KR101340549B1 - Optical film and display filter comprising the same - Google Patents

Abstract

The optical film of the present invention comprises a first dye having a visible light total transmittance of 82% or more; And a second dye having a color correction function, wherein the PDP module itself has a color reproducibility of 80% or more as compared to NTSC. The optical film may maintain transmittance of more than 37% of visible light and increase the color reproduction of the PDP module itself compared to NTSC.

Description

Optical film and display filter including the same {OPTICAL FILM AND DISPLAY FILTER COMPRISING THE SAME}

The present invention relates to an optical film included in a display filter. More specifically, the present invention relates to an optical film including a specific first color and a second color, and an optical film having a color reproduction ratio of 80% or more of the PDP module itself, and a display filter including the same.

When using display devices such as liquid crystal displays (PDPs), plasma display panels (PDPs), cathode ray tubes (CRTs), and electro luminescence displays (ELDs), outdoors or under bright lighting, Light reflects off the display surface. The image is formed on the display device by external light, and due to the image formation phenomenon by the external light, problems such as deterioration of visibility and glare occur in the display device.

In order to solve the problem of the display device, the reflectance of external light or the like is reduced by applying various anti-reflection films to the display device.

Antireflection film is mainly used for the characteristics of light reflection and destructive interference to reduce the reflectance, the most typical method of inducing reflection reflection is to give the irregularities on the surface of the display device, which is a low cost manufacturing cost Due to its advantages, it is widely used for manufacturing solar cells and other optical components.

However, when the antireflection film using the unevenness is applied to the display device, problems in image display may occur depending on the size, height, and shape of the unevenness, that is, problems in resolution, clarity, and visibility due to unevenness.

Due to the problem of the antireflection film using the unevenness, recently, the antireflection function has been performed by using a multi-layer antireflection film through destructive interference due to diffraction of light.

Vacuum deposition, sputtering, chemical vapor deposition (CVD), solution coating (Wet Coating), and the like are used to manufacture the multilayer antireflective film. In this way, a multilayer laminate film of a plurality of thin films is formed using materials having different refractive indices. To reduce reflectance in the visible region.

However, methods such as vacuum deposition, sputtering, and CVD are expensive in terms of equipment, manufacturing cost, and large area. With such a cost aspect and the large area of a display apparatus, the manufacture of the anti-reflection film using the solution coating method is attracting the attention in recent years.

A general antireflection film has a structure in which a hard coat layer, a high refractive index layer, and a low refractive layer are laminated on transparent substrates such as glass, plastic film, and sheet. The high refractive index layer generally has an index of refraction of 1.6 or more by adding inorganic metal oxides and sulfide particles, and the low refractive index layer has a refractive index of about 1.3 to 1.5 by adding silica, magnesium fluoride, and fluororesin.

Such an antireflection film has a haze of 1% or less, an average reflectance of 3% or less in the visible light region, and a method of coating one or more layers having different refractive indices on a plastic substrate is mainly used.

On the other hand, there is a problem of generating near infrared rays in the display device. For example, in the case of PDP, a large amount of near infrared rays is generated when the discharge gas emits ultraviolet rays to emit the phosphor. Such near-infrared rays cause a malfunction of the remote controller for operating home appliances such as PDP itself as well as other audio in the surroundings. This is because the wavelength band near 930nm used in the remote control of many home appliances overlaps with the wavelength band of near-infrared light generated from PDP.

Recently, attention has been focused on how closely a display device reproduces colors. In addition, Neon gas, which is one of the main components of penning gas to excite the phosphor in the plasma display, is replaced by PDP TV from the existing cathode ray tube TV, and orange neon light always emits light regardless of emission color. As a result of degrading green and red color purity, an optical film capable of selectively cutting neon light in the visible light region of 580 to 600 nm was required in order to obtain red and green light having high color purity. In order to solve the problem, a color correction film using a tetraazaporphyrin-based dye or a cyanine-based dye has also been attempted. (Japanese publication 2000-275432, US registration 6532120)

Such a decrease in green and red color purity has been pointed out as a major problem in reducing the overall color reproduction and restoring colors close to natural colors. As a method of measuring the color reproduction range, the method of expressing the PDP color reproduction area by the NTSC color reproduction area is mainly used. NTSC stands for National Television System Committee and is one of the methods for transmitting and receiving color television. The biggest feature is that broadcasting and reception is possible without distinguishing black and white or color, and NTSC is one of the methods used in USA, Canada, Japan and Korea. Color reproducibility is a numerical expression of the ability to express colors on a display. It is mainly expressed in the area ratio using 'XY color coordinates' of CIS (Communication Internation del'Eclairage) and is based on NTSC standard. In general, R (red), G (green), and B (blue) vertices are displayed in the CIE color coordinates, and the area of the triangle following the points is calculated and expressed in percent of NTSC. NTSC color reproduction area is 0.1582. For example, if the color reproduction area is 0.12656, the color reproduction rate is 80%, and the color reproduction rate 80% means that the number of NTSC standard colors can be expressed by 80%. After all, the higher the color reproducibility, the more colors it means.

In general, an optical film having an anti-reflection function to prevent glare and an optical film having a function of blocking near-infrared rays that cause a remote control malfunction and improving color purity are respectively used as separate optical films for display devices such as PDPs. Has been applied. In this case, at least two optical films are required to perform a near infrared ray blocking function while having anti-reflection function and high color reproducibility, and an adhesive layer for adhering each optical film is also required, which makes the process complicated and manufacturing efficiency. Will be lowered.

An object of the present invention is to provide an optical film that can achieve a PDP color gamut of 80% or more by increasing the color reproducibility of the PDP module itself of 80% or less by 3% to 10%.

Another object of the present invention to provide an optical film having a visible light total transmittance of 37% or more.

Still another object of the present invention is to provide an optical film that can exhibit high color reproducibility and at the same time a reflection prevention function for preventing glare and a near infrared absorption function for preventing a malfunction such as a remote controller can be simultaneously implemented in one film.

One aspect of the invention relates to an optical film. The optical film may include a first dye having a total light transmittance of 82% or more; And a second dye having a color correction function, wherein the PDP module itself has a color reproducibility of 80% or more as compared to NTSC. The first pigment may have a near infrared ray transmittance of 20% or less.

In embodiments, the second pigment may have an absorption function in the wavelength region of 380 to 780 nm.

The weight ratio of the first pigment and the second pigment may be 1: 0.0001 to 1: 0.5.

In embodiments, the first pigment may include at least one of a thiol nickel complex, a diimmonium compound, a polymethine compound, an anthraquinone compound, a phthalocyanine compound, and a naphthalocyanine compound.

The second pigment may include at least one of porphyrin-based, cyanine-based and squarylium-based dyes. In addition, the second pigment may further include at least one of an anthraquinone pigment, a perinone pigment, a methine pigment, a monoazo pigment and a disazo pigment.

In one embodiment, the optical film may have a visible light transmittance of 37% or more. Preferably, the optical film may have a visible light transmittance of 50 to 90%.

In one embodiment, the optical film includes a base film and a near infrared absorbing layer laminated on one surface of the base film, and the near infrared absorbing layer is formed from a composition including the first color and the second color.

In embodiments, the composition may include 0.01 to 5 parts by weight of the first pigment and 0.001 to 5 parts by weight of the second pigment, based on 100 parts by weight of the binder.

The binder may include at least one of melamine, urethane, epoxy, polyester, polyether, polyimide, silicone, and acrylic resins.

In one embodiment the composition may further comprise tin-doped indium oxide, antimonium-doped tin oxide or a combination thereof.

The composition may further include an adhesive component, for example, a curing agent, a radical reactant, and the like.

In another embodiment, the optical film may be an antireflection layer formed on the other surface of the base film.

The anti-reflection layer may include a first layer having a refractive index of 1.55 to 2.4 on a surface in contact with the base film and a second layer having a refractive index of 1.35 to 1.50 on the other surface of the first layer.

In another embodiment, the optical film may further form an electromagnetic shielding film on the other surface of the near infrared absorbing layer.

Another aspect of the invention relates to a display filter comprising the optical film. The display filter may be applied to a cathode-ray tube (CRT) display, a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescence display (ELD), or the like, and may be particularly preferably applied to a module for a PDP.

The optical film according to the present invention has a color reproducibility of 80% or more of the PDP module itself compared to NTSC, and since the anti-reflection function and the near-infrared absorption function are implemented in one film, it is possible to prevent glare by external light with only a single film, It can block near-infrared rays that cause malfunctions, realize clear image quality, reduce the number of films for display filter production compared to the prior art, and thus lower display manufacturing costs, and CRT (Cathode-Ray). It can be usefully applied to the manufacture of displays such as tube (LCD), liquid crystal display (LCD), plasma display panel (PDP), or electro luminescence display (ELD).

1 schematically illustrates a cross section of another optical film in one embodiment of the invention.
Figure 2 schematically shows a cross section of an optical film in another embodiment of the present invention.
3 (a) and 3 (b) schematically show a cross section of an optical film in another embodiment of the present invention.
4 (a) and 4 (b) schematically show cross sections of another optical film in another embodiment of the present invention.
5 is a graph showing transmittances of Examples and Comparative Examples according to near-infrared absorption and color reproduction improvement.
6 is a graph showing reflectances of Examples and Comparative Examples according to visible light reflection.
7 is a graph showing reflectances of the examples and the comparative examples according to the visible light transmittance of the first pigment.

The optical film of the present invention includes a first dye and a second dye, and the color reproducibility of the PDP module itself compared to NTSC is 80% or more.

The first dye has a visible light total transmittance of 82% or more and a near infrared region transmittance of 20% or less. In this way, by applying the first pigment having a near infrared ray transmittance of 20% or less, it is possible to prevent a remote control operation error.

In embodiments, the first pigment may be a thiol nickel complex, a diimmonium compound, a polymethine compound, an anthraquinone compound, a phthalocyanine compound, or a naphthalocyanine compound, and two or more of them may be used in combination.

Commercially available as the first pigments include YKR3080, YKR3070, YKR2900 from Yamamoto Chemical, IR series from Japan Catalyst, MIR101 from Midori Chemical, AM and IM series from Nagase, CIR 1081, CIR 1085, FD-HB and FD from Japan Carlit. -RH, Nippon Kayaku's PDC 220 C, PDC 680, and the like.

The second pigment has a color correction function and may have an absorption function in the wavelength region of 380 to 780 nm.

In embodiments, the second pigment may include at least one of porphyrin-based, cyanine-based and squarylium-based pigments. In addition, the second pigment may further include at least one of an anthraquinone pigment, a perinone pigment, a methine pigment, a monoazo pigment and a disazo pigment.

Commercially available as the second pigments include Japanese catalysts PD 311, PD 319, PD346 Asahi Denka TY171, TY102, and the like. Among the anthraquinone pigments, commercially available products as aminoanthraquinone pigments include pigments Green-5B, Blue-RR, Redvio-RV, Violet-R, and Green-G from M.Dohmen. The product marketed as the Perinone-based pigments include the pigment Red A2G manufactured by Mddomen Corporation, and the product marketed as the Disazo-based pigments is manufactured by Mddomen Corporation Pigments Black KB, Black K, and Pigment Yellow 93 (C21H18N4O2) manufactured by Yabang, and the like, are not limited thereto.

The weight ratio of the first pigment and the second pigment may be 1: 0.0001 to 0.5. Optical film having the above range can be obtained more than 80% of the color reproduction rate of the PDP module itself compared to NTSC, can have a visible light transmittance of more than 37%, can capture the body color. Preferably, the first color: the second color is 1: 0.0001 to 0.4, and more preferably the first color: the second color is 1: 0.0001 to 0.35. Most preferably, 1st color: 2nd color = 1: 0.001-0.1.

In one embodiment, the optical film has a visible light transmittance of 37% or more, preferably 50 to 90%.

In an embodiment, the optical film may increase the color reproducibility of 3% to 10% even for a PDP module having a color reproducibility of 80% or less of the PDP module itself compared to NTSC.

In embodiments, the first dye and the second dye may be included as a near infrared absorbing layer of the optical film.

1 schematically illustrates a cross section of another optical film in one embodiment of the invention. The optical film includes a base film 10 and a near infrared absorbing layer 20 laminated on one surface of the base film.

The base film 10 may be made of a conventional transparent polymer. Specific examples include cellulose esters including cellulose triacetate, cellulose propionate, cellulose butyrate, cellulose acetate propionate, nitro cellulose and the like; Polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene 1,2-diphenoxyethane-4,4'-dicarboxylate, and poly Polyesters including butylene terephthalate and the like; Polystyrene, polyolefin, polysulfone, polyether sulfone, polyarylate, polyether-imide, polymethyl methacrylate, polyether ketone, polyvinyl alcohol, polyvinyl chloride, and the like are possible, but are not necessarily limited thereto. Among these, polyester is preferable.

The near-infrared absorbing layer 20 is formed from a composition comprising the first pigment and the second pigment.

The composition may include a binder, the first color and the second color. In embodiments, the composition may include 0.01 to 5 parts by weight of the first pigment and 0.001 to 5 parts by weight of the second pigment, based on 100 parts by weight of the binder. In the above range, the color reproducibility and the near infrared ray blocking effect can be achieved.

The binder may be a resin that is cured or dried by applying energy such as heat, ultraviolet rays, and electron beams. For example, melamine-based, urethane-based, epoxy-based, polyester-based, polyether-based, polyimide-based, silicone-based, acrylic-based resins and the like may be used, but are not necessarily limited thereto. These may be used alone or in combination of two or more.

In addition, the composition may further include a metal oxide for effective near-infrared blocking. Examples of the metal oxide may be tin-doped indium oxide, antimonium-doped tin oxide, or a combination thereof.

In one embodiment, the near-infrared absorbing layer may be formed by stirring the first and second pigments described above in a solvent, mixing the binder and preparing a coating solution composition, coating the transparent substrate 10 and then heating and drying the same. have.

The solvent may be methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), acetone, cyclohexanone, cyclopentanone, or dioxolane, which is an ether compound. It is preferable to use at least one of dioxane, dimethoxyethane and aromatic compounds toluene and xylene. The content of the solvent is not limited, and may be used within the range of 10 to 90% by weight of the total weight of the composition in consideration of the viscosity of the composition, the thickness of the film and the like.

In another embodiment, the composition may further include a curing agent, a radical reactant, and the like to impart adhesion performance. As such, when the hardener, the radical reactant, or the like is further included, the near-infrared absorbing layer may have adhesive performance.

Figure 2 schematically shows a cross section of an optical film in another embodiment of the present invention. The optical film may include a base film 10 and an adhesive near infrared absorbing layer 20 ′ laminated on one surface of the base film. As such, when the near-infrared absorbing layer 20 'itself has adhesiveness, other functional layers may be laminated on the other surface without intervening a separate adhesive.

The pressure-sensitive adhesive is not particularly limited as long as it is an adhesive component for optical films known in the art. For example, an ultraviolet curable adhesive, a thermosetting adhesive, etc. can be used. In the specific example, the acrylic adhesive binder which uses 1 or more types of alkyl acrylates, such as methyl acrylate, ethyl acrylate, butyl acrylate, and 2-ethyl hexyl macroacrylate, as a polymerization component can be used. Moreover, hydroxyl-containing methacrylates, such as carboxylic acid containing methacrylates, such as acrylic acid, maleic acid, methacrylic acid, itaconic acid, and crotonic acid, and hydroxymethyl methacrylate, butyl methacrylate, isopropyl methacrylate, etc. Polymerizable vinyl monomers such as alkyl methacrylate, vinyl acetate and vinyl propionate may be added as copolymerization components. It is preferable to contain such a copolymer component about 0.5 to 20 weight% with respect to an adhesive binder. As for the molecular weight of the said adhesive binder, about 50,000-2 million are suitable, and it is preferable that glass transition temperature is 0 degrees C or less.

In addition, isocyanate-based crosslinkers such as hexamethylene diisocyanate and toluene diisocyanate, ethylene glycol diglycidyl ether, and propylene glycol diglycidyl ether It is also possible to add an epoxy crosslinking agent such as) or a melamine crosslinking agent such as butoxy melamine. Adding a crosslinking agent increases the elasticity of the adhesive layer. In particular, if the elasticity of the pressure-sensitive adhesive layer is low when the pigment is added, it is easy to bring a color tone imbalance due to the collapse of the pressure-sensitive adhesive layer during lamination. As for the addition amount of a crosslinking agent, about 0.1-5 weight% is suitable with respect to an adhesive.

In addition, in this invention, silicone adhesive can also be used other than acrylic resin. In particular, the addition-reactive silicone pressure-sensitive adhesive causes less destruction of the cyanine pigment. The pressure-sensitive adhesive is composed of an organopolysiloxane including an alkenyl group and an organohydrogen polysiloxane including a SiH group, and an addition reaction occurs and hardens by a catalyst such as a platinum compound. Adhesion property can be adjusted by changing the compounding ratio of the organopolysiloxane containing an alkenyl group, and the organohydrogen polysiloxane containing a SiH group.

In addition, organic solvents that can be used for the preparation of the pressure-sensitive adhesives include methyl ethyl ketone (MEK), acetone, cyclohexanone, cyclopentanone, cyclopentanone, and ether compounds such as dioxolane, which are ketone compounds. Dioxane, dimethoxyethane and aromatic compounds, toluene and xylene are possible.

Such a pressure-sensitive adhesive may be included in an amount of 5 to 50% by weight with respect to the composition for producing the near-infrared absorbing layer, in order to impart proper adhesion in a range that does not interfere with the anti-reflection function or near-infrared absorption and color reproducibility of the present invention.

In another embodiment of the present invention, the optical film may have an antireflection layer formed on the other surface of the base film. Figure 3 schematically shows a cross section of an optical film in another embodiment of the present invention. In the optical film, the antireflection layer 30, the base film 10, and the near infrared absorbing layer 20 are sequentially stacked.

The antireflection layer 30 may have an average reflectance of 3% or less at a wavelength of 380 to 750 nm.

In an exemplary embodiment, the anti-reflection layer 30 may be formed of a first layer 31 having a refractive index of 1.55 to 2.4 and a second layer 32 having a refractive index of 1.35 to 1.50 on the other surface of the first layer.

In one embodiment, the first layer 31 includes 10 to 70 wt% of inorganic oxide particles having an average particle diameter of 100 nm or less, 10 to 30 wt% of a polymer resin, 5 to 20 wt% of a thermal or photocurable binder, and a residual amount of a solvent. Can be. In embodiments, the first layer 31 may be formed to a thickness in the range of 500 to 30,000 nm, and may have a thickness of 1,000 to 10,000 nm.

In an embodiment, the second layer 32 may be formed of a material having a refractive index of 1.35 to 1.50. Preferably it may include a fluororesin containing a hydroxyl group. In one embodiment, the second layer 32 may include a fluorine-containing copolymer having a hydroxyl group in a molecule, a polymerizable compound having an ethylenically unsaturated group, a thermal or photopolymerization initiator as a curing agent, and a solvent. In general, the thickness of the second layer 32 is in a range of 50 to 1,000 nm, and a value of 50 to 300 nm is best.

In addition, in order to improve color contrast, a pigment and carbon black may be included in the anti-reflection layer 30.

In another embodiment of the present invention, the optical film may further form an electromagnetic shielding film on the other surface of the near infrared absorption layer. 4 (a) and 4 (b) schematically illustrate the cross section of an optical film in another embodiment of the present invention. As shown in FIG. 4 (a), the optical film may include an antireflection layer 30, a base film 10, a near infrared ray absorbing layer 20, an adhesive layer 50, and an electromagnetic shielding film 40. Can be. In addition, when the near-infrared absorbing layer itself is a tacky adhesive near-infrared absorbing layer 20 ', as shown in FIG. 4 (b), the anti-reflection layer 30, the base film 10, the near-infrared absorbing layer 20, and the electromagnetic shielding film ( 40 may be sequentially stacked.

Another aspect of the invention relates to a display filter comprising the optical film. The display filter may be applied to a cathode-ray tube (CRT) display, a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescence display (ELD), or the like, and may be particularly preferably applied to a module for a PDP.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. Details that are not described herein will be omitted since the description can be inferred by those skilled in the art.

Example

Example  One

When the pigment is sufficiently dissolved by mixing 0.12 g of PDC 680 (the first pigment), Nippon Kayaku's pigment, and 0.003 g of TY 171 (the cyanine pigment, the second pigment), which is a pigment of Asahi Denka, with 8 g of methyl ethyl ketone. After stirring up to 17 g of Halshybrid IR-G 205, a binder resin of Nippon Shokubai Co., Ltd., was added thereto, followed by sufficiently stirring to prepare a coating solution. The prepared coating solution was coated on the opposite side of the antireflective layer of the transparent base material (Toyobo PET film A1550) having an antireflection layer and dried at 80 ° C. for 1 minute to obtain an optical film.

Example  2

When the pigment is sufficiently dissolved by mixing 0.12 g of PDC 680 (the first pigment), Nippon Kayaku's pigment, and 0.006 g of TY 171 (the cyanine pigment, the second pigment), which is a pigment of Asahi Denka, are mixed with 8 g of methyl ethyl ketone. After stirring up to 17 g of Halshybrid IR-G 205, a binder resin of Nippon Shokubai Co., Ltd., was added thereto, followed by sufficiently stirring to prepare a coating solution. The prepared coating solution was coated on the opposite side of the antireflective layer of the transparent base material (Toyobo PET film A1550) having an antireflection layer and dried at 80 ° C. for 1 minute to obtain an optical film.

Comparative Example  One

Nippon Kayaku's pigment, PDC 680 (primary pigment) 0.091g, is mixed with 8g of methyl ethyl ketone and stirred until the pigment is sufficiently dissolved, and then Halshybrid IR-G 205, binder resin of Nippon Shokubai. After 17 g was added, the solution was sufficiently stirred to prepare a coating solution. The prepared coating solution was coated on the opposite side of the antireflective layer of the transparent base material (Toyobo PET film A1550) having an antireflection layer and dried at 80 ° C. for 1 minute to obtain an optical film.

Comparative Example  2

0.25 g of CIR 1085 (primary dye), a pigment from Japan Carlit, was mixed with 8 g of methyl ethyl ketone, stirred until the pigment was sufficiently dissolved, and then Halshybrid IR-G 205, a binder resin of Nippon Shokubai. After 17 g was added, the solution was sufficiently stirred to prepare a coating solution. The prepared coating solution was coated on the opposite side of the antireflective layer of the transparent base material (Toyobo PET film A1550) having an antireflection layer and dried at 80 ° C. for 1 minute to obtain an optical film.

The composition of Comparative Examples 1-2 and Examples 1-2 are summarized in Table 1 below.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 First pigment PDC 680 2.4 2.4 1.8 - CIR 1085 - - - 4.9 Second pigment TY 171 0.06 0.12 - - bookbinder Halshybrid IR G 100 100 100 100

(Unit: solid weight part)

Experimental Example . Light transmittance  And Light reflectance  Measure

5 and FIG. 5 show the results of measuring the total light transmittance, the light transmittance, and the light reflectance of the optical film obtained in Examples 1-2 and Comparative Examples 1 and 2 using a spectrophotometer (Lamda 950 spectrophotometer manufactured by Perkin-Elmer). It is shown in 6, Figure 7 shows the visible light transmittance of the first pigment. In particular, the light minimum reflectance and the lowest reflectance wavelength in the specific wavelength region of 380 ~ 750nm are shown in Table 2. Color reproducibility was measured using a CS 1000 equipment.

Visible ray
Total light transmittance (%) NTSC contrast
Color recall 380nm ~ 750nm Primary dye visible light
Total light transmittance (%) Color recall (%) Lowest reflectance
(%) lowest
Reflectance wavelength
(nm) Example 1 75.7 80.3 1.2 637 86.4 Example 2 67.6 82.3 0.9 629 86.3 Comparative Example 1 88.6 77.1 1.2 638 88.6 Comparative Example 2 79.2 76.89 1.2 635 79.2

As shown in Table 2, Comparative Example 1 and Examples 1 to 2 of the present invention were applied to the visible light transmittance of the first type of one color of 82% or more, Comparative Example 2 is the visible light of the first type of visible light A transmittance of 82% or less was used. The color reproducibility of the comparative example 1 and the comparative example 2 was 80% or less. In Example 1 and Example 2, the color reproduction effect was improved to 80% or more, and the other characteristics were satisfied. As a result, the optical film according to the present invention is implemented by the anti-reflection function and color reproduction in one film at the same time, it can be confirmed that it is possible to prevent glare, not only to prevent the malfunction of the remote control, but also to improve the color reproduction ability. Could.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are in all respects illustrative and not restrictive.

Claims (18)

A first dye having a visible light total transmittance of 82% or more; And
A second pigment having a color correction function;
Including, the PDP module itself color gamut compared to NTSC is more than 80%,
The weight ratio of the first dye and the second dye is 1: 0.0001 to 0.5 optical film.

The optical film of claim 1, wherein the first dye has a near infrared ray transmittance of 20% or less.
The optical film of claim 1, wherein the second pigment has an absorption function in a wavelength region of 380 nm to 780 nm.
delete The optical film of claim 1, wherein the first pigment comprises at least one of a thiol nickel complex, a diimmonium compound, a polymethine compound, an anthraquinone compound, a phthalocyanine compound, and a naphthalocyanine compound. .
The optical film of claim 1, wherein the second dye comprises at least one of porphyrin-based, cyanine-based, and squarylium-based dyes.
The method of claim 6, wherein the second pigment further comprises at least one of an anthraquinone pigment, a perinone pigment, a methine pigment, a monoazo pigment and a disazo pigment. An optical film, characterized in that.
The optical film of claim 1, wherein the optical film has a visible light transmittance of 37% or more.
The optical film of claim 1, wherein the optical film has a visible light transmittance of 50 to 90%.
The method of claim 1, wherein the optical film comprises a base film and a near-infrared absorbing layer laminated on one surface of the base film, the near-infrared absorbing layer is formed from a composition comprising the first pigment and the second pigment. Optical film.
The optical film according to claim 10, wherein the composition comprises 0.01 to 5 parts by weight of the first pigment and 0.001 to 5 parts by weight of the second pigment, based on 100 parts by weight of the binder.
The optical film of claim 11, wherein the binder comprises at least one of melamine, urethane, epoxy, polyester, polyether, polyimide, silicone, and acrylic resins.
The optical film of claim 11, wherein the composition further comprises tin-doped indium oxide, antimonium-doped tin oxide, or a combination thereof.
The optical film of claim 11, wherein the composition further comprises at least one of a curing agent and a radical reactant.
The optical film of claim 10, wherein the optical film has an antireflection layer formed on the other surface of the base film.
The optical film of claim 15, wherein the anti-reflection layer comprises a first layer having a refractive index of 1.55 to 2.4 on a surface in contact with the base film and a second layer having a refractive index of 1.35 to 1.50 on the other surface of the first layer.
The optical film of claim 10, wherein the optical film further forms an electromagnetic shielding film on the other surface of the near infrared absorbing layer.
A display filter comprising the optical film of any one of claims 1 to 3 and 5 to 17.

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