JP2001093666A - Organic led display device and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive organic LED display, capable of a full-color display on a large display screen with superior display quality at a low cost without electrode disconnections. SOLUTION: (1) This organic LED display device comprises a substrate, first electrode, organic layer, partition wall projecting over the first electrode and second electrode. The first and second electrodes are matrix-like electrodes consisting of plural rows of electrodes, and the partition wall arranged in the direction parallel with the first electrode row is structured without an overhung part higher than the organic layer. Alternatively, (2) the display device comprises a substrate, a first electrode, a thin-film transistor, an organic layer, grid-like partition walls projecting over the first electrode and surrounding the organic layer and a second electrode. At least one of the partition walls is structured without an overhung part higher than the organic layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an organic LED display and a method for manufacturing the same. For more information,
The present invention relates to an organic LED display capable of full-color display in which a plurality of organic LED elements (pixels) each including a light-emitting layer or an organic layer including a light-emitting layer and a charge transport layer are provided, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, an electroluminescent device using an organic compound (hereinafter referred to as "organic LED device") has attracted attention. In particular, the organic LED devices reported by Tang et al.
Electroluminescent device (inorganic EL device) using inorganic compound with a two-layer structure in which a hole transport layer and an electron transporting light emitting layer are laminated.
In comparison with, it is possible to drive at a lower voltage, achieve higher luminous efficiency and higher luminance, and easily obtain multicolor light emission [Appl. Phys.
tt. 51, p. 913 (1987)].

Further, an organic LED including an organic layer obtained by spin-coating a coating liquid containing an organic compound (polymer material)
It has been reported that high-luminance light emission can be obtained by driving at a low voltage also in an element (International Patent Publication No. WO901314).
No. 8). With the advancement of such technology, the possibility of an organic LED display capable of inexpensive and full-color display has become more realistic.

However, in the method of forming an organic layer by a spin coating method or a doctor blade method using a coating liquid containing a polymer material, it is very difficult to pattern the organic layer. In recent years, as one solution to this problem, a matrix partition is formed on an electrode by lithography, or a resin black resist is formed in a matrix between ITO (indium tin oxide) electrodes, and the partition or the partition is formed. A method has been proposed in which an organic layer that emits light of three primary colors is formed in a partition wall of a resin black resist by using an ejection device based on an ink jet method [Japanese Patent Laid-Open No. Hei 10
-12377, JP-A-10-153967, JP-A-11-40358, JP-A-11-74
076, Appl. Phys. Lett. 72, p. 9519 (1998)].

The partition walls and the partition walls of the resin black resist in the above-mentioned prior art function as a light blocking layer or a wall for preventing a coating liquid from dripping when an organic layer is formed by an ink jet method. On the other hand, such a partition wall structurally causes disconnection of an electrode provided on the organic layer, but the above-mentioned prior art document does not disclose any solution to this problem.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive, large-screen, full-color organic LED display with excellent display quality without disconnection of electrodes.

[0007]

Means for Solving the Problems From the above point of view, the present inventors have conducted intensive studies and as a result, it has been found that in organic LED displays capable of full-color display, patterning of an organic layer can be easily performed by providing partition walls of a specific shape. The present inventors have found that the problem of disconnection of the electrode provided on the organic layer can be solved, and have completed the present invention.

Thus, according to the present invention, an organic LED including a light emitting layer or an organic layer comprising a light emitting layer and a charge transport layer
An organic LED display in which a plurality of elements (pixels) are arranged, comprising a substrate, a first electrode formed on the substrate, an organic layer, a partition protruding above the first electrode, and a second electrode. A first electrode and a second electrode are a matrix-like electrode composed of a plurality of rows, and a partition arranged in a direction parallel to the rows of the first electrodes has a structure without an overhang portion at a position higher than the organic layer. In addition, an organic LED display is provided, wherein the corner is a part of an arc protruding outward.

Further, according to the present invention, there is provided an organic LED display in which a plurality of organic LED elements (pixels) each including a light emitting layer or an organic layer composed of a light emitting layer and a charge transport layer are arranged. A thin film transistor for driving the formed first electrode and pixel, an organic layer,
A grid-like partition protruding over the electrode and surrounding the organic layer; and a second electrode, at least one of the partition having a structure without an overhang portion at a position higher than the organic layer, and a corner portion protruding outward. An organic LED display is provided, wherein the organic LED display is part of a circular arc.

Further, according to the present invention, the above organic LE
A method for producing a D display, wherein at least one of the organic layers is formed by a printing method.
A method for manufacturing an ED display is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the organic LED element (pixel) generally includes a substrate 1, a first electrode 2, an organic layer 3, and a second electrode 4. The organic LED display of the present invention is configured by arranging a plurality of such pixels, and has a partition wall 5 between each pixel. Further, from the viewpoint of display quality of the display, for example, contrast, it is preferable that the deflection plate 6 is provided outside the substrate 1, and further from the viewpoint of display reliability, the deflecting plate 6 is provided on the second electrode 4. Preferably, a sealing film or a sealing substrate 7 is provided.

As the substrate, any of a quartz substrate, a glass substrate, a plastic substrate and the like can be used, and the substrate is not particularly limited thereto.

The organic layer comprises a light-emitting layer or a light-emitting layer and a charge transport layer (an electron transport layer and a hole transport layer). The light-emitting layer and the charge transport layer may each have a single-layer structure or a multilayer structure. . The light emitting layer is formed of a coating liquid for forming a light emitting layer in which a known light emitting material for an organic LED or an organic photoconductor and optionally a known polymer material and an additive are dissolved or dispersed in a solvent. The charge transport layer is formed by a coating liquid for forming a charge transport layer in which a known charge transport material for an organic LED or an organic photoconductor and optionally a known polymer material and an additive are dissolved or dispersed in a solvent. Is done.

The materials of the first and second electrodes sandwiching the organic layer are selected according to the configuration of the organic LED display. That is, in the organic LED display, when the substrate is a transparent substrate and the first electrode is a transparent electrode, the light emitted from the organic layer is emitted from the substrate side. Is a reflective electrode,
Alternatively, it is preferable to provide a reflection film (not shown) on a surface of the second electrode that is not adjacent to the organic layer. Conversely, when the second electrode is a transparent electrode, light emission from the organic layer is emitted from the second electrode side, so that the first electrode is used as a reflective electrode or the first electrode is placed between the first electrode and the substrate. It is preferable to provide a reflective film (not shown) on the substrate.

As a material of the transparent electrode, for example, Cu
I, ITO (indium tin oxide), SnO ₂ , ZnO
And the like CuAlO _2, and examples of the material for the reflective electrode, for example, metals such as aluminum and calcium, magnesium - silver and lithium - alloys such as aluminum, laminated film between the metals, such as magnesium / silver, and fluoride Examples include a laminated film of an insulator such as lithium / aluminum and a metal.

The partition may have a single-layer structure or a multilayer structure.
It may be arranged between each pixel or between different emission colors. The material of the partition walls is preferably a solvent in which a luminescent material, a charge transporting material or a polymer material is dissolved or dispersed, that is, a material which is insoluble or hardly soluble in a solvent of the luminescent layer forming coating liquid or the charge transporting layer forming coating liquid. From the viewpoint of improving the display quality as a display, it is particularly preferable to use a material for a black matrix (for example, chromium and resin black).

Next, the arrangement of the organic LED elements (pixels) will be described. In the organic LED display of the present invention, a plurality of pixels are arranged in a matrix with the partition wall 5 interposed therebetween, and full-color display is possible by giving these pixels a plurality of emission colors. As the plurality of emission colors, a combination of red, green, and blue is preferable.

The arrangement of the pixels is, for example, as shown in FIG.
The stripe arrangement in which red (R) light emitting pixels 8, green (G) light emitting pixels 9, and blue (B) light emitting pixels 10 are arranged as shown in FIG. Also, the arrangement of pixels is shown in FIG.
(B) A mosaic arrangement, a delta arrangement, and a square arrangement as shown in 2 (c) and 2 (d), respectively. The ratio of the occupied area of each of the R light emitting pixel 8, the G light emitting pixel 9, and the B light emitting pixel 10 does not necessarily need to be 1: 1: 1 as shown in FIG. May be the same or different for each pixel.

Next, between the first electrode corresponding to each pixel and the second
A connection method between the electrodes will be described. Organic LE of the present invention
The D display is configured such that, for example, as shown in FIG. 3A, a first electrode 2 and a second electrode 4 sandwiching an organic layer 3 are striped electrodes orthogonal to each other on a common substrate 1. The first electrode 2 or the second electrode 4 is connected to a common electrode via a thin film transistor (TFT) 11 as shown in FIG. In the figure, 12 indicates a source bus line, and 13 indicates a gate bus line.

Next, the shape and size of the partition will be described. The partition wall is formed so as to protrude above the first electrode and surround the organic layer, and has the following shape depending on the connection between the first electrode and the second electrode. As shown in FIG. 3A, when the first electrode 2 and the second electrode 4 are a plurality of stripe-shaped electrodes, the partitions arranged in a direction parallel to the rows of the first electrodes are organic. It has a structure without an overhang portion at a position higher than the layer.

As a structure having no overhang portion, as shown in FIG. 4A, a structure having the same shape or tapering upward from the upper surface of h0 and projecting therefrom can be cited. In the figure, h0 represents the thickness (height) of the organic layer.
Since the partition has a structure without an overhang portion in this manner, since there is no overhang portion (projection) at a position higher than the organic layer, there is no shadow of the partition and no portion without electrode material is formed. In addition, the problem of electrode disconnection can be solved. In addition, by providing a part of a circular arc in which the corner of the partition is convex outward, it is possible to prevent disconnection of the electrode material occurring at the corner.

As shown in FIG. 3A, in the case of an organic LED display having stripe-shaped electrodes orthogonal to each other, the partitions are arranged in a direction orthogonal to the rows of the first electrodes. The height h of the partition walls having a structure with an overhang portion at a position higher than the sum of the film thickness of the electrode and the film thickness of the organic layer, and arranged in a direction parallel to the row of the first electrodes
2 and the height h1 of the partition walls arranged in a direction perpendicular to the row of the first electrodes preferably have a relationship of h1> h2 [FIG.
(See (a-2) and (b-2))].

As a structure having an overhang portion, as shown in FIG. 4 (b), a structure in which the upper surface of h3 is tapered upward and protrudes upward. In the figure, h3 is the sum (height) of the thickness of the first electrode and the thickness of the organic layer.
Represents Since the partition has a structure with an overhang portion as described above, an overhang portion (projection) can be formed at a position higher than the organic layer.
Since there is a portion where the electrode material does not adhere, patterning of the electrode can be performed by the partition.

Further, as shown in FIG.
The electrode 2 or the second electrode 4 is a thin film transistor (TF
When connected to a common electrode via T) 11, at least one of the partition walls has a structure without an overhang portion at a position higher than the organic layer.

A method of manufacturing an organic LED display according to the present invention will be described with reference to FIGS. First Embodiment (a-1) to (a-5) and (b-1) to (b-5) of FIG. 6 are cross-sectional views of the organic LED display of FIG. B represents a cross section, and the numbers at the end indicate the same step as in (a-1) and (b-1).

Formation of First Electrode Using the above-mentioned electrode material (for example, ITO), a patterning step (for example, photolithography technique)
A plurality of first electrodes 6 are formed on the substrate 1 so as to form a stripe.
It is formed above (see FIGS. 6 (a-1) and (b-1)).

First, a partition 51 having a thickness h2 is formed in parallel with the first electrode 2 by using a resist, for example, by a normal photolithography technique, and then formed on the first electrode 2 in the same manner as the partition 51. A partition wall 52 having a thickness h1 (h1> h2) is formed in a direction perpendicular to the direction [see FIGS. 6 (a-2) and (b-2)]. Specifically, a partition material layer is formed on a substrate, a resist mask is formed by a photolithography method, and then the partition material layer is etched (etched) by a dry etching method or a wet etching method to form a partition. Is preferred.

Formation of Organic Layer Using the coating liquid for forming a light emitting layer and optionally the coating liquid for forming a charge transport layer, an organic layer comprising a light emitting layer or a light emitting layer and a charge transport layer is formed on the first electrode 2 by a printing method. Form layer 3 [FIG.
(See (a-3) and (b-3)).

Examples of the printing method include conventional methods such as letterpress printing, intaglio printing, lithographic printing, screen printing, and ink-jet printing. Among them, letterpress printing and ink-jet printing which can easily form a thin film of 100 nm or less are used. The method is preferable, and the ink jet method is particularly preferable. Therefore, when an organic layer having a multilayer structure is formed, at least one of the organic layers is preferably formed by an inkjet method. FIG. 5 is a schematic view showing a step of forming an organic layer by an inkjet method. In the figure, 1 is a substrate, 2 is a first electrode, 51 is a partition arranged in a direction parallel to the first electrode row, 52 is a partition arranged in a direction orthogonal to the first electrode row, and 14 is an ink jet Each head is shown.

The above coating liquid is discharged from the ink jet head 14 into the partition walls to form a light emitting layer. As a method of discharging the coating liquid, a piezo method and a discharge method using compressed air, which are less affected by heat, are preferable in consideration of heat deterioration of the organic layer forming coating liquid, and a piezo method is particularly preferable. This step may be a single discharge using one type of coating liquid for one pixel, or a plurality of discharges using a plurality of types of coating liquid. In addition, from the viewpoint of production efficiency, it is preferable to use a plurality of inkjet heads 14 that discharge the coating liquid for each of the coating liquids having different emission colors.

Formation of Second Electrode A second electrode 4 in the form of stripes is formed in a direction orthogonal to the rows of the first electrodes (see FIGS. 6 (a-4) and (b-4)). As a formation method, for example, 1) using a stripe-shaped shadow mask for electrode formation,
A method of forming a striped metal film by evaporating a metal having a predetermined thickness using a dry process or a wet process such as an evaporation method, and 2) partition walls arranged in a direction perpendicular to the rows of the first electrodes. Along the line, a structure having an overhang portion is provided at a position higher than the sum (h3) of the film thickness of the first electrode and the film thickness of the organic layer, and a metal having a predetermined film thickness is deposited by using, for example, a vapor deposition method. By doing so, a method of forming the partition wall and the metal film by disconnecting them in a stripe shape can be given.

Formation of Sealing Film If necessary, the entire surface of the element is sealed with a known material to prevent moisture from the organic LED display [FIG.
(See (a-5) and (b-5)). Formation of Polarizing Plate Further, if necessary, a polarizing plate is provided outside the substrate (on the side opposite to the organic layer) to improve the contrast of the organic LED display.

Embodiment 2 (c-1) to (c-5) and (d-1) to (d-5) of FIG. 7 are CC cross sections of the organic LED display of FIG. , And DD section, and the numbers at the end indicate the same step as in (c-1) and (d-1).

Formation of First Electrode The thin film transistor 11 and the first electrode 2 are formed by a known method (see FIGS. 7C-1 and D-1). Next, partition walls 5 are formed using a resist, for example, by a normal photolithography technique (see FIGS. 7C-2 and D-2).

Formation of Organic Layer Using the above-mentioned coating solution for forming a light emitting layer and optionally a coating solution for forming a charge transport layer, an organic layer comprising a light emitting layer or a light emitting layer and a charge transport layer is formed on the first electrode 2 by a printing method. The layer 3 is formed. [See FIGS. 7 (c-3) and (d-3)]. Formation of Second Electrode The second electrode 4 is formed by a dry process such as an evaporation method or a wet process [FIGS. 7 (c-4) and (d-4)].
reference〕.

Formation of Sealing Film If necessary, the entire surface of the device is sealed with a known material to prevent moisture from the organic LED display [FIG.
(See (c-5) and (d-5)). Formation of Polarizing Plate Further, if necessary, a polarizing plate is provided outside the substrate (on the side opposite to the organic layer) to improve the contrast of the organic LED display.

[0037]

EXAMPLES The present invention will be described more specifically with reference to examples, but the present invention is not limited by these examples. Examples 1 and 2 show specific examples of the first embodiment, and Examples 3 and 4 show specific examples of the second embodiment.

Example 1 An ITO transparent stripe electrode having a pitch of 120 μm and a width of 100 μm was formed as a first electrode on a glass substrate with ITO having a thickness of 130 nm by photolithography. Next, the substrate was washed by a conventional wet process (isopropyl alcohol, acetone and pure water), and further washed by a conventional dry process (UV ozone treatment and plasma treatment). Next, using a positive resist on this substrate, a tape having a pitch of 120 μm in a direction parallel to the row of ITO electrodes, a pitch of 200 μm in a direction perpendicular to the row of ITO electrodes, a width of 40 μm, and a thickness of 20 μm. A partition having a cross section was formed by a photoresist method.

With a commercially available ink jet printer, 3,
Film thickness of 50 using 4-polyethylenedioxythiophene
A hole transport layer having a thickness of nm was formed. Next, using a commercially available inkjet printer, a coating liquid containing a luminescent material that emits red, green and blue light is applied by patterning to a film thickness of 50 n.
m light emitting layers were formed. A cyanopolyphenylenevinylene precursor was used as a red light-emitting material, a polyphenylenevinylene precursor was used as a green light-emitting material, and polyparaphenylene was used as a blue light-emitting material. Cyanopolyphenylene vinylene precursor and polyphenylene vinylene precursor,
After the film formation, a heat treatment was performed at 150 ° C. for 6 hours in an argon (Ar) atmosphere to obtain cyanopolyphenylenevinylene and polyphenylenevinylene, respectively.

Next, an AlLi alloy electrode having a thickness of 0.2 μm, a width of 300 μm, and a pitch of 320 μm was formed as a second electrode by an evaporation method using a shadow mask. Finally, the obtained device was sealed with an epoxy resin. In the organic LED display manufactured as described above, no disconnection of the second electrode occurs, and no short circuit occurs between the first electrode and the second electrode, between the first electrode, and between the second electrodes. Was. In addition, non-uniform light emission in each pixel due to non-uniform film thickness of the light emitting layer and the charge transport layer was not observed.

Example 2 A glass substrate having a thickness of 130 nm was formed by photolithography as a first electrode at a pitch of 120 μm and a width of 100 μm.
A μm ITO transparent stripe electrode was formed. Next, the substrate was washed by a conventional wet process (isopropyl alcohol, acetone and pure water), and further washed by a conventional dry process (UV ozone treatment and plasma treatment). Next, using a positive resist on this substrate, a pitch of 1 is applied in a direction parallel to the row of ITO electrodes.
A barrier having a tapered cross section of 20 μm, width of 40 μm, and thickness of 15 μm is formed by a photoresist method, and using a negative resist, a pitch of 200 μm in a direction orthogonal to the row of the ITO electrodes, a width of 40 μm, and a thickness of 15 μm. A partition having an inverse tapered cross section was formed by a photoresist method.

In the same manner as in Example 1, a hole transport layer and a light emitting layer were formed. Next, an AlLi alloy electrode having a thickness of 0.2 μm was formed as a second electrode by an evaporation method. Finally, the obtained device was sealed with an epoxy resin. In the organic LED display manufactured as described above, no disconnection of the second electrode occurs, and no short circuit occurs between the first electrode and the second electrode, between the first electrode, and between the second electrodes. Was. In addition, non-uniform light emission in each pixel due to non-uniform film thickness of the light emitting layer and the charge transport layer was not observed.

Example 3 A thin film transistor was formed on a glass substrate, and an ITO transparent electrode having a long side of 200 μm and a short side of 120 μm was formed as a first electrode. Next, a partition having a width of 40 μm and a thickness of 20 μm and having a tapered cross section was formed on the substrate by a photoresist method using a positive resist. Subsequently, a hole transport layer and a light emitting layer are formed in the same manner as in Example 1.
A second electrode was formed in the same manner as in Example 2, and the device finally obtained was sealed with an epoxy resin. In the organic LED display manufactured as described above, the second
No disconnection of the electrodes occurred, and no short circuit occurred between the first and second electrodes, between the first electrodes, and between the second electrodes. In addition, non-uniform light emission in each pixel due to non-uniform film thickness of the light emitting layer and the charge transport layer was not observed.

Example 4 A thin film transistor was formed on a glass substrate, and an AlLi reflective electrode was formed as a first electrode. Next, a partition wall was formed on this substrate in the same manner as in Example 3, a hole transport layer and a light emitting layer were formed in the same manner as in Example 1, and a 0.2 μm-thick ITO transparent film was formed as the second electrode. The electrodes were formed by a vapor deposition method. Finally, the obtained device was sealed with an epoxy resin. In the organic LED display manufactured as described above, no disconnection of the second electrode occurs, and no short circuit occurs between the first electrode and the second electrode, between the first electrode, and between the second electrodes. Was. In addition, non-uniform light emission in each pixel due to non-uniform film thickness of the light emitting layer and the charge transport layer was not observed.

[0045]

The organic LED display of the present invention is an organic LED display in which a plurality of organic LED elements (pixels) each including a light-emitting layer or an organic layer composed of a light-emitting layer and a charge transport layer are arranged. A first electrode, an organic layer, a partition protruding above the first electrode, and a second electrode, the first electrode and the second electrode being a matrix-shaped electrode including a plurality of columns; Partition walls arranged in a direction parallel to the first electrode row have a structure without an overhang portion at a position higher than the organic layer, or
A thin film transistor for driving a first electrode and a pixel formed on a substrate, an organic layer, a grid-like partition protruding above the first electrode and surrounding the organic layer, and a second electrode, and at least one of the partition walls Has a structure without an overhang portion at a position higher than the organic layer.

Further, since a partition is provided and the organic layer is formed by a printing method, particularly, an ink jet method, an organic layer having a uniform thickness can be formed in each pixel, and a luminescent material having a different luminescent color can be formed in each pixel. Do not mix. Therefore, organic LED
It is possible to provide an inexpensive, large-screen, organic LED display capable of full-color display with excellent display quality, in which the production management of the display is simplified, the electrodes are not disconnected.

[Brief description of the drawings]

FIG. 1 is an organic LED of the organic LED display of the present invention.
It is a schematic sectional drawing of an element.

FIG. 2 is a schematic partial plan view of an organic layer of the organic LED display of the present invention.

FIG. 3 is a schematic partial plan view perspective view of (a) an organic LED display having striped electrodes orthogonal to each other and (b) an organic LED display having thin film transistors.

FIG. 4 shows (a) a partition wall without an overhang portion and (b) in the organic LED display of the present invention.
It is a schematic sectional drawing of the partition of a structure with an overhang part.

FIG. 5 is a schematic view of a step of forming an organic layer by an inkjet method according to the present invention.

FIG. 6 is a schematic cross-sectional view of a manufacturing step of the organic LED display according to the first embodiment of the present invention, in which (a-1) to
(A-5) shows an AA cross section of FIG.
1) to (b-5) show BB cross sections in FIG.

FIG. 7 is a schematic cross-sectional view of a manufacturing process of the organic LED display according to the second embodiment of the present invention;
(C-5) shows a cross section taken along the line CC in FIG.
1) to (d-4) show DD cross sections in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Substrate 2 1st electrode 3 Organic layer 4 2nd electrode 5 Partition wall 51 Partition wall arranged in the direction parallel to the row of 1st electrode 52 Partition wall arranged in the direction orthogonal to the row of 1st electrode 6 Deflection plate 7 Sealing Stop film or sealing substrate 8 Red (R) light emitting pixel 9 Green (G) light emitting pixel 10 Blue (B) light emitting pixel 11 Thin film transistor (TFT) 12 Source bus line 13 Gate bus line 14 Inkjet printer head h0 Film thickness of organic layer (Height) h1 Height of partition walls arranged in a direction perpendicular to the row of first electrodes h2 Height of partition walls arranged in a direction parallel to the row of first electrodes h3 Film thickness of first electrode and organic layer Sum of film thickness (height)

Claims (6)

[Claims] An organic LED display in which a plurality of organic LED elements each including a light emitting layer or an organic layer composed of a light emitting layer and a charge transport layer are arranged, the substrate comprising: a substrate; a first electrode formed on the substrate; A first electrode and a second electrode are arranged in a matrix in a plurality of rows, and are arranged in a direction parallel to the rows of the first electrodes. Organic EL having a structure in which the formed partition wall has no overhang portion at a position higher than the organic layer, and is a part of an arc whose corners are convex outward.
D display. 2. In a partition surrounding an organic layer in a lattice pattern, a partition arranged in a direction orthogonal to a row of first electrodes is overlaid at a position higher than the sum of the thickness of the first electrode and the thickness of the organic layer. The height h2 of the partition walls having a structure with a hang portion and arranged in a direction parallel to the row of the first electrodes and the height h1 of the partition walls arranged in a direction perpendicular to the row of the first electrodes are h1. The organic LED display according to claim 1, wherein the relationship is> h2. 3. An organic LED display in which a plurality of organic LED elements each including a light-emitting layer or an organic layer composed of a light-emitting layer and a charge transporting layer are arranged, wherein a substrate, a first electrode and a pixel formed on the substrate are formed. A thin-film transistor for driving, an organic layer, a grid-like partition protruding above the first electrode and surrounding the organic layer, and a second electrode, and at least one of the partitions has an overhang portion at a position higher than the organic layer. An organic LED display, which has no structure, and is a part of an arc whose corners are convex outward. 4. The method for manufacturing an organic LED display according to claim 1, wherein the second electrode is formed in a stripe shape by a mask vapor deposition method. Production method. 5. The method for manufacturing an organic LED display according to claim 1, wherein at least one of the organic layers is formed by a printing method. Method. 6. A partition material layer is formed on a substrate, a resist mask is formed by a photolithography method, and then the partition material layer is etched by a dry etching method or a wet etching method to form a partition. The method for manufacturing an organic LED display according to claim 4.