JP5263605B2 - Mother panel and organic EL panel manufacturing method - Google Patents

Description

  The present invention relates to a mother panel in which a plurality of light emitting display portions each having a plurality of light emitting pixels formed by sandwiching at least a functional layer including an organic light emitting layer between an anode and a cathode are formed in a row on a base substrate, and the mother panel The present invention relates to a method of manufacturing an organic EL panel using

  Conventionally, as an organic EL panel, for example, an organic EL element in which a functional layer having at least an organic light emitting layer is sandwiched between an anode made of ITO (indium tin oxide) and a cathode made of aluminum (Al) or the like. A plurality of light-emitting pixels that are formed on a translucent support substrate to form a dot matrix type light-emitting display unit is known (see, for example, Patent Document 1). Such an organic EL element emits light by injecting holes from the anode and injecting electrons from the cathode and recombining the holes and electrons in the light emitting layer. The organic EL element has a so-called diode characteristic in which current does not easily flow from the cathode side to the anode side.

  Further, as a method for manufacturing an organic EL panel, a plurality of rows of the light emitting display portions are formed on a base substrate to produce a mother panel, and then the mother panel is cut according to each of the light emitting display portions. A so-called multi-chamfer manufacturing method for obtaining an organic EL panel is known (see, for example, Patent Document 2).

  In addition, in the organic EL panel, when a defective part in a manufacturing process or a defective part that is a high leak part is formed in the organic EL element, a short circuit occurs between the electrodes when the organic EL panel is driven, There has been a problem that luminance unevenness of the organic EL element occurs and the display quality deteriorates. As a method for solving the above-described problem, as disclosed in Patent Document 3, in the manufacturing process of the organic EL panel, light emission of the organic EL element is performed between the anode and the cathode after the formation of the organic EL element. A method of performing an aging process for repairing the organic EL element by applying a voltage in a direction opposite to a voltage contributing to the above (hereinafter referred to as a reverse bias voltage) to destroy and remove the defective portion in advance. Yes.

  Further, the applicant of the present application has found that, besides the voltage value of the applied voltage, the electrostatic capacity accumulated in the organic EL element is related to the suitability of the aging treatment, and disclosed in Patent Document 4.

JP-A-8-315981 JP 2004-63407 A JP-A-4-14794 JP 2007-141536 A

  In the method of manufacturing an organic EL panel by multi-cavity, as disclosed in Patent Document 2, anode conduction lines that connect each anode in all the light emitting display units and the power source for the aging treatment, and all the above It is possible to form a cathode conduction line for connecting each cathode in the light emitting display section and the power source on the mother panel, and perform the aging process on the organic EL elements of all the light emitting display sections collectively. This is preferable.

However, when a variety of small-quantity production is required, in order to improve productivity and reduce manufacturing costs, the mother panel is provided with a plurality of types of light-emitting display units having different areas of the organic EL elements (light-emitting pixels). The following problems occur during the aging process. That is, the energy (hereinafter referred to as repair energy P) acting on the defective part in the aging process is as follows.
P = a ・ C ・ V ²
Where a is a panel constant determined by the number of dots and wiring resistance, C is a capacitance determined by the area of the organic EL element, and V is a reverse bias voltage. Therefore, if the same repair energy P is obtained for each of a plurality of types of the light emitting display units having different areas of the organic EL elements, the voltage value to be applied is changed according to the area of the organic EL elements. There is a problem in that the aging process cannot be collectively performed on a plurality of types of the light emitting display portions formed on one mother panel.

  The present invention has been made in view of the above-described problems, and in the manufacturing process of an organic EL panel, a plurality of types of light-emitting display units having different areas of organic EL elements are formed on a single mother panel. It is another object of the present invention to provide a mother panel and an organic EL panel manufacturing method capable of performing an aging process on each of the light emitting display portions collectively.

In order to solve the above-described problems, the present invention provides a plurality of light-emitting display portions each having a plurality of light-emitting pixels formed by sandwiching a functional layer including at least an organic light-emitting layer between an anode and a cathode on a base substrate. A first light-emitting display unit having a first light-emitting pixel as the light-emitting pixel, and a second light-emitting pixel having a smaller area than the first light-emitting pixel. An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display portions, and forming a second light emitting display portion having light emitting pixels on the base substrate; A cathode conduction line for electrically connecting the cathodes of the first and second light emitting display units and the power source is formed on the base substrate, and the cathode conduction lines are formed on the first and second cathodes . The cathode and the power source of the second light emitting display section Individual plurality of resistor portions, it and a connecting portion connecting the same of the second bundling a plurality of the cathode of the light emitting display, the cathode of the first light-emitting display portion which is formed between the can Is connected to the cathode conduction line via the resistance portion, the connection portion is connected to the cathode conduction line via the resistance portion, and is aged with a voltage value capable of repairing the first light emitting pixel by the power source. A repair energy capable of repairing the second light-emitting pixel is obtained during processing.

  In addition, the cathode conduction line is connected to both ends of the cathode of the second light emitting display unit.

In order to solve the above-described problems, the present invention provides a plurality of light-emitting display portions each having a plurality of light-emitting pixels formed by sandwiching a functional layer including at least an organic light-emitting layer between an anode and a cathode on a base substrate. A first light-emitting display unit having a first light-emitting pixel as the light-emitting pixel, and a second light-emitting pixel having a smaller area than the first light-emitting pixel. An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display portions, and forming a second light emitting display portion having light emitting pixels on the base substrate; Cathode conduction lines for electrically connecting the cathodes of the first and second light emitting display units and the power source are formed on the base substrate, and the first and second light emitting display units The cathodes are individually connected to the cathode conduction lines Is, the cathode of a different said first light emitting display unit is not connected to each other, the connection wiring portion for connecting different ones of the second light-emitting display portion of the cathode a plurality each other are formed on the base substrate, by the power supply When the aging process is performed with a voltage value capable of repairing the first light emitting pixel, repair energy capable of repairing the second light emitting pixel is obtained.

  The anodes and cathodes of the first and second light emitting display portions are formed in a plurality of lines so as to cross each other.

In order to solve the above-described problems, the present invention forms a plurality of light emitting display portions having a plurality of light emitting pixels in a row on a base substrate by sandwiching at least a functional layer including an organic light emitting layer between an anode and a cathode. An organic EL panel manufacturing method for obtaining an individual organic EL panel by cutting the mother panel according to each of the light emitting display units, wherein the first light emitting pixel is used as the light emitting pixel as the light emitting display unit. A first light-emitting display portion having a second light-emitting display portion having a second light-emitting pixel smaller in area than the first light-emitting pixel as the light-emitting pixel, and An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display sections, and electrically connecting the cathode and the power source of the first and second light emitting display sections. A cathode conduction line for the aforesaid Was formed over the scan on the substrate, comprising the step of an aging treatment at repairable voltage value the first light emitting pixel by the power source, the cathode conduction line, the first, the second light-emitting display portion A plurality of resistance portions formed between a cathode and the power source; and a connection portion for connecting and connecting a plurality of the cathodes of the same second light emitting display portion , the first light emission the cathode of the display portion through the resistor portion individually connected to said cathode conduction line, the first during the aging process in Rukoto the connecting portion is connected to the cathode conduction line through the resistor portion A repair energy capable of repairing the second light emitting pixel is obtained.

  In addition, the cathode conduction line is connected to both ends of the cathode of the second light emitting display unit.

In order to solve the above-described problems, the present invention forms a plurality of light emitting display portions having a plurality of light emitting pixels in a row on a base substrate by sandwiching at least a functional layer including an organic light emitting layer between an anode and a cathode. An organic EL panel manufacturing method for obtaining an individual organic EL panel by cutting the mother panel according to each of the light emitting display units, wherein the first light emitting pixel is used as the light emitting pixel as the light emitting display unit. A first light-emitting display portion having a second light-emitting display portion having a second light-emitting pixel smaller in area than the first light-emitting pixel as the light-emitting pixel, and An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display sections, and electrically connecting the cathode and the power source of the first and second light emitting display sections. A cathode conduction line for the aforesaid Was formed over the scan on the substrate, comprising the step of an aging treatment at repairable voltage value the first light emitting pixel by the power supply, the first, the cathode of the second light-emitting display element is the cathode individually Connected to a conduction line, the cathodes of the different first light emitting display portions are not connected to each other, and a connection wiring portion for connecting the cathodes of the different second light emitting display portions to each other is formed on the base substrate. Thus, a repair energy capable of repairing the second light-emitting pixel is obtained during the aging process.

  The anodes and cathodes of the first and second light emitting display portions are formed in a plurality of lines so as to cross each other.

  In the aging process, a reverse bias voltage is applied from the power source.

  In the manufacturing process of the organic EL panel, the present invention collectively applies to each of the light emitting display portions even when a plurality of types of light emitting display portions having different areas of the organic EL elements are formed on one mother panel. The aging process can be performed.

The figure which shows the mother panel in 1st embodiment of this invention. The principal part enlarged view which shows the 1st light emission display part in 1st embodiment same as the above. The principal part enlarged view which shows the 2nd light emission display part in 1st embodiment same as the above. The schematic cross section which shows the 2nd light emission display part in 1st embodiment same as the above. The figure which shows the manufacturing method of the organic electroluminescent panel in 1st embodiment same as the above. The figure which shows the mother panel in 2nd embodiment of this invention. The principal part enlarged view which shows the 2nd light emission display part in 2nd embodiment same as the above. The figure which shows the experimental result which compared the Example of this invention with the prior art example. The figure which shows the relationship between the voltage value of the aging process in the Example of this invention, and a prior art example, and repair energy.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a diagram showing a multi-panel mother panel in which a plurality of first and second light emitting display portions 2a and 2b are formed in a row on a base substrate 1, respectively. FIG. 2 is an enlarged view of a main part showing the first light-emitting display part 2 a arranged on the base substrate 1. FIG. 3 is an enlarged view showing a main part of the second light emitting display unit 2b arranged on the mother panel. FIG. 4 is a cross-sectional view of the main part showing the laminated structure of the second light emitting display portion 2b. Although not shown in the cross-sectional view, the first light emitting display portion 2a also has the same laminated structure as the second light emitting display portion 2b.

  The base substrate 1 is an electrically insulating substrate made of a rectangular transparent glass material. On the base substrate 1, a plurality of first and second light emitting display portions 2a and 2b, a first conduction line (anode conduction line) 3, and a second conduction line (cathode conduction line) 4 are formed. Has been. A sealing substrate that covers the first and second light emitting display portions 2a and 2b in an airtight manner is disposed on the base substrate 1, but the sealing substrate is omitted in FIGS. Yes.

  As shown in FIGS. 2 to 4, the first and second light emitting display portions 2 a and 2 b include a plurality of anodes 5 formed in a line, insulating layers 6, partition walls 7, functional layers 8, and lines. A plurality of cathodes 9 formed in a plurality of shapes, and each of the anodes 5 and the cathodes 9 intersects with each other, and a plurality of first and second electrodes are formed by sandwiching the functional layer 8 between the anodes 5 and the cathodes 9. This is a so-called passive matrix light-emitting display unit including two light-emitting pixels (organic EL elements). Each cathode 9 is connected to the cathode wiring portion 10. Further, the first and second light emitting display portions 2a and 2b are hermetically covered with a sealing substrate 11 as shown in FIG. The first and second light emitting display portions 2a and 2b are light emitting display portions having different sizes, and the area of the second light emitting pixel provided in the second light emitting display portion 2b is the first light emitting display portion. It is assumed to be smaller than the first light emitting pixel provided in 2a.

  The first conductive line 3 is made of, for example, a conductive material such as ITO, chromium (Cr) or aluminum (Al) or a laminate of these conductive materials, and an external power source for aging treatment in the manufacturing process of the organic EL panel (not shown) ) And the respective anodes 5 of the first and second light emitting display portions 2a and 2b, which apply a voltage supplied from the external power source to the respective anodes 5. is there. The first conduction line 3 includes a first limiting resistance portion 3 a formed between the external power source and each anode 5. The first limiting resistor portion 3a is a ladder resistor, for example, for adjusting the voltage applied from the first conductive line 3 to each anode 5 to prevent the destruction of each light emitting pixel. The first limiting resistor 3a is separated from each anode 5 when the mother panel is cut into individual organic EL panels in the manufacturing process of the organic EL panel described later, and the resistance value and the form of connection are respectively It may be different individually. A first power connection terminal 3b for electrically connecting to the external power supply is provided at the end of the first conduction line 3.

  Further, as shown in FIG. 3, the first conductive line 3 is formed between each anode 5 and the first limiting resistor portion 3a in the second light emitting display portion 2b, and connects a plurality of anodes 5 to each other. It has the 1st connection part 3c. In this embodiment, the 1st connection part 3c bundles two of each anode 5 of the 2nd light emission display part 2b, and connects them to the 1st 1st limiting resistance part 3a.

  The second conductive line 4 is made of, for example, a conductive material such as ITO, chromium (Cr) or aluminum (Al) or a laminate of these conductive materials, and the external power source and the first and second light emitting display portions 2a and 2b. Is a member for electrically connecting the cathodes 9 together via the cathode wiring portion 10 and is formed so as to be electrically disconnected from the first conductive line 3 and supplied from the external power source. The applied voltage is applied to each cathode 9. The second conduction line 4 has a second limiting resistance portion 4a formed between the external power source and each cathode 9. The second limiting resistor 4a is, for example, a ladder resistor, and adjusts the voltage applied to each cathode 9 from the second conductive line 4 to prevent destruction of each light emitting pixel. The second limiting resistor 4a is separated from each cathode 9 when the mother panel is cut into individual organic EL panels in the manufacturing process of the organic EL panel to be described later. It may be different individually. Further, a second power connection terminal 4b for electrically connecting to the external power source is provided at the end of the second conduction line 4.

  Further, as shown in FIG. 3, the second conduction line 4 is formed between each cathode 9 and the second limiting resistor 4a in the second light emitting display portion 2b, and connects the plurality of cathodes 9 to each other. It has the 2nd connection part (connection part) 4c. In this embodiment, the 2nd connection part 4c bundles four of each cathode 9 of the 2nd light emission display part 2b, and connects them to one 2nd limiting resistance part 4a.

  The anode 5 is made of a light-transmitting conductive material such as ITO. After the conductive material is formed in layers on the base substrate 1 by means of vapor deposition or sputtering, the anodes 5 are substantially parallel to each other by photolithography etching or the like. Thus, a plurality of lines are formed. Each anode 5 is connected to the first conduction line 3 on one side of the end (the lower side in FIG. 1).

  The insulating layer 6 is made of, for example, a polyimide-based electrically insulating material, and is formed on the anode 5 so as to be positioned between the anode 5 and the cathode 9, and prevents a short circuit between the electrodes 5 and 9. . The insulating layer 6 is formed with an opening 6a for defining each light emitting pixel and for clarifying the outline. The insulating layer 6 also extends between the cathode wiring portion 10 and the cathode 9, and has a contact hole 6 b that connects the cathode wiring portion 10 and the cathode 9.

  The partition wall 7 is made of, for example, a phenol-based electrically insulating material and is formed on the insulating layer 6. The partition wall 7 is formed by means such as a photolithography etching method so that the cross section thereof has a reverse taper shape with respect to the insulating layer 6. A plurality of partition walls 7 are formed at equal intervals in a direction orthogonal to the anode 5. The partition wall 7 has a structure in which the functional layer 8 and the metal film are cut in a line shape when a metal film to be the functional layer 8 and the cathode 9 is formed from above by a vapor deposition method, a sputtering method, or the like.

  The functional layer 8 is formed on the anode 5 and has at least an organic light emitting layer. In the present embodiment, the functional layer 8 is formed by sequentially laminating a hole injection layer, a hole transport layer, an organic light emitting layer, and an electron transport layer by means of vapor deposition or sputtering.

  The cathode 9 is formed in a line so that a metallic conductive material having a higher conductivity than the anode 5 such as aluminum (Al) or magnesium silver (Mg: Ag) intersects the anode 5 by means such as sputtering or vapor deposition. A plurality are formed. The cathode 9 is formed by separating a metal film formed of the conductive material into a layer which is cut by the partition wall 7 and is stacked on the functional layer 8 and a layer stacked on the partition wall 7. The cathode 9 is connected to the cathode wiring part 10 through a contact hole 6 b provided in the insulating layer 6, and is connected to the second conductive line 4 through the cathode wiring part 10.

  The cathode wiring part 10 is made of, for example, a conductive material such as ITO, chromium (Cr) or aluminum (Al), which is the same material as the anode 5, or a laminate of these conductive materials. The cathode wiring portion 10 is formed such that at least an end portion to be connected to the cathode 9 is located below the cathode 9 via the insulating layer 6 so that the cathode wiring portion 10 can be connected to the cathode 9 via the contact hole 6b. Yes. As shown in FIG. 3, in the second light-emitting display portion 2b, contact holes 6b and cathode wiring portions 10 are formed on both ends of the cathode 9, and each cathode 9 of the second light-emitting display portion 2b. Are connected to the second conductive line 4 at both ends.

  The sealing substrate 11 is made of, for example, a glass material, and includes a plurality of recesses 11a that accommodates the first and second light emitting display portions 2a and 2b, and a joint formed so as to surround the entire periphery of the recess 11a. 11b and disposed on the base substrate 1 via an adhesive 11c. The sealing substrate 11 is a multi-surface sealing substrate for later cutting together with the mother panel to form individual sealing members.

  A mother panel for manufacturing a plurality of organic EL panels is constituted by the above-described parts.

  Next, a method for manufacturing an organic EL panel using a mother panel will be described with reference to FIG.

  First, in the light emitting display portion forming step S1, a light-transmitting conductive material is formed on the base substrate 1 by means of vapor deposition or sputtering, and then the anode 5 is formed by photolithography etching or the like. At the same time or later, the first and second conductive lines 3 and 4 are formed on the base substrate 1 by the same method. Then, the insulating layer 6, the partition wall portion 7 and the functional layer 8 are laminated so as to correspond to the anode 5, and further, the cathode 9 is laminated on the functional layer 8, so that the first and second light emitting pixels are formed. The first and second light emitting display portions 2a and 2b are formed.

  Next, in the sealing step S2, the sealing substrate 11 is disposed on the base substrate 1 via the ultraviolet curable adhesive 11c so as to accommodate the first and second light emitting display portions 2a and 2b individually. Fix it. Thereby, a mother panel capable of producing a plurality of organic EL panels is obtained.

  Next, in the aging treatment step S3, the first and second conductive lines 3 and 4 are connected to the external power source, and a voltage is applied between the first and second conductive lines 3 and 4 for a predetermined time. Aging process that destroys and removes defective parts to repair the first and second light emitting pixels of the first and second light emitting display portions 2a and 2b and stabilizes element characteristics by suppressing temporal change in light emission luminance. I do. In the aging process, it is preferable that applying a reverse bias voltage does not deteriorate the organic materials constituting the first and second light emitting pixels due to light emission.

  The aging process is performed with a voltage value capable of repairing the first light emitting pixels of the first light emitting display section 2a. Here, in the passive matrix light emitting display portion, the repair energy P is determined mainly due to the combined capacity of the light emitting pixels connected to the cathode facing the defective portion. Conventionally, in the second light emitting display unit having the second light emitting pixel having a smaller area than the first light emitting pixel, the voltage value capable of repairing the first light emitting pixel is used as the reference of the aging process. Repair energy P is insufficient and repair is not performed sufficiently. On the other hand, the inventor of the present application combined the second light emitting display portion 2b by increasing the number of cathodes 9 connected to one second limiting resistance portion 4a as compared with the first light emitting display portion 2a. It has been found that a repairing energy P capable of repairing the second light emitting pixel can be obtained within a voltage value range in which the capacity can be increased and the first light emitting pixel can be repaired in the aging process. Since the anode 5 has a higher resistance value than the cathode 9, the contribution to the repair energy P due to the combined capacity of the light emitting pixels connected to the anode 5 facing the defective portion is low, but as in the present embodiment, the second Further increase in the repair energy P can be expected by increasing the number of anodes 5 connected to one first limiting resistor 3a in the light emitting display 2b as compared with the first light emitting display 2a.

  In addition, the repair energy P tends to be large on the voltage application side of the cathode 9, that is, on the connection side with the second conduction line 4, and decrease as the distance from the connection side increases. Therefore, as in the present embodiment, in the second light emitting display portion 2b, each cathode 9 is connected to the second conduction line 4 at both ends thereof, thereby increasing the minimum value of the repair energy P and repairing. The aging process can be performed at a lower voltage value while suppressing variations in energy P.

  Next, in the inspection step S4, a predetermined voltage in the forward direction is applied to turn on the first and second light emitting display portions 2a and 2b, and the first and second light emitting display portions 2a and 2b are turned on. Judge the quality. In addition, inspection process S4 may be performed simultaneously with aging treatment process S5.

  In the cutting step S5, the base substrate 1 and the sealing substrate 11 are cut by means such as a scribe method according to the first and second light emitting display portions 2a and 2b. At this time, the first and second conductive lines 3 and 4 are separated from the respective anodes 5 and the respective cathodes 9. The sealing substrate 11 is provided with each anode 5 in order to be electrically connected to a flexible printed wiring (not shown) via a connecting member such as an anisotropic conductive film in a state where individual organic EL panels are obtained. And a second recess (not shown) corresponding to the end of each cathode wiring portion 10 is formed. In the cutting step S5, the second recess is cut to end each anode 5 and each cathode wiring portion 10. Expose the part.

  Through the above steps, a first organic EL panel having the first light emitting display portion 2a and a second organic EL panel having the second light emitting display portion 2b are obtained.

  In this mother panel and a method for manufacturing an organic EL panel using the mother panel, the second conductive line 4 is wired so as to connect a plurality of cathodes 9 of the second light emitting display portion 2b to each other. When the aging process is performed with a voltage value capable of repairing the light emitting pixel, a repair energy P capable of repairing the second light emitting pixel is obtained. As a result, even when a plurality of types of light emitting display portions 2a and 2b having different areas of light emitting pixels are formed on a single mother panel, the aging process is collectively performed on each light emitting display portion 2a and 2b. It becomes possible to improve the productivity of the organic EL panel.

  Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the part same as the above-mentioned 1st embodiment, or an equivalent part, and the detailed description is abbreviate | omitted.

  The second embodiment differs from the first embodiment described above in that, as shown in FIGS. 6 and 7, each cathode 9 in the second light emitting display portion 2b is individually connected to the second limiting resistance portion 4a and The connection wiring portion 4d is formed so as to connect the cathodes 9 of the two second light emitting display portions 2b that are connected to the second conduction line 4 and are adjacent in the vertical direction in the drawing. .

  The connection wiring portion 4d is formed as a part of the second conductive line 4, and one end is connected to the cathode 9 of the second light emitting display portion 2b through the contact hole 6b, and the other end is connected. It is connected to the cathode 9 of the other second light emitting display portion 2b.

  Also with this configuration, as in the first embodiment described above, the combined capacity of the second light emitting pixels connected to the cathode 9 facing the defective portion in the aging process is increased, and the first capacity in the aging process is increased. Even when a voltage is applied within a range in which one light emitting pixel can be repaired, the repair energy P that can repair the second light emitting pixel can be obtained.

Examples of the present invention will be further described below. First, as an evaluation method, whether or not the organic EL element has been repaired by the aging treatment (whether the defective portion has been destroyed or removed) is determined by a destruction trace formed by the aging treatment (hereinafter referred to as a repair trace). Judgment can be made by whether or not it is done. If the anode and the cathode are not in contact with each other when the repair mark is formed, the repair is successful, and no display defect due to a short circuit or the like is caused. Further, since the repair mark becomes a so-called pinhole that becomes a non-light emitting portion, it is necessary that the pinhole has a size that cannot be recognized with the naked eye. If the size of the pinhole is 20 μm or less, it can be said that the display quality of the organic EL panel is not deteriorated. As an evaluation standard, a mother panel A in which a plurality of passive matrix light emitting display portions for obtaining an organic EL panel having a panel size of 2.1 inches was prepared. The light emitting display unit is configured with a dot size of 0.4 × 0.4 mm, a number of light emitting pixels of 32 × 128, 32 scanning lines (cathode), 128 signal lines (anode), a functional layer thickness of 200 nm, and a cathode thickness of 100 nm. Then, the first and second conducting lines for collectively performing the aging treatment with the first and second limiting resistance portions having a resistance value of 10 kΩ are connected to each anode and each cathode. One anode and one cathode are connected to each of the first and second limiting resistance portions. The aging process of applying a reverse bias voltage of 30 V at a high temperature of about 100 ° C. was performed on the mother panel A. At this time, as shown in FIG. 8, each light-emitting display unit is generated with a repair mark due to self-repair having an appropriate distribution in the light-emitting display part, and the repair mark occurrence rate is about 0.03 / mm ² . There was no short circuit. This is due to the fact that the restoration has been carried out sufficiently. Further, the repair mark size was about 10 μm, and the display quality was not affected. Hereinafter, as an evaluation method of the conventional example and the example, whether or not the repair mark occurrence rate is compared with the evaluation standard, whether or not the short circuit occurs and whether or not the repair mark size does not affect the display quality. Judged.

As a conventional example, a mother panel B was manufactured in which a plurality of first and second light emitting display portions having different sizes were arranged. The first light-emitting display unit is for obtaining a first organic EL panel having a panel size of 2.0 inches, a dot size of 0.35 × 0.35 mm, a dot pitch of 0.39 × 0.39 mm, Number of light emitting pixels (first light emitting pixels) 64 × 128, scanning line (cathode) 64 lines, signal line (anode) 128 lines, functional layer thickness 100 nm, cathode thickness 100 nm, capacitance of one light emitting pixel 0. The first and second conductive lines are collectively connected to the first and second limiting resistors having a resistance value of 5 kΩ and connected to the anodes and the cathodes. One anode and one cathode are connected to one first and second limiting resistor portions. The second light emitting display unit is for obtaining a second organic EL panel having a panel size of 1.5 inches, and has a dot size of 0.25 × 0.25 mm, a dot pitch of 0.27 × 0.27 mm, Number of light emitting pixels (second light emitting pixels) 64 × 128, scanning line (cathode) 64 lines, signal line (anode) 128 lines, functional layer thickness 100 nm, cathode thickness 100 nm, capacitance of one light emitting pixel 0. The first and second conduction lines are connected to the respective anodes and the respective cathodes by first and second limiting resistance portions having a resistance value of 5 kΩ. One anode and one cathode are connected to one first and second limiting resistor portions. The mother panel B was subjected to an aging process in which a reverse bias voltage of 25 V was applied at a high temperature of about 100 ° C. As a result of performing the test by the above-described evaluation method, in the mother panel B, as shown in FIG. 8, the first light emitting display portion has a repair mark generation rate of 0.03 / mm ² , and a short circuit occurs. The repair mark size is about 10 μm, and it is sufficiently repaired and does not affect the display quality. However, the second light emitting display portion has a repair mark generation rate of 0.01 / mm ² or less. At the same time, a short circuit developed, and the repair mark size was about 1 to 3 μm. Although there was no effect on the display quality, the repair was not sufficiently performed.

Further, the range of the repair energy P suitable for repair has an upper limit value and a lower limit value. When the repair energy P is lower than the lower limit value, repair is insufficient and short-circuit occurs. The size exceeds 20 μm and affects the display quality. The upper limit value and the lower limit value are determined mainly by the functional layer thickness and the cathode thickness. From the experiments by the inventors of the present application, for an organic EL element having a functional layer thickness of 200 nm and a cathode thickness of 100 nm, such as the light emitting pixel of the mother panel A, the upper limit value of a suitable repair energy P is 9 × 10 ⁻⁷ J It is known that the lower limit is 5 × 10 ⁻⁷ J. Similarly, for an organic EL element having a functional layer thickness of 100 nm and a cathode thickness of 100 nm, such as the first and second light emitting pixels of the mother panel B, a suitable upper limit value of the repair energy P is 2.5 × 10. ^{It is −7} J, and the lower limit is known to be 1.8 × 10 ⁻⁷ J. FIG. 9 shows a result of trial calculation of a voltage value for obtaining a suitable repair energy P for the mother panel B. As a result of the trial calculation, it was 22 to 26 V for the first light emitting display portion, and 27 to 31 V for the second light emitting display portion. Accordingly, in the trial calculation, it was found that the aging process cannot be performed on the first and second light emitting display portions at the same voltage value in the conventional example.

As a first example, a mother panel C was manufactured in which a plurality of first and second light emitting display portions 2a and 2b having different sizes were arranged in accordance with the first embodiment described above. The first light emitting display portion 2a is the same as that of the conventional example except that the first connecting portion 3c bundles two anodes 5 together and connects them to one first limiting resistor portion 3a. The light emitting display portion was formed in the same manner. The second light emitting display portion 2b is the same as the conventional example except that the four cathodes 9 are bundled together and connected to one second limiting resistor portion 4a at the second connection portion 4c. It formed similarly to the 2 light emission display part. The mother panel C was subjected to an aging process in which a reverse bias voltage of 25 V was applied at a high temperature of about 100 ° C. As a result of testing by the above-described evaluation method, in the mother panel C, as shown in FIG. 8, the first light-emitting display portion 2a has a repair mark occurrence rate of 0.03 / mm ² , and a short circuit occurs at all. Without repair, the repair mark size was about 10 μm, and it was sufficiently repaired and the display quality was not affected. Similarly, the second light emitting display portion 2b has a repair mark generation rate of 0.03 / mm ² , no short circuit occurs, the repair mark size is about 5 to 8 μm, and is fully repaired. There was no effect on display quality.

  Further, FIG. 9 shows a result of trial calculation of a voltage value for obtaining a suitable repair energy P for the mother panel C. As a result of the trial calculation, it was 22 to 26 V for the first light emitting display portion 2 a and 25 to 29 V for the second light emitting display portion 2 b. Therefore, in the trial calculation, the results were obtained that the first and second light emitting display portions 2a and 2b could be collectively subjected to the aging process with the same voltage value (25 to 26V).

As a second example, a mother panel D was manufactured in which a plurality of first and second light emitting display portions 2a and 2b having different sizes were arranged in accordance with the second embodiment described above. The first light emitting display portion 2a is the same as that of the conventional example except that the first connecting portion 3c bundles two anodes 5 together and connects them to one first limiting resistor portion 3a. The light emitting display portion was formed in the same manner. The second light emitting display portion 2b is the second light emitting display portion of the conventional example except that the cathodes 9 of the two second light emitting display portions 2b adjacent in the vertical direction are connected to each other by the connection wiring portion 4d. Formed in the same manner. The mother panel D was subjected to an aging process in which a reverse bias voltage of 25 V was applied at a high temperature of about 100 ° C. As a result of performing the test by the above-described evaluation method, in the mother panel D, as shown in FIG. 8, the first light emitting display portion 2a has a repair mark occurrence rate of 0.03 / mm ² , and a short circuit occurs at all. Without repair, the repair mark size was about 10 μm, and it was sufficiently repaired and the display quality was not affected. Similarly, for the second light emitting display portion 2b, the repair mark occurrence rate is about 0.03 to 0.04 / mm ² , no short circuit occurs, and the repair mark size is about 6 to 10 μm. It was fully repaired and the display quality was not affected.

  Further, FIG. 9 shows a result of trial calculation of a voltage value for obtaining a suitable repair energy P for the mother panel D. As a result of the trial calculation, it was 22 to 26V for the first light emitting display portion 2a and 23.5 to 27V for the second light emitting display portion 2b. Therefore, in the trial calculation, the results were obtained that the first and second light emitting display portions 2a and 2b could be collectively subjected to the aging process with the same voltage value (23.5 to 26V).

  Also according to the experimental results, by applying the present invention, it is possible to collectively perform aging processing on a plurality of types of light-emitting display units having different sizes, thereby improving the productivity of the organic EL panel. Obviously we can do it.

  The present invention is suitable for a method for manufacturing a mother panel and an organic EL panel.

DESCRIPTION OF SYMBOLS 1 Base substrate 2a 1st light emission display part 2b 2nd light emission display part 3 1st conduction | electrical_connection line 3a 1st limiting resistance part 3b 1st power supply connection terminal 3c 1st connection part 4 2nd conduction | electrical_connection line 4a 2nd limiting resistance part 4b 2nd power supply connection part 4c 2nd connection part 4d Connection wiring part 5 Anode 6 Insulating layer 7 Partition 8 Functional layer 9 Cathode 10 Cathode wiring part 11 Sealing substrate

Claims (9)

A mother panel in which a plurality of light emitting display portions having a plurality of light emitting pixels formed by sandwiching at least a functional layer including an organic light emitting layer between an anode and a cathode are formed in a row on a base substrate,
As the light emitting display portion, a first light emitting display portion having a first light emitting pixel as the light emitting pixel, and a second light emitting pixel having a second light emitting pixel having a smaller area than the first light emitting pixel as the light emitting pixel. A light emitting display portion on the base substrate,
An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display units, and an electrical connection between the cathode and the power source of the first and second light emitting display units. Forming a cathode conduction line for connection on the base substrate;
The cathode conduction line is formed by bundling a plurality of resistance parts formed between the cathodes of the first and second light emitting display parts and the power source, and a plurality of the cathodes of the same second light emitting display part. becomes a connecting portion for connecting Te, wherein the cathode of the first light emitting display unit which is connected with the cathode conduction line through the resistor portion individually, said connecting portion through the resistor portion cathode A mother panel which is connected to a conduction line and obtains repair energy capable of repairing the second light emitting pixel when the aging process is performed with a voltage value capable of repairing the first light emitting pixel by the power source. The mother panel according to claim 1, wherein the cathode conduction line is connected to both ends of the cathode of the second light emitting display unit. A mother panel in which a plurality of light emitting display portions having a plurality of light emitting pixels formed by sandwiching at least a functional layer including an organic light emitting layer between an anode and a cathode are formed in a row on a base substrate,
As the light emitting display portion, a first light emitting display portion having a first light emitting pixel as the light emitting pixel, and a second light emitting pixel having a second light emitting pixel having a smaller area than the first light emitting pixel as the light emitting pixel. A light emitting display portion on the base substrate,
An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display units, and an electrical connection between the cathode and the power source of the first and second light emitting display units. Forming a cathode conduction line for connection on the base substrate;
The cathodes of the first and second light emitting display units are individually connected to the cathode conduction line,
The cathodes of the different first light emitting display portions are not connected to each other,
When a plurality of connection wiring portions for connecting the cathodes of the different second light emitting display portions to each other are formed on the base substrate, the first light emitting pixels are aged with a voltage value that can be repaired by the power source. A mother panel characterized in that a repair energy capable of repairing the second light emitting pixel is obtained. 4. The mother panel according to claim 1, wherein a plurality of the anodes and the cathodes of the first and second light emitting display portions are formed in a line so as to intersect each other. 5. A mother panel in which a plurality of light-emitting display portions each having a plurality of light-emitting pixels formed by sandwiching at least a functional layer including an organic light-emitting layer between an anode and a cathode is formed in a row on a base substrate is provided in each of the light-emitting display portions. A method for producing an organic EL panel, which is cut according to an individual organic EL panel,
As the light emitting display portion, a first light emitting display portion having a first light emitting pixel as the light emitting pixel, and a second light emitting pixel having a second light emitting pixel having a smaller area than the first light emitting pixel as the light emitting pixel. A light emitting display portion on the base substrate,
An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display units, and an electrical connection between the cathode and the power source of the first and second light emitting display units. Forming a cathode conduction line for connection on the base substrate;
Aging treatment with a voltage value capable of repairing the first light emitting pixel by the power source,
The cathode conduction line bundles a plurality of resistance portions formed between the cathodes of the first and second light emitting display portions and the power source, and a plurality of the cathodes of the same second light emitting display portion. is formed to include a connecting portion connecting Te, wherein the cathode of the first light-emitting display portion connected to the cathode conduction line through the resistor portion individually, the connecting portion through the resistor portion method of manufacturing an organic EL panel, characterized in that to obtain a repairable repair energy the second light emitting pixels during the aging process in Rukoto is connected to the cathode conduction line. 6. The method of manufacturing an organic EL panel according to claim 5, wherein the cathode conduction line is connected to both ends of the cathode of the second light emitting display unit. A mother panel in which a plurality of light-emitting display portions each having a plurality of light-emitting pixels formed by sandwiching at least a functional layer including an organic light-emitting layer between an anode and a cathode is formed in a row on a base substrate is provided in each of the light-emitting display portions. A method for producing an organic EL panel, which is cut according to an individual organic EL panel,
As the light emitting display portion, a first light emitting display portion having a first light emitting pixel as the light emitting pixel, and a second light emitting pixel having a second light emitting pixel having a smaller area than the first light emitting pixel as the light emitting pixel. A light emitting display portion on the base substrate,
An anode conduction line for electrically connecting the anode and the power source of the first and second light emitting display units, and an electrical connection between the cathode and the power source of the first and second light emitting display units. Forming a cathode conduction line for connection on the base substrate;
Aging treatment with a voltage value capable of repairing the first light emitting pixel by the power source,
The cathodes of the first and second light emitting display units are individually connected to the cathode conduction line,
The cathodes of the different first light emitting display portions are not connected to each other,
A connection wiring portion that connects a plurality of the cathodes of the different second light emitting display portions to each other is formed on the base substrate, thereby obtaining repair energy capable of repairing the second light emitting pixels during the aging process. An organic EL panel manufacturing method characterized by the above. 8. The organic EL panel according to claim 5, wherein the anode and the cathode of the first and second light emitting display portions are formed in a plurality of lines so as to cross each other. Production method. 8. The method of manufacturing an organic EL panel according to claim 5, wherein a reverse bias voltage is applied from the power source in the aging process.

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