particles have a scattering area ratio α, which is represented by the following equation:

[0022]

[0023] In Equation <1>, d is the average particle diameter of the scattering particles, and the unit is nm. In an embodiment, 60 nm < d < 250 nm. If the particle diameter of the scattering particles is too small, sufficient scattering effect cannot be provided, resulting in insignificant improvement in the viewing angle luminance of the display device. If the particle diameter of the scattering particles is too large, excessive shielding effect will be caused, resulting in large loss of front-view luminance of the display device. Moreover, the sedimentation property of the scattering particles in the photosensitive color resin composition is significant, making the photosensitive color resin composition not industrially utilizable.

[0024] is the sphericity of the scattering particles. R is the roundness of the scattering particles. In an embodiment, the maximum length (MXL), the average particle projection perimeter (PERI), and the average particle projection area (AREA) of the scattering particles can be obtained by image analysis, and the roundness R and the sphericity can be calculated by the following equation

[0025]

[0026] The closer the roundness R is to 1, the smoother the surface of the scattering particles is. For example, the roundness R may be 0.8-1.

[0027] Sphericity The closer it is to 1, the closer the scattering particles are to a perfect sphere, which provides a better scattering effect. It can be 0.8 to 1. If the sphericity If the size is too small, the scattering effect of the scattering particles on light is not obvious, and the viewing angle brightness of the display device cannot be improved.

[0028] Sphericity The roundness R can represent the morphology of the scattering particles.

[0029] equation <1> C is the weight percentage of the scattering particles in the solid composition. In the embodiment, the scattering particles account for 0.5-10% by weight of the solid composition. If the content of the scattering particles is too little, it will not provide sufficient scattering effect, so that the improvement of the viewing angle brightness of the display device is not obvious. If the content of the scattering particles is too much, it will cause excessive shielding effect, resulting in a large loss of brightness at the normal viewing angle of the display device.

[0030] In the embodiment, 500<α<3000. If the scattering area ratio α of the scattering particles is less than 500, the surface area of ​​the scattering particles will be too small to cause sufficient light scattering effect. If the scattering area ratio α of the scattering particles is greater than 3000, the volume of the scattering particles is too large, resulting in excessive light shielding effect and insufficient light scattering efficiency.

[0031] The scattering particles include metal oxide particles, such as titanium dioxide particles, which can be used as titanium white pigment.

[0032] The colorant is soluble or dispersible in a solvent and is not particularly limited. Examples of the colorant include dyes and pigments.

[0033] The pigment of the colorant may include red pigment, yellow pigment, green pigment, blue pigment, purple pigment, etc. The red pigment may include CI Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 175, 176, 177, 180, 192, 209, 215, 216, 224, 242, 254, 255, 264, 265. The yellow pigment may include CI Pigment Yellow, and CI Pigment Yellow may include CI Pigment Yellow 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 128, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173, 194, 214. Examples of green pigments include CI Pigment Green 1, 2, 4, 7, 8, 10, 13, 14, 15, 17, 18, 19, 26, 36, 45, 48, 50, 51, 54, 55, and 58. Examples of blue pigments include CI Pigment Blue 1, 1:2, 9, 14, 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 17, 19, 25, 27, 28, 29, 33, 35, 36, 56, 56:1, 60, 61, 61:1, 62, 63, 66, 67, 68, 71, 72, 73, 74, 75, 76, 78, and 79. Examples of the violet pigment include CI Pigment Violet 1, 1:1, 2, 2:2, 3, 3:1, 3:3, 5, 5:1, 14, 15, 16, 19, 23, 25, 27, 29, 31, 32, 37, 39, 42, 44, 47, 49, and 50.

[0034] Examples of dyes of the coloring agent include oil-soluble dyes, acid dyes, basic dyes, direct dyes, mordant dyes, amine salts of acid dyes, and sulfonamide derivatives of acid dyes. Examples of dyes include azo dyes, cyanine dyes, triphenylmethane dyes, xanthenedye dyes, phthalocyanine dyes, naphthoquinone dyes, quinoneimine dyes, methine dyes, azomethine dyes, squarylium dyes, acridine dyes, styryl dyes, coumarin dyes, quinoline dyes, and nitro dyes.

[0035] In the embodiment, the colorant may account for 20 to 40% by weight based on the total weight of the solid composition.

[0036] The alkali-soluble resin is a resin soluble in an alkaline solvent and may contain an acidic functional group, such as an unsaturated monomer containing a carboxylic acid group. The alkali-soluble resin may include, for example, acrylic compounds having an acidic functional group, α-olefin-maleic anhydride copolymer, styrene-maleic anhydride copolymer, styrene-styrene sulfonic acid copolymer, ethylene-methacrylic acid copolymer, isobutylene-maleic anhydride copolymer, and / or having a chemical formula <2> Acrylate copolymer.

[0037]

[0038] With chemical formula <2> The molecular weight (Mw) of the acrylic copolymer may be 1000-20000. a:b:c:d may be 15:5-25:30-50:20-40. In one embodiment, the molecular weight (Mw) of the acrylic copolymer is about 10000, and the ratio of a:b:c:d is 15:15:40:30. However, the present disclosure is not limited thereto.

[0039] In the examples, the alkali-soluble resin accounts for 10 to 40% by weight based on the total weight of the solid composition.

[0040] The polymerizable unsaturated compound may be, for example, a compound having an ethylenically unsaturated double bond, such as trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol polyacrylate, Polyacrylate), pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol octa(meth)acrylate, tripentaerythritol hepta(meth)acrylate, four-season pentaerythritol deca(meth)acrylate, four-season pentaerythritol nona(meth)acrylate, tris(2-(meth)acryloyloxyethyl)isocyanurate, ethylene glycol-modified pentaerythritol tetra(meth)acrylate, ethylene glycol-modified dipentaerythritol hexa(meth)acrylate, propylene glycol-modified pentaerythritol tetra(meth)acrylate, propylene glycol-modified dipentaerythritol hexa(meth)acrylate, caprolactone-modified pentaerythritol tetra(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate, etc., or a combination thereof.

[0041] In the embodiment, based on the total weight of the solid composition, the polymerizable unsaturated compound may account for more than 15 weight % and less than 45 weight %.

[0042] The photopolymerization initiator may include, but is not limited to, at least one selected from the group consisting of the following options: O-acyloxime compounds, thioxanthone compounds, alkylphenyl ketone compounds, bisimidazole compounds, triazine compounds, acylphosphine oxides, benzoin compounds, diphenyl ketone compounds, quinone compounds, 10-butyl-2-chloroacridone, benzyl, methyl phenylformate, acetophenone, titanium cyclopentadiene compounds, acylphosphine oxide compounds, and bisimidazole compounds. The O-acyloxime compound may include 1,2-octanedione-1-[4-(phenylthio)phenyl]-2-(O-benzoyloxime) (product name: Thioxanthone compounds may include commercially available products such as 2,4-diethylthioxanthenone (2,4-Diethyl-9H-thioxanthen-9-one) (trade name KAYACURE-DETX, manufactured by Nippon Kayaku Co., Ltd.).

[0043] In the embodiment, the photopolymerization initiator may account for 4 to 10 weight % based on the total weight of the solid composition.

[0044] In an embodiment, the solid composition may further include additives, such as curing agents, surfactants, adhesion promoters, antioxidants, anti-coagulation agents, dispersants (such as pigment dispersants), etc., or combinations thereof.

[0045] In an embodiment, based on the total weight of the solid composition, the additive may account for more than 0.5 weight % and less than 20 weight %.

[0046] The solvent may include dimethyl sulfoxide (DMSO), diethyl sulfoxide, N,N-dimethylformamide (DMF), N,N-diethylformamide, N,N-dimethylacetamide (DMAc), N,N-diethylacetamide, N-methyl-2-pyrrolidone (NMP), N-ethyl-2-pyrrolidone (NEP), N-propyl-2-pyrrolidone (NMP), N-propyl-2-pyrrolidone (NEP), N-propyl-2-pyrrolidone (NEP), N-propyl-2-pyrrolidone (NMP), N-ethyl-2-pyrrolidone (NEP), N-propyl-2-pyrrolidone (NMP), N-methyl ...methyl-2-pyrrolidone (NMP), N-ethyl-2-pyrrolidone (NEP), N-propyl-2-pyrrolidone (NMP), N-methyl-2-pyrrolidone (NMP), N-methyl-2-pyrrolidone (NMP), N-ethyl-2-pyrrolidone (NMP), N-propyl-2-pyrrolidone (NMP), N-methyl-2-pyrrolidone (NMP), N-methyl-2-pyrrolidone (N The solvents include but are not limited to propylene glycol, propylene glycol methyl ether (PGME), propylene glycol dimethyl ether (TGDE), butyl cellosolve, γ-butyrolactone (GBL), xylene, toluene, hexamethylol ether amide, propylene glycol methyl ether acetate (PGMEA), or mixtures thereof, or other suitable solvents.

[0047] The photosensitive colored resin composition disclosed herein can form a color filter. For example, the photosensitive colored resin composition can be formed into a color filter by photolithography, inkjet, printing, knife coating, slit coating, spin coating, etc. The color filter can also be patterned using a lithography process.

[0048] The color filter can be applied to a display device, which can be an organic light emitting diode display device, a liquid crystal display device, an electroluminescent display device, a plasma display device, and the like.

[0049] Hereinafter, the present disclosure will provide several embodiments and comparative examples to more specifically illustrate the effects that can be achieved by the photosensitive colored resin composition according to the embodiments of the present disclosure.

[0050] [Pigment dispersion of photosensitive colored resin composition]

[0051] [Pigment dispersion A-1]

[0052] 13.0 parts by weight of CI Pigment Red 254, 8.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 79.0 parts by weight of solvent PGMEA were mixed and appropriately dispersed for 16 hours to prepare CI Pigment Red 254 dispersion A-1.

[0053] [Pigment dispersion A-2]

[0054] 13.0 parts by weight of CI Pigment Red 177, 8.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 79.0 parts by weight of solvent PGMEA were mixed and appropriately dispersed for 16 hours to prepare CI Pigment Red 177 dispersion A-2.

[0055] [Pigment dispersion A-3]

[0056] 13.0 parts by weight of CI Pigment Yellow 150, 9.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 78.0 parts by weight of solvent PGMEA were mixed and appropriately dispersed for 16 hours to prepare CI Pigment Yellow 150 dispersion A-3.

[0057] Table 1 shows the colorants used in the pigment dispersion

[0058] Table 1

[0059] Pigment dispersion Colorants A-1 CI Pigment Red 254 A-2 CI Pigment Red 177 A-3 CI Pigment Yellow 150

[0060] [Scattering particle dispersion of photosensitive colored resin composition]

[0061] [Scattering particle dispersion F-1]

[0062] 30.0 parts by weight of titanium dioxide scattering particles having an average particle size of 92 nm, 5.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 65.0 parts by weight of solvent PGMEA (Shangren Chemical Co., Ltd.) were mixed and appropriately dispersed for 12 hours to prepare scattering particle dispersion F-1.

[0063] [Scattering particle dispersion F-2]

[0064] 30.0 parts by weight of titanium dioxide scattering particles having an average particle size of 114 nm, 5.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 65.0 parts by weight of solvent PGMEA (Shangren Chemical Co., Ltd.) were mixed and dispersed for 12 hours to prepare scattering particle dispersion F-2.

[0065] [Scattering particle dispersion F-3]

[0066] 30.0 parts by weight of titanium dioxide scattering particles having an average particle size of 49 nm, 5.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 65.0 parts by weight of solvent PGMEA (Shangren Chemical Co., Ltd.) were mixed and appropriately dispersed for 12 hours to prepare scattering particle dispersion F-3.

[0067] [Scattering particle dispersion F-4]

[0068] 70.0 parts by weight of titanium dioxide scattering particles having an average particle size of 257 nm, 6.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 24.0 parts by weight of solvent PGMEA (Shangren Chemical Co., Ltd.) were mixed and appropriately dispersed for 12 hours to prepare scattering particle dispersion F-4.

[0069] [Scattering particle dispersion F-5]

[0070] 30.0 parts by weight of titanium dioxide scattering particles having an average particle size of 108 nm, 5.0 parts by weight of dispersant LPN6919 (manufactured by BYK), and 65.0 parts by weight of solvent PGMEA (Shangren Chemical Co., Ltd.) were mixed and dispersed for 6 hours to prepare scattering particle dispersion F-5.

[0071] Table 2 shows the average particle size d, roundness R and sphericity of the scattering particles in the scattering particle dispersion.

[0072] Table 2

[0073] Scattering particle dispersion Average particle size Roundness R Sphericity φ F-1 92nm 0.9 0.9 F-2 114nm 0.7 0.9 F-3 49nm 0.9 0.9 F-4 257nm 0.7 0.7 F-5 108nm 0.9 0.3

[0074] [Alkali-soluble resin, polymerizable unsaturated compound, photopolymerization initiator of photosensitive coloring resin composition]

[0075] The alkali-soluble resin used has the chemical formula <2> An acrylate copolymer having a weight molecular weight (Mw) of approximately 10,000 and a:b:c:d of 15:15:40:30.

[0076]

[0077] As the polymerizable unsaturated compound, pentaerythritol polyacrylate (Shin-Nakamura Chemical Industry Co., Ltd.) was used.

[0078] Use of photopolymerization initiator OXE-01 (BASF), KAYACURE-DETX.

[0079] [Preparation of Photosensitive Colored Resin Composition]

[0080] Table 3 (Examples 1 to 8) and Table 4 (Comparative Examples 1 to 6) show the photosensitive color resin composition including (1) the type of pigment dispersion and the solid content of the pigment, (2) the solid content of the alkali-soluble resin, (3) the solid content of the polymerizable unsaturated compound, (4) the type of photopolymerization initiator and the solid content, (5) the type of scattering particle dispersion and the solid content of the scattering particles, and (6) the total solid content of additives (i.e., the dispersant of the pigment dispersion and the dispersant of the scattering particle dispersion).

[0081] [Evaluation of Sedimentation of Photosensitive Colored Resin Composition]

[0082] Use a round-bottom centrifuge tube with a diameter of 17.1 mm and a length of 120 mm, fill it with a volume of 10 ml of the photosensitive colored resin composition, tighten the upper cover and let it stand upright for 168 hours. After standing for 168 hours, aspirate 5 ml of the upper layer of the photosensitive colored resin composition (referred to as the upper layer), and then aspirate 5 ml of the lower layer of the photosensitive colored resin composition (referred to as the lower layer). The upper and lower layers are placed in aluminum plates and baked at 110 degrees Celsius for 3 hours. The weight difference before and after baking is measured, and the content of the solid component part other than the volatile solvent is calculated, which is called the solid content. The sedimentation evaluation is obtained by calculating the sedimentation ratio. The calculation formula is as follows: <3> :

[0083] Sedimentation = upper layer solid content / lower layer solid content * 100% formula <3>

[0084] The results and evaluation of sedimentation are shown in Tables 3 and 4. When the sedimentation is greater than 90%, it is evaluated as "O", indicating that the sedimentation phenomenon of the solid component of the photosensitive color resin composition is not significant, and the photosensitive color resin composition is substantially homogeneous and suitable for forming a color filter of a display device. When the sedimentation is less than 90%, it is evaluated as X, indicating that the sedimentation phenomenon (or delamination phenomenon) of the solid component of the photosensitive color resin composition is too significant and cannot be used.

[0085] [Preparation of color filters]

[0086] The photosensitive colored resin compositions of Examples 1 to 8 and Comparative Examples 1 to 6 were applied to a 5 cm 2 The glass substrate was then dried under reduced pressure and placed on a 90°C hot plate for 40 seconds to evaporate the solvent. The coating surface was then irradiated with 30 mJ / cm 2The energy rays form a square solidified film with a size of 15mm x 15mm on the film surface. Then the development process is carried out. Finally, the film is baked at a temperature of 230°C and a baking time of 20 minutes to obtain a solidified color filter with a film thickness of 2.4 microns and a micron-level fine pattern.

[0087] [Brightness evaluation at normal viewing angle]

[0088] The luminance at normal viewing angle is given by the equation <4> Evaluation of luminance loss (Iloss). RY1 represents the luminance value at a normal viewing angle of the color filters of Examples 1 to 8 and Comparative Examples 1 to 6 measured by a spectrophotometer. RY0 represents the luminance value at a normal viewing angle of the color filter of Comparative Example 1 without scattering particles measured by a spectrophotometer.

[0089] Iloss=(RY0-RY1) / RY0*100% <4>

[0090] When I loss ≦10%, it is judged that the brightness loss at the positive viewing angle is not significant, which is indicated by the symbol "O". loss >10%, it is judged that the luminance loss at positive viewing angle is significant, which is indicated by the symbol "X".

[0091] [Viewing angle brightness evaluation]

[0092] Please refer to the method for evaluating the brightness at a viewing angle shown in FIG. 1. The color filter 102 is bonded to the organic light emitting diode (OLED) emitter 104 and placed flat on a rotating stage 106. A colorimetric measuring device 108 (SR-UL1R) is set directly above the colorimetric measuring device 108 to measure the brightness of the light emitted by the OLED emitter 104 after passing through the color filter 102. The brightness measured at the normal viewing angle (0°) is set as I0. The rotating stage 106 is rotated to measure the brightness I at different deviation angles relative to the normal viewing angle. n . When I n When / I0*100%=50%, the deviation angle n is defined as the 50% brightness viewing angle. Taking the 50% brightness viewing angle of the color filter 102 of Comparative Example 1 without using scattering particles as the reference viewing angle, when the 50% brightness viewing angle of the color filter 102 increases by 13° (inclusive) or more, that is, the improved angle is 13° (inclusive) or more, it is determined that the viewing angle improvement effect is significant, which is represented by the symbol "O"; when the 50% brightness viewing angle of the color filter 102 increases by less than 13°, that is, the improved angle is less than 13°, it is determined that the viewing angle improvement effect is not significant, which is represented by the symbol "X".

[0093] Table 3: Examples

[0094]

[0095]

[0096] Table 4: Comparative Examples

[0097]

[0098] According to the above results, it can be found that Examples 1 to 8 are excellent in terms of sedimentation, normal viewing angle luminance, and viewing angle brightness, but the comparative example is not the case.

[0099] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A photosensitive colored resin composition, characterized in that: The invention comprises a solid composition part and a solvent, wherein the solid composition part comprises a colorant, an alkali-soluble resin, a polymerizable unsaturated compound, a photopolymerization initiator and scattering particles, and the scattering particles in the solid composition part have a scattering area ratio α. in, d is the average particle size of the scattering particles, in nm, is the sphericity of the scattering particle, R is the roundness of the scattering particle, C is the weight percentage of the scattering particles in the solid composition, 60nm <d<250nm, 500<α<3000， MXL represents the longest length of the scattering particle, PERI represents the average particle projected perimeter, and AREA represents the average particle projected area; wherein the scattering particles include metal oxides; The scattering particles account for 0.5-10% by weight of the solid composition; Wherein, based on the total weight of the solid composition, the colorant accounts for 20 to 40 weight %, and / or the alkali-soluble resin accounts for 10 to 40 weight %, and / or the polymerizable unsaturated compound accounts for more than 15 weight % and less than 45 weight %, and / or the photopolymerization initiator accounts for 4 to 10 weight %.

2. The photosensitive colored resin composition according to claim 1, wherein The scattering particles include titanium dioxide.

3. The photosensitive colored resin composition according to claim 1, wherein The sphericity of the scattering particles It is 0.8~1.

4. The photosensitive colored resin composition according to claim 1, wherein The roundness R of the scattering particles is 0.8-1.

5. The photosensitive colored resin composition according to claim 1, wherein The solid component further comprises an additive, and based on the total weight of the solid component, the additive accounts for more than 0.5 weight % and less than 20 weight %.

6. The photosensitive colored resin composition according to claim 1, wherein The photosensitive colored resin composition has a sedimentation rate of greater than 90%.

7. A color filter, characterized in that: It is formed from the photosensitive colored resin composition according to any one of claims 1 to 6.

8. The color filter according to claim 7, wherein: The brightness loss of the color filter is loss Less than or equal to 10%.

9. The color filter according to claim 7, wherein: The 50% brightness viewing angle of the color filter is increased by more than 13°.

10. A display device, characterized in that: Comprising the color filter as described in any one of claims 7 to 9.

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