KR102302953B1 - Oled display having member including ultraviolet absorbent - Google Patents

Abstract

The OLED display according to the present invention is characterized in that it includes a member including an ultraviolet absorber, wherein the ratio of absorbance for 400 nm light to absorbance for 420 nm light is 10 or more.
The OLED display according to the present invention can be manufactured through an ultraviolet curing system, and has excellent light resistance, luminance, and the like.

Description

OLED display provided with a member containing a ultraviolet absorber TECHNICAL FIELD

The present invention relates to an OLED display having a member comprising an ultraviolet absorber.

The organic light emitting display device (OLED display), which has recently been in the spotlight as a display device, uses an organic light emitting diode (OLED), so the response speed is fast and the contrast ratio, luminous efficiency, luminance, and viewing angle are excellent. There is an advantage that

In the conventional LCD process, since the organic film formation condition was high temperature, the degree of curing was high, so there was no problem in the performance required as an organic film such as chemical resistance and heat resistance of the organic film itself, but in the organic TFT process, flexible display, and OLED process, heat Since a substrate that is weak and difficult to withstand high temperatures is generally used, the conditions for forming an organic film used therefor must also be low temperature. In addition, the organic light emitting device tends to deteriorate at high temperatures in successive subsequent processes, and materials in the organic TFT process also exhibit weak characteristics at high temperatures.

Recently, as OLED is applied to outdoor displays and vehicle displays, excellent light resistance and heat resistance to ultraviolet rays are required.

Korean Patent Laid-Open No. 2009-0006558 relates to a UV absorber composition comprising a benzotriazole-based acrylic copolymer, and specifically, (A) a benzotriazole-based acrylic compound prepared by copolymerizing (A) a benzotriazole-based compound and (B) an acrylic compound. Disclosed is a UV absorber comprising a coalescence.

Korean Patent Application Laid-Open No. 2009-0089088 relates to a UV absorber containing a benzotriazole-based acrylic copolymer and a UV absorber composition for preparing the same, and specifically, in the UV absorber containing a benzotriazole-based compound, is expressed by Formula 1 a benzotriazole-based compound; an acrylic compound represented by Formula 2; and an acrylic compound represented by Chemical Formula 3; discloses a UV absorber comprising a benzotriazole-based acrylic copolymer prepared by copolymerizing the same.

However, the ultraviolet absorbers of the above documents do not have excellent absorption of ultraviolet rays in the 380 to 420 nm region, so it is somewhat difficult to secure light resistance.

Therefore, development of an OLED display capable of suppressing a decrease in luminance as well as excellent light resistance has been demanded.

Republic of Korea Patent Publication No. 2009-0006558 (2009.01.15.) Republic of Korea Patent Publication No. 2009-0089088 (2009.08.21.)

The present invention provides a light emitting characteristic by deformation of an OLED light emitting device by ultraviolet rays in a region of 380 to 420 nm from sunlight by having a member containing an ultraviolet absorber in which the ratio of absorbance to 400 nm light to absorbance to 420 nm light is 10 or more An object of the present invention is to provide an OLED display having excellent light resistance with little change and excellent luminance, particularly in the blue region of 420 to 450 nm.

An OLED display according to the present invention for achieving the above object is characterized in that it comprises a member including an ultraviolet absorber, wherein the ratio of absorbance for 400 nm light to absorbance for 420 nm light is 10 or more.

The OLED display having the member according to the present invention can be manufactured using a photocurable composition using ultraviolet rays in the vicinity of 365 nm region using existing materials and processes. It has the advantage of being excellent in light resistance by blocking. In addition, there is an advantage in that the luminance is excellent by preventing a phenomenon of absorbing ultraviolet rays in a region of 420 nm or more.

1 to 3 are diagrams showing optical spectra according to Examples 1 to 3;

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

In the present invention, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member is present between the two members.

In the present invention, when a part "includes" a certain component, this means that other components may be further included rather than excluding other components unless otherwise stated.

One aspect of the present invention relates to an OLED display having a member comprising an ultraviolet absorber, wherein the ratio of absorbance for 400 nm light to absorbance for 420 nm light is at least 10.

The member included in the OLED display has a ratio of absorbance for 400 nm light to absorbance for 420 nm light of 10 or more, specifically 10 or more and 100 or less, and more specifically 10 or more and 20 or less, so it can be manufactured through an ultraviolet curing process. It has the advantage of excellent light resistance and excellent luminance.

In one embodiment of the present invention, the ultraviolet absorber may include at least one compound selected from the group consisting of a compound of the following formula (1), a compound of the following formula (2), and a compound comprising a light absorbing structure (moiety) of the following formula (3) can

[Formula 1]

[Formula 2]

[Formula 3]

In Formula 1,

X is an electron withdrawing group (EWG),

In Formula 2,

R1 to R4 are each independently hydrogen, a C1 to C12 aliphatic hydrocarbon group or a halogen atom.

Specifically, R1 to R4 are hydrogen.

The electron withdrawing group is, for example, carbonyl (-C=O-), nitrile (-CN), nitro (-NO ₂ ), sulfuryl (-SO ₂ ), carboxyl (-COOH), etc. It may be one or more selected from, but is not limited thereto. Specifically, the electron-withdrawing group may be carboxyl.

The C1 to C12 aliphatic hydrocarbon group may include both a straight chain aliphatic hydrocarbon group, a branched chain aliphatic hydrocarbon group, a saturated aliphatic hydrocarbon group and an unsaturated aliphatic hydrocarbon group. For example, alkyl groups such as methyl group, ethyl group, normal-propyl group, iso-propyl group, normal-butyl group, sec-butyl group, iso-butyl group, ter-butyl group, pentyl group and hexyl group; an alkenyl group having a double bond such as styryl; and an alkynyl group having a triple bond such as an acetylene group, but is not limited thereto.

In another embodiment of the present invention, the light absorption structure represented by the formula (1) may be represented by the following formula (4).

[Formula 4]

In Formula 4,

R5 is hydrogen, a C1 to C12 aliphatic hydrocarbon group or a C6 to C20 aromatic hydrocarbon group.

The C6 to C20 aromatic hydrocarbon group includes, for example, monocyclic aromatic rings such as phenyl, biphenyl, and terphenyl, and polycyclic aromatic rings such as naphthyl, anthracenyl, pyrenyl, and perylenyl, but is limited thereto. it's not going to be

The light absorption structure represented by Formula 3 may be represented by Formula 5 below, but is not limited thereto.

[Formula 5]

In Formula 5, R6 to R8 are each independently hydrogen; or C1 to C12 alkyl which may be substituted with a carbonyl group, an ether group, a cyano group or an ester group.

Formula 5 may be represented by Formula 6, but is not limited thereto.

[Formula 6]

When the ultraviolet absorber according to the present invention contains at least one compound selected from the group consisting of the compound of Formula 1, the compound of Formula 2, and the compound having a light absorption structure of Formula 3, a member having excellent light resistance and luminance is manufactured There are advantages to being able to In particular, when the compound of Formula 1 and the compound of Formula 2 are included, there is an advantage in securing heat resistance.

Specifically, there is little change in light emitting characteristics due to the deformation of the OLED light emitting device by ultraviolet rays in the 380 to 420 nm region from sunlight, and an OLED display having excellent luminance in the blue region of 420 to 450 nm can be obtained.

The ultraviolet absorber that is commercially available may be used, or may be directly synthesized and used. For example, the ultraviolet absorber is described in European Journal of Medicinal Chemistry, 2016, vol. 123, p. 849 - 857, Journal of carbohydrate Chemistry, 2012, vol. 31, #8, it is ok to synthesize by referring to the method disclosed in p.620-633 and the like.

When the OLED display according to the present invention includes the UV absorber, it can be manufactured using a thermosetting system when manufacturing the device. There is an advantage that the luminance of the OLED display is excellent due to the high transmittance.

Specifically, the OLED display according to the present invention includes a member including an ultraviolet absorber, wherein the ratio of absorbance for 400 nm light to absorbance for 420 nm light is 10 or more, and the ultraviolet absorber has absorbance for 400 nm light ( Absorbance) to the ratio of absorbance to 420 nm light may be 10 or more.

In another embodiment of the present invention, the member may further include an ultraviolet absorber that absorbs UV in a wavelength region of 400 nm or less.

The UV absorber that may be additionally included in addition to the UV absorber selected from the group consisting of Chemical Formulas 1 to 3 may be used regardless of any material capable of absorbing UV wavelengths of 400 nm or less.

In general, a hindered amine light stabilizer is mixed with an ultraviolet absorber, but the hindered amine light stabilizer is simply a radical stabilizing agent and is not related to ultraviolet absorption, so it may be used or not used in the present invention. No big deal though.

For example, the ultraviolet absorber may be one or more selected from the group consisting of benzoxazinone-based, triazine-based, benzotriazole-based and benzophenone-based ultraviolet absorbers. Examples of commercially available UV absorbers include benzoxazinone-based CYASORB UV-3853S from Cytec; CYASORB UV-1164 from Cytec, TINUVIN 1577, TINUVIN P, TINUVIN 234, TINUVIN 326, TINUVIN 328, TINUVIN 329, TINUVIN 571, TINUVIN 400, TINUVIN 479; Benzotriazoles are Cibas' CYASORB UV-2337, CYASORB UV-5411, BASF's TINUVIN 360, TINUVIN 213, TINUVIN 99-2, TINUVIN 171, TINUVIN 328, TINUVIN 384-2, TINUVIN 900, TINUVIN 928, TINUVIN 1130, Songwon Industrial's SONGSORB 1000, SONGSORB 2340, SONGSORB 3200, SONGSORB 3260, SONGSORB 3270, SONGSORB 3280; Benzophenones include Cytec's CYASORB UV-9, CYASORB UV-24, CYASORB UV-531, Cibas' CHIMASSORB 81, and Songwon's SONGSORB 8100. Can be used.

When the member further includes an ultraviolet absorber that absorbs UV in the wavelength region of 400 nm or less, it is preferable to suppress a decrease in light resistance.

In another embodiment of the present invention, the member may be included in a window film, a polarizing plate, a touch panel, a transparent optical adhesive layer, a transparent optical adhesive layer, or an organic light emitting device.

In another embodiment of the present invention, the member may be a hard coating layer for a window film, an adhesive layer or adhesive layer for a polarizing plate, a transparent optical adhesive layer, a transparent optical adhesive layer, an insulating layer for a touch panel, or an overcoating layer for an organic light emitting device. .

In another embodiment of the present invention, the member may be a transparent optical adhesive layer, a transparent optical adhesive layer, or an adhesive layer for a polarizing plate.

The window film, the polarizing plate, the touch panel, the transparent optical adhesive layer, the transparent optical adhesive layer, and the organic light emitting device are not limited to other configurations, manufacturing methods, etc. as long as they include the member according to the present invention.

Specifically, the member may be prepared by a composition including a binder resin, a photopolymerizable compound, a photoinitiator, an additive, a solvent, etc. in addition to the ultraviolet absorber according to its use, and the binder resin, a photopolymerizable compound, a photoinitiator, The composition and composition of additives and solvents are not limited in the present invention.

For example, the window film may include a substrate and a hard coating layer provided on one surface of the substrate, and the hard coating layer may be the aforementioned member. The base film may be used without particular limitation as long as it is a transparent polymer film, for example, triacetyl cellulose, acetyl cellulose butyrate, ethylene-vinyl acetate copolymer, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, poly Ester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, polysulfone, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, The film may be formed of a polymer such as polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or polycarbonate. These polymers may be used alone or in combination of two or more.

The hard coating layer may be prepared using a known hard coating composition including a urethane (meth) acrylate-based compound, a polyfunctional (meth) acrylate-based compound, a photoinitiator, a solvent, and the like, but is not limited thereto. The hard coating layer may further include additives such as silica nanoparticles in a range that does not impair the object of the present invention.

The member may be included in the polarizing plate. Specifically, the polarizing plate includes the aforementioned member and a polarizer, and may further include a protective film provided on one surface of the polarizer, and may further include a known film such as an optical film in addition to the protective film.

Specifically, the polarizing plate may be a multilayer film in which one polarizer and a transparent protective film are laminated on at least one surface thereof, and may further include a known optically functional film if the member is provided. For example, it may further include an optical compensation film, a reflective polarization separation film, a retardation film, an anti-glare function additional film, an additional film treated with a surface reflection device, a reflective film, a transflective film, and the like, but is not limited thereto.

The polarizing plate may have a configuration and composition commonly used in the art, and the present invention does not limit the manufacturing method of the polarizing plate and the polarizer included in the polarizing plate.

For example, in the polarizer, a dichroic dye is adsorbed onto a stretched polymer film, and the polymer film constituting the polarizer is not particularly limited as long as the film can be dyed with a dichroic material, for example, iodine. Specifically, polyvinyl hydrophilic polymer films such as alcohol-based films, ethylene-vinyl acetate copolymer films, ethylene-vinyl alcohol copolymer films, cellulose films, and partially saponified films thereof; Alternatively, a polyene oriented film such as a dehydration-treated polyvinyl alcohol-based film or a dehydrochloric acid-treated polyvinyl alcohol-based film may be used. Among them, a polyvinyl alcohol-based film is preferable in that it is excellent in the effect of enhancing the uniformity of the degree of polarization in the plane, as well as the dyeing affinity to the dichroic material.

The polarizer may further include a polarizer protective film on at least one surface as needed, and as a usable protective film, a film excellent in transparency, mechanical strength, thermal stability, moisture shielding property, isotropy, etc. may be used. Specific examples include polyester-based resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, and polybutylene terephthalate; Cellulose resins, such as a diacetyl cellulose and a triacetyl cellulose; polycarbonate-based resin; acrylic resins such as polymethyl (meth)acrylate and polyethyl (meth)acrylate; styrenic resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin-based resins such as polyethylene, polypropylene, polyolefin having a cyclo-based or norbornene structure, and an ethylene-propylene copolymer; vinyl chloride-based resin; amide resins such as nylon and aromatic polyamide; imide-based resin; polyether sulfone-based resin; sulfone-based resins; polyether ether ketone resin; sulfide polyphenylene-based resin; vinyl alcohol-based resin; vinylidene chloride-based resin; vinyl butyral-based resin; allylate-based resin; polyoxymethylene-based resins; and a film composed of a thermoplastic resin such as an epoxy-based resin, and a film composed of a blend of the above-mentioned thermoplastic resins can also be used. In addition, a film made of a thermosetting resin or ultraviolet curable resin such as (meth)acrylic, urethane, acrylic urethane, epoxy, or silicone may be used.

Specifically, the member may be an adhesive layer or an adhesive layer for a polarizing plate, and more specifically, the member may be an adhesive layer for a polarizing plate.

The adhesive layer for the polarizing plate or the adhesive layer for the polarizing plate may be prepared using a composition including the ultraviolet absorber, a known photopolymerizable monomer, a photopolymerization initiator, a solvent, an additive, etc., but is not limited thereto, and in the present invention, the composition of the composition The composition, composition, etc. are not limited.

For example, the same contents as the transparent optical adhesive layer and the adhesive layer to be described later may be applied to the adhesive layer and the adhesive layer for the polarizing plate, but are not limited thereto.

The touch panel may include the member, the conductive pattern layer, and various known functional layers, but is not limited thereto.

The conductive pattern layer is a transparent conductive layer and may be formed of a metal oxide. The metal oxide is indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florintin oxide (FTO), zinc oxide ( ZnO), indium tin oxide-silver-indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc tin oxide-silver-indium zinc tin oxide (IZTO) -Ag-IZTO) and aluminum zinc oxide-silver-aluminum zinc oxide (AZO-Ag-AZO) may include at least one selected from the group consisting of, but is not limited thereto.

The member may be an insulating layer formed on the conductive pattern layer, but is not limited thereto. Specifically, the member may be an insulating layer for a touch panel. The member may be manufactured using a composition including a known binder resin, a photopolymerizable monomer, a photopolymerization initiator, a solvent, an additive, and the like, depending on uses other than the above-described ultraviolet absorber, but is not limited thereto. For example, the member may further include an organic insulating material such as a photocurable resin composition.

The member may be a transparent optical adhesive layer or a transparent optical adhesive layer. The transparent optical adhesive layer or the transparent optical adhesive layer includes the ultraviolet absorber. The transparent optical adhesive layer or the transparent optical adhesive layer may be prepared by using a composition including a known crosslinking agent, a photopolymerizable monomer, etc. in addition to an ultraviolet absorber, but the present invention is not limited thereto. For example, it may be prepared using a composition including a polyol, an acrylic monomer, an isocyanate-based crosslinking agent, and a photopolymerization initiator, and the composition may include a solvent and various additives as necessary.

In the present invention, the term "transparent" means that the transmittance of visible light is 70% or more or 80% or more. In addition, a case where the entire area is not transparent and the aperture ratio is 60% or more may be included.

The organic light emitting device includes an anode, a cathode, a light emitting layer, and a member according to the present invention, and may further include other known structures. Specifically, the organic light emitting device may further include a hole transport layer, an electron transport layer, a hole injection layer, an electron injection layer, an overcoat layer, and the like, and more specifically, the member may be an overcoat layer included in the organic light emitting device. .

The material of the overcoating layer may be any material capable of photopolymerization. For example, one selected from the group consisting of polyacrylic resins, polyurethane-based resins, polyolefin-based resins, polyester-based resins, epoxy-based resins, melamine-based resins, polyamide-based resins, polycarbonate-based resins, cellulose-based resins, and combinations thereof More than one type of material may be used, and the material of the overcoat layer is not particularly limited in the present invention.

In another embodiment of the present invention, the member may include an ultraviolet cured product of the photocurable composition including the ultraviolet absorber.

The photocurable composition may include the above-described binder resin, photopolymerizable compound, photopolymerization initiator, additive, solvent, etc., depending on the use of the member, and the member according to the present invention may apply the photocurable composition to ultraviolet rays, specifically 254 to It may be prepared by curing using ultraviolet rays in the 365nm region.

The thickness of the member according to the present invention can be appropriately set according to the use of the member, and the thickness of the member is not limited in the present invention. For example, the thickness of the member may be 1㎛ to 150㎛. Specifically, when the member is a hard coating layer, 5 μm to 15 μm, 15 μm to 25 μm in the case of an adhesive layer or an adhesive layer for a polarizing plate, 50 μm to 150 μm in the case of a transparent optical adhesive layer or an adhesive layer, and 1 in the case of an insulating layer It may be ㎛ to 5㎛, but is not limited thereto.

The ultraviolet absorbent may be included in an amount of 0.1 to 5 parts by weight, preferably 1 to 3 parts by weight, but is not limited thereto, based on 100 parts by weight of the total weight of the member. When the ultraviolet absorber is included within the above range, there is an advantage in that when the member is manufactured, the UV curing property is excellent, so that the processability is excellent, and the light resistance of the manufactured member is excellent.

In another embodiment of the present invention, an optical member for absorbing UV in a wavelength region of 400 nm or less may be further included on the member. Specifically, the OLED display may further include an optical member absorbing UV in a wavelength region of 400 nm or less on the member, and the optical member may include an ultraviolet absorber in order to absorb UV in a wavelength region of 400 nm or less. .

The UV absorber may be any UV absorber commonly used in the art without limitation as long as the optical member absorbs UV in a wavelength region of 400 nm or less.

For example, the UV absorber may be the same as the UV absorber that may be included in addition to the UV absorber selected from the group consisting of Formulas 1 to 3, but is not limited thereto.

When the OLED display further includes an optical member for absorbing UV in the wavelength region of 400 nm or less, it is possible to suppress the phenomenon of lowering light resistance, and there is an advantage that it is possible to provide an effect of blocking UV in the wavelength region of 400 nm or less .

The use of the optical member may be appropriately selected according to the purpose of use of the OLED display.

For example, when the member is an adhesive layer for a polarizing plate, the optical member may be a protective film, but is not limited thereto.

The OLED display according to the present invention has the advantage of excellent light resistance and luminance because it has a member including an ultraviolet absorber having a ratio of absorbance to 400 nm light to absorbance to 420 nm light of 10 or more. In addition, the OLED display according to the present invention has the advantage that it can be applied to the vehicle OLED display.

Hereinafter, examples will be given to describe the present specification in detail. However, the embodiments according to the present specification may be modified in various other forms, and the scope of the present specification is not to be construed as being limited to the embodiments described below. The embodiments of the present specification are provided to more completely explain the present specification to those of ordinary skill in the art. In addition, "%" and "part" indicating the content in the following are based on weight unless otherwise specified.

Preparation Example 1: Preparation of acrylic copolymer

Nitrogen gas is refluxed, and 90 parts by weight of n-butyl acrylate, 7 parts by weight of methacrylate, 2 parts by weight of 2-hydroxyethyl acrylate, 1 part by weight of acrylic acid in a 1L reactor equipped with a cooling device for easy temperature control. After adding the monomer mixture consisting of parts, 100 parts by weight of ethyl acetate as a solvent was added. Then, after purging with nitrogen gas for 1 hour to remove oxygen, the temperature was maintained at 62°C. After the mixture was uniformly mixed, 0.07 parts by weight of azobisisobutyronitrile (AIBN) was added as a reaction initiator and reacted for 8 hours to prepare an acrylic copolymer (weight average molecular weight of about 1 million).

Synthesis Example 1

European Journal of Medicinal Chemistry, 　 2016, 　 vol. 123, p. In the same manner as 849 - 857, an intermediate was synthesized, and the compound represented by Formula 6 was synthesized in the same manner as in the literature using alpha chloroester as a raw material.

Synthesis Example 2

Dissolve 10 g (0.05 mol) of pyrene in 100 g of dichloromethane, add TiCl ₄ (1 g) and 5.7 g (0.05 mol) of dichloromethoxymethane, stir at room temperature for 24 hours, and then add 200 mL of distilled water to remove impurities After extraction, the dichloromethane layer was distilled to obtain 10.7 g of pyrenecarboxaldehyde.

Preparation of adhesive sheet: Examples 1 to 3 and Comparative Examples 1 to 2

To 200 parts by weight (100 parts by weight of solid content) of the acrylic copolymer prepared in Preparation Example 1, 100 parts by weight of methyl ethyl ketone was added, and 2 parts by weight of Cor-L (Japan Polyurethane Industries, Ltd.) as a crosslinking agent and ultraviolet rays according to Table 1 below A pressure-sensitive adhesive composition was prepared by adding 1 part by weight of an absorbent. Thereafter, the silicone release agent was applied on the coated film, and dried at 100° C. for 1 minute to form a 25 μm pressure-sensitive adhesive layer. Thereafter, a release film was laminated on the pressure-sensitive adhesive layer to prepare a pressure-sensitive adhesive sheet.

After the prepared adhesive sheet was left at room temperature for 7 days to cure, the release films on both sides were removed, and the absorption spectrum from 200 nm to 600 nm was measured with a spectrophotometer (Shimadzu, UV-2450), and the results are shown in Table 1 and 1 to 3 are shown.

In addition, after the pressure-sensitive adhesive sheets according to Examples 2 and 3 were left in an oven at 100° C. for 150 hours, absorption spectra were measured to confirm heat resistance.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 UV absorber A compound represented by the formula (6) Pyrenecarboxaldehyde Diphenylanthracene
(Manufacturer: (TCI reagent) Sumisorb 300
(Manufacturer: Skitomer Chemicals) Dinitrosalicylic acid 400nm
(absorbance) 2.641 2.169 1.083 0.225 0.100 420nm
(absorbance) 0.243 0.146 0.092 0.087 0.084 400-420 (difference in absorbance) 2.398 2.023 0.991 0.138 0.016 Absorbance for 400nm Light / Absorbance for 420nm Light 10.87 14.85 11.77 2.58 1.19

Referring to Table 1 and FIGS. 1 to 3, the adhesive sheet according to the embodiment has an absorbance of 400 nm light/absorbance of 420 nm light of 10 or more, and a UV blocking effect and a luminance reduction suppression effect are expected. However, it can be seen that the adhesive sheet according to the comparative example has an absorbance for 400 nm light/absorbance for 420 nm light less than 3, and thus has a good UV blocking effect, but lacks a luminance reduction inhibitory effect.

In particular, referring to FIGS. 2 and 3 , in the case of the pressure-sensitive adhesive sheets according to Examples 2 and 3 containing the compound of Formula 1 and the compound of Formula 2, the UV absorption performance does not change after heat resistance evaluation, so it can be confirmed that the heat resistance is excellent. .

Claims (9)

An OLED display comprising a member comprising a compound of Formula 1 below or a compound of Formula 2 below, wherein the ratio of absorbance to 400 nm light to absorbance to 420 nm light is 10 or more:
[Formula 1]

[Formula 2]

In Formula 1,
X is an electron withdrawing group (EWG),
In Formula 2,
R1 to R4 are each independently hydrogen, a C1 to C12 aliphatic hydrocarbon group or a halogen atom. delete According to claim 1,
The compound represented by Formula 1 is an OLED display represented by Formula 4 below:
[Formula 4]

In Formula 4,
R5 is hydrogen, a C1 to C12 aliphatic hydrocarbon group or a C6 to C20 aromatic hydrocarbon group. According to claim 1,
The member is an OLED display further comprising a UV absorber that absorbs UV in a wavelength region of 400 nm or less. According to claim 1,
The member is an OLED display that is included in a window film, a polarizing plate, a touch panel, a transparent optical adhesive layer, a transparent optical adhesive layer, or an organic light emitting device. 6. The method of claim 5,
The member is an OLED display that is a hard coating layer for a window film, an adhesive layer or adhesive layer for a polarizing plate, an insulating layer for a touch panel, a transparent optical adhesive layer, a transparent optical adhesive layer, or an overcoating layer for an organic light emitting device. 7. The method of claim 6,
The member is an OLED display that is a transparent optical adhesive layer, a transparent optical adhesive layer, or an adhesive layer for a polarizing plate. According to claim 1,
The OLED display further comprising an optical member absorbing UV in a wavelength region of 400 nm or less on the member. 9. The method of any one of claims 1 and 3 to 8,
The member is an OLED display comprising an ultraviolet cured product of the photocurable composition including the ultraviolet absorber.

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