Optical member and display device including the same

Abstract

To provide an optical member whose change in light transmittance is small even after long exposure to ultraviolet rays under a condition that temperature repeatedly changes between normal temperature and high temperature.SOLUTION: An optical member and an optical display device including an adhesive layer, and a light transmission adjusting layer and a base material film formed in order on an upper surface of the adhesive layer are provided. The light transmission adjusting layer includes a (meth)acrylic copolymer and a mixture of dyes. The mixture of the dyes includes a first dye with a maximum absorption wavelength of 400 nm to 440 nm, a second dye with a maximum absorption wavelength of 480 nm to 520 nm, a third dye with a maximum absorption wavelength of 570 nm to 610 nm, and a fourth dye with a maximum absorption wavelength of 650 nm to 700 nm. The (meth)acrylic copolymer has a glass transition temperature of 50°C to 150°C and is an alicyclic group-containing (meth)acrylic copolymer. The (meth)acrylic copolymer is a copolymer of a monomer mixture containing 35 wt% to 70 wt% of the alicyclic group-containing (meth)acrylic monomer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an optical member and a display device including the same. [Background technology]

[0002] Light-emitting display devices, including organic light-emitting display devices, do not necessarily have to include a polarizing plate. However, incident external light may be totally reflected by the panel in the light-emitting display device, resulting in a decrease in screen quality. Therefore, light-emitting display devices generally include a polarizing plate on the top surface of the panel. The polarizing plate is composed of a polarizer and a retardation film. The polarizing plate contains a UV absorber, which also serves to prevent damage to the light-emitting element by external light.

[0003] On the other hand, in recent years, due to the trend toward thinner optical display devices, optical display devices that do not include polarizing plates (POL-LESS optical display devices) have been developed. In such display devices that do not include polarizing plates, the light-emitting elements are directly exposed to external light, which can make the light-emitting elements more susceptible to damage.

[0004] The background art of the present invention is described in Japanese Patent Publication No. 2015-010192. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2015-010192 Summary of the Invention [Problem to be solved by the invention]

[0006] One embodiment of the present invention provides an optical member that exhibits a small change in light transmittance at wavelengths of 400 nm to 600 nm even when exposed to ultraviolet light for a long period of time under conditions of repeated temperature changes between room temperature and high temperature.

[0007] One embodiment of the present invention provides an optical member that exhibits a reflectance of 6.5% to 9.5% when measured on a panel. [Means for solving the problem]

[0008] One embodiment of the present invention is an optical member.

[0009] The optical component includes an adhesive layer, and a light transmission adjusting layer and a base film formed in that order on the upper surface of the adhesive layer. The light transmission adjusting layer includes a (meth)acrylic copolymer and a dye mixture. The dye mixture includes a first dye having a maximum absorption wavelength of 400nm to 440nm, a second dye having a maximum absorption wavelength of 480nm to 520nm, a third dye having a maximum absorption wavelength of 570nm to 610nm, and a fourth dye having a maximum absorption wavelength of 650nm to 700nm. The (meth)acrylic copolymer has a glass transition temperature of 50°C to 150°C and is an alicyclic group-containing (meth)acrylic copolymer. The (meth)acrylic copolymer is a copolymer of a monomer mixture containing 35% by weight to 70% by weight of an alicyclic group-containing (meth)acrylic monomer.

[0010] One embodiment of the present invention is an optical display device.

[0011] An optical display device includes the optical member.

[0012] According to one embodiment of the present invention, even when exposed to ultraviolet rays for a long period of time under conditions of repeated temperature changes between room temperature and high temperature, the change in light transmittance at wavelengths of 400 nm to 600 nm is small, thereby improving the reliability of the display device. [Effects of the Invention]

[0013] According to one embodiment of the present invention, a reflectance of 6.5% to 9.5% can be achieved when measuring the panel, thereby providing an improvement in screen quality. [Brief explanation of the drawings]

[0014] [Figure 1]FIG. 1 is a cross-sectional view of an optical member according to an embodiment. [Figure 2] FIG. 2 shows the light transmittance of the optical member of Example 1. [Figure 3] FIG. 3 shows the light transmittance of the optical member of Comparative Example 1.

[0015] In Figures 2 and 3, the solid line indicates the initial light transmittance, and the dotted line indicates the light transmittance after the solar test. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments so that those skilled in the art can easily carry out the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments set forth herein.

[0017] The terms used herein are merely used to describe exemplary embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless otherwise clearly indicated in the context.

[0018] As used herein, the term "glass transition temperature of a homopolymer" may refer to the glass transition temperature (Tg) of a homopolymer of a monomer as the measurement target, measured using a DSC Discovery by TA Instruments, Inc. Specifically, the homopolymer of a monomer as the measurement target is heated to 180°C at a rate of 20°C / min, gradually cooled to -100°C, and then heated to 100°C at a rate of 10°C / min, and data on the endothermic transition curve is obtained, and the inflection point of the endothermic transition curve can be determined as the glass transition temperature.

[0019] In this specification, "light transmittance" means total light transmittance.

[0020] As used herein, the term "light-emitting element" includes organic and inorganic light-emitting elements, and may refer to elements containing light-emitting materials such as LEDs (light-emitting diodes), OLEDs (organic light-emitting diodes), QLEDs (quantum dot light-emitting diodes), and phosphors.

[0021] As used herein, "(meth)acrylic" means acrylic and / or methacrylic.

[0022] As used herein, the term "maximum absorption wavelength" refers to the wavelength at which the maximum absorbance is measured when measuring the absorbance of a 10 ppm dye solution in methyl ethyl ketone. The absorbance can be measured according to methods known to those skilled in the art.

[0023] When describing a range of values ​​in this specification, "X to Y" means "at least X and at most Y."

[0024] According to one embodiment, the optical member can be applied to an optical display device that does not include a polarizing plate including a polarizer, such as a light-emitting device display device.

[0025] According to one embodiment, the optical member exhibits a low change in light transmittance even when exposed to ultraviolet light for a long period of time under conditions of repeated temperature changes between room temperature and high temperature, which means that damage to the light emitting device due to external light can be prevented even when exposed to ultraviolet light for a long period of time under conditions of repeated temperature changes between room temperature and high temperature.

[0026] In this regard, the optical member has a light transmittance change ΔT(λ) of 3% or less as determined by the following equation 1. By achieving this range, even if exposed to ultraviolet rays for a long period of time, the light emitting element is less damaged, thereby improving the lifespan of the light emitting element display device. [Formula 1] △T(λ)=|T2(λ)-T1(λ)|

[0027] In Equation 1, T1(λ) is the light transmittance (unit: %) of the optical component at a wavelength λnm between 400nm and 585nm, and T2(λ) is the light intensity of 0.35W / m 2 This is the light transmittance (unit: %) of an optical component at a wavelength λnm between 400nm and 585nm after a total of 21 cycles of irradiating the optical component with light of a wavelength of 340nm for 4 hours at 25°C and then for 8 hours at 63°C.

[0028] In one embodiment, the value of Equation 1 may be a value at a wavelength of 400 nm.

[0029] In one embodiment, the value of Equation 1 may be a value at a wavelength of 490 nm.

[0030] In one embodiment, the value of Equation 1 may be a value at a wavelength of 585 nm.

[0031] In one embodiment, in Equation 1, ΔT(λ) may be 3% or less, for example, 2.9% to 1%, for example, 2.15% to 2.84%.

[0032] In one embodiment, in Equation 1, T1 may be 30% or less, for example, 10% to 27%.

[0033] In one embodiment, in Equation 1, T2 may be 30% or less, for example, 10% to 27%.

[0034] An optical member according to an embodiment will be described below.

[0035] The optical component includes an adhesive layer, and a light transmission adjusting layer and a base film formed in that order on the upper surface of the adhesive layer. The light transmission adjusting layer includes a (meth)acrylic copolymer and a dye mixture. The dye mixture includes a first dye having a maximum absorption wavelength of 400 nm to 440 nm, a second dye having a maximum absorption wavelength of 480 nm to 520 nm, a third dye having a maximum absorption wavelength of 570 nm to 610 nm, and a fourth dye having a maximum absorption wavelength of 650 nm to 700 nm. The (meth)acrylic copolymer has a glass transition temperature of 50°C to 150°C and is an alicyclic group-containing (meth)acrylic copolymer.

[0036] A release film may be further laminated on the other side of the adhesive layer to protect the adhesive layer.

[0037] The configuration of the optical member will be described in detail below.

[0038] adhesive layer The adhesive layer can adhere the optical member to the panel for an optical display device. The adhesive layer contains a cured product of the composition described below.

[0039] In one embodiment, the cured product may be a thermal cure of the composition.

[0040] The composition includes a UV absorber and a (meth)acrylic copolymer.

[0041] The UV absorber can absorb light in the wavelength range of 360 nm to 410 nm. Absorption of light in the wavelength range of 360 nm to 410 nm can effectively prevent damage to the light emitting element caused by external light.

[0042] In one embodiment, the UV absorber may be an indole-based UV absorber.

[0043] Indole-based UV absorbers have lower light transmittance not only in the wavelength region of 360 nm to 410 nm but also at wavelengths of 400 nm and 405 nm compared to other UV absorbers, and therefore can sufficiently suppress damage to light-emitting elements. In one embodiment, an optical component containing an indole-based UV absorber may have a light transmittance of 5% or less, for example, 0% to 5%, at a wavelength of 405 nm.

[0044] In one embodiment, the indole-based UV absorber can include a compound of general formula 1:

[0045] [ka]

[0046] In general formula 1, R 1 is hydrogen or a substituted or unsubstituted C1-C10 alkyl group, R 2 is hydrogen or a substituted or unsubstituted C6 to C20 aryl group, R 3 is hydrogen or a substituted or unsubstituted C1-C10 alkyl group, R 4 is hydrogen, a cyano group (CN), or a substituted or unsubstituted C1-C10 alkyl group; R 5 is a cyano group or -(C=O)OR 6 (At this time, R 6 is a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group).

[0047] Specifically, R 1 is a C1-C5 alkyl group, more specifically a methyl group, and R 2 is a C6-C10 aryl group, more specifically a phenyl group, and R 3 is hydrogen or a C1-C5 alkyl group, more specifically hydrogen, and R 4 is a cyano group, R 5is a cyano group or -(C=O)-OR 6 (At this time, R 6 is a substituted or unsubstituted C1 to C5 alkyl group.) More specifically, the compound of general formula 1 may include a compound of the following general formula 1-1 or 1-2.

[0048] [ka]

[0049] [ka]

[0050] The compound of general formula 1 has a melting point of 100°C or higher, specifically 140°C to 220°C, and may be in a solid phase at room temperature. The compound of general formula 1 may be synthesized by a conventional synthesis method known to those skilled in the art, or a commercially available product may be used.

[0051] The compound of general formula 1, at a concentration of 10 mg / L in chloroform (path 1 cm), has an absorbance at a wavelength of 390 nm of 0.8 AU or more, specifically 0.8 AU to 1.0 AU, and a maximum absorption wavelength greater than 390 nm, specifically greater than 390 nm but less than 400 nm, more specifically greater than 390 nm but less than 400 nm. By achieving this range, light with wavelengths of 420 nm or less, specifically 400 nm to 420 nm in ambient light, can be sufficiently absorbed to reduce transmittance and improve the stability of the light-emitting device against ambient light. The "maximum absorption wavelength" refers to the wavelength showing the maximum absorption peak, i.e., the wavelength showing the maximum absorbance in the wavelength-to-absorbance curve. "Absorbance" can be measured using conventional methods known to those skilled in the art.

[0052] The UV absorber may be contained in the adhesive layer in an amount of 0.1% by weight to 3% by weight. By satisfying this range, damage to the light emitting element can be sufficiently suppressed, and the problem of reduced light transmittance of the optical component caused by an excessive amount can be prevented. For example, the UV absorber may be contained in the adhesive layer in an amount of 0.3% by weight to 1.5% by weight.

[0053] The UV absorber may be contained in an amount of 0.3 to 3 parts by weight, for example, 0.3 to 1.5 parts by weight, relative to 100 parts by weight of the following (meth)acrylic copolymer. By satisfying this range, low light transmittance at a wavelength of 380 nm can be easily achieved, and if an excessive amount is contained, the hue value b* can be prevented from becoming too high.

[0054] In one embodiment, the adhesive layer may be a pressure sensitive adhesive.

[0055] The (meth)acrylic copolymer may be a non-carboxylic acid copolymer that does not have a carboxyl group. A (meth)acrylic copolymer that has a carboxyl group may reduce durability when adhered to a panel for an optical display device.

[0056] The (meth)acrylic copolymer may be a copolymer of a monomer mixture having a homopolymer glass transition temperature of −40° C. or lower and containing a (meth)acrylic monomer having an alkyl group, a monomer having a homopolymer glass transition temperature of 15° C. or higher, and a (meth)acrylic monomer having a hydroxyl group.

[0057] In one embodiment, the glass transition temperature of the homopolymer is −40° C. or lower, and the total amount of the (meth)acrylic monomer having an alkyl group, the monomer having a glass transition temperature of the homopolymer of 15° C. or higher, and the (meth)acrylic monomer having a hydroxyl group is 99 mol % or higher, for example, 99 mol % to 100 mol %, or even 100 mol %, based on the monomer mixture. By satisfying the above range, the effects of the optical member described above can be easily achieved.

[0058] By using a (meth)acrylic monomer having an alkyl group and a homopolymer glass transition temperature of -40°C or lower, the peel strength of the adhesive layer is increased and the adhesive layer matrix can be easily formed. For example, the monomer may be a monomer having a homopolymer glass transition temperature of -80°C to -40°C.

[0059] Preferably, the monomer may be a monomer that provides a homopolymer with a glass transition temperature of −80° C. to −50° C., for example, −80° C. to −60° C. By setting the temperature within the above range, the effects of the optical member described above can be easily achieved when combined with a (meth)acrylic monomer that provides a homopolymer with a high glass transition temperature, as described below.

[0060] The (meth)acrylic monomer may contain a (meth)acrylic acid ester having a linear or branched alkyl group having 1 to 8 carbon atoms at the ester moiety. Here, the "number of carbon atoms" refers only to the number of carbon atoms constituting the main chain of the alkyl group. Preferably, the number of carbon atoms may be 6 to 8.

[0061] For example, the (meth)acrylic monomer may include, but is not limited to, one or more of n-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, and iso-octyl (meth)acrylate. These may be used alone or in combination. Preferably, the (meth)acrylic monomer is 2-ethylhexyl (meth)acrylate.

[0062] The monomer may be contained in the monomer mixture at 65 mol% to 90 mol%, for example, 70 mol% to 90 mol%, or 70 mol% to 85 mol%. By satisfying the above range, the peel strength of the adhesive layer can be easily increased.

[0063] A monomer having a homopolymer glass transition temperature of 15° C. or higher may be essential for achieving the effects of the optical member described above.

[0064] Monomers having a homopolymer glass transition temperature of less than 15°C may cause a problem of deterioration of optical properties during solar tests. For example, the monomer may have a homopolymer glass transition temperature of -30°C to -10°C.

[0065] Preferably, the monomer may be a monomer having a homopolymer glass transition temperature of 15° C. to 260° C., for example, 15° C. to 210° C. By satisfying the above range, when combined with the above-mentioned (meth)acrylic monomer having a homopolymer glass transition temperature low, the effects of the optical member described above can be easily achieved.

[0066] The monomer may include one or more of a (meth)acrylic acid ester having an alkyl group or an alicyclic group at the ester moiety, and a maleimide having an alicyclic group or an aromatic group.

[0067] Preferably, the ester having an alkyl group may be tert-butyl (meth)acrylate or vinyl acetate. Preferably, the ester having an alicyclic group may include one or more of isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, and dicyclopentadienyl (meth)acrylate. Preferably, the maleimide having an alicyclic group may be N-cyclohexylmaleimide, etc. Preferably, the maleimide having an aromatic group may be phenylmaleimide.

[0068] The monomer may be contained in the monomer mixture at 5 mol % to 40 mol %, for example, 10 mol % to 30 mol %, or 15 mol % to 30 mol %. By satisfying the above range, the high peel strength of the adhesive layer is not affected, and the optical member can easily satisfy the above ranges for each of Formula 1 and Formula 2.

[0069] The (meth)acrylic monomer having a hydroxyl group can increase the peel strength of the adhesive layer by reacting with a curing agent. The monomer may contain, as the (meth)acrylic acid ester having a hydroxyl group, a (meth)acrylic acid ester having an alkyl group having 1 to 20 carbon atoms and having one or more hydroxyl groups at the ester moiety. For example, it may contain one or more of 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, and 1-chloro-2-hydroxypropyl (meth)acrylate. These may be contained alone or in combination of two or more.

[0070] The (meth)acrylic monomer having a hydroxyl group may be contained in the monomer mixture in an amount of 0.1 mol % to 5 mol %, for example, 0.5 mol % to 3 mol %, or 0.5 mol % to 1 mol %. By satisfying the above range, the mechanical strength of the adhesive layer can be maintained and the value described above for Formula 1 can be achieved.

[0071] The monomer mixture may not contain a (meth)acrylic acid ester having a long-chain alkyl group. If a (meth)acrylic acid ester having a long-chain alkyl group is contained, a problem may arise in which the cohesive strength and adhesive properties of the adhesive layer are not compatible. "A (meth)acrylic acid ester having a long-chain alkyl group" may refer to a (meth)acrylic acid ester having an alkyl group having 10 to 25 carbon atoms. Here, the "number of carbon atoms" refers only to the number of carbon atoms constituting the main chain of the long-chain alkyl group.

[0072] The glass transition temperature of the (meth)acrylic copolymer may be −60° C. to −10° C., for example, −60° C. to −30° C., −60° C. to −40° C., or −60° C. to −50° C. By satisfying the above range, the effects of the optical member described above can be easily achieved.

[0073] The weight-average molecular weight of the (meth)acrylic copolymer may be 500,000 g / mol to 1,500,000 g / mol, for example, 500,000 g / mol to 1,000,000 g / mol, or 600,000 g / mol to 1,000,000 g / mol. By satisfying this range, the effects of the optical member described above can be easily achieved.

[0074] The (meth)acrylic copolymer can be produced by polymerizing a monomer mixture using a conventional polymerization method. The polymerization method can include conventional methods known to those skilled in the art. For example, the (meth)acrylic copolymer can be produced by adding an initiator to the monomer mixture and then performing conventional copolymer polymerization, such as suspension polymerization, emulsion polymerization, or solution polymerization. The polymerization temperature can be 65°C to 70°C, and the polymerization time can be 6 to 8 hours. As the initiator, a conventional initiator containing an azo polymerization initiator and / or a peroxide such as benzoyl peroxide or acetyl peroxide can be used.

[0075] The composition may further comprise a curing agent.

[0076] The curing agent can react with the (meth)acrylic copolymer to provide release force.

[0077] The curing agent may include a heat curing agent, which can easily form an adhesive layer from the adhesive layer composition containing the UV absorber.

[0078] The curing agent may be contained in an amount of 0.1 to 5 parts by weight, for example, 0.05 to 2.5 parts by weight, relative to 100 parts by weight of the (meth)acrylic copolymer. By satisfying this range, the adhesive layer composition is crosslinked to exhibit adhesive properties, and a decrease in transparency due to use of an excessive amount can be prevented.

[0079] The thermal curing agent may include one or more of an isocyanate-based curing agent, a metal chelate-based curing agent, an epoxy-based curing agent, an aziridine-based curing agent, an amine-based curing agent, and a thermal polymerization initiator. For example, one or more of an isocyanate-based curing agent and a metal chelate-based curing agent may be included. These may be used alone or in combination.

[0080] The isocyanate curing agent is not particularly limited as long as it is a difunctional or higher, for example, difunctional to hexafunctional, isocyanate curing agent, but may include one or more of xylene diisocyanate (XDI) including m-xylene diisocyanate, methylene bis(phenyl isocyanate) (MDI) including 4,4'-methylene bis(phenyl isocyanate), naphthalene diisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, or an adduct thereof.

[0081] The metal chelate curing agent may include a coordination compound of a polyvalent metal such as aluminum, etc. For example, the metal chelate curing agent may include an aluminum chelate compound such as trisethylacetoacetate aluminum, ethylacetoacetate aluminum diisopropylate, or trisacetylacetonate aluminum.

[0082] The adhesive layer composition may contain a solvent. The solvent can improve the coating properties of the adhesive layer composition and inhibit the curing reaction of the adhesive layer composition itself. A typical solvent known to those skilled in the art can be used as the solvent. For example, the solvent can include one or more of methyl ethyl ketone, ethyl acetate, and toluene.

[0083] The adhesive layer composition may further include one or more of a silane coupling agent, a reworking agent, a curing catalyst, and an antistatic agent.

[0084] Silane coupling agents can provide adhesive layers with high adhesion to substrates such as glass. Silane coupling agents can include conventional silane coupling agents known to those skilled in the art. For example, the silane coupling agent can include, but is not limited to, one or more selected from the group consisting of silicon compounds having an epoxy structure, such as 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane; silicon compounds containing polymerizable unsaturated groups, such as vinyltrimethoxysilane, vinyltriethoxysilane, and (meth)acryloxypropyltrimethoxysilane; silicon compounds containing amino groups, such as 3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, and N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane; and 3-chloropropyltrimethoxysilane. The silane coupling agent may be contained in an amount of 0.001 to 5 parts by weight, specifically 0.001 to 3 parts by weight, relative to 100 parts by weight of the (meth)acrylic copolymer. By satisfying the above range, excellent durability and reliability can be achieved, and changes in components and physical properties over time can be reduced.

[0085] The rework agent enhances the reworkability of the adhesive layer and may comprise a polysiloxane oligomer or a mixture containing the same. The rework agent may be contained in an amount of 0.001 to 5 parts by weight, specifically 0.005 to 1 part by weight, per 100 parts by weight of the (meth)acrylic copolymer. By satisfying the above range, the physical properties of the adhesive layer are not affected and the reworkability can be enhanced.

[0086] The antistatic agent suppresses the generation of static electricity during rework of the adhesive layer and may contain a conventional antistatic agent. The antistatic agent may be contained in an amount of 0.001 to 5 parts by weight, specifically 0.1 to 5 parts by weight, per 100 parts by weight of the (meth)acrylic copolymer. By satisfying the above range, the physical properties of the adhesive layer are not affected and antistatic function can be provided.

[0087] Specifically, the curing catalysts include boron trifluoride tetrahydrofuran adduct (BF3-THF), boron trifluoride aniline adduct (BF3-Aniline), BF3·O(CH3)2 (boron trifluoride dimethyl etherate), and BF3·O(C2H5)2 (boron trifluoride diethyl etherate). The curing agent may include one or more of the following: boron compounds such as boron trifluoride etherates, exemplified by boron trifluoride etherates (e.g., triphenylphosphine, tributylphosphine, tri(p-methylphenyl)phosphine, tri(nonylphenyl)phosphine, triphenylphosphine / triphenylborate, and tetraphenylborate; tertiary amines such as triethylamine, benzyldiethylamine, and benzyldimethylamine (e.g., KH-30 and Kukdo); imidazole compounds such as 2-methylimidazole, 2-phenylimidazole, and 2-phenyl-4-methylimidazole; and sulfonic acid compounds such as paratoluenesulfonic acid, benzenedodecylsulfonic acid, naphthalenesulfonic acid, naphthalenedisulfonic acid, methanesulfonic acid, methanedisulfonic acid, and phenolsulfonic acid. The curing catalyst may be included in an amount of 0.01 to 5 parts by weight, specifically 0.05 to 2 parts by weight, per 100 parts by weight of the (meth)acrylic copolymer. By satisfying the above range, the effect of shortening the curing rate can be obtained.

[0088] The adhesive layer composition may further contain common additives. The additives may include antioxidants, tackifying resins, plasticizers, etc. The additives may be contained in an amount of 0.001 to 5 parts by weight, specifically 0.01 to 1 part by weight, per 100 parts by weight of the (meth)acrylic copolymer. By satisfying the above range, the physical properties of the adhesive layer are not affected and the additive effects can be obtained.

[0089] The viscosity of the adhesive layer composition at 25° C. may be 1,000 cPs to 4,000 cPs. By satisfying this range, the thickness of the adhesive layer can be easily adjusted, the occurrence of unevenness in the adhesive layer can be suppressed, and the coating surface can be made uniform.

[0090] The adhesive layer may have a thickness of 100 μm or less, specifically 5 μm to 50 μm. By satisfying the above range, the optical member can be used in an optical display device.

[0091] The adhesive layer can be produced by coating the adhesive layer composition to a predetermined thickness, drying it, and then treating it under constant temperature and humidity conditions of 25°C to 35°C and a relative humidity of 30% to 60%, but the method for producing the adhesive layer is not limited to this.

[0092] Light transmission adjustment layer

[0093] The light transmission control layer may be laminated between the adhesive layer and the substrate film to provide a color conversion effect. In this regard, the light transmission control layer includes a dye mixture including a first dye having a maximum absorption wavelength of 400 nm to 440 nm, a second dye having a maximum absorption wavelength of 480 nm to 520 nm, a third dye having a maximum absorption wavelength of 570 nm to 610 nm, and a fourth dye having a maximum absorption wavelength of 650 nm to 700 nm.

[0094] The first dye has a maximum absorption wavelength of 400 nm to 440 nm, and when included in the light transmission adjusting layer, it can reduce reflectance and exhibit an effect of improving screen quality. In one embodiment, the first dye may have a maximum absorption wavelength of 420 nm to 440 nm, or the maximum absorption wavelength may be 400, 405, 410, 415, 420, 425, 430, 435, or 440 nm.

[0095] The first dye may be a dialkoxy-substituted porphyrin dye, for example, the first dye may be a dye represented by the following general formula 2:

[0096] [ka]

[0097] The first dye may be contained in the light transmission adjusting layer at 0.001% by weight to 5% by weight, 0.1% by weight to 5% by weight, or 0.1% by weight to 2% by weight, for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, or 5% by weight. By satisfying the above range, the remaining dyes except for the first dye can be contained, which can provide the effects of increasing the transmittance and reducing the reflectance.

[0098] The second dye has a maximum absorption wavelength of 480 nm to 520 nm, and when included in the light transmission adjusting layer, it can reduce reflectance and exhibit an effect of improving screen quality. In one embodiment, the second dye may have a maximum absorption wavelength of 490 nm to 520 nm, for example, 480, 485, 490, 495, 500, 505, 510, 515, or 520 nm.

[0099] The second dye can be a BODIPY dye or a mixture containing a BODIPY dye. For example, the BODIPY dye can include a dye of the following general formula 3:

[0100] [ka]

[0101] The second dye may be contained in the light transmission adjusting layer at 0.001% by weight to 5% by weight, for example, 0.1% by weight to 5% by weight, or 0.1% by weight to 2% by weight. For example, the second dye may be contained in the light transmission adjusting layer at 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1 The dye may be contained in an amount of 0.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, or 5% by weight. By satisfying the above ranges, the remaining dyes excluding the second dye can be contained, thereby achieving the effects of increasing transmittance and reducing reflectance.

[0102] The third dye has a maximum absorption wavelength of 570 nm to 610 nm, for example, 570, 575, 580, 585, 590, 595, 600, 605, or 610 nm, and when contained in the light transmission adjusting layer, can reduce reflectance and exhibit an effect of improving screen quality.

[0103] The third dye may be a tetraazaporphyrin-based dye, a mixture containing a tetraazaporphyrin-based dye, or the like.

[0104] The third dye may be contained in the light transmission adjusting layer at 0.001% by weight to 5% by weight, for example, 0.1% by weight to 5% by weight, or 0.1% by weight to 2% by weight, for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, or 5% by weight. By satisfying the above range, the remaining dyes excluding the third dye can be contained, which can provide the effects of increasing the transmittance and reducing the reflectance.

[0105] The fourth dye has a maximum absorption wavelength of 650 nm to 700 nm, and when contained in the light transmission adjusting layer, it can reduce reflectance and improve screen quality.

[0106] The fourth dye may be a sulfonamide-substituted copper complex system, etc. For example, the sulfonamide-substituted copper complex dye may include a dye of the following general formula 4:

[0107] [ka]

[0108] The fourth dye may be contained in the light transmission adjusting layer at 0.001% by weight to 5% by weight, for example, 0.1% by weight to 5% by weight, or 0.1% by weight to 2% by weight. By satisfying the above range, the remaining dyes excluding the third dye can be contained, thereby achieving the effects of increasing transmittance and reducing reflectance.

[0109] The mixture of the first dye, the second dye, the third dye, and the fourth dye may be contained in the light transmission adjusting layer in an amount of 3% by weight to 15% by weight, for example, 3% by weight to 10% by weight. By satisfying the above range, the reflectance can be reduced, and the effect of improving the screen quality can be exerted.

[0110] On the other hand, the dye mixture may be decomposed when exposed to UV light for a long period of time under conditions of repeated temperature changes between room temperature and high temperature.

[0111] The light transmission adjusting layer contains a (meth)acrylic copolymer, and the (meth)acrylic copolymer has a glass transition temperature of 50°C to 150°C and is an alicyclic group-containing (meth)acrylic copolymer. If the glass transition temperature is 50°C or higher, decomposition of the dye can be prevented, and the effect of minimizing the rate of change in luminance and reflectance can be achieved. If the glass transition temperature is 150°C or lower, decomposition of the dye can be prevented, and the effect of minimizing the rate of change in luminance and reflectance can be achieved.

[0112] In one embodiment, the (meth)acrylic copolymer may be contained in the monomer mixture as a copolymer of a monomer mixture containing an alicyclic group-containing monomer at 35% to 70% by weight, 40% to 70% by weight, for example, 50% to 60% by weight, for example, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or 70% by weight. By satisfying the above range, the dye is protected and the effect of minimizing the rate of change in brightness and reflectance can be further improved.

[0113] The (meth)acrylic monomer having an alicyclic group may include a (meth)acrylic acid ester having a monocyclic or heterocyclic alicyclic group having 5 to 20 carbon atoms. According to one embodiment, the (meth)acrylic monomer having an alicyclic group may be a monofunctional monomer.

[0114] For example, the (meth)acrylic monomer having an alicyclic group may include one or more of cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, dicyclopentanyl (meth)acrylate, methylcyclohexyl (meth)acrylate, and dicyclopentenyl (meth)acrylate.

[0115] The monomer mixture may further contain a comonomer in addition to the (meth)acrylic monomer having an alicyclic group. The comonomer may be a comonomer whose homopolymer has a glass transition temperature of 50°C or higher, for example, 50°C to 150°C. By satisfying the above range, the glass transition temperature of the (meth)acrylic copolymer described above can be easily reached.

[0116] Any comonomer can be used without limitation as long as the glass transition temperature of the homopolymer thereof is 50°C or higher, for example, 50°C to 150°C.

[0117] In one embodiment, the comonomer may include a (meth)acrylic monomer having an alkyl group. For example, the (meth)acrylic monomer may include a (meth)acrylic acid ester having an alkyl group having 1 to 10 carbon atoms. For example, the (meth)acrylic monomer may include methyl (meth)acrylate.

[0118] The comonomer may be contained in the monomer mixture at 30% to 65% by weight, 30% to 60% by weight, for example, 40% to 50% by weight, for example, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, or 60% by weight. By satisfying the above range, the matrix of the light transmission adjusting layer can be easily formed.

[0119] According to one embodiment, the total amount of the (meth)acrylic monomer having an alicyclic group and the comonomer having a glass transition temperature of the homopolymer of 50°C or higher, for example, 50°C to 150°C, is 95% by weight or higher, for example, 95% by weight to 100% by weight, 98% by weight to 100% by weight, or even 100% by weight, based on the monomer mixture. By satisfying the above range, the effects of the optical member described above can be easily achieved.

[0120] The thickness of the light transmission adjusting layer may be 100 μm or less, specifically 1 μm to 50 μm. By satisfying the above range, the optical member can be used in optical display devices.

[0121] Base film

[0122] The substrate film is formed on the light transmission adjusting layer to protect the adhesive layer and the light transmission adjusting layer and to increase the mechanical strength of the optical element. In one embodiment, the substrate film may be formed directly on the light transmission adjusting layer. Here, "directly formed" means that there is no separate adhesive layer or bonding layer between the substrate film and the light transmission adjusting layer.

[0123] In one embodiment, the substrate film may have a light transmittance of 80% or more, for example, 90% to 99%. By satisfying this range, the optical paths of external and internal light are not affected during transmission, thereby improving light efficiency.

[0124] In one embodiment, the substrate film may have a light transmittance of 1% or less at a wavelength of 380 nm, for example, 0.1% to 1%.

[0125] The substrate film may include one or more optically clear protective films or coating layers.

[0126] When the substrate film is a protective film type, it may include a protective film formed of an optically transparent resin. The protective film may be formed by melting and extruding the resin. If necessary, a stretching process may be added. The resin may include one or more of cellulose ester-based resins such as triacetyl cellulose, cyclic polyolefin-based resins such as acyclic olefin polymers (COP), polycarbonate-based resins, polyester-based resins such as polyethylene terephthalate (PET), polyethersulfone-based resins, polysulfone-based resins, polyamide-based resins, polyimide-based resins, acyclic polyolefin-based resins, polyacrylate-based resins such as polymethyl methacrylate resins, polyvinyl alcohol-based resins, polyvinyl chloride-based resins, and polyvinylidene chloride-based resins.

[0127] When the substrate film has a protective coating layer, it can have good adhesion to the adhesive layer, transparency, mechanical strength, thermal stability, moisture blocking properties, and durability. In one embodiment, the protective coating layer for the substrate film can be formed from an active energy ray-curable resin composition including an active energy ray-curable compound and a polymerization initiator.

[0128] The active energy ray-curable compound may include one or more of a cationically polymerizable curable compound, a radically polymerizable curable compound, a urethane resin, and a silicone resin. The cationically polymerizable curable compound may be an epoxy compound having at least one epoxy group in the molecule, or an oxetane compound having at least one oxetane ring in the molecule. The radically polymerizable curable compound may be a (meth)acrylic compound having at least one (meth)acryloyloxy group in the molecule.

[0129] The thickness of the substrate film is 5 μm to 200 μm, specifically 30 μm to 120 μm, and in the case of a protective film type, the thickness may be 50 μm to 100 μm, and in the case of a protective coating layer type, the thickness may be 5 μm to 50 μm. By satisfying the above range, the optical member can be used in an optical display device.

[0130] A functional coating layer such as an anti-reflection layer may not be formed on one surface of the substrate film.

[0131] FIG. 1 is a cross-sectional view of an optical member according to an embodiment.

[0132] 1, the optical member includes an adhesive layer 100, a light transmission adjusting layer 200 disposed on the upper surface of the adhesive layer 100, and a base film 300, which are formed in this order. Although not shown in FIG. 1, a release film may be further formed on the lower surface of the adhesive layer 100.

[0133] According to one embodiment of the present invention, an optical display device is provided.

[0134] An optical display device includes the optical member.

[0135] In one embodiment, the optical display device can include an optical display panel and an optical member laminated on the optical display panel.

[0136] In one embodiment, the optical display device does not include a polarizer. Even if the optical display device does not include a polarizer, the optical member can replace the function of the polarizer, thereby preventing damage to the light-emitting element.

[0137] The optical display device may include, but is not limited to, a light emitting device display device such as a liquid crystal display device or an organic light emitting display device. [Example]

[0138] The present invention will be described in more detail with reference to preferred embodiments thereof below, which are merely examples of the present invention and should not be construed as limiting the present invention in any way.

[0139] Production Example 1: Preparation of (meth)acrylic copolymer Under a nitrogen stream, 50 g of toluene was added to a 500 mL reactor equipped with a cooling device for temperature control. 100 parts by weight of a monomer mixture containing the monomers listed in Table 1 below in the amounts listed in Table 1 below was added to the reactor. Nitrogen gas was blown into the monomer mixture for 30 minutes to remove oxygen from the reactor, replacing the oxygen inside with nitrogen, and the internal temperature of the reactor was maintained at 70°C. After uniformly stirring the monomer mixture, 0.06 parts by weight of V601 (dimethyl 2,2'-azobis(2-methylpropionate)) as an initiator and a chain extender were added. The internal temperature of the reactor was raised to 75°C and the reaction was carried out for 4 hours. After an additional 2 hours of reaction at 75°C, the reaction mixture was cooled to room temperature, and toluene was added to prepare a 35 wt% (meth)acrylic copolymer solution. The weight-average molecular weight and glass transition temperature of the prepared (meth)acrylic copolymer were measured by GPC and DSC analysis.

[0140] Preparation Examples 2 to 6 and 8: Preparation of (meth)acrylic copolymers

[0141] Except for changing the type and content of the monomer in the monomer mixture as shown in Table 1 below, and changing the content of the initiator or the reaction time, (meth)acrylic copolymers were prepared in the same manner as in Preparation Example 1. In Table 1 below, "-" means that the content of the corresponding component is 0 mol%.

[0142] Preparation Example 7 Instead of the (meth)acrylic copolymer, a methyl methacrylate homopolymer (LG Chemical Co., Ltd., IF850 NP) was used.

[0143] [Table 1]

[0144] *Abbreviations in Table 1 are as follows: MMA: Methyl methacrylate (Sigma-Aldrich, homopolymer Tg: 105°C) MA: methyl acrylate (Sigma-Aldrich, homopolymer Tg: 8°C) CHA: Cyclohexyl acrylate (TCI, homopolymer Tg: 19°C) IBXA: Isobornyl acrylate (Sigma-Aldrich, homopolymer Tg: 94°C) DCPA: dicyclopentanyl acrylate (TCI, homopolymer Tg: 120°C)

[0145] The components used in the following examples and comparative examples are as follows.

[0146] (A) (Meth)acrylic copolymer (Meth)acrylic copolymers of the production examples in Table 1

[0147] (B) Dye (B1) VP-40 (a porphyrin dye represented by the following chemical formula, maximum absorption wavelength: 431 nm) [ka] (B2) FDB-022 (Yamada Chemical Co., Ltd., structure undisclosed, maximum absorption wavelength: 493 nm) (B3) CD30 (py-EWG-substituted BODIPY dye represented by the following chemical formula, maximum absorption wavelength: 506 nm)

[0148] [ka]

[0149] (B4) FDG-004 (Yamada Chemical Co., Ltd., structure undisclosed, maximum absorption wavelength: 576 nm) (B5) AMC 581 (manufactured by AMC, structure undisclosed, maximum absorption wavelength: 581 nm) (B6) KIS-001 (Kyung In Yang Heng Co., Ltd., tetraazaporphyrin compound, maximum absorption wavelength: 593 nm) (B7) FDR-001 (Yamada Chemical Co., Ltd., structure undisclosed, maximum absorption wavelength: 604 nm) (B8) RP-Cu-01 (sulfonamide-substituted PC dye represented by the following chemical formula, maximum absorption wavelength: 676 nm)

[0150] [ka] RP-Cu-01

[0151] Example 1 The (meth)acrylic copolymer of Preparation Example 1 was dissolved in toluene at a concentration of 35% by weight. Dyes (B1) to (B8) were each dissolved in methyl ethyl ketone or toluene at a concentration of 1% to 5% by weight. The respective solutions were mixed in the amounts shown in Table 3 below based on the solid content to prepare compositions for light transmission controlling layers.

[0152] The prepared composition for the light transmission adjusting layer was applied to the lower surface of a substrate film (triacetyl cellulose film manufactured by Hyosung Co., Ltd., PG402S, thickness: 40 μm) at a predetermined thickness and dried at 120°C for 2 minutes to form a light transmission adjusting layer (thickness: 2.3 μm) on the lower surface of the substrate film.

[0153] Acrylic copolymer CI-247 (SOKEN, no carboxyl group) was mixed with UV absorber UA-3912 (Orient Chemical), isocyanate curing agent TD-75 (SOKEN), crosslinking catalyst Sn catalyst (DBTDL), adhesion promoter CK-500, and silane coupling agent A-50, and stirred for 20 minutes with a mechanical stirrer. The mixture was then degassed for 40 minutes to prepare a pressure-sensitive adhesive layer composition. The content of each component in the pressure-sensitive adhesive layer composition is shown in Table 2 below.

[0154] [Table 2]

[0155] The prepared adhesive layer composition was applied to one side of a release film (thickness: 38 μm) at a specified thickness, dried at 100°C for 4 minutes, then covered with a triacetyl cellulose film (thickness: 50 μm) and left to stand at 35°C and 45% relative humidity for 2 days to produce a release film-adhesive layer (thickness: 15 μm)-triacetyl cellulose film laminate.

[0156] The prepared adhesive layer alone was attached to the lower surface of the formed light transmission adjusting layer to prepare an optical member.

[0157] Examples 2 to 4 Optical members were prepared in the same manner as in Example 1, except that the type of (meth)acrylic copolymer in the composition for the light transmission adjusting layer was changed as shown in Table 3 below.

[0158] Comparative Examples 1 to 4 Optical members were prepared in the same manner as in Example 1, except that the type of (meth)acrylic copolymer in the composition for the light transmission adjusting layer was changed as shown in Table 4 below.

[0159] The physical properties of the optical members manufactured in the examples and comparative examples were evaluated in Tables 3 and 4 below, and the results are shown in Tables 3 and 4 below, and in FIGS.

[0160] (1) Color coordinates of optical components Using a light transmittance measuring device (JASCO UV-visible spectrophotometer V-650), the lightness L, hue value a*, and hue value b* of the optical member were measured for a D65 light source.

[0161] (2) Reflectance of optical components The optical member was attached to the mobile OLED panel via an adhesive layer, and the reflectance was measured in reflection mode and SCI mode using a spectrophotometer (Konica Minolta, CM-3600a).

[0162] (3) Expected luminous efficiency: [Estimated luminous efficiency] The luminous efficiency of the panels was predicted using the measured film transmittance spectra for the optical members produced in the examples and comparative examples. Specifically, the luminance ratio relative to a polarized film was calculated using the following formula, assuming the transmittance of a normal polarized film to be 50%.

[0163]

number

[0164] In the above formula, P(λ) is the OLED spectrum, and y(λ) is the spectrum of the example and comparative example.

[0165] (4) Initial light transmittance of optical components

[0166] The optical component was cut into a size of 25mm x 200mm and attached to a glass plate to prepare a test piece. The light transmittance of the test piece was measured from 300nm to 800nm ​​using a light transmittance measuring device (JASCO UV-Visible Spectrophotometer, V-650), and the light transmittance at 400nm, 490nm, and 585nm was obtained.

[0167] (5) Solar test The optical member was cut to a size of 25 mm x 200 mm and attached to a glass plate to prepare a test piece. The test piece was placed in a UV chamber and irradiated with UV light at a wavelength of 340 nm under the following conditions. Solar test conditions: Leave at 25°C for 4 hours, then expose to a wavelength of 340 nm and a light intensity of 0.35 W / m 2 A total of 21 cycles were performed, each cycle consisting of 8 hours of irradiation at 63°C (requiring a total of 250 hours).

[0168] The test specimen was then removed from the UV chamber and allowed to stand at room temperature for 30 minutes, after which the light transmittance was measured using the method described above. The difference in light transmittance ΔT before and after the solar test was calculated.

[0169] [Table 3]

[0170] [Table 4]

[0171] As shown in Table 3, the optical element of the present invention provided the panel with a reflectance of 6.5% to 9.5%, and even when exposed to ultraviolet light for a long period of time under conditions of repeated temperature changes between room temperature and high temperature, the change in light transmittance at wavelengths of 400 nm to 600 nm was small.

[0172] However, as shown in Table 4, although the optical element of the comparative example provides a panel with a reflectance of 6.5% to 9.5%, when exposed to ultraviolet light for a long period of time under conditions of repeated temperature changes between room temperature and high temperature, the change in light transmittance over the entire wavelength range of 400 nm to 600 nm was greater than that of the examples, and the change exceeded 3% at wavelengths of 490 nm and 585 nm.

[0173] Simple modifications or alterations of the present invention can be easily implemented by a person having ordinary skill in the art, and all such modifications and alterations can be considered to be included within the scope of the present invention.

Claims

1. The adhesive layer includes a light transmission adjusting layer and a substrate film formed in this order on the adhesive layer, the light transmission adjusting layer comprises a (meth)acrylic copolymer and a mixture of dyes, the dye mixture comprises a first dye having a maximum absorption wavelength of 400 nm to 440 nm, a second dye having a maximum absorption wavelength of 480 nm to 520 nm, a third dye having a maximum absorption wavelength of 570 nm to 610 nm, and a fourth dye having a maximum absorption wavelength of 650 nm to 700 nm; the (meth)acrylic copolymer has a glass transition temperature of 50°C to 150°C and is an alicyclic group-containing (meth)acrylic copolymer; The (meth)acrylic copolymer is a copolymer of a monomer mixture containing 35% by weight to 70% by weight of an alicyclic group-containing (meth)acrylic monomer.

2. 2. The optical member according to claim 1, wherein the (meth)acrylic monomer having an alicyclic group comprises a (meth)acrylic acid ester having a monocyclic or heterocyclic alicyclic group having 5 to 20 carbon atoms.

3. 3. The optical member according to claim 2, wherein the (meth)acrylic monomer having an alicyclic group includes at least one of cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, dicyclopentanyl (meth)acrylate, methylcyclohexyl (meth)acrylate, and dicyclopentenyl (meth)acrylate.

4. The optical member according to claim 1 , wherein the monomer mixture further contains a comonomer whose homopolymer has a glass transition temperature of 50° C. or higher.

5. The optical member according to claim 4 , wherein the comonomer comprises a (meth)acrylic monomer having an alkyl group.

6. 5. The optical member according to claim 4, wherein the total amount of the (meth)acrylic monomer having an alicyclic group and the comonomer having a glass transition temperature of 50°C or higher when forming the homopolymer is 95% by weight or more based on the weight of the monomer mixture.

7. The optical member according to claim 1 , wherein the first dye is a dialkoxy-substituted porphyrin dye.

8. The optical member according to claim 7 , wherein the first dye comprises a dye represented by the following chemical formula: 【Chemistry 1】

9. The optical member according to claim 1 , wherein the second dye is a BODIPY dye alone or a mixture containing a BODIPY dye.

10. The optical member according to claim 9 , wherein the BODIPY dye comprises a dye represented by the following chemical formula: 【Chemistry 2】

11. The optical member according to claim 1 , wherein the third dye is a tetraazaporphyrin-based dye or a mixture containing a tetraazaporphyrin-based dye.

12. The optical member according to claim 1 , wherein the fourth dye is a sulfonamide-substituted copper complex dye.

13. The optical member according to claim 12 , wherein the sulfonamide-substituted copper complex dye comprises a dye represented by the following chemical formula: 【Transformation 3】

14. In the light transmission adjusting layer, the first dye is present in an amount of 0.001% to 5% by weight; the second dye is 0.001% to 5% by weight, the third dye is 0.001% to 5% by weight, 2. The optical member according to claim 1, wherein the fourth dye is contained in an amount of 0.001% by weight to 5% by weight.

15. The optical member according to claim 1 , wherein the substrate film does not have an anti-reflection layer.

16. The optical member according to claim 1 , wherein the adhesive layer contains a UV absorber.

17. An optical display device comprising the optical member according to claim 1 .

18. 18. The optical display of claim 17, wherein the optical display does not include a polarizer.

Images