KR100726994B1 - Organic Electro-Luminescence Display Device And Fabricating Method Thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescent display device which is easy to apply sealant and a method of manufacturing the same.

An organic electroluminescent display according to the present invention comprises a substrate; An organic electroluminescent array positioned on the substrate and having an anode and a cathode interposed therebetween; A data pad and a scan pad for transmitting a driving signal from the outside to the organic electroluminescent array; A data line for supplying a drive signal from the data pad to the anode; Scan wiring for supplying a drive signal from the scan pad to the cathode; And a dummy insulating film formed on at least a portion of at least one of the data and scan lines.

Description

Organic electroluminescent display device and manufacturing method thereof {Organic Electro-Luminescence Display Device And Fabricating Method Thereof}

1 is a diagram schematically showing a conventional organic EL display device.

FIG. 2 is a plan view specifically showing region A of FIG. 1. FIG.

3 is a cross-sectional view taken along line II ′ and II-II ′ of FIG. 2;

4 is a view illustrating a light emission principle of a general organic electroluminescent display.

FIG. 5 is a cross-sectional view taken along line III-III ′ of FIG. 1;

FIG. 6 is a cross-sectional view illustrating a phenomenon in which the sealant illustrated in FIG. 5 is broken.

Fig. 7 is a sectional view of an organic EL display device according to the present invention.

8 is a flowchart showing a method of manufacturing an organic EL display device according to the present invention.

<Brief description of symbols for the main parts of the drawings>

2, 102: substrate 4: anode

6: insulating film 8: partition wall

10 organic light emitting layer 12 cathode

25: pad portion 26, 126: sealant

28: cap 52, 152: scan wiring

54, 154: data wirings 62, 64, 66, 68: conductive layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescent display, and more particularly, to an organic electroluminescent display and a method of manufacturing the same, wherein the sealant is easily coated.

Recently, various types of weight and volume, which are disadvantages of cathode ray tubes, can be reduced. Flat panel displays are being developed. Flat display devices include Liquid Crystal Display (LCD), Field Emission Display (FED), Plasma Display Panel (PDP) and Electro-luminescence (EL) display devices. Etc. PDPs are most advantageous for large screens due to their relatively simple structure and manufacturing process, but have the disadvantages of low luminous efficiency, low luminance and high power consumption. Because LCD uses semiconductor process, large screen is difficult and power consumption is high due to backlight unit. In addition, LCD has a disadvantage of high light loss and a narrow viewing angle due to optical elements such as a polarizing filter, a prism sheet, and a diffusion plate. On the other hand, the EL display device has advantages of fast response speed, high luminous efficiency, brightness and viewing angle, and is largely divided into an inorganic EL display device and an organic EL display device according to the material used.

The organic EL display device is driven at a lower voltage of about 5 to 20 V than the inorganic EL display device requiring a high voltage of 100 to 200 V, thereby enabling direct DC low voltage driving. In addition, the organic EL display device has excellent characteristics such as wide viewing angle, high-speed response, and high contrast ratio, so that it is a pixel of a graphic display, a pixel of a television image display, or a surface light source. It can be used and is not only thin and light but also good in color, making it suitable for next-generation flat panel displays.

1 is a view schematically showing a conventional organic EL display device, FIG. 2 is a plan view specifically showing a part (area A) of FIG. 1, and FIG. 3 is a line I-I 'and II-II of FIG. 'It is a cross-sectional view showing a cut line.

1 to 3 includes a display area P1 in which an organic EL array is formed and a non-display area P2 in which the pad portion 25 is located.

The organic EL array formed in the display area P1 is formed on the substrate 2 with an anode 4 formed at a predetermined interval and a cathode 12 formed in a direction crossing the anode 4. On the substrate 2 on which the anode 4 is formed, an insulating film 6 having an opening for each EL cell region is formed. On the insulating film 6, the partition 8 of an overhang structure is located in the direction crossing the anode 4. The organic light emitting layer 10 and the cathode 12 are sequentially deposited on the insulating film 6 on which the partition 8 is formed.

In the non-display area P2, data wires 54 extended from the anode 4 of the display area P1, and data pads for supplying data voltages to the anode 4 through the data wires 54 are formed. The scan wiring 52 connected to the cathode 12 and the scan pad for supplying a scan voltage to the cathode 12 through the scan wiring 52 are provided. Scan pads are formed on both sides of the data pad. The substrate 2 and the cap 28 on which the organic EL array such as the anode 4 is formed are bonded together through a sealant 26 such as an epoxy resin according to an encapsulation process. This is because the organic EL array has a property of being easily degraded by moisture and oxygen.

In the conventional organic EL display device having such a structure, when voltage is applied between the anode 4 and the cathode 12 as shown in FIG. 4, electrons generated from the cathode 12 are transferred to the electron injection layer 10a. And the light emitting layer 10c toward the light emitting layer 10c through the electron transporting layer 10b. In addition, holes generated from the anode 4 move toward the light emitting layer 10c through the hole injection layer 10e and the hole transport layer 10d. Accordingly, in the light emitting layer 10c, light is generated by collision and recombination of electrons and holes supplied from the electron transporting layer 10b and the hole transporting layer 10d, and the light is emitted to the outside through the anode 4 to burn the image. Will be displayed.

FIG. 5 is a cross-sectional view taken along line III-III ′ of FIG. 1.

Referring to FIG. 5, the scan wirings 52 and the data wirings 54 on the substrate 2 may include second to fourth conductive layers for improving conductivity of the first conductive layer 62 and the first conductive layer 62. (64, 66, 68). Here, indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), or the like is used as the first conductive layer 62, and the second and fourth conductive layers 64 and 68 are used. Molybdenum (Mo) or the like is used, and aluminum (Al) or the like is used as the third conductive layer 66. The sealant 26 for attaching the cap 28 is coated on the scan wiring 52 and the data wiring 54.

As the scan wiring 52 and the data wiring 54 of such an organic EL display device become larger, the thickness becomes thicker, which causes a problem of acting as a stopper as shown in FIG.

Accordingly, an object of the present invention is to provide an organic electroluminescent display device and a method of manufacturing the same, which are easy to apply the sealant.

In order to achieve the above object, the organic electroluminescent display device according to the present invention comprises an organic electroluminescent array formed on the substrate with an anode and a cathode between the organic light emitting layer; A data pad and a scan pad for transmitting a driving signal from the outside to the organic electroluminescent array; A data line for supplying a drive signal from the data pad to the anode; Scan wiring for supplying a drive signal from the scan pad to the cathode; And a dummy insulating film formed on at least a portion of at least one of the data and scan lines. The dummy insulating film is formed on the data line.

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The dummy insulating film is formed on the scan wiring.

The dummy insulating film is formed on both the data line and the scan line.

The dummy insulating film has a curved surface.

An organic electroluminescent display device according to the present invention comprises: a cap for protecting the organic electroluminescent array; And a sealant applied on the dummy insulating film to bond the substrate and the cap together.

The dummy insulating film is formed in a region where the sealant is applied.

The organic electroluminescent display according to the present invention further includes an insulating layer formed on the anode and having an opening for each region where the organic light emitting layer is to be formed.

The insulating film and the dummy insulating film are simultaneously formed.

A method of manufacturing an organic electroluminescent display device according to the present invention comprises the steps of forming an organic electroluminescent array on which an anode and a cathode are formed with an organic light emitting layer therebetween; Forming a data pad and a scan pad for transmitting a driving signal from an external device to the organic electroluminescent array; Forming a data line for supplying a driving signal from the data pad to the anode; Forming a scan wiring for supplying a driving signal from the scan pad to the cathode; Forming a dummy insulating layer on at least a portion of at least one of the data and scan lines.

The dummy insulating film is formed on the data line.

The dummy insulating film is formed on the scan wiring.

The dummy insulating film is formed on both the data line and the scan line.

The dummy insulating film has a curved surface.

A method of manufacturing an organic electroluminescent display device according to the present invention includes forming a cap for protecting the organic electroluminescent array; And forming a sealant applied on the dummy insulating film to bond the substrate and the cap together.

The dummy insulating film is formed in a region where the sealant is applied.

The method of manufacturing an organic electroluminescent display device according to the present invention further includes forming an insulating film having an opening on each of the regions where the organic light emitting layer is to be formed.

The insulating film and the dummy insulating film are spaced apart from each other, and are formed at the same time.

Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 7 to 8.

7 is a cross-sectional view illustrating scan wiring and data wiring of an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the scan wiring 152 and the data wiring 154 on the substrate 102 may include second to fourth conductive layers for improving conductivity of the first conductive layer 162 and the first conductive layer 162. 164, 166, and 168. In this case, indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), or the like is used as the first conductive layer 162, and the second and fourth conductive layers 164 and 168 may be used. Molybdenum (Mo) or the like is used, and aluminum (Al) or the like is used as the third conductive layer 166. The dummy insulating film 106 having a curved surface is formed on the scan wiring 152 and the data wiring 154 so as to roundly cover the scan wiring 152 and the data wiring 154. At this time, the dummy insulating film 106 is formed to be spaced apart from the insulating film formed in the organic EL array of the organic electroluminescent display, and is formed at the same time. The insulating film of the organic EL array is formed in the same shape as the dummy insulating film 106 on the scan wiring 152 and the data wiring 154.

When the sealant 126 is coated on the dummy insulating layer 106, even if the thickness of the scan wiring 152 and the data wiring 154 is high, the dummy formed roundly on the scan wiring 152 and the data wiring 154. The sealant 126 may be applied to the insulating layer 106 without breaking.

8 is a flowchart showing a method of manufacturing an organic EL display device according to the present invention.

First, a scan wiring and a data wiring are formed on the substrate. (S1) A dummy insulating film having a curved surface is orthogonal to the direction in which the sealant is applied on the scan wiring and the data wiring. Is applied (S3) serves to bond the cap and the substrate.

As described above, the organic electroluminescent display device and the manufacturing method thereof according to the present invention have a sealant for bonding the cap and the substrate to each other by forming a dummy insulating film having a curved surface to round the scan wiring and the data wiring on the scan wiring and the data wiring. It is easy to apply.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (18)

Board; An organic electroluminescent array disposed on the substrate and having an anode and a cathode formed therebetween; A data pad and a scan pad for transmitting a driving signal from the outside to the organic electroluminescent array; A data line for supplying a drive signal from the data pad to the anode; Scan wiring for supplying a drive signal from the scan pad to the cathode; And a dummy insulating film formed on at least a portion of the data line or the scan line. According to claim 1, And the dummy insulating layer is formed on the data line. According to claim 1, And the dummy insulating layer is formed on the scan line. According to claim 1, The dummy insulating layer is formed on both the data line and the scan line. According to claim 1, The dummy insulating layer has a curved surface. According to claim 1, A cap for protecting the organic electroluminescent array; And a sealant coated on the dummy insulating film to bond the substrate and the cap together. The method of claim 6, And the dummy insulating film is formed in a region where the sealant is applied. According to claim 1, And an insulating film formed on the anode and having an opening for each region where the organic light emitting layer is to be formed. The method of claim 8, And the insulating layer and the dummy insulating layer are spaced apart from each other and formed at the same time. Forming an organic electroluminescent array on which the anode and the cathode are formed with an organic light emitting layer interposed therebetween; Forming a data pad and a scan pad for transmitting a driving signal from an external device to the organic electroluminescent array; Forming a data line for supplying a driving signal from the data pad to the anode; Forming a scan wiring for supplying a driving signal from the scan pad to the cathode; And forming a dummy insulating film on at least a portion of at least one of the data line and the scan line. The method of claim 10, And the dummy insulating film is formed on the data line. The method of claim 10, And the dummy insulating film is formed on the scan line. The method of claim 10, And the dummy insulating film is formed on both the data line and the scan line. The method of claim 10, And the dummy insulating film has a curved surface. The method of claim 10, Forming a cap to protect the organic electroluminescent array; And forming a sealant applied on the dummy insulating film to bond the substrate and the cap together. The method of claim 15, And the dummy insulating film is formed in a region to which the sealant is applied. The method of claim 10, And forming an insulating layer on the anode, the insulating layer having an opening for each region in which the organic light emitting layer is to be formed. The method of claim 17, And the dummy insulating film and the dummy insulating film are formed at the same time.

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