JP2008311044A - Area light-emitting version organic el display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic EL display panel of an areal light-emission type capable of restraining unwanted viewing caused by differences of reflection factors or color hues among electrodes, sub electrodes and organic EL layers and their surroundings. <P>SOLUTION: At least a transparent first support body, a first electrode, an organic EL layer, a second electrode, and a second support body are laminated in that order, and a light-emitting area is opened between the first electrode and the second electrode, an insulating layer is formed zoned so as to cover a non-emission area with a first support body side as a light-taking out side (also said to be an observer side), for the area light-emitting type organic EL display panel. The second electrode is formed of a black material with a low reflection factor in order to restrain unnecessary viewing due to differences of reflection factors or color hues of each part, and further, a viewing restraint layer made of a black material with a low reflection factor is arranged at a non-emission area. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a simple area emission type organic EL display panel used for POP (Point Of Purchase advertising) or the like.

  In recent years, various types of display panels have been developed along with the reduction in size and size of display devices. As a display panel that stably displays individual characters and designs with high brightness, POP and the like are light-emitting organic types. EL display panels have come to be used in terms of merits such as being a solid element and self-luminous.

A display device used for an organic EL display panel is also called an organic EL display device, and an organic EL element (also referred to as an organic electroluminescence element) using an organic EL layer using an organic compound as a fluorescent material is used as a light emitting element. is there.
In the organic EL element, holes and electrons injected from two opposing electrodes are combined in the light emitting layer, and the fluorescent material in the light emitting layer is excited by the energy to emit light of a color corresponding to the fluorescent material. The device is self-luminous and has high visibility, and since it is a complete solid-state device, it has excellent characteristics such as impact resistance. However, it is particularly bright even at a low voltage of less than 10 V applied. There are advantages such as high light emission efficiency such as realization of light emission, light emission with a simple element structure, high brightness and long life.
In addition, the organic EL element is a laminated structure in which a hole transport layer, a light emitting layer, and an electron injection layer are mainly formed between an anode and a cathode, and each layer can be formed with a thickness of nanometer unit. There is an advantage that it is easy to reduce the thickness and weight.
Furthermore, each of these layers can be manufactured by applying a coating solution in which a polymer material is dissolved, so that it is possible to apply a manufacturing method that applies a printing method to paper or a manufacturing method that applies an ink jet method. There is also.

An organic EL display device as a display device used for the organic EL display panel is usually formed by laminating a first electrode, an organic EL layer, and a second electrode in this order on a base material, and the first A transparent first support is disposed on the outer side of the electrode side, a second support is disposed on the outer side of the second electrode side, and a predetermined one or more of the first electrode and the second electrode are used. The area selectively emits light, and the first support side is set as a light emission extraction side (also referred to as an observer side).
For example, a bottom emission type area light emitting organic EL having a configuration as shown in FIG. 8 and having the second electrode 25 side as a cathode and the first support 11 side as a light emission extraction side (also referred to as an observer side). A display panel is mentioned.
Note that the EL layer is an electroluminescence layer, and here means a layer configuration of one or more layers for contributing to light emission between electrodes, an organic light emitter layer is essential, and an organic light emitter (organic fluorescent light emission). A second form consisting of an organic light emitter layer, a positive hole transport layer on the anode side, and an electron transport layer on the cathode side. The organic light emitting layer having the properties of the hole transport layer and the electron transport layer on the cathode side are the third embodiment, the organic light emitter layer having the properties of the electron transport layer, and the holes on the anode side. The 4th form which consists of a transport layer is mentioned.
For example, as an area light-emitting organic EL display panel, a pattern in which an insulating layer is patterned and the entire light-emitting area emits light uniformly, or an organic EL is emitted with an active matrix or a passive matrix, and a gray scale using a complex circuit is used. Some types are controlling.
About the type which light-emits uniformly the whole light emission area, Unexamined-Japanese-Patent No. 2004-111158 (patent document 1) and Unexamined-Japanese-Patent No. 2002-231446 (patent document 2) have description.
JP 2004-111158 A JP 2002-231446 A

In an organic EL display device used for such an area light emission type organic EL display panel, for example, as shown in FIG. 8, the second electrode 25 side is a cathode, and the first support 11 side is a light emission extraction side ( In the case of the bottom emission type, the second electrode (cathode) 25 and the auxiliary electrode 27 that are formed are metal materials having high reflectivity. Therefore, the reflectivity is outside the formation region. It is easy to see because there is a big difference, and since the color is tinged with a metallic luster color, it is easy to see compared with the surroundings where it is not formed, and also in the organic EL layer 40 that constitutes it However, since it is slightly tinged with color, there is a problem that it is easier to visually recognize than the region other than the region where the organic EL layer 40 is formed.
For this reason, for example, when an organic EL display device is used as a poster medium by enlarging a selection unit area (also referred to as a pixel) for selecting light emission, the eye catching effect is inferior due to the above-described problems.

As described above, recently, a simple light-emitting organic EL display panel has come to be used for POP and the like because of the merit of solid-state self-light emission. In the organic EL display device to be used, for example, in the case of the bottom emission type, it is visually recognized due to a difference in reflectance and a hue between the cathode, auxiliary electrode, and organic EL layer to be formed, and their surroundings. There was a problem that it was easy, and this response was required.
This invention respond | corresponds to this, The light emission which can suppress the unnecessary visual recognition resulting from the difference in a reflectance and a hue | tone between the electrode which comprises, an auxiliary electrode, and an organic electroluminescent layer, and those circumference | surroundings. An organic EL display panel of a type is to be provided.

In the light-emitting organic EL display panel of the present invention, at least a transparent first support, a first electrode, an organic EL layer, a second electrode, and a second support are stacked in this order. A light-emitting region is opened between the first electrode and the second electrode, a partitioned insulating layer is formed so as to cover the non-light-emitting region, and the first support side is referred to as the light emission extraction side (also referred to as the observer side). The second electrode is made of a black material having a low light reflectance in order to suppress unnecessary visual recognition due to a difference in reflectance or a difference in hue of each part. And the visual suppression layer which consists of a black material with low light reflectance is arrange | positioned in the non-light-emitting area | region, It is characterized by the above-mentioned.
In the light-emitting organic EL display panel, the visual suppression layer is characterized in that the insulating layer is made of a black material, and the black material is made of a black pigment resist. It is characterized by.
Here, the low light reflectance means that the reflectance is low enough to suppress visual recognition, and preferably the spectral reflectance defined in JIS Z 8722 is 20% or less.
The pigment resist is obtained by developing from a photosensitive resist containing a pigment by a photolithography method.
Or it is the said light emission type organic electroluminescence display panel, Comprising: The said visual suppression layer is a light reflectance of shielding the non-light-emitting area | region and the area | region where either of an organic EL layer and the 2nd electrode is not laminated | stacked. It is a light-shielding layer made of a low black material, and is disposed on the light emission extraction side from the first electrode, on one surface of the first support, or on one surface of the third support. The black material of the light shielding layer is made of black ink.

In any one of the above-described light-emitting organic EL display panels, the entire surface of the light-emitting portion and the non-light-emitting portion is covered outside the first support, the visual suppression layer, and the third support. Further, a semi-transparent semi-reflective layer is disposed outside the polarizing plate, and a light-transmitting layer is disposed outside the semi-transmissive semi-reflective layer. A pattern layer is provided, and a transflective layer is arranged on one surface side of the fourth support.
In any of the above, the total light transmittance of the transflective layer is represented by a total light transmittance T (%) defined in JIS K7136, and is in a range of 20% to 80%. It is what.
The light-emitting organic EL display panel according to any one of claims 7 to 9, wherein a transparent protective layer is disposed on the pattern layer.
The light-emitting organic EL display panel according to any one of claims 7 to 10, wherein the pattern layer is formed by direct coating or other transparent support having a pattern layer coated thereon. It is characterized by being pasted and disposed.
Here, the outer side means the side opposite to the light emitting side, and the inner side means the light emitting side.
The “outside of the first support, the visual suppression layer, and the third support” referred to herein is the outer side of the first support and the visual suppression layer, and the third support. If there is, it means that it is also outside.

  Moreover, in any one of the above-described light emitting organic EL display panels, the first support, the second support, the third support, and the transparent support coated with the pattern layer are flexible. It is a plastic substrate.

In addition, any one of the above light-emitting organic EL display panels is a passive matrix type.
Alternatively, any one of the light-emitting organic EL display panels described above, which is an active matrix type.

  In addition, any one of the above-described light emitting organic EL display panels is an organic light emitting poster.

  The light-emitting organic EL display panel according to any one of the above items, further comprising a color filter layer, and color conversion between the color filter layer and the transparent electrode. A phosphor layer is provided.

(Function)
The light-emitting organic EL display panel according to the present invention has such a configuration, and is unnecessary due to a difference in reflectance and color between the electrode, auxiliary electrode, and organic EL layer to be formed and their surroundings. It is possible to provide a light-emitting organic EL display panel that can suppress visual recognition.
Specifically, in order to suppress unnecessary visual recognition due to the difference in reflectance and hue of each part, the second electrode is formed of a black material having a low light reflectance, and light is reflected in the non-light emitting region. This is achieved by providing a visual suppression layer made of a black material with a low rate.
Specifically, the second electrode is made of a black material having a low light reflectance, so that the second electrode can be effectively prevented from being visually recognized by the reflected light. By providing a visual suppression layer made of a low black material, it is possible to suppress visual recognition due to differences in reflectance and hue between one or more of the auxiliary electrode and organic EL layer and their surroundings. It is said.
More specifically, the visual suppression layer is the one in which the insulating layer is made of a black material. The form of the invention of claim 2, the visual suppression layer includes a non-light emitting region, an organic EL layer, and a second layer. A light-shielding layer made of a black material having a low light reflectivity, which shields a region where any of the electrodes is not laminated, on one side of the light emission extraction side or the first support from the first electrode Alternatively, the form of the invention of claim 4 is provided, which is disposed on one surface side of the third support.
In the case of the form of invention of Claim 2, the said black material has the aspect which consists of a black pigment resist.
Moreover, in the case of the form of invention of Claim 4, the black material of the said light shielding layer has the aspect which consists of black ink.

  The form of the invention of claim 6, wherein a polarizing plate is bonded to the outside of the first support, the visual suppression layer, and the third support so as to cover the entire surface of the light emitting part and the non-light emitting part. By doing so, it is effective to blur the edge visual recognition which is unnecessary visual recognition in the display region other than the region covered with the visual suppression layer.

The invention according to claim 7, wherein a transflective layer is disposed outside the polarizing plate, and a light-transmitting pattern layer is disposed outside the transflective layer. When the pattern layer is disposed on the entire surface of the panel on the light emission extraction side and outside, the pattern layer is not affected by the color of the layer below the pattern layer (second support side). The problem that the layer becomes inconspicuous due to the color of the lower layer (second support side) and the problem that the edge of the light shielding layer opening is noticeable can be solved.
In this form, a form in which the transflective layer is disposed on the one surface side of the fourth support can be mentioned.
Another example is a mode in which a semi-transmissive / semi-reflective layer is disposed on one surface of the polarizing plate.
The total light transmittance of the transflective layer is expressed by the total light transmittance T (%) defined in JIS K7136, and is particularly effective when it is in the range of 20% to 80%.
Moreover, when the transparent protective layer is arrange | positioned in the pattern layer, protection of a pattern layer can be ensured.
Examples of the pattern layer include those formed by direct coating or by attaching another transparent support on which the pattern layer is coated.
The paint for the pattern layer is preferably a transparent colored ink.

  The first support, the second support, the third support, and the transparent support coated with a pattern layer are flexible plastic substrates. By doing so, it is possible to cope with thermal changes and external forces, and its uses are widened.

  Moreover, the form which is a passive matrix type and the form which is an active matrix type are mentioned.

  In particular, it is effective in the case of an organic light emitting poster.

  The form provided with the color filter layer is mentioned, The form provided with the color conversion fluorescent substance layer between this color filter layer and the said transparent electrode is mentioned.

  As described above, the present invention is a light emitting type that can suppress unnecessary visual recognition due to a difference in reflectance and hue between the electrode, auxiliary electrode, and organic EL layer constituting the electrode and the periphery thereof. The organic EL display panel can be provided.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic cross-sectional view of a first example of an embodiment of a light-emitting organic EL display panel of the present invention, and FIG. 1B is a diagram of an embodiment of the light-emitting organic EL display panel of the present invention. FIG. 2A is a schematic sectional view of a second example, FIG. 2A is a schematic sectional view of a third example of the embodiment of the light emitting organic EL display panel of the present invention, and FIG. FIG. 3A is a schematic sectional view of a fifth example of the embodiment of the light-emitting organic EL display panel of the present invention. FIG. 3B is a schematic sectional view of a sixth example of the embodiment of the light emitting organic EL display panel of the present invention, and FIG. 4A is a diagram of the embodiment of the light emitting organic EL display panel of the present invention. FIG. 4B is a schematic cross-sectional view of the seventh example, and FIG. 4B is a schematic cross-sectional view of the eighth example of the embodiment of the light-emitting organic EL display panel of the present invention. FIG. 5B is a schematic cross-sectional view of a ninth example of the embodiment of the light-emitting organic EL display panel of the present invention, and FIG. 5B is a schematic diagram of the tenth example of the embodiment of the light-emitting organic EL display panel of the present invention. FIG. 6A is a cross-sectional view schematically showing a stacked configuration of the organic EL display device body of the light-emitting organic EL display panel of the first example shown in FIG. FIG. 7B is an enlarged cross-sectional view of the light-emitting portion showing the patterning of the insulating layer in an easy-to-understand manner, and FIGS. 7A to 7D are cross-sectional views schematically showing the laminated structure of the organic EL layer of the light-emitting portion. is there.
1 to 8, 11 is a first support, 12 is a second support, 13 is a third support, 14 is a fourth support, and 20 is a first electrode (here, an anode). ), 25 is a second electrode (here, a cathode), 25B is a second electrode (made of a black material), 27 is an auxiliary electrode, 30 is an insulating layer, 30B is an insulating layer (made of a black material), and 40 is Organic EL layer, 50 is a sealing material, 60 is a light emitting region, 65 is an overlapping region of the second electrode and the organic EL layer, 70 is a light shielding layer (also referred to as a visual suppression layer), and 70B is a light shielding layer (made of a black material). , 75 is a polarizing plate (also referred to as a circularly polarizing plate), 76 is a transflective layer (semitransmissive layer), 77 is a pattern layer, 80 is an organic EL display device body (also referred to as a display panel body), and 81 is a light emitting portion. , 82 is a flexible substrate (also referred to herein as a first support), 83 is a barrier layer, and 84 is a first electrode ( Here, anode), 85 is an organic EL layer, 85a is an organic light emitter layer, 86 is a second electrode (here, cathode), 87 is a barrier layer, and 88 is a flexible sealing substrate (here, second support). 89) is an insulating layer (also called an insulating layer portion, here is a photoresist), 89A is an opening, 90 is an encapsulant, 91 is a hole transport layer, 92 is an organic light emitting layer, and 93 is an electron. A transport layer, 94 is an organic light emitting layer / hole transport layer, and 95 is an electron transport layer / organic light emitter layer.

First, a first example of an embodiment of a light emitting organic EL display panel according to the present invention will be described with reference to FIG.
The light-emitting organic EL display panel of the first example includes a transparent first support 11, a first electrode 20, an organic EL layer 40, a second electrode 25B, and a second support 12 stacked in this order. In addition, a partitioned insulating layer 30B is formed between the first electrode 20 and the second electrode 25 so as to open the light-emitting region and cover the non-light-emitting region. A light-emitting organic EL display panel whose side is a light emission extraction side (also referred to as an observer side). In particular, the second electrode 25B is formed of a black material having a low light reflectance, and the insulating layer 30B. Is formed from a black material having a low light reflectance to form a visual suppression layer.
As described above, the second electrode 25B is made of a black material having a low light reflectance, so that the second electrode 25B is effectively suppressed from being visually recognized by the reflected light, and light is reflected in the non-light emitting region. By disposing the insulating layer 30B made of a black material having a low rate as a visual suppression layer, a difference in reflectance and a color difference between one or more of the auxiliary electrode 27 and the organic EL layer 40 and their surroundings. It is possible to suppress visual recognition due to.
The light-emitting organic EL display panel of the first example is the same as the conventional light-emitting organic EL display panel shown in FIG. 8, but the second electrode 25 is made of a black material with low light reflectance, and the insulating layer 30 is light This is a black material with low reflectivity.
Examples of the black material for forming the second electrode 25B include ruthenium oxide, and examples of the black material for forming the insulating layer 30B include a black pigment resist.

FIG. 6A is a cross-sectional view schematically showing the stacked configuration of the organic EL display device body of the light-emitting organic EL display panel of the first example.
Here, as the first support body 11 and the second support body 12, a flexible plastic base material is used. However, the present invention is not limited to this.
In the case of a flexible plastic base material, it can cope with a heat change and an external force, and its application is widened.
Further, an enlarged cross-sectional view of the light emitting portion showing the patterning of the insulating layer 30B (corresponding to 89 in FIG. 6B) in an easy-to-understand manner is as shown in FIG. 6B.
The patterned insulating layer 30B defines a light emitting region having a predetermined shape, and the non-light emitting region other than the light emitting region or the light emitting region represents, for example, a display pattern composed of characters, figures, symbols, or a combination thereof.
In FIG. 6B, the opening 89A of the insulating layer 89 (corresponding to 30 in FIG. 1A) corresponds to a light emitting region, and the other region covered by the insulating layer 30 is a non-light emitting region.
In the first example, the insulating layer 30 </ b> B is disposed between the first electrode 11 and the organic EL layer 40. However, the patterned insulating layer is disposed between the organic EL layer 40 and the second electrode 12. The form which arrange | positions 30B is also mentioned.

Next, other parts will be described with reference to FIG.
(Flexible substrate 82)
The flexible base material 82 shown in FIG. 6 corresponds to the support body 11 shown in FIG. 1A, and here, the support body 11 shown in FIG. .
The flexible substrate 82 (corresponding to the support 11 shown in FIG. 1A) is provided on the surface on the viewer side in the light emitting organic EL display panel of the first example.
Therefore, this flexible base material 82 has a display pattern (hereinafter referred to as “characters, etc.”) that is displayed as a light-emitting display region or a non-light-emitting region when the organic EL layer 40 emits light. “).” Is transparent so that an observer can easily see.
As the flexible base material 82, a film-like resin base material or a thin glass plate having a thickness of about 100 μm or less and provided with a protective plastic plate or a protective plastic layer is used.
Such a base material is preferably used as a base material for a light-emitting display panel that can be mounted or installed on various objects because it has excellent flexibility and can be rounded or bent.

The resin material for forming the flexible base material 82 is not particularly limited as long as it has sufficient flexibility as a base material for a light-emitting display panel in the state after formation. , Polyethylene, polypropylene, polyvinyl chloride, polyvinyl fluoride, polystyrene, ABS resin, polyamide, polyacetal, polyester, polycarbonate, modified polyphenylene ether, polysulfone, polyarylate, polyetherimide, polyamideimide, polyimide, polyphenylene sulfide, liquid crystal Polyester, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyoxymethylene, polyethersulfone, polyetheretherketone, polyacrylate, acrylonitrile-styrene resin Phenolic resins, urea resins, melamine resins, unsaturated polyester resins, epoxy resins, polyurethane, silicone resin, amorphous polyolefins, and the like.
Other resin materials can be used as long as they satisfy the conditions that can be used for light-emitting display panels, and are copolymerized using two or more types of monomers that are starting materials for the above-described resins. It may be a copolymer obtained.

Of these resinous substrates, those having good solvent resistance and heat resistance, and those having good gas barrier properties such as water vapor and oxygen are more preferred, depending on the application.
In the case of using a resin material having a good gas barrier property, a barrier layer 83 to be described later can be omitted, but in the light emitting display panel of this example, the flexible substrate 2 on which the barrier layer 83 is formed is used. preferable.
A flexible base material is manufactured by extrusion molding etc. so that it may become a film-form base material of thickness 50-200 micrometers.

In addition, a thin glass plate with a thickness of about 100 μm or less provided with a protective plastic plate or a protective plastic layer is excellent in flexibility and can be rounded or bent. Used.
At this time, it is more preferable to use a protective plastic plate or a protective plastic layer having a good gas barrier property.

By setting the thickness of the flexible substrate 82 within the above range, preferable flexibility can be imparted to the light-emitting display panel.
When the obtained light-emitting display panel is installed in a complicated shape or used as a display device of a portable device, the light-emitting display panel can be thinned to 50 μm to 100 μm to 400 μm. It is possible to realize the thinness unique to the light-emitting display panel for advertisement.

(Barrier layer 83)
The barrier layer 83 is a layer that acts to block moisture (water vapor) and oxygen that adversely affect the life and light emitting performance of the organic EL layer 85.
The barrier layer 83 is not an essential layer in the light emitting display panel of the present invention, but is a layer that is preferably formed between the flexible substrate 82 and the first electrode 84 described above.
This barrier layer 83 also needs to be transparent, like the above-described flexible substrate.

As the barrier layer 83, an inorganic oxide thin film is preferably applied.
Examples of the inorganic oxide include silicon oxide, aluminum oxide, titanium oxide, yttrium oxide, germanium oxide, zinc oxide, magnesium oxide, calcium oxide, boron oxide, strontium oxide, barium oxide, lead oxide, zirconium oxide, sodium oxide, Examples thereof include lithium oxide and potassium oxide, and one or more of these can be used.
Among these, silicon oxide, aluminum oxide, or titanium oxide is preferably used. Moreover, silicon nitride can be mentioned as things other than an inorganic oxide.
The thickness of the barrier layer 83 provided in the light emitting organic EL display panel of this example is preferably 0.01 to 0.5 μm.

The barrier layer 83 includes the above-described flexible substrate 82 (corresponding to the first support 11 in FIG. 1A) and the first electrode 84 (corresponding to the first electrode 20 in FIG. 1A). In the meantime, it is formed on the flexible substrate 82 by physical vapor deposition such as reactive sputtering or vacuum vapor deposition.
As a film forming apparatus for the barrier layer 83, a vapor deposition apparatus capable of physical vapor deposition while transporting the above-described film-like flexible substrate 82 by roll-to-roll is used.

(First electrode 84, second electrode 86)
The first electrode 84 and the second electrode 86 shown in FIG. 6 correspond to the first electrode 20 and the second electrode 25B shown in FIG. 1A, respectively. Here, in FIG. Here, the first electrode 20 and the second electrode 25B are also referred to as a first electrode 84 and a second electrode 86, respectively.
The first electrode 84 and the second electrode 86 are indispensable layers provided for applying an electric field to the organic EL layer 85 described later.
The electrode provided on the flexible substrate 82 side when viewed from the organic EL layer 85 is referred to as a first electrode 84, and the electrode provided on the flexible sealing substrate 88 side is referred to as a second electrode 86.
Regarding transparency, here, the first electrode 84 has transparency as in the case of the flexible substrate 82 and the barrier layer 83 described above, but is not limited thereto.
Here, the second electrode 86 (corresponding to 25B in FIG. 1) is a black material having a low light reflectance.

  Examples of the first electrode 84 include thin film electrode materials such as indium tin oxide (ITO), indium oxide, indium zinc oxide (IZO), gold, and polyaniline. Among these, indium tin oxide (ITO) and indium zinc oxide (IZO), which are transparent oxides, are preferably used.

Examples of the second electrode 86 include Cr—Co—Mn—Fe, Cr—Cu, Cr—Cu—Mn, Mn—Fe—Cu, Cr—Co—Fe, Co—Mn—Fe, and Co—Ni—Cr. -Fe and other complex oxides, manganese oxide (MnO ₂ ), molybdenum oxide (MoO ₂ ), chromium oxide (Cr ₂ O ₃ ), copper oxide (CuO), palladium oxide (PdO), ruthenium oxide (RuO ₂ ), etc. These may be used alone or in combination.
Further, in order to increase the conductivity, they are laminated or combined with gold, silver, copper, aluminum, platinum, nickel and palladium.

  Here, the first electrode 84 and the second electrode 86 are an anode and a cathode, respectively. When the anode is used, it is preferably formed of a conductive material having a high work function so that holes can be easily injected (for example, indium tin oxide (ITO)). In order to facilitate, it is preferable to form the conductive material with a small work function (for example, metallic calcium).

  The thickness of each of the first electrode 84 and the second electrode 86 is preferably 0.005 to 0.5 μm, and is usually adjacent to the organic EL layer 85 by sputtering, vacuum deposition, printing, or the like. Provided.

The first electrode 84 and the second electrode 86 may be formed on the entire surface, or may be formed in a pattern so as to correspond to the position where the organic EL layer 85 is formed.
The patterned electrode is formed by etching with a photosensitive resist after being formed on the entire surface.

(Organic EL layer 85)
The organic EL layer 85 shown in FIG. 6 corresponds to the organic EL layer 40 shown in FIG. 1A, and the organic EL layer 40 shown in FIG.
The organic EL layer 85 is an essential layer in the light emitting display panel.
Examples of the configuration of the organic EL layer 85 include various layer configurations as shown in FIGS. 7 (a) to 7 (d).

  The organic EL layer 85 shown in FIG. 7A is an embodiment in which an organic light emitting layer 85a exclusively including an organic light emitting body (also referred to as an organic fluorescent light emitting body) is formed as an organic EL layer 85 between the electrodes. In the organic EL layer 85 shown in FIG. 7B, a hole transport layer 91 made of a hole transport material is formed on the anode side of the organic light emitter layer 92, and an electron transport material is made on the cathode side of the organic light emitter layer 92. The organic EL layer 85 shown in FIG. 7C is formed with an organic light-emitting layer 94 having the properties of a hole transport layer, and the organic light-emitting layer 94 is formed. The organic EL layer 85 shown in FIG. 7D is formed with an organic light-emitting layer 95 having the properties of an electron transport layer, and the organic light-emitting layer is formed. In this embodiment, the hole transport layer 91 is formed on the anode side of the layer 95.

Although not shown, the organic EL layer 85 has a stacked structure of a hole transport material / organic light emitter mixed layer formed by mixing at least a hole transport material and an organic light emitter, and an electron transport layer. It may also be a laminated structure of a mixed layer of an organic light emitter / electron transport material formed by mixing at least both an organic light emitter and an electron transport material, and a hole transport layer. .
Furthermore, the organic EL layer 85 may be composed of a mixed layer in which at least three of a hole transport material, an organic light emitter, and an electron transport material are mixed.

For the organic light emitter layer 92 containing an organic light emitter, an azo compound that is generally used as an organic EL layer is used, but an azo compound to which another organic light emitter is added may be used.
Such other organic light emitters include pyrene, anthracene, naphthacene, phenanthrene, coronene, chrysene, fluorene, perylene, perinone, diphenylbutadiene, coumarin, styryl, pyrazine, aminoquinoline, imine, diphenylethylene, merocyanine, quinacridone or rubrene, Or what is normally used as organic light-emitting bodies, such as these derivatives, can be mentioned.
The organic light emitting layer is formed using an organic light emitting layer forming coating solution containing such a compound.

Examples of the material for the hole transporting material layer 91 include phthalocyanine, naphthalocyanine, porphyrin, oxadiazole, triphenylamine, triazole, imidazole, imidazolone, pyrazoline, tetrahydroimidazole, hydrazone, stilbene, butadiene, and derivatives thereof. What is normally used as a hole transport material can be used. Also, commercially available as a composition for forming a hole transport layer, for example, poly (3,4) ethylenedioxythiophene / polystyrene sulfonate (abbreviation PEDOT / PSS, manufactured by Bayer, trade name: Baytron P AI4083, marketed as an aqueous solution. Etc.) can also be used as a material for the hole transport layer.
The hole transport layer 91 is formed using a hole transport layer forming coating solution containing such a compound.

Materials for the electron transport layer 93 include anthraquinodimethane, fluorenylidenemethane, tetracyanoethylene, fluorenone, diphenoquinone oxadiazole, anthrone, thiopyran dioxide, diphenoquinone, benzoquinone, malononitrile, niditrobenzene, nitro. What is normally used as an electron transport material, such as anthraquinone, maleic anhydride or perylene tetracarboxylic acid, or a derivative thereof, can be used.
The electron transport layer 93 is formed using an electron transport layer forming coating solution containing such a compound.

The organic EL layer 85 is formed, for example, in accordance with the stacking mode illustrated in FIG. 6, the organic light emitting layer forming coating liquid, the hole transporting layer forming coating liquid, and the electron transporting layer forming coating liquid described above. Is injected into a predetermined position separated by a partition wall.
Examples of the injection means include a dispenser method of dropping using a dispenser, an ink jet method, a spin coating method, and a printing method.
In this example, the organic EL layer is preferably formed under roll-to-roll manufacturing conditions by a printing method such as gravure printing, offset / gravure printing, and inkjet printing.
In particular, the method of separately printing by the ink jet printing method is preferably applied because it can be applied without contacting the base material, so that the base material is not damaged, and a plate is not required and the degree of freedom is high.
Productivity can be further improved by forming the organic EL layer 85 by these printing methods.
Each injected coating liquid is subjected to a heat treatment such as a vacuum heat treatment according to a normal means.
The thickness of the organic EL layer 85 composed of each of the above-described lamination modes is preferably in the range of 0.1 to 2.5 μm.

Note that the partition wall (not shown) forms a region divided for each emission color on the plane of the light emitting display panel.
Depending on the configuration of the organic EL layer 85, a hole transport layer forming coating solution, an organic light emitting layer forming coating solution, an electron transport layer forming coating solution, or the like is injected into the region divided by the partition walls. .
As a partition material, various materials conventionally used as a partition material, for example, a photosensitive resin, an active energy ray curable resin, a thermosetting resin, a thermoplastic resin, and the like can be used.
As a partition formation means, it can be formed by means suitable for the partition material employed, and for example, it can be formed by using a thick film printing method or by patterning using a photosensitive resist.

(Sealing agent 90)
The sealing agent 90 is the flexible sealing material described above, and a gap is formed between the light emitting portion (also referred to as an organic EL element) 81 including the organic EL layer 85 and the flexible sealing substrate 88. Is preferably provided for the purpose of preventing the presence of odor and improving the sealing performance.
As the sealant 90, various commonly used ones can be used, but an epoxy resin-based thermosetting adhesive or an acrylic resin-based UV curable adhesive can be preferably used.

  In addition, since the sealing agent 90 has a barrier property depending on the type, one side of the light emitting portion 81 (opposite to the observer side) is provided without providing a plastic sealing base material 88 and a barrier layer 87 described later. ) May be composed only of this sealant.

Even if the sealing agent 90 is directly formed on the entire surface of the light emitting portion (organic EL element) 81, the sealing agent surface is formed on the flexible sealing substrate 88 and then the surface of the sealing agent is formed on the light emitting portion. Alternatively, it may be formed so as to be bonded onto 81.
The sealant is preferably formed as thin as possible within a range in which the gap can be filled, and the thickness and the like are appropriately adjusted.
The curing means differs depending on whether it is a thermosetting type or a UV curable type, and can be cured based on the respective curing conditions.

This sealant 90 is preferably provided on the entire surface of the light emitting portion (organic EL element) 81.
In the case of a conventional frame-like coating applied to a glass substrate, if a force such as bending the panel is applied after the sealing substrate is bonded, the vicinity of the center of the sealing substrate may come into contact with the element. However, such a problem can be suppressed by providing the sealant 90 on the entire surface.
Therefore, the organic EL display obtained by forming the sealant on the entire surface does not have voids inside, so it prevents unnecessary distortion and tension even when it is rolled or bent. Thus, problems such as abnormal contact inside the organic EL element can be suppressed.
Moreover, since the sealing agent itself has a barrier property, by providing the sealing agent over the entire surface to increase the sealing degree, it is possible to further suppress moisture permeability and air permeability and improve the protection of the element. be able to.

(Barrier layer 87)
Although this barrier layer 87 is not an essential layer in the light-emitting display panel of this example, as shown in FIG. 6, it corresponds to the flexible sealing substrate 88 (corresponding to the second support 12 in FIG. 1A). ) Side is a layer preferably provided on the side.
The barrier layer 87 is formed between the flexible sealing substrate 88 and the second electrode 86, more specifically, between the flexible sealing substrate 88 and the sealing agent 90 described above. The same effects as the barrier layer 83 described above are exhibited.
Moreover, although it does not specifically limit about the material to be used, The same thing as the above-mentioned barrier layer 83 can be used preferably.

The barrier layer 87 is formed on a flexible sealing substrate 88 described later by a physical vapor deposition method such as a reactive sputtering method or a vacuum vapor deposition method.
As a film forming apparatus for the barrier layer 87, a vapor deposition apparatus capable of physical vapor deposition while transporting a film-like flexible sealing substrate 88 described later by roll-to-roll is used.

(Flexible sealing substrate 88)
The flexible sealing substrate 88 shown in FIG. 6 corresponds to the second support 12 shown in FIG. 1A, and the second support 12 shown in FIG. Also referred to as a sealing substrate 88.
The flexible sealing substrate 88 is the above-described flexible sealing material. In the light emitting display panel of the present invention, as shown in FIG. 6, the flexible sealing substrate 88 is provided on the surface opposite to the viewer side. Is.
When the light emitting display panel of this example is observed from only one side, the flexible sealing substrate 88 is not required to be transparent, but when observed from both sides, the flexible sealing substrate 88 It is preferable that the material 88 has transparency.
By setting it as the transparent flexible sealing base material 88, an observer can visually recognize a character etc. easily also from the back side.

As the flexible sealing substrate 88, a film-shaped resin substrate is used.
A film-like resin base material is excellent in flexibility and can be rolled or bent, and thus is preferably used as a base material for a light-emitting display panel that can be mounted or installed on various objects. Since the forming material and the forming method are the same as those of the flexible base material 82 described above, they are omitted here.
Note that the thickness of the flexible sealing substrate 88 is also preferably 50 to 200 μm, like the above-described flexible substrate 82, and can give preferable flexibility to the light-emitting display panel.

(Insulating layer 89)
The insulating layer 89 illustrated in FIG. 6 corresponds to the insulating layer 30B illustrated in FIG. 1A, and the insulating layer 30B illustrated in FIG.
The insulating layer 89 is formed in a pattern having an opening corresponding to a predetermined pattern between the first electrode 84 and the second electrode 86 described above.
The formed insulating layer 89 defines a light emitting display region having a predetermined shape.
The light emitting display area constitutes a display pattern made up of characters, figures, symbols or combinations thereof, or the non-light emitting area other than the light emitting area is made up of characters, figures, symbols or combinations thereof. Configure.

That is, since the insulating layer 89 provided between the two electrodes cuts off the voltage applied between the two electrodes, even if an organic EL element is formed between the two electrodes, the light emission in that region is prevented. Acts as follows.
Therefore, the region where the insulating layer 89 is patterned is a non-light emitting region, and as a result, the light emitting region is defined.
On the other hand, in the light emitting region in which the insulating layer 89 is not formed, since both electrodes are in contact with both sides of the organic EL layer, the organic EL element to which voltage is applied from both electrodes emits light and exerts an appealing effect. Works.

The light emitting region or the non-light emitting region defined by the insulating layer 89 is preferably a display pattern composed of characters, figures, symbols, or a combination thereof.
If an insulating layer is formed so that such a display pattern is displayed, an excellent appeal effect can be given to a specific display pattern made up of characters, figures, symbols, or combinations thereof.

  In addition, a partition wall is formed with dots by a dispenser method, an ink jet method, a spin coating method, a printing method, or the like, in which a coating liquid for forming an organic EL layer, a coating liquid for forming a hole transport layer, and a coating liquid for forming an electron transport layer are dropped using a dispenser. By injecting into the predetermined position, multicolor light emission can be performed.

Such an insulating layer 89 may be laminated on the first electrode 84 side or the second electrode 86 side, and is not particularly limited.
As a resist material to be used, in the first example, a black pigment dispersed is used.
Even if patterned, there is almost no visibility, the insulating layer 89 itself does not affect the visibility of the light-emitting display panel, and as described above, the insulating layer 30B (corresponding to 89) is suppressed visually. By disposing as a layer, it is possible to suppress visual recognition due to a difference in reflectance or a color difference between one or more of the auxiliary electrode 27 and the organic EL layer 40 and their surroundings.

Hereinafter, a method for forming a display pattern using the insulating layer 89 will be described in detail.
As a material for forming the insulating layer 89, a photosensitive resin composition used as a resist material is preferably used.
The photosensitive resin composition may be a positive photosensitive resin composition or a negative photosensitive resin composition. Examples of the positive photosensitive resin composition include those having a photodegradable and soluble quinonediazide photosensitive resin as a main component.
In addition, as the negative photosensitive resin composition, for example, a photodegradable crosslinked azide photosensitive resin, a photolytic insoluble diazo photosensitive resin, a photodimerization cinnamate photosensitive resin, a photopolymerization type Examples thereof include an unsaturated polyester photosensitive resin, a photopolymerizable acrylate resin, or a cationic polymerization resin.
In these photosensitive resin compositions, a photopolymerization initiator, a sensitizing dye, and the like can be blended as necessary.

The insulating layer 89 is formed in a predetermined pattern by applying the above-described photosensitive resin composition to the entire surface of any electrode, performing pattern exposure, and developing.
Specifically, first, the photosensitive resin composition described above is formed on the entire surface of the electrode by spin coating, and the photosensitive resin composition is exposed with a mask pattern.
Exposure, ultra-high pressure mercury lamp, high pressure mercury lamp, carbon arc, a light source such as a xenon arc or metal halide lamp is used, 0.1~10,000mJ / cm ^2, preferably by ultraviolet irradiation 10~1,000mJ / cm ² Done.

When the positive photosensitive resin composition is used, the exposed portion is solubilized, so that the exposed portion is dissolved and removed by development.
And the part which is not exposed remains as an insulating layer of a predetermined pattern.
On the other hand, when the negative photosensitive resin composition is used, the exposed portion is insolubilized, so that the unexposed portion is dissolved and removed by development.
The exposed portion remains as an insulating layer having a predetermined pattern.
Although the thickness of an insulating layer is arbitrarily adjusted according to the insulation resistance intrinsic | native to resin which comprises the insulating layer, Usually, it exists in the range of 0.5-3.0 micrometers.

  The light emitting organic EL display panel of this example has been described above. However, as long as the object and effect of the present invention are not impaired, a mode in which functional layers other than the above-described layers are provided may be used. Examples of such a functional layer include a low refractive index layer, a reflective layer, a light absorption layer, and the like used in ordinary organic EL elements or light-emitting display panels.

In the light-emitting organic EL display panel of the present invention, the thickness of the base material and the thickness of the layer described above are adjusted so that the total thickness is 400 μm or less, preferably 200 μm or less, and 50 μm or more. preferable.
The light-emitting organic EL display panel having a thickness within such a range is flexible and can be rounded or bent, and can be installed in a complicated shape when viewed as an electric decoration panel.
When the thickness of the light emitting organic EL display panel exceeds 400 μm, the flexibility may be slightly inferior.
Further, if the thickness of the light emitting organic EL display panel is less than 50 μm, it is easily affected by a decrease in barrier properties and heat and stress during the process.

In the light-emitting organic EL display panel of this example, a laminated structure including at least the flexible substrate 82 and the first electrode 84 on one side of the organic EL layer 85, and at least the second electrode 86 on the other side. And the laminated structure made of the flexible sealing material 88 preferably have the same or similar expansion coefficient.
By doing so, even if an external factor such as heating is added during the manufacturing process of the light emitting display panel, adverse effects such as distortion of the light emitting display panel are less likely to appear.
Here, the laminated structure on one side of the organic EL layer 85 and the laminated structure on the other side are added during the manufacturing process by making the number of layers, the material, the thickness, and the like the same or substantially the same. Even if an external factor is added, since the distortion generated on both sides is balanced, adverse effects such as distortion of the obtained light-emitting display panel can be reduced.

Further, in the manufacturing process of the light emitting organic EL display panel, since each layer is formed by a wet method, continuous manufacturing becomes possible, and thus a light emitting display panel that can be supplied to the market at a price setting that is easily accepted by the market can be provided.
For example, the flexible base material 2 and the flexible sealing base material 88 on which the barrier layers 83 and 87 are formed by the continuous vapor deposition method are prepared in advance, and the flexible base material 82 has the first layer on the barrier layer 83 side. One electrode 84 is formed by a sputtering method, an organic EL layer 85 is formed on the first electrode 84 by a printing method, a second electrode 86 is formed on the organic EL layer 85 by a vacuum deposition method, and the second A sealing agent 90 is applied and formed on the electrode 86, and a flexible sealing substrate 88 including a barrier layer 87 is provided on the sealing agent 90.
By adopting such a wet method in many processes, a light emitting display panel can be manufactured by a roll-to-roll continuous manufacturing method with excellent productivity.

Next, the second to fourth examples of the embodiment of the light emitting organic EL display panel of the present invention are respectively based on FIG. 1 (b), FIG. 2 (a), and FIG. 2 (b). explain.
The light-emitting organic EL display panel of the second example shown in FIG. 1B is the same as that of the light-emitting organic EL display panel of the first example. The circularly polarizing plate 75 is pasted so as to cover the entire surface of the part. By adopting such a form, it is unnecessary in the display area other than the area covered by the visual suppression layer (insulating layer 30B). This is effective for blurring the edge perception, which is a natural visual perception.
As the polarizing plate 75, a commercially available circular polarizing plate is usually used.
Other parts are the same as those in the first example, and a description thereof is omitted here.
The light-emitting organic EL display panel of the third example shown in FIG. 2A is the same as the light-emitting organic EL display panel of the second example. A substrate having a transflective layer 76 disposed on one surface thereof is provided with the transflective layer 76 side as the inner side (polarizing plate 75 side), and a light-transmitting pattern layer 77 is provided on the outer side. It is a thing.
By doing so, the pattern layer is not affected by the color of the lower layer (second support side) than the pattern layer, and the pattern layer is not affected by the color of the lower layer (second support side). And the problem that the edge of the opening of the light shielding layer is noticeable can be solved.
As the fourth support, the same one as the first support is used.
Here, as the picture layer 76, a film base material coated with a picture layer is used, but it may be formed by direct coating.
Here, a transparent protective layer is disposed on the pattern layer.
The paint for the pattern layer is preferably a transparent colored ink.
As the transflective layer 76, a metal oxynitride film or an inorganic film can be applied.
Usually, the oxynitride film is formed by sputtering, vapor deposition, or the like, and the inorganic film is formed by sputtering, vacuum vapor deposition, CVD, sol-gel, or polymer and dispersed by printing or photolithography.
The total light transmittance of this transflective layer is represented by the total light transmittance T (%) defined in JIS K7136, and is 20% to 80%, preferably 30% to 70%, more preferably 40%. The range of ˜60% has good visibility at the time of organic EL emission while achieving the effect of suppressing the visibility of the lower layer.
The light emitting organic EL display panel of the fourth example shown in FIG. 2B is the same as the light emitting organic EL display panel of the third example shown in FIG. Instead of the structure provided on the support 14, a semi-transmissive / semi-reflective layer 76 is provided on the outer surface of the circularly polarizing plate 75.
Similar to the third example, the visibility is good.
Other parts are the same as those in the first example, and a description thereof is omitted here.

Next, the example of the 5th example of embodiment of the light emission type organic electroluminescence display panel of this invention is demonstrated based on Fig.3 (a).
The light emitting organic EL display panel of the fifth example includes a transparent first support 11, a first electrode 20, an organic EL layer 40, a second electrode 25B, and a second support 12 stacked in this order. In addition, a partitioned insulating layer 30B is formed between the first electrode 20 and the second electrode 25 so as to open the light-emitting region and cover the non-light-emitting region. A light-emitting organic EL display panel whose side is a light emission extraction side (also referred to as an observer side). In particular, the second electrode 25B is formed of a black material having a low light reflectance, and other than the light emitting region 60. In the non-light emitting area, a light shielding layer 70B made of a black material having a low light reflectance is disposed as a visual suppression layer.
As in the first example, the second electrode 25B is made of a black material having a low light reflectance, thereby effectively suppressing the second electrode from being visually recognized by the reflected light. In addition, by arranging the light shielding layer 70B made of a black material having a low light reflectance as a visual suppression layer, a difference in reflectance between one or more of the auxiliary electrode 27 and the organic EL layer 40 and their surroundings It is possible to suppress visual recognition due to a difference in hue.
A light-emitting organic EL display panel of a fifth example is the same as the conventional light-emitting organic EL display panel shown in FIG. A light shielding layer 70B made of a black material having a low rate is provided.
Examples of the black material having a low light reflectance for forming the light shielding layer 70B include black ink containing a black pigment or dye.
As the insulating layer 30, here, a photosensitive resist not containing a black pigment in the insulating layer 30B of the first example is applied.
Examples of the black material for forming the second electrode 25B include ruthenium oxide, and examples of the black material for forming the insulating layer 30B include a black pigment-containing resist.
Other parts are the same as those in the first example, and a description thereof is omitted here.

Next, the sixth to tenth embodiments of the light-emitting organic EL display panel according to the present invention are shown in FIGS. 3 (b), 4 (a), 4 (b), and 5 respectively. This will be described with reference to (a) and FIG.
The light emitting organic EL display panel of the sixth example shown in FIG. 3B is the same as the light emitting organic EL display panel of the fifth example shown in FIG. The polarizing plate 75 is bonded to the outside of the layer (visibility suppressing layer) 70B so as to cover the entire surface of the light emitting portion and the non-light emitting portion. By adopting such a form, the visibility suppressing layer (light shielding layer) 70B), which is effective for blurring the edge visual recognition, which is unnecessary visual recognition in the display area other than the area covered by (70B).
As the polarizing plate 75, a commercially available circular polarizing plate is usually used.
The other parts are the same as in the fifth example, and will not be described here.
The light-emitting organic EL display panel of the seventh example shown in FIG. 4A is the same as the light-emitting organic EL display panel of the fifth example shown in FIG. And provided on the inner surface of the transparent third support 13.
As the third support, the same one as the first support is used.
As in the fifth example, the second electrode is effectively suppressed from being visually recognized by reflected light, and a light-shielding layer 70B made of a black material having a low light reflectance is provided as a visual suppression layer in the non-light emitting region. Accordingly, it is possible to suppress visual recognition due to a difference in reflectance and a difference in color between one or more of the auxiliary electrode 27 and the organic EL layer 40 and their surroundings.
The other parts are the same as in the fifth example, and will not be described here.
The light-emitting organic EL display panel of the eighth example shown in FIG. 4B is the same as the light-emitting organic EL display panel of the seventh example shown in FIG. In addition, the polarizing plate 75 is bonded so as to cover the entire surface of the light emitting part and the non-light emitting part. By adopting such a form, the region covered with the visual suppression layer (the insulating layer 30B) This is effective in blurring the edge visual recognition, which is unnecessary visual recognition in the display area other than.
The same parts are used for each part, and the description is omitted.
The light emitting organic EL display panel of the ninth example shown in FIG. 5A is the same as the light emitting organic EL display panel of the eighth example shown in FIG. A base material having a semi-transmissive semi-reflective layer 76 disposed on one surface of the fourth support 14 is provided with the semi-transmissive / semi-reflective layer 76 side as the inner side (polarizing plate 75 side), and further, the outer side is light transmissive. 77 is provided with the pattern layer.
By doing so, the pattern layer is not affected by the color of the lower layer (second support side) than the pattern layer, and the pattern layer is not affected by the color of the lower layer (second support side). And the problem that the edge of the opening of the light shielding layer is noticeable can be solved.
The same parts are used for each part, and the description is omitted.
The light emitting organic EL display panel of the tenth example shown in FIG. 5B is the same as the light emitting organic EL display panel of the ninth example shown in FIG. Instead of the structure provided on the support 14, a semi-transmissive / semi-reflective layer 76 is provided on the outer surface of the circularly polarizing plate 75.
Similar to the ninth example, the visibility is good.
The same parts are used for each part, and the description is omitted.

Each said form is an example and is not limited to this.
Even if other functional layers are added to the first to tenth examples, the present invention is not limited to these as long as the same effect can be obtained.
In addition, for example, a form in which the surface of the light shielding layer in the fifth example to the tenth example disposed on the first support body 11 or the third support body 13 is on the opposite side is also included.
The present invention is also applicable to POP (Point Of Purchase advertising) in the case of passive matrix type and active matrix type.
Of course, the present invention can also be applied to a light emitting organic EL display panel provided with a color filter layer and a light emitting organic EL display panel provided with a color conversion phosphor layer between the color filter layer and the transparent electrode.

FIG. 1A is a schematic cross-sectional view of a first example of an embodiment of a light-emitting organic EL display panel of the present invention, and FIG. 1B is a diagram of an embodiment of the light-emitting organic EL display panel of the present invention. It is a schematic sectional drawing of the 2nd example. FIG. 2A is a schematic sectional view of a third example of the embodiment of the light-emitting organic EL display panel of the present invention, and FIG. 2B is a diagram of the embodiment of the light-emitting organic EL display panel of the present invention. It is a schematic sectional drawing of the 4th example. FIG. 3A is a schematic cross-sectional view of a fifth example of the embodiment of the light-emitting organic EL display panel of the present invention, and FIG. 3B is a diagram of the embodiment of the light-emitting organic EL display panel of the present invention. It is a schematic sectional drawing of a 6th example. 4A is a schematic cross-sectional view of a seventh example of the embodiment of the light-emitting organic EL display panel of the present invention, and FIG. 4B is a diagram of the embodiment of the light-emitting organic EL display panel of the present invention. It is a schematic sectional drawing of an 8th example. FIG. 5A is a schematic cross-sectional view of a ninth example of the embodiment of the light-emitting organic EL display panel according to the present invention, and FIG. 5B shows the light-emitting organic EL display panel according to the embodiment of the present invention. It is a schematic sectional drawing of a 10th example. FIG. 6A is a cross-sectional view schematically showing a stacked structure of the organic EL device body of the light-emitting organic EL display panel of the first example shown in FIG. 1A, and FIG. It is an expanded sectional view of the light emission part which showed the patterning of the layer clearly. FIG. 7A to FIG. 7D are cross-sectional views schematically showing another laminated structure of the organic EL device body. It is a schematic sectional drawing of one example of the conventional area light emission type organic electroluminescence display panel.

Explanation of symbols

11 1st support body 12 2nd support body 13 3rd support body 14 4th support body 20 1st electrode (here anode)
25 Second electrode (here, cathode)
25B Second electrode 27 (made of black material) Auxiliary electrode 30 Insulating layer 30B Insulating layer 40 (made of black material) Insulating layer 40 Organic EL layer 50 Sealing material 60 Light emitting region 65 Overlapping region 70 of second electrode and organic EL layer 70 Light shielding layer (Also called visual suppression layer)
70B Light shielding layer 75 (made of black material) Polarizing plate (also called circularly polarizing plate)
76 Transflective layer (semi-transmissive layer)
77 Pattern layer 80 Organic EL display device body (also called display panel body)
81 Light emitting unit 82 Flexible base material (also referred to as a first support here)
83 Barrier layer 84 1st electrode (here anode)
85 Organic EL layer 85a Organic phosphor layer 86 Second electrode (cathode here)
87 Barrier layer 88 Flexible sealing substrate (also referred to as second support here)
89 Insulating layer (also referred to as insulating layer, here photoresist)
89A Opening 90 Sealant 91 Hole Transport Layer 92 Organic Light Emitter Layer 93 Electron Transport Layer 94 Organic Light Emitter Layer / Hole Transport Layer 95 Electron Transport Layer / Organic Light Emitter Layer

Claims (17)

  At least a transparent first support, first electrode, organic EL layer, second electrode, and second support are laminated in this order, and between the first electrode and the second electrode. A light-emitting organic EL display panel in which a light-emitting region is opened, a partitioned insulating layer is formed so as to cover a non-light-emitting region, and a first support side is a light emission extraction side (also referred to as an observer side). Then, in order to suppress unnecessary visual recognition due to the difference in reflectance and hue of each part, the second electrode is formed of a black material having a low light reflectance, and the light reflectance is reduced in the non-light emitting region. A light-emitting organic EL display panel comprising a visual suppression layer made of a low black material.   2. The light-emitting organic EL display panel according to claim 1, wherein the visual suppression layer includes the insulating layer made of a black material.   3. The light emitting organic EL display panel according to claim 2, wherein the black material is made of a black pigment resist.   The light-emitting organic EL display panel according to claim 1, wherein the visual suppression layer shields a non-light-emitting region and a region where any of the organic EL layer and the second electrode is not stacked. A light-shielding layer made of a black material having a low reflectance and disposed on the light emission extraction side from the first electrode, on one surface of the first support, or on one surface of the third support. A light-emitting organic EL display panel.   5. The light emitting organic EL display panel according to claim 4, wherein the black material of the light shielding layer is made of black ink.   6. The light-emitting organic EL display panel according to claim 1, wherein the entire surface of the light emitting unit and the non-light emitting unit is provided outside the first support, the visual suppression layer, and the third support. A light-emitting organic EL display panel, characterized in that a polarizing plate is bonded so as to cover.   The light-emitting organic EL display panel according to claim 6, further comprising a transflective layer disposed outside the polarizing plate, and a light transmissive property disposed outside the transflective layer. A light-emitting organic EL display panel characterized in that a pattern layer is provided.   The light-emitting organic EL display panel according to claim 8, wherein the transflective layer is disposed on one surface side of the fourth support.   10. The light-emitting organic EL display panel according to claim 9, wherein a total light transmittance of the transflective layer is expressed by a total light transmittance T (%) defined in JIS K7136, and is 20% to A light-emitting organic EL display panel characterized by being in a range of 80%.   10. The light-emitting organic EL display panel according to claim 7, wherein a transparent protective layer is disposed on the pattern layer. 11.   The light-emitting organic EL display panel according to any one of claims 7 to 11, wherein the pattern layer is directly applied or formed, or another transparent support coated with the pattern layer is pasted. A light-emitting organic EL display panel, which is arranged.   The light-emitting organic EL display panel according to any one of claims 1 to 11, wherein the first support, the second support, the third support, and the transparent support coated with a picture layer are provided. An area light emitting organic EL display panel characterized in that the body is a flexible plastic substrate.   The light-emitting organic EL display panel according to any one of claims 1 to 12, wherein the light-emitting organic EL display panel is a passive matrix type.   14. The light-emitting organic EL display panel according to claim 1, wherein the light-emitting organic EL display panel is an active matrix type.   The light-emitting organic EL display panel according to any one of claims 1 to 14, wherein the light-emitting organic EL display panel is an organic light-emitting poster.   The light-emitting organic EL display panel according to any one of claims 1 to 15, further comprising a color filter layer.   17. The light-emitting organic EL display panel according to claim 16, further comprising a color conversion phosphor layer between the color filter layer and the transparent electrode.

Images