JP2003208105A - Display device and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device and a manufacturing method therefor, improved in an efficiency of manufacture and capable of enlarging a light emitting area of the display. <P>SOLUTION: The display device has such a structure that a first substrate formed with transparent common electrodes and light emitting elements thereon, and a second substrate formed with switching elements for driving a matrix and wiring for driving, and pixel electrodes connected with respective switching elements are superposed on each other with the pixel electrodes electrically connected with the light emitting elements. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel using a self-luminous film represented by an organic EL display.
The present invention relates to a configuration of a display device and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, attention has been paid to organic EL displays as flat panel displays. A method of extracting light toward the back surface of the substrate is generally well known in order to avoid damages during formation of the organic EL element in the organic EL display.

FIG. 9 is a schematic configuration diagram of an organic EL element as a light emitting element. In FIG. 9, an anode electrode film 101 made of a transparent conductive film on a glass substrate 100 and a hole transport layer which is a P-type organic thin film are shown in FIG. 102, a light emitting layer 103, an electron transport layer 104 which is an N-type organic thin film, and a cathode electrode film 105 are formed. Anode electrode film 1 of this organic EL device
01 and the cathode electrode film 105, a light emitting layer 103 between the hole transport layer 102 and the electron transport layer 104 when a voltage is applied.
And emits light in the vicinity thereof.

Here, when the cathode electrode film 105 is formed, a film forming method using plasma or the like such as a sputtering method damages the electron transport layer 104, so that electrons from the cathode electrode film 105 to the electron transport layer 104 are damaged. Injection efficiency is lowered, and the luminous efficiency of the device is deteriorated. Therefore, in the conventional method, an electrode without ionic damage is formed by vacuum deposition such as resistance heating, but a transparent electrode capable of electron injection with low damage cannot be formed by vacuum deposition (high electrode resistance, transmission Since the rate is low and the electron injection efficiency is low), an aluminum film is generally used as the cathode electrode film 105.

Therefore, since the aluminum film has an extremely low light transmittance (reflects), the light emitted from the light emitting layer 103 directly passes through the anode electrode film 101, which is a transparent electrode, and is emitted to the glass substrate 100 side. , Is reflected by the cathode electrode film 105 and is emitted to the glass substrate 100 side.

FIG. 10 is a schematic sectional view of a conventional organic EL display using the above-mentioned organic EL element.
In the figure, 110 is a glass substrate on which thin film transistors 116 as switching elements are formed in a matrix, a pixel electrode 111 made of a transparent conductive material (for example, ITO) as an anode electrode film connected to the output side of the thin film transistor, and a P-type organic material. Hole transport layer 11 that is a thin film
2, light emitting layer 113, electron transport layer 11 which is an N-type organic thin film
4, a common electrode 115 (made of, for example, an aluminum film) as a cathode electrode film, and a back glass 117 facing the common electrode 115 are formed with a gap provided by a sealing means (not shown).

Here, each thin film transistor 11
By applying a voltage to each pixel electrode and applying a current by 6, a pixel electrode can emit light. Thin film transistors 11 arranged in a matrix
By controlling 6 by a peripheral circuit (not shown) to control the current for each pixel, the light emission amount of each pixel can be controlled, and an organic EL display can be obtained. In addition, the light emitting layer 1
The light emitting material corresponding to R / G / B is used for 13
A color organic EL display can be obtained by producing and driving corresponding to / G / B respectively.

[0008]

However, the conventional organic EL display has the following problems.

First, it is necessary to form a light emitting element such as an organic EL element on a glass substrate on which switching elements arranged in a matrix such as a thin film transistor are formed. Therefore, when a large number of panels are formed on one glass substrate, even if one or several panels become defective at the stage of forming switching elements and cannot be used, the subsequent formation of light emitting elements is This is performed on the entire surface of the glass substrate, and the light emitting element is formed even on the defective panel, which causes a problem of low manufacturing efficiency.

Next, due to the limitation in forming the light emitting element such as the organic EL element described above, in the conventional organic EL display, light is emitted toward the glass substrate 110 on which the switching element and the drive wiring of the switching element are formed. I need to take it out. Therefore, since the switching element portion formed on the glass substrate and the drive wiring portion of the switching element block light, there is a problem that the effective light emitting area is limited and reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device and a method of manufacturing the same for improving the manufacturing efficiency and expanding the light emitting area of the display, in order to solve the above problems.

[0012]

In order to achieve the above object, the display device of the present invention and the manufacturing method thereof have the measures described in claims 1 to 12.

[0013] Specifically, the means taken by the invention of claim 1 is a display device for supplying electric power to a light emitting element by matrix driving to display an image, wherein a common transparent electrode and light emission on the common transparent electrode are provided. A first substrate on which elements are formed,
A second substrate on which a matrix-driving switching element and a driving wiring and a pixel electrode connected to each switching element are formed, and the pixel electrode and the light-emitting element are electrically connected and overlapped with each other. is there.

According to a second aspect of the present invention, there is provided a display device for displaying an image by supplying power to a light emitting element by matrix driving, wherein a common transparent electrode and a light emitting element on the common transparent electrode are formed. A structure in which a first substrate and a second substrate on which matrix-driving switching elements and driving wirings and pixel electrodes connected to the respective switching elements are formed are stacked via an anisotropic conductive material. It is what

The means taken by the invention of claim 3 is claim 1
Alternatively, the light emitting element is an organic EL layer composed of a plurality of layers, and the common transparent electrode is an anode electrode of the organic EL layer.

The means taken by the invention of claim 4 is as follows:
Alternatively, in the configuration of claim 2, the first substrate is a flexible substrate.
This is to add a structure that is a film.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a display device, which comprises forming a common transparent electrode on at least a surface of a first substrate, and forming a light emitting element on the common transparent electrode. A step of forming a matrix-driven switching element and a drive wiring on the surface of the second substrate, a step of forming a pixel electrode connected to the output side of the switching element, and a conductive layer on the surface of the pixel electrode. And a step of forming a material, and stacking the first substrate surface and the second substrate surface so as to face each other and electrically connecting the light emitting element and the pixel electrode by the conductive material. is there.

According to a sixth aspect of the present invention, there is provided a method for manufacturing a display device, which comprises forming a common transparent electrode on at least a surface of a first substrate, and forming a light emitting element on the common transparent electrode. A step of forming a matrix-driving switching element and a driving wiring on the surface of the second substrate, a step of forming a pixel electrode connected to the output side of the switching element, and a step other than the pixel electrode region. A step of forming a shrinkable adhesive in the area of, and the surface of the first substrate and the surface of the second substrate are opposed to each other and overlapped by the shrinkable adhesive, and then the shrinkable adhesive is cured and shrunk. Thus, the light emitting element and the pixel electrode are electrically connected.

According to a seventh aspect of the present invention, there is provided a method for manufacturing a display device, which comprises at least a step of forming a common transparent electrode on the surface of the first substrate, and forming a light emitting element on the common transparent electrode. The step of forming a matrix driving switching element and a driving wiring on the second substrate surface, the step of forming a pixel electrode connected to the output side of the switching element, and the first substrate surface. The second substrate surface is made to face each other, and an anisotropic conductive material is sandwiched between the second substrate surfaces, and the second substrate surfaces are overlapped with each other to electrically connect the light emitting element and the pixel electrode.

According to a eighth aspect of the present invention, there is provided a method for manufacturing a display device, which comprises at least a step of forming a common transparent electrode on the surface of the first substrate, and forming a light emitting element on the common transparent electrode. A step of forming a matrix-driven switching element and a drive wiring on the surface of the second substrate, a step of forming a pixel electrode connected to the output side of the switching element, and a conductive layer on the surface of the pixel electrode. A step of forming a material, a step of superposing the first substrate surface and the second substrate surface so as to face each other, and electrically connecting the light emitting element and the pixel electrode by the conductive material; and the second substrate It is configured to include a step of removing.

According to a ninth aspect of the present invention, there is provided a method for manufacturing a display device, which comprises at least a step of forming a common transparent electrode on the surface of the first substrate, and forming a light emitting element on the common transparent electrode. A step of forming a matrix-driving switching element and a driving wiring on the surface of the second substrate, a step of forming a pixel electrode connected to the output side of the switching element, and a step other than the pixel electrode region. A step of forming a shrinkable adhesive in the area of, and the surface of the first substrate and the surface of the second substrate are opposed to each other and overlapped by the shrinkable adhesive, and then the shrinkable adhesive is cured and shrunk. As a result, the light emitting element and the pixel electrode are electrically connected, and the second substrate is removed.

According to a tenth aspect of the present invention, there is provided a method for manufacturing a display device, which comprises forming a common transparent electrode on at least a surface of a first substrate, and forming a light emitting element on the common transparent electrode. The step of forming a matrix driving switching element and a driving wiring on the second substrate surface, the step of forming a pixel electrode connected to the output side of the switching element, and the first substrate surface. A step of electrically connecting the light emitting element and the pixel electrode by stacking the second substrate surfaces so as to face each other with an anisotropic conductive material sandwiched therebetween; and a step of removing the second substrate. To do.

According to an eleventh aspect of the present invention, in the structure according to any one of the fifth to tenth aspects, the light emitting element is an organic EL layer composed of a plurality of layers, and the common transparent electrode is an organic EL layer. The structure which becomes the anode electrode of the layer is added.

According to a twelfth aspect of the present invention, means for adding a configuration in which the first substrate is a flexible film to the configuration according to any one of the fifth to tenth aspects.

The above-described display device and manufacturing method thereof have the following effects.

The pixel electrode connected to the matrix-driven switching element and the light emitting element are electrically connected to each other to form a structure in which the voltage (or current) supplied by the switching element passes through the pixel electrode. Is supplied to the light emitting element. A self-luminous display is configured by controlling the driving (ON / OFF) of each switching element and the signal (voltage or current).

Here, since the light emitting element is formed on the first substrate, the emitted light is extracted to the first substrate side as in the conventional organic EL element described above. Further, since the switching element and the like are not formed on the first substrate, the switching element and the wiring region for driving the switching element do not affect the light emitting area even when the conventional manufacturing method of the organic EL element or the like is used. It is possible to increase the light emitting area.

Further, the formation of the light emitting element on the first substrate and the formation of the switching element and the like on the second substrate can be carried out independently, and the other substrate is formed on each of the defective substrates. Since sticking can be avoided, even when a large number of panels are manufactured on one substrate, it is not necessary to stick the first substrate on which the light emitting layer is formed to the defective panel portion, which improves manufacturing efficiency. It is possible to improve.

Further, in the invention of claim 5, since the area of the pixel electrode on which the conductive material is formed is in contact with the light emitting element by connecting with the conductive material on the surface of the pixel electrode, the area on which the conductive material is formed emits light. It can be a region.

In the sixth aspect of the present invention, by overlapping the substrates with the shrinkable adhesive, the pixel electrode and the light emitting element can be kept in a pressed state, and the electrical connection can be further stabilized.

Further, in the invention of claim 7, by connecting the pixel electrode and the light emitting element through the anisotropic conductive material, in addition to the above-described action, the substrate can be simply bonded. Good connection can be realized without short-circuiting the pixel electrodes.

Further, in the inventions of claims 8 to 10, by removing the second substrate, the weight of the display device can be reduced.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION A display device and a method for manufacturing the same according to embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view for explaining the display device according to the embodiment. In FIG. 1, 13 is a flexible substrate as a first substrate, an organic EL element as a light emitting element is formed on the surface (lower side in the figure) of the flexible substrate 13, and 14 as a common transparent electrode is An anode electrode formed of a transparent material (for example, an ITO film), 15 is a hole transport layer, 16-1, 16-2 and 16-3 are light emitting layers, and 17 is an electron transport layer. Reference numeral 10 denotes a glass substrate serving as a second substrate. On the surface (upper side in the drawing) of the glass substrate 10, switching elements 11, pixel electrodes 12, and switching element driving elements arranged in a matrix (not shown) are arranged. Wiring is formed.

The flexible substrate 13 and the glass substrate 10 are electrically connected by the electron transport layer 17 and the pixel electrode 12, and the pixel electrode 12 also serves as the cathode electrode of the organic EL element.

By selecting an arbitrary switching element 11 arranged in a matrix by a driving circuit (not shown) and supplying a voltage (or current) to the pixel electrode 12, light emission is generated in the light emitting layer 16 of the organic EL element. Pixel electrode 12
By using as a reflective material, the emitted light can be extracted upward.

Here, a two-dimensional image can be formed by sequentially controlling the switching element to be selected and the voltage (or current) to be supplied by the drive circuit, and the organic E
An L display is obtained.

Further, the light emitting layers 16-1, 16-2, 16-
A color organic EL display can be obtained by forming 3 with a material corresponding to R / G / B.

Here, in the organic EL display shown in FIG. 1, a manufacturing method similar to that of a conventional organic EL element can be used as a light emitting element, and a switching element or a wiring region for driving the switching element emits light. It is possible to increase the light emitting area without affecting the area. Also, the first
Since the second substrate and the second substrate are superposed on each other, it is possible to avoid sticking the other substrate to the defective substrate in the manufacturing process, so that a large number of panels are formed on one substrate. Even in the case of manufacturing, it is not necessary to attach the first substrate on which the light emitting layer is formed to the defective panel portion, so that the manufacturing efficiency can be improved.

In the first embodiment, the pixel electrode 1
Although 2 and the electron transport layer 17 are directly connected to each other, this is the same even if they are connected to each other via a conductive adhesive material.

(Second Embodiment) FIG. 2 shows a second embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view for explaining the display device according to the embodiment. 2 is almost the same as FIG. 1, and is a flexible substrate 1 on which an organic EL element is formed as a light emitting element.
3 and the glass substrate 10 as the second substrate are connected with the anisotropic conductive material 18 sandwiched between the electron transport layer 17 and the pixel electrode 12. Since the anisotropic conductive material 18 allows a current to flow only in the thickness direction (vertical direction in the drawing), the pixel electrode 12
Each electron transport layer 17 and the pixel electrode 12 can be easily electrically connected without short-circuiting between them.

Other effects are similar to those of the above-described first embodiment.

Although the glass substrate is used as the second substrate in the first to second embodiments, the same applies to an inorganic or organic (resin) film. It need not be transparent.

Although the organic EL element is used as the light emitting element in the above description, it can be easily inferred that the same effect can be obtained with other light emitting elements.

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention.
FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the embodiment. First, as shown in FIG. 3A, an anode electrode 14 formed of a transparent material (for example, an ITO film) as a common transparent electrode is formed on the surface (lower surface in the drawing) of a flexible substrate 13 as a first substrate. To do.

Next, as shown in FIG. 3B, the hole transport layer 15 is formed on the surface of the anode electrode 14, and the surface of the hole transport layer 15 is divided into matrix-like pixels R / R.
Light-emitting layer 16-which is a light-emitting material having a wavelength corresponding to G / B
1, 16-2, 16-3 are formed. Then, the light emitting layer 1
Electron transport layer 1 so as to cover 6-1, 16-2, 16-3
Form 7.

Next, as shown in FIG. 3C, a switching element 11 composed of thin film transistors and the like arranged in a matrix on a glass substrate 10 as a second substrate.
A wiring for driving a switching element (not shown) and an insulating film covering the switching element and the wiring are formed.

Next, as shown in FIG. 3D, the pixel electrode 12 (for example, made of an aluminum material) connected to the output side of the switching element 11 and the conductive adhesive layer 19 on the pixel electrode are formed.

Next, as shown in FIG. 3E, the flexible substrate 13 and the glass substrate 10 are superposed on each other, and the pixel electrode 12 and the electron transport layer 17 are electrically connected by the conductive adhesive layer 19. As a result, the conductive adhesive layer 19 becomes a cathode electrode.

A color organic EL display is obtained through the above steps.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment of the present invention.
FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the embodiment. The fourth embodiment is almost the same as the above-described third embodiment. First, as shown in FIG. 4A, a common transparent film is formed on the surface (lower surface in the figure) of the flexible substrate 13 as the first substrate. The anode electrode 14 formed of a transparent material (for example, ITO film) as an electrode is formed.

Next, as shown in FIG. 4 (b), a hole transport layer 15 is formed on the surface of the anode electrode 14, and the surface of the hole transport layer 15 is divided into matrix-like pixels R / R.
Light-emitting layer 16-which is a light-emitting material having a wavelength corresponding to G / B
1, 16-2, 16-3 are formed. Then, the light emitting layer 1
Electron transport layer 1 so as to cover 6-1, 16-2, 16-3
Form 7.

Next, as shown in FIG. 4C, a switching element 11 composed of thin film transistors and the like arranged in a matrix on a glass substrate 10 as a second substrate.
A wiring for driving a switching element (not shown) and an insulating film covering the switching element and the wiring are formed.

Next, as shown in FIG. 4D, a pixel electrode 12 (for example, made of an aluminum material) connected to the output side of the switching element 11 and an arbitrary region other than the pixel electrode 12 (for example, pixels are separated from each other). The shrinkable adhesive 20 is formed in the area (for

Next, as shown in FIG. 4E, the flexible substrate 13 and the glass substrate 10 are coated with the shrinkable adhesive 20.
Overlap. Thereafter, the shrinkable adhesive 20 is cured and shrunk to more securely electrically connect the pixel electrode 12 and the electron transport layer 17. As a result, the pixel electrode 12 becomes a cathode electrode.

A color organic EL display is obtained by the above steps.

(Fifth Embodiment) FIG. 5 shows the fifth embodiment of the present invention.
FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the embodiment. The fifth embodiment is also almost the same as the above-described third embodiment. First, as shown in FIG. 5A, a common transparent film is formed on the surface (lower surface in the figure) of the flexible substrate 13 as the first substrate. The anode electrode 14 formed of a transparent material (for example, ITO film) as an electrode is formed.

Next, as shown in FIG. 5B, the hole transport layer 15 is formed on the surface of the anode electrode 14, and the surface of the hole transport layer 15 is divided into matrix-like pixels R / R.
Light-emitting layer 16-which is a light-emitting material having a wavelength corresponding to G / B
1, 16-2, 16-3 are formed. Then, the light emitting layer 1
Electron transport layer 1 so as to cover 6-1, 16-2, 16-3
Form 7.

Next, as shown in FIG. 5C, a switching element 11 composed of thin film transistors and the like arranged in a matrix on a glass substrate 10 as a second substrate.
A wiring for driving a switching element (not shown) and an insulating film covering the switching element and the wiring are formed.

Next, as shown in FIG. 5D, the pixel electrode 12 (for example, made of an aluminum material) connected to the output side of the switching element 11 is formed.

Next, as shown in FIG. 5E, the flexible substrate 13 and the glass substrate 10 are superposed with the anisotropic conductive material 18 sandwiched therebetween. By the anisotropic conductive material 18,
The pixel electrode 12 is electrically connected to the electron transport layer 17 in that region. As a result, the anisotropic conductive material 18 becomes the cathode electrode.

A color organic EL display is obtained through the above steps.

(Sixth Embodiment) FIG. 6 shows a sixth embodiment of the present invention.
FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the embodiment. The sixth embodiment is almost the same as the above-described third embodiment. First, as shown in FIG. 6A, a common transparent film is formed on the surface (lower surface in the figure) of the flexible substrate 13 as the first substrate. The anode electrode 14 formed of a transparent material (for example, ITO film) as an electrode is formed.

Next, as shown in FIG. 6B, the hole transport layer 15 is formed on the surface of the anode electrode 14, and the surface of the hole transport layer 15 is divided into matrix-like pixels by R /
Light-emitting layer 16-which is a light-emitting material having a wavelength corresponding to G / B
1, 16-2, 16-3 are formed. Then, the light emitting layer 1
Electron transport layer 1 so as to cover 6-1, 16-2, 16-3
Form 7.

Next, as shown in FIG. 6C, a peeling layer 21 and a protective film 22 are formed on the glass substrate 10 as the second substrate.
After forming, the switching element 11 formed of thin film transistors and the like arranged in a matrix, a wiring for driving the switching element (not shown), and an insulating film covering the switching element and the wiring are formed.

Next, as shown in FIG. 6D, the pixel electrode 12 (for example, made of an aluminum material) connected to the output side of the switching element 11 and the conductive adhesive layer 19 on the pixel electrode are formed.

Next, as shown in FIG. 6E, the flexible substrate 13 and the glass substrate 10 are superposed, and the pixel electrode 12 and the electron transport layer 17 are electrically connected by the conductive adhesive layer 19. As a result, the conductive adhesive layer 19 becomes a cathode electrode.

Next, as shown in FIG. 6 (f), the release layer 2
The glass substrate 10 is removed by etching 1.

A color organic EL display is obtained by the above steps.

(Seventh Embodiment) FIG. 7 shows a seventh embodiment of the present invention.
FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the embodiment. The seventh embodiment is almost the same as the above-described fourth embodiment. First, as shown in FIG. 7A, a common transparent film is formed on the surface (lower surface in the figure) of the flexible substrate 13 as the first substrate. The anode electrode 14 formed of a transparent material (for example, ITO film) as an electrode is formed.

Next, as shown in FIG. 7B, the hole transport layer 15 is formed on the surface of the anode electrode 14, and the surface of the hole transport layer 15 is divided into matrix-like pixels R / R.
Light-emitting layer 16-which is a light-emitting material having a wavelength corresponding to G / B
1, 16-2, 16-3 are formed. Then, the light emitting layer 1
Electron transport layer 1 so as to cover 6-1, 16-2, 16-3
Form 7.

Next, as shown in FIG. 7C, a peeling layer 21 and a protective film 22 are formed on the glass substrate 10 as the second substrate.
After forming, the switching element 11 formed of thin film transistors and the like arranged in a matrix, a wiring for driving the switching element (not shown), and an insulating film covering the switching element and the wiring are formed.

Next, as shown in FIG. 7D, a pixel electrode 12 (for example, made of an aluminum material) connected to the output side of the switching element 11 and an arbitrary region other than the pixel electrode 12 (for example, pixels are separated from each other). The shrinkable adhesive 20 is formed in the area (for

Next, as shown in FIG. 7E, the flexible substrate 13 and the glass substrate 10 are coated with the shrinkable adhesive 20.
Overlap. Thereafter, the shrinkable adhesive 20 is cured and shrunk to more securely electrically connect the pixel electrode 12 and the electron transport layer 17. As a result, the pixel electrode 12 becomes a cathode electrode.

Next, as shown in FIG. 7 (f), the release layer 2
The glass substrate 10 is removed by etching 1.

A color organic EL display is obtained through the above steps.

(Eighth Embodiment) FIG. 8 shows an eighth embodiment of the present invention.
FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the embodiment. The eighth embodiment is almost the same as the above-described fifth embodiment. First, as shown in FIG. 8A, a common transparent film is formed on the surface (lower surface in the figure) of the flexible substrate 13 as the first substrate. The anode electrode 14 formed of a transparent material (for example, ITO film) as an electrode is formed.

Next, as shown in FIG. 8B, the hole transport layer 15 is formed on the surface of the anode electrode 14, and the surface of the hole transport layer 15 is divided into matrix-like pixels by R /
Light-emitting layer 16-which is a light-emitting material having a wavelength corresponding to G / B
1, 16-2, 16-3 are formed. Then, the light emitting layer 1
Electron transport layer 1 so as to cover 6-1, 16-2, 16-3
Form 7.

Next, as shown in FIG. 8C, the peeling layer 21 and the protective film 22 are formed on the glass substrate 10 as the second substrate.
After forming, the switching element 11 formed of thin film transistors and the like arranged in a matrix, a wiring for driving the switching element (not shown), and an insulating film covering the switching element and the wiring are formed.

Next, as shown in FIG. 8D, the pixel electrode 12 (for example, made of an aluminum material) connected to the output side of the switching element 11 is formed.

Next, as shown in FIG. 8E, the flexible substrate 13 and the glass substrate 10 are superposed with the anisotropic conductive material 18 sandwiched therebetween. By the anisotropic conductive material 18,
The pixel electrode 12 is electrically connected to the electron transport layer 17 in that region. As a result, the anisotropic conductive material 18 becomes the cathode electrode.

Next, as shown in FIG. 8F, the release layer 2
The glass substrate 10 is removed by etching 1.

A color organic EL display is obtained through the above steps.

In the third to eighth embodiments, the arbitrary switching elements 11 arranged in a matrix are selected by the drive circuit (not shown), and the pixel electrode 1 is selected.
By supplying an arbitrary voltage (or current) to 2, the light emitting layer 16 of the organic EL element emits light. By using the pixel electrode 12 or the conductive adhesive layer 19 as a reflective material, the light generated in the light emitting layer can be extracted upward.

Therefore, according to the manufacturing method of the display device in the third to eighth embodiments, the first substrate (flexible substrate) on which the light emitting elements are formed is divided into panels, and then the second substrate ( Undivided glass substrate)
By sticking to the panel, it is not necessary to use the first substrate (flexible substrate) on which the light emitting element is formed for a panel in which a defect (element or wiring formation defect) has occurred in the process of forming the switching element, and the manufacturing efficiency is improved. Can be improved.

In the third to eighth embodiments, the light-emitting layer is divided into pixels to correspond to R / G / B, but this is formed in the case of monochrome display. A light emitting layer may be formed on the entire surface.

Further, in the sixth to eighth embodiments, the glass substrate 10 is removed by removing the peeling layer 21, but the glass substrate 10 is removed by etching or polishing. The same applies to thinning.

Further, in the first to eighth embodiments, the flexible substrate is explained as the first substrate, but this is a resin substrate or a resin film, which is lighter and higher than a glass substrate or the like. It can be mobilized, but it is easy to understand that using a hard transparent substrate such as a glass substrate does not cause any problem, and if it is almost transparent, the same effect can be obtained by using other materials. . Also, the second
I explained using a glass substrate as the substrate of, but this is
Any substrate can be used as long as it can withstand the formation of switching elements, and an opaque substrate can be used.

[0089]

As described above, according to the display device and the method of manufacturing the same of the present invention, it is possible to improve the manufacturing efficiency and increase the effective light emitting area particularly in the display device having the self-luminous element.

[Brief description of drawings]

FIG. 1 is a schematic sectional view for explaining a display device according to a first embodiment of the present invention.

FIG. 2 is a schematic sectional view for explaining a display device according to a second embodiment of the present invention.

FIG. 3 is a schematic process cross-sectional view for explaining the manufacturing method of the display device according to the third embodiment of the present invention.

FIG. 4 is a schematic process cross-sectional view for explaining the manufacturing method of the display device according to the fourth embodiment of the present invention.

FIG. 5 is a schematic process cross-sectional view for explaining the manufacturing method for the display device according to the fifth embodiment of the present invention.

FIG. 6 is a schematic process cross-sectional view for explaining the manufacturing method of the display device according to the sixth embodiment of the present invention.

FIG. 7 is a schematic process cross-sectional view for explaining the manufacturing method of the display device according to the seventh embodiment of the present invention.

FIG. 8 is a schematic process cross-sectional view for explaining the manufacturing method of the display device according to the eighth embodiment of the present invention.

FIG. 9 is a schematic configuration diagram of an organic EL element as a light emitting element.

FIG. 10 is a schematic sectional view of a conventional organic EL display.

[Explanation of symbols]

10 glass substrates 11 Switching element 12 pixel electrodes 13 Flexible substrate 14 Anode electrode 15 Hole transport layer 16-1, 16-2, 16-3 Light emitting layer 17 Electron transport layer 18 Anisotropically conductive material 19 Conductive adhesive layer 20 Shrinkable adhesive 21 Release layer 22 Protective film 100 glass substrates 101 Anode electrode film 102 hole transport layer 103 light emitting layer 104 electron transport layer 105 cathode electrode film 110 glass substrate 111 pixel electrode 112 Hole Transport Layer 113 light emitting layer 114 electron transport layer 115 common electrode 116 thin film transistor 117 Back glass

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H05B 33/14 H05B 33/14 AF term (reference) 3K007 AB18 BA07 CA06 CB01 DB03 GA00 5C094 AA10 AA15 AA43 BA03 BA12 BA27 CA19 CA24 CA25 DA12 DA13 DB01 DB04 EA04 EA05 FA02 FB01 FB20 GB10 5G435 AA03 AA04 AA17 BB05 CC09 CC12 HH01 HH20 KK05

Claims (12)

[Claims] 1. A display device for displaying an image by supplying electric power to a light emitting element by matrix driving, comprising a common transparent electrode and a light emitting element on the common transparent electrode.
And a second substrate on which a matrix driving switching element and a driving wiring and pixel electrodes connected to the respective switching elements are formed, and the pixel electrode and the light emitting element are electrically connected to each other and stacked. A display device characterized by: 2. A display device for displaying an image by supplying electric power to a light emitting element by matrix driving, wherein a first transparent electrode and a light emitting element on the common transparent electrode are formed.
And the second substrate on which the matrix-driving switching element and the driving wiring and the pixel electrode connected to each switching element are formed, are superposed with an anisotropic conductive material interposed therebetween. A display device characterized by. 3. The display according to claim 1, wherein the light emitting element is an organic EL layer including a plurality of layers, and the common transparent electrode is an anode electrode of the organic EL layer. apparatus. 4. The display device according to claim 1, wherein the first substrate is a flexible film. 5. At least a step of forming a common transparent electrode on the surface of the first substrate, a step of forming a light emitting element on the common transparent electrode, and a switching element for driving a matrix and a driving element on the surface of the second substrate. A step of forming wiring, a step of forming a pixel electrode connected to the output side of the switching element, a step of forming a conductive material on the surface of the pixel electrode, the first substrate surface and the second A method of manufacturing a display device, comprising the steps of stacking the substrate surfaces so as to face each other and electrically connecting the light emitting element and the pixel electrode with the conductive material. 6. At least a step of forming a common transparent electrode on the surface of the first substrate, a step of forming a light-emitting element on the common transparent electrode, and a matrix-driven switching element and a driving element on the surface of the second substrate. Forming a wiring, forming a pixel electrode connected to the output side of the switching element, forming a shrinkable adhesive in a desired region other than the pixel electrode region, and the first substrate A display device comprising a step of electrically connecting the light emitting element and the pixel electrode by causing the surface and the surface of the second substrate to face each other and overlapping them with the shrinkable adhesive, and then curing and shrinking the shrinkable adhesive. Manufacturing method. 7. At least a step of forming a common transparent electrode on the surface of the first substrate, a step of forming a light emitting element on the common transparent electrode, and a switching element and a driving element for driving a matrix on the surface of the second substrate. A step of forming wiring, a step of forming a pixel electrode connected to the output side of the switching element, and a surface of the first substrate and a surface of the second substrate facing each other, and sandwiching an anisotropic conductive material. A method for manufacturing a display device, which comprises the step of electrically connecting the light emitting element and the pixel electrode by overlapping with each other. 8. At least a step of forming a common transparent electrode on the surface of the first substrate, a step of forming a light emitting element on the common transparent electrode, and a switching element and a driving element for driving a matrix on the surface of the second substrate. A step of forming wiring, a step of forming a pixel electrode connected to the output side of the switching element, a step of forming a conductive material on the surface of the pixel electrode, the first substrate surface and the second A method of manufacturing a display device comprising: a step of superposing the surface of a substrate so as to face each other and electrically connecting the light emitting element and the pixel electrode with the conductive material; and a step of removing the second substrate. 9. At least a step of forming a common transparent electrode on the surface of the first substrate, a step of forming a light emitting element on the common transparent electrode, and a switching element and a driving element for driving a matrix on the surface of the second substrate. Forming a wiring, forming a pixel electrode connected to the output side of the switching element, forming a shrinkable adhesive in a desired region other than the pixel electrode region, and the first substrate A step of electrically connecting the light emitting element and the pixel electrode by causing the surface and the surface of the second substrate to face each other and overlapping them with the shrinkable adhesive, and then curing and shrinking the shrinkable adhesive; 2. A method for manufacturing a display device, which comprises the step of removing the substrate 2. 10. At least a step of forming a common transparent electrode on the surface of the first substrate, a step of forming a light emitting element on the common transparent electrode, and a matrix-driven switching element and a driving element on the surface of the second substrate. A step of forming wiring, a step of forming a pixel electrode connected to the output side of the switching element, and a surface of the first substrate and a surface of the second substrate facing each other, and sandwiching an anisotropic conductive material. And a step of electrically connecting the light emitting element and the pixel electrode by overlapping with each other, and a step of removing the second substrate. 11. A light emitting device is an organic EL device comprising a plurality of layers.
11. The method for manufacturing a display device according to claim 5, wherein the common transparent electrode is a layer, and the common transparent electrode serves as an anode electrode of the organic EL layer. 12. The method for manufacturing a display device according to claim 5, wherein the first substrate is a flexible film.