JP2011054488A - Organic electroluminescent display device and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic electroluminescent display device emitting light with uniform luminance between a pixel having low luminance efficiency and a pixel having high luminance efficiency, and high definition, and overcoming non-uniformity of a drive power and element life between organic electroluminescent elements corresponding to those pixels, and a method for manufacturing the same. <P>SOLUTION: The organic electroluminescent display device includes: rectangular pixel regions of three colors respectively corresponding to red, green and blue and formed by organic electroluminescent elements including at least a luminescent layer; and a hemispherical lens provided on a luminance surface of another rectangular pixel region having a lower luminance than that of one of the three-color rectangular pixel regions, and having a lens diameter equal to or greater than twice the length of the short side of the another rectangular pixel region and equal to or less than four times that length. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an organic electroluminescent device in which a lens is disposed on a pixel and a method for manufacturing the same.

  An organic electroluminescent display device (organic EL display device) is a self-luminous display device, and is used for displays and illumination. Organic electroluminescent displays have advantages in display performance such as higher visibility than conventional CRTs and LCDs and no viewing angle dependency. There is also an advantage that the display can be reduced in weight and thickness. In addition to the advantages of light weight and thin layers, organic EL lighting has the possibility of realizing illumination in a shape that could not be realized so far by using a flexible substrate.

In recent years, organic electroluminescent display devices each having organic electroluminescent elements that emit red, green, and blue light have been studied.
However, there are variations in the luminous efficiency of the organic electroluminescent elements of the respective colors, and the luminous efficiency of organic electroluminescent elements that generally exhibit red and blue color development tends to be inferior to the luminous efficiency of organic electroluminescent elements that exhibit green color development. It is in.
In the organic light emitting display device having such a variation in luminous efficiency, when uniform light emission is performed, the driving power of the organic electroluminescent element having poor luminous efficiency is increased, and the power consumption between the organic electroluminescent elements is unbalanced. There is a problem. Further, when the driving power of an organic electroluminescent element having inferior luminous efficiency is increased, there is a problem that only the organic electroluminescent element shortens the device life.

By the way, various proposals have been made as proposals for improving the light emission efficiency. For example, a microlens group composed of at least two substantially hemispherical microlenses having different sizes is formed on the light extraction surface. Thus, an organic EL element that reduces the probability of total reflection at the light extraction surface / air interface and improves the light emission efficiency has been proposed (see Patent Document 1).
A lens layer having at least one microlens formed at a position within at least one side of the light emitting element on the electrode in the emission direction in which light from the light emitting element is output; An organic EL element that avoids crosstalk with adjacent pixels and improves luminous efficiency has been proposed (see Patent Document 2).
However, when these lenses are used for all organic electroluminescent devices of red, green, and blue in organic electroluminescent display devices each having an organic electroluminescent device having a light emitting layer that emits red, green, and blue light, The distance between them becomes long, and there is a problem that high-definition light-emitting display cannot be performed.

Japanese Patent Laid-Open No. 2004-47298 JP 2004-227940 A

  An object of the present invention is to solve the conventional problems and achieve the following objects. That is, the present invention can emit light with high brightness and uniform brightness between a pixel with low luminous efficiency and a pixel with high luminous efficiency, and driving power and power between organic electroluminescent elements corresponding to these pixels. An object of the present invention is to provide an organic light emitting display device which eliminates non-uniformity of element lifetime and a method for manufacturing the same.

Means for solving the problems are as follows. That is,
<1> A rectangular pixel region of three colors corresponding to each of red, green, and blue formed by an organic electroluminescence element including at least a light emitting layer, and one rectangular pixel region among the rectangular pixel regions of the three colors. On the light emitting surface of another rectangular pixel region having a luminance lower than the luminance in the shape pixel region, the lens diameter is 2 to 4 times the length of the short side in the other rectangular pixel region. An organic electroluminescent display device comprising a hemispherical lens.
<2> Of the three-color rectangular pixel regions, on the light emitting surface corresponding to the rectangular pixel region having the highest luminance, the length of the short side of the rectangular pixel region is at least one time, and The organic electroluminescence display device according to <1>, further including a hemispherical lens having a lens diameter smaller than a lens diameter on a light emitting surface of another rectangular pixel region having luminance lower than that in the rectangular pixel region. It is.
<3> The other rectangular pixel region having a luminance lower than that of the one rectangular pixel region is a rectangular pixel region corresponding to each of red and blue, and the one rectangular pixel region is green. The organic electroluminescence display device according to any one of <1> to <2>, which is a corresponding rectangular pixel region.
<4> The organic electroluminescent element has an optical resonator structure that selectively takes out light of an arbitrary wavelength from the light emitting surface side by disposing a light emitting layer between the reflective electrode and the transflective electrode. <1><3> The organic electroluminescence display device according to any one of <3>.
<5> The organic electroluminescence display device according to any one of <1> to <4>, wherein the light emitting layer contains at least one phosphorescent material.
<6> A three-color rectangular pixel region corresponding to each of red, green, and blue formed by an organic electroluminescent element including at least a light-emitting layer, and one of the three-color rectangular pixel regions. On the light emitting surface of another rectangular pixel region having a luminance lower than the luminance in the shape pixel region, the lens diameter is 2 to 4 times the length of the short side in the other rectangular pixel region. And a hemispherical lens, wherein the hemispherical lens is disposed at least on a light emitting surface of the other rectangular pixel region. It is a manufacturing method of a display device.
<7> The method for producing an organic electroluminescence display device according to <6>, wherein the hemispherical lens is formed by an imprint method using a photocurable resin and a thermoplastic resin.

  According to the present invention, the conventional problems can be solved, the object can be achieved, and light emission can be performed with high brightness at a uniform luminance between pixels with low luminous efficiency and pixels with high luminous efficiency. It is possible to provide an organic light emitting display device and a method for manufacturing the same that can eliminate the non-uniformity of driving power and device life between organic light emitting devices corresponding to these pixels.

FIG. 1 is a plan view for conceptually explaining one configuration example of an organic light emitting display device according to the present invention. FIG. 2 is a plan view conceptually illustrating another configuration example of the organic light emitting display device according to the present invention. FIG. 3A is a plan view conceptually illustrating still another configuration example of the organic light emitting display according to the present invention. FIG. 3B is a plan view for conceptually explaining still another configuration example of the organic light emitting display according to the present invention. FIG. 4 is a schematic cross-sectional view showing a bottom emission type organic electroluminescent device which is an example of the organic electroluminescent device of the present invention. FIG. 5 is a schematic cross-sectional view showing a top emission type organic electroluminescent device which is an example of the organic electroluminescent device of the present invention.

(Organic light emitting display)
The organic light emitting display device of the present invention has a rectangular pixel region and a hemispherical lens (A).
The rectangular pixel region is a three-color rectangular pixel region corresponding to each of red, green, and blue formed by an organic electroluminescent element including at least a light emitting layer.
In addition, the hemispherical lens (A) is formed on the light emitting surface of another rectangular pixel region having a luminance lower than that of one rectangular pixel region out of the three color rectangular pixel regions. The lens diameter is 2 to 4 times the length of the short side in the rectangular pixel region.

<Rectangular pixel area>
The rectangular pixel region is not particularly limited and is not particularly limited as long as it includes the organic electroluminescent element. For example, the rectangular pixel region is disposed at least on the organic electroluminescent element and the organic electroluminescent element. And an organic electroluminescent display unit including an optical functional layer having a rectangular opening for extracting light emitted from the organic electroluminescent element.

There is no restriction | limiting in particular as a magnitude | size in the light emission surface of the said rectangular pixel area | region, Although it can select suitably according to the objective, As a short side, 1 micrometer-10,000 micrometers are preferable, and 5 micrometers-500 micrometers are more preferable. 10 μm to 100 μm is particularly preferable. The long side is preferably 1 μm to 100,000 μm, more preferably 5 μm to 5,000 μm, and particularly preferably 10 μm to 300 μm.
When the size is preferable, the display performance can be improved as a display.

<Hemispherical lens>
The hemispherical lens (A) has a function of improving the front luminance of light extracted from the rectangular pixel region.
The hemispherical lens (A) is not particularly limited as long as it has the above function, and can be appropriately selected according to the purpose, and includes a known hemispherical lens.

The hemispherical lens (A) is arranged on the light emitting surface of another rectangular pixel region having a luminance lower than the luminance in one rectangular pixel region out of the three color rectangular pixel regions. If there is, there is no restriction | limiting in particular, According to the objective, it can select suitably.
The number of hemispherical lenses is not particularly limited, and a plurality of hemispherical lenses may be arranged for one rectangular pixel region.

The lens diameter (A) of the hemispherical lens is not particularly limited as long as it is 2 to 4 times the length of the short side in the other rectangular pixel region, but it is 2 to 3 times. The following are preferable, and 2.5 times or more and 3 times or less are more preferable.
When the lens diameter is provided, the arrangement of the lenses is easy and the light extraction efficiency of the entire display can be expected to be improved.
Further, when a plurality of hemispherical lenses are arranged on the light emitting surface of the rectangular pixel region, the lens diameters of the respective hemispherical lenses (A) are different lens diameters even if they are the same lens diameter. May be.
Further, it is sufficient that at least one of the plurality of hemispherical lenses (A) has the lens diameter, and it is not necessary that all hemispherical lenses have the lens diameter. It is preferable to satisfy the diameter.

Of the three color rectangular pixel regions, a rectangular pixel region having higher luminance than the other rectangular pixel regions does not necessarily require a hemispherical lens, but from the viewpoint of obtaining high luminance. The hemispherical lens (B) is preferably arranged also in a rectangular pixel region having higher luminance than the other rectangular pixel regions.
In this case, as the lens diameter of the hemispherical lens (B) disposed on the light emitting surface of the rectangular pixel region having higher luminance than the other rectangular pixel regions, among the rectangular pixel regions of the three colors, There is no particular limitation as long as it is smaller than the lens diameter of the hemispherical lens arranged on the light emitting surface of the other rectangular pixel region having a luminance lower than that of the one rectangular pixel region, and is appropriately selected according to the purpose. However, the lens diameter of the hemispherical lens (B) arranged on the light emitting surface corresponding to the rectangular pixel region having the highest luminance among the rectangular pixel regions of the three colors may be the rectangular shape. It is preferably smaller than the lens diameter on the light emitting surface of another rectangular pixel region that is at least 1 time the length of the short side in the pixel region and has a luminance lower than that in the rectangular pixel region. Further, the rectangular pixel area 3 times 1 times the length of a short side in the following are more preferred.
With such a lens diameter, the light extraction efficiency can be improved even in a rectangular pixel region with high luminance.

The number of hemispherical lenses (B) arranged on the light emitting surface of the rectangular pixel region having a luminance higher than that in these other rectangular pixel regions is not particularly limited, and one rectangular pixel region is not limited. On the other hand, a plurality of the hemispherical lenses (B) may be arranged.
Further, when a plurality of hemispherical lenses are arranged on the light emitting surface of the rectangular pixel region, the lens diameters of the respective hemispherical lenses (B) are different lens diameters even if they are the same lens diameter. May be.

The correspondence relationship between the specific color scheme and the rectangular pixel area in the rectangular pixel areas of the three colors is not particularly limited, but other rectangular shapes having luminance lower than the luminance in one rectangular pixel area. Preferably, the pixel area is a rectangular pixel area corresponding to each of red and blue, and the one rectangular pixel area is a rectangular pixel area corresponding to green.
In general, the luminous efficiency of organic electroluminescent elements exhibiting red and blue colors tends to be inferior to the luminous efficiency of organic electroluminescent elements exhibiting green colors, improving the luminance in the rectangular pixel region corresponding to the red and blue colors. By doing so, it is possible to equalize the luminance in the rectangular pixel region corresponding to the green color, and to eliminate the non-uniformity of the driving power and the element lifetime between the elements.

When there are a plurality of the hemispherical lenses (A) and (B) arranged on the light emitting surface of the rectangular pixel region of each color, there is no particular limitation, but a plurality of hemispherical lenses on one sheet-like member It is preferable to use a light extraction member having
Such a light extraction member can be formed by an imprint method, an inkjet method, or the like.

  Hereinafter, although the organic electroluminescent display apparatus of this invention is demonstrated based on specific embodiment, the thought of this invention is not limited to the following embodiment.

-First embodiment-
A first embodiment of the organic light emitting display device of the present invention will be described with reference to FIG. FIG. 1 is a plan view for conceptually explaining one configuration example of an organic light emitting display device according to the present invention.
The organic electroluminescent display device 1 has a red rectangular pixel region 3R, a green rectangular pixel region 3G, and a blue rectangular pixel region 3B in the area where the optical function layer 2 is opened. The luminance in the red rectangular pixel region 3R and the blue rectangular pixel region 3B is lower than the luminance in the green rectangular pixel region 3G.
A hemispherical lens (large) 4 having a large diameter is disposed on each light emitting surface of the red rectangular pixel region 3R and the blue rectangular pixel region 3B.
A hemispherical lens (small) 5 having a small diameter is disposed on the light emitting surface of the green rectangular pixel region 5.

In the organic electroluminescent display device 1 having such a configuration, a hemispherical shape is formed on the light emitting surfaces of the red rectangular pixel region 3R and the blue rectangular pixel region 3B which have lower luminance than the luminance in the green rectangular pixel region 3G. Since the lens (large) 4 is arranged, the luminance in the red rectangular pixel region 3R and the blue rectangular pixel region 3B is supplemented by the hemispherical lens (large) 4, and the green rectangular pixel region 3G and the hemispherical lens ( (Small) A luminance equivalent to the front luminance in 5 is obtained.
In addition, the rectangular pixel region in which the hemispherical lens (large) 4 is arranged is a red rectangular pixel region 3R and a blue rectangular pixel region 3B with low luminance, and a hemispherical lens (on the light emitting surface of the green rectangular pixel region 3G). 4) Since 4 is not arranged, the distance between the pixels in the short side direction of the red rectangular pixel region 3R, the green rectangular pixel region 3G, and the blue rectangular pixel region 3B can be suppressed to be short, and each color can be high-definition. It is possible to emit light.
Further, since the hemispherical lens (small) 5 is arranged on the light emitting surface of the green rectangular pixel region 3G, the front luminance is higher than the front luminance in the state where the hemispherical lens (small) 5 is not arranged. Brightness is obtained.
Therefore, according to the organic electroluminescent display element 1, it is possible to emit light with high brightness and uniform brightness between the red and blue pixels having low luminous efficiency and the green pixel having high luminous efficiency. The non-uniformity of driving power and device life between corresponding organic electroluminescent devices is eliminated.

-Second Embodiment-
A second embodiment of the organic light emitting display device of the present invention will be described with reference to FIG. FIG. 2 is a plan view conceptually illustrating another configuration example of the organic light emitting display device according to the present invention.
In the organic light emitting display device 10, in each of the red rectangular pixel region 3R and the blue rectangular pixel region 3B, the hemispherical lens (large) 4 is connected on the light emitting surface of the adjacent rectangular pixel region of the same color. Formed as follows.
Further, in the green rectangular pixel region 3G, the hemispherical lens (small) 5 is connected on the light emitting surface of the adjacent rectangular pixel region of the same color.
In such an organic light emitting display device 10, if rectangular pixel regions of the same color are adjacent to each other in the long side direction, it is necessary to perform arrangement setting of hemispherical lenses according to the gaps between the rectangular pixel regions of the same color. The manufacturing efficiency can be improved.
Since other than the above is the same as the organic light emitting display device 1 in the first embodiment, the description thereof is omitted.

-Third embodiment-
A third embodiment of the organic light emitting display device of the present invention will be described with reference to FIG. 3A. FIG. 3A is a plan view conceptually illustrating still another configuration example of the organic light emitting display device according to the third embodiment.
In the organic light emitting display device 20, the hemispherical lens (large) 4 and the hemispherical lens (small) are alternately arranged in each of the red rectangular pixel region 3 </ b> R and the blue rectangular pixel region 3 </ b> B. Is done.
In such an organic electroluminescent display device 20, it is possible to achieve both easy arrangement of the hemispherical lens and adjustment of light extraction efficiency.
Since other than the above is the same as the organic electroluminescent element 10 in the second embodiment, the description thereof is omitted.

-Third embodiment-
Based on FIG. 3B, the 3-2nd embodiment of the organic electroluminescent display apparatus of this invention is demonstrated. FIG. 3B is a plan view conceptually illustrating another configuration example of the organic light emitting display according to the present invention.
In the organic light emitting display device 25, in the blue rectangular pixel region 3B, the hemispherical lens (large) 4 is formed to be connected on the light emitting surface of the adjacent rectangular pixel region of the same color.
Further, in each of the red rectangular pixel region 3R and the green rectangular pixel region 3G, the hemispherical lens (small) 5 is formed to be connected on the light emitting surface of the adjacent rectangular pixel region of the same color.
In such an organic light emitting display device 25, power consumption can be reduced even when the organic light emitting display device 25 is installed in at least one of the other rectangular pixel regions having a luminance lower than that of the one rectangular pixel region in the plane. it can.
Since other than the above is the same as the organic electroluminescent device 10 in the second embodiment, the description thereof is omitted.

<< Organic electroluminescence display section >>
As said organic electroluminescent display part (organic electroluminescent element), it contains the said organic electroluminescent element or the said organic electroluminescent element, and the said optical function layer, and has another member as needed.

-Organic electroluminescence device-
It has at least a light emitting layer between an anode and a cathode, and may have a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, etc., if necessary. It may have a function. Various materials can be used for forming each layer.
The organic electroluminescence display unit is configured as a pixel including any one of red (R), green (B), and blue (B).

--- Anode--
The anode supplies holes to a hole injection layer, a hole transport layer, a light emitting layer, and the like, and a metal, an alloy, a metal oxide, an electrically conductive compound, or a mixture thereof can be used. The material preferably has a work function of 4 eV or more. Specific examples include conductive metal oxides such as tin oxide, zinc oxide, indium oxide, and indium tin oxide (ITO), or metals such as gold, silver, chromium, and nickel, and these metals and conductive metal oxides. Inorganic conductive materials such as copper iodide and copper sulfide, organic conductive materials such as polyaniline, polythiophene, and polypyrrole, and laminates of these with ITO, preferably conductive metals It is an oxide, and ITO is particularly preferable from the viewpoint of productivity, high conductivity, transparency, and the like.
There is no restriction | limiting in particular in the thickness of the said anode, Although it can select suitably by material, 10 nm-5 micrometers are preferable, 50 nm-1 micrometer are more preferable, 100 nm-500 nm are still more preferable.

As the anode, a layer formed on a soda-lime glass, non-alkali glass, a transparent resin substrate or the like is usually used. When glass is used, it is preferable to use non-alkali glass as the material in order to reduce ions eluted from the glass. Moreover, when using soda-lime glass, it is preferable to use what gave barrier coatings, such as a silica.
The thickness of the substrate is not particularly limited as long as it is sufficient to maintain mechanical strength, but when glass is used, it is preferably 0.2 mm or more, and more preferably 0.7 mm or more.

  A barrier film can also be used as the transparent resin substrate. The barrier film is a film in which a gas impermeable barrier layer is provided on a plastic support. As the barrier film, a film in which silicon oxide or aluminum oxide is vapor-deposited (Japanese Patent Publication No. 53-12953, Japanese Patent Laid-Open No. 58-217344), an organic-inorganic hybrid coating layer (Japanese Patent Laid-Open No. 2000-323273, JP-A-2004-25732), those having an inorganic layered compound (JP-A-2001-205743), laminates of inorganic materials (JP-A-2003-206361, JP-A-2006-263389), organic Layer and inorganic layer laminated alternately (Japanese Patent Laid-Open No. 2007-30387, US Pat. No. 6,436,645, Affinito et al., Thin Solid Films 1996, pages 290-291), organic layer and inorganic layer continuously A laminate (US Patent Application Publication No. 2004-46497) and the like can be mentioned.

  Various methods are used for the production of the anode. For example, in the case of ITO, electron beam method, sputtering method, resistance heating vapor deposition method, chemical reaction method (sol-gel method, etc.), dispersion of indium tin oxide A film is formed by a method such as application of an object. The anode can be subjected to cleaning or other processing to lower the driving voltage of the display device or to increase the light emission efficiency. For example, in the case of ITO, UV-ozone treatment is effective.

--- Cathode--
The cathode supplies electrons to an electron injection layer, an electron transport layer, a light emitting layer, and the like. Adhesion between the cathode and adjacent layers such as an electron injection layer, an electron transport layer, and a light emitting layer, ionization potential, and stability It is selected in consideration of sex and the like.
As the material of the cathode, a metal, an alloy, a metal oxide, an electrically conductive compound, or a mixture thereof can be used. Specific examples thereof include alkali metals (for example, Li, Na, K, etc.) or fluorides thereof, Alkaline earth metals (eg Mg, Ca, etc.) or fluorides thereof, gold, silver, lead, aluminum, sodium-potassium alloys or mixed metals thereof, lithium-aluminum alloys or mixed metals thereof, magnesium-silver alloys or those thereof And a rare earth metal such as indium and ytterbium. Among these, a material having a work function of 4 eV or less is preferable, and aluminum, a lithium-aluminum alloy or a mixed metal thereof, a magnesium-silver alloy or a mixed metal thereof is particularly preferable.

There is no restriction | limiting in particular in the thickness of the said cathode, Although it can select suitably by material, 10 nm-5 micrometers are preferable, 50 nm-1 micrometer are more preferable, 100 nm-1 micrometer are still more preferable.
For the production of the cathode, for example, an electron beam method, a sputtering method, a resistance heating vapor deposition method, a coating method or the like is used, and a metal can be vapor-deposited alone or two or more components can be vapor-deposited simultaneously. Furthermore, a plurality of metals can be vapor-deposited simultaneously to form an alloy electrode, or a pre-adjusted alloy may be vapor-deposited.
The sheet resistance of the anode and cathode is preferably low, and is preferably several hundred Ω / □ or less.

--- Light emitting layer--
The material of the light emitting layer is not particularly limited and may be appropriately selected depending on the purpose. Holes can be injected from the anode, the hole injection layer, or the hole transport layer when an electric field is applied, and the cathode Alternatively, a layer having the function of injecting electrons from the electron injection layer, the electron transport layer, the function of moving the injected charge, and the function of emitting light by providing a field for recombination of holes and electrons is formed. What can be used can be used.

The material for the light-emitting layer is not particularly limited and may be appropriately selected depending on the purpose. For example, the organic light-emitting layer may be composed only of a light-emitting material. A mixed layer may be used.
The light emitting material is not particularly limited, and may be a fluorescent material or a phosphorescent material, or two or more kinds, but preferably contains at least one phosphorescent material.

There is no limitation in particular as said phosphorescent material, According to the objective, it can select suitably, The complex containing a transition metal atom or a lanthanoid atom can be mentioned.
The transition metal atom is not particularly limited and may be appropriately selected depending on the intended purpose. Ruthenium, rhodium, palladium, tungsten, rhenium, osmium, iridium, gold, silver, copper, and platinum are preferable, and rhenium. , Iridium, and platinum are more preferable, and iridium and platinum are particularly preferable.
The lanthanoid atom is not particularly limited and may be appropriately selected depending on the purpose.For example, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and Lutesium. Among these, neodymium, europium, and gadolinium are preferable.

The host material is preferably a charge transport material.
The host material may be of one type or two or more types, and examples thereof include a configuration in which an electron transporting host material and a hole transporting host material are mixed. Furthermore, the organic light emitting layer may contain a material that does not have charge transporting properties and does not emit light.
Further, the organic light emitting layer may be one layer or two or more layers, and each layer may emit light in different emission colors.

With the light emitting layer material, a red light emitting layer, a green light emitting layer, and a blue light emitting layer can be formed.
The red light emitting layer is formed, for example, by co-evaporating the following CBP (4,4′-N, N′-dicarbazole-biphenyl) as a charge transport material and the following dopant A as a phosphorescent material. be able to.

Examples of the green light emitting layer include the following mCP (1,3-bis (carbazol-9-yl) benzene) as a charge transport material and the following Ir (ppy ₃ ) (tris (2-phenyl) as a phosphorescent material. (Pyridine iridium) can be co-evaporated.

  As the blue light emitting layer, for example, the following mCP (1,3-bis (carbazol-9-yl) benzene) as a charge transport material and the following Firic (iridium (III) bis [(4, 6-difluorophenyl) -pyridinate-N, C2] picolinate).

There is no restriction | limiting in particular in the thickness of the said light emitting layer, According to the objective, it can select suitably, 1 nm-5 micrometers are preferable, 5 nm-1 micrometer are more preferable, 10 nm-500 nm are still more preferable.
The method for forming the light emitting layer is not particularly limited and may be appropriately selected depending on the purpose. For example, resistance heating vapor deposition, electron beam, sputtering, molecular lamination method, coating method (spin coating method, casting method, dip coating) Method) and LB method. Among these, resistance heating vapor deposition and a coating method are particularly preferable.

--- Hole injection layer, hole transport layer-
The material of the hole injection layer and the hole transport layer has any one of a function of injecting holes from the anode, a function of transporting holes, and a function of blocking electrons injected from the cathode. If it is, there will be no restriction | limiting in particular, According to the objective, it can select suitably.
Examples of the material for the hole injection layer and the hole transport layer include carbazole derivatives, triazole derivatives, oxazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamines. Derivatives, amino-substituted chalcone derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aromatic tertiary amine compounds, styrylamine compounds, aromatic dimethylidin compounds, porphyrin compounds, polysilane compounds, poly Examples thereof include (N-vinylcarbazole) derivatives, aniline copolymers, thiophene oligomers, and conductive polymer oligomers such as polythiophene. These may be used individually by 1 type and may use 2 or more types together.

The hole injection layer and the hole transport layer may have a single-layer structure composed of one or more of the materials described above, or a multilayer structure composed of a plurality of layers having the same composition or different compositions. Good.
As a method for forming the hole injection layer and the hole transport layer, for example, a vacuum deposition method, an LB method, a method in which the hole injection / transport agent is dissolved or dispersed in a solvent (a spin coating method, a casting method, a dip method). Coating method). In the case of the coating method, it can be dissolved or dispersed together with the resin component.
The resin component is not particularly limited and may be appropriately selected depending on the intended purpose. For example, polyvinyl chloride resin, polycarbonate resin, polystyrene resin, polymethyl methacrylate resin, polybutyl methacrylate resin, polyester resin, polysulfone resin , Polyphenylene oxide resin, polybutadiene, poly (N-vinylcarbazole) resin, hydrocarbon resin, ketone resin, phenoxy resin, polyamide resin, ethyl cellulose, vinyl acetate resin, ABS resin, polyurethane resin, melamine resin, unsaturated polyester resin, alkyd Resin, epoxy resin, silicone resin, etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together.
The thicknesses of the hole injection layer and the hole transport layer are not particularly limited and may be appropriately selected depending on the purpose. For example, 1 nm to 5 μm is preferable, 5 nm to 1 μm is more preferable, and 10 nm to 500 nm is still more preferable. .

--Electron injection layer, electron transport layer--
As a material for the electron injection layer and the electron transport layer, any material may be used as long as it has any one of the function of injecting electrons from the cathode, the function of transporting electrons, and the function of blocking holes injected from the anode. There is no restriction | limiting, According to the objective, it can select suitably.
Examples of the material for the electron injection layer and the electron transport layer include triazole derivatives, oxazole derivatives, oxadiazole derivatives, fluorenone derivatives, anthraquinodimethane derivatives, anthrone derivatives, diphenylquinone derivatives, thiopyrandioxide derivatives, carbodiimide derivatives, Metal complexes of fluorenylidenemethane derivatives, distyrylpyrazine derivatives, heterocyclic tetracarboxylic anhydrides such as naphthaleneperylene, phthalocyanine derivatives, 8-quinolinol derivatives, metal phthalocyanines, benzoxazole and benzothiazole ligands And various metal complexes represented by These may be used individually by 1 type and may use 2 or more types together.

The electron injection layer and the electron transport layer may have a single layer structure made of one or more of the materials described above, or may have a multilayer structure made of a plurality of layers having the same composition or different compositions.
As a method for forming the electron injection layer and the electron transport layer, for example, a vacuum deposition method, an LB method, a method in which the electron injection / transport agent is dissolved or dispersed in a solvent (a spin coating method, a casting method, a dip coating method, etc.) ) Etc. are used. In the case of the coating method, it can be dissolved or dispersed together with the resin component, and as the resin component, for example, those exemplified in the case of the hole injection transport layer can be applied.
There is no restriction | limiting in particular in the thickness of the said electron injection layer or an electron carrying layer, According to the objective, it can select suitably, 1 nm-5 micrometers are preferable, 5 nm-1 micrometer are more preferable, 10 nm-500 nm are still more preferable.

--- Barrier layer--
The barrier layer is not particularly limited as long as it has a function of preventing permeation of oxygen, moisture, nitrogen oxides, sulfur oxides, ozone and the like in the atmosphere, and can be appropriately selected depending on the purpose.
There is no restriction | limiting in particular as a material of the said barrier layer, According to the objective, it can select suitably, For example, SiN, SiON, etc. are mentioned.
There is no restriction | limiting in particular as thickness of the said barrier layer, Although it can select suitably according to the objective, 5 nm-1,000 nm are preferable, 7 nm-750 nm are more preferable, 10 nm-500 nm are especially preferable. If the thickness of the barrier layer is less than 5 nm, the barrier function for preventing the permeation of oxygen and moisture in the air may be insufficient. If the thickness exceeds 1,000 nm, the light transmittance decreases and the transparency is reduced. May be damaged.
As for the optical properties of the barrier layer, the light transmittance is preferably 80% or more, more preferably 85% or more, and still more preferably 90% or more.
There is no restriction | limiting in particular as a formation method of the said barrier layer, According to the objective, it can select suitably, For example, CVD method, a vacuum evaporation method, etc. are mentioned.

--Board--
The substrate may be appropriately selected in its shape, structure, size, etc. In general, the substrate is preferably plate-shaped. The structure of the substrate may be a single layer structure, a laminated structure, may be formed of a single member, or may be formed of two or more members. The substrate may be colorless and transparent or colored and transparent, but is preferably colorless and transparent in that it does not scatter or attenuate light emitted from the light emitting layer.

  The material for the substrate is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include inorganic materials such as yttria-stabilized zirconia (YSZ) and glass; polyethylene terephthalate resin, polybutylene phthalate resin, polyethylene naphthalate. Examples thereof include polyester resins such as resins, organic materials such as polystyrene resins, polycarbonate resins, polyethersulfone resins, polyarylate resins, polyimide resins, polycycloolefin resins, norbornene resins, and poly (chlorotrifluoroethylene) resins. These may be used individually by 1 type and may use 2 or more types together.

  When glass is used as the substrate, it is preferable to use non-alkali glass as the material in order to reduce ions eluted from the glass. Moreover, when using soda-lime glass, it is preferable to use what gave barrier coatings, such as a silica (for example, barrier film board | substrate). In the case of an organic material, it is preferable that it is excellent in heat resistance, dimensional stability, solvent resistance, electrical insulation, and workability.

  When the thermoplastic substrate is used, a hard coat layer, an undercoat layer, or the like may be further provided as necessary.

-Optical functional layer-
The optical functional layer is a layer that controls a light emitting region in the organic electroluminescent element, and may have a function of controlling an opening corresponding to the size of the rectangular pixel region.
There is no restriction | limiting in particular as said optical function layer, According to the objective, it can select suitably, For example, a well-known black matrix layer is mentioned.

-Structure of organic electroluminescence display-
Here, there is no restriction | limiting in particular as a structure of the said organic electroluminescent display part, According to the objective, it can select suitably, For example, (1) The light emission side electrode (anode) in an organic electroluminescent display part, ( 2) Optical length of optical resonator structure (microcavity structure), (3) Bottom emission type or top emission type, and the like.

As the electrode (anode) on the light emission side of the organic electroluminescence display section (1), in the bottom emission type, a transparent electrode (for example, ITO) having a reflectance of 10% or less as viewed from the light emitting layer, or the light emitting layer is used. A transflective electrode (eg, an Ag electrode) having an observed reflectance exceeding 10% can be used. If a transparent electrode is used as the anode, the optical resonator structure cannot be formed because light reflection is weak. When a transflective electrode is used as the anode, an optical resonator structure can be formed.
In the top emission type, an optical resonator structure is formed by using a transflective electrode with a reflectance exceeding 10% as viewed from the light emitting layer as an electrode (anode) on the light emission side.

The optical length of the optical resonator structure (2) can be appropriately adjusted by changing the thickness of the organic compound layer between the anode and the cathode constituting the organic electroluminescence display unit. Here, there is no restriction | limiting in particular as said organic compound layer, According to the objective, it can select suitably, For example, a hole transport layer, a hole injection layer, a light emitting layer, an electron transport layer, an electron injection layer, etc. are mentioned. .
Here, the optical resonator structure means a structure in which the light-transmitting side transflective layer interferes with the light-exiting reflective layer.

The (3) bottom emission type or top emission type structure will be described with reference to the drawings.
Here, FIG. 4 is a schematic cross-sectional view showing a bottom emission type organic electroluminescent device which is an example of the organic electroluminescent device of the present invention. FIG. 5 is a schematic cross-sectional view showing a top emission type organic electroluminescent device which is an example of the organic electroluminescent device of the present invention.

A bottom emission type organic electroluminescent device 100 of FIG. 4 has an organic electroluminescent display unit 101 (anode 12, hole injection layer 13, hole transport layer 14, light emitting layer 15, electron transport layer 16, and electron on a glass substrate 11. A lens 30 is formed on the glass substrate 11 as the light extraction surface.
The top emission type organic electroluminescent device 200 of FIG. 5 is formed on a glass substrate 11 with an organic electroluminescent display unit 201 (anode 12, hole injection layer 13, hole transport layer 14, light emitting layer 15, electron transport layer 16, electron transport layer 16). The gas barrier layer 19 is formed on the cathode 18, and the lens 30 is formed on the gas barrier layer 19 as a light extraction surface.
The “light emission direction” indicates a direction in which light from the light emitting layer is emitted from the light extraction surface to the outside of the organic electroluminescence device. In the case of the bottom emission type organic electroluminescent device 100 shown in FIG. 4, as indicated by an arrow, the direction from the light emitting layer 15 toward the lower side in parallel with the drawing is shown. In the case of the top emission type organic electroluminescent device 200 shown in FIG. 5, as indicated by an arrow, the upward direction is shown parallel to the drawing as viewed from the light emitting layer 15.

  As a method of making the organic electroluminescent device of a full color type, for example, a layer structure that emits light corresponding to three primary colors (blue (B), green (G), and red (R)) is formed on a substrate. And a three-color light emission method arranged in the above.

(Method for manufacturing organic electroluminescent display device)
According to another aspect of the present invention, there is provided a method for manufacturing an organic light emitting display device, comprising: a rectangular pixel region of three colors corresponding to each of red, green, and blue formed by an organic electroluminescent element including at least a light emitting layer; Of the rectangular pixel regions, 2 on the light emitting surface of another rectangular pixel region having a luminance lower than the luminance in one rectangular pixel region with respect to the length of the short side in the other rectangular pixel region. And a hemispherical lens having a lens diameter of not less than 4 times and not more than 4 times, wherein the hemispherical lens is disposed at least on the light emitting surface of the other rectangular pixel region. Including other steps as necessary.

  There is no restriction | limiting in particular as a formation method of the said hemispherical lens, Although it can select suitably according to the objective, For example, the inkjet method, the imprint method, the photolithographic method etc. are mentioned.

  As the imprint method, a mold structure having a concave portion corresponding to the shape and arrangement pattern of a hemispherical lens disposed on a rectangular pixel region by using a composition solution containing either a photocurable resin or a thermoplastic resin. The method of forming the said hemispherical lens by hardening the said composition solution after apply | coating on a body is mentioned.

  As the inkjet method, a composition solution containing either the photo-curable resin or the thermoplastic resin is applied by an inkjet method, and then the hemispherical lens is formed by curing the composition solution. A method is mentioned. In the ink jet method, the composition solution dropped by ink jet is cured in a lens shape by surface tension.

  The photocurable resin and the thermoplastic resin used for forming these hemispherical lenses are not particularly limited as long as they are cured by light irradiation or heat application, and are appropriately selected according to the purpose. can do.

  The hemispherical lens formed by the method for forming the hemispherical lens is not particularly limited, but is preferably formed as a light extraction member in which a plurality of hemispherical lenses are arranged on the surface of the sheet-like portion.

  Further, the alignment method of the hemispherical lens formed by the method of forming the hemispherical lens is not particularly limited, and examples thereof include a method using an alignment mark using a binocular microscope and a method using external alignment.

  There is no restriction | limiting in particular as said other process, According to the objective, it can select suitably, For example, the process of a well-known process is mentioned as a manufacturing process of an organic electroluminescent display apparatus.

  For matters other than those described above, all the matters described in the organic light emitting display device of the present invention can be applied.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

Example 1
<Preparation of organic electroluminescence display>
On the TFT (Thin Film Transistor), organic electroluminescent elements corresponding to the respective rectangular pixel regions of red, green, and blue were formed as follows.

  On the reflective electrode (aluminum) of the TFT, as a hole injection layer, 2-TNATA (4,4 ′, 4 ″ -tris (2-naphthylphenylamino) triphenylamine) and F4-TCNQ (tetrafluoro) Tetracyanoquinodimethane) was co-evaporated with 99: 1 (2-TNATA: F4-TCNQ) to form a 40 nm thick hole injection layer.

  On the hole injection layer, α-NPD (N, N′-dinaphthyl-N, N′-diphenyl- [1,1′-biphenyl] -4,4′-diamine) is evaporated to 10 nm, and then 3 , 6-Bis (carbazol-1-yl) -1-phenylcarbazole was evaporated to 3 nm to form a hole transport layer having a total thickness of 13 nm.

  A light emitting layer was formed on the hole injection layer. In addition, formation of the light emitting layer formed the red light emitting layer, the green light emitting layer, and the blue light emitting layer as follows for every organic electroluminescent element corresponding to each rectangular pixel area | region of red, green, and blue.

[Red emission layer]
The red light-emitting layer is formed by co-evaporating BAlq (bis- (2-methyl-8-quinolinolate) -4- (phenylphenolate) aluminum) and Compound R at 95: 5 (BAlq: Compound R) to obtain a thickness. Formed at 30 nm.

The green light emitting layer was co-deposited with mCP (1,3-bis (carbazol-9-yl) benzene) and Ir (ppy ₃ ) (tris (2-phenylpyridineiridium)) at 85:15, The film was formed with a thickness of 25 nm.

  The blue light emitting layer was formed with a thickness of 35 nm by co-evaporating mCP and Compound B at 85:15 (mCP: Compound B).

  BAlq was deposited to 39 nm on each light emitting layer, and then BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) was deposited to 1 nm to form an electron transport layer having a total thickness of 40 nm.

  LiF was deposited on the electron transport layer to form an electron injection layer having a thickness of 1 nm.

  Al was evaporated to 1.5 nm on the electron injection layer, and then Ag was evaporated to 20 nm to form a transflective electrode having a total thickness of 21.5 nm.

An organic electroluminescent display unit is formed by depositing SiON to form a 3 μm-thick sealing layer on the light emitting display unit having the red, green, and blue organic electroluminescent elements on which the transflective electrodes are formed. Formed.
A black matrix (aperture 90 μm × 10 μm (aperture ratio 27%)) prepared on glass is bonded to the light emitting element, and the red light emitting layer, the green light emitting layer, and the blue light emitting in the organic electroluminescence display portion are bonded. A red pixel region, a green pixel region, and a blue pixel region corresponding to each organic electroluminescent element including the layer were formed.

<Production of light extraction member>
A glass mold having a concave portion corresponding to the shape and arrangement (a plurality of lenses having a lens diameter of 30 μm and a plurality of lenses having a lens diameter of 10 μm) indicated by white lines in FIG. 1 is covered with the glass mold. A photocurable resin composition solution (PAK-02, manufactured by Toyo Gosei Kogyo Co., Ltd.) was added dropwise to the film, and applied by spin coating. Co., Ltd .: Q65FA), UV irradiation (1,000 mJ / cm ² ) is performed from the PET resin sheet side to cure the photocurable resin composition solution, and the glass mold is peeled from this state. FIG. 1 shows the shape and arrangement of the lenses (light collection including a plurality of lenses having a lens diameter of 30 μm and a plurality of lenses having a lens diameter of 10 μm. The out member was produced.

<Manufacture of organic electroluminescence display device>
A plurality of lenses having a lens diameter of 30 μm are arranged at positions on the red pixel area and blue pixel area of the organic electroluminescence display unit, and a plurality of lenses having a lens diameter of 10 μm are arranged at positions on the green pixel area. As described above, a light extraction member was arranged on the organic electroluminescent display portion, and the organic electroluminescent display device in Example 1 was manufactured (see FIG. 1).

(Example 2)
In place of producing the light extraction member in Example 1, the light extraction member was produced as follows, and the organic electroluminescence display device in Example 2 was produced. The organic electroluminescent display device in 2 was manufactured.

That is, on the glass mold having concave portions corresponding to the shape and arrangement of the lenses indicated by white lines in FIG. 2 (a plurality of lenses having a lens diameter of 30 μm and a plurality of lenses having a lens diameter of 10 μm). A photocurable resin composition solution (PAK-02, manufactured by Toyo Gosei Kogyo Co., Ltd.) is dropped so as to cover it, and is applied by spin coating. Then, the application surface formed flat is placed on the red pixel region and the blue pixel region. A plurality of lenses having a lens diameter of 30 μm are arranged at positions, and a plurality of lenses having a lens diameter of 10 μm are arranged at positions on the green pixel region, and are aligned with the surface of the organic electroluminescence display unit. And superimposed.
Next, UV irradiation (1,000 mJ / cm ² ) is performed from the glass mold side, the photocurable resin composition solution is cured, and the glass mold is peeled from this state to produce a light extraction member. A plurality of lenses having a lens diameter of 30 μm are arranged at positions on the red pixel area and blue pixel area of the organic electroluminescence display unit, and a plurality of lenses having a lens diameter of 10 μm are arranged at positions on the green pixel area. An organic light emitting display device according to Example 2 was manufactured (see FIG. 2).

(Example 3)
2 except that a glass mold having a recess corresponding to the shape and arrangement of the lens indicated by the white line in FIG. 3A was used in place of the glass mold having a depression corresponding to the shape and arrangement of the lens indicated by the white line in FIG. In the same manner as in Example 2, an organic electroluminescence display device in Example 3 was manufactured (see FIG. 3A).

Example 4
2 except that a glass mold having a recess corresponding to the shape and arrangement of the lens indicated by the white line in FIG. 3B was used in place of the glass mold having a depression corresponding to the shape and arrangement of the lens indicated by the white line in FIG. The organic electroluminescent display device in Example 4 was manufactured in the same manner as Example 2 (see FIG. 3B).

(Comparative Example 1)
In Example 1, the organic electroluminescent display device in Comparative Example 1 was manufactured in the same manner as in Example 1 except that no light extraction member was disposed on the organic electroluminescent display unit.

(Comparative Example 2)
In Example 1, light is emitted using a glass mold having concave portions corresponding to the shape and arrangement of the lenses shown by white lines in FIG. 1 (a plurality of lenses having a lens diameter of 30 μm and a plurality of lenses having a lens diameter of 10 μm). A plurality of lenses each having a lens diameter of 10 μm using a glass mold having concave portions corresponding to a lens array in which a plurality of lenses each having a lens diameter of 10 μm are arranged in a grid pattern on the entire surface. An organic electroluminescent display device in Comparative Example 2 was produced in the same manner as in Example 1 except that a light extraction member containing s was produced.

(Comparative Example 3)
In Example 1, light is emitted using a glass mold having concave portions corresponding to the shape and arrangement of the lenses indicated by white lines in FIG. 3A (a plurality of lenses having a lens diameter of 30 μm and a plurality of lenses having a lens diameter of 10 μm). A plurality of lenses each having a lens diameter of 10 μm using a glass mold having concave portions corresponding to a lens array in which a plurality of lenses each having a lens diameter of 10 μm are arranged in a grid pattern on the entire surface. An organic electroluminescent display device according to Comparative Example 3 was manufactured in the same manner as in Example 1 except that a light extraction member including the above was produced.

(Comparative Example 4)
In Example 3, using the lens array shown in FIG. 3A, a plurality of lenses each having a lens diameter of 30 μm are arranged at a position on the blue pixel region of the organic electroluminescence display unit, on the blue pixel region and the green pixel region. In place of arranging the light extraction member on the organic electroluminescent display unit so that a plurality of lenses having a lens diameter of 10 μm are arranged at the position, the position on the green pixel region of the organic electroluminescent display unit, A light extraction member is disposed on the organic electroluminescence display unit so that a plurality of lenses having a lens diameter of 30 μm are arranged, and a plurality of lenses having a lens diameter of 10 μm are arranged at positions on the blue pixel region and the red pixel region. The organic electroluminescent display device in Comparative Example 4 was produced in the same manner as in Example 3 except that.

<Measuring method of length of short side in rectangular pixel region>
The pixel is caused to emit light, and the length of the short side in the rectangular pixel region is measured with a microscope (Olympus Co., Ltd .: STM6-LM-F35), and the average value is within 1% for both RGB pixels. It was confirmed.

<Lens diameter measurement method>
The lens diameter was measured with a microscope (Olympus Co., Ltd .: STM6-LM-F35) at five points, and it was confirmed that the average value was within an error range of 1%.

<Evaluation of organic electroluminescence display device>
For the organic electroluminescence display devices in Examples 1 to 4 and Comparative Examples 1 to 4, the luminance, power consumption, and element lifetime were evaluated as follows.

<Evaluation of drive power>
Driving state in which the organic EL display devices in Examples 1 to 4 and Comparative Examples 1 to 4 are connected to an external power source, and the front luminance of white light is 800 cd / m ² based on the total emission of red, green, and blue Set to. The front brightness of white is a luminance meter (Topcom Co., Ltd .: SR-3) at the same height in the vertical direction as the center of the light emitting display element and at a position of 5 ° in the horizontal direction of the center, from the light emitting display element. It was installed at a position 1 meter away.
The driving power at that time was measured by a source measure unit 2400 (manufactured by KEITHLEY) and calculated by adding up the power of each color of RGB.

  The organic electroluminescence display device of the present invention can emit light with high brightness with uniform brightness and has no nonuniformity in driving power and device life. For example, a computer, an on-vehicle display, an outdoor display, It can be suitably used in various fields including household equipment, business equipment, home appliances, traffic-related indicators, clock indicators, calendar indicators, luminescent screens, audio equipment and the like.

1, 10, 20, 25, 100, 200 Organic electroluminescence display device 2 Optical functional layer 3R Red rectangular pixel region 3G Green rectangular pixel region 3B Blue rectangular pixel region 4 Hemispherical lens (large)
5 Hemispherical lens (small)
DESCRIPTION OF SYMBOLS 11 Glass substrate 12 Anode 13 Hole injection layer 14 Hole transport layer 15 Light emitting layer 16 Electron transport layer 17 Electron injection layer 18 Cathode 19 Barrier layer 30 Lens 101, 201 Organic electroluminescent element (organic electroluminescent display part)

Claims (7)

  A rectangular pixel region of three colors corresponding to each of red, green, and blue formed by an organic electroluminescent element including at least a light emitting layer, and one rectangular pixel region among the rectangular pixel regions of the three colors A hemispherical lens having a lens diameter of 2 to 4 times the length of the short side of the other rectangular pixel region on the light emitting surface of the other rectangular pixel region having a luminance lower than that of And an organic electroluminescent display device.   Of the three-color rectangular pixel areas, on the light emitting surface corresponding to the rectangular pixel area having the highest luminance, the length of the short side of the rectangular pixel area is one or more times, and the rectangular pixel area The organic electroluminescent display device according to claim 1, further comprising a hemispherical lens having a lens diameter smaller than a lens diameter on a light emitting surface of another rectangular pixel region having a luminance lower than that in the shape pixel region.   The other rectangular pixel region having a luminance lower than that in the one rectangular pixel region is a rectangular pixel region corresponding to each of red and blue, and the one rectangular pixel region is a rectangular pixel region corresponding to green. The organic electroluminescent display device according to claim 1, wherein the organic electroluminescent display device is a shape pixel region.   The organic electroluminescent element has an optical resonator structure that selectively takes out light of an arbitrary wavelength from the light emitting surface side by disposing a light emitting layer between the reflective electrode and the semi-transmissive electrode. An organic electroluminescent display device according to claim 1.   The organic electroluminescent display device according to claim 1, wherein the light emitting layer contains at least one phosphorescent material. A rectangular pixel region of three colors corresponding to each of red, green, and blue formed by an organic electroluminescent element including at least a light emitting layer, and one rectangular pixel region among the rectangular pixel regions of the three colors A hemispherical lens having a lens diameter of 2 to 4 times the length of the short side of the other rectangular pixel region on the light emitting surface of the other rectangular pixel region having a luminance lower than that of And an organic electroluminescent display device manufacturing method comprising:
A method for manufacturing an organic light emitting display device, wherein the hemispherical lens is disposed at least on a light emitting surface of the other rectangular pixel region.   The method for manufacturing an organic light emitting display device according to claim 6, wherein the hemispherical lens is formed by an imprint method using a photocurable resin and a thermoplastic resin.