KR20040110516A - Composition for making film of optical filter for display device having weatherproof property and process for producing the filter containing the composition - Google Patents

Abstract

PURPOSE: Provided is a film forming composition for an optical filter for display, which has excellent tone-correction characteristics and weather resistance resulting from low sensitivity to moisture with no need of an additional protective layer. CONSTITUTION: The film forming composition for an optical filter for display comprises a hydrophobic polymer resin, visible light-absorbing pigment having a maximum absorption wavelength of 570-610 nm and a near IR-absorbing pigment having an absorption wavelength range of 700-1200 nm. In the composition, the hydrophobic polymer resin has at least one functional group selected from the group consisting of cyanide, amine, hydroxy, carboxy, halide, nitrate, thiocyanide and thiosulfate. The visible light-absorbing pigment and the near IR-absorbing pigment are used in the amount of 0.1-20 parts by weight and 0.05-40 parts by weight, based on the total weight of the polymer resin, respectively.

Description

Composition for making film of optical filter for display device having weatherproof property and process for producing the filter containing the composition

The present invention relates to a film-forming composition of a display optical filter, and more particularly, a film of a display optical filter that is not only excellent in color tone correction characteristics but also less affected by moisture and excellent in weatherability and does not require an additional protective layer. It relates to a film-forming composition of the forming composition and a display optical filter using the same, and a method of manufacturing an optical filter for display using the same.

While demand for cathode ray tubes (CRT), which is used mainly for TV receivers and computer monitors worldwide, is decreasing, liquid crystal display (LCD), EL, and plasma display panel (PDP) that can be flattened, high-definition and large-scaled The demand for flat panel displays such as) is exploding. Domestic manufacturers already have the world's No. 1 production capacity for LCDs, and are recognized globally for next-generation displays such as EL and PDP.

Among next-generation flat panel displays, PDP is a display that displays images by emitting visible light at each pixel by exciting phosphors of three primary colors with ultraviolet rays generated when a mixture of neon and xenon gas filled in a minute space between two sealed glass plates is discharged. As a device, it is attracting attention as a large display device because it is about 1/10 of the thickness compared to the existing CRT and about 1/6 of the light weight based on 40 inches.In Korea, large PDP is produced by Samsung and LG Electronics. Selling. However, near-infrared radiation is inevitably generated during gas discharge during the PDP operation, and since electromagnetic waves are severely radiated from the driving circuit, it may cause malfunction of other home appliances, and thus it is necessary to block it. The blocking of near infrared rays and electromagnetic waves in existing PDP products is solved through the front optical filter module.

In general, the optical filter for plasma display is Korean Patent Registration No. 0215589, Korean Patent Registration No. 00303894, Korean Patent Publication No. 2000-35395, Korean Patent Publication No. 2001-86340, US Patent No. 5,945,209, US Patent No. 6,307,671 No. 6,309,564, and a method of reflecting light in the near-infrared region by alternating deposition of a metal deposition layer such as silver and a high refractive index transparent thin film, or a layer containing a pigment for color correction; A method of designing a layer containing a near infrared dye in a multilayer structure has been studied. However, a method of depositing, sputtering, or ion plating a thin layer of metal on a surface such as glass also reflects light in the visible region, and has a disadvantage in that the manufacturing cost is expensive. Since the glass is used, the filter is heavy and difficult to process. There is a problem.

In general, the phosphor of the plasma display emits orange light near the wavelength of 590nm in addition to pure red, green, and blue light, thereby decreasing color purity, but since pure blue, green, and red light emit maximum light at 440, 530, and 620nm, respectively, In order to improve the color purity by using a half-width (half-width) of the absorption peak of the pigment should be in the range of less than 100nm, more preferably 10 to 50nm. However, since general dyes tend to have a considerably wide absorption band width in a solution state of 100 to 200 nm and a wider absorption range in a polymer film, US Patent No. 6,307,671 and Korean Patent Publication No. 2001-86340 have salts in solution. By adding and using a water-soluble polymer such as gelatin as a matrix polymer, the crystal agglomeration state of the pigment is controlled to adjust the absorption spectrum of the pigment in the polymer film. However, as described in Korean Patent Publication No. 2002-0055410 and Korean Patent Publication No. 2002-0073287, when a water-soluble resin layer such as gelatin is used as a matrix, it is uniform on a transparent substrate such as polyethylene terephthalate or polyethylene naphthalate. Another problem arises that it is difficult to form a coating film and the pigment is easily decomposed by heat or humidity. In addition, when a solvent having a strong polarity is used to coat the water-soluble polymer, it is difficult to remove the remaining solvent due to the strong interaction between the polar solvent and the matrix polymer, resulting in low weatherability and durability. In order to solve this problem, a method of additionally introducing a protective layer is used, but in this case, there is a problem in that the process becomes complicated and the transmittance is lowered.

On the other hand, it is known that there are various problems in producing a near infrared absorbing filter using the near infrared absorbing dye. For example, a cyanine system as a near-infrared absorbing dye is not practical because of its poor stability to light. In addition, the anthraquinone system and the naphthoquinone system have a problem in that the visible light transmittance of the filter is lowered when the near-infrared absorption filter is fabricated using them because the absorption of the visible light region is large. In addition, the phthalocyanine-based pigments have a high light resistance and absorb near-infrared rays in the 700 to 800nm region, but do not absorb the wavelength of more than 800nm, which causes malfunction of peripheral home appliances. In addition, near-infrared dyes may interact with other dyes or polymers to change the coordination bonds or ionic bonds of the dyes, thereby changing the absorption region and increasing the absorption of light in the visible region.

Therefore, even without the addition of other additives, it absorbs the near infrared wavelength range of 800 to 1000 nm, which causes device malfunction, and has excellent light transmittance in the visible range and excellent absorption of light in the visible range of 570 to 610 nm. There has been a need for a film forming composition of an optical filter for display that can improve color purity and a display optical filter containing the same.

The present invention is to solve such a conventional problem efficiently, the object of the film forming composition of the display optical filter is not only excellent in the color correction characteristics, but also under the influence of moisture, excellent weather resistance and does not require an additional protective layer And it is to provide a film forming composition of the display optical filter using the same and a method for producing an optical filter for display using the composition.

1 is a spectral spectrum photograph of a filter using the film forming composition of the display optical filter of the present invention.

2 is a spectral spectrum photograph of a filter using a film forming composition of another comparative display optical filter.

3 is a spectral spectrum photograph of a filter using a film forming composition of another comparative filter.

4 is a spectral spectrum photograph of a filter using a film forming composition of another comparative filter.

5 is a spectral spectrum photograph of a filter using a film forming composition of another filter of the present invention.

6 is a spectral spectrum photograph of a filter using a film forming composition of another filter of the present invention.

7 is a spectral spectrum photograph of a filter using the film forming composition of another filter of the present invention.

8 is a spectral spectrum photograph of a filter using a film forming composition of another comparative filter.

In order to achieve the above object, the film-forming composition of the display optical filter according to the present invention contains a hydrophobic polymer resin, a visible light absorbing dye having a maximum absorption wavelength of 570 to 610 nm and a near infrared absorbing dye absorbing a wavelength of 700 to 1200 nm. However, the hydrophobic polymer resin has at least one functional group selected from cyan group, amine group, hydroxy group, carboxyl group, halide group, nitric acid group, thiocyanate group, thiosulfate group, and the visible light absorbing pigment is added to the total weight of the polymer resin It is contained in an amount of 0.1 to 20 parts by weight, and the near-infrared absorbing pigment is characterized in that it is contained in an amount of 0.05 to 40 parts by weight.

In addition, the method for producing an optical filter for a display containing the film-forming composition of the display optical filter according to the present invention is 1: 5 to 1 with a solvent having a high solubility and a suitable volatility for uniform coating and fast drying Mixing at a weight ratio of 10; Coating the mixture on a transparent substrate and drying the coating to a thickness of 0.1 μm to 1 mm; And combining the coated transparent substrate with an electromagnetic wave shielding layer, an antireflection layer, a hard coating layer or an antistatic layer.

The film-forming composition of the display optical filter of the present invention includes a dye that absorbs visible light at a wavelength of 570 to 610 nm, and includes a dye that absorbs near infrared light at a wavelength of 700 to 1200 nm, thereby preparing an optical filter using the same. In general, the transmittance in the visible light region other than 570 to 610 nm is 70% or more, the transmittance is 10% in the 800 to 850 nm region, and the transmittance is 5% or less in the 900 to 1000 nm region. Suitable for

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

The film-forming composition of the display optical filter of the present invention is configured to contain a hydrophobic polymer resin, a visible light absorbing dye having a maximum absorption wavelength of 570 to 610 nm, and a near infrared absorbing dye absorbing a wavelength of 700 to 1200 nm. Applying the wavelength change of the pigment using the proposed controlled polymer copolymer, it is possible to manufacture an optical filter that has heat and light stability and absorbs light of a desired wavelength using the existing pigment. In addition, the present invention is useful because it can be widely applied to various fields such as optical filter fabrication, optical recording media, optical cards, laser printers, protective glasses, CCD camera filters, sensors, and the like in addition to plasma displays. In addition, the present invention can not only change the absorption wavelength of the near infrared dye to the desired range by changing the composition of the polymer copolymer and blend, but also improve the thermal stability and light stability of the near infrared dye due to interaction with the polymer. There is an advantage to produce a useful resin composition that can be widely applied to the field of laser printers, optical recording media, optical cards, protective glasses, etc., where near-infrared dyes are used.

The hydrophobic polymer resin of the above components acts as a matrix in the manufacture of the filter, and has one or more functional groups to enable the absorption of a narrow wavelength without other additives such as salts to interact with other visible light absorbing pigments. However, by containing them, the electron density of the near-infrared dye is not greatly changed, and the hygroscopicity of the moisture is very low, so the weather resistance is excellent and the protective layer is not required, so the process is simplified. To this end, the resin is selected from cyan group, amine group, hydroxy group, carboxy group, halide group (F, Cl, Br, I), nitric acid group, thiocyanate group (SCN), thiosulfate group (S ₂ O ₃ ) It is preferable to have more than one functional group. More specifically, the polymer resin contained in the film-forming composition for an optical filter of the present invention is a polymer in which two or more monomers having different properties are copolymerized or blended, preferably one or two or more hydrophobic monomers A copolymer resin or a blend resin with one or two or more monomers having one or two or more functional groups, wherein the functional group is 0.1 to 50 mol%, more preferably 5 to 5 mol% of the total polymer resin. 30 mol%. If the content of the functional group is less than 0.1 mol%, there is a problem that the absorption peak of the visible light region is widened, and if the content of the functional group exceeds 50 mol%, hydrophobicity is weak. The hydrophobic monomer used at this time is styrene-based, methyl methacrylate, ethyl acrylate, butyl acrylate or a mixture thereof, and the monomer having the functional group is acrylonitrile-based, methacrylic acid, acrylic acid, maleic acid, sulfonic acid , Quaternary ammonium, phosphoric group, phosphonic group or mixtures thereof, or methacrylic acid, acrylic acid, maleic acid, quaternary ammonium, in which an acidic group is substituted with a metal ion selected from lithium, sodium, potassium, zinc, calcium, aluminum, Phosphoric groups, phosphonic groups or mixtures thereof. In particular, the hydrophobic polymer resin of the polyimide, polyvinyl butyral, styrene-butadiene copolymer, polycarbonate, polyvinyl chloride, polysulfone, polyethersulfone, polyetherimide, polyamide or polyamic acid into which the functional group is introduced It may be one or two or more resins selected from derivatives. More preferably, the hydrophobic polymer resin is a styrene-acrylonitrile copolymer resin by copolymerization of a styrene monomer and an acrylonitrile monomer having the functional group, wherein the styrene monomer is styrene, α-methyl styrene, Styrene derivatives in which a hydrogen atom of a benzene nucleus is substituted with a halogen atom or an alkyl group having 1 to 2 carbon atoms; typical examples thereof include styrene, ο-chlorostyrene, ρ-chlorostyrene, 2,4-dimethylstyrene, t-butylstyrene, and the like. There is this. The acrylonitrile monomers include (meth) acrylonitrile, vinylidene cyanide, α-chloroacrylonitrile and the like.

On the other hand, the dye contained in the optical filter film according to the present invention is not particularly limited as long as it improves color purity and sufficiently absorbs near infrared rays according to the emission spectrum of the applied phosphor. Generally, pigments absorbing visible light in the visible range of 570 to 610 nm include cyanine compounds, squarium compounds, azomethine compounds, xanthene compounds, and oxonolic compounds. It may be one or two or more compounds selected from the group consisting of oxonol compounds, and the dyes that absorb light in the near infrared region of 700 to 1200 nm include polymethine compounds, phthalocyanine compounds, and naphthoquinone compounds. (naphthoquinone compounds), anthraquinone compounds, dithiol-metal complex compounds, dimonium compounds, dimonium compounds, or thioram compounds. Two or more compounds can be used. At this time, the visible light absorbing dye is preferably contained in an amount of 0.1 to 20 parts by weight based on the total weight of the polymer resin. When the content of the visible light absorbing dye is less than 0.1 parts by weight, the orange light may not be sufficiently absorbed. If the amount of the visible light absorbing dye is greater than 20 parts by weight, the transmittance of the visible light region may be lowered. In addition, the near-infrared absorbing pigment is preferably contained in an amount of 0.05 to 40 parts by weight based on the total weight of the polymer resin, in general, when the content of the near-infrared pigment is less than 0.05 parts by weight, it will not sufficiently absorb the near infrared, 40 weight If it is excessive, the problem that the transmittance of the visible light region is lowered.

In addition, the film forming composition of the optical filter may further include an ultraviolet light absorber or an anti-chromic agent. The anti-coloring agent serves to stabilize the pigment, and is not particularly limited as long as it is a compound capable of absorbing UV or stabilizing radicals generated by UV, and is not limited to hydroquinone derivatives, hydroquinone diether derivatives, phenol derivatives, spiroindan or Methylenedioxybenzene derivatives, chroman, spirochroman or coumarin derivatives, hydroguinon monoether or p-aminophenol derivatives, bisphenol derivatives and the like can be used.

On the other hand, the method for producing an optical filter for display containing the composition comprises the steps of mixing the composition with a solvent; Coating the mixture on a transparent substrate and drying the coating to a thickness of 0.1 μm to 1 mm; And combining the coated transparent substrate with an electromagnetic wave shielding layer, an antireflection layer, a hard coating layer or an antistatic layer.

First, the solvent to be mixed with the composition is not particularly limited as long as it dissolves the composition and has a suitable volatility for uniform coating and fast drying, but for example, dimethylformamide, methylethylketone, ethanol, tetrahydrofuran , Acetone or a mixed solvent thereof can be used. The composition and the solvent are preferably mixed in a weight ratio of 1: 5 to 1:10. When the content of the composition in the solvent is greater than the mixing ratio 1: 5, the viscosity of the solution is high and the coating is not easy, when less than 1:10, the viscosity of the solution is low, there is a problem that the coating is not easy. At the time of mixing, it is easier to mix using an ultrasonic sprayer.

Subsequently, the mixed solution is coated on a transparent substrate and then dried to form a coating layer, wherein the thickness is 0.1 μm to 1 mm, more preferably 0.5 μm to 100 μm. Glass, cellulose ester, polyamide, polycarbonate, polyester, polystyrene, polyolefin, polymethyl methacrylate, polysulfone, polyether sulfone, polyether ketone, polyetherimide, polyoxyethylene may be used as the transparent substrate. have. Preferably triacetyl cellulose, polycarbonate or polyethylene terephthalate is used.

Subsequently, the filter composed of the transparent substrate and the coating layer may be used as an optical filter for plasma display by combining an existing electromagnetic shielding layer, an antireflection layer, a hard coating layer, an antistatic layer, a UV absorbing layer, a smoothing layer, and an antifouling layer. As the electromagnetic shielding layer, a method of laminating a transparent conductive film made of indium oxide, tin oxide, silver, etc. on a plastic transparent substrate, and a synthetic fiber woven fabric such as polyester coated with a copper / nickel thin film layer on a transparent substrate is laminated on a transparent substrate. It is not only manufactured by conventionally known methods such as the method of integration, the method of laminating a mesh conductor on a glass or plastic transparent substrate, and the method of patterning the conductive mesh on a glass or plastic transparent substrate, Transparent electromagnetic shielding layers using carbon nanotubes are also available.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the Examples are described only for the purpose of illustrating the present invention, and the scope of the present invention is not limited to the Examples.

Example 1

10 g of a styrene acrylonitrile resin (poly (styrene-co-acrylonitrile; Aldrich, Milwaukee, WI) containing 30 mol% of a cyan group as a hydrophobic polymer resin in a beaker, sulfohodeamine 101 hydrate as a visible light absorbing dye (Sulforhodamine Aldrich, Milwaukee, WI 200 mg, IR 140 (Aldrich, Milwaukee, WI) 180 mg, SDA 8630 (HW Sands Corporation, Jupiter, FL) 70 mg and NQ 21 as a near infrared absorbing pigment 2 g of (Carlit, Tokyo, Japan) was added to prepare a film forming composition of the display optical filter.

Comparative Example 1

Except for using a polymethyl methacrylate resin in place of the polystyrene acrylonitrile resin in Example 1, a film forming composition was prepared according to the same composition and method.

Comparative Example 2

Except for using a polystyrene resin instead of a polystyrene acrylonitrile resin as a resin in Example 1, a film forming composition was prepared according to the same composition and method.

Comparative Example 3

Except for using a polyacrylonitrile resin instead of a polystyrene acrylonitrile resin in Example 1, a film forming composition was prepared according to the same composition and method.

Example 2

Styrene acrylonitrile resin (poly (styrene-co-acrylonitrile; Aldrich, Milwaukee, WI) 200 mg as a hydrophobic polymer resin in a beaker, IR 140 (Aldrich, Milwaukee, WI) 180 mg, SDA as a near infrared absorbing dye 70 mg of 8630 (HW Sands Corporation, Jupiter, FL) and 2 g of NQ 21 (Carlit, Tokyo, Japan) were added to prepare a film forming composition for a display optical filter.

Example 3

10 g of cationic polyvinylpyrrolidone HS-100 (poly (vinyl pyrrolidone; ISP, USA) as a resin and 0.2 g of SDA 3610 (HW Sands corporation, Jupiter, FL) as a near infrared absorbing dye were added to the beaker. The film forming composition of the optical filter was prepared.

Example 4

Near-infrared absorption of the blend of 10 g of polyvinyl pyrrolidine (ISP, USA) and 0.1 g of polyimethylene (Aldrich, Milwaukee, WI) as a resin in a beaker 0.2 g of SDA 3610 (HWSands corporation, Peter, Calif.) Was added as a dye to prepare a film forming composition of a display optical filter.

Comparative Example 4

Except that the polyethyleneimine is not added in Example 4, the film-forming composition was prepared according to the same composition and method.

Preparation Example 1

100 g of a 6: 4 mixed solvent of dimethylformamide and methyl ethyl ketone were introduced into the composition of Example 1, followed by stirring at 300 rpm. After stirring for 30 minutes, the mixture was applied onto a polyester film using a wire bar coaters, and then dried in a 90 ° C. dryer for 30 minutes to prepare a display optical filter in the form of a transparent substrate having a thickness of 6 μm. It was.

On the other hand, this filter was subjected to a heat resistance test for 500 hours in a temperature & humidity chamber at 80 ° C. and a relative humidity of 90%, and the spectral spectrum results before and after the heat test were shown in FIG. 1. In FIG. 1, the transmittance according to the wavelength before the heat test is indicated by a solid line (-), and the transmittance according to the wavelength after the heat test is indicated by a dotted line (---). As can be seen in Figure 1, the visible light transmittance of the filter is good at 70% or more, it can be expected that the low transmittance in the 570 to 610nm wavelength region of the visible region will be excellent in color correction, and other causes of malfunction It can be seen that the near-infrared region of 850 to 1000 nm is sufficiently shielded. In addition, the decomposition of the dye was suppressed even after the heat resistance test for 500 hours, and the spectrum also showed little change, indicating that it had sufficient weather resistance to be used as a filter for PDP.

Comparative Production Example 1

A filter was prepared according to the same composition and method as in Preparation Example 1, except that the composition of Comparative Example 1 was used. As a result, as shown in Fig. 2, the absorption wavelength (solid line notation) of the absorption spectrum of the color tone correcting dye was found to be wider when compared with Production Example 1 (dotted notation) using a styrene acrylonitrile resin.

Comparative Production Example 2

A filter was prepared according to the same composition and method as in Preparation Example 1, except that the composition of Comparative Example 2 was used. As a result, the shrinkage and flexibility of the formed film are insufficient, and the absorption wavelength (solid line notation) of the color tone correcting pigment becomes wider as compared to Preparation Example 1 (dotted notation) using a styrene acrylonitrile resin as shown in FIG. The phenomenon could be confirmed.

Comparative Production Example 3

A filter was manufactured according to the same composition and method as in Preparation Example 1, except that the composition of Comparative Example 3 was used. As a result, not only the film formation is easy, but also the phenomenon that the absorption wavelength (solid line notation) of the color tone correcting dye becomes wider when compared with Production Example 1 (dotted notation) using styrene acrylonitrile resin as shown in FIG. I could confirm it.

Preparation Example 2

100 g of a 6: 4 mixed solvent of dimethylformamide and methyl ethyl ketone were introduced into the composition of Example 2, followed by stirring at 300 rpm. After stirring for 30 minutes, the mixture was coated on a polyester film using a bar coater, and then dried in a 90 ° C. dryer for 30 minutes to prepare a display optical filter in the form of a transparent substrate having a thickness of 6 μm. This filter was adhered to the electromagnetic shielding copper mesh according to a conventional method to complete an optical filter.

The heat resistance test was carried out under the same conditions as in Preparation Example 1, and the spectral spectral results of the filter are shown in FIG. As can be seen in FIG. 5, the near-infrared region is sufficiently shielded, and the transmittance of the visible ray region is also good at 50% or more.

Preparation Example 3

100 g of a 3: 2: 5 mixed solvent of dimethylformamide, methyl ethyl ketone, and ethanol was introduced into the composition of Example 3, and ultrasonically dispersed. After ultrasonic dispersion for 6 minutes, the obtained mixture was applied onto a polyester film using a bar coater, and then dried in a 90 ° C. dryer for 30 minutes to prepare a display optical filter in the form of a transparent substrate having a thickness of 3 μm. Spectral spectrum results of the prepared filter are shown in FIG. As can be seen in Figure 6, the maximum absorption wavelength in the DMF solution of SDA 3610 was found to be 1020nm due to the introduction of HS-100, which is 870nm or cationic polymer resin.

Preparation Example 4

100 g of a 3: 2: 5 mixed solvent of dimethylformamide, methyl ethyl ketone, and ethanol was introduced into the composition of Example 4, and ultrasonically dispersed. After ultrasonic dispersion for 6 minutes, the obtained mixture was applied on a polyester film using a bar coater, and then dried for 30 minutes in a 90 ° C. dryer to prepare a display optical filter in the form of a transparent substrate having a thickness of 3 μm. The spectrum spectrum of the prepared filter is shown in FIG. 7. As can be seen in Figure 7, it was confirmed that the maximum absorption wavelength is 1020nm due to the blend of the polymer resin K-30 and polyethyleneimine.

Comparative Production Example 4

A filter was prepared according to the same composition and method as in Preparation Example 1, except that the composition of Comparative Example 4 was used. In this case, as shown in FIG. 8, the maximum infrared absorption wavelength was 870 nm.

As can be seen from the above, the filter containing the film-forming composition of the optical filter for plasma display of the present invention by designing a polymer containing one or more functional groups to use as a matrix does not use a separate processing aid or hydrophilic polymer It can absorb only visible light of a desired wavelength without designating each monomer of the polymer so as not to interact with near-infrared pigments, so that the electron density of the near-infrared pigments does not change in the polymer, thereby shielding the near-infrared region and at the same time Permeability of can be maintained. In addition, by controlling the functional groups, the pigments are dispersed evenly in the film without using hydrophilic polymers, so that they are not affected by moisture and have excellent weather resistance, and a process is simple because no protective layer is required to prevent the influence of moisture. Shorter process times and higher yields increase the economics of the manufacturing process.

In addition, the present invention is useful because it can be widely applied not only to optical filters for displays but also to various fields such as laser printers, protective glasses, sensors, filters of CCD cameras, optical recording media, optical cards, and the like.

Claims (7)

Hydrophobic polymer resin, a visible light absorbing dye having a maximum absorption wavelength of 570 to 610 nm and a near infrared absorbing dye absorbing a wavelength of 700 to 1200 nm, wherein the hydrophobic polymer resin is a cyan group, an amine group, a hydroxyl group, a carboxyl group, a halide group, At least one functional group selected from nitric acid group, thiocyanate group and thiosulfate group, the visible light absorbing dye is contained in an amount of 0.1 to 20 parts by weight based on the total weight of the polymer resin, the near infrared absorbing dye is 0.05 to 40 weight A film forming composition of a display optical filter, characterized in that contained in a negative amount. The method of claim 1, wherein the visible light absorbing dye is one or two or more compounds selected from the group consisting of cyanine-based, xalium-based, azomethine-based, xanthene-based, oxonol-based compound, the near-infrared absorbing pigment is polymethine-based And phthalocyanine-based, naphthoquinone-based, anthraquinone-based, dithiol metal complexes, dimonium compounds, and thiolam-based compounds. The hydrophobic polymer resin of claim 1, wherein the hydrophobic polymer resin is a copolymer resin or a blend resin of one or two or more hydrophobic monomers and one or two or more monomers having one or more functional groups. Styrene, methyl methacrylate, ethyl acrylate, butyl acrylate or mixtures thereof, and the monomer having the functional group is acrylonitrile, methacrylic acid, acrylic acid, maleic acid, sulfonic acid, quaternary ammonium, phosphoric group, phosphate Methacrylic acid, acrylic acid, maleic acid, quaternary ammonium, phosphoric group, phosphonic group or theirs in which the phenic group or mixture thereof or acidic group is substituted with metal ions selected from lithium, sodium, potassium, zinc, calcium and aluminum Film forming composition of the optical filter for display, characterized in that the mixture. The method of claim 3, wherein the hydrophobic polymer resin is a polyimide having a functional group, polyvinyl butyral, styrene-butadiene copolymer, polycarbonate, polyvinyl chloride, polysulfone, polyethersulfone, polyetherimide, polyamide or polya The film forming composition of the display optical filter, characterized in that one or two or more resins selected from the derivatives of the acid. The film forming composition of claim 4, wherein the hydrophobic polymer resin is a styrene-acrylonitrile copolymer resin obtained by copolymerization of a styrene-based acrylonitrile-based resin. The method of claim 5, wherein the styrene system is a styrene derivative in which a hydrogen atom of styrene, α-methylstyrene or benzene nucleus is substituted with a halogen atom or an alkyl group having 1 to 2 carbon atoms, and the acrylonitrile system is methacrylonitrile or vinyl cyanide. Film forming composition of the display optical filter, characterized in that it is leaden or α-chloroacrylonitrile. Mixing the composition of claim 1 with a solvent in a weight ratio of 1: 5 to 1:10; Coating the mixture on a transparent substrate and drying the coating to a thickness of 0.1 μm to 1 mm; And The method of manufacturing an optical filter for a display, comprising the step of combining the coated transparent substrate and the electromagnetic wave shielding layer, an antireflection layer, a hard coating layer or an antistatic layer.