KR20030073256A - Selectively light-absorptive material for color display device, coating composition containing the same and filter manufactured using the coating composition - Google Patents

Abstract

PURPOSE: Provided are a photoselective absorbent for color display, which can block a reflected light of the color display and an emitted light corresponding to neutral tint of three primary colors, and improve the color purity and contrast of the color display, a coating comprising the same, and a filter produced with the coating. CONSTITUTION: The absorbent comprises a dimer of tetraazaporphyrin derivative represented by formula 1. In the formula 1, each of R1, R2, R3, and R4 is independently selected from the group consisting of hydrogen; unsubstituted phenyl group; C1-C8 alkyl group; C1-C8 alkoxy group; nitro group; halogen atom; C1-C8 alkylamine; cyano group; and phenyl group substituted with at least one selected from C1-C8 alkyl group, nitro group, halogen atom, C1-C8 alkylamine group, C1-C8 alkylamino group, C1-C8 aminoalkyl group, and cyano group, or the groups 1-3 of R1 and R2 form aromatic rings of formula 2a-2f together, the rest groups are independently selected from the group consisting of hydrogen; C1-C8 alkyl group; C1-C8 alkoxy group; aryl group; halogen atom; cyano group; and nitro group, and X is O or NH. In the formulas 2a-2f, each of R5, R5', R5", and R5"' is independently selected from the group consisting of hydrogen; C1-C8 alkyl group; C1-C8 alkoxy group; allyl group; halogen atom; cyano group; and nitro group, R6 is C1-C8 alkyl group or allyl group; X1- is anion of halogen atom, or C1-C8 alkyl sulfonate, and dot lines represent a part bonded to pyrrole group of the formula 1.

Description

Selectively light-absorptive material for color display device, coating composition containing the same and filter manufactured using the coating composition

The present invention relates to a light selective light absorber for applying to a surface or a filter of a color display device, a coating agent comprising the same, and a filter made of the coating agent.

In the display device, the viewer's eyes are tired and the contrast is low due to the surface reflection of ambient light. The reflected light is the addition of the external light reflected from the glass surface used as the screen and the light reflected from the light emitter inside the screen has been studied in the art to reduce this. U.S. Patent No. 4,989,953 discloses a study for the reduction of reflected light. One approach to reducing reflected light for color displays is to use a neutral density (ND) filter or an attenuator. The ND filter is a method of improving contrast by transmitting only a portion of light regardless of a wavelength, but is widely used in manufacturing a color CRT display device, but has a problem of reducing screen brightness. Another method is to combine an ND filter and an antireflection coating, which reduces the reflection of external light from the emitter and the reflected light on the surface of the display while causing a decrease in brightness and no improvement in color purity.

Thus, a method of minimizing luminance reduction while simultaneously improving color purity and contrast has been proposed. A method of transmitting light in three primary colors emitted from a display device and blocking light in the remaining areas has been proposed. Unlike the ND filter, this method allows the light emitted from the display device to be sufficiently transmitted while sufficiently reducing external light, thereby minimizing the reduction in luminance compared to the effect of increasing contrast, and at the same time improving the color purity of the display device, thereby greatly increasing the range of color implementation. It has the advantage of being extensible.

U.S. Patent Nos. 4,288,250, 4,520,115 and 4,245,242 have applied colored glass containing metal oxides, including neodium oxide, as a front material for cathode ray tubes or used as filters. This method has the advantage of reducing the luminance of the display device and at the same time lowering the reflectance of the external light and improving the color purity, but it is disadvantageous in that the manufacturing process of the colored glass is complicated and the manufacturing cost is high.

In addition, Japanese Patent Publication No. 44-5091, Japanese Patent Publication No. 59-217705, Hei 4-106150, Hei 6-88007 and Hei 10-120860 disclose a colored plastic obtained by dispersing or dissolving a neodium oxide or an organic neodium compound in a plastic. Although it has been intended to improve the characteristics of the color display device, they have a disadvantage in that the characteristics are gradually deteriorated due to the difficulty of dispersion or dissolution and yellowing of the plastic material.

Japanese Patent Laid-Open No. Hei 2-210486 and U.S. Patent No. 5,200,667 propose a color display device filter mainly composed of a pigment and a plastic resin material, but this contributes to the improvement of color purity due to the wide absorption width of the pigment and the small light selectivity. Although US Patent No. 5,834,122 proposes a band pass filter for display devices with improved color selectivity, there is a problem in that a light absorbing dye between green and red or between blue and green is insufficient in practical use.

Plasma display panel (PDP) encapsulates and seals an inert gas such as helium, neon, argon, xenon, or a mixed gas thereof in a partition surrounded by glass, and then applies a high voltage to ionize the gas to form a plasma. The ultraviolet rays emitted here excite the phosphors and emit light. PDPs can be secured with a wide viewing angle, are easier to be enlarged than other display devices, and are considered to have the most suitable characteristics as high-quality televisions of the PDP in the future as thin-type light emitting display devices.

However, PDP has a disadvantage in that the luminance is lower than that of CRT and the surface reflection of the phosphor is not only high, but also the color purity does not reach the cathode ray tube due to the orange light emitted from the encapsulated gas helium. FIG. 1 shows the emission spectrum of the plasma display panel, which has a strong emission peak near 590 nm in red when compared with the emission spectrum of the CRT of FIG. 2, due to the inclusion gas, neon. Therefore, the red color is difficult to implement. Considering the various uses and potential uses of the PDP, it is very urgent to develop a device or a mechanism that lowers the reflection on the surface of the display and improves the overall color purity and contrast without serious loss of screen brightness and sharpness.

Accordingly, the inventors of the present invention have developed a light absorber capable of absorbing light between green and red and between red and infrared and excellent heat resistance, and applying the same to a filter for a color display device. The present invention has been completed by discovering that the color purity and contrast of a color display device can be economically improved.

Accordingly, an aspect of the present invention is to provide a light selective light absorber for a color display device that can improve color purity and contrast of a color display device by blocking reflected light of the color display device and emission light corresponding to the intermediate color of the three primary colors. will be.

Another object of the present invention is to provide a photoselective absorbent coating comprising the photoselective light absorber.

Another technical problem to be achieved by the present invention is to provide a photoselective absorbent filter comprising the photoselective absorbent coating agent.

1 shows a typical emission spectrum of a cathode ray tube,

2 shows the emission spectrum of the plasma display panel,

Figure 3 shows the absorption spectrum of the dimer of the tetraazapopyrine derivative prepared in Synthesis Example 1 of the present invention,

4 shows the transmission spectrum of each colored glass filter obtained in Example 1 and Comparative Example 1 of the present invention,

5 shows the transmission spectrum after the heat exposure of each colored glass filter obtained in Example 1 and Comparative Example 2 of the present invention,

Fig. 6 shows the transmission spectrum after light exposure of each colored glass filter obtained in Example 1 and Comparative Example 3 of the present invention.

In order to achieve the first technical problem, the present invention provides a light selective light absorber for a color display device comprising a dimer of a tetraazapopyrine derivative of the general formula (1).

(Wherein R ₁ , R ₂ , R ₃ and R ₄ are each independently

Hydrogen;

Unsubstituted phenyl group;

Alkyl groups having 1 to 8 carbon atoms;

An alkoxy group having 1 to 8 carbon atoms;

Nitro group;

Halogen atom;

Alkylamines having 1 to 8 carbon atoms;

Cyano group; And

A phenyl group substituted with at least one selected from an alkyl group having 1 to 8 carbon atoms, a nitro group, a halogen atom, an alkylamino group having 1 to 8 carbon atoms, an aminoalkyl group having 1 to 8 carbon atoms, and a cyano group;

Or R ₁ and R ₂ in one to three groups in the above formula are fused to each other to form an aromatic ring of Formula 2a to Formula 2f, and the remaining groups are each independently

Hydrogen;

Alkyl groups having 1 to 8 carbon atoms;

An alkoxy group having 1 to 8 carbon atoms;

Allyl group;

Halogen atom;

Cyano group; And

Selected from the group consisting of nitro groups,

X represents O or NH,

The above _{formula, R 5, R 5 ',} R 5 " and R _5' '' they are, each independently

Hydrogen;

Alkyl groups having 1 to 8 carbon atoms;

C1-C8 alkoxy group;

Allyl group;

Halogen atom;

Cyano group; And

Selected from the group consisting of nitro groups,

R ₆ is an alkyl group or an allyl group having 1 to 8 carbon atoms,

X ₁ ^- represents an anion of a halogen element or an alkyl sulfonate having 1 to 8 carbon atoms, and a dotted line portion represents a portion bonded to the pyrrole group of Chemical Formula 1 above.)

The second technical problem of the present invention is achieved by the photoselective absorbent coating for color display device comprising the above-described photoselective light absorber, plastic resin and organic solvent.

A third technical problem of the present invention is achieved by a light selective absorbing filter for a color display device, comprising a light selective light absorber and a plastic resin.

Hereinafter, the present invention will be described in more detail.

In general, in order to improve color purity and contrast of a color display device, a light absorber capable of selectively absorbing light between blue and green and red and green is required. In particular, a light absorber capable of selectively absorbing light between red and green may be required. A light absorber is required.

The dimer of the tetraazapophyrin derivative of Chemical Formula 1 according to the present invention has a strong absorption band in the 580 to 610 nm region and the 660 to 690 nm region, as described in the absorption spectrum of FIG. The width is about 30 nm. As such, the dimer of the tetraazapophyrin derivative of Formula 1 according to the present invention absorbs light between red and green and between red and infrared rays and thus has excellent light selective absorbance required by the optical filter for color display devices.

The dimer of the tetraazapophyrin derivative of the general formula (1) according to the present invention has a property of effectively absorbing light especially between red and green and between red and infrared rays, thereby greatly improving color purity and contrast of a color display device, and excellent heat resistance and Since it shows light resistance, it can be used for a long time in an image display device such as a cathode ray tube and a plasma display panel.

<Formula 1>

Wherein R ₁ , R ₂ , R ₃ , R ₄ and X are as defined above.

It is particularly preferable that the dimer of the tetraazapophyrin derivative of Chemical Formula 1 is a compound of Chemical Formula 3 below.

The photoselective light absorber according to the present invention may be prepared by dissolving in an organic solvent together with a plastic resin and preparing a coating agent. The content of the photoselective light absorber in the coating agent is 0.05 to 1% by weight based on the solid content of the coating agent. At this time, if the content of the light selective light absorber is less than 0.05% by weight, it is not preferable to implement the required light absorbing properties, and if it exceeds 1% by weight, the physical properties of the coating agent are lowered.

In the light selective absorbent coating agent of the present invention, it is preferable to use a transparent plastic resin such as polymethyl (meth) acrylate, polyvinyl alcohol, polycarbonate, polyethylene terephthalate, ethylene vinyl acetate and polyvinyl butyral. Preferably, the content is 5 to 40% by weight based on the total weight of the organic solvent. If the content of the transparent plastic resin is less than 5% by weight it is difficult to secure the thickness for implementing the required physical properties, if the content exceeds 40% by weight is not preferable because the coating properties are lowered.

In the photoselective absorbent coating agent of the present invention, the organic solvent is toluene, xylene, propyl alcohol, isopropyl alcohol, dimethylformamide, cyclohexanone, cyclopentanone, tetrahydrofuran, dichloromethane, chloroform, methylcellulsolve , Ethyl cellosolve, dimethylformamide and the like can be used.

In the photoselective absorbent coating of the present invention, azo dyes, cyanine dyes, diphenylmethane dyes, triphenylmethane dyes, phthalocyanine dyes, and xanthene dyes are used to control the transmittance of each wavelength region of the color display device or to realize whiteness. , Diphenylene dyes, dyes such as indigo or porphyrin can be further added. At this time, the content of the dye is preferably 0.05 to 3% by weight based on the total weight of the total solid content of the coating agent. If the content of the dye is less than 0.05% by weight is insufficient implementation of the required light absorption characteristics, if the content of more than 3% by weight is not preferable because the physical properties of the coating is lowered.

In the coating agent of the present invention, it is preferable to further add a sunscreen agent to block ultraviolet rays reflected from a color display device, in particular, a plasma display panel, and the sunscreen agent includes HALS (TINUVIN928 (manufactured by CIVA Specialty Co., Ltd.)). Amine Light Stabilizer) series, absorbents such as phenyl salicylate, benzophenone, benzotriazole or nickel derivative quencher or the like is preferably used alone or in combination.

In the coating agent of the present invention, it is preferable to further add an infrared ray blocking agent to block infrared rays (especially near infrared rays) reflected from a color display device, in particular, a plasma display panel. Such infrared ray blocking agents are represented by the following Chemical Formulas 4, 5 and 6 The compound which becomes, etc. can be used. The compound represented by the following formula (4) shows the structure of diimnium, and for example, trade name IRG022 (manufactured by Nippon Kayaku Co., Ltd.). The compounds represented by the following formulas (5) and (6) show the structure of the dithiolate, and examples thereof include trade names SIR128, SIR130, SIR132, and SIR159 (Mitsui Chemical Co., Ltd.).

In Formula 4, R 'is an alkyl group having 1 to 6 carbon atoms, Y is ^{_{ClO 4 -, Ab 2 F 6}} -, BF 3 -, toluene represents a sulfonate or sulfonate anion.

In Formula 5, M is Ni, Pd or Pt, and R ″ represents hydrogen or an alkyl or alkoxy group having 1 to 10 carbon atoms; phenyl substituted with a halogen atom or an alkylamine; or a phenyl group.

In Formula 6, M 'is Fe, Ni, Cu, Co or Pt, R''' is hydrogen; Alkyl or alkoxy groups having 1 to 10 carbon atoms; Halogen atom; Or a nitro group, and Q ⁺ is a tetraalkylammonium cation (wherein the alkyl group has 1 to 6 carbon atoms).

In addition, a stabilizer may be further added to the light selective absorbent coating agent of the present invention to improve light resistance. Stabilizers that can be used include radical reaction inhibitors that prevent the fading of pigments that can be used conventionally.

The photo-selective absorbent coating of the present invention may be used by coating the glass, plastic or plastic film to be mounted on the display device, or by directly coating the surface of the display device, and such coating may be performed using conventional methods. It may be performed by, for example, spin coating or roll coating. The photo-selective absorbent coating agent of the present invention is preferably coated with a thickness of 1 to 20㎛. If the coating film thickness of the photoselective absorbent coating agent is less than 1 μm, the desired absorption characteristics are insufficient. If the thickness is greater than 20 μm, the coating properties are deteriorated.

The photoselective absorbent filter of the present invention is completed by coating and drying the above-described photoselective absorbent coating agent. Therefore, since the solvent contained in the coating is removed during the drying process, the photoselective absorption filter includes a dimer of the tetraazapopyrine derivative of Chemical Formula 1 and a plastic resin.

Among the definitions of terms used in the specification of the present invention,

Specific examples of the alkyl group having 1 to 8 carbon atoms include methyl group, ethyl group, propyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, isopentyl group, neopentyl group, octyl group and the like;

Specific examples of the alkoxy group having 1 to 8 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentoxy group and the like;

Specific examples of halogen atoms include fluorine, chlorine, iodine or bromine;

Specific examples of the halide include chloromethyl group, bromomethyl group, urethomethyl group, fluoromethyl group, and the like;

Specific examples of the alkylamino group having 1 to 8 carbon atoms include methylamino group, ethylamino group and the like;

Specific examples of the aminoalkyl group having 1 to 8 carbon atoms include an aminomethyl group and an aminoethyl group.

Hereinafter, the present invention will be described with reference to the following synthesis examples and examples, but the present invention is not limited to the following synthesis examples and examples.

Synthesis Example 1 Synthesis of Dimer of Tetraazapophyrin Derivative of Chemical Formula (3)

The reactant (10 mmol) of Chemical Formula 7 was added to a reaction vessel, and dissolved in 300 mL of DMF. Then, NaH (12 mmol) was added thereto and heated at 100 ° C. for about 1 hour. After 1 hour, the compound of Formula 8 (10 mmol) was added thereto and reacted with heating for 20 hours. After completion of the reaction, the resultant was separated using ethyl acetate and pure water to obtain a compound of formula 3 as a target compound. After purification through recrystallization, the absorption spectrum of the obtained compound (yield: 15%) is shown in FIG. 3. As described in the absorption spectrum of FIG. 3, the compound of Chemical Formula 3 has a strong absorption band in the 580 to 610 nm region and the 660 to 690 nm region.

3

Example 1

100 g of polycarbonate (PC) was added to 300 ml of dichloromethane to completely dissolve. Here, 4 g of NRG light absorber IRG022 (manufactured by Nippon Kayaku Co., Ltd.), 1.35 g of SIR159 (manufactured by Mitsui Chemicals Co., Ltd.), 8 g of TINUVIN928 (manufactured by Shiva Specialty Co., Ltd.), a UV blocking agent, 400 mg of the resultant of Synthesis Example 1 and color balance adjustment 40 mg of DS03 (manufactured by Nippon Sentin Pigment Co., Ltd.), which is a dye, was dissolved to prepare a desired photoselective absorbent coating agent.

The coating agent thus prepared was coated on a transparent glass substrate using spin coating, and then dried at 80 ° C. for 5 minutes to obtain a colored glass substrate having a thickness of about 8 microns. In order to evaluate the stability of the colored glass substrate thus prepared to heat and light, an anti-reflective polyethylene terephthalate film was laminated on the obtained colored glass plate.

The spectrum obtained using the spectrophotometer with respect to the thus obtained colored glass filter is shown in FIG. 4.

Using PDP as a light source, visual characteristics such as red dominant wavelength shift, color temperature shift, duv (degree of color distortion) and visible light transmittance were measured and shown in Table 1 below.

Example 2

A light selective absorbent coating agent, a colored glass substrate, and a filter were prepared in the same manner as in Example 1, except that 600 mg of the result of Synthesis Example 1 was used.

The visual characteristics were measured as in Example 1, and are shown in Table 1 below.

Comparative Example 1

Instead of the result of Synthesis Example 1, a photoselective absorbent coating including tribenzyl tetraazapophyrin (compound of Formula 7), a colored glass substrate, and a filter were obtained in the same manner as in Example 1.

In the case of tribenzyltetraazapophyrin, the absorption spectrum in the solvent is the same as that of FIG. 3, but after drying, the spectrum of the film is greatly changed, and the red dominant wavelength is reduced to decrease the color purity effect. The spectrum of the film after drying is shown in FIG. 4 in comparison with Example 1. As can be seen in Figure 4, in the case of using the photo-selective absorbent coating of Example 1 to selectively shield the 580 to 600nm (orange) region, to maximize the transmittance of 600 to 630nm (red) color purity is significantly improved On the other hand, in Comparative Example 1, the color purity improvement effect is substantially reduced by reducing not only the 580 to 600 nm region but also the 530 to 580 nm green region and the 600 to 630 nm transmittance.

As in Example 1, visual properties were measured and shown in Table 1 below.

Comparative Example 2

Except for using polymethyl methacrylate (PMMA) instead of polycarbonate (PC) was carried out in the same manner as in Example 1 to prepare a photo-selective absorbent coating, a colored glass substrate and a filter.

As a result of 500 hours of heat resistance test (85 ℃ Baking, humidity 65%), there was no change in other pigments when PMMA was applied, but IRG022 showed a significant decrease in heat resistance in PMMA. That is, as can be seen in Figure 5 in the case of using the photo-selective absorbent coating of Example 1, the absorbance is maintained intact in the wavelength band of 850nm or more after heat exposure, while showing a low transmittance in Comparative Example 2, IRG022 after heat exposure Decomposition of (about 60% of the initial concentration of the decomposition) decreases the concentration increases the transmittance of the wavelength band of more than 850nm.

The visual characteristics were measured as in Example 1, and are shown in Table 1 below.

Comparative Example 3

Except for TINUVIN928, a photoselective absorbent coating, a colored glass substrate, and a filter were obtained in the same manner as in Example 1. The light transmittance before and after exposure by Xenon Lamp 67klx for 40 hours was measured using a spectrophotometer, and the results are shown in FIG. As can be seen in FIG. 6, it was confirmed that when the UV blocker is not applied, the light durability of IRG022 is greatly damaged.

The visual characteristics were measured as in Example 1, and are shown in Table 1 below.

division Red dominant wavelength shift (nm) Color temperature shift (k) duv Visible light transmittance (%) Example 1 +5 +1800 +0.0011 57 Example 2 +7 +3200 +0.0018 52 Comparative example 1 (after drying) +3 +2000 +0.0002 51 Comparative Example 2 (After Thermal Exposure) +4 +2000 +0.0007 66 Comparative Example 3 (After Light Exposure) +3 +1300 +0.0005 76

As can be seen from the results of Table 1, the red dominant wavelength shifts of Examples 1 and 2 were +5 nm or more, which resulted in a significant level of color purity improvement, and also in the case of Comparative Examples 1 to 3 in the visible light transmittance. The visible light transmittance due to the decomposition of the overall increase can be seen that the quality of the filter is reduced. The increase in the color temperature after drying of Comparative Example 1 is due to the blue shift generated by the increase in the red absorption due to the increase in the interaction between the dyes as the solvent evaporates. Light exposure, unlike thermal exposure, causes a spectral change in the visible light region (particularly blue) as well as in the NIR region, thereby reducing the color temperature (yellowing) can be seen in Comparative Example 3. The value of the color near white is the color distortion degree (duv). Thermal exposure and light exposure commonly cause decomposition of the pigment, and the color of the filter fades due to the decomposition of the pigment. Can be seen in Comparative Examples 1 to 3.

When the coating agent including the light selective light absorbing agent according to the present invention is applied to a color display device, color purity and contrast of the color display device may be improved by blocking reflected light of the display device and emission light corresponding to an intermediate color of three primary colors.

Claims (14)

A photoselective light absorber for a color display device comprising a dimer of a tetraazapopyrine derivative of the formula (1). <Formula 1> (Wherein R ₁ , R ₂ , R ₃ and R ₄ are each independently Hydrogen; Unsubstituted phenyl group; Alkyl groups having 1 to 8 carbon atoms; An alkoxy group having 1 to 8 carbon atoms; Nitro group; Halogen atom; Alkylamines having 1 to 8 carbon atoms; Cyano group; And A phenyl group substituted with at least one selected from an alkyl group having 1 to 8 carbon atoms, a nitro group, a halogen atom, an alkylamine group having 1 to 8 carbon atoms, an alkylamino group having 1 to 8 carbon atoms, an aminoalkyl group having 1 to 8 carbon atoms, and a cyano group; Or R ₁ and R ₂ in one to three groups in the above formula are fused to each other to form an aromatic ring of Formula 2a to Formula 2f, and the remaining groups are each independently Hydrogen; Alkyl groups having 1 to 8 carbon atoms; An alkoxy group having 1 to 8 carbon atoms; Allyl group; Halogen atom; Cyano group; And Selected from the group consisting of nitro groups, X represents O or NH, [Formula 2a] [Formula 2b] [Formula 2c] [Formula 2d] [Formula 2e] [Formula 2f] The above _{formula, R 5, R 5 ',} R 5 " and R _5' '' they are, each independently Hydrogen; Alkyl groups having 1 to 8 carbon atoms; C1-C8 alkoxy group; Allyl group; Halogen atom; Cyano group; And Selected from the group consisting of nitro groups, R ₆ is an alkyl group or an allyl group having 1 to 8 carbon atoms, X ₁ ^- represents an anion of a halogen element or an alkyl sulfonate having 1 to 8 carbon atoms, and a dotted line portion represents a portion bonded to the pyrrole group of Chemical Formula 1 above.) The photoselective light absorber of claim 1, wherein the tetraazapophyrin derivative of Formula 1 is a compound of Formula 3 below. <Formula 3> The light selective absorbent coating for color display device comprising the light selective light absorber according to any one of claims 1 to 2, a plastic resin and an organic solvent. The coating agent according to claim 3, wherein the content of the photoselective light absorber is 0.05 to 1 wt% based on the coating solids. The coating agent according to claim 3, wherein the plastic resin is at least one selected from the group consisting of polymethyl (meth) acrylate, polyvinyl alcohol, polycarbonate, polyethylene terephthalate, ethylene vinyl acetate and polyvinyl butyral. . The coating agent according to claim 3, wherein the content of the plastic resin is 5 to 40% by weight based on the total weight of the organic solvent. The method of claim 3, wherein the organic solvent is toluene, xylene, propyl alcohol, isopropyl alcohol, dimethylformamide, cyclohexanone, cyclopentanone, tetrahydrofuran, dichloromethane, chloroform, methyl cellulose, ethyl cellulose And at least one selected from the group consisting of dimethylformamide. The coating agent according to claim 3, further comprising a dye. 4. The coating of claim 3 further comprising a sunscreen. 10. The sunscreen agent according to claim 9, wherein the sunscreen is selected from the group consisting of HLS (Hinderd Amine Light Stabilizer) family, including the trade name TINUVIN928 (manufactured by Ciba Specialty Co., Ltd.), phenyl salicylate, benzophenone, benzotriazole and nickel compound quencher. At least one coating agent. The coating agent according to claim 3, further comprising an infrared ray blocking agent. The coating agent according to claim 11, wherein the infrared ray blocking agent is at least one selected from compounds represented by the following Chemical Formulas 4, 5 and 6. <Formula 4> (The above formula, R 'is an alkyl group having 1 to 6 carbon atoms, Y is ^{_{ClO 4 -, Ab 2 F 6}} -, BF 3 -, represent toluene sulfonate or benzene sulfonate anion) <Formula 5> (Wherein M is Ni, Pd or Pt, and R ″ represents hydrogen or an alkyl or alkoxy group having 1 to 10 carbon atoms; phenyl substituted by halogen atom or alkylamine; or phenyl group) <Formula 6> [Wherein M 'is Fe, Ni, Cu, Co or Pt, and R''' is hydrogen; Alkyl or alkoxy groups having 1 to 10 carbon atoms; Halogen atom; Or a nitro group, Q ⁺ is a tetraalkylammonium cation, wherein the alkyl group has 1 to 6 carbon atoms] A light selective absorbent filter for a color display device, comprising a light selective absorbent according to claim 1 and a plastic resin. The filter according to claim 13, wherein the plastic resin is at least one selected from the group consisting of polymethyl (meth) acrylate, polyvinyl alcohol, polycarbonate, polyethylene terephthalate, ethylene vinyl acetate, and polyvinyl butyral. .