KR20200086699A - Organic electroluminescent display - Google Patents

Abstract

A display panel comprising an organic electroluminescent element, a circular polarizing plate disposed on the display panel, and at least one of the display panel and the circular polarizing plate has an ultraviolet absorbing layer comprising an ultraviolet absorber represented by formula (I), or An organic electroluminescent display device having an ultraviolet absorbing layer comprising an ultraviolet absorber represented by formula (I) between the display panel and the original polarizing plate. In the formula, R ¹¹ and R ¹² each independently represent a hydrogen atom or an alkyl group, etc., R ¹³ and R ¹⁴ each independently represent a hydrogen atom or an aliphatic group, etc., and R ¹⁵ and R ¹⁶ each independently represent a hydrogen atom. Or an alkyl group.

Description

Organic electroluminescent display

The present invention relates to an organic electroluminescent display device.

In an information-oriented society, the importance of a display device as a visual information transmission medium is increasing. As the display device, a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting display (OLED), a field effect display (FED) ), electrophoretic display (EPD), and the like are known. Among them, the organic electroluminescent display device has an advantage such as power saving, thinning, and high visibility, and is attracting attention.

Moreover, the light emitting layer used in the organic electroluminescent element of the organic electroluminescent display device is liable to be deteriorated by ultraviolet rays. When the light emitting layer is deteriorated, it leads to deterioration of characteristics such as luminance. For this reason, it has been studied to prevent deterioration of the light emitting layer by ultraviolet rays in the organic electroluminescent display device. For example, in Patent Documents 1 to 4, it is proposed to contain an ultraviolet absorber in an adjacent layer of a sealing agent used in a display panel including an organic electroluminescent element. In addition, Patent Document 5 discloses a display device provided with a polarizing member comprising a functional layer containing a dye that absorbs light in a wavelength range of 380 nm to 450 nm on the display panel.

On the other hand, Patent Document 6 discloses an invention relating to an ultraviolet absorber containing a specific benzodithiol compound.

Patent Document 1: Japanese Patent Application Publication No. 2000-223271 Patent Document 2: Japanese Patent Application Publication No. 2002-184572 Patent Document 3: Japanese Patent Application Publication No. 2009-037809 Patent Document 4: Japanese Patent Publication No. 2016-076441 Patent Document 5: Japanese Patent Application Publication No. 2017-198991 Patent Document 6: Japanese Patent Publication No. 2009-263616

However, according to the examination of the inventors, it was found that the organic electroluminescent display devices described in Patent Documents 1 to 5 did not sufficiently suppress the deterioration of characteristics such as luminance in long-term light irradiation, resulting in insufficient light resistance. . Also, the organic electroluminescent display device may be used under high temperature and high humidity. Even when an organic electroluminescent display device is used in such an environment, it is desired that characteristics such as luminance can be maintained over a long period of time.

In addition, since a highly reflective metal layer is used in the organic electroluminescent device, external light or the like is reflected from the metal layer, glare of the background is generated, and visibility and the like are likely to decrease. For this reason, it has been considered to provide a circular polarizing plate on the display panel to prevent these problems.

However, according to the examination of the inventors, it was found that the organic electroluminescent display device having a circular polarizing plate tends to be particularly remarkable for long-term high-temperature and high-humidity conditions, but deterioration in properties such as interlayer peeling and luminance in light irradiation. The reason for this is considered to be due to changes in molecular weight and hydrophilicity due to decomposition of organic materials in the display panel or the original polarizing plate caused by moist heat and light, acceleration of decomposition by retention of low-molecular organic compounds and gases produced by decomposition. In addition, Patent Document 6 discloses an invention relating to an ultraviolet absorber, but specifically, there is no description of an example used in an organic electroluminescent display device.

Accordingly, an object of the present invention is to provide an organic electroluminescent display device excellent in light resistance and heat resistance.

According to the examination of the inventors of the present invention, the organic electroluminescent display device having an ultraviolet absorbing layer comprising an ultraviolet absorber represented by the formula (I) described later has been found to be excellent in light resistance and heat and moisture resistance, and has led to the completion of the present invention. Therefore, the present invention provides the following.

<1> An organic electroluminescent display device comprising a display panel including an organic electroluminescent element and a circular polarizing plate disposed on the display panel,

At least one of the display panel and the original polarizing plate has an ultraviolet absorbing layer containing the ultraviolet absorber represented by formula (I), or has an ultraviolet absorbing layer containing the ultraviolet absorber represented by formula (I) between the display panel and the original polarizing plate. , An organic electroluminescent display device;

[Formula 1]

In the formula, R ¹¹ and R ¹² each independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group or an aryloxy group,

R ¹³ and R ¹⁴ each independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group,

R ¹¹ and R ¹² may combine with each other to form a ring,

R ¹³ and R ¹⁴ may combine with each other to form a ring,

R ¹⁵ and R ¹⁶ each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, or a sulfamoyl group .

<2> The organic electroluminescent display device according to <1>, wherein R ¹¹ and R ¹² in formula (I) are hydrogen atoms.

<3> The organic electroluminescent display according to <1> or <2>, wherein R ¹³ and R ¹⁴ in formula (I) are hydrogen atoms or an alkyl group.

<4> The compound according to any one of <1> to <3>, wherein R ¹⁵ and R ¹⁶ in formula (I) are a hydrogen atom, an alkyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, or an aryloxycarbonyl group. Organic electroluminescent display device.

<5> The organic electroluminescent display device according to any one of <1> to <4>, wherein the ultraviolet absorbing layer contains a polymer polymer.

<6> The polymer polymer is polyacrylic polymer, polyester polymer, polycarbonate polymer, polyimide polymer, polyacrylamide polymer, polyurethane polymer, epoxy polymer, cellulose polymer, silicone polymer, The organic electroluminescence display device according to <5>, which is at least one selected from polyvinyl alcohol-based polymers, polyvinylalkyl ether-based polymers, and polyvinylpyrrolidone-based polymers.

<7> The organic electroluminescent display device according to <5>, wherein the polymer polymer is at least one selected from polyester polymers and polyacrylic polymers.

<8> The organic electroluminescent display device according to <5>, wherein the polymer polymer is an adhesive.

<9> <1> to <8, having the ultraviolet absorbing layer between the display panel and the original polarizing plate, one surface of the ultraviolet absorbing layer in contact with the display panel, and the other surface of the ultraviolet absorbing layer in contact with the circular polarizing plate. > The organic electroluminescent display device in any one of the above.

<10> The organic electroluminescent display device according to any one of <1> to <8>, wherein the original polarizing plate includes the ultraviolet absorbing layer.

<11> The organic electroluminescent display device according to <10>, wherein the original polarizing plate has a polarizer, a retardation film, and the ultraviolet absorbing layer.

<12> The organic electroluminescent display device according to any one of <1> to <8>, wherein the display panel includes the ultraviolet absorbing layer.

<13> The organic electroluminescent display device according to <12>, wherein the display panel has an organic electroluminescent element, a capping layer, and the ultraviolet absorbing layer disposed between the organic electroluminescent element and the capping layer.

<14> The organic electroluminescent display device according to <12>, wherein the display panel has an organic electroluminescent element and a capping layer, and the capping layer is the ultraviolet absorbing layer.

ADVANTAGE OF THE INVENTION According to this invention, the organic electroluminescent display device excellent in light resistance and moisture heat resistance can be provided.

1 is a plan view illustrating one of pixels included in a display panel.
2 is a circuit diagram of the same pixel.
3 is a cross-sectional view schematically corresponding to line III-III' of FIG. 1.
4 is a schematic diagram showing an embodiment of an organic electroluminescent display device of the present invention.

Hereinafter, the content of the present invention will be described in detail.

In the description of the group (atomic group) in the present specification, the notation that does not describe substitution and unsubstitution includes a group having a substituent together with a group not having a substituent. For example, the "alkyl group" includes not only an alkyl group having no substituent (unsubstituted alkyl group) but also an alkyl group having a substituent (substituted alkyl group).

In the present specification, the numerical range indicated by using "~" means a range including the numerical values described before and after "~" as the lower limit and the upper limit.

In this specification, the weight average molecular weight and the number average molecular weight are defined as polystyrene conversion values by gel permeation chromatography (GPC) measurement.

<Organic electroluminescent display device>

The organic electroluminescent display device of the present invention is an organic electroluminescent display device comprising a display panel including an organic electroluminescent element and a circular polarizing plate disposed on the display panel,

At least one of the display panel and the original polarizing plate has an ultraviolet absorbing layer containing the ultraviolet absorber represented by formula (I), or has an ultraviolet absorbing layer containing the ultraviolet absorber represented by formula (I) between the display panel and the original polarizing plate. It is characterized by. Hereinafter, the ultraviolet absorber represented by Formula (I) is also called an ultraviolet absorber (I). Moreover, the ultraviolet absorbing layer containing the ultraviolet absorber represented by Formula (I) is also called ultraviolet absorbing layer (I).

The organic electroluminescent display device of the present invention has the above-described ultraviolet absorbing layer (I), so that even if light is irradiated to the organic electroluminescent display device over a long period of time, it is possible to suppress deterioration in luminance by suppressing performance degradation of the emissive layer. . It is presumed that the ultraviolet absorber (I) contained in the ultraviolet absorbing layer (I) has a characteristic that it is difficult to decompose even when the light is irradiated for a long period of time, so that irradiation of ultraviolet rays to the light emitting layer can be shielded over a long period of time. For this reason, the organic electroluminescent display device of this invention has excellent light resistance. In addition, the organic electroluminescent display device of the present invention has the above-described ultraviolet absorbing layer (I), so that even after the organic electroluminescent display device is exposed to high temperature and high humidity, performance degradation of the light emitting layer due to ultraviolet light is suppressed to reduce luminance. Can be suppressed. It is presumed that the ultraviolet absorber (I) contained in the ultraviolet absorbing layer (I) is difficult to decompose even under high temperature and high humidity. For this reason, the organic electroluminescent display device of this invention has excellent moisture and heat resistance. Further, even if the organic electroluminescent display device is exposed to high temperature and high humidity, the ultraviolet absorber (I) is difficult to decompose or the like, and thus the deterioration of the ultraviolet absorber layer (I) due to the decomposition of the ultraviolet absorber (I) can be suppressed. For this reason, even after being exposed to high temperature and high humidity, mechanical properties such as the strength of the ultraviolet absorbing layer (I), adhesion between the ultraviolet absorbing layer (I) and other layers, etc. can be maintained over a long period of time. For example, when the ultraviolet absorbing layer (I) is disposed between the display panel and the original polarizing plate, the adhesiveness between the display panel and the original polarizing plate can be maintained over a long period of time.

In addition, since the organic electroluminescent display device of the present invention has a circular polarizing plate on the display panel, it is possible to suppress external light reflection or the like by the circular polarizing plate, thereby suppressing glare of the background, etc., and thus has good visibility. Can be done with

In addition, the light emitting layer used in the display panel is often made of a material having low light resistance. In the manufacture of a display panel, a layer formed after formation of a light emitting layer such as a capping layer is often formed by curing a photocurable composition by irradiating ultraviolet rays or the like using a photocurable composition. When the display panel in the organic electroluminescent display device of the present invention comprises an ultraviolet absorbing layer (I) (e.g., having an ultraviolet absorbing layer (I) between the organic electroluminescent element and the capping layer, or a capping layer) In the case of the ultraviolet absorbing layer (I), etc.), it is also possible to suppress the irradiation of the ultraviolet light to the light emitting layer at the time of manufacture of the display panel. For this reason, it is easy to obtain an organic electroluminescent display device with higher luminance.

First, the ultraviolet absorbing layer (I) used in the organic electroluminescent display device of the present invention will be described.

In the organic electroluminescent display device of the present invention, the ultraviolet absorber layer (I) includes an ultraviolet absorber (ultraviolet absorber (I)) represented by formula (I).

[Formula 2]

In the formula, R ¹¹ and R ¹² each independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group or an aryloxy group,

R ¹³ and R ¹⁴ each independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group,

R ¹¹ and R ¹² may combine with each other to form a ring,

R ¹³ and R ¹⁴ may combine with each other to form a ring,

R ¹⁵ and R ¹⁶ are each independently a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, or a sulfamoyl group Shows.

In formula (I), R ¹¹ and R ¹² each independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group or an aryloxy group, and preferably a hydrogen atom, a halogen atom, an alkyl group or an aryl group, , More preferably a hydrogen atom, a halogen atom or an alkyl group, and particularly preferably a hydrogen atom for the reason that excellent light resistance and heat resistance to moisture are easily obtained.

Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

As for the carbon number of an alkyl group and an alkoxy group, 1-30 are preferable, 1-20 are more preferable, 1-15 are more preferable, 1-10 are especially preferable, and 1-7 are the most preferable. The alkyl group and the alkoxy group may be any of linear, branched and cyclic groups, preferably linear or branched, and more preferably linear. Moreover, the cyclic alkyl group and the alkyl group part of a cyclic alkoxy group may be a monocyclic cycloalkyl group or a polycyclic alkyl group (bicycloalkyl group, tricycloalkyl group, etc.). The alkyl group and the alkoxy group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

The carbon number of the aryl group and the aryloxy group is preferably 6 to 40, more preferably 6 to 30, more preferably 6 to 20, particularly preferably 6 to 15, and most preferably 6 to 12. The aryl group and aryloxy group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

In Formula (I), R ¹¹ and R ¹² may combine with each other to form a ring. The ring formed by combining R ¹¹ and R ¹² is preferably a 5 or 6 membered ring. The ring formed by bonding of R ¹¹ and R ¹² may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

In Formula (I), R ¹³ and R ¹⁴ each independently represent a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group.

As for carbon number of the aliphatic group represented by R ¹³ and R ¹⁴ , 1-30 are preferable, 1-20 are more preferable, 1-15 are more preferable, 1-10 are especially preferable, and 1-7 are the most preferable. Do. Examples of the type of the aliphatic group include an alkyl group, an alkenyl group, an alkynyl group and an aralkyl group, an alkyl group or an alkenyl group is preferable, and an alkyl group is more preferable. The alkyl group, alkenyl group, alkynyl group, and aralkyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

1-30 are preferable, as for carbon number of an alkyl group, 1-20 are more preferable, 1-15 are more preferable, 1-10 are especially preferable, and 1-7 are the most preferable. The alkyl group may be either linear, branched or cyclic, preferably linear or branched, and more preferably linear.

2-30 are preferable, as for carbon number of an alkenyl group, 2-20 are more preferable, 2-15 are more preferable, 2-10 are especially preferable, and 2-7 are the most preferable. The alkenyl group may be any of straight chain, branched and cyclic, preferably straight chain or branched, and more preferably straight chain.

As for the carbon number of an alkynyl group, 2-30 are preferable, 2-20 are more preferable, 2-15 are more preferable, 2-10 are especially preferable, and 2-7 are the most preferable. The alkynyl group may be either straight chain, branched or cyclic, preferably straight chain or branched, and more preferably straight chain.

7-30 are preferable, as for carbon number of an aralkyl group, 7-20 are more preferable, and 7-15 are more preferable. The alkyl portion of the aralkyl group is the same as the alkyl group. The aryl part of the aralkyl group is the same as the following aryl group.

An aryl group is mentioned as an aromatic group. The aromatic group preferably has 6 to 40 carbon atoms, more preferably 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms, particularly preferably 6 to 15 carbon atoms, and most preferably 6 to 12 carbon atoms. As the aryl group, a phenyl group and a naphthyl group are preferable, and a phenyl group is more preferable. The aryl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

It is preferable that the heterocycle in the heterocyclic group contains a 5-membered or 6-membered saturated or unsaturated heterocyclic ring. The heterocycle may be condensed with an aliphatic ring, an aromatic ring, or another heterocycle. Examples of the hetero atom constituting the heterocyclic ring include B, N, O, S, Se and Te, and N, O and S are preferred. It is preferable that the heterocycle has a free valence (monovalent) of its carbon atom (the heterocyclic group is bonded at the carbon atom). The preferred heterocyclic group has 1 to 40 carbon atoms, more preferably 1 to 30 carbon atoms, and even more preferably 1 to 20 carbon atoms. Examples of the saturated heterocycle in the heterocyclic group include pyrrolidine ring, morpholine ring, 2-bora-1,3-dioxolane ring and 1,3-thiazolidine ring. Examples of the unsaturated heterocyclic ring in the heterocyclic group include imidazole ring, thiazole ring, benzothiazole ring, benzoxazole ring, benzotriazole ring, benzoserenazole ring, pyridine ring, pyrimidine ring and quinoline ring. . The heterocyclic group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

In formula (I), R ¹³ and R ¹⁴ are each independently preferably a hydrogen atom, an aliphatic group or an aromatic group, more preferably a hydrogen atom or an aliphatic group, and hydrogen for the reason that excellent light resistance and heat resistance to moisture resistance are easily obtained. It is more preferably an atom or an alkyl group, and particularly preferably an alkyl group. Among them, R ¹³ and R ¹⁴ are each independently preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 15 carbon atoms, more preferably a straight chain alkyl group having 1 to 10 carbon atoms, It is most preferable that it is a 1-7 linear alkyl group.

In Formula (I), R ¹³ and R ¹⁴ may combine with each other to form a ring. The ring formed by combining R ¹³ and R ¹⁴ is preferably a 5, 6 or 7 membered ring. The ring formed by bonding of R ¹³ and R ¹⁴ may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

In formula (I), R ¹⁵ and R ¹⁶ are each independently a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, an arylsulfone It represents a diary or a sulfamoyl group, preferably a hydrogen atom, an alkyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, or an aryloxycarbonyl group, more preferably a hydrogen atom, an alkyl group, an acyl group or a carbamoyl group. It is particularly preferable that it is a hydrogen atom for the reason that it is easy to obtain excellent light resistance and heat and moisture resistance.

1-20 are preferable, as for carbon number of an alkyl group, 1-16 are more preferable, and 1-10 are more preferable. The alkyl group may be either linear, branched or cyclic, preferably linear or branched, and more preferably linear. The alkyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

The carbon number of the aryl group is preferably 6 to 30, more preferably 6 to 20, more preferably 6 to 15, and most preferably 6 to 12. As the aryl group, a phenyl group and a naphthyl group are preferable, and a phenyl group is more preferable. The aryl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

Examples of the heterocyclic group include the heterocyclic groups described by R ¹³ and R ¹⁴ described above. The heterocyclic group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

2-20 are preferable, as for carbon number of an acyl group, 2-16 are more preferable, and 2-10 are more preferable. The acyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

As for the carbon number of a carbamoyl group, 1-20 are preferable, 1-16 are more preferable, and 1-10 are more preferable. The carbamoyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

2-20 are preferable, as for carbon number of an alkoxycarbonyl group, 2-15 are more preferable, and 2-10 are more preferable. The alkoxycarbonyl group may be any of straight chain, branched and cyclic, preferably straight chain or branched, and more preferably straight chain. The alkoxycarbonyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

7-30 are preferable, as for carbon number of an aryloxycarbonyl group, 7-20 are more preferable, 7-15 are more preferable, and 7-12 are the most preferable. The aryloxycarbonyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

1-20 are preferable, as for carbon number of an alkyl sulfonyl group, 1-16 are more preferable, and 1-10 are more preferable. The alkyl sulfonyl group may be any of straight chain, branched and cyclic, preferably straight chain or branched, and more preferably straight chain. The alkylsulfonyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

The carbon number of the aryl sulfonyl group is preferably 6 to 30, more preferably 6 to 20, more preferably 6 to 15, and most preferably 6 to 12. The arylsulfonyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

0-20 are preferable, as for carbon number of a sulfamoyl group, 0-15 are more preferable, and 0-10 are more preferable. The sulfamoyl group may have a substituent. As a substituent, the group demonstrated by the substituent T mentioned later is mentioned.

(Substitution T)

The following groups are mentioned as a substituent T.

Halogen atom (eg, chlorine atom, bromine atom, iodine atom);

Alkyl group [Linear, branched, cyclic alkyl group. Specifically, a straight-chain or branched alkyl group (preferably a straight-chain or branched alkyl group having 1 to 30 carbon atoms, for example, a methyl group, ethyl group, n-propyl group, isopropyl group, t-butyl group, n-octyl group, Eicosyl group, 2-chloroethyl group, 2-cyanoethyl group, 2-ethylhexyl group), cycloalkyl group (preferably a cycloalkyl group having 3 to 30 carbon atoms, for example, cyclohexyl group, cyclopentyl group, 4-n -Dodecylcyclohexyl group), bicycloalkyl group (preferably, a bivalent alkyl group having 5 to 30 carbon atoms, i.e., one valence group having one hydrogen atom removed from a bicycloalkane having 5 to 30 carbon atoms. For example, bicyclo[1,2,2]heptein-2-yl group, bicyclo[2,2,2]octane-3-yl group), and tricyclic structures with many ring structures are also included. The alkyl group in the substituent described below (for example, an alkylthio group) also represents an alkyl group of the same concept.];

Alkenyl group [Straight, branched, fantasy alkenyl group. Specifically, a straight-chain or branched alkenyl group (preferably a straight-chain or branched alkenyl group having 2 to 30 carbon atoms, for example, a vinyl group, an allyl group, a propenyl group, a geranyl group, an oleyl group), a cycloalkenyl group (preferably For example, a cycloalkenyl group having 3 to 30 carbon atoms, that is, an atom obtained by removing one hydrogen atom of a cycloalkene having 3 to 30 carbon atoms is one group, for example, 2-cyclopenten-1-yl group, 2-cyclo Hexane-1-yl group), bicycloalkenyl group (preferably, a bicycloalkenyl group having 5 to 30 carbon atoms, ie, an atom obtained by removing one hydrogen atom of a bicycloalkene having one double bond) is one group. Examples include bicyclo[2,2,1]hepto-2-en-1-yl group, bicyclo[2,2,2]octo-2-en-4-yl group).];

Alkylyl group (preferably, a straight-chain or branched alkynyl group having 2 to 30 carbon atoms. For example, ethynyl group, propargyl group, trimethylsilyl ethanyl group;

An aryl group (preferably an aryl group having 6 to 30 carbon atoms. For example, a phenyl group, p-tolyl group, naphthyl group, m-chlorophenyl group, o-hexadecane oil aminophenyl group);

Heterocyclic group (preferably a group in which one hydrogen atom is removed from a 5- or 6-membered aromatic or non-aromatic heterocyclic compound is a group, and more preferably, a 5 or 6-membered aromatic heterocycle having 3 to 30 carbon atoms. Ventilation, for example, 2-furyl group, 2-thienyl group, 2-pyrimidinyl group, 2-benzothiazolyl group);

Cyano group;

Hydroxyl groups;

Nitrogi;

Carboxyl group;

Alkoxy groups (preferably straight-chain or branched alkoxy groups having 1 to 30 carbon atoms. For example, methoxy groups, ethoxy groups, isopropoxy groups, t-butoxy groups, n-octyloxy groups, 2-methoxy groups Methoxy group);

Aryloxy group (preferably, aryloxy group having 6 to 30 carbon atoms. For example, phenoxy group, 2-methylphenoxy group, 4-t-butylphenoxy group, 3-nitrophenoxy group, 2-tetradecane oil Aminophenoxy group);

Silyloxy group (preferably, a silyloxy group having 3 to 20 carbon atoms. For example, trimethylsilyloxy group, t-butyldimethylsilyloxy group);

Heterocyclic oxy group (preferably, heterocyclic oxy group having 2 to 30 carbon atoms. For example, 1-phenyltetrazol-5-oxy group, 2-tetrahydropyranyloxy group);

Acyloxy group (preferably formyloxy group, alkylcarbonyloxy group having 2 to 30 carbon atoms, arylcarbonyloxy group having 6 to 30 carbon atoms. For example, formyloxy group, acetyloxy group, pivaloyloxy group, stearo Monooxy group, benzoyloxy group, p-methoxyphenylcarbonyloxy group);

Carbamoyloxy group (preferably a carbamoyloxy group having 1 to 30 carbon atoms. For example, N,N-dimethylcarbamoyloxy group, N,N-diethylcarbamoyloxy group, morpholinocarbonyloxy group, N, N-di-n-octylaminocarbonyloxy group, Nn-octylcarbamoyloxy group);

An alkoxycarbonyloxy group (preferably, an alkoxycarbonyloxy group having 2 to 30 carbon atoms. For example, methoxycarbonyloxy group, ethoxycarbonyloxy group, t-butoxycarbonyloxy group, n-octylcarbonyloxy group);

Aryloxycarbonyloxy group (preferably, aryloxycarbonyloxy group having 7 to 30 carbon atoms. For example, phenoxycarbonyloxy group, p-methoxyphenoxycarbonyloxy group, pn-hexadecyloxyphenoxycarbonyloxy Time);

Amino groups (preferably amino groups, alkylamino groups having 1 to 30 carbon atoms, anilino groups having 6 to 30 carbon atoms. For example, amino groups, methylamino groups, dimethylamino groups, anilino groups, N-methyl-anilino groups, Diphenylamino group);

Acylamino group (preferably, formylamino group, alkylcarbonylamino group having 1 to 30 carbon atoms, arylcarbonylamino group having 6 to 30 carbon atoms. For example, formylamino group, acetylamino group, pivaloylamino group, lauroylamino group, Benzoylamino group, 3,4,5-tri-n-octyloxyphenylcarbonylamino group);

Aminocarbonylamino group (preferably, aminocarbonylamino group having 1 to 30 carbon atoms. For example, carbamoylamino group, N,N-dimethylaminocarbonylamino group, N,N-diethylaminocarbonylamino group, parent Polynocarbonylamino group);

Alkoxycarbonylamino group (preferably an alkoxycarbonylamino group having 2 to 30 carbon atoms. For example, methoxycarbonylamino group, ethoxycarbonylamino group, t-butoxycarbonylamino group, n-octadecyloxycarbonylamino group , N-methyl-methoxycarbonylamino group);

Aryloxycarbonylamino group (preferably, aryloxycarbonylamino group having 7 to 30 carbon atoms. For example, phenoxycarbonylamino group, p-chlorophenoxycarbonylamino group, mn-octyloxyphenoxycarbonylamino group) ;

Sulfamoylamino group (preferably sulfamoylamino group having 0 to 30 carbon atoms. For example, sulfamoylamino group, N,N-dimethylaminosulfonylamino group, N-n-octylaminosulfonylamino group);

Alkyl or arylsulfonylamino group (preferably alkylsulfonylamino group having 1 to 30 carbon atoms, arylsulfonylamino group having 6 to 30 carbon atoms. For example, methylsulfonylamino group, butylsulfonylamino group, phenylsulfonylamino group, 2 ,3,5-trichlorophenylsulfonylamino group, p-methylphenylsulfonylamino group);

Mercapto group;

Alkylthio groups (preferably, alkylthio groups having 1 to 30 carbon atoms. For example, methylthio, ethylthio, n-hexadecylthio);

Arylthio (preferably arylthio having 6 to 30 carbon atoms. For example, phenylthio, p-chlorophenylthio, m-methoxyphenylthio);

Heterocyclic thio group (preferably a heterocyclic thio group having 2 to 30 carbon atoms. For example, 2-benzothiazolylthio, 1-phenyltetrazol-5-ylthio);

Sulfamoyl group (preferably sulfamoyl group having 0 to 30 carbon atoms. For example, N-ethyl sulfamoyl group, N-(3-dodecyloxypropyl) sulfamoyl group, N,N-dimethylsulfamoyl group , N-acetyl sulfamoyl group, N-benzoyl sulfamoyl group, N-(N'-phenylcarbamoyl) sulfamoyl group);

Sulfo groups;

Alkyl or arylsulfinyl groups (preferably, alkylsulfinyl groups having 1 to 30 carbon atoms, arylsulfinyl groups having 6 to 30 carbon atoms, for example, methylsulfinyl group, ethylsulfinyl group, phenylsulfinyl group, p-methylphenylsulfinyl group);

Alkyl or arylsulfonyl groups (preferably, alkylsulfonyl groups having 1 to 30 carbon atoms, arylsulfonyl groups having 6 to 30 carbon atoms, for example, methylsulfonyl group, ethylsulfonyl group, phenylsulfonyl group, p-methylphenylsulfonyl group);

An acyl group (preferably a formyl group, an alkylcarbonyl group having 2 to 30 carbon atoms, an arylcarbonyl group having 7 to 30 carbon atoms, a heterocyclic carbonyl group bonded to a carbonyl group with a carbon atom having 4 to 30 carbon atoms, for example, acetyl Group, pivaloyl group, 2-chloroacetyl group, stearoyl group, benzoyl group, pn-octyloxyphenylcarbonyl group, 2-pyridylcarbonyl group, 2-furylcarbonyl group);

Aryloxycarbonyl group (preferably, aryloxycarbonyl group having 7 to 30 carbon atoms. For example, phenoxycarbonyl group, o-chlorophenoxycarbonyl group, m-nitrophenoxycarbonyl group, pt-butylphenoxy Carbonyl group);

An alkoxycarbonyl group (preferably an alkoxycarbonyl group having 2 to 30 carbon atoms. For example, methoxycarbonyl group, ethoxycarbonyl group, t-butoxycarbonyl group, n-octadecyloxycarbonyl group);

Carbamoyl groups (preferably carbamoyl groups having 1 to 30 carbon atoms. For example, carbamoyl groups, N-methylcarbamoyl groups, N,N-dimethylcarbamoyl groups, N,N-di-n- Octylcarbamoyl group, N-(methylsulfonyl) carbamoyl group);

Aryl or heterocyclic azo group (preferably an aryl azo group having 6 to 30 carbon atoms, a heterocyclic azo group having 3 to 30 carbon atoms. For example, phenyl azo group, p-chlorophenyl azo group, 5-ethylthio-1,3,4 -Thiadiazole-2-yl azo);

Imide group (preferably, N-succinimide group, N-phthalimide group);

Phosphino group (preferably, a phosphino group having 2 to 30 carbon atoms. For example, dimethylphosphino group, diphenylphosphino group, methylphenoxyphosphino group)

Phosphinyl group (preferably a phosphinyl group having 2 to 30 carbon atoms. For example, a phosphinyl group, a dioctyloxyphosphinyl group, a diethoxyphosphinyl group);

Phosphinyloxy group (preferably a phosphinyloxy group having 2 to 30 carbon atoms. For example, diphenoxyphosphinyloxy group, dioctyloxyphosphinyloxy group);

Phosphinylamino group (preferably a phosphinylamino group having 2 to 30 carbon atoms. For example, dimethoxyphosphinylamino group, dimethylaminophosphinylamino group);

A silyl group (preferably a silyl group having 3 to 30 carbon atoms. For example, trimethylsilyl group, t-butyldimethylsilyl group, phenyldimethylsilyl group).

Among the groups exemplified above, for a group having a hydrogen atom, one or more hydrogen atoms may be substituted with the above substituent T. Examples of such a functional group include an alkylcarbonylaminosulfonyl group, an arylcarbonylaminosulfonyl group, an alkylsulfonylaminocarbonyl group, and an arylsulfonylaminocarbonyl group. As a specific example, a methylsulfonylaminocarbonyl group, p-methylphenylsulfonylaminocarbonyl group, acetylaminosulfonyl group, benzoylaminosulfonyl group, etc. are mentioned.

The following compounds are mentioned as a specific example of ultraviolet absorber (I).

[Formula 3]

[Formula 4]

The ultraviolet absorber (I) can be synthesized by referring to the synthesis method described in Japanese Patent Application Laid-open No. 2009-263617.

The ultraviolet absorber (I) is preferably a compound that absorbs light having a wavelength of 370 nm or more and 450 nm or less, and more preferably a compound that absorbs light having a wavelength of 370 nm or more and 410 nm or less. Moreover, it is preferable that a ultraviolet absorber (I) is a compound which has a maximum absorption wavelength in the range of wavelength 370 nm or more and 450 nm or less, and it is more preferable that it is a compound which has a maximum absorption wavelength in the range of wavelength 370 nm or more and 410 nm. Moreover, when the molar extinction coefficient at the maximum absorption wavelength is A, the ultraviolet absorber (I) preferably has a spectral characteristic that the molar extinction coefficient at the wavelength of (maximum absorption wavelength +50 nm) is 0.1 A or less. Do.

The content of the ultraviolet absorber (I) in the ultraviolet absorber layer (I) is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, and more preferably 0.1% by mass or more, for the reason that superior light resistance is easily obtained. desirable. Moreover, the upper limit of the content of the ultraviolet absorber (I) in the ultraviolet absorber layer (I) is preferably 50% by mass or less, and more preferably 10% by mass or less, because it is easy to ensure sufficient light transmittance.

The ultraviolet absorbing layer (I) may contain only one type of ultraviolet absorber (I), or may contain two or more types. When only one type of ultraviolet absorber (I) is included, more excellent light resistance and heat and moisture resistance are likely to be obtained. When 2 or more types of ultraviolet absorbers (I) are included, the effect of absorbing ultraviolet rays in a wider wavelength range can be expected.

The ultraviolet absorber layer (I) may further contain ultraviolet absorbers (hereinafter also referred to as other ultraviolet absorbers) other than the ultraviolet absorber (I). As other ultraviolet absorbers, benzotriazole ultraviolet absorbers, benzophenone ultraviolet absorbers, salicylic acid ultraviolet absorbers, salicylate ultraviolet absorbers, cyanoacrylate ultraviolet absorbers, cinnamate ultraviolet absorbers, oxanilide ultraviolet absorbers , Polystyrene-based ultraviolet absorbers, polyferrocenylsilane-based ultraviolet absorbers, metain-based ultraviolet absorbers, azomethine-based ultraviolet absorbers, triazine-based ultraviolet absorbers, p-aminobenzoic acid-based ultraviolet absorbers, cinnamic acid-based ultraviolet absorbers, urocanic acid-based ultraviolet absorbers Can be lifted.

The content of the other ultraviolet absorber in the ultraviolet absorbing layer (I) is preferably 50% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less. Moreover, it is also preferable that the ultraviolet absorber layer (I) does not substantially contain other ultraviolet absorbers. The fact that the ultraviolet absorber layer (I) is substantially free of other ultraviolet absorbers means that the content of the other ultraviolet absorbers in the ultraviolet absorber layer (I) is 0.1% by mass or less, and preferably 0.05% by mass or less. It is more preferable not to.

The ultraviolet absorbing layer (I) may contain a polymer polymer from the viewpoint of film forming properties and the like. Moreover, since the ultraviolet absorbing layer (I) contains a polymer polymer, the ultraviolet absorbing layer (I) can also be preferably used as an adhesive layer or the like. Examples of polymer polymers include polyacrylic polymers, polyester polymers, polycarbonate polymers, polyimide polymers, polyacrylamide polymers, polyurethane polymers, epoxy polymers, cellulose polymers, silicone polymers, and polyvinyl polymers. And alcohol-based polymers, polyvinylalkyl ether-based polymers, and polyvinylpyrrolidone-based polymers. Of these polymer polymers, polyester polymers, polyacrylic polymers, and the like have properties that are easily hydrolyzed under acidic conditions. Here, although acid may be generated as a hydrolyzate of the ultraviolet absorber, the ultraviolet absorber (I) is difficult to decompose even under a high temperature and high humidity environment, so the ultraviolet absorber (I) is hydrolyzed under acidic conditions such as polyester polymers. Even when used in combination with a polymer polymer having a property of being easily decomposed, decomposition of these polymer polymers and the like can be suppressed. For this reason, various performances, such as mechanical properties and adhesiveness of the ultraviolet absorbing layer (I), can be maintained over a long period of time.

The ultraviolet absorbing layer (I) may contain an adhesive as a polymer polymer. The pressure-sensitive adhesive has any form, and examples thereof include active energy ray-curable pressure-sensitive adhesives, solvent-type (solution-type) pressure-sensitive adhesives, hot-melt pressure-sensitive adhesives, and emulsion-type pressure-sensitive adhesives. As a material type of an adhesive, what was demonstrated by the kind of the polymer polymer mentioned above is mentioned.

The content of the polymer polymer in the ultraviolet absorbing layer (I) is preferably 0.1% by mass or more, more preferably 1% by mass or more, and even more preferably 10% by mass or more. The upper limit of the content of the polymer polymer in the ultraviolet absorbing layer (I) is preferably 100% by mass or less, and more preferably 95% by mass or less.

The ultraviolet absorbing layer (I) may contain a cured product derived from a curable compound. According to this aspect, it can be set as the ultraviolet absorbing layer (I) excellent in film forming properties and mechanical properties. Examples of the curable compound include a compound having a group having an ethylenically unsaturated bond, a compound having an epoxy group, a compound having a methylol group, a compound having a -O-Si-O- structure, and the like. Examples of the group having an ethylenically unsaturated bond include a vinyl group, (meth)allyl group, and (meth)acryloyl group.

The content of the cured product derived from the curable compound in the ultraviolet absorbing layer (I) is preferably 0.1% by mass or more, more preferably 1% by mass or more, and even more preferably 10% by mass or more. Moreover, it is preferable that the upper limit of content of the hardened|cured material derived from the curable compound in ultraviolet absorbing layer (I) is 100 mass% or less, and it is more preferable that it is 95 mass% or less. Moreover, the content of the total of the polymer polymer and the cured product derived from the curable compound in the ultraviolet absorbing layer (I) is preferably 1% by mass or more, more preferably 10% by mass or more, and even more preferably 50% by mass or more. Further, the upper limit of the total content of the polymer polymer and the cured product derived from the curable compound in the ultraviolet absorbing layer (I) is preferably 100% by mass or less, and more preferably 95% by mass or less.

The ultraviolet absorbing layer (I) may further contain additives such as a light scattering agent, a crosslinking agent, a light stabilizer, a crosslinking accelerator, an antioxidant, and a silane coupling agent. The kind and content of these additives can be appropriately selected depending on the use of the ultraviolet absorbing layer (I) or the application site.

In the organic electroluminescent display device of the present invention, the ultraviolet absorbing layer (I) is included in at least one of the display panel and the original polarizing plate, or is included between the display panel and the original polarizing plate. The ultraviolet absorbing layer (I) may be included in at least one of the display panel and the original polarizing plate, and between the display panel and the original polarizing plate.

In the organic electroluminescent display device of the present invention, it is also preferable to use the ultraviolet absorbing layer (I) as an adhesive layer. According to the organic electroluminescent display device of the present invention, even when the organic electroluminescent display device is exposed to a high temperature and high humidity environment, it is possible to suppress the deterioration of the ultraviolet absorber layer (I) due to decomposition of the ultraviolet absorber (I), etc. The adhesiveness of a member or a layer can be maintained over a long period of time. As a specific example which uses the ultraviolet absorbing layer (I) as an adhesive layer, the aspect which bonds various members and various layers contained in a display panel or a circular polarizing plate, and arrange|positions an ultraviolet absorbing layer (I) between a display panel and a circular polarizing plate, and both And an aspect in which the ultraviolet absorbing layer (I) is disposed between the display panel and the original polarizing plate to bond both.

In the organic electroluminescent display device of the present invention, the ultraviolet absorbing layer (I) can also be used for a planarization layer, a passivation layer, a capping layer, and the like in the display panel.

Next, circular polarization used in the organic electroluminescent display device of the present invention will be described. It is preferable that the circularly polarizing plate used in the organic electroluminescent display device of the present invention includes a polarizer and a retardation film.

It is preferable that the polarizer is a so-called linear polarizer having a function of converting natural light into specific linear polarization. As the polarizer, for example, an absorbing polarizer can be used. As the absorption type polarizer, a polarizer that is commonly used can be used, and for example, an iodine-based polarizer, a dye-based polarizer using a dichroic dye, a polyene-based polarizer, and a polarizer using a wire grid can be used. have. The iodine-based polarizer and the dye-based polarizer can generally be produced by adsorbing iodine or a dichroic dye onto a polyvinyl alcohol-based film and stretching it. One preferred aspect of the polarizer is an iodine-dyed polyvinyl alcohol-based film. Further, the polarizer may be a so-called coated polarizer. For the coated polarizer, paragraphs 0052 to 0053 of JP 2014-170202 A can be referred to. The thickness of the polarizer is not particularly limited, and is preferably 0.1 to 50 μm, for example.

Examples of the retardation film include a λ/4 plate, a λ/2 plate, and the like. The circular polarizing plate used in the present invention is preferably a λ/4 plate as a retardation film. Moreover, you may use together the [lambda]/4 plate and the [lambda]/2 plate.

Here, the λ/4 plate refers to an optical layer that delays the phase of incident light by λ/4. For example, when the wavelength λ of the incident light is 550 nm, the light passing through the λ/4 plate has a phase delay value of 137.5 nm. In addition, the λ/4 plate has optical anisotropy and can change the polarization state of light incident on the λ/4 plate. Specifically, linearly polarized light may be converted to circularly polarized light, or circularly polarized light (elliptical polarized light) may be converted to linearly polarized light. Moreover, the λ/2 plate is an optical layer that delays the phase of incident light by λ/2. For example, when the wavelength λ of the incident light is 550 nm, the light passing through the λ/2 plate has a phase delay value of 275 nm. In addition, the λ/2 plate can change the polarization state of light incident on the λ/2 plate. Specifically, the polarization direction of linearly polarized light can be changed.

When the λ/4 plate and the λ/2 plate are used together, one of the phase delay value in the thickness direction of the λ/4 plate and the phase delay value in the thickness direction of the λ/2 plate has a positive value, and the other It is desirable to have a negative value. For example, it is preferable that the λ/4 plate is a positive A-Plate, and the λ/2 plate is a negative A-Plate.

The original polarizing plate used in the present invention may further include an ultraviolet absorbing layer (I) in addition to the polarizer and the retardation film.

The original polarizing plate used in the present invention may further include various functional layers such as a protective film, an antireflection layer, a hard coating layer, a brightness enhancing film layer, an adhesive layer, and a surface treatment layer, in addition to the polarizer and the retardation film. These functional layers may contain the ultraviolet absorber (I). That is, these functional layers may be the above-described ultraviolet absorbing layer (I).

As a preferable aspect of the original polarizing plate used in the present invention, there may be mentioned an aspect including a polarizer, a retardation film and an adhesive layer. The adhesive layer can be used by being disposed between a polarizer and a retardation film. Moreover, in the case of including another functional layer other than a polarizer and a retardation film, an adhesive layer can be arrange|positioned and used between a polarizer and another functional layer, between different functional layers, and between another functional layer and a retardation film. Moreover, the adhesive layer may contain the ultraviolet absorber (I). That is, the adhesive layer may be an ultraviolet absorbing layer (I). Moreover, when a circular polarizing plate has a plurality of adhesive layers, all of the plurality of adhesive layers may be an ultraviolet absorbing layer (I), or at least one of the plurality of adhesive layers may be an ultraviolet absorbing layer (I).

The following aspect (1) and (2) are mentioned as a specific aspect of the circular polarizing plate used by this invention.

(1) Aspect having a polarizer and a λ/4 plate. In this aspect, an adhesive layer may be provided between the polarizer and the λ/4 plate. Moreover, the adhesive layer may contain the ultraviolet absorber (I). Moreover, you may have various functional layers, such as a protective film, on the other surface side of a polarizer or the surface opposite to the polarizer of a λ/4 plate.

(2) An aspect having a polarizer, a λ/4 plate, and a λ/2 plate disposed between the polarizer and the λ/4 plate. In this aspect, an adhesive layer may be provided between the polarizer and the λ/2 plate, and between the λ/2 plate and the λ/4 plate. Moreover, the adhesive layer may contain the ultraviolet absorber (I). Moreover, you may have various functional layers, such as a protective film, on the other surface side of a polarizer or the surface opposite to the polarizer of a λ/4 plate.

Moreover, as a circular polarizing plate, the circular polarizing plate of the structure described in international publication WO2013/038684 and JP2015-187717 can be used.

Next, a display panel used in the organic electroluminescent display device of the present invention will be described. The display panel in this invention contains an organic electroluminescent element. One embodiment of the display panel will be described with reference to FIGS. 1 to 3. 1 is a plan view showing one of the pixels included in the display panel, FIG. 2 is a circuit diagram of the same pixel, and FIG. 3 is a cross-sectional view schematically corresponding to line III-III' of FIG. 1.

As shown in FIGS. 1 and 2, the pixel PX included in the display panel has a wiring portion composed of a gate wiring GL, a data wiring DL, and a driving voltage wiring DVL. Each of the pixels PX includes thin film transistors TFT1 and TFT2 connected to a wiring portion, an organic EL device connected to the thin film transistors TFT1 and TFT2, and a capacitor Cst. In addition, in one embodiment of the present invention, although one pixel is illustrated as being connected to one gate wiring, one data wiring, and one driving voltage wiring as an example, the present invention is not limited thereto, and the plurality of pixels PX A may be connected to one gate wiring, one data wiring, and one driving voltage wiring. Further, one pixel may be connected to at least one gate wiring, at least one data wiring, and at least one driving voltage wiring.

The gate wiring GL extends in the first direction DR1. The data line DL extends toward the second direction DR2 crossing the gate line GL. The driving voltage wiring DVL extends substantially in the same direction as the data wiring DL, that is, toward the second direction DR2. The gate wiring GL transmits a scan signal to the thin film transistors TFT1 and TFT2, the data wiring DL transfers a data signal to the thin film transistors TFT1 and TFT2, and the driving voltage wiring DVL comprises a thin film transistor ( Driving voltages are provided to TFT1 and TFT2).

Each of the pixels PX emits light of a specific color, for example, one of red light, green light, and blue light. The type of color light is not limited to the above, for example, cyan light, magenta light, yellow light, or the like may be added. Each of the pixels PX may emit white light.

The thin film transistors TFT1 and TFT2 may include a driving thin film transistor TFT2 for controlling the organic EL device and a switching thin film transistor TFT1 for switching the driving thin film transistor TFT2. In one embodiment of the present invention, although it is described that each of the pixels PX includes two thin film transistors TFT1 and TFT2, the present invention is not limited thereto, and each of the pixels PX includes one thin film transistor and a capacitor. Each of the pixels PX may include three or more thin film transistors and two or more capacitors.

The switching thin film transistor TFT1 includes a first gate electrode GE1, a first source electrode SE1, and a first drain electrode DE1. The first gate electrode GE1 is connected to the gate line GL, and the first source electrode SE1 is connected to the data line DL. The first drain electrode DE1 is connected to the first common electrode CE1 by the fifth contact hole CH5. The switching thin film transistor TFT1 transmits the data signal applied to the data line DL to the driving thin film transistor TFT2 according to the scan signal applied to the gate line GL.

The driving thin film transistor TFT2 includes a second gate electrode GE2, a second source electrode SE2, and a second drain electrode DE2. The second gate electrode GE2 is connected to the first common electrode CE1. The second source electrode SE2 is connected to the driving voltage line DVL. The second drain electrode DE2 is connected to the first electrode EL1 by the third contact hole CH3.

The first electrode EL1 is connected to the second drain electrode DE2 of the driving thin film transistor TFT2. A common voltage is applied to the second electrode EL2 (see FIG. 3 ), and the light emitting layer EML displays an image by emitting light according to the output signal of the driving thin film transistor TFT2.

The capacitor Cst is connected between the second gate electrode GE2 and the second source electrode SE2 of the driving thin film transistor TFT2, and is input to the second gate electrode GE2 of the driving thin film transistor TFT2. Charge and maintain the data signal. The capacitor Cst includes the first common electrode CE1 connected by the first drain electrode DE1 and the sixth contact hole CH6 and the second common electrode CE2 connected by the driving voltage line DVL. do.

Referring to FIG. 3 together, the display panel 200 has a base substrate BS. An inorganic substrate, a resin substrate, etc. are mentioned as a kind of base substrate BS. Examples of the inorganic substrate include a glass substrate, a quartz substrate, a silicon substrate, a silicon nitride substrate, and a composite substrate obtained by depositing molybdenum, titanium, aluminum, copper, etc. on these substrates, molybdenum substrate, titanium substrate, And metal substrates such as aluminum substrates and copper substrates. Examples of the resin substrate include polyethylene terephthalate substrates, polyethylene naphthalate substrates, polyimide substrates, and polyethersulfone substrates. The base substrate BS is selected in consideration of mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and waterproofness. It is preferable that the base substrate BS is transparent.

A substrate buffer layer (not shown) may be provided on the base substrate BS. By providing the substrate buffer layer, diffusion of impurities into the switching thin film transistor TFT1 and the driving thin film transistor TFT2 can be prevented. Examples of the material of the substrate buffer layer include silicon nitride (SiNx), silicon oxide (SiOx), and silicon nitride (SiOxNy).

The first semiconductor pattern SM1 and the second semiconductor pattern SM2 are disposed on the base substrate BS. Since the first semiconductor pattern SM1 and the second semiconductor pattern SM2 are formed of a semiconductor material, they act as active layers of the switching thin film transistor TFT1 and the driving thin film transistor TFT2. Each of the first semiconductor pattern SM1 and the second semiconductor pattern SM2 includes a source region SA, a drain portion DRA, and a channel region CA disposed between the source portion SA and the drain portion DRA. ). N-type impurities or P-type impurities are doped in the source portion SA and the drain portion DRA.

The gate insulating layer GI is disposed on the first semiconductor pattern SM1 and the second semiconductor pattern SM2. The gate insulating layer GI is made of an organic insulating material or an inorganic insulating material.

The first gate electrode GE1 and the second gate electrode GE2 are disposed on the gate insulating layer GI. The first gate electrode GE1 and the second gate electrode GE2 are formed to cover regions corresponding to the drain portion DRA of the first semiconductor pattern SM1 and the second semiconductor pattern SM2, respectively.

The insulating layer IL is disposed on the first gate electrode GE1 and the second gate electrode GE2. The insulating layer IL covers the first gate electrode GE1 and the second gate electrode GE2. The insulating layer IL is made of an organic insulating material or an inorganic insulating material.

The first source electrode SE1 and the first drain electrode DE1, the second source electrode SE2 and the second drain electrode DE2 are disposed on the insulating layer IL. The second drain electrode DE2 contacts the drain portion DRA of the second semiconductor pattern SM2 by the first contact hole CH1 formed in the gate insulating layer GI and the insulating layer IL, and the second drain electrode DE2 contacts the second drain electrode DE2. The source electrode SE2 is in contact with the source portion SA of the second semiconductor pattern SM2 by the second contact hole CH2 formed in the gate insulating layer GI and the insulating layer IL. The first source electrode SE1 contacts the source portion (not shown) of the first semiconductor pattern SM1 by the fourth contact hole CH4 formed in the gate insulating layer GI and the insulating layer IL, The first drain electrode DE1 is in contact with the drain portion (not shown) of the first semiconductor pattern SM1 by the fifth contact hole CH5 formed in the gate insulating layer GI and the insulating layer IL. .

The passivation layer PL is disposed on the first source electrode SE1, the first drain electrode DE1, and the second source electrode SE2 and the second drain electrode DE2. The passivation layer PL may serve as a protective film for protecting the switching thin film transistor TFT1 and the driving thin film transistor TFT2, and may also serve as a planarization film for planarizing the surface. The passivation layer PL may contain the ultraviolet absorber (I) described above. That is, the passivation layer PL may be the above-described ultraviolet absorbing layer (I).

The first electrode EL1 is disposed on the passivation layer PL. The first electrode EL1 is, for example, an anode. The first electrode EL1 is connected to the second drain electrode DE2 of the driving thin film transistor TFT2 through the third contact hole CH3 formed in the passivation layer PL.

On the passivation layer PL, a pixel defining layer PDL partitioning the light emitting layer EMl to correspond to each of the pixels PX is disposed. The pixel defining layer PDL exposes the top surface of the first electrode EL1 and protrudes from the base substrate BS.

An organic electroluminescent element OEL is disposed in an area surrounded by the pixel defining layer PDL. The organic electroluminescent device OEL includes a first electrode EL1, an organic layer OL, and a second electrode EL2. The organic layer OL includes a light emitting layer EMl. More specifically, the organic layer OL includes a hole transport region HTR, a light emitting layer EML, and an electron transport region ETR. The organic electroluminescent device OEL further includes a capping layer CPL disposed on the second electrode EL2. The first electrode EL1 is a pixel electrode or an anode. The first electrode EL1 is preferably a transmissive electrode, a semi-transmissive electrode, or a reflective electrode. When the first electrode EL1 is a transmissive electrode, the first electrode EL1 is a transparent metal oxide, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin (ITZO) zinc oxide). When the first electrode EL1 is a semi-transmissive electrode or a reflective electrode, the first electrode EL1 is Al, Cu, Ti, Mo, Ag, Mg, Pt, Pd, Au, Ni, Nd, Ir, and Cr It is preferable to include at least one atom selected from.

The organic layer OL is disposed on the first electrode EL1. The organic layer OL includes a light emitting layer EMl. The organic layer OL further includes a hole transport region HTR and an electron transport region ETR. The hole transport region HTR is disposed on the first electrode EL1. It is preferable that the hole transport region (HTR) includes at least one of a hole injection layer, a hole transport layer, a buffer layer, and an electron blocking layer.

The hole transport region HTR may have a single layer made of a single material, a single layer made of different materials in a plurality of arcs, or a multi-layer structure having a plurality of layers made of different materials in a plurality of arcs. For example, the hole transport region HTR has a structure of a single layer made of different materials in a plurality of arcs, or a hole injection layer/hole transport layer, a hole injection layer/ which are sequentially stacked from the first electrode EL1. The structure may have a hole transport layer/buffer layer, a hole injection layer/buffer layer, a hole transport layer/buffer layer, or a hole injection layer/hole transport layer/electron blocking layer, but is not limited thereto.

The hole transport region (HTR) includes various methods such as vacuum deposition, spin coating, cast, LB (Langmuir-Blodgett), inkjet printing, laser printing, and laser induced thermal imaging (LITI). It can be formed using.

The emission layer EML is disposed on the hole transport region HTR. The light emitting layer EML may have a single layer made of a single material, a single layer made of different materials in multiple arcs, or a multi-layer structure having a plurality of layers made of different materials in multiple arcs. The light emitting layer EML is not particularly limited as long as it is a commonly used material, and examples thereof include materials that emit red, green, and blue light. In addition, the emission layer EML may include a host and a dopant.

The electron transport region ETR is disposed on the emission layer EML. The electron transport region ETR may include at least one of an electron blocking layer, an electron transport layer, and an electron injection layer, but is not limited thereto.

The second electrode EL2 is disposed on the electron transport region ETR. The second electrode EL2 is a common electrode or a cathode. The second electrode EL2 is preferably a transmissive electrode, a semi-transmissive electrode, or a reflective electrode. When the second electrode EL2 is a transmissive electrode, the second electrode EL2 is Li, Ca, LiF/Ca, LiF/Al, Al, Mg, BaF, Ba, Ag, or a compound or mixture thereof (for example, , Ag and Mg). When the second electrode EL2 is a semi-transmissive electrode or a reflective electrode, the second electrode EL2 is Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca , LiF/Ca, LiF/Al, Mo, Ti or a compound thereof, or a mixture (for example, a mixture of Ag and Mg). In addition, a plurality of reflective films formed of the above-described material, a semi-transmissive film and a transparent conductive film formed of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), etc. The layer structure of may be sufficient.

Although not illustrated, the second electrode EL2 may be connected to the auxiliary electrode. For example, the auxiliary electrode is connected to the second electrode EL2, and has a function of lowering the resistance value of the second electrode EL2.

When the organic electroluminescent device OEL is of a total surface emission type, the first electrode EL1 is a reflective electrode, and the second electrode EL2 is a transmissive electrode or a semi-transmissive electrode. When the organic electroluminescent device OEL is of a back emission type, the first electrode EL1 is a transmissive electrode or a semi-transmissive electrode, and the second electrode EL2 is a reflective electrode.

In the organic electroluminescent device OEL, a voltage is applied to the first electrode EL1 and the second electrode EL2, respectively, so that holes injected from the first electrode EL1 are hole transport regions HTR. The electrons injected from the second electrode EL2 are transferred to the emission layer EML through the electron transport region ETR. The electrons and holes are recombined in the light emitting layer EML to generate excitons, and the excitons fall from the excited state to the ground state and emit light.

A capping layer CPL is disposed on the second electrode EL2. The capping layer CPL adjusts the optical interference distance by adjusting the optical path length of the organic EL device OEL. The capping layer CPL also has a function of protecting the organic layer OL from moisture and/or oxygen. The capping layer CPL may be provided with optical properties, if necessary, and may have a function of, for example, improving light extraction efficiency. The capping layer can be formed using, for example, a photocurable composition.

The capping layer (CPL) may contain the ultraviolet absorber (I) described above. That is, the capping layer CPL may be the above-described ultraviolet absorbing layer I. Further, although not shown, an ultraviolet absorbing layer I may be provided between the capping layer CPL and the second electrode EL2.

The thickness of the capping layer (CPL) is not particularly limited, but is preferably 20 to 200 nm, and more preferably 60 to 80 nm.

The sealing layer SL is disposed on the capping layer CPL. The sealing layer SL has a function of covering a layer located at the bottom. The sealing layer SL may contain the ultraviolet absorber (I) mentioned above. That is, the above-mentioned ultraviolet absorbing layer (I) may be sufficient as the sealing layer SL. Further, although not shown, an ultraviolet absorbing layer (I) may be provided between the sealing layer SL and the capping layer CPL or on the surface of the sealing layer SL.

The sealing layer SL can be formed of an inorganic material such as glass, an organic film, an inorganic film, a laminated film of an inorganic film and an organic film, and the like. Examples of the inorganic film include a silicon nitride film, an aluminum oxide film, a silicon dioxide film, and a titanium oxide film. Examples of the organic film include a single film or a laminated film formed of any one of polyethylene terephthalate, polyimide, polycarbonate, epoxy, polyethylene, and polyacrylate.

In the present invention, as the display panel, it is possible to use a display panel having the structure described in International Publication No. WO2013/038684 and Japanese Patent Publication No. 2008-016379.

Next, an embodiment of the organic electroluminescent display device of the present invention will be described with reference to the drawings.

The organic electroluminescent display device 10 shown in FIG. 4 includes the display panel 200, the original polarizing plate 100, and the adhesive layer 300 disposed between the display panel 200 and the original polarizing plate 100. Have In the organic electroluminescent display device 10 shown in FIG. 4, one surface of the adhesive layer 300 contacts the original polarizing plate 100, and the other surface of the adhesive layer 300 contacts the display panel 200. .

In the organic electroluminescent display device shown in Fig. 4, any one of the following (A-1) to (A-3) is satisfied. In particular, in the case of satisfying (A-3), even if the organic electroluminescent display device is exposed to high temperature and high humidity, the adhesion between the original polarizing plate 100 and the display panel 200 can be maintained over a long period of time, which is preferable. It is an aspect. Moreover, in the case of the aspect of (A-3), the thickness of the adhesive layer 300 is not particularly limited, but is preferably 1 to 100 μm.

(A-1) The display panel 200 has an ultraviolet absorbing layer (I).

(A-2) The original polarizing plate 100 has an ultraviolet absorbing layer (I).

(A-3) The adhesive layer 300 contains an ultraviolet absorber (I) (that is, the adhesive layer 300 is an ultraviolet absorbing layer (I)).

The organic electroluminescent display device of the present invention may further include a touch sensing unit. The touch sensing unit may be disposed between the display panel 200 and the original polarizing plate 100, or may be disposed on the original polarizing plate 100 (a surface side opposite to the display panel 200 ).

Example

Hereinafter, the present invention will be described in more detail with reference to Examples. Materials, amounts, proportions, treatment contents, treatment procedures and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below. In addition, in the following Examples, the compounds (I)-1 to (I)-6 used as the ultraviolet absorber (I) are compounds of the following structures, respectively. These compounds were synthesized with reference to the synthesis method described in JP 2009-263617 A.

[Formula 5]

<Test Example 1>

(Example 1-1)

63 parts by mass of 2-ethylhexyl acrylate, 9 parts by mass of methyl methacrylate, 15 parts by mass of N-vinyl-2-pyrrolidone, 13 parts by mass of 2-hydroxyethyl acrylate, and ethyl acetate as polymerization solvent 175 parts by mass of the mixture was charged into a separate flask and stirred for 1 hour while introducing nitrogen gas. After removing the oxygen in the polymerization system, 0.2 parts by mass of 2,2'-azobisisobutyronitrile was added as a polymerization initiator, and then the temperature of the solution was raised to 63°C and reacted for 10 hours. Then, ethyl acetate was added to obtain an acrylic polymer solution having a solid content concentration of 36% by mass. Moreover, the weight average molecular weight of the acrylic polymer in the said acrylic polymer solution was 850,000.

Next, 0.528 parts by mass of an isocyanate-based crosslinking agent (Takenate D110N, manufactured by Mitsui Chemical Co., Ltd., active ingredient amount 75%), silane coupling agent, based on 100 parts by mass of the acrylic polymer in the acrylic polymer solution (KBM403, Shin-Etsu Chemical Co., Ltd., active ingredient amount 100%) 0.054 parts by weight, UV absorber (Compound (I)-1) 2.700 parts by weight, light stabilizer (Tinuvin123, manufactured by BASF, 100% active ingredient) 0.360 parts by mass was added and mixed to obtain an acrylic pressure-sensitive adhesive composition.

Next, the acrylic pressure-sensitive adhesive composition was coated on the release surface of a polyethylene terephthalate separator (MRF75, manufactured by Mitsubishi Corporation) whose surface was peeled, so that the thickness after drying was 50 μm, and heated at 60° C. for 1 minute. After drying and heating at 140° C. for 1 minute, aging was also performed at 23° C. for 120 hours to obtain an adhesive sheet (inorganic material adhesive sheet having a structure of an acrylic pressure-sensitive adhesive layer/peel film).

Next, after manufacturing a circular polarizing plate according to the technique of paragraph No. 0025 to 0066 of JP 2015-187717 A, the adhesive sheet was pasted on the obtained circular polarizing plate to prepare a circular polarizing plate having an adhesive layer.

Next, the GALAXY SII manufactured by SAMSUNG equipped with a display panel including an organic electroluminescent element was disassembled, and the original polarizing plate was peeled from the display panel. Subsequently, a release film was peeled from the original polarizing plate having the above-mentioned pressure-sensitive adhesive layer, and the original polarizing plate was pasted to the surface of the display panel where the original polarizing plate was peeled to produce an organic electroluminescent display device.

(Examples 1-2 to 1-6)

In Example 1-1, as the ultraviolet absorber, an acrylic adhesive was used in the same manner as in Example 1-1, except that the same amount of Compound (I)-2 to Compound (I)-6 was used instead of Compound (I)-1. A composition was prepared, and an organic electroluminescent display device was manufactured in the same manner as in Example 1-1 using this acrylic pressure-sensitive adhesive composition.

(Comparative Example 1-1)

In Example 1-1, as the ultraviolet absorber, 0.13 parts by mass of Tinuvin 1130 (manufactured by BASF, benzotriazole-based ultraviolet absorber) instead of compound (I)-1, and Tinuvin 326 (manufactured by BASF, benzotriazole-based ultraviolet light) An acrylic pressure-sensitive adhesive composition was prepared in the same manner as in Example 1-1 except that 2.57 parts by mass of the absorbent) was used, and an organic electroluminescent display device was manufactured in the same manner as in Example 1-1 using this acrylic pressure-sensitive adhesive composition.

(Comparative Example 1-2)

In Example 1-1, as the ultraviolet absorber, 0.05 parts by mass of Tinuvin Carboprotect (manufactured by BASF, benzotriazole-based ultraviolet absorber) instead of compound (I)-1, and Tinuvin 1130 (manufactured by BASF, benzotriazole-based ultraviolet light) An acrylic pressure-sensitive adhesive composition was prepared in the same manner as in Example 1-1, except that 0.10 parts by weight of absorbent) and 2.55 parts by weight of Tinuvin 326 (manufactured by BASF, a benzotriazole-based ultraviolet absorbent) were used, and this acrylic pressure-sensitive adhesive composition was used. Thus, an organic electroluminescent display device was manufactured in the same manner as in Example 1-1.

[evaluation]

(Light resistance)

Each of the organic electroluminescent display devices of Examples 1-1 to 1-6 and Comparative Examples 1-1 and 1-2 was installed on an accelerated weather resistance tester (Super Xenon Weather Meter SX75 manufactured by Suga Shikenki Co., Ltd.), In an environment of 60°C and a relative humidity of 50%, light resistance test was performed by irradiating light for 500 hours. In addition, the irradiated light of the accelerated weather resistance tester has a spectrum approximating sunlight in the outdoors, and a light resistance test simulating use in the outdoors can be performed. The luminance A0 before light irradiation and the luminance A1 after light irradiation were measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.) to calculate the ratio (A1/A0) of luminance drop in light irradiation.

(Adhesiveness)

Each of the organic electroluminescent display devices of Examples 1-1 to 1-6 and Comparative Examples 1-1 and 1-2 was allowed to stand for 1000 hours in an environment of 80°C and 90% relative humidity to perform a heat and moisture resistance test. About the organic electroluminescence display device after a heat-and-moisture-heat test, the presence or absence of excitation and peeling of an original polarizing plate was visually observed and evaluated in three steps.

A: No lifting or peeling was observed.

B: Lifting or peeling is slightly confirmed, but there is no practical problem.

C: There is excitation or peeling on the entire surface, which is impractical.

[Table 1]

As shown in Table 1, Examples 1-1 to 1-6 using compounds (I)-1 to Compound (I)-6 as ultraviolet absorbers had lower luminance than Comparative Examples 1-1 and 1-2. Was small and excellent in light resistance.

Moreover, in Examples 1-1 to 1-6, there was no lifting or peeling of the original polarizing plate from the display panel even after the heat and moisture resistance test, and the adhesiveness between the display panel and the original polarizing plate was good. Furthermore, when the light resistance test was conducted using the organic electroluminescent display device after the heat and humidity resistance test, the decrease in luminance of Examples 1-1 to 1-6 was smaller than that of Comparative Examples 1-1 and 1-2.

<Test Example 2>

(Examples 2-1 to 2-6)

Based on Example 3 of Japanese Patent Laid-Open No. 2016-076441, compounds (I)-1 to (I)-6 were used as ultraviolet absorbers in the ultraviolet absorbent layer 36 described in Japanese Patent Laid-Open No. 2016-076441. A display panel was manufactured in the same manner as in Example 3 of Japanese Unexamined Patent Publication No. 2016-076441. An organic electroluminescent display device was manufactured by attaching the original polarizing plate prepared according to the technique of paragraph No. 0025 to 0066 of JP 2015-187717 to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.).

(Comparative Examples 2-1, 2-2)

Based on Example 3 of Japanese Patent Laid-Open No. 2016-076441, a display panel is manufactured using anthracene or carbazole as an aromatic compound or heterocyclic compound in the ultraviolet absorbing layer 36 described in Japanese Patent Laid-Open No. 2016-076441. did. An organic electroluminescent display device was manufactured by attaching the original polarizing plate prepared according to the technique of paragraph No. 0025 to 0066 of JP 2015-187717 to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.).

Each of the organic electroluminescent display devices of Examples 2-1 to 2-6 and Comparative Examples 2-1 and 2-2 was subjected to the above-mentioned light resistance test, and the luminance (A0) before light irradiation and the luminance after light irradiation (A1) was measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.) to calculate the ratio (A1/A0) of luminance drop in light irradiation.

[Table 2]

As shown in Table 2, Examples 2-1 to 2-6 using Compounds (I)-1 to (I)-6 as ultraviolet absorbers had lower luminance than Comparative Examples 2-1 and 2-2. Was small and excellent in light resistance. In addition, after each of the organic electroluminescent display devices was allowed to stand for 1000 hours in an environment at 80°C and 90% relative humidity, a heat resistance test was conducted, and the light resistance test was conducted. Examples 2-1 to 2-6 were comparative examples. The decrease in luminance was smaller than that of 2-1 and 2-2, and the moisture and heat resistance was excellent.

<Test Example 3>

(Examples 3-1 to 3-6)

2-(2'-hydroxy-5'-octylphenyl)-benzotriazole as an ultraviolet absorber in the transparent filling layer 5, based on Example 1 of paragraph No. 0032 to 0052 of Japanese Patent Application Publication No. 2008-016379 Instead, the display panel was manufactured like Example 1 of Unexamined-Japanese-Patent No. 2008-016379 except having used the same mass of compounds (I)-1-(I)-6. An organic electroluminescent display device was manufactured by attaching the original polarizing plate manufactured according to the technique of paragraph No. 0025 to 0066 of JP 2015-187717 to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Industries, Ltd.).

(Comparative Example 3-1)

A display panel was produced based on Example 1 of paragraph No. 0032 to 0052 of Japanese Patent Application Publication No. 2008-016379. In the production of this display panel, 2-(2'-hydroxy-5'-octylphenyl)-benzotriazole was used as the ultraviolet absorber in the transparent filling layer 5. An organic electroluminescent display device was manufactured by attaching the original polarizing plate prepared according to the technique of paragraph No. 0025 to 0066 of JP 2015-187717 to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.).

Each of the organic electroluminescent display devices of Examples 3-1 to 3-6 and Comparative Example 3-1 was subjected to the aforementioned light resistance test, and the luminance (A0) before light irradiation and the luminance (A1) after light irradiation were measured. , Measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.) to calculate the ratio (A1/A0) of luminance drop in light irradiation. In Examples 3-1 to 3-6, a decrease in luminance was smaller than in Comparative Example 3-1, and light resistance was excellent. In addition, after each of the organic electroluminescent display devices was allowed to stand for 1000 hours in an environment at 80°C and 90% relative humidity, a moisture resistance test was conducted, and then the light resistance test was conducted. Examples 3-1 to 3-6 were comparative examples. The decrease in luminance was smaller than that of 3-1, and the moisture and heat resistance was excellent.

<Test Example 4>

(Examples 4-1 to 4-6)

As an ultraviolet absorber, instead of Tinuvin 928 (manufactured by BASF), instead of using the same mass of compounds (I)-1 to (I)-6, the original polarizing plate 101 of paragraph No. 0236 to 0269 of International Publication WO2013/038684 According to the manufacturing method, an original polarizing plate was produced. Next, the GALAXY SII manufactured by SAMSUNG equipped with a display panel including an organic electroluminescent element was disassembled, and the original polarizing plate was peeled from the display panel. Subsequently, the above-mentioned circular polarizing plate was adhered to the surface of the display panel where the above-mentioned circular polarizing plate was peeled off, using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to produce an organic electroluminescent display device.

(Comparative Example 4-1)

According to the manufacturing method of the circular polarizing plate 101 of Paragraph Nos. 0236 to 0269 of International Publication No. WO2013/038684, a circular polarizing plate was produced. In the production of this circular polarizing plate, Tinuvin 928 (manufactured by BASF) was used as the ultraviolet absorber. Next, the GALAXY SII manufactured by SAMSUNG equipped with a display panel including an organic electroluminescent element was disassembled, and the original polarizing plate was peeled from the display panel. Subsequently, the above-mentioned circular polarizing plate was adhered to the surface of the display panel where the above-mentioned circular polarizing plate was peeled off, using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to produce an organic electroluminescent display device.

Each of the organic electroluminescent display devices of Examples 4-1 to 4-6 and Comparative Example 4-1 was subjected to the aforementioned light resistance test, and the luminance (A0) before light irradiation and the luminance (A1) after light irradiation were measured. , Measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.) to calculate the ratio (A1/A0) of luminance drop in light irradiation. In Examples 4-1 to 4-6, the decrease in luminance was smaller than in Comparative Example 4-1, and light resistance was excellent. Further, after each of the organic electroluminescent display devices was allowed to stand for 1000 hours in an environment at 80°C and 90% relative humidity, a heat resistance test was conducted, and light resistance tests were conducted. Examples 4-1 to 4-6 were comparative examples. The decrease in luminance was smaller than 4-1, and the heat and moisture resistance was excellent.

10: organic electroluminescent display device
100: circular polarizer
200: display panel
BS: Base board
CA: Channel area
CE1: common electrode
CE2: common electrode
CH1~CH6: Contact hole
CPL: capping layer
Cst; Capacitor
DE1: first drain electrode
DE2: second drain electrode
DL: Data wiring
DRA: Drain part
DVL: drive voltage wiring
EL ¹ : 1st electrode
EL ² : Second electrode
EML: emitting layer
ETR: electron transport domain
GE1: first gate electrode
GE2: second gate electrode
GI: gate insulation layer
GL: Gate wiring
HTR: hole transport area
IL: insulating layer
OEL: organic electroluminescent device
OL: organic layer
PDL: pixel definition film
PL: Passivation layer
PX: Pixel
SA: Source section
SE1: first source electrode
SE2: second source electrode
SL: sealing layer
SM1: first semiconductor pattern
SM2: Second semiconductor pattern
TFT1: Thin film transistor (switching thin film transistor)
TFT2: thin film transistor (driving thin film transistor)

Claims (14)

An organic electroluminescent display device comprising a display panel including an organic electroluminescent element and a circular polarizing plate disposed on the display panel,
At least one of the display panel and the original polarizing plate has an ultraviolet absorbing layer containing an ultraviolet absorbing agent represented by Formula (I), or comprises an ultraviolet absorbing agent represented by Formula (I) between the display panel and the original polarizing plate. An organic electroluminescence display having an ultraviolet absorbing layer;
[Formula 1]

In the formula, R ¹¹ and R ¹² each independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group or an aryloxy group,
R ¹³ and R ¹⁴ each independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group,
R ¹¹ and R ¹² may combine with each other to form a ring,
R ¹³ and R ¹⁴ may combine with each other to form a ring,
R ¹⁵ and R ¹⁶ each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, or a sulfamoyl group . The method according to claim 1,
In Formula (I), R ¹¹ and R ¹² are hydrogen atoms. The method according to claim 1 or claim 2,
In the formula (I), R ¹³ and R ¹⁴ are a hydrogen atom or an alkyl group, an organic electroluminescent display device. The method according to any one of claims 1 to 3,
In Formula (I), R ¹⁵ and R ¹⁶ are a hydrogen atom, an alkyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, or an aryloxycarbonyl group, an organic electroluminescent display device. The method according to any one of claims 1 to 4,
The ultraviolet absorbing layer comprises a polymer polymer, an organic electroluminescent display device. The method according to claim 5,
The polymer polymer is polyacrylic polymer, polyester polymer, polycarbonate polymer, polyimide polymer, polyacrylamide polymer, polyurethane polymer, epoxy polymer, cellulose polymer, silicone polymer, polyvinyl alcohol An organic electroluminescent display device which is at least one selected from polymers based on polymers, polyvinylalkyl ether based polymers, and polyvinylpyrrolidone based polymers. The method according to claim 5,
The polymer polymer is at least one selected from polyester polymers and polyacrylic polymers, an organic electroluminescent display device. The method according to claim 5,
The polymer polymer is an adhesive, an organic electroluminescent display device. The method according to any one of claims 1 to 8,
An organic electroluminescent display device having the ultraviolet absorbing layer between the display panel and the original polarizing plate, one surface of the ultraviolet absorbing layer in contact with the display panel, and the other surface of the ultraviolet absorbing layer in contact with the circular polarizing plate. . The method according to any one of claims 1 to 8,
The original polarizing plate includes the ultraviolet absorbing layer, an organic electroluminescent display device. The method according to claim 10,
The original polarizing plate has a polarizer, a retardation film, and the ultraviolet absorbing layer, an organic electroluminescent display device. The method according to any one of claims 1 to 8,
The display panel includes the ultraviolet absorbing layer, an organic electroluminescent display device. The method according to claim 12,
The display panel has an organic electroluminescent element, a capping layer, and the ultraviolet absorbing layer disposed between the organic electroluminescent element and the capping layer. The method according to claim 12,
The display panel has an organic electroluminescent element and a capping layer, and the capping layer is the ultraviolet absorbing layer.

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