JP2007149971A - Organic el display unit, substrate therefor, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent adjacent organic EL panels, etc. from being damaged due to a short-circuited pixel when an aging processing is collectively performed for a plurality of organic EL panels. <P>SOLUTION: All sets of anode drawing wiring 11 connected to one organic EL panel 10 are once connected to a wiring 21 for anode aging. Near a portion (A portion) connected to a first common wiring 22 for anode aging in the wiring 21 for the anode aging, the wiring 21 for the anode aging has a narrow part where a wiring width is narrow. When there is a high possibility that defects (an interlayer short-circuit or the like) occur in the specific organic EL panel 10, the narrow part is cut in the wiring 21 for the anode aging connected to the organic EL panel 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a substrate for an organic EL display device capable of enhancing the effect of aging treatment, a manufacturing method thereof, and an organic EL display device.

  In an organic EL (electroluminescence) display device, an anode wiring connected to the anode or forming the anode itself, and a cathode wiring connected to the cathode or forming the cathode itself are opposed to each other, and Provided to intersect. An organic thin film (organic EL layer) is disposed between the anode wiring and the cathode wiring. The organic EL display device is a current-driven display device that emits light when a current is supplied to the organic thin film disposed between the anode wiring and the cathode wiring. The intersection of the anode wiring and the cathode wiring becomes a pixel. The organic EL element is formed of an anode wiring and a cathode wiring and an organic thin film existing between them. When the anode wiring side is set to the high voltage side and a predetermined voltage is applied between both electrode wirings to supply current to the organic thin film, light is emitted. Conversely, when the cathode wiring side is at a high potential, no current flows and no light is emitted.

  When a constant voltage is applied to the organic EL element, the light emission luminance greatly fluctuates due to a temperature change or a change with time. However, the variation of the light emission luminance of the organic EL element with respect to the current value is small. In order to obtain a predetermined display luminance, it is common to use a constant current driving method in which a constant current circuit is provided in a driving circuit and a constant current is supplied to each organic EL element.

  When manufacturing an organic EL display device, foreign matter such as dust is mixed in the organic EL layer arranged between the anode wiring and the cathode wiring, or a projection is generated in the anode wiring and the projection enters the organic EL layer. There are things to do. Then, during the actual operation of the organic EL display device, when charges are concentrated on the foreign matter or the like and heat is locally generated, the organic matter in the organic EL layer is decomposed. As a result, the organic material is finally torn together with the cathode wiring, causing a short circuit (interlayer short circuit) between the anode wiring and the cathode wiring. When a short circuit occurs, a charge may concentrate on the pixel in which the short circuit occurs during actual operation, and a phenomenon may occur in which the organic EL display device does not emit light.

  In order to avoid the occurrence of such a phenomenon during actual operation, a short-circuit aging process is performed in which a defective portion mixed with foreign matters is set in an insulating state which is an electrically open state or made non-conductive by oxidation in advance ( Hereinafter, it is referred to as aging processing) (for example, refer to Patent Document 1).

  In the method described in Patent Document 1, the aging process is performed by applying a pulsed DC voltage for a predetermined time from the current application device between the anode wiring and the cathode wiring. In the aging treatment, a reverse bias voltage (the cathode voltage is higher than the anode) is applied between the anode wiring and the cathode wiring. As a result, a current flows through a pixel having an abnormal point where a short circuit occurs or an abnormal point where a short circuit is likely to occur (hereinafter referred to as a short circuit point), and no current flows through a pixel which does not. Then, current concentrates at the short-circuit point, and the short-circuit point is oxidized or made nonconductive.

  Note that when the short-circuit point is oxidized or made nonconductive, the region near the short-circuit point does not emit light. However, since the short-circuit point is generally a minute region, it is difficult for the user to visually recognize it, and this does not cause a practical problem.

JP 2003-282253 A (paragraphs 0004-0007)

  When producing an organic EL display device using an organic EL display element (organic EL panel), generally, a plurality of organic EL panels are formed on a single large glass substrate. A general manufacturing process includes an organic EL element forming process for forming a wiring group and an organic EL layer on one glass substrate, and a counter substrate such as glass for each organic EL panel in order to protect the organic EL layer from moisture and the like. A sealing process for isolating from the outside air, a cutting process for cutting the glass substrate and separating it into a plurality of organic EL panels, an optical film attaching process for attaching an optical film such as a circularly polarizing plate to prevent reflection, and driving This is achieved by sequentially executing a mounting process of mounting an organic EL display device by mounting peripheral circuits such as circuits. In addition, the glass substrate in the state where the organic EL element forming step or the sealing step is finished is referred to as an organic EL display device substrate.

  The aging process is preferably performed before separation into a plurality of organic EL panels. This is because the aging process can be performed collectively on the plurality of organic EL panels. When aging processing is performed on a plurality of organic EL panels at once, if a pixel having a short circuit point (hereinafter referred to as a short circuit pixel) exists in a certain organic EL panel, a current flows concentrated on the short circuit point. Therefore, the current supplied to the other organic EL panel downstream from the voltage application device is reduced. Then, the aging process with respect to those organic electroluminescent panels may become inadequate.

  Furthermore, since a current flows concentrated on the short-circuit point, a large Joule heat is generated there. As a result, each pixel in a relatively large area around the short-circuited pixel in the organic EL panel may be damaged, or an adjacent organic EL panel may be damaged.

  In addition, although patent document 1 describes making both a short circuit point non-conductive and not destroying a surrounding pixel (for example, paragraph 0036-0037), generation | occurrence | production of Joule heat in a short circuit point is described. Therefore, the possibility of damaging the adjacent organic EL panel cannot be reduced.

  Therefore, the present invention can collectively perform aging processing on a plurality of organic EL panels and can reliably perform aging processing on each organic EL panel. An object of the present invention is to provide a substrate for an organic EL display device, a manufacturing method thereof, and an organic EL display device that can prevent the adjacent organic EL panel and the like from being damaged due to the damage.

  An organic EL display device substrate according to the present invention is an organic EL display device substrate in which a plurality of organic EL panels each including an anode wiring, an organic EL layer, and a cathode wiring are formed, and corresponds to each organic EL panel. Anode aging wiring connected to the anode lead wiring connected to the anode wiring in the organic EL panel, and electrically connected to each anode aging wiring, and for connecting the anode aging wiring to the aging device A common wiring for anode aging (for example, the first common wiring for anode aging 22 and the second common wiring for anode aging 23), which is a part of the wiring for anode aging, and is connected to the wiring for anode aging. A narrow part with a narrow line width is provided at the site where the anode routing wiring and the anode aging common wiring can be electrically separated. It is characterized in that is.

  The anode aging wiring may have a path that avoids the installation position of the sealing material for sealing the organic EL panel, and may be configured such that the narrow portion is provided in the path.

  Another embodiment of the organic EL display device substrate according to the present invention is an organic EL display device substrate in which a plurality of organic EL panels each including an anode wiring, an organic EL layer, and a cathode wiring are formed. And a cathode aging wiring connected to the cathode lead wiring connected to the cathode wiring in the organic EL panel, and the cathode aging wiring electrically connected to each cathode aging wiring. A cathode aging common wiring (for example, a first cathode aging common wiring 32 and a second cathode aging common wiring 33) for connecting to the cathode aging wiring, and a portion in the cathode aging wiring, The line width is narrow at the part where the cathode routing wiring connected to the wiring and the common wiring for cathode aging can be electrically separated. Wherein the narrow portion is provided.

  The cathode aging wiring may have a path that avoids the installation position of the sealing material for sealing the organic EL panel, and may be configured such that the narrow portion is provided in the path.

  A method for manufacturing an organic EL display device substrate according to the present invention is a method for manufacturing an organic EL display device substrate in which a plurality of organic EL panels each including an anode wiring, an organic EL layer, and a cathode wiring are formed. Corresponding to the EL panel, the anode aging wiring or cathode aging wiring connected to the anode wiring or cathode wiring connected to the anode wiring or cathode wiring in the organic EL panel is wired, and each anode aging wiring is connected. Or, it is electrically connected to the cathode aging wiring, and the anode aging wiring or the cathode aging common wiring for connecting the anode aging wiring or the cathode aging wiring to the aging device is wired, and the anode routing wiring or the cathode routing wiring. A part of the wiring, which is anode aging wiring or shadow A narrow portion having a narrow line width is provided in a portion where the anode routing wiring or cathode routing wiring connected to the aging wiring and the anode aging common wiring or the cathode aging common wiring can be electrically separated. .

  An organic EL display device according to the present invention includes an organic EL panel obtained by cutting the organic EL display device substrate.

  According to the present invention, when performing an aging process on a plurality of organic EL panels at once, an organic EL panel having a defect such as a shorted pixel can be easily excluded from the aging process target. It is possible to prevent the adjacent organic EL panel or the like from being damaged due to the above.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a plan view showing a substrate for an organic EL display device according to a first embodiment (Embodiment 1) of the present invention. Nine organic EL panels 10 are formed on the organic EL display device substrate 100 illustrated in FIG. All anode routing wires 11 drawn from the anodes of the respective organic EL panels 10 are connected to the anode aging wires 21. In FIG. 1, the three anode aging wirings 21 connected to the anode lead-out wirings 11 of the three organic EL panels 10 arranged in the vertical direction are connected to the first anode aging common wiring 22. Each of the first anode aging common wirings 22 is connected to the second anode aging common wiring 23.

  The line width of the first anode aging common wiring 22 is wider than the line width of the anode aging wiring 21. In the case where there are short-circuited pixels in the plurality of organic EL panels 10, a current flows through them. In this case, the current flowing through the first anode aging common wiring 22 rather than the current flowing through each anode aging wiring 21. Because there are more people. Further, the line width of the second anode aging common wiring 23 is wider than the line width of the first anode aging common wiring 22.

  Further, each cathode lead-out wiring 13 drawn from the cathodes of the three organic EL panels 10 arranged in the vertical direction in FIG. 1 is connected to the first cathode aging common wiring 32. Each of the first cathode aging common wirings 32 is connected to the second cathode aging common wiring 33.

  The line width of the second cathode aging common wiring 33 is wider than the line width of the first cathode aging common wiring 32. A short circuit in a plurality of organic EL panels 10 (three organic EL panels 10 arranged in the vertical direction in FIG. 1 are referred to as a left group, a middle group, and a right group, for example, one in the left group and one in the middle group). If pixels exist, current flows through them. In that case, the current flows through the first common cathode aging wirings 32 (for example, those corresponding to the left group and those corresponding to the middle group). This is because more current flows through the second cathode aging common wiring 33.

  In FIG. 1, for each organic EL panel 10, only one anode lead-out wiring 11 is assigned a reference numeral. Further, only one cathode lead wiring 13 is given a reference numeral. Further, in the example shown in FIG. 1, since nine anode routing wirings 11 are connected to the organic EL panel 10, there are nine anodes, and four cathode routing wirings 13 are connected to the organic EL panel 10. So there will be four cathodes, but the number is just an example. In the example shown in FIG. 1, nine organic EL panels 10 are formed in the organic EL display device substrate 100, but the number thereof is merely an example.

  FIG. 2 is a partially enlarged view showing a portion (A portion) indicated by A in FIG. 1 in an enlarged manner. As shown in FIG. 2, the anode aging wiring 21 has a narrow portion 211 in which the wiring width is narrow in the vicinity of the portion connected to the first anode aging common wiring 22 in the anode aging wiring 21. . In FIG. 1, one A portion is shown, but the narrow portion 211 is provided in all (9 in the example shown in FIG. 1) anode aging wiring 21. In the present embodiment, the narrow portion 211 is formed in the vicinity of the portion connected to the first anode aging common wiring 22, but the narrow portion 211 is the first in the anode aging wiring 21. Connection point of the anode lead-out wiring 11 (the rightmost one of the nine anode lead-out wirings 11 in each organic EL panel 10 in the plan view of FIG. 1) provided near the common anode aging wiring 22 of FIG. As long as it is closer to the first anode aging common wiring 22, it does not have to be in the vicinity of the portion connected to the first anode aging common wiring 22. However, when the narrow part 211 as a cutting part is provided in the vicinity of the part connected to the first anode aging common wiring 22, the cutting part is easily specified when cutting the narrow part 211. can do.

  It should be noted that the connection portion (indicated by B in FIG. 1) of the anode lead-out wiring 11 provided closest to the first anode aging common wiring 22 and the first anode aging common wiring 22 are connected. All the anode routing wirings 11 connected to the anode aging wiring 21 and the first anode aging common wiring 22 can be electrically separated from each other (shown by C in FIG. 1). It is a part.

  FIG. 3 is a process diagram for explaining an example of a method for manufacturing an organic EL display device using the organic EL display device substrate 100 of the present embodiment and the organic EL panel 10 obtained therefrom. In the process shown in FIG. 3, the organic EL display device protects the organic EL layer from moisture and the like, and an organic EL element formation process (step S <b> 1) for forming a wiring group and a plurality of organic EL layers on one glass substrate. Therefore, the sealing step (step S2) for isolating the organic EL display device from the outside air with a counter substrate such as glass, and the aging process is not performed on the organic EL panel 10 having a defect in the organic EL display device substrate 100 A defective panel separating step (step S3), an aging step (step S4) for performing an aging process for collectively aging all the organic EL panels 10, and a plurality of organic ELs by cutting the glass substrate. Cutting step (step S5) for separating into panel 10, and optical film pasting for pasting an optical film such as a circularly polarizing plate to prevent reflection And step (step S6), and through a mounting step of mounting the driver IC 8 (step S7), and the organic EL display device is manufactured.

  FIG. 4A is a plan view showing the cathode lead-out wiring 13, the first cathode aging common wiring 32, and the periphery thereof, and FIG. 4B is a cross-sectional view showing the BB cross section.

  In the organic EL element forming step of step S1 shown in FIG. 3, ITO is formed on a glass substrate, and the ITO is etched to form the anode wiring 1. Next, a metal film of Al or the like is formed, the metal film is etched, the anode routing wiring 11 (not shown in FIG. 4), the anode aging wiring 21 (not shown in FIG. 4), the first Anode aging common wiring 22 (not shown in FIG. 4), second anode aging common wiring 23 (not shown in FIG. 4), cathode routing wiring 13, first cathode aging common wiring 32 and second The common wiring 33 for cathode aging is formed.

  An insulating film 8 made of a photosensitive polyimide resin is applied on the member layer formed of a metal film. The insulating film 8 is a structure whose opening defines the light emitting region of the organic EL panel 10. Then, an insulating film hole 15 is formed in order to form an opening to be a light emitting portion of each pixel in the organic EL panel 10 by performing exposure development and the like. When the opening is formed in the organic EL panel 10, the insulating film 8 at a predetermined portion in the cathode lead-out wiring 13 is removed to form the insulating film hole 17.

  Further, after applying a negative type photosensitive resin (a portion exposed to light at the time of exposure) is applied, the partition 16 is formed by exposure and development. The formed barrier ribs 16 separate the cathode wirings 2 formed by vapor deposition in the subsequent process. Further, the cathode lead wiring 13 is also separated by the partition wall 16. The organic thin film 9 as the organic EL layer is laminated on the substrate on which the anode wiring 1 and the like are formed as described above. As the organic thin film 9, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer are sequentially formed. Finally, the cathode wiring 2 is formed of a metal such as aluminum by vapor deposition. The cathode wiring 2 is electrically connected to the cathode lead wiring 13 at the portion of the insulating film hole 17. Here, the partition walls are used to separate the respective cathode wirings 2, but the cathode wirings 2 may be separated by mask vapor deposition in stripes.

  When the organic EL element forming step is completed, each anode wiring 1 in the plurality of simple matrix type organic EL panels 10 formed on the glass substrate is used for anode aging on the glass substrate via the anode lead-out wiring 11. The cathode wiring 2 is electrically connected to the wiring 21, the first anode aging common wiring 22, and the second anode aging common wiring 23. Each cathode wiring 2 in the organic EL panel 10 is connected to the cathode routing wiring 13 on the glass substrate. Thus, an organic EL display substrate 100 having a structure electrically connected to the first cathode aging common wiring 32 and the second cathode aging common wiring 33 is formed.

  Next, in the sealing step of Step S2, in order to protect the organic EL layer formed on the glass substrate in the organic EL element forming step from moisture, another glass substrate as a second substrate is replaced with a glass substrate. The two glass substrates are bonded to each other with a sealing material as a gap material. Then, dry nitrogen gas is sealed in the sealed space formed by the two glass substrates and the sealing material.

  After passing through the defective panel separation process of step S3, an aging process is executed in the aging process of step S4. An aging voltage application device (aging device) is applied to the second anode aging common wire 23 and the second cathode aging common wire 33 in order to perform an aging process for the anode wire 1 and the cathode wire 2. Connecting. In the aging process, the voltage is applied so that the absolute value of the reverse bias (the cathode voltage is higher than the anode) is larger than the voltage value (absolute value) during actual driving.

  In the cutting step of step S5, the glass substrate is cut and separated into a plurality of organic EL panels 10. Next, an optical film such as a circularly polarizing plate is attached to the organic EL panel 10 in order to prevent reflection in the optical film attaching step of step S6. Then, in the mounting process of step S7, the film-like substrate on which the drive circuit is mounted is connected to the organic EL panel 10 to obtain an organic EL display device.

  What is characteristic in this embodiment is that a defective panel separation step (step S3) exists before the sealing step. A photomask is used when forming the insulating film holes 15 and 17 and the partition wall 16 and when forming the auxiliary wiring. The organic EL element of step S1 indicates that the photomask is contaminated and the contamination is generated. It may become apparent after the formation process is complete. In particular, it may be found that there is a high possibility that a defect (such as an interlayer short circuit) has occurred in a specific organic EL panel 10 due to contamination of the photomask. The auxiliary wiring is a wiring made of a metal film such as Al formed to lower the resistance value of the cathode wiring 1 formed using ITO. Further, the residue of the insulating film 8 when the insulating film holes 15 and 17 are formed, the residue when the partition 16 is formed, and the residue of the metal film such as Al when the auxiliary wiring is formed are portions where pixels are formed. If it remains, etc., defects such as interlayer short circuit will occur.

  Even if a defect is generated in a specific organic EL panel 10, if the aging process is performed on the organic EL panel 10 as it is, the other organic EL panel 10 may be adversely affected. is there. For example, when a short-circuited pixel occurs in a specific organic EL panel 10, a large Joule heat is generated in the short-circuited pixel, and the adjacent organic EL panel 10 is damaged.

  Therefore, it is preferable to exclude the specific organic EL panel 10 that is highly likely to have a defect from the target of the aging process. In the present embodiment, energization is performed in the aging process for the organic EL panel 10 that is known to have a defect and the specific organic EL panel 10 that is highly likely to have a defect in the defective panel separation process. Avoid doing it. That is, the specific organic EL panel 10 is electrically separated from the first anode aging common wiring 22. For example, a laser beam is irradiated from a laser processing machine to a predetermined part of the anode aging wiring 21, and the anode aging wiring 21 connected to the specific organic EL panel 10 is cut at the predetermined part. The predetermined portion is a position where all the anode routing wirings 11 connected to the organic EL panel 10 are electrically separated from the first anode aging common wiring 22.

  In the present embodiment, as illustrated in FIG. 2, the narrow portion 211 is provided in the anode aging wiring 21. Therefore, if the narrow portion 211 as a predetermined portion is cut by irradiating the laser beam, the cutting operation is completed in a shorter time compared to the case of cutting other portions in the anode aging wiring 21. Therefore, the process time for manufacturing the organic EL display device is shortened.

  FIG. 5 is an explanatory view showing a state of cutting by irradiating a laser beam. In FIG. 5, four circles 301 indicate laser beam irradiation locations. For example, when the line width of the anode aging wiring 21 (excluding the narrow portion 211) is 2 mm, the width is narrow considering the ease of cutting and the degree of voltage drop in the anode aging wiring 21 in the aging process. The line width of the portion 211 is preferably about 1 mm. In that case, if the diameter of the laser beam irradiated from the laser processing machine is about 250 μm, the narrow portion 211 can be cut by irradiating the laser beam four times.

  Further, in the present embodiment, all the anode routing wirings 11 connected to one organic EL panel 10 are once connected to one anode aging wiring 21. In other words, each anode aging wiring 21 is installed independently. Note that “independent” means not affected by the other anode aging wiring 21. That is, even if the other anode aging wiring 21 is cut or the like, it is not affected at all. Each anode aging wiring 21 is connected to a voltage application device used during the aging process via the first anode aging common wiring 22 and the second anode aging common wiring 23. Therefore, if the anode aging wiring 21 is not electrically connected to the first anode aging common wiring 22, the anode aging wiring 21 is connected to the anode aging wiring 21 via the anode routing wiring 11. On the other hand, current cannot be supplied from the voltage application device. That is, with the organic EL panel 10 excluded, the other organic EL panels 10 can be collectively subjected to aging processing.

  Thus, in this embodiment, the wiring for aging treatment (the anode aging wiring 21, the first anode aging common wiring 22 and the second anode aging common wiring 23) is the anode aging wiring 21. Is formed so that the specific organic EL panel 10 is not subjected to the aging process, and the anode aging wiring 21 is provided with the narrow portion 211. As a result, it is possible to perform an aging process on other organic EL panels 10 in a state where the specific organic EL panel 10 is excluded, and to apply the voltage to the specific organic EL panel 10 in a short time. It is possible to set to a state where it is impossible to energize from.

  In the present embodiment, as illustrated in FIG. 2, the narrow portion 211 is formed by providing a rectangular recess on one side of the two long sides (sides orthogonal to the width direction) of the anode aging wiring 21. Although formed, the shape of the narrow portion 211 is not limited to the shape illustrated in FIG.

  For example, you may make it illustrate to FIG. 6 (A)-(D). In the example shown in FIG. 6A, in the anode aging wiring 21, a narrow portion 211A is formed by providing a plurality of wiring non-formed portions (white portions in FIG. 6A) in the width direction. In the example shown in FIG. 6B, the narrow portion 211 </ b> B is formed by providing a substantially semicircular recess on each of the two long sides of the anode aging wiring 21. In the example shown in FIG. 6C, the narrow portion 211 </ b> C is formed by providing a part of an elliptical concave portion on one side of the two long sides of the anode aging wiring 21. In the example shown in FIG. 6D, in the anode aging wiring 21, a narrow portion 211D is formed by providing a doughnut-shaped wiring non-forming portion (a white portion in FIG. 6D). 2 and FIGS. 6A to 6D are not limited to the shapes illustrated in FIG. 2 and FIGS. 6A to 6D, if a narrow portion can be formed in the width direction, the narrow portion can be formed.

(Embodiment 2)
FIG. 7 is a plan view showing an organic EL display device substrate according to the second embodiment (Embodiment 2) of the present invention. In the organic EL display device substrate 100 shown in FIG. 1, the anode lead-out wiring 11 is extended downward from the organic EL panel 10 in FIG. 1, whereas the organic EL display device substrate 100A shown in FIG. 1 differs from the organic EL display device substrate 100 shown in FIG. 1 in that the anode lead-out wiring 11 is extended upward from the organic EL panel 10 in FIG. In other words, the organic EL panel 10 in the organic EL display device substrate 100A shown in FIG. 7 and the organic EL panel 10 in the organic EL display device substrate 100 shown in FIG. . FIG. 8 is an explanatory diagram showing one organic EL panel 10 and its periphery in the organic EL display device substrate 100A shown in FIG. As in the case of the first embodiment, in the portion A, the anode aging wiring 21 is provided with a narrow portion (see FIGS. 2 and 6) in which the wiring width is narrow.

  In the organic EL display device substrate 100 </ b> A shown in FIG. 7, all the anode routing wirings 11 connected to one organic EL panel 10 are once connected to one anode aging wiring 21. Each anode aging wiring 21 is connected to a voltage application device used during the aging process via the first anode aging common wiring 22 and the second anode aging common wiring 23. Therefore, if the anode aging wiring 21 is not electrically connected to the first anode aging common wiring 22, the anode aging wiring 21 is connected to the organic EL panel 10 connected to the anode aging wiring 21 via the anode routing wiring 11. On the other hand, current cannot be supplied from the voltage application device.

  Further, in the sealing step of step S2 shown in FIG. 3, one other glass substrate as the second substrate is disposed opposite to the glass substrate, and both glass substrates are joined by the sealing material as the gap material. However, FIG. 7 shows an example of a location where the sealing material 41 is applied. In addition, the other glass substrate as a 2nd board | substrate is not shown by FIG.

  In the example shown in FIG. 7, the sealing material 41 is applied in a rectangular frame shape composed of a rectangular upper part, a lower part, a left part, and a right part as seen in a plan view. Then, the portion where the lower portion and the right portion are in contact with the vicinity of the first anode aging common wiring 22 in the anode aging wiring 21. The aging process is preferably after the sealing process (see FIG. 3). However, when there is a defective panel separation process and an aging process after the sealing process, in the example shown in FIG. In this case, it becomes difficult to cut the anode aging wiring 21. When the laser beam is irradiated to the narrow portion existing in the portion A in an attempt to cut the anode aging wiring 21, there is a risk of damaging the sealing material 41 and the like.

  In the example shown in FIG. 7, the portion near the first anode aging common wiring 22 in the anode aging wiring 21 overlaps with the sealing material 41 in the portion where the lower portion and the right portion are in contact with each other. It is possible that the vicinity of the first anode aging common wiring 22 enters the inside rather than the portion surrounded by the sealing material 41. In that case, the anode aging wiring 21 cannot be cut in the defective panel separation process.

  Therefore, in the present embodiment, as shown in FIG. 9, the shape of the anode aging wiring 21 is set so as to avoid a portion overlapping with the sealing material 41 and the portion A is more inside than the portion surrounded by the sealing material 41. Shape so that it does not enter. In the example shown in FIG. 9, the anode aging wiring 21 is formed in a shape having a step when viewed in a plan view. As a result, the anode aging wiring 21 can be cut off at the portion A, and the organic EL panel 10 can be electrically separated from the first anode aging common wiring 22.

  Thus, in this embodiment, in addition to the effects of the first embodiment, if the anode aging wiring 21 is wired in a rectangular shape, the sealing material 41 causes the first aging common wiring 22 to be electrically connected. In such a situation that the organic EL panel 10 can be electrically separated from the first anode aging common wiring 22 by devising the shape of the anode aging wiring 21 in a situation where it cannot be separated automatically. The effect of becoming can be obtained.

  In each of the above embodiments, the organic EL panel 10 is excluded from the aging target by electrically separating the anode aging wiring 21 from the first anode aging common wiring 22. A countermeasure for excluding the EL panel 10 from the aging target may be performed on the cathode wiring side.

(Embodiment 3)
FIG. 10 shows a substrate for an organic EL display device according to the third embodiment (Embodiment 3), in which the cathode aging wiring 31 is electrically separated from the first cathode aging common wiring 32. It is a top view which shows the board | substrate for organic EL display apparatuses which can exclude the organic EL panel 10 from aging object.

  Nine organic EL panels 10 are formed on the substrate 100B for an organic EL display device illustrated in FIG. All the cathode lead wirings 13 drawn from the cathodes of the respective organic EL panels 10 are connected to the cathode aging wiring 31. In FIG. 7, the three cathode aging wirings 31 connected to the cathode routing wirings 13 of the three organic EL panels 10 arranged in the vertical direction are connected to the first cathode aging common wiring 32. Each of the first cathode aging common lines 32 is connected to the second cathode aging common line 33.

  In FIG. 10, a portion indicated by A (A portion), that is, in the vicinity of the portion connected to the first cathode aging common wiring 32 in the cathode aging wiring 31, the cathode aging wiring 31 has a narrow wiring width. It has a narrow part. FIG. 10 shows one portion A, but narrow portions are provided in all (9 in the example shown in FIG. 10) cathode aging wiring 31. Further, the shape of the narrow portion is the same as the shape of the narrow portion illustrated in FIGS. 2 and 6, for example.

  In the present embodiment, a narrow portion is formed in the vicinity of a portion connected to the first cathode aging common wiring 32, but the narrow portion is the first cathode in the cathode aging wiring 31. From the connection point of the cathode lead-out wiring 13 (the lowermost of the four cathode lead-out wirings 13 in each organic EL panel 10 in the plan view of FIG. 10) provided near the aging common wiring 32 However, as long as it is on the first cathode aging common wiring 32 side, it does not have to be in the vicinity of the portion connected to the first cathode aging common wiring 32. A connection portion (indicated by B in FIG. 10) of the cathode lead-out wiring 13 provided at a location closest to the first cathode aging common wiring 32 and a location connected to the first cathode aging common wiring 32 (Denoted by C in FIG. 10) is a portion where all the cathode routing wirings 13 connected to the cathode aging wiring 31 and the first cathode aging common wiring 32 can be electrically separated. is there.

  In the present embodiment, all the cathode lead wirings 13 connected to one organic EL panel 10 are once connected to one cathode aging wiring 31. In other words, each cathode aging wiring 31 is installed independently. The term “independent” means that it is not affected by the other cathode aging wiring 31. That is, even if the other cathode aging wiring 31 is cut or the like, it is not affected at all. Each of the cathode aging wirings 31 is connected to a voltage application device used during the aging process via the first cathode aging common wiring 32 and the second cathode aging common wiring 33. Therefore, if the cathode aging wiring 31 is not electrically connected to the first cathode aging common wiring 32 in the defective panel separation step, the cathode aging wiring 21 is connected to the cathode aging wiring 21 via the cathode routing wiring 13. The organic EL panel 10 cannot be energized from the voltage application device. That is, with the organic EL panel 10 excluded, the other organic EL panels 10 can be collectively subjected to aging processing.

  In the present embodiment, the aging process wiring (cathode aging wiring 31, first cathode aging common wiring 32 and second cathode aging common wiring 33) only cuts the cathode aging wiring 31. Thus, the specific organic EL panel 10 is formed so as not to be subjected to aging treatment, and the cathode aging wiring 31 is provided with a narrow portion. As a result, it is possible to perform an aging process on other organic EL panels 10 in a state where the specific organic EL panel 10 is excluded, and to apply the voltage to the specific organic EL panel 10 in a short time. It is possible to set to a state where it is impossible to energize from.

  In the configuration illustrated in FIG. 10, as with the anode-side wiring configuration illustrated in FIG. 1, all the anode routing wirings 11 connected to one organic EL panel 10 are temporarily connected to one anode aging. In this embodiment, such a wiring structure on the anode side is not essential. That is, for example, all the anode routing wirings 11 connected to all the organic EL panels 10 may be connected directly to the first anode aging common wiring 22.

  The present invention is a case where a large number of organic EL panels are formed on a single glass substrate, and is effectively applied to a method of collectively aging the organic EL panels.

The top view which shows the board | substrate for organic EL display apparatuses of 1st Embodiment. The elements on larger scale which expand and show the A section in FIG. Process drawing for demonstrating an example of the manufacturing method of the organic electroluminescent display apparatus using the organic electroluminescent display apparatus board | substrate and the organic electroluminescent panel obtained from it. (A) is a top view which shows a cathode routing wiring, the 1st common wiring for cathode aging, and its periphery, (B) is sectional drawing which shows a BB cross section. FIG. 4B is a plan view showing the cathode routing wiring, the first cathode aging common wiring, and the periphery thereof, and FIG. Explanatory drawing which shows the other example of the narrow part provided in the wiring for anode aging. The top view which shows the board | substrate for organic EL display apparatuses of 2nd Embodiment. Explanatory drawing which shows one organic EL panel and its periphery in the board | substrate for organic EL display apparatuses shown in FIG. Explanatory drawing which shows the wiring for non-linear anode aging. The top view which shows the board | substrate for organic EL display apparatuses of 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Organic EL panel 11 Anode routing wiring 13 Cathode routing wiring 21 Anode aging wiring 22 First anode aging common wiring 23 Second anode aging common wiring 31 Cathode aging wiring 32 First cathode aging common wiring 33 Second cathode aging common wiring 100, 100A, 100B Organic EL display device substrate

Claims (6)

In an organic EL display device substrate in which a plurality of organic EL panels including an anode wiring, an organic EL layer, and a cathode wiring are formed,
Anode aging wiring provided corresponding to each organic EL panel and connected to anode routing wiring connected to anode wiring in the organic EL panel;
It is electrically connected to each anode aging wiring, and includes anode aging common wiring for connecting the anode aging wiring to the aging device,
A narrow portion with a narrow line width is provided in a portion of the anode aging wiring where the anode routing wiring connected to the anode aging wiring and the anode aging common wiring can be electrically separated. A substrate for an organic EL display device. A sealing material for sealing the organic EL panel is provided,
The anode aging wiring has a route that avoids the installation position of the sealing material,
The substrate for an organic EL display device according to claim 1, wherein the narrow portion is provided in the path. In an organic EL display device substrate in which a plurality of organic EL panels including an anode wiring, an organic EL layer, and a cathode wiring are formed,
Cathode aging wiring provided corresponding to each organic EL panel, connected to the cathode lead wiring connected to the cathode wiring in the organic EL panel,
Each of the cathode aging wirings is electrically connected to the cathode aging wiring and connected to the aging device.
A narrow portion with a narrow line width is provided in a portion of the cathode aging wiring where the cathode routing wiring and the cathode aging common wiring connected to the cathode aging wiring can be electrically separated. A substrate for an organic EL display device. A sealing material for sealing the organic EL panel is provided,
The cathode aging wiring has a path that avoids the installation position of the sealing material,
The substrate for an organic EL display device according to claim 3, wherein the narrow portion is provided in the path. In the method for manufacturing an organic EL display device substrate in which a plurality of organic EL panels each including an anode wiring, an organic EL layer, and a cathode wiring are formed,
Corresponding to each organic EL panel, wiring the anode aging wiring or cathode aging wiring connected to the anode wiring or cathode wiring connected to the anode wiring or cathode wiring in the organic EL panel,
The anode aging wiring or the cathode aging wiring is electrically connected to the anode aging wiring or the cathode aging wiring, and the anode aging common wiring or the cathode aging common wiring for connecting the anode aging wiring or the cathode aging wiring to the aging device is wired.
This is a part of the anode routing wiring or cathode routing wiring, and the anode routing wiring or cathode routing wiring connected to the anode aging wiring or cathode aging wiring is electrically connected to the anode aging common wiring or cathode aging common wiring. A method for producing a substrate for an organic EL display device, comprising: providing a narrow portion having a narrow line width at a separable portion. An organic EL display device comprising an organic EL panel obtained by cutting the organic EL display device substrate according to claim 1, 2, 3 or 4.

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