WO2019159570A1

WO2019159570A1 - Organic light emitting display device

Info

Publication number: WO2019159570A1
Application number: PCT/JP2019/000481
Authority: WO
Inventors: 竹内　潔
Original assignee: 富士フイルム株式会社
Priority date: 2018-02-15
Filing date: 2019-01-10
Publication date: 2019-08-22
Also published as: KR20200086699A; JPWO2019159570A1

Abstract

An organic light emitting display device comprising a display panel, which includes organic light emitting elements, and a circular polarizing plate, which is positioned on the display panel, wherein: at least one of the display panel and the circular polarizing plate comprises an ultraviolet ray absorbing layer having an ultraviolet ray absorber represented by formula (I); or, an ultraviolet ray absorber represented by formula (I) is positioned between the display panel and the circular polarizing plate. In the formula, R¹¹ and R¹² each independently represent a hydrogen atom or an alkyl group, etc., R¹³ and R¹⁴ each independently represent a hydrogen atom or an aliphatic group, etc., and R¹⁵ and R¹⁶ each independently represent a hydrogen atom or an alkyl group.

Description

Organic electroluminescence display

The present invention relates to an organic electroluminescent display device.

In the information society, display devices are becoming increasingly important as visual information transmission media. Examples of the display device include a liquid crystal display (LCD), a plasma display (PDP), an organic light emitting display (OLED), and a field effect display (field display). FED), electrophoretic display (EPD) and the like are known. Among them, the organic light emitting display device has attracted attention because it has advantages such as power saving, thinning, and high visibility.

Further, the light emitting layer used in the organic electroluminescent element of the organic electroluminescent display device is easily deteriorated by ultraviolet rays. Degradation of the light emitting layer leads to deterioration of characteristics such as luminance. For this reason, it has been studied to prevent deterioration of the light emitting layer due to ultraviolet rays in the organic electroluminescent display device. For example, Patent Documents 1 to 4 propose that an ultraviolet absorber is contained in an adjacent layer of a sealant used in a display panel including an organic electroluminescent element. Patent Document 5 describes a display device in which a polarizing member including a functional layer including a dye that absorbs light in a wavelength region of more than 380 nm and not more than 450 nm is provided on a display panel.

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

JP 2000-223271 A JP 2002-184572 A JP 2009-037809 A JP 2016-076441 A JP 2017-198991 A JP 2009-263616 A

However, according to the study of the present inventor, the organic electroluminescence display devices described in Patent Documents 1 to 5 cannot sufficiently suppress deterioration in characteristics such as luminance due to long-term light irradiation, and have poor light resistance. It turned out to be sufficient. In addition, the organic light emitting display device may be used under high temperature and high humidity. Even when an organic light emitting display is used in such an environment, it is desirable 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 element, external light or the like is reflected by the metal layer, and a background reflection or the like is likely to occur, so that the visibility is easily lowered. For this reason, providing a circularly-polarizing plate on a display panel is examined to prevent these problems.

However, according to the study of the present inventor, organic electroluminescence display devices having a circularly polarizing plate tend to be particularly prominent in characteristics such as delamination and brightness due to long-term high-temperature and high-humidity conditions and light irradiation. I understood that. This is due to changes in molecular weight and hydrophilicity / hydrophobicity caused by the decomposition of organic materials in display panels and circularly polarizing plates caused by wet heat and light, and the promotion of decomposition by retention of low-molecular organic compounds and gases produced by decomposition. It is believed that there is. Patent Document 6 discloses an invention relating to an ultraviolet absorber, but there is no description of an example used in an organic electroluminescence display device.

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

According to the study of the present inventor, it has been found that an organic electroluminescence display device having an ultraviolet absorbing layer containing an ultraviolet absorber represented by the formula (I) described later is excellent in light resistance and moist heat resistance. It came to be completed. Accordingly, the present invention provides the following.
<1> An organic electroluminescent display device including a display panel including an organic electroluminescent element and a circularly polarizing plate disposed on the display panel,
At least one of the display panel and the circularly polarizing plate has an ultraviolet absorbing layer containing an ultraviolet absorber represented by the formula (I), or is represented by the formula (I) between the display panel and the circularly polarizing plate. An organic electroluminescent display device having an ultraviolet absorbing layer containing an ultraviolet absorber;

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 represents 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 represents 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 electroluminescence display device according to <1>, wherein in formula (I), R ¹¹ and R ¹² are hydrogen atoms.
<3> The organic electroluminescent display device according to <1> or <2>, wherein in the formula (I), R ¹³ and R ¹⁴ are a hydrogen atom or an alkyl group.
<4> The compound according to any one of <1> to <3>, wherein in the 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. Organic electroluminescent display device.
<5> The organic electroluminescence display device according to any one of <1> to <4>, wherein the ultraviolet absorbing layer includes a polymer.
<6> The polymer is a polyacrylic polymer, polyester polymer, polycarbonate polymer, polyimide polymer, polyacrylamide polymer, polyurethane polymer, epoxy polymer, cellulose polymer, silicone polymer, polyvinyl alcohol. The organic electroluminescence display device according to <5>, which is at least one selected from a polymer, a polyvinyl alkyl ether polymer, and a polyvinyl pyrrolidone polymer.
<7> The organic electroluminescence display device according to <5>, wherein the polymer is at least one selected from a polyester polymer and a polyacrylic polymer.
<8> The organic electroluminescence display device according to <5>, wherein the polymer is an adhesive.
<9> The ultraviolet absorbing layer is provided between the display panel and the circularly polarizing plate, one surface of the ultraviolet absorbing layer is in contact with the display panel, and the other surface of the ultraviolet absorbing layer is in contact with the circularly polarizing plate. The organic electroluminescence display device according to any one of <1> to <8>.
<10> The organic electroluminescence display device according to any one of <1> to <8>, wherein the circularly polarizing plate includes the ultraviolet absorbing layer.
The <11> circularly-polarizing plate is an organic electroluminescent display apparatus as described in <10> which has a polarizer, retardation film, and the said ultraviolet absorption layer.
<12> The organic electroluminescence 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 includes 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 includes an organic electroluminescent element and a capping layer, and the capping layer is the ultraviolet absorbing layer.

According to the present invention, it is possible to provide an organic electroluminescence display device excellent in light resistance and heat and moisture resistance.

It is the top view which showed one of the pixels contained in a display panel. It is a circuit diagram of the pixel. FIG. 3 is a cross-sectional view schematically showing a line III-III ′ in FIG. 1. 1 is a schematic view showing an embodiment of an organic light emitting display device of the present invention.

Hereinafter, the contents of the present invention will be described in detail.
In the notation of a group (atomic group) in this specification, the notation which does not describe substitution and unsubstituted includes the group which has a substituent with the group which does not have 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 this specification, a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
In this specification, a weight average molecular weight and a number average molecular weight are defined as a polystyrene conversion value by a gel permeation chromatography (GPC) measurement.

<Organic electroluminescence display>
An organic electroluminescent display device of the present invention is an organic electroluminescent display device including a display panel including an organic electroluminescent element, and a circularly polarizing plate disposed on the display panel,
At least one of the display panel and the circularly polarizing plate has an ultraviolet absorbing layer containing an ultraviolet absorber represented by the formula (I), or is represented by the formula (I) between the display panel and the circularly polarizing plate. It has the ultraviolet absorption layer containing a ultraviolet absorber, It is characterized by the above-mentioned. Hereinafter, the ultraviolet absorber represented by the formula (I) is also referred to as an ultraviolet absorber (I). Moreover, the ultraviolet absorption layer containing the ultraviolet absorber represented by the formula (I) is also referred to as an ultraviolet absorption layer (I).

The organic electroluminescent display device of the present invention has the ultraviolet absorbing layer (I), so that even when the organic electroluminescent display device is irradiated with light for a long period of time, the performance degradation of the light emitting layer is suppressed and the luminance is reduced. Can be suppressed. This is because the ultraviolet absorber (I) contained in the ultraviolet absorbing layer (I) has a characteristic that it is difficult to be decomposed even when irradiated with light for a long period of time, so that the irradiation of ultraviolet rays to the light emitting layer can be shielded for a long period of time. It is guessed. For this reason, the organic electroluminescent display device of the present invention has excellent light resistance. In addition, the organic electroluminescent display device of the present invention has the ultraviolet absorbing layer (I), thereby suppressing deterioration of the performance of the light emitting layer due to ultraviolet rays even after the organic electroluminescent display device is exposed to high temperature and high humidity. Thus, a decrease in luminance can be suppressed. It is assumed that the ultraviolet absorbent (I) contained in the ultraviolet absorbing layer (I) is hardly decomposed even under high temperature and high humidity. For this reason, the organic electroluminescent display device of the present invention has excellent wet heat resistance. In addition, since the ultraviolet absorbent (I) is not easily decomposed even when the organic light emitting display device is exposed to high temperature and high humidity, the ultraviolet absorbent layer (I) may be modified due to the decomposition of the ultraviolet absorbent (I). Can be suppressed. For this reason, mechanical properties such as the strength of the ultraviolet absorbing layer (I) and adhesion between the ultraviolet absorbing layer (I) and other layers can be maintained for a long time even after exposure to high temperature and high humidity. . For example, when the ultraviolet absorbing layer (I) is disposed between the display panel and the circularly polarizing plate, the adhesion between the display panel and the circularly 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 circularly polarizing plate on the display panel, the circularly polarizing plate can suppress external light reflection and the like, thereby suppressing reflection of the background and the like. A light-emitting display device can be obtained.

In addition, the light emitting layer used for the display panel is often made of a material having low light resistance. In manufacturing a display panel, a layer formed after the formation of a light-emitting layer such as a capping layer is often formed by using a photocurable composition and curing the photocurable composition by irradiating ultraviolet rays or the like. . When the display panel in the organic electroluminescent display device of the present invention includes an ultraviolet absorbing layer (I) (for example, when the ultraviolet absorbing layer (I) is provided between the organic electroluminescent element and the capping layer, or when the capping layer is an ultraviolet ray) In the case of the absorption layer (I), etc.), it is possible to prevent the light emitting layer from being irradiated with ultraviolet rays when the display panel is manufactured. For this reason, it is easy to obtain an organic electroluminescence display device with higher luminance.

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

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

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 represents 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 represents 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. Represent.

In the 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 are a hydrogen atom, a halogen atom, an alkyl group or an aryl group Are more preferable, and a hydrogen atom, a halogen atom, or an alkyl group is more preferable, and a hydrogen atom is particularly preferable because excellent light resistance and heat-and-moisture resistance are easily obtained.

Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
The number of carbon atoms of the alkyl group and alkoxy group is preferably 1-30, more preferably 1-20, still more preferably 1-15, particularly preferably 1-10, and most preferably 1-7. The alkyl group and alkoxy group may be linear, branched or cyclic, and are preferably linear or branched, and more preferably linear. In addition, the cyclic alkyl group and the alkyl group portion of the cyclic alkoxy group may be a monocyclic cycloalkyl group or a polycyclic alkyl group (such as a bicycloalkyl group or a tricycloalkyl group). . The alkyl group and alkoxy group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The number of carbon atoms of the aryl group and aryloxy group is preferably 6 to 40, more preferably 6 to 30, still 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. Examples of the substituent include the groups described for the substituent T described later.

In the formula (I), R ¹¹ and R ¹² may be bonded to 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 combining R ¹¹ and R ¹² may have a substituent. Examples of the substituent include the groups described for the substituent T described later.

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

The number of carbon atoms of the aliphatic group represented by R ¹³ and R ¹⁴ is preferably 1 to 30, more preferably 1 to 20, still more preferably 1 to 15, particularly preferably 1 to 10, and most preferably 1 to 7. Examples 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. Examples of the substituent include the groups described for the substituent T described later.
The alkyl group preferably has 1 to 30 carbon atoms, more preferably 1 to 20, more preferably 1 to 15, still more preferably 1 to 10, and most preferably 1 to 7. The alkyl group may be linear, branched or cyclic, and is preferably linear or branched, and more preferably linear.
The number of carbon atoms in the alkenyl group is preferably 2 to 30, more preferably 2 to 20, still more preferably 2 to 15, particularly preferably 2 to 10, and most preferably 2 to 7. The alkenyl group may be linear, branched or cyclic, and is preferably linear or branched, more preferably linear.
The number of carbon atoms of the alkynyl group is preferably 2 to 30, more preferably 2 to 20, still more preferably 2 to 15, particularly preferably 2 to 10, and most preferably 2 to 7. The alkynyl group may be linear, branched or cyclic, and is preferably linear or branched, more preferably linear.
The number of carbon atoms in the aralkyl group is preferably 7 to 30, more preferably 7 to 20, and still more preferably 7 to 15. The alkyl part of the aralkyl group is the same as the above alkyl group. The aryl part of the aralkyl group is the same as the following aryl group.

Aromatic groups include aryl groups. The number of carbon atoms in the aromatic group is preferably 6 to 40, more preferably 6 to 30, still more preferably 6 to 20, particularly 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. Examples of the substituent include the groups described for the substituent T described later.

The heterocyclic ring in the heterocyclic group preferably contains a 5-membered or 6-membered saturated or unsaturated heterocyclic ring. The heterocyclic ring may be condensed with an aliphatic ring, an aromatic ring or another heterocyclic ring. Examples of the hetero atom constituting the heterocyclic ring include B, N, O, S, Se and Te, and N, O and S are preferable. The heterocyclic ring preferably has a free valence (monovalent) at the carbon atom (the heterocyclic group is bonded at the carbon atom). The number of carbon atoms of the heterocyclic group is preferably 1 to 40, more preferably 1 to 30, and still more preferably 1 to 20. Examples of the saturated heterocyclic ring 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, benzoselenazole ring, pyridine ring, pyrimidine ring and quinoline ring. The heterocyclic group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.

In the 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 excellent light resistance and moisture resistance. A hydrogen atom or an alkyl group is more preferable, and an alkyl group is particularly preferable because thermal properties are easily obtained. 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, and a straight chain having 1 to 10 carbon atoms. More preferred is an alkyl group, and most preferred is a linear alkyl group having 1 to 7 carbon atoms.

In the formula (I), R ¹³ and R ¹⁴ may be bonded to 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 combining R ¹³ and R ¹⁴ may have a substituent. Examples of the substituent include the groups described for the substituent T described later.

In the formula (I), R ¹⁵ and R ¹⁶ are each independently a hydrogen atom, alkyl group, aryl group, heterocyclic group, acyl group, carbamoyl group, alkoxycarbonyl group, aryloxycarbonyl group, alkylsulfonyl group, arylsulfonyl Or a sulfamoyl group, preferably a hydrogen atom, an alkyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, or an aryloxycarbonyl group, and preferably a hydrogen atom, an alkyl group, an acyl group, or a carbamoyl group. It is more preferably a hydrogen atom because it is easy to obtain excellent light resistance and wet heat resistance.

The alkyl group preferably has 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, and still more preferably 1 to 10 carbon atoms. The alkyl group may be linear, branched or cyclic, and is preferably linear or branched, and more preferably linear. The alkyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The aryl group preferably has 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms, still more 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. Examples of the substituent include the groups described for the substituent T described later.
Examples of the heterocyclic group include the heterocyclic groups described for R ¹³ and R ¹⁴ described above. The heterocyclic group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The acyl group preferably has 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, and still more preferably 2 to 10 carbon atoms. The acyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The carbon number of the carbamoyl group is preferably 1-20, more preferably 1-16, and still more preferably 1-10. The carbamoyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The carbon number of the alkoxycarbonyl group is preferably 2 to 20, more preferably 2 to 15, and still more preferably 2 to 10. The alkoxycarbonyl group may be linear, branched or cyclic, and is preferably linear or branched, and more preferably linear. The alkoxycarbonyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The aryloxycarbonyl group preferably has 7 to 30 carbon atoms, more preferably 7 to 20 carbon atoms, still more preferably 7 to 15 carbon atoms, and most preferably 7 to 12 carbon atoms. The aryloxycarbonyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The alkylsulfonyl group preferably has 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, and still more preferably 1 to 10 carbon atoms. The alkylsulfonyl group may be linear, branched or cyclic, and is preferably linear or branched, and more preferably linear. The alkylsulfonyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The arylsulfonyl group preferably has 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms, still more preferably 6 to 15 carbon atoms, and most preferably 6 to 12 carbon atoms. The arylsulfonyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.
The number of carbon atoms in the sulfamoyl group is preferably 0-20, more preferably 0-15, still more preferably 0-10. The sulfamoyl group may have a substituent. Examples of the substituent include the groups described for the substituent T described later.

(Substituent T)
Examples of the substituent T include the following groups.
A halogen atom (for example, chlorine atom, bromine atom, iodine atom);
Alkyl group [straight chain, branched, cyclic alkyl group. Specifically, a linear or branched alkyl group (preferably a linear or branched alkyl group having 1 to 30 carbon atoms such as 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, such as cyclohexyl group, cyclopentyl group, 4- n-dodecylcyclohexyl group), a bicycloalkyl group (preferably a bicycloalkyl group having 5 to 30 carbon atoms, that is, a monovalent group obtained by removing one hydrogen atom from a bicycloalkane having 5 to 30 carbon atoms. For example, bicyclo [ 1,2,2] heptan-2-yl group, bicyclo [2,2,2] octane-3-yl group) It is intended to encompass such cycloalkyl structures. An alkyl group (for example, an alkyl group of an alkylthio group) in the substituents described below also represents such an alkyl group. ];
Alkenyl group [linear, branched, cyclic alkenyl group. Specifically, a linear or branched alkenyl group (preferably a linear or branched alkenyl group having 2 to 30 carbon atoms, such as vinyl group, allyl group, prenyl group, geranyl group, oleyl group), cycloalkenyl group (Preferably a cycloalkenyl group having 3 to 30 carbon atoms, that is, a monovalent group obtained by removing one hydrogen atom of a cycloalkene having 3 to 30 carbon atoms. For example, a 2-cyclopenten-1-yl group, 2 -Cyclohexen-1-yl group), a bicycloalkenyl group (preferably a bicycloalkenyl group having 5 to 30 carbon atoms, that is, a monovalent group obtained by removing one hydrogen atom of a bicycloalkene having one double bond. , Bicyclo [2,2,1] hept-2-en-1-yl group, bicyclo [2,2,2] oct-2-en-4-yl group) A. ];
An alkynyl group (preferably a linear or branched alkynyl group having 2 to 30 carbon atoms. For example, an ethynyl group, a propargyl group, a trimethylsilylethynyl group;

An aryl group (preferably an aryl group having 6 to 30 carbon atoms, such as a phenyl group, p-tolyl group, naphthyl group, m-chlorophenyl group, o-hexadecanoylaminophenyl group);
Heterocyclic group (preferably a monovalent group obtained by removing one hydrogen atom from a 5- or 6-membered aromatic or non-aromatic heterocyclic compound, more preferably a 5- or 6-membered group having 3 to 30 carbon atoms. Aromatic heterocyclic groups such as 2-furyl group, 2-thienyl group, 2-pyrimidinyl group, 2-benzothiazolyl group);
A cyano group;
A hydroxyl group;
A nitro group;
Carboxyl group;
An alkoxy group (preferably a linear or branched alkoxy group having 1 to 30 carbon atoms, such as a methoxy group, an ethoxy group, an isopropoxy group, a t-butoxy group, an n-octyloxy group or a 2-methoxyethoxy group);
Aryloxy group (preferably an aryloxy group having 6 to 30 carbon atoms. For example, phenoxy group, 2-methylphenoxy group, 4-t-butylphenoxy group, 3-nitrophenoxy group, 2-tetradecanoylaminophenoxy group );
A silyloxy group (preferably a silyloxy group having 3 to 20 carbon atoms, such as a trimethylsilyloxy group or a t-butyldimethylsilyloxy group);
A heterocyclic oxy group (preferably a 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, stearoyloxy group, benzoyloxy group 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, such as a methoxycarbonyloxy group, an ethoxycarbonyloxy group, a t-butoxycarbonyloxy group, or an n-octylcarbonyloxy group);
An aryloxycarbonyloxy group (preferably an aryloxycarbonyloxy group having 7 to 30 carbon atoms, such as a phenoxycarbonyloxy group, a p-methoxyphenoxycarbonyloxy group, a pn-hexadecyloxyphenoxycarbonyloxy group);
An amino group (preferably an amino group, an alkylamino group having 1 to 30 carbon atoms, an anilino group having 6 to 30 carbon atoms. For example, an amino group, a methylamino group, a dimethylamino group, an anilino group, an N-methyl-anilino group , 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, benzoyl Amino group, 3,4,5-tri-n-octyloxyphenylcarbonylamino group);

An aminocarbonylamino group (preferably an aminocarbonylamino group having 1 to 30 carbon atoms. For example, a carbamoylamino group, an N, N-dimethylaminocarbonylamino group, an N, N-diethylaminocarbonylamino group, a morpholinocarbonylamino 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-methoxy group) A carbonylamino group);
An aryloxycarbonylamino group (preferably an aryloxycarbonylamino group having 7 to 30 carbon atoms. For example, a phenoxycarbonylamino group, a p-chlorophenoxycarbonylamino group, an mn-octyloxyphenoxycarbonylamino group);
A sulfamoylamino group (preferably a sulfamoylamino group having 0 to 30 carbon atoms. For example, a sulfamoylamino group, an N, N-dimethylaminosulfonylamino group, an Nn-octylaminosulfonylamino group);
An alkyl or arylsulfonylamino group (preferably an alkylsulfonylamino group having 1 to 30 carbon atoms, an arylsulfonylamino group having 6 to 30 carbon atoms. For example, a methylsulfonylamino group, a butylsulfonylamino group, a phenylsulfonylamino group, 2, 3,5-trichlorophenylsulfonylamino group, p-methylphenylsulfonylamino group);
A mercapto group;
An alkylthio group (preferably an alkylthio group having 1 to 30 carbon atoms, such as a methylthio group, an ethylthio group, or an n-hexadecylthio group);
An arylthio group (preferably an arylthio group having 6 to 30 carbon atoms, such as a phenylthio group, a p-chlorophenylthio group, an m-methoxyphenylthio group);
A heterocyclic thio group (preferably a heterocyclic thio group having 2 to 30 carbon atoms; for example, 2-benzothiazolylthio group, 1-phenyltetrazol-5-ylthio group);

Sulfamoyl group (preferably a sulfamoyl group having 0 to 30 carbon atoms. For example, N-ethylsulfamoyl group, N- (3-dodecyloxypropyl) sulfamoyl group, N, N-dimethylsulfamoyl group, N-acetylsulfuryl group Famoyl group, N-benzoylsulfamoyl group, N- (N′-phenylcarbamoyl) sulfamoyl group);
A sulfo group;
An alkyl or arylsulfinyl group (preferably an alkylsulfinyl group having 1 to 30 carbon atoms, an arylsulfinyl group having 6 to 30 carbon atoms, such as a methylsulfinyl group, an ethylsulfinyl group, a phenylsulfinyl group, a p-methylphenylsulfinyl group);
An alkyl or arylsulfonyl group (preferably an alkylsulfonyl group having 1 to 30 carbon atoms, an arylsulfonyl group having 6 to 30 carbon atoms, such as a methylsulfonyl group, an ethylsulfonyl group, a phenylsulfonyl group, a 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, or a heterocyclic carbonyl group bonded to the carbonyl group at 4 to 30 carbon atoms. Acetyl group, pivaloyl group, 2-chloroacetyl group, stearoyl group, benzoyl group, pn-octyloxyphenylcarbonyl group, 2-pyridylcarbonyl group, 2-furylcarbonyl group);
An aryloxycarbonyl group (preferably an aryloxycarbonyl group having 7 to 30 carbon atoms, such as a phenoxycarbonyl group, an o-chlorophenoxycarbonyl group, an m-nitrophenoxycarbonyl group, a pt-butylphenoxycarbonyl group);
An alkoxycarbonyl group (preferably an alkoxycarbonyl group having 2 to 30 carbon atoms, such as a methoxycarbonyl group, an ethoxycarbonyl group, a t-butoxycarbonyl group, or an n-octadecyloxycarbonyl group);
Carbamoyl group (preferably a carbamoyl group having 1 to 30 carbon atoms. For example, carbamoyl group, N-methylcarbamoyl group, N, N-dimethylcarbamoyl group, N, N-di-n-octylcarbamoyl group, N- (methyl Sulfonyl) carbamoyl group);
Aryl or heterocyclic azo group (preferably an arylazo group having 6 to 30 carbon atoms, a heterocyclic azo group having 3 to 30 carbon atoms. For example, phenylazo group, p-chlorophenylazo group, 5-ethylthio-1,3,4- Thiadiazol-2-ylazo group);
An imide group (preferably N-succinimide group, N-phthalimide group);
Phosphino group (preferably phosphino group having 2 to 30 carbon atoms. For example, dimethylphosphino group, diphenylphosphino group, methylphenoxyphosphino group)
A phosphinyl group (preferably a phosphinyl group having 2 to 30 carbon atoms, such as a phosphinyl group, a dioctyloxyphosphinyl group, a diethoxyphosphinyl group);
A phosphinyloxy group (preferably a phosphinyloxy group having 2 to 30 carbon atoms, such as a diphenoxyphosphinyloxy group, a dioctyloxyphosphinyloxy group);
A phosphinylamino group (preferably a phosphinylamino group having 2 to 30 carbon atoms, such as a dimethoxyphosphinylamino group or a dimethylaminophosphinylamino group);
Examples thereof include a silyl group (preferably a silyl group having 3 to 30 carbon atoms, such as a trimethylsilyl group, a t-butyldimethylsilyl group, and a phenyldimethylsilyl group).

Among the groups listed above, for a group having a hydrogen atom, one or more hydrogen atoms may be substituted with the above substituent T. Examples of such functional groups include an alkylcarbonylaminosulfonyl group, an arylcarbonylaminosulfonyl group, an alkylsulfonylaminocarbonyl group, and an arylsulfonylaminocarbonyl group. Specific examples include methylsulfonylaminocarbonyl group, p-methylphenylsulfonylaminocarbonyl group, acetylaminosulfonyl group, benzoylaminosulfonyl group and the like.

Specific examples of the ultraviolet absorber (I) include the following compounds.

The ultraviolet absorber (I) can be synthesized with reference to the synthesis method described in JP-A-2009-263617.

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

The content of the ultraviolet absorber (I) in the ultraviolet absorbing layer (I) is preferably 0.001% by mass or more, and more preferably 0.01% by mass or more, because more excellent light resistance can be easily obtained. It is more preferable that it is 0.1 mass% or more. Further, the upper limit of the content of the ultraviolet absorber (I) in the ultraviolet absorbing layer (I) is preferably 50% by mass or less, because it is easy to ensure sufficient light transmittance, and is 10% by mass or less. More preferably.

The ultraviolet absorbing layer (I) may contain only one type of ultraviolet absorber (I) or may contain two or more types. When only 1 type of ultraviolet absorber (I) is included, more excellent light resistance and wet heat resistance are easy to be obtained. When two or more kinds of ultraviolet absorbers (I) are contained, an effect of easily absorbing ultraviolet rays in a wider wavelength range can be expected.

The ultraviolet absorbing layer (I) may further contain an ultraviolet absorbent other than the ultraviolet absorbent (I) (hereinafter also referred to as other ultraviolet absorbent). Other UV absorbers include benzotriazole UV absorbers, benzophenone UV absorbers, salicylic acid UV absorbers, salicylate UV absorbers, cyanoacrylate UV absorbers, cinnamate UV absorbers, and oxanilide UV absorbers. Agent, polystyrene UV absorber, polyferrocenylsilane UV absorber, methine UV absorber, azomethine UV absorber, triazine UV absorber, p-aminobenzoic acid UV absorber, cinnamic acid UV absorber Agents, urocanic acid-based UV absorbers.

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

The ultraviolet absorbing layer (I) can contain a polymer from the viewpoint of film forming properties. Further, since the ultraviolet absorbing layer (I) contains a polymer, the ultraviolet absorbing layer (I) can be preferably used as an adhesive layer or the like. The types of high molecular polymers include polyacrylic polymers, polyester polymers, polycarbonate polymers, polyimide polymers, polyacrylamide polymers, polyurethane polymers, epoxy polymers, cellulose polymers, silicone polymers, polyvinyl alcohol polymers. , Polyvinyl alkyl ether polymers, polyvinyl pyrrolidone polymers, and the like. Among these polymer polymers, polyester polymers and polyacrylic polymers have the property of being easily hydrolyzed under acidic conditions. Here, although an acid may be generated as a hydrolyzate of the ultraviolet absorber, the ultraviolet absorber (I) is hardly decomposed even in a high temperature and high humidity environment. Even when used in combination with high-molecular polymers that are easily hydrolyzed under acidic conditions such as these, decomposition of these high-molecular polymers can be suppressed. For this reason, the mechanical properties of the ultraviolet absorbing layer (I) and various performances such as adhesion can be maintained over a long period of time.

The ultraviolet absorbing layer (I) can also contain an adhesive as a polymer. The pressure-sensitive adhesive has an arbitrary form, and examples thereof include an active energy ray-curable pressure-sensitive adhesive, a solvent-type (solution-type) pressure-sensitive adhesive, a hot-melt-type pressure-sensitive adhesive, and an emulsion-type pressure-sensitive adhesive. Examples of the material type of the pressure-sensitive adhesive include those described in the above-mentioned types of polymer.

The content of the polymer in the ultraviolet absorbing layer (I) is preferably 0.1% by mass or more, more preferably 1% by mass or more, and further preferably 10% by mass or more. Further, the upper limit of the content of the 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) can contain a cured product derived from a curable compound. According to this aspect, it can be set as the ultraviolet absorption layer (I) excellent in film forming property and mechanical characteristics. 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, a (meth) allyl group, and a (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 10% by mass or more. Is more preferable. Moreover, it is preferable that the upper limit of content of hardened | cured material derived from the sclerosing | hardenable compound in ultraviolet absorption layer (I) is 100 mass% or less, and it is more preferable that it is 95 mass% or less. Further, the total content of the high molecular weight 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, More preferably, it is 50 mass% or more. Further, the upper limit of the total content of the 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) can 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 according to the use and application site of the ultraviolet absorbing layer (I).

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 circularly polarizing plate, or included between the display panel and the circularly polarizing plate. The ultraviolet absorbing layer (I) may be included in at least one of the display panel and the circularly polarizing plate and between the display panel and the circularly polarizing plate.

In the organic electroluminescent display device of the present invention, the ultraviolet absorbing layer (I) is also preferably used 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, the ultraviolet-absorbing layer (I) accompanying the decomposition of the ultraviolet absorbent (I) or the like Since modification | denaturation etc. can be suppressed, the adhesiveness of various members or layers can be maintained over a long period of time. Specific examples of using the ultraviolet absorbing layer (I) as an adhesive layer include an aspect in which various members and various layers included in a display panel and a circularly polarizing plate are bonded together, and an ultraviolet ray between the display panel and the circularly polarizing plate. The aspect which arrange | positions absorption layer (I) and adhere | attaches both is mentioned, The aspect which arrange | positions ultraviolet-ray absorption layer (I) between a display panel and a circularly-polarizing plate, and adhere | attaches both is preferable.

In the organic electroluminescence display device of the present invention, the ultraviolet absorbing layer (I) can also be used as a planarization layer, a passivation layer, a capping layer, etc. in a display panel.

Next, the circularly polarizing plate used in the organic electroluminescence display device of the present invention will be described. The circularly polarizing plate used in the organic electroluminescence display device of the present invention preferably includes a polarizer and a retardation film.

The polarizer is preferably a so-called linear polarizer having a function of converting natural light into specific linearly polarized light. As the polarizer, for example, an absorptive polarizer can be used. As the absorptive polarizer, a commonly used polarizer can be used. For example, an iodine polarizer, a dye polarizer using a dichroic dye, a polyene polarizer, and a wire grid are used. Any of the polarizers used can be used. In general, iodine-based polarizers and dye-based polarizers can be produced by adsorbing iodine or a dichroic dye to a polyvinyl alcohol-based film and stretching it. As a preferred embodiment of the polarizer, an iodine-stained polyvinyl alcohol film can be mentioned. The polarizer may be a so-called coating type polarizer. As for the coating type polarizer, reference can be made to paragraphs 0052 to 0053 of JP-A No. 2014-170202. 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 and a λ / 2 plate. The circularly polarizing plate used in the present invention preferably uses a λ / 4 plate as a retardation film. Further, a λ / 4 plate and a λ / 2 plate may be used in combination.

Here, the λ / 4 plate is 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. 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 can be converted into circularly polarized light, or circularly polarized light (elliptical polarized light) can be converted into linearly polarized light. 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 incident light is 550 nm, the light passing through the λ / 2 plate has a phase delay value of 275 nm. 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 in combination, 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 is positive. Preferably, the other has 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 circularly polarizing plate used in the present invention may further contain an ultraviolet absorbing layer (I) in addition to the polarizer and the retardation film.

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

As a preferred embodiment of the circularly polarizing plate used in the present invention, an embodiment comprising a polarizer, a retardation film and an adhesive layer can be mentioned. The adhesive layer can be used by being disposed between the polarizer and the retardation film. Moreover, in the case of including other functional layers in addition to the polarizer and the retardation film, between the polarizer and the other functional layers, between the other functional layers, the other functional layers and the retardation film, An adhesive layer can be disposed between and used. Moreover, the adhesion layer may contain the ultraviolet absorber (I). That is, the adhesive layer may be the ultraviolet absorbing layer (I). When the circularly polarizing plate has a plurality of adhesive layers, all of the plurality of adhesive layers may be the ultraviolet absorbing layer (I), and at least one of the plurality of adhesive layers is the ultraviolet absorbing layer (I). May be.

Specific embodiments of the circularly polarizing plate used in the present invention include the following embodiments (1) and (2).
(1) A mode having a polarizer and a λ / 4 plate. In this embodiment, an adhesive layer may be provided between the polarizer and the λ / 4 plate. Moreover, the adhesion layer may contain the ultraviolet absorber (I). Moreover, you may have various functional layers, such as a protective film, in the other surface side of a polarizer, or the surface on the opposite side to the polarizer of (lambda) / 4 board.
(2) A mode having a polarizer, a λ / 4 plate, and a λ / 2 plate disposed between the polarizer and the λ / 4 plate. In this embodiment, an adhesive layer may be provided between the polarizer and the λ / 2 plate and between the λ / 2 plate and λ / 4. Moreover, the adhesion layer may contain the ultraviolet absorber (I). Moreover, you may have various functional layers, such as a protective film, in the other surface side of a polarizer, or the surface on the opposite side to the polarizer of (lambda) / 4 board.

Further, as the circularly polarizing plate, a circularly polarizing plate having a structure described in International Publication WO2013 / 38684 and Japanese Patent Application Laid-Open No. 2015-187717 can be used.

Next, a display panel used in the organic electroluminescence display device of the present invention will be described. The display panel in the present invention includes an organic electroluminescent element. An embodiment of a display panel will be described with reference to FIGS. FIG. 1 is a plan view showing one of the pixels included in the display panel, FIG. 2 is a circuit diagram of the pixel, and FIG. 3 is a schematic diagram corresponding to the line III-III ′ of FIG. It is sectional drawing shown.

As shown in FIGS. 1 and 2, the pixel PX included in the display panel has a wiring portion including a gate wiring GL, a data wiring DL, and a driving voltage wiring DVL. Each of the pixels PX includes a thin film transistor TFT1, TFT2, a thin film transistor TFT1, an organic electroluminescent element OEL connected to the TFT2, and a capacitor Cst. In the embodiment of the present invention, one pixel is connected to one gate line, one data line, and one drive voltage line as an example. However, the present invention is not limited to this. The pixel PX can be connected to one gate line, one data line, and one drive voltage line. One pixel may be connected to at least one gate line, at least one data line, and at least one drive voltage line.

The gate wiring GL is extended in the first direction DR1. The data line DL is extended in the second direction DR2 intersecting with the gate line GL. The drive voltage wiring DVL extends in the substantially same direction as the data wiring DL, that is, in the second direction DR2. The gate line GL transmits a scanning signal to the thin film transistors TFT1 and TFT2, the data line DL transmits a data signal to the thin film transistors TFT1 and TFT2, and the driving voltage line DVL provides a driving voltage to the thin film transistors TFT1 and TFT2.

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

The thin film transistors TFT1 and TFT2 can include a driving thin film transistor TFT2 for controlling the organic electroluminescent element OEL and a switching thin film transistor TFT1 for switching the driving thin film transistor TFT2. In an embodiment of the present invention, it is described that each pixel PX includes two thin film transistors TFT1 and TFT2. However, the present invention is not limited thereto, and each pixel PX may include 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 through the fifth contact hole CH5. The switching thin film transistor TFT1 transmits a data signal applied to the data line DL to the driving thin film transistor TFT2 in accordance with a scanning 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 drive voltage line DVL. The second drain electrode DE2 is connected to the first electrode EL1 through 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 charges and maintains the data signal input to the second gate electrode GE2 of the driving thin film transistor TFT2. The capacitor Cst includes a first common electrode CE1 connected to the first drain electrode DE1 and the sixth contact hole CH6, and a second common electrode CE2 connected to the driving voltage line DVL.

Referring also to FIG. 3, the display panel 200 has a base substrate BS. Examples of the type of base substrate BS include an inorganic substrate and a resin substrate. As the inorganic substrate, for example, a glass substrate, a quartz substrate, a silicon substrate, a silicon nitride substrate, and a composite substrate obtained by depositing molybdenum, titanium, aluminum, copper, or the like on these substrates, a molybdenum substrate, a titanium substrate, an aluminum substrate, A metal substrate such as a copper substrate may be used. Examples of the resin substrate include a polyethylene terephthalate substrate, a polyethylene naphthalate substrate, a polyimide substrate, and a polyethersulfone substrate. The base substrate BS is selected in consideration of mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, water discharge, and the like. The base substrate BS is preferably transparent.

A substrate buffer layer (not shown) may be provided on the base substrate BS. By providing the substrate buffer layer, it is possible to prevent impurities from diffusing into the switching thin film transistor TFT1 and the driving thin film transistor TFT2. Examples of the material for the substrate buffer layer include silicon nitride (SiNx), silicon oxide (SiOx), and silicon nitride oxide (SiOxNy).

A first semiconductor pattern SM1 and a second semiconductor pattern SM2 are arranged on the base substrate BS. The first semiconductor pattern SM1 and the second semiconductor pattern SM2 are formed of a semiconductor material, and operate as active layers of the switching thin film transistor TFT1 and the driving thin film transistor TFT2. The first semiconductor pattern SM1 and the second semiconductor pattern SM2 each include a source part SA, a drain part DRA, and a channel area CA disposed between the source part SA and the drain part DRA. The source part SA and the drain part DRA are doped with N-type impurities or P-type impurities.

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 insulator or an inorganic insulator.

A first gate electrode GE1 and a 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 so as to cover regions corresponding to the drain portions 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 composed of an organic insulator or an inorganic insulator.

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

A passivation layer PL is disposed on the first source electrode SE1 and the first drain electrode DE1, and on the second source electrode SE2 and the second drain electrode DE2. The passivation layer PL serves as a protective film that protects the switching thin film transistor TFT1 and the driving thin film transistor TFT2, and may serve as a planarizing film that planarizes the upper surface thereof. The passivation layer PL may contain the ultraviolet absorber (I) described above. That is, the passivation layer PL may be the ultraviolet absorbing layer (I) described above.

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 a third contact hole CH3 formed in the passivation layer PL.

A pixel defining film PDL that partitions the light emitting layer EML is disposed on the passivation layer PL so as to correspond to each of the pixels PX. The pixel defining film PDL exposes the upper surface of the first electrode EL1 and protrudes from the base substrate BS.

The organic electroluminescent element OEL is disposed in a region surrounded by the pixel defining film PDL. The organic electroluminescent element 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 element 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 transflective 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, ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide), ITZO (indium tin zinc oxide). ) And the like. When the first electrode EL1 is a transflective electrode or a reflective electrode, the first electrode EL1 is selected from Al, Cu, Ti, Mo, Ag, Mg, Pt, Pd, Au, Ni, Nd, Ir, and Cr Preferably, it contains at least one kind of atom.

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. The hole transport region HTR preferably 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 multilayer structure having a single layer made of a single material, a single layer made of a plurality of different materials, or a plurality of layers made of a plurality of different materials. For example, the hole transport region HTR has a single-layer structure made of a plurality of different materials, or a hole injection layer / hole transport layer, a hole injection layer / It may have a structure of 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 has various types such as vacuum deposition method, spin coating method, cast method, LB method (Langmuir-Blodgett), inkjet printing method, laser printing method, laser thermal transfer method (Laser Induced Thermal Imaging, LITI), etc. Can be formed using various methods.

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

The electron transport region ETR is disposed on the light emitting 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 transflective 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). And a mixture thereof. When the second electrode EL2 is a transflective 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) is preferably included. Moreover, the transparent film formed with the reflective film formed with the above-mentioned substance, a semi-transmissive film, ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide), ITZO (indium tin zinc oxide), etc. A plurality of layer structures including a conductive film may be used.

Although not shown, the second electrode EL2 can be connected to the auxiliary electrode. For example, the auxiliary electrode is connected to the second electrode EL2 and has a function of reducing the resistance value of the second electrode EL2.

When the organic electroluminescent element OEL is a front emission type, the first electrode EL1 is a reflection type electrode, and the second electrode EL2 is a transmission type electrode or a semi-transmission type electrode. When the organic electroluminescent element OEL is a back-emitting type, the first electrode EL1 is a transmissive electrode or a transflective electrode, and the second electrode EL2 is a reflective electrode.

In the organic electroluminescent element OEL, when a voltage is applied to each of the first electrode EL1 and the second electrode EL2, holes injected from the first electrode EL1 are emitted through the hole transport region HTR. The electrons transferred to the layer EML and injected from the second electrode EL2 are transferred to the light emitting layer EML via the electron transport region ETR. The electrons and holes recombine in the light emitting layer EML to generate excitons, and the excitons emit light while falling to the ground state in the excited state.

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 electroluminescent element OEL. The capping layer CPL also has a function of protecting the organic layer OL from moisture and / or oxygen. The capping layer CPL is provided with optical characteristics as necessary, and may have a function of improving, for example, 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). 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 the layer located at the bottom. The sealing layer SL may contain the ultraviolet absorber (I) described above. That is, the sealing layer SL may be the ultraviolet absorbing layer (I) described above. 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 composed of an inorganic material such as glass, an organic film, an inorganic film, a laminated film of an inorganic film and an organic film, or 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, a display panel having a configuration described in International Publication Nos. WO2013 / 038864 and JP-A-2008-016379 can be used.

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

4 has a display panel 200, a circularly polarizing plate 100, and an adhesive layer 300 disposed between the display panel 200 and the circularly polarizing plate 100. The organic electroluminescent display device 10 shown in FIG. In the organic light emitting display device 10 shown in FIG. 4, one surface of the adhesive layer 300 is in contact with the circularly polarizing plate 100, and the other surface of the adhesive layer 300 is in contact with the display panel 200.

The organic electroluminescent display device shown in FIG. 4 satisfies any of the following requirements (A-1) to (A-3). In particular, when (A-3) is satisfied, the adhesion between the circularly polarizing plate 100 and the display panel 200 is maintained for a long time even when the organic electroluminescent display device is exposed to high temperature and high humidity. This is a preferred embodiment. In the embodiment (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 the ultraviolet absorbing layer (I).
(A-2) The circularly polarizing plate 100 has the ultraviolet absorbing layer (I).
(A-3) The adhesive layer 300 contains the ultraviolet absorber (I) (that is, the adhesive layer 300 is the ultraviolet absorbing layer (I)).

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

The present invention will be described more specifically with reference to the following examples. The materials, amounts used, ratios, processing details, processing procedures, and the like shown in the following examples can be changed as appropriate 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, each of the compounds (I) -1 to (I) -6 used as the ultraviolet absorber (I) in the following examples is a compound having the following structure. These compounds were synthesized with reference to the synthesis method described in JP2009-263617A.

<Test Example 1>
Example 1-1
63 parts by weight of 2-ethylhexyl acrylate, 9 parts by weight of methyl methacrylate, 15 parts by weight of N-vinyl-2-pyrrolidone, 13 parts by weight of 2-hydroxyethyl acrylate, and 175 parts by weight of ethyl acetate as a polymerization solvent Was put into a separable flask and stirred for 1 hour while introducing nitrogen gas. After removing oxygen in the polymerization system, 0.2 parts by mass of 2,2′-azobisisobutyronitrile was added as a polymerization initiator, and the temperature of the solution was raised to 63 ° C. for 10 hours. I let you. Thereafter, ethyl acetate was added to obtain an acrylic polymer solution having a solid content concentration of 36% by mass. The weight average molecular weight of the acrylic polymer in the acrylic polymer solution was 850,000.

Next, 0.528 parts by mass of an isocyanate crosslinking agent (Takenate D110N, manufactured by Mitsui Chemicals, Inc., 75% active ingredient amount) with respect to 100 parts by mass of the acrylic polymer in the acrylic polymer solution, silane 0.054 parts by mass of a coupling agent (KBM403, manufactured by Shin-Etsu Chemical Co., Ltd., active ingredient amount 100%), 2.700 parts by mass of an ultraviolet absorber (compound (I) -1), a light stabilizer (Tinvin 123, 0.360 parts by mass of BASF Corp. (active ingredient amount 100%) was added and mixed to obtain an acrylic pressure-sensitive adhesive composition.

Next, the acrylic pressure-sensitive adhesive composition was applied on the release-treated surface of a polyethylene terephthalate separator (MRF75, manufactured by Mitsubishi Resin Co., Ltd.) whose surface was subjected to a release treatment so that the thickness after drying was 50 μm. Heat drying at 60 ° C. for 1 minute and heat drying at 140 ° C. for 1 minute, and further aging at 23 ° C. for 120 hours to obtain a pressure-sensitive adhesive sheet (a base material having an acrylic pressure-sensitive adhesive layer / release film configuration) An adhesive sheet) was obtained.

Next, after manufacturing a circularly polarizing plate according to the description in paragraphs 0025 to 0066 of JP-A-2015-187717, the above-mentioned adhesive sheet is bonded to the obtained circularly polarizing plate, and the circularly polarizing plate with an adhesive layer is obtained. Manufactured.

Next, SAMSUNG GALAXY SII equipped with a display panel including an organic electroluminescent element was disassembled, and the circularly polarizing plate was peeled off from the display panel. Next, the release film was peeled off from the above circularly polarizing plate with the pressure-sensitive adhesive layer, and this circularly polarizing plate was bonded to the surface of the display panel from which the above-mentioned circularly polarizing plate was peeled to produce an organic electroluminescent display device.

(Examples 1-2 to 1-6)
Example 1-1 was the same as Example 1-1 except that the same amount of compound (I) -2 to compound (I) -6 was used as the ultraviolet absorber instead of compound (I) -1. An acrylic pressure-sensitive adhesive composition was produced, and an organic electroluminescence display device was produced using this acrylic pressure-sensitive adhesive composition in the same manner as in Example 1-1.

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

(Comparative Example 1-2)
In Example 1-1, 0.05 parts by mass of Tinuvin Carboprotect (manufactured by BASF, benzotriazole-based UV absorber) instead of compound (I) -1 as an ultraviolet absorber, and Tinuvin 1130 (manufactured by BASF, benzo The same procedure as in Example 1-1 was performed except that 0.10 parts by mass of triazole-based UV absorber) and 2.55 parts by mass of Tinuvin 326 (manufactured by BASF, benzotriazole-based UV absorber) were used. An organic electroluminescent display device was produced in the same manner as in Example 1-1 using this acrylic adhesive composition.

[Evaluation]
(Light resistance)
Each of the organic electroluminescence display devices of Examples 1-1 to 1-6 and Comparative Examples 1-1 and 1-2 was installed in an accelerated weathering tester (Super Xenon Weather Meter SX75, manufactured by Suga Test Instruments Co., Ltd.). Then, a light resistance test was performed by irradiating with light for 500 hours in an environment of 60 ° C. and 50% relative humidity. The light emitted from the accelerated weathering tester has a spectrum that approximates sunlight in the outdoors, and a light resistance test simulating outdoor use can be performed. The luminance before light irradiation (A0) and the luminance after light irradiation (A1) are measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.) to calculate the rate of luminance decrease due to light irradiation (A1 / A0). did.

(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 a relative humidity of 90%, and a moisture and heat resistance test was performed. . About the organic electroluminescent display apparatus after a heat-and-moisture resistance test, the presence or absence of the floating and peeling of a circularly-polarizing plate was observed visually, and it evaluated in three steps.
A: Floating and peeling are not recognized at all.
B: Slight lifting or peeling is observed, but there is no practical problem.
C: Floating or peeling occurs on the entire surface, which is not practical.

As shown in Table 1, Examples 1-1 to 1-6 using compounds (I) -1 to (I) -6 as ultraviolet absorbers were more effective than Comparative Examples 1-1 and 1-2. The decrease in luminance was small and the light resistance was excellent.
In Examples 1-1 to 1-6, the circular polarizing plate did not float or peel off the display panel even after the wet heat resistance test, and the adhesion between the display panel and the circular polarizing plate was good. Further, when a light resistance test was conducted using an organic electroluminescence display device after the wet heat resistance test, the brightness of Examples 1-1 to 1-6 was lower than that of Comparative Examples 1-1 and 1-2. It was small.

<Test Example 2>
(Examples 2-1 to 2-6)
Based on Example 3 of JP-A-2016-076441, compounds (I) -1 to (I) -6 were used as the UV absorbers in the UV-absorbing layer 36 described in JP-A-2016-076441. A display panel was manufactured in the same manner as in Example 3 of JP-A-2016-076441 except for the above. A circularly polarizing plate manufactured in accordance with the description in paragraphs 0025 to 0066 of JP-A-2015-187717 is attached to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to manufacture an organic electroluminescent display device. did.

(Comparative Examples 2-1 and 2-2)
Based on Example 3 of Japanese Patent Application Laid-Open No. 2016-076441, a display panel is manufactured using anthracene or carbazole as an aromatic compound or heterocyclic compound in the ultraviolet absorption layer 36 described in Japanese Patent Application Laid-Open No. 2016-076441. did. A circularly polarizing plate manufactured in accordance with the description in paragraphs 0025 to 0066 of JP-A-2015-187717 is attached to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to manufacture an organic electroluminescent display device. did.

For each of the organic electroluminescent display devices of Examples 2-1 to 2-6 and Comparative Examples 2-1 and 2-2, the above light resistance test was performed, and the luminance (A0) before light irradiation and after light irradiation were measured. The luminance (A1) was measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.), and the luminance reduction ratio (A1 / A0) upon light irradiation was calculated.

As shown in Table 2, Examples 2-1 to 2-6 using compounds (I) -1 to (I) -6 as ultraviolet absorbers were more effective than Comparative Examples 2-1 and 2-2. The decrease in luminance was small and the light resistance was excellent. Further, each of the organic electroluminescence display devices was left to stand for 1000 hours in an environment of 80 ° C. and a relative humidity of 90%, and after performing a moisture resistance test, a light resistance test was performed. No. 6 was smaller in luminance than Comparative Examples 2-1 and 2-2, and was excellent in wet heat resistance.

<Test Example 3>
(Examples 3-1 to 3-6)
Based on Example 1 of paragraph Nos. 0032 to 0052 of JP 2008-016379 A, instead of 2- (2′-hydroxy-5′-octylphenyl) -benzotriazole as an ultraviolet absorber in the transparent filling layer 5 A display panel was produced in the same manner as in Example 1 of Japanese Patent Application Laid-Open No. 2008-016379 except that the same amount of the compounds (I) -1 to (I) -6 was used. A circularly polarizing plate manufactured according to the description in paragraphs 0025 to 0066 of JP-A-2015-187717 is attached to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to manufacture an organic electroluminescent display device. did.

(Comparative Example 3-1)
A display panel was manufactured based on Example 1 of paragraph Nos. 0032 to 0052 of JP-A-2008-016379. In manufacturing this display panel, 2- (2′-hydroxy-5′-octylphenyl) -benzotriazole was used as the ultraviolet absorber in the transparent filling layer 5. A circularly polarizing plate manufactured in accordance with the description in paragraphs 0025 to 0066 of JP-A-2015-187717 is attached to this display panel using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to manufacture an organic electroluminescent display device. did.

Each of the organic electroluminescence display devices of Examples 3-1 to 3-6 and Comparative Example 3-1 was subjected to the light resistance test described above, and the luminance before light irradiation (A0) and the luminance after light irradiation (A1) ) Was measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.), and the luminance reduction ratio (A1 / A0) in light irradiation was calculated. In Examples 3-1 to 3-6, the decrease in luminance was smaller than that of Comparative Example 3-1, and the light resistance was excellent. Further, each of the organic electroluminescence display devices was allowed to stand for 1000 hours in an environment of 80 ° C. and a relative humidity of 90%, and after performing a moisture resistance test, a light resistance test was performed. No. 6 had a lower luminance drop than Comparative Example 3-1, and was excellent in wet heat resistance.

<Test Example 4>
(Examples 4-1 to 4-6)
Circles of paragraph numbers 0236 to 0269 of International Publication No. WO2013 / 038864, except that the same mass of compounds (I) -1 to (I) -6 was used instead of Tinuvin 928 (manufactured by BASF) as an ultraviolet absorber. A circularly polarizing plate was manufactured according to the manufacturing method of the polarizing plate 101. Next, GALAXY SII manufactured by SAMSUNG on which a display panel including an organic electroluminescent element was mounted was disassembled, and the circularly polarizing plate was peeled off from the display panel. Next, the above-mentioned circularly polarizing plate was attached to the surface of the above-mentioned display panel from which the above-mentioned circularly polarizing plate was peeled, using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to produce an organic electroluminescence display device.

(Comparative Example 4-1)
A circularly polarizing plate was manufactured according to the manufacturing method of the circularly polarizing plate 101 of paragraph numbers 0236 to 0269 of International Publication WO2013 / 038864. In manufacturing this circularly polarizing plate, Tinuvin 928 (manufactured by BASF) was used as an ultraviolet absorber. Next, GALAXY SII manufactured by SAMSUNG on which a display panel including an organic electroluminescent element was mounted was disassembled, and the circularly polarizing plate was peeled off from the display panel. Next, the above-mentioned circularly polarizing plate was attached to the surface of the above-mentioned display panel from which the above-mentioned circularly polarizing plate was peeled, using an adhesive (SK2057, manufactured by Soken Chemical Co., Ltd.) to produce an organic electroluminescence display device.

The organic light-emitting display devices of Examples 4-1 to 4-6 and Comparative Example 4-1 were subjected to the light resistance test described above, and the luminance before light irradiation (A0) and the luminance after light irradiation (A1) ) Was measured using a luminance meter CS2000 (manufactured by Konica Minolta Sensing Co., Ltd.), and the luminance reduction ratio (A1 / A0) in light irradiation was calculated. In Examples 4-1 to 4-6, the decrease in luminance was smaller than that of Comparative Example 4-1, and the light resistance was excellent. Further, each of the organic electroluminescence display devices was left to stand for 1000 hours in an environment of 80 ° C. and a relative humidity of 90%, and after performing a moisture resistance test, a light resistance test was performed. No. 6 had a lower luminance drop than Comparative Example 4-1, and was superior in heat and moisture resistance.

10: organic electroluminescent display device 100: circularly polarizing plate 200: display panel BS: base substrate CA: channel region CE1: common electrode CE2: common electrodes CH1 to CH6: contact hole CPL: capping layer Cst; capacitor DE1: first drain Electrode DE2: Second drain electrode DL: Data wiring DRA: Drain portion DVL: Drive voltage wiring EL1: First electrode EL2: Second electrode EML: Light emitting layer ETR: Electron transport region GE1: First gate electrode GE2: Second gate Electrode GI: Gate insulating layer GL: Gate wiring HTR: Hole transport region IL: Insulating layer OEL: Organic electroluminescent element OL: Organic layer PDL: Pixel defining film PL: Passivation layer PX: Pixel SA: Source part SE1: First Source electrode SE2: Second source electrode SL: Sealing layer SM1: First semiconductor pattern S 2: second semiconductor patterns TFT 1: thin film transistor (switching TFT)
TFT2: Thin film transistor (driving thin film transistor)

Claims

An organic electroluminescent display device including a display panel including an organic electroluminescent element, and a circularly polarizing plate disposed on the display panel,
At least one of the display panel and the circularly polarizing plate has an ultraviolet absorbing layer containing an ultraviolet absorber represented by the formula (I), or the formula (I) is provided between the display panel and the circularly polarizing plate. An organic electroluminescent display device having an ultraviolet absorbing layer containing an ultraviolet absorber represented by:

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 represents 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 represents 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 organic electroluminescent display device according to claim 1, wherein R 11 and R 12 in the formula (I) are hydrogen atoms.
The organic electroluminescent display device according to claim 1, wherein R 13 and R 14 in the formula (I) are a hydrogen atom or an alkyl group.
The organic according to any one of claims 1 to 3, wherein in the 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. Electroluminescent display device.
The organic electroluminescence display device according to any one of claims 1 to 4, wherein the ultraviolet absorbing layer contains a polymer.
The polymer is a polyacrylic polymer, polyester polymer, polycarbonate polymer, polyimide polymer, polyacrylamide polymer, polyurethane polymer, epoxy polymer, cellulose polymer, silicone polymer, polyvinyl alcohol polymer, polyvinyl. The organic electroluminescent display device according to claim 5, which is at least one selected from alkyl ether polymers and polyvinylpyrrolidone polymers.
The organic electroluminescent display device according to claim 5, wherein the polymer is at least one selected from a polyester polymer and a polyacrylic polymer.
The organic electroluminescence display device according to claim 5, wherein the polymer is an adhesive.
The ultraviolet absorbing layer is provided between the display panel and the circularly polarizing plate, one surface of the ultraviolet absorbing layer is in contact with the display panel, and the other surface of the ultraviolet absorbing layer is in contact with the circularly polarizing plate. The organic electroluminescent display device according to any one of claims 1 to 8.
The organic electroluminescent display device according to any one of claims 1 to 8, wherein the circularly polarizing plate includes the ultraviolet absorbing layer.
The organic electroluminescent display device according to claim 10, wherein the circularly polarizing plate includes a polarizer, a retardation film, and the ultraviolet absorbing layer.
The organic electroluminescent display device according to any one of claims 1 to 8, wherein the display panel includes the ultraviolet absorbing layer.
The organic electroluminescent display device according to claim 12, wherein the display panel includes an organic electroluminescent element, a capping layer, and the ultraviolet absorbing layer disposed between the organic electroluminescent element and the capping layer. .
13. The organic electroluminescent display device according to claim 12, wherein the display panel includes an organic electroluminescent element and a capping layer, and the capping layer is the ultraviolet absorbing layer.