KR100637065B1 - Mother Glass For Organic Electro Luminescence Device and Fabricating Method of Organic Electro Luminescence Device Using The Same - Google Patents

Abstract

The present invention relates to a mother substrate for an organic electroluminescent display device which can increase productivity by increasing an area in which an array can be formed, and a method of manufacturing the organic electroluminescent display device using the same.

The present invention provides a mother substrate for an organic electroluminescent display device having organic electroluminescent arrays including first and second electrodes formed to cross each other with an organic light emitting layer interposed therebetween, the first electrode of the organic electroluminescent array. A first signal line connected to the second signal line connected to the second electrode; A scan pad group extending from the first signal line and a scan pad group extending from the second signal line and positioned on left and right sides of the data pad group; A negative short bar positioned between the scan pad group and the data pad group to apply a negative voltage during a lighting test; And a positive short bar positioned at at least one of the data pad group and the left negative short bar and between the data pad group and the right negative short bar.

Description

Mother Glass For Organic Electro Luminescence Device And Fabricating Method Of Organic Electro Luminescence Device Using The Same}             

1 is a view showing one light emitting cell of a conventional organic electroluminescent display device.

2 is a diagram for explaining a light emission principle of a conventional organic light emitting display device.

FIG. 3 is a view illustrating a mother glass on which a plurality of organic electroluminescent arrays are formed.

4 is a view showing a mother glass (mother glass) for an organic electroluminescent array according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating in detail an organic electroluminescent array of FIG. 4.

6 is a flowchart illustrating a method of manufacturing an organic light emitting display device using the mother substrate shown in FIG. 5.

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

12,112: second electrode (cathode electrode) 4,104: first electrode (anode electrode)

10,110: organic light emitting layer, 63: alignment mark

57, 157: scan pad 56, 156: data pad

54,154: data line 55,155: scan line

53a, 153a: positive short bar 53b, 153b: negative short bar

The present invention relates to an organic electroluminescent display device, and more particularly, to a mother substrate for an organic electroluminescent display device capable of improving productivity by increasing an area in which an array can be formed, and a method of manufacturing an organic electroluminescent display device using the same. will be.

Recently, various flat panel displays have been developed to reduce weight and volume, which are disadvantages of cathode ray tubes. Such flat panel displays include liquid crystal displays (hereinafter referred to as "LCDs"), field emission displays (FEDs), plasma display panels (hereinafter referred to as PDPs), and electroluminescence. Nessence ("EL") display device, etc. There are active researches to improve the display quality of such a flat panel display device and attempt to enlarge the screen.

Among these, PDP is attracting attention as a display device that is light and small and is most advantageous for large screens because of its simple structure and manufacturing process, but it has disadvantages of low luminous efficiency, low luminance and high power consumption. On the other hand, an active matrix LCD having a thin film transistor (TFT) as a switching element has a disadvantage in that it is difficult to make a large screen because of the semiconductor process, and power consumption is large due to the backlight unit. Optical elements such as a filter, a prism sheet, and a diffusion plate have a large optical loss and a narrow viewing angle.

On the other hand, EL devices are classified into inorganic EL devices and organic EL devices according to the material of the light emitting layer. The EL devices are self-luminous devices that emit light by themselves, and have a fast response speed and high luminous efficiency, luminance, and viewing angle. Inorganic EL devices have higher power consumption and higher luminance than organic EL devices, and cannot emit various colors of R, G, and B. On the other hand, the organic EL device is driven at a low DC voltage of several tens of volts, has a fast response speed, obtains high brightness, and emits various colors of R, G, and B, which is suitable for next-generation flat panel display devices.

1 is a cross-sectional view showing one organic light emitting cell (or EL cell) of a conventional organic EL display element, and FIG. 2 is a diagram for explaining a light emission principle of an organic electroluminescent display element.

The EL cell 3 shown in FIG. 1 includes an organic light emitting layer 10 formed between the first electrode (or anode electrode) 4 and the second electrode (or cathode electrode) 12, and the organic light emitting layer 10 ) Is provided with an electron injection layer 10a, an electron transport layer 10b, a light emitting layer 10c, a hole transport layer 10d, and a hole injection layer 10e.

When a voltage is applied between the first electrode 4 and the second electrode 12 of the EL cell 3, electrons generated from the second electrode 12 are transferred to the electron injection layer 10a as shown in FIG. 2. And toward the light emitting layer 10c through the electron transport layer 10b. In addition, holes generated from the first electrode 4 move toward the light emitting layer 10c through the hole injection layer 10d and the hole transport layer 10d. Accordingly, in the light emitting layer 10c, excitons are formed by recombination of electrons and electrons supplied from the electron transport layer 10b and the hole transport layer 10b, and the excitons are excited to the ground state and emit light of constant energy. The image is displayed by being discharged to the outside through the first electrode 4.

3 is a diagram illustrating an array region P1 and a vialay region P2 of a conventional mother substrate.

Referring to FIG. 3, an organic EL array including a plurality of EL cells 3 is formed in the array area P1 so that an image is realized when an organic light is emitted, and an organic EL in the display area A. The data lines 54 and the scan lines 55 which are extended in the array are positioned, and are respectively extended to correspond to the data lines 54 and the scan lines 55, so that the positive polarity of the via region P2 can be obtained. Data pads 56 (hereinafter, "data pads" are referred to as "data pad group") and scan pads 57 electrically connected to the short bar 53a and the negative short bar 53b, respectively. Hereinafter, the non-display area B in which the "scan pads" are referred to as "scan pad groups" is included. In this case, the scan pads 57 are located at both sides of the data pad 56. Dummy pad groups 70 are formed between the scan pad 57 group and the data pad 56 group, respectively.

In the via region P2, positive and negative short bars 53 which are used for the lighting inspection of the light emitting cells of the organic EL element are formed.

The positive short bar 53a is electrically connected to the data pad 56 which is connected to the data lines 54 positioned in the non-display area B of the array area P1, and the negative short bar 53b is Each of the scan pads 57 is electrically connected to the scan lines 55. The positive and negative short bars 53 are connected to the test pins of the test equipment during the lighting test, thereby transferring voltages to the data pads 56 and the scan pads 57 of the array region P1.

The vialay region P2 in which the positive and negative short bars 53 are formed is removed during the scribing process.

The positive and negative short bars 53 have a line width d1 of about 2000 μm or more for contact with the needle pin of the inspection equipment, thereby increasing the vialay region P2 of the mother substrate and increasing the array area ( The ratio occupied by P1 becomes small, resulting in a decrease in productivity of the entire organic EL display element.

Accordingly, an object of the present invention is to provide a mother substrate for an organic electroluminescent display device capable of increasing productivity by increasing an area in which an array can be formed, and a method of manufacturing the organic electroluminescent display device using the same.

In order to achieve the above object, the present invention is a mother substrate for an organic electroluminescent display device having an organic electroluminescent array including a first electrode and a second electrode formed to cross each other with an organic light emitting layer therebetween, the organic A first signal line connected with the first electrode of the electroluminescent array and a second signal line connected with the second electrode; A scan pad group extending from the first signal line and a scan pad group extending from the second signal line and positioned on left and right sides of the data pad group; A negative short bar positioned between the scan pad group and the data pad group to apply a negative voltage during a lighting test; And a positive short bar positioned at at least one of the data pad group and the left negative short bar and between the data pad group and the right negative short bar.

The positive short bar and the negative short bar may be formed of the same material as the data pad group and the scan pad group.

A method of manufacturing an organic electroluminescent display device according to the present invention includes an organic electroluminescent array, first and second signal lines electrically connected to the organic electroluminescent array, a data pad group connected to the first signal line, and the second Forming a scan pad group connected to signal lines and positioned on left and right sides of the data pad group; At least one of a negative short bar positioned between the data pad group and the scan pad group and between the data pad group and the left negative short bar, and between the data pad group and the right negative short bar. Forming a positive short bar in the; And checking whether the organic electroluminescent array is turned on by applying a negative voltage to the negative short bar and applying a positive voltage to the positive short bar.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 4 to 6.

4 is a diagram illustrating a mother substrate for an organic EL display device having an array region P1 and a vialay region P2 according to an exemplary embodiment of the present invention, and FIG. 5 is an organic substrate formed in the array region P1 of FIG. 4. It is a figure which shows an EL array.

In the array area P1, an organic EL array including a plurality of EL cells is formed to display an image when an organic light is emitted, and a data line (or "") extending from the organic EL array of the display area A. The first signal lines 154 and the scan lines (or second signal lines) 155 are located and correspond to the data lines 154 and the scan lines 155. A positive short bar 153a and a negative short bar 53b positioned between the data pad 56 group and the scan pad 57 group that are respectively extended, and the scan pad 57 group and the data pad 56 group. It includes a non-display area (B) including a.

As shown in FIG. 5, the organic EL array is formed on the substrate 102 in a direction in which the anode electrode (or first electrode) 104 and the cathode electrode (or second electrode) 112 cross each other. A plurality of first electrodes 104 are formed on the substrate 102 at predetermined intervals. On the substrate 102 on which the first electrode 104 is formed, an insulating film (not shown) having an opening for each EL cell E region is formed. On the insulating layer, a partition 108 for separating the organic light emitting layer 110 and the second electrode 112 to be formed thereon is positioned. The partition 108 is formed in a direction crossing the first electrode 104 and has a reverse taper structure in which the upper end portion has a wider width than the lower end portion. On the insulating film on which the partition 108 is formed, the organic light emitting layer 110 deposited using a mask is formed, and then a second electrode 112 is formed. Here, the first and second electrodes 104 and 112 positioned between the organic light emitting layer 110 and the organic light emitting layer 110 are also referred to as light emitting cells E.

The positive short bar 53a and the negative short bar 153b of the non-display area B are positioned between the scan pad 157 group and the data pad 156 group. That is, unlike the prior art, the dummy pad group is removed and the positive short bar 153a and the negative short bar 153b are positioned in the dummy pad group forming region. Accordingly, the area occupied by the vialay region P2 excluding the array region P1 is considerably reduced, thereby securing the position of the array region P1.

This will be described in more detail as follows.

Conventionally, the positive and negative short bars 153 extend from the data pad group 156 and the scan pad group 157 to be formed in the non-display area B. FIG. The positive and negative short bars 153 are removed after being used during the lighting inspection of the light emitting cell E of the organic EL display device, thereby eliminating the area of the mother substrate corresponding to the formation area of the positive and negative short bars 153. There was a loss. In the present invention, the positive and negative short bar 153 can be located between the data pad group 156 and the scan pad group 157, thereby mosquitoes according to the formation area of the positive and negative short bar 153. Loss of plate does not occur. In general, since the pitch of the formation region of the conventional dummy pad group is about 5000 to 7000 μm, sufficient space for the positive and negative short bars 153 to be positioned in the dummy pad group formation region is secured. As a result, the formation area of the array region P1 is sufficiently secured, thereby improving the productivity of the organic EL display element.

On the other hand, the positive short bar 153a connected to the data pad 156 group may be formed on only one of the left and right sides of the data pad 157 group, and the positive and negative short bar 153 may be a data line. 154 and the scan line 155, the data pad 156 group and the scan pad 157 group is formed of the same material.

As such, the mother substrate for the organic EL display device according to the exemplary embodiment of the present invention is positioned between the positive and negative short bars 153, the scan pad 157 group, and the data pad 156 group, thereby providing an array region ( By significantly securing P1), the productivity of the device is ensured.

6 is a flowchart illustrating a method of manufacturing an organic light emitting display device according to the present invention.

First, a scan line 155 and a data line 154 electrically connected to an organic EL array and an organic EL array to a mother substrate for an organic EL display element, and a group of data pads 156 connected to the data lines 154. In addition, the scan pads 157 are connected to the scan line 155 and positioned on the left and right sides of the data pad 156 group. (S2) In this case, the organic EL array includes an organic light emitting layer 110 and an organic light emitting layer. A first electrode (anode electrode) and a second electrode (cathode electrode) are formed to intersect with each other with the interlayer 110 interposed therebetween.

Subsequently, a negative short bar 153a is formed between the data pad 156 group and the scan pad 157 groups positioned on the left and right sides of the data pad 156 group, respectively, and the data pad 156 group and the left side portion are provided. A positive short bar 153b is formed between at least one of the polar short bar 153a and between the data pad 156 group and the right negative short bar 153a. (S4) On the other hand, the negative short The bar 153a and the positive short bar 153b may be formed of the same material at the same time as the data line 154, the scan line 155, the data pad 156, and the scan pad 157.

Thereafter, a negative voltage is applied to the negative short bar 153a and a positive voltage is applied to the positive short bar 153b to check whether the organic EL array is turned on (S6). If it is determined and is determined to be normal, the encapsulation process is carried out, and the organic EL array is packaged by the cap (S8).

As described above, in the mother substrate for the organic electroluminescent display device and the method of manufacturing the organic EL display device using the same according to the present invention, negative and positive short bars are positioned between the data pad group and the scan pad group. As a result, the array area in which the organic electroluminescent array and the like are formed is sufficiently secured, thereby improving the productivity of the organic EL display element.

It will be understood that various changes and modifications can be made by those skilled in the art through the above description 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 (3)

A mother substrate for an organic electroluminescent display device having organic electroluminescent arrays including first and second electrodes formed to cross each other with an organic light emitting layer interposed therebetween. A first signal line connected with a first electrode of the organic light emitting array and a second signal line connected with the second electrode; A scan pad group extending from the first signal line and a scan pad group extending from the second signal line and positioned on left and right sides of the data pad group; A negative short bar positioned between the scan pad group and the data pad group to apply a negative voltage during a lighting test; A mother substrate for an organic light emitting display device, comprising: a positive short bar positioned at at least one of the data pad group and the left negative short bar and between the data pad group and the right negative short bar. . The method of claim 1, And the cathode short bar and the anode short bar are formed of the same material as the data pad group and the scan pad group. An organic electroluminescent array, first and second signal lines electrically connected to the organic electroluminescent array, a data pad group connected to the first signal line, and a left and right sides of the data pad group connected to the second signal line, respectively Forming a group of scan pads to be located; At least one of a negative short bar positioned between the data pad group and the scan pad group and between the data pad group and the left negative short bar, and between the data pad group and the right negative short bar. Forming a positive short bar in the; And checking whether the organic electroluminescent array is turned on by applying a negative voltage to the negative short bar and applying a positive voltage to the positive short bar.

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