JP2003332049A - Organic EL display - Google Patents

Abstract

(57) [Problem] To provide an organic EL display device which can be reduced in size and can reduce the number of connection steps with an external control device. An organic EL display device includes a substrate, a color filter, an organic EL element, and a cover for covering the organic EL element. The organic EL element 14 includes a data electrode 16, an organic EL layer 17, and a scanning electrode 18. A first data electrode driver 20, a second data electrode driver, and a scan electrode driver are provided inside the cover 15, and each driver is connected to a data electrode 16, a scan electrode 18 via wiring formed on the inner surface of the cover 15. And connection pad terminals 23
Etc. are connected. Each connection pad terminal 23 etc. is covered
It is arranged at a position corresponding to one side of fifteen. The cover 15 is fixed to the substrate 12 via the ACF.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an organic EL device on a substrate.
The present invention relates to an organic EL display device in which a first electrode and a second electrode are stacked with a layer sandwiched therebetween to form an organic EL element, and the organic EL element is sealed with a cover.

[0002]

2. Description of the Related Art Conventionally, in an organic electroluminescence (hereinafter simply referred to as "organic EL") display device, a substrate is provided with a driving IC (driving circuit element) for driving an image display section formed of an organic EL element formed on the substrate. It is implemented in.
The driving IC is an anisotropic conductive sheet (ACF: anisotropi).
COG (Chip On Glas) using c conductive film
s) method or FOG (Film On Glass) method.

The organic EL element has a first electrode (anode) and a second electrode.
An organic EL layer is formed between the electrode (cathode). Since organic EL materials have high reactivity with oxygen and moisture, unless they are used in a state in which they are shielded from the outside air, chemical degradation occurs due to oxygen and moisture in the atmosphere, and dark spots and dark areas called non-luminous regions expand. There is a problem.
Therefore, in order to shield the organic EL layer from the outside air, there is a configuration in which a cover made of stainless steel or glass is provided on the substrate via an adhesive, and an adsorbent is housed and sealed in the cover.

The organic EL display device uses a self-luminous organic EL element, is lightweight and thin, and has many merits. Utilizing these merits, it is applied to a small panel or a portable device. However, the drive circuit that drives the organic EL element
If it is mounted on the substrate outside the cover of the organic EL element, it becomes difficult to reduce the size of the display device. An organic EL element module that solves this inconvenience is disclosed in Japanese Patent Laid-Open No. 2000-4.
It is proposed in Japanese Patent No. 0585. This module
An internal sealing body and an external sealing body are provided in order to seal the organic EL structure (organic EL element) formed on the substrate, and the internal sealing body, the external sealing body, and the substrate between them are provided. A circuit for controlling and driving the organic EL structure is formed in any of the above.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the organic EL element module disclosed in Japanese Patent No. 0585, since the circuit for controlling and driving the organic EL structure is arranged in the projection surface of the external sealing body, the circuit on the substrate is outside the projection surface of the external sealing body. It is possible to reduce the size of the organic EL element module as compared with the case where the organic EL element module is mounted on. However, when driving the organic EL element, a drive circuit for controlling the power supply to the electrodes in the X direction and the Y direction is required, and special consideration is given to the connection between each drive circuit and an external control device. Not not. If an input section for the drive circuit in the X direction and an input section for the drive circuit in the Y direction are simply provided on the corresponding sides of the external sealing body, the number of connecting steps with the control device increases and the wiring is complicated. become.

The present invention has been made in view of the conventional problems described above, and an object thereof is to provide an organic EL display device which can be downsized and which can reduce the number of connection steps with an external control device. It is in.

[0007]

In order to achieve the above object, an invention according to claim 1 is an organic EL device in which a first electrode and a second electrode are laminated on a substrate with an organic EL layer sandwiched therebetween. Is formed, and the organic EL element is sealed with a cover. Then, a plurality of driving circuit elements for driving the organic EL element are provided on the outer surface or the inner surface of the cover, and the other end of the wiring, one end of which is connected to each of the driving circuit elements, is connected to one side of the cover. It was placed in the corresponding position.

In this invention, the driving circuit element is an organic EL device.
Since it is provided on the outer surface or inner surface of the element cover, the organic EL display device can be downsized as compared with the case where the driving circuit element is mounted on the substrate outside the cover. Further, since the other end of the wiring connected to each driving circuit element is arranged at a position corresponding to one side of the cover, the number of connecting steps with an external control device can be reduced.

According to a second aspect of the present invention, in the first aspect of the invention, the other end of the wiring is arranged so as to be orthogonal to the outer edge of the cover on the substrate in correspondence with the other end of the wiring. It is formed in parallel with the formed connection pad terminal.
When the wiring, one end of which is connected to the driving circuit element provided on the cover, is linearly arranged up to the outer edge of the cover, the wiring is not orthogonal to the outer edge but is oblique. When the ends of the wiring are not parallel to the connection pad terminals formed so as to be orthogonal to the outer edge, it is difficult to join the ends with high accuracy. However, if the end portion of the wiring is parallel to the connection pad terminal, some displacement of the cover in the longitudinal direction of the connection pad terminal is allowed.

According to a third aspect of the present invention, in the first or second aspect of the invention, the organic EL element is
The organic EL is driven by a passive drive method.
A display section composed of elements is divided into a plurality of pieces in the extending direction of the data electrodes. According to the present invention, since the display unit including the organic EL element is divided, even if the number of driving circuit elements is increased, the number of connecting steps with the external control device can be made almost the same as when the number of driving circuit elements is small. .

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the cover is formed of a transparent material, and a peripheral edge of the cover is joined to the substrate. Positioning marks are provided on the portion and a position facing the peripheral portion of the substrate.

In the present invention, the cover is transparent, and the alignment mark formed on the peripheral portion of the cover that is joined to the substrate and the alignment mark formed on the peripheral portion of the substrate are used. This makes it easier to adhere the cover to the substrate at a predetermined position.

According to a fifth aspect of the invention, in the invention according to any one of the first to fourth aspects, the driving circuit elements are arranged on the inner surface of the cover. According to the present invention, since each drive circuit element is disposed on the inner surface of the cover, it is necessary to provide a protective member for each drive circuit element, unlike the configuration in which each drive circuit element is disposed outside the cover. There is no.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in a passive matrix drive type organic EL display device will be described below with reference to FIGS. FIG. 1 is a schematic cross-sectional view of the organic EL display device cut along a plane parallel to the scanning electrodes. In this embodiment, the upper side in FIG. 1 is the upper side of the organic EL display device.

As shown in FIG. 1, the organic EL display device 11
Is a substrate 12, a color filter 13 formed on the substrate 12, and an organic E formed on the color filter 13.
L element 14 and color filter 13 of organic EL element 14
And a cover 15 that covers a portion other than the surface facing the. In this embodiment, the substrate 12 is made of glass, and the emission direction of light emitted from the organic EL element 14 is on the substrate 12 side. In the following description, the color filter 13 may be collectively referred to as the substrate 12. Cover 15
An inert gas such as nitrogen gas is enclosed in the space surrounded by the substrate 12. Further, a hygroscopic agent (not shown) is housed in the space.

The organic EL element 14 comprises a data electrode 16 as a first electrode, an organic EL layer 17, and a scanning electrode 18 as a second electrode. In this embodiment, the data electrode 16 constitutes an anode and the scanning electrode 18 constitutes a cathode. The data electrodes 16 are formed on the surface of the color filter 13 in a plurality of parallel stripes, and are formed so as to extend in the direction perpendicular to the paper surface in FIG. The data electrode 16 is formed transparent, and is I in this embodiment.
It is made of TO (indium tin oxide).

The organic EL layer 17 is formed in a plurality of parallel stripes extending in a direction orthogonal to the data electrodes 16 in a state of being separated by insulating partition walls (not shown).
The scanning electrode 18 is a stripe-shaped organic EL layer 1
7 is stacked on top of each other and is formed so as to be orthogonal to the data electrodes 16. Pixels forming the organic EL element 14 are arranged in a matrix on the substrate 12 (color filter 13) at the intersection of the data electrode 16 and the scan electrode 18. The scan electrode 18 is made of metal, for example, aluminum.

The organic EL layer 17 has, for example, a well-known structure and is composed of three layers of a hole injection layer, a light emitting layer and an electron injection layer in order from the data electrode 16 side. The organic EL layer 17 is composed of a white light emitting layer.

FIG. 2 is a schematic plan view with the cover 15 removed, and FIG. 3 is a schematic plan view with the cover 15 attached. Display unit 19 composed of organic EL element 14
Are divided into a plurality in the extending direction of the data electrode 16. In this embodiment, in FIG. 2, it is divided into a first split display section 19A on the left side and a second split display section 19B on the right side. As shown in FIG. 2, the data electrode 16 forming one data line of the display unit 19 is formed.
Are arranged independently of each other corresponding to the divided display portions 19A and 19B. The scanning electrodes 18 are divided into a left group corresponding to the first split display section 19A and a right group corresponding to the second split display section 19B. In addition,
1 and 2, the number of the data electrodes 16 and the scan electrodes 18 is illustrated to be significantly smaller than the actual number for easy understanding, and the number of the data electrodes 16 is different between FIG. 1 and FIG. Is depicted in.

As shown in FIG. 3, the driving circuit element for driving the organic EL element 14, that is, the driving circuit element for driving the data electrode 16 and the scanning electrode 18 is disposed on the inner surface of the cover 15. Two first data electrode drivers 20 as driving circuit elements for driving the data electrodes 16 are provided at positions corresponding to the first split display portion 19A, and data electrodes are provided at positions corresponding to the second split display portion 19B. Second data electrode driver 21 as a driving circuit element for driving 16
2 are provided respectively.

A scan electrode driver 22 as a driving circuit element for driving the scan electrodes 18 is provided at a position corresponding to the boundary between the first split display portion 19A and the second split display portion 19B.
Individually provided. The scan electrode driver 22 includes a driver that drives the scan electrodes 18 of the first split display portion 19A,
A driver for driving the scan electrodes 18 of the second divided display portion 19B is integrated into one chip as one scan electrode driver IC.

As shown in FIG. 1, the concave portion 15a formed in the cover 15 has a slanted peripheral edge.
Data electrode driver 20, second data electrode driver 21
The scan electrode driver 22 is mounted on a flat portion near the center of the recess 15a. As a method of forming the concave portion 15a in the glass cover 15, there is a method of shaving a predetermined portion of a flat glass plate by sandblasting or etching. If the surface is rough only by sandblasting, the surface after sandblasting is etched or heated and melted to make it smooth.

As shown in FIGS. 2 and 3, the connection pad terminals 23 are provided on the substrate 12 in the vicinity of the first divided display portion 19A and the second divided display portion 19B at positions corresponding to one side of the cover 15. ~ 27 are formed. Connection pad terminal 2
3 to 27 are for electrically connecting the organic EL display device 11 and the display controller 28 (illustrated in FIG. 5) as a control device. Connection pad terminals 23-27
Are formed so as to be orthogonal to the outer edge of the cover 15.

As shown in FIG. 3, the first and second data electrode drivers 20 and 21 and the scan electrode driver 22 are connected to the wirings 29a to 33a and the wirings 29b to 33b formed on the inner surface of the cover 15. Is implemented as follows. The wirings 29a to 33a and the wirings 29b to 33b are IT
It is formed in an O pattern. Connection pad terminals 23-2
The other end of each of the wirings 29a to 33a connected to 7 is formed in parallel with the connection pad terminals 23 to 27. The first and second data electrode drivers 20 and 21 and the scan electrode driver 22 are mounted by the COG method using an ACF (anisotropic conductive sheet) not shown. Although each of the wirings 29a to 33a, 29b to 33b and the connection pad terminals 23 to 27 is illustrated as one in FIG. 3, it is actually composed of a plurality of wires. Also, FIG.
The wiring 29a formed on the inner surface of the cover 15
Etc. are not shown.

Each of the wirings 29a and 30a has one end connected to the first data electrode driver 20 and the other end connected to the connection pad terminals 23 and 24. Wiring 29b, 30
b, one end thereof is connected to the first data electrode driver 20, and the other end thereof is the data electrode 16 of the first split display portion 19A.
Is connected to the end of. Each of the wirings 31a and 32a has one end connected to the second data electrode driver 21 and the other end connected to the connection pad terminals 25 and 26. One end of each of the wirings 31b and 32b is connected to the second data electrode driver 21, and the other end is connected to an end of the data electrode 16 of the second split display section 19B. The wiring 33a is
One end is connected to the scan electrode driver 22, and the other end is connected to the connection pad terminal 27. The wiring 33b has one end connected to the scan electrode driver 22 and the other end connected to the scan electrode 18
Is connected to the end of.

The cover 15 has a peripheral edge portion 15b and the substrate 1.
ACF 34 (anisotropic conductive sheet) is interposed between the organic EL element 14 and the substrate 2, and the organic EL element 14 is sealed by the cover 15 in a state of being shielded from the outside air.
In this embodiment, as the ACF, one having conductive particles 34a (shown in FIGS. 4A and 4B) in a dispersed state in a thermosetting resin is used. Then, the ACF 34 is attached with the thermosetting resin in the B stage (semi-cured) state,
The resin is once softened by heat and pressure to be adhesively cured.

The cover 15 is made of a transparent material (glass in this embodiment), and is located at a peripheral edge portion 15b of the cover 15 joined to the substrate 12 and at a position facing the peripheral edge portion 15b of the substrate 12. Alignment marks 35 and 36 are provided.

FIG. 4 (a) shows A stuck on the substrate 12.
FIG. 4B is a schematic diagram showing a relationship between the CF 34 and the connection pad terminal 23 and the wiring 29a of the cover 15, and FIG. 4B is a schematic diagram showing a state in which the connection pad terminal 23 and the wiring 29a are connected.

When the cover 15 is attached to the substrate 12,
First, the thermosetting resin is used to form the B stage ACF 34 on the substrate 1.
2 is attached to a predetermined portion, that is, a portion to which the peripheral portion 15b of the cover 15 is attached. The portion to which the peripheral edge portion 15b is attached is a position including the outside of the portion shown by the chain line of the upper side and the left and right two sides of the substrate 12 in FIG.

Next, the cover 15 is attached to the mark 3 for alignment.
ACF on the substrate 12 so that 5 and 36 are overlapped
34 on the peripheral portion 15b of the wiring 29a-33a,
The portions corresponding to 29b to 33b are heated and pressed with a predetermined force. By this heating and pressurization, the ACF 34 causes the wirings 29a-3
3a and connection pad terminals 23 to 27, end portions of the data electrode 16 and the scan electrode 18, and the wiring 29.
The part sandwiched between b to 33b is crushed. Then, as shown in FIG. 4B, the conductive particles 34a forming the ACF 34 come into contact with each other. That is, the cover 15 includes the wirings 29a to 33a and 29b to 33.
b is in a state of being electrically connected to the corresponding data electrode 16, the scanning electrode 18 or the connection pad terminals 23 to 27 on the side of the substrate 12 and sealing the organic EL element 14 in a state of being shielded from the outside air. Since the mounting work of the cover 15 is performed in a nitrogen gas atmosphere, the nitrogen gas is sealed in the cover 15.

As shown in FIG. 5, the organic EL display device 11
Is an FO that uses ACF for the connection pad terminals 23 to 27.
The display controller 28 is connected via an FPC (flexible printed circuit board) 37 connected by the G method.

Next, the operation of the organic EL display device 11 configured as described above will be described. When the display controller 28 is turned on and an image is displayed on the display screen of the display unit 19, the data electrodes 16 are driven by the first and second data electrode drivers 20 and 21, and the scanning electrodes 18 are driven by the scanning electrode driver 22. Driven. Then, the scan electrode driver 22 is operated based on a command from the display controller 28, so that the scan electrode 1 of the first split display portion 19A.
8 groups and the scanning electrodes 18 group of the second divided display portion 19B,
For example, each scanning electrode 18 is simultaneously and sequentially selected and driven.

Further, each data electrode driver 20, 21 is operated based on a command from the display controller 28, so that at least one data electrode 16 of the first and second divided display portions 19A, 19B is driven. . Therefore, the scan electrodes 18 driven by the scan electrode driver 22
Then, the organic EL element 14 located at the intersection with the data electrode 16 driven by each of the data electrode drivers 20 and 21 emits light, and the light is extracted to the substrate 12 side. As a result, the display of pixels according to the screen display data instructed by the display controller 28 is performed in each of the split display units 19A and 19B.

This embodiment has the following effects. (1) The organic EL element 14 is provided on the inner surface of the cover 15 attached to the substrate 12 in a state where the organic EL element 14 is sealed.
A plurality of driving circuit elements (first and second driving elements for driving the
Data electrode drivers 20 and 21, scan electrode driver 2
2) is provided. Then, the other ends of the wirings 29a to 33a whose one ends are connected to the drive circuit elements are arranged at positions corresponding to one side of the cover 15. Therefore, the organic EL display device 11 can be downsized as compared with the case where the first and second data electrode drivers 20 and 21 and the scan electrode driver 22 are mounted on the substrate 12 outside the cover 15, and an external control device ( It is possible to reduce the number of connection steps with the display controller 28).

(2) The other ends of the wirings 29a to 33a correspond to the other ends of the wirings 29a to 33a and the connection pad terminals 23 to 27 formed on the substrate 12 so as to be orthogonal to the outer edge of the cover 15. It is formed in parallel. Wiring 29a-3
If the ends of 3a are not parallel to the connection pad terminals 23 to 27, it is difficult to join the ends with high accuracy.
However, since the ends of the wirings 29a to 33a are parallel to the connection pad terminals 23 to 27, some displacement of the cover 15 in the longitudinal direction of the connection pad terminals 23 to 27 is allowed.

(3) The organic EL element 14 is driven by a passive driving method, and the display portion 19 including the organic EL element 14 is divided into a plurality of parts in the extending direction of the data electrodes 16. By dividing the display unit 19 including the organic EL element 14, the driving circuit element for driving the data electrode 16 (first and second data electrode drivers 2
0,21) increases. However, each of the wirings 29a to 3 connected to the first and second data electrode drivers 20 and 21.
Since the end portion of 2a is connected to the 23 to 26 connection pad terminals arranged at the position corresponding to one side of the cover 15, the connection man-hours for connecting to an external control device are almost the same as those when the number of drive circuit elements is small. it can.

(4) The cover 15 is made of a transparent material, and the peripheral edge portion 15b of the cover 15 is joined to the substrate 12.
And a position facing the peripheral edge portion 15b of the substrate 12,
Positioning marks 35 and 36 are provided. Therefore, when the cover 15 is attached to the substrate 12, the mark 3
By using 5,36 to align the two,
It becomes easy to adhere the cover 15 to the predetermined position of the substrate 12.

(5) Each driving circuit element (first and second
Data electrode drivers 20 and 21, scan electrode driver 2
2) is disposed on the inner surface of the cover 15. Therefore, unlike the configuration in which each driving circuit element is arranged outside the cover 15, it is not necessary to provide a protective member for each driving circuit element.

(6) Each driving circuit element (first and second
Data electrode drivers 20 and 21, scan electrode driver 2
2) The recess 15a provided in the cover 15 for housing
Has a slanted peripheral edge. Therefore, as compared with the case where the peripheral edge of the recess 15a is formed at a right angle to the surface on which each drive circuit element is arranged, the wirings 29a to 33 are formed on the cover 15.
The work of forming a, 29b to 33b is facilitated.

(7) The cover 15 is adhered to the substrate 12 via the ACF 34, and the ACF 34 is a thermosetting resin in which conductive particles 34a are present in a dispersed state. The ACF 34 is a B-stage thermosetting resin. (Semi-cured)
In this state, the resin is once softened by heat and pressure, and adhesively hardened. Therefore, the cover 15 is adhered to the substrate 12, and the wirings 29a to 33a and 29b to 33b are attached.
The connection with the data electrodes 16 and the like can be simultaneously and easily performed. Further, as compared with an ACF having a configuration in which a thermoplastic resin is used instead of the thermosetting resin, the work of sticking the ACF 34 at a predetermined position on the substrate 12 is easier.

The embodiment is not limited to the above, but may be configured as follows, for example. The first data electrode driver 20, the second data electrode driver 21, and the scan electrode driver 22 may be provided on the outer surface of the cover 15 instead of being provided on the inner surface of the cover 15. FIG. 6 is a schematic cross-sectional view taken at the same position as in FIG. 1, and only the first data electrode driver 20 is shown. Wirings 29a to 33a and 29b to 33b (neither is shown)
Are formed on the outer surface of the cover 15. Each wiring 29a-3
3a, 29b to 33b are formed so as to extend along the upper surface of the cover 15, bend downward at a position corresponding to the peripheral surface, and further wrap around the other end to the peripheral edge portion 15b. Also in this case, the same effects as (1) to (4) and (7) of the above-described embodiment can be obtained. In addition, the degree of freedom in the arrangement position of the hygroscopic agent (not shown) is increased.

When the scan electrodes 18 are divided into two and are simultaneously driven, two scan electrode drivers 22 may be provided as shown in FIG. In this case, both scan electrode drivers 2
An IC with a small capacity can be used as 2.

The display unit 19 may not be divided into two, and as shown in FIG. 8, one first data electrode driver 20 and one scan electrode driver 22 may be provided as drive circuit elements. In this configuration, the wiring 29 a of the first data electrode driver 20 and the wiring 33 a of the scan electrode driver 22 are connected to the connection pad terminals 2 on different sides of the cover 15.
3 and the connection pad terminals 27 can be connected, but they are arranged so as to be connected to the connection pad terminals 23 and 27 on the same side. Therefore, the number of connecting steps with the external control device (display controller 28) can be reduced.

Each wiring 29a to 33a, 29b to 33
b does not need to be formed of ITO and may be formed of metal. When the wiring is formed of metal, the resistivity becomes smaller as compared with the case where it is formed of ITO if the wiring has the same sectional area. When the drive circuit elements are arranged on the outer surface of the cover 15, when the wirings 29a to 33a and 29b to 33b are made of metal, a protection process is required to prevent corrosion due to the use environment. become.

The ACF 34 used for fixing the cover 15 to the substrate 12 is not limited to the configuration in which the conductive particles 34a exist in the thermosetting resin in a dispersed state, but the conductive particles in a dispersed state in the thermoplastic resin. Existing configurations may be used.

Anisotropic conductive material is used for the substrate 1 instead of the ACF 34 used for fixing the cover 15 to the substrate 12.
2 may be applied. The anisotropic conductive material is mainly composed of an adhesive, a conductive material and a dispersant. The adhesive includes a thermosetting adhesive and a thermoplastic adhesive, and the conductive material may be conductive particles used in ACF. The anisotropic conductive material is applied to the substrate 12 by, for example, a dispenser. After the application of the anisotropic conductive material, the cover 15 is fixed to the substrate 12 in the same procedure as that after the ACF attachment.

The ACF 34 is also used as the ACF used when connecting the respective driving circuit elements (the first and second data electrode drivers 20, 21 and the scanning electrode driver 22) to the wirings 29a to 33a and 29b to 33b. Similar modifications and alternatives can be applied.

The organic EL layer 17 is not limited to the white light emitting layer, and a blue light emitting layer may be used. In this case, by using a color filter provided with a color conversion layer as the color filter 13, the color of light after passing through the color filter 13 corresponds to pixels of R (red), G (green), and B (blue). It becomes the light of. Therefore, as in the case of the white light emitting layer, a desired color can be reproduced in the same color light emitting layer.

As the organic EL display device 11 for color display, in place of the structure using the color filter 13, the organic EL layer 17 is replaced with a white light emitting layer, and three types of light emitting layers of red, blue and green are used. If it is configured, the color filter 1
3 can be omitted.

The organic EL display device 11 is not limited to a color display device and may be a monochrome display device. In this case, each organic EL layer 17 of the organic EL element 14 is formed so as to emit light of the same color.

Not limited to the passive matrix drive type organic EL display device, it may be applied to the active matrix drive type organic EL display device. When the cover 15 is made of glass, instead of forming the recess 15a by sandblasting or etching, the glass plate may be heated and softened and then pressed by a mold to form the recess 15a having a predetermined shape. .

The cover 15 is not limited to one made of a transparent material such as a glass plate, but may be made of an opaque material, for example, a ceramic other than glass such as porcelain. Further, it may be formed of a resin having low oxygen or water permeability or a laminate of a resin and a metal film.

The invention (technical idea) understood from the above embodiment will be described below. (1) In the invention according to claim 5, the cover is formed such that a peripheral edge of a concave portion provided inside thereof is oblique.

(2) In the invention according to any one of claims 1 to 5 and the technical idea (1), the cover is adhered to the substrate through an anisotropic conductive material. ing.

(3) In the invention described in the technical idea (2), the anisotropic conductive material is an anisotropic conductive sheet.

[0056]

As described above in detail, according to the first to fifth aspects, the size can be reduced and the number of connecting steps with the external control device can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an organic EL display device according to an embodiment.

FIG. 2 is a schematic plan view showing a state in which the cover is also removed.

FIG. 3 is a schematic plan view showing a connection state of drive circuit elements and the like on the cover.

4 (a) and 4 (b) are schematic diagrams showing a connecting action by an ACF.

FIG. 5 is a schematic plan view showing a state where the organic EL display device is connected to a driver.

FIG. 6 is a schematic cross-sectional view of another embodiment.

FIG. 7 is a schematic plan view of another embodiment.

FIG. 8 is a schematic plan view of another embodiment.

[Explanation of symbols]

11 ... Organic EL display device, 12 ... Substrate, 14 ... Organic EL
Element, 15 ... Cover, 15b ... Peripheral part, 16 ... Data electrode as first electrode, 17 ... Organic EL layer, 18 ... Scan electrode as second electrode, 19 ... Display section, 20 ... As driving circuit element First data electrode driver, 21 ... Second data electrode driver, 22 ... Scan electrode driver, 23-27 ... Connection pad terminals, 29a-33a, 2
9b to 33b ... Wiring, 35, 36 ... Marks.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H05B 33/14 H05B 33/14 A

Claims (5)

[Claims] 1. An organic EL element is formed by stacking a first electrode and a second electrode on a substrate with an organic EL layer sandwiched therebetween,
An organic EL display device in which the organic EL element is sealed with a cover, wherein a plurality of drive circuit elements for driving the organic EL element are provided on an outer surface or an inner surface of the cover, and one end of each of the drive circuits is provided. An organic EL display device in which the other end of the wiring connected to the circuit element for use is arranged at a position corresponding to one side of the cover. 2. The other end of the wiring is formed in parallel with a connection pad terminal formed on the substrate so as to be orthogonal to the outer edge of the cover in correspondence with the other end of the wiring. The organic EL display device described in 1. 3. The organic EL element according to claim 1 or 2, wherein the organic EL element is driven by a passive driving method, and a display section including the organic EL element is divided into a plurality of portions in the extending direction of the data electrode. The organic EL display device described. 4. The cover is formed of a transparent material, and alignment marks are provided at a peripheral edge portion of the cover joined to the substrate and a position facing the peripheral edge portion of the substrate. The organic EL display device according to any one of claims 1 to 3. 5. The organic EL display device according to claim 1, wherein each of the drive circuit elements is arranged on an inner surface of the cover.