JP2007066598A - Organic light emitting diode display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic LED (Light Emitting Diode) display in which moisture can be efficiently caught, and to provide an organic LED display of which display quality deterioration caused by separation of moisture catching members from an opposite substrate can be prevented. <P>SOLUTION: The organic LED display 1 comprises: a plurality of organic LED elements formed on a support substrate 2; seal material 6 formed on a periphery of a display area 5 where the plurality of the organic LED elements are arranged; and the opposite substrate 7 which is superimposed on the support substrate 2 via the seal material 6. A recess 13 is formed on a surface facing the organic LED element of the opposite substrate 7. The moisture catching member 14 is formed in a shape of a frame near the seal material 6 of the recess 13, and at least a part of the display area 5 is located inside the moisture catching member with the shape of the frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an organic LED (Light-Emitting Diode) display.

  The organic LED element is also called an organic EL (Electro Luminescence) element, and is an element that utilizes a phenomenon in which light is emitted by excitons generated by recombination of electrons and holes injected into an organic substance.

  In recent years, displays using this organic LED element have been actively developed. This is because the organic LED display has a wide viewing angle, a fast response speed, a high contrast ratio, and the like, as compared with a liquid crystal display, for example, and has excellent display performance.

  In general, an organic LED display has a structure in which an organic layer is sandwiched between a cathode and an anode. When a voltage is applied, electrons are injected as carriers from the cathode and holes are injected from the anode, respectively. When these carriers recombine inside the organic layer, excitons are generated. Light emission occurs as a process of deactivation of the exciton.

  However, if there is a defect such as a pinhole in the cathode, moisture enters from here, and peeling occurs at the interface with the organic layer, or crystallization of the organic layer is promoted. As a result, a region called a dark spot that does not emit light even when a voltage is applied is generated. The dark spot grows not only during energization but also during storage, and eventually spreads over the entire light emitting surface, leading to a significant decrease in display quality and luminance.

  On the other hand, conventionally, a method has been adopted in which moisture that has entered from the outside is absorbed by providing a water catching material on a substrate facing the substrate on which the organic LED element is provided.

  FIG. 5 is a cross-sectional view of a conventional organic LED display. As shown in the drawing, the organic LED display 31 includes a support substrate 32, a color filter 33 formed on the support substrate 32, and a protection formed on the support substrate 32 so as to cover the color filter 33. A film 34, a plurality of organic LED elements formed on the protective film 34, and a sealing material 36 formed around the display unit 35 in which the plurality of organic LED elements are arranged, spaced apart from the display unit 35. And a counter substrate 37 superimposed on the support substrate 32 with a sealant 36 interposed therebetween.

  The organic LED element has an anode 38, an organic layer 39, and a cathode 40 that are sequentially provided on the support substrate 32. Here, the anode 38 is separated by the insulating film 41. The organic LED element is separated by a partition wall 42 provided on the insulating film 41.

  In the organic LED display 31, a water catching material 44 is fixed to a recess 43 provided in the counter substrate 37. Thereby, it is supposed that the moisture in the organic LED display 31 can be captured.

  However, in the conventional organic LED display 31, the water catching material 44 is provided only at the substantially central portion of the counter substrate 37. For this reason, when the moisture that has entered from the outside via the sealing material 36 is absorbed by the organic LED element before being captured by the water capturing material 44, a dark spot is formed from the peripheral portion of the organic LED element toward the central portion. There was a problem that a phenomenon that progressed occurred.

  Further, there is also a problem that the water catching material 44 hangs down due to its weight and touches the display unit 35 to adversely affect the display.

  The present invention has been made in view of such problems. That is, the objective of this invention is providing the organic LED display which can capture | acquire the water | moisture content infiltrated inside the organic LED display efficiently, and can reduce the penetration | invasion of the water | moisture content to an organic layer.

  Moreover, the objective of this invention is providing the organic LED display which can prevent that a display quality falls by the water catching material provided in the opposing board | substrate hanging down.

  Other objects and advantages of the present invention will become apparent from the following description.

  A first aspect of the present invention is formed around a first substrate, a plurality of organic LED elements formed on the first substrate, and a display unit in which the plurality of organic LED elements are arranged. In an organic LED display having a sealing material and a second substrate superimposed on the first substrate via the sealing material, a recess is formed on the surface of the second substrate facing the organic LED element. The water catching material is formed in a frame shape in the vicinity of the sealing material of the recess, and at least a part of the display portion is located inside the frame shaped water catching material.

  The second aspect of the present invention is formed around the first substrate, the plurality of organic LED elements formed on the first substrate, and the display unit in which the plurality of organic LED elements are arranged. In the organic LED display having the sealed material and the second substrate overlapped with the first substrate via the sealing material, the concave portion is sealed on the surface of the second substrate facing the organic LED element. It is formed in a frame shape in the vicinity of the material, and a water catching material is provided in the recess, and at least a part of the display portion is located inside the frame shaped water catching material. .

  In any of the above aspects, it is preferable that the entire display unit is located inside the frame-shaped water catching material. In addition, the organic LED display has a plurality of partition walls that divide the plurality of organic LED elements on the first substrate, and the water catching material is located in a direction perpendicular to the longitudinal direction of the partition walls. It is preferably formed wider than a portion in a direction parallel to the longitudinal direction.

  According to the first aspect of the present invention, since the water catching material is formed in the vicinity of the sealing material in the recess, the moisture that has entered from the outside via the sealing material can be quickly captured by the water catching material. . Moreover, since the water catching material is formed in a frame shape, and at least a part of the display unit is positioned inside the frame-shaped water catching material, the water catching material comes into contact with the display unit as it hangs down. Can be reduced.

  Further, according to the second aspect of the present invention, since the recess is formed in a frame shape in the vicinity of the sealing material, and the water catching material is provided in the recess, the intrusion is made from the outside through the sealing material. Moisture can be quickly captured by the water capturing material. Moreover, since at least one part of a display part is located inside a frame-shaped water catching material, it can reduce contacting a display part when a water catching material hangs down.

  FIG. 1 is a cross-sectional view of an organic LED display according to the present embodiment. As shown in the figure, the organic LED display 1 includes a support substrate 2 as a first substrate, a color filter 3 formed on the support substrate 2, and a support substrate 2 so as to cover the color filter 3. Protective film 4 formed on top, a plurality of organic LED elements formed on protective film 4, sealing material 6 formed around display portion 5 in which a plurality of organic LED elements are arranged, and sealing material 6 and a counter substrate 7 as a second substrate superimposed on the support substrate 2 via 6.

  The organic LED element includes an anode 8, an organic layer 9, and a cathode 10 that are sequentially provided on the support substrate 2. Here, the anode 8 is separated by the insulating film 11. In addition, in FIG. 1, a plurality of partition walls 12 are formed in a strip shape in a direction perpendicular to the paper surface, and each of the plurality of organic LED elements is divided.

  In this embodiment, a recess 13 is formed on the surface of the counter substrate 7 facing the organic LED element, and a water catching material 14 is formed in the vicinity of the sealing material 6 of the recess 13 in a frame shape. It is characterized in that at least a part of the display unit 5 is located inside the frame made of the water material 14.

  According to the present embodiment, since the water catching material 14 is formed in the vicinity of the sealing material 6 of the recess 13, compared with the case where the water catching material is provided only at the substantially central portion of the counter substrate 7. In addition, it is possible to quickly capture the moisture that has entered from the outside through the sealing material 6 by the water capturing material 14. That is, since moisture can be captured by the water capturing material 14 before moisture is absorbed by the organic LED element, a phenomenon in which a dark spot proceeds from the peripheral part to the central part of the organic LED element can be suppressed.

  In the present specification, a dark spot that occurs around the organic LED element and then proceeds toward the center is referred to as a dark frame.

  In FIG. 2, the result of having evaluated the generation amount of the dark frame about the organic LED display in this Embodiment is shown. For comparison, the evaluation result of the conventional organic LED display described in FIG. 5 is also shown.

  In FIG. 2, the organic LED display in this Embodiment and the conventional organic LED display are produced so that the area of a water catching material may become the same. These organic LED displays were allowed to stand for 500 hours under conditions of high temperature and high humidity (temperature 80 ° C., humidity 90%). Then, about the display part of each organic LED display, the length of the dark frame which generate | occur | produced in the pixel on the diagonal line was measured and evaluated.

  A dark frame evaluation method will be described with reference to FIG. FIG. 3 is a schematic plan view of a pixel portion in the organic LED display.

  The dark frame 15 is generated in the pixel 17 of the organic LED element sandwiched between the partition walls 16 and proceeds from the end of the pixel 17 on the partition wall 16 side toward the center. In FIG. 3, the shaded area is the dark frame 15. The amount of generation of the dark frame 15 is evaluated by the length from the end of the pixel 17 toward the center (as indicated by the arrow 18 in FIG. 3). The larger this length, the greater the amount of dark frames generated and the more serious the defect.

  In FIG. 2, the horizontal axis indicates the evaluation position in the display unit of each organic LED display. Here, there are a total of seven evaluation positions for each organic LED display, and numbers 1 to 7 are assigned in order from the end. For example, the number 4 corresponds to the central part of the display unit. Numbers 1 and 7 respectively correspond to the end portions of the display unit. Other numbers correspond to equidistant positions between the central portion and the end portion. On the other hand, the vertical axis represents the length of the generated dark frame.

  Numbers 1 and 7 correspond to the pixels in the corner portion of each organic LED display. This portion is the region where the dark frame is most likely to occur because it is affected by moisture that penetrates through the sealing material from the vertical and horizontal directions.

  About each organic LED display, the part which attached | subjected the same number has shown that it exists in the substantially the same position on the diagonal of a display part.

  As can be seen from FIG. 2, in the conventional example, the length of the dark frame increases toward the periphery compared to the center. On the other hand, according to the present embodiment, it is possible to reduce the occurrence of dark frames in the peripheral portion of the display unit as compared with the conventional case. Since the water catching material has the same area, it can be said that the organic LED display according to the present embodiment can capture moisture more efficiently.

  Further, as described above, in FIG. 1, the water catching material 14 is formed in a frame shape, and at least a part of the display unit 5 is located inside the frame-like water catching material. By adopting such a structure, it is possible to prevent the water catching material 14 from coming into contact with the display unit 5 even when the water catching material 14 is peeled off from the counter substrate 7 and floated.

  In this Embodiment, it is preferable that the whole display part 5 is located inside a frame-shaped water catching material. Thereby, even if the water catching material 14 is peeled off from the counter substrate 7 and floats, the water catching material 14 does not come into contact with the display unit 5, so that the deterioration of display quality can be further suppressed. Become. Moreover, since it becomes the structure by which the arrangement | positioning position of a water catching material does not block the light emission part by setting it as such a structure, the organic LED display 1 can be made into a top emission.

  Moreover, it is preferable that the water catching material 14 is formed so that the part in the direction perpendicular to the longitudinal direction of the partition wall 12 is wider than the part in the direction parallel to the longitudinal direction. This is due to the following reason.

  As a result of intensive research, the present inventor has determined that the moisture intrusion speed entering the inside of the organic LED display 1 from the outside through the sealing material 6 is longer in the longitudinal direction than the longitudinal direction of the partition wall 12. On the other hand, it was found to be faster than the parallel direction. This is considered to be because there is a gap between the organic layer 9 and the partition wall 12 and the end of the organic layer 9 is exposed from this gap. This will be described in detail below.

  Moisture that has entered from the outside travels faster in the direction parallel to the longitudinal direction of the partition wall 12 (perpendicular to the paper surface in FIG. 1) than when traveling vertically. This is because, in the parallel direction, the barrier 12 does not interfere with the progress. The moisture that has entered from the parallel direction is absorbed from the exposed end portion of the organic layer 9 to generate a dark frame. At this time, the dark frame is generated in a direction perpendicular to the longitudinal direction of the partition wall 12. Thereafter, with the passage of time, a dark frame is generated from a direction parallel to the longitudinal direction of the partition wall 12.

  Therefore, in order to suppress the occurrence of dark frames, it is important to first prevent the ingress of moisture from the direction parallel to the longitudinal direction of the partition wall 12. It is preferable that the portion in the direction perpendicular to the longitudinal direction is formed wider than the portion in the direction parallel to the longitudinal direction.

  As described above, the organic LED display 1 according to the present embodiment clarifies the direction dependency of the ingress speed of moisture passing through the sealing material 6 in relation to the structure of the partition wall 12, and based on this, based on the water capturing material 14. It is designed to enhance the water trapping effect. In other words, in the present embodiment, it has been found that the rate of water movement is faster in the direction parallel to the longitudinal direction of the partition wall 12 than in the vertical direction. From this, the direction perpendicular to the longitudinal direction of the partition wall 12 is found. The amount of the water catching material is increased by widening the width of the water catching material 14 located in the position so that the generation of the dark frame can be effectively suppressed. Since the water capturing material 14 has such a shape, the ability to capture moisture that passes through the sealing material and enters the inside of the organic LED display 1 is effectively exhibited. In addition, it can exhibit a function of preventing moisture intrusion.

  In addition, the water catching material 14 is not restricted to the said shape. For example, the widths of the four sides on the top, bottom, left and right of the frame-shaped water catching material can be set according to the situation. Specifically, taking into account the installation environment and usage of the organic LED display 1 while taking into account the longitudinal direction of the partition wall 12, the width of the water catching material 14 where the water catching performance is desired to be increased is increased. May be.

  The frame shape in the present embodiment refers to a shape along the sealing material 6 and having an opening at the center. Here, the shape of the opening is not limited to a case similar to the shape formed by the outer periphery of the water catching material 14. The shape of the opening can be determined in consideration of the shape of the display unit 5 of the organic LED display 1. Specifically, the shape may be any shape that does not easily affect the display unit 5 even if the water catching material 14 is peeled off. For example, when the shape formed by the outer periphery of the water catching material 14 is a rectangle, the shape of the opening may be a circle, an ellipse, or an indeterminate shape.

  The shape of the frame is not limited to the one having complete continuity, for example, one having a chip in a part, one in which continuity is impaired by tearing, and further, four sides having cuts in four corners. Including those that are separate bodies. Further, the water catching material 14 may be provided only in the direction perpendicular to the longitudinal direction of the partition wall 12. In this case, although the shape of the water catching material 14 does not have a frame shape, it is possible to prevent moisture from entering from a direction parallel to the longitudinal direction of the partition wall 12, so that the water catching material 14 is provided in a frame shape. Although the effect is inferior to, the generation of dark frames can be suppressed to some extent.

  Further, the frame shape may be a double structure or a triple structure. In this case, different performance can be imparted by using different constituent materials for each frame. Moreover, it is also possible to enhance water catching performance by providing the water catching material 14 in a double or triple manner only in the longitudinal direction of the partition wall 12.

  As described above, the water catching material 14 is provided in the vicinity of the sealing material 6. In the present embodiment, the counter substrate 7 is provided in a region corresponding to a region between the display unit 5 and the sealing material 6 on the support substrate 2. By doing in this way, even if the situation where the water catching material layer 14 peels off from a counter substrate arises, it can make it difficult to affect the display part 5. FIG.

  In the present embodiment, it is also possible to provide the water catching material 14 in a wider area. In this case, although the water catching material 14 is formed up to the region facing the display unit 5 on the counter substrate 7, the water catching performance is improved because the width of the water catching material 14 is widened. Therefore, it is preferable to appropriately design in consideration of the water collection performance of the water collection material 14, in particular, the necessary water collection capacity in consideration of the longitudinal direction of the partition wall 12 and the influence on the opposing display unit 5.

  In the present embodiment, the water catching material 14 is provided in the recess 13 formed on the surface of the counter substrate 7. By doing in this way, the space | interval with the display part 5 which opposes the water catching material 14 can be taken widely. Therefore, for example, even if a situation occurs in which the water catching material 14 is peeled off from the counter substrate 7 and floats, the display unit 5 can be hardly affected.

  However, in the present embodiment, it is also possible to provide the water catching material 14 directly on the surface of the counter substrate 7 without forming the recess 13. By not forming the recess 13, the manufacturing process of the counter substrate 7, and thus the organic LED display 1, can be simplified.

  Although the organic LED display 1 in this Embodiment can be set as bottom emission, when the whole display part 5 is located inside a frame-shaped water catching material, it can also be set as top emission. In the case of bottom emission, since emitted light is extracted from the support substrate 2 side, a material having a high visible light transmittance is used as the support substrate 2. Specifically, in addition to inorganic glass such as alkali glass, alkali-free glass, and quartz glass, polyester, polycarbonate, polyether, polysulfone, polyethersulfone, polyvinyl alcohol, and fluorine-containing polymers such as polyvinylidene fluoride and polyvinyl fluoride. Transparent materials such as On the other hand, in the case of top emission, since emitted light is extracted from the counter substrate 7 side, a member that does not transmit light such as metal can be used for the support substrate 2.

The anode 8 is made of a transparent metal having a high work function, an alloy thereof, or another conductive compound. For example, ITO (Indium Tin Oxide), SnO ₂ or ZnO can be used as the anode material. For example, these films can be formed into an anode 8 by forming the film for vapor deposition or the like and then patterning the film using a photolithography method.

  In the present embodiment, the insulating film 11 has an opening at a position to be a display pixel, and plays a role of isolating and electrically insulating the anode 7. As the insulating film 11, for example, a polyimide resin can be used, and it can be formed by a printing method or the like. In the present embodiment, the insulating film 11 may not be provided.

  The partition wall 12 is made of an insulating resin such as polyimide. In addition, although the partition 12 has a reverse tapered cross-sectional shape in FIG. 1, depending on the molecular weight of the organic layer 9 formed in the upper layer, the partition 12 may have a cross-sectional shape such as a forward tapered shape or an arch shape. Good. That is, when the organic layer 9 is formed using a low molecular weight material, film formation by a vapor deposition method is common. Therefore, the organic layer 9 with high dimensional accuracy can be formed by making the cross-sectional shape of the partition wall 12 into an inversely tapered shape and depositing the material vertically from the upper part of the anode 8. On the other hand, in the case of a high molecular weight material, it is necessary to form a film using a coating method such as an inkjet method. Therefore, in order to flow the coating liquid onto the anode 8, it is desirable that the cross-sectional shape of the partition wall 12 is a forward taper shape or an arch shape. The partition wall 12 can be formed using a resist composition suitable for forming a desired cross-sectional shape.

  The organic layer 9 is a layer that emits white light by excitons generated by recombination of electrons and holes. Specifically, a three-layer structure including a hole transport layer, a light emitting layer, and an electron transport layer can be employed. The organic layer 9 can also have a two-layer structure in which the light emitting layer has both hole transporting properties and electron transporting properties. Furthermore, in order to lower the hole injection barrier from the anode, there may be a structure in which one hole injection layer having a small difference in ionization potential from the anode is provided between the hole transport layer and the anode. it can. These films can be formed by an evaporation method, but at least one film may be formed by a wet coating method such as a spray method, an inkjet method, a spin coating method, or a transfer method.

  Examples of the hole transport layer include N, N′-bis (1-naphthyl) -N, N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPD), N, N′— Diphenyl-N, N′-bis [N-phenyl-N- (2-naphthyl) -4′-aminobiphenyl-4-yl] -1,1′-biphenyl-4,4′-diamine (NPTE), 1 , 1-bis [(di-4-tolylamino) phenyl] cyclohexane (HTM2) and N, N′-diphenyl-N, N′-bis (3-methylphenyl) -1,1′-diphenyl-4,4 ′ -Diamine (TPD) etc. are mentioned.

  Examples of the electron transport layer include 2,5-bis (1-naphthyl) -1,3,4-oxadiazole (BND) and 2- (4-t-butylphenyl) -5- (4-biphenyl). -1,3,4-oxadiazole (PBD) and the like.

The light emitting layer is made of a material that provides a field where injected electrons and holes can be recombined and has high light emission efficiency. Specifically, tris (8-quinolinolato) aluminum complex (Alq ₃ ), bis (8-hydroxy) quinaldine aluminum phenoxide (Alq ′ ₂ OPh), bis (8-hydroxy) quinaldine aluminum-2,5- Dimethylphenoxide (BAlq), mono (2,2,6,6-tetramethyl-3,5-heptanedionate) lithium complex (Liq), mono (8-quinolinolato) sodium complex (Naq), mono (2, 2,6,6-tetramethyl-3,5-heptanedionate) lithium complex, mono (2,2,6,6-tetramethyl-3,5-heptanedionate) sodium complex and bis (8-quinolinolate) metal complexes of quinoline derivatives such as calcium complex (CAQ _2), tetraphenyl butadiene, Feniruki Kudrin (QD), anthracene, and a fluorescent substance such as perylene and coronene.

  The fluorescent material is preferably used as a dopant in combination with a host material capable of emitting light by itself. As a result, the emission wavelength characteristic of the host material can be changed, light emission shifted to a long wavelength can be achieved, and the light emission efficiency and stability of the device can be improved.

  As the host substance, a quinolinolato complex is preferable, and an aluminum complex having 8-quinolinol and a derivative thereof as a ligand is particularly preferable.

  For the cathode 10, a metal having a small work function or an alloy thereof is used. Specific examples include alkali metals, alkaline earth metals, and metals of Group 3 of the periodic table. Of these, aluminum (Al), magnesium (Mg), or alloys thereof are preferably used because they are inexpensive and have good chemical stability. These films can be formed into a cathode 10 formed by, for example, a vapor deposition method and patterned by the partition wall 12. Moreover, it can also be set as the cathode 10 patterned using the photolithographic method.

  The water catching material 14 includes a desiccant in an ultraviolet curable resin or a thermosetting resin. As the resin, an ultraviolet curable epoxy resin is preferably used. Further, the water catching material 14 may be one obtained by mixing a desiccant in an inert oil. On the other hand, as the desiccant, for example, oxides of alkaline earth metals such as calcium oxide (CaO) and barium oxide (BaO) or porous inorganic materials such as silica gel and molecular sieve can be used.

  As described above, the organic LED display 1 in the present embodiment can be a bottom emission, but when the entire display unit is located inside the frame-shaped water catching material, it may be a top emission. it can. In the case of bottom emission, the emitted light is extracted from the support substrate 2 side to the outside. Therefore, a member that does not transmit light such as metal can be used for the counter substrate 7. On the other hand, in the case of top emission, since the emitted light is extracted from the counter substrate 7 side, the same transparent material as the support substrate 2 is used for the counter substrate 7.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the example of FIG. 1, the concave portion 13 is formed on the surface of the counter substrate 7 facing the organic LED element, and the water capturing material 14 is formed in a frame shape in the vicinity of the sealing material 6 of the concave portion 13. Said. However, as shown in FIG. 4, the recess 23 is formed in a frame shape in the vicinity of the sealing material 6 on the surface of the counter substrate 27 facing the organic LED element, and the water catching material 24 is provided in the recess 23. Even in the case where it is, the same effect as the above-described embodiment can be obtained. In FIG. 4, the same reference numerals as those in FIG. 1 indicate the same parts.

  Also in the example of FIG. 4, it is preferable that the entire display unit 5 is located inside the frame-shaped water catching material. Thereby, even if the water catching material 24 is peeled off from the counter substrate and lifted, the water catching material 24 does not come into contact with the display unit 5, so that it is possible to further suppress the deterioration of display quality. .

  Moreover, it is preferable that the water catching material 24 is formed so that the part in the direction perpendicular to the longitudinal direction of the partition wall 12 is wider than the part in the direction parallel to the longitudinal direction. Thereby, since the ability to capture | acquire the water | moisture content which passes the sealing material 6 and permeates the inside of the organic LED display 21 can be exhibited effectively, the organic LED display 21 whole shows the outstanding water | moisture penetration prevention function. Can do.

  Furthermore, although an example using a color filter has been described in the present embodiment, the present invention is not limited to this. There is no restriction | limiting in particular in the structure of the organic LED element in this invention, There is no restriction | limiting in particular also in the system of full color. For example, (1) a method of converting organic LED elements that emit blue light into red, green, and blue light emission using a CCM (Color Changing Media) color conversion layer, and (2) each of red, green, and blue using a shadow mask A method of selectively forming a light emitting element, (3) a method of laminating red, green and blue light emitting elements in a direction perpendicular to the substrate and independently emitting light, or (4) a polymer organic LED element Can be applied by an ink-jet method to emit red, green and blue light.

It is an example of sectional drawing of the organic LED display of this Embodiment. It is the result of having evaluated the generation amount of the dark frame about the organic LED display in this Embodiment. It is explanatory drawing of the evaluation method of a dark frame. It is another example of sectional drawing of the organic LED display of this Embodiment. It is sectional drawing of the conventional organic LED display.

Explanation of symbols

1,21,31 Organic LED display 2,32 Support substrate 3,33 Color filter 4,34 Protective film 5,35 Display unit 6,36 Sealing material 7,27,37 Counter substrate 8,38 Anode 9,39 Organic layer 10 , 40 Cathode 11, 41 Insulating film 12, 16, 42 Partition 13, 23, 43 Recess 14, 24, 44 Water catching material 15 Dark frame 17 Pixel

Claims (4)

A first substrate;
A plurality of organic LED elements formed on the first substrate;
A sealing material formed around the display unit in which the plurality of organic LED elements are arranged;
In the organic LED display having the second substrate overlapped with the first substrate through the sealing material,
A concave portion is formed on the surface of the second substrate facing the organic LED element,
In the vicinity of the sealing material of the recess, a water capturing material is formed in a frame shape,
An organic LED display, wherein at least a part of the display unit is located inside the frame-shaped water catching material. A first substrate;
A plurality of organic LED elements formed on the first substrate;
A sealing material formed around the display unit in which the plurality of organic LED elements are arranged;
In the organic LED display having the second substrate overlapped with the first substrate through the sealing material,
On the surface of the second substrate facing the organic LED element, a recess is formed in a frame shape in the vicinity of the sealing material,
A water catching material is provided in the recess,
An organic LED display, wherein at least a part of the display unit is located inside the frame-shaped water catching material.   The organic LED display according to claim 1 or 2, wherein the entire display unit is located inside the frame-shaped water catching material. On the first substrate, having a plurality of partition walls dividing the plurality of organic LED elements,
The said water catching material is formed so that the site | part which is perpendicular | vertical with respect to the longitudinal direction of the said partition is formed more widely than the site | part which is parallel to this longitudinal direction. The organic LED display according to 1.

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