Organic light emitting device

Abstract

The invention provides an organic light-emitting device which is applied to the field of light-emitting display. The device comprises a substrate, wherein the substrate comprises a substrate, an anode, an auxiliary electrode and an anode lead which are arranged on the substrate, an insulating layer covering the auxiliary electrode and the anode lead, and an isolation column positioned on the insulating layer; the light-emitting layer is positioned on one side, far away from the substrate, of the anode and the insulating layer; the cathode is positioned on one side, far away from the anode, of the light-emitting layer; the cathodes comprise first cathodes positioned on the top surfaces of the isolation columns and second cathodes positioned on the peripheries of the isolation columns; and the first cathode and the second cathode are disconnected. The area of the cathode participating in electrical conduction is reduced, so that the possibility that the anode and the cathode are connected when the insulating layer has defects is reduced, and the risk of short circuit of the organic light-emitting device due to the insulating layer is reduced; the cathodes are separated through the isolation columns, so that heat conduction of the plane is reduced, heat gathering of the cathodes is reduced, heat is controlled in the light emitting direction, and then centralized management of the heat is achieved.

Description

Technical Field

[0001] The present invention relates to the field of light-emitting display technology, and in particular to an organic light-emitting device. Background Art

[0002] Organic Lighting Emitting Display (OLED) has the advantages of active luminescence, wide color gamut, fast response, wide viewing angle, high contrast and planarization, and is the development trend of the next generation of display and lighting technology.

[0003] OLED is a surface light source, and its main structure includes a substrate, an anode, a light-emitting layer, and a cathode. The substrate mainly relies on semiconductor photolithography technology to prepare the anode, auxiliary electrode, and insulating layer on the substrate. Among them, the main function of the insulating layer is pixel definition and insulation. At present, in order to reduce the gas in the device, an inorganic dielectric layer is usually used instead of the traditional organic glue to achieve insulation and improve the reliability of the device. However, when preparing the inorganic dielectric layer, due to the presence of particles, it is inevitable that the film quality of the inorganic dielectric layer will be affected, making the device prone to short circuit and affecting the reliability of the device. Summary of the invention

[0004] The embodiment of the present invention provides an organic light-emitting device, which can reduce the risk of short circuit of the organic light-emitting device due to the insulating layer and improve the reliability of the device.

[0005] In a first aspect, an embodiment of the present invention provides an organic light-emitting device, comprising:

[0006] The substrate comprises a substrate, an anode, an auxiliary electrode and an anode lead arranged on the substrate, an insulating layer covering the auxiliary electrode and the anode lead, and an isolation column located on the insulating layer;

[0007] a light-emitting layer, the light-emitting layer being located on a side of the anode and the insulating layer away from the substrate; and

[0008] The cathode is located at a side of the light-emitting layer away from the anode; the cathode comprises a first cathode located on the top surface of the isolation column and a second cathode located around the isolation column; the first cathode and the second cathode are disconnected.

[0009] In a possible implementation, the light-emitting layer includes multiple light-emitting areas; the isolation column isolates the second cathode into a cathode connection area, and the cathode connection area includes multiple sub-areas and multiple connection areas; wherein each sub-area corresponds to a light-emitting area; and each connection area connects two adjacent sub-areas.

[0010] In a possible implementation, the isolation column includes a plurality of first isolation columns and second isolation columns;

[0011] The light-emitting areas correspond to the first isolation columns one by one; each first isolation column is arranged around the corresponding light-emitting area and has at least one opening;

[0012] The second isolation column includes a plurality of isolation column pairs; the openings of the first isolation columns of each two adjacent light-emitting regions are connected by an isolation column pair; the area surrounded by each first isolation column forms a sub-area, and the area between each isolation column pair forms a connection area.

[0013] In a possible implementation, a plurality of light-emitting areas are arranged in a rectangular array, and openings are provided on opposite sides of first isolation columns of two adjacent light-emitting areas in the same row and on opposite sides of first isolation columns of two adjacent light-emitting areas in the same column.

[0014] In one possible implementation, the substrate also includes a first cathode lead arranged on the substrate, and the insulating layer covers the first cathode lead; the insulating layer is provided with a first overlapping hole, the first overlapping hole is located below the cathode connecting area and above the first cathode lead; the cathode connecting area is electrically connected to the first cathode lead through the first overlapping hole.

[0015] In a possible implementation, the light-emitting layer includes a plurality of light-emitting regions; the isolation column includes a plurality of third isolation columns;

[0016] The third isolation columns correspond to the light-emitting areas one by one, and each third isolation column is arranged around the corresponding light-emitting area; the second cathode in the area surrounded by the inner side of each third isolation column forms an isolated first cathode area.

[0017] In one possible implementation, the substrate also includes a plurality of second cathode leads arranged on the substrate, and the insulating layer covers the plurality of second cathode leads; the insulating layer is provided with a plurality of second overlapping holes; the second cathode leads, the second overlapping holes, and the first cathode areas correspond one to one; each second overlapping hole is located below the corresponding first cathode area and above the corresponding second cathode lead; each first cathode area is electrically connected to the corresponding second cathode lead through the corresponding second overlapping hole.

[0018] In a possible implementation, the light-emitting layer includes a plurality of light-emitting regions; the isolation column includes a plurality of fourth isolation columns;

[0019] A plurality of fourth isolation columns divide the cathode layer formed by the second cathode into a plurality of second cathode regions which are not connected to each other; each second cathode region corresponds to at least one light-emitting region; each second cathode region includes a portion of the edge region of the cathode layer;

[0020] Each second cathode area corresponds to a third overlapping hole, a third cathode lead and a overlapping pin; the third overlapping hole corresponding to each second cathode area is arranged on the insulating layer below the partial edge area included in the second cathode area; the third cathode lead corresponding to each second cathode area is arranged in the first area on the substrate, and the first area is the area on the substrate except the area corresponding to the cathode layer; each second cathode area is connected to the corresponding overlapping pin through the corresponding third overlapping hole and the corresponding third cathode lead.

[0021] In a possible implementation, the cross section of the isolation column is a trapezoid in which the length of the lower base is smaller than the length of the upper base; and the top surface of the isolation column is higher than the second cathode.

[0022] In a possible implementation manner, the first cathode is also used as a touch electrode.

[0023] An organic light-emitting device provided by an embodiment of the present invention comprises an isolation column arranged on an insulating layer of a substrate. Through the isolation column and the structure of the substrate, the light-emitting layer and the cathode, the isolation column is used to isolate the cathode, so that the cathode comprises a first cathode located on the top surface of the isolation column and a second cathode located around the isolation column, and the first cathode and the second cathode are disconnected, so that the first cathode is not located in the light-emitting area of ​​the organic light-emitting device and no longer participates in electrical conduction. Even if there is a defect in the insulating layer device below the first cathode, the first cathode and the anode will not be short-circuited. By reducing the cathode area participating in electrical conduction, the possibility of the anode and the cathode being connected when there is a defect in the insulating layer is reduced, and the risk of the organic light-emitting device being short-circuited due to the defect in the insulating layer is reduced. In addition, by arranging the isolation column to isolate the cathode and disconnecting the first cathode and the second cathode, heat conduction on the plane where the cathode is located can be reduced, heat convergence of the cathode can be reduced, and the heat can be controlled in the light-emitting direction, thereby realizing centralized management of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 is along Figure 2 Cross-sectional view of AA';

[0026] Figure 2 is a top view of an organic light-emitting device provided by an embodiment of the present invention;

[0027] Figure 3 yes Figure 1 Schematic diagram of the dimensioning of the isolation columns in FIG.

[0028] Figure 4 is a schematic structural diagram of an organic light-emitting device provided by another embodiment of the present invention;

[0029] Figure 5 yes Figure 4 A schematic diagram of a single light-emitting area and a first cathode on the surrounding isolation column being projected onto a substrate;

[0030] Figure 6 This is a schematic diagram of a cathode and a light-emitting region of an organic light-emitting device provided by another embodiment of the present invention being projected onto a substrate. DETAILED DESCRIPTION

[0031] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0032] The following examples will help those skilled in the art to further understand the effects of the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several modifications and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0034] It should also be understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0035] In the description of the present specification and the appended claims, the terms "first", "second", "third" and the like are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0036] References to "one embodiment" or "some embodiments" etc. described in the present specification mean that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0037] In addition, the “plurality” mentioned in the embodiments of the present invention should be interpreted as two or more.

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0039] See also Figure 1 , which shows a schematic diagram of the structure of an organic light-emitting device provided by an embodiment of the present invention. The organic light-emitting device may include:

[0040] The substrate includes a substrate 101, an anode 102 disposed on the substrate 101, an auxiliary electrode 104 and an anode lead 103, an insulating layer 105 covering the auxiliary electrode 104 and the anode lead 103, and an isolation column 106 located on the insulating layer 105;

[0041] The light-emitting layer 107 is located on a side of the anode 102 and the insulating layer 105 away from the substrate 101 . The light-emitting layer 107 is divided into at least two light-emitting areas by isolation columns 106 .

[0042] The cathode 108 is located on a side of the light-emitting layer 107 away from the anode 102 . The anode 102 and the cathode 108 may be located on both sides of the light-emitting layer 107 .

[0043] The cathode 108 includes a first cathode 1081 located on the top surface of the isolation column 106 and a second cathode 1082 located around the isolation column 106 ; the first cathode 1081 and the second cathode 1082 are disconnected.

[0044] The insulating layer 105 is provided with an opening exposing a portion of the anode 102 , that is, the insulating layer 105 may cover a portion of the anode 102 in addition to covering the auxiliary electrode 104 and the anode lead 103 .

[0045] The light emitting layer 107 may cover the entire substrate, or may only fill the opening of the insulating layer 105 and cover the portion of the anode 102 not covered by the insulating layer 105 .

[0046] The auxiliary electrode 104 can be set in the form of a grid, located around the light-emitting area, to improve the uniformity of light emission of the organic light-emitting device. The material of the auxiliary electrode 104 can be a metal material. For example, the material of the auxiliary electrode 104 and the anode lead 103 can be the same metal material. The embodiment of the present invention does not specifically limit the number of leads or grids included in the auxiliary electrode 104, and can be set according to actual needs. The anode lead 103 can be electrically connected to the anode 102 through the auxiliary electrode 104.

[0047] The embodiment of the present invention does not impose any specific limitation on the number of anodes 102 and anode leads 103 , and they can be set according to actual needs.

[0048] The substrate 101 may be a glass substrate or a flexible substrate, which is not specifically limited herein. The cathode 108 may be a metal cathode. The material of the metal cathode may be a single metal material, such as aluminum, silver, molybdenum, etc., or an alloy material, such as an alloy formed by two or more metals such as aluminum, magnesium, calcium, etc.

[0049] In a conventional organic light-emitting device, the entire cathode layer participates in electrical conduction. When there are defects in the insulating layer, the cathode and the anode will overlap and short-circuit. In the organic light-emitting device provided by the embodiment of the present invention, an isolation column 106 is provided to separate the cathode 108, so that the cathode 108 includes a first cathode 1081 located on the top surface of the isolation column 106 and a second cathode 1082 located around the isolation column 106, and the first cathode 1081 and the second cathode 1082 are disconnected, so that the first cathode 1081 is not located in the light-emitting area of ​​the organic light-emitting device and no longer participates in electrical conduction. Even if there are defects in the insulating layer below the first cathode 1081, the first cathode 1081 and the anode lead 103 or the auxiliary electrode 1082 are not connected. 4 will not cause a short circuit. By reducing the area of ​​the cathode 108 involved in electrical conduction, the possibility of the anode 102 and the cathode 108 being connected when there are defects in the insulating layer 105 is reduced, thereby reducing the risk of the organic light-emitting device being short-circuited due to the insulating layer 105. In addition, by arranging the isolation column 106 to separate the cathode 108, the first cathode 1081 and the second cathode 1082 are disconnected, which can reduce the heat conduction on the plane where the cathode 108 is located, reduce the heat accumulation of the cathode 108, control the heat in the light-emitting direction, and thus achieve centralized management of the heat.

[0050] There are many different design ideas for the graphic design of the isolation column 106 , which are described below in conjunction with different embodiments.

[0051] Embodiment 1:

[0052] The light-emitting layer 107 includes a plurality of light-emitting regions. The isolation column 106 isolates the second cathode 1082 to form a cathode connection region. The cathode connection region includes a plurality of sub-regions and a plurality of connection regions. Each sub-region corresponds to a light-emitting region; and each connection region connects two adjacent sub-regions.

[0053] In this embodiment, through the graphic design of the isolation column 106, on the one hand, the second cathode 1082 corresponding to each light-emitting area is formed into a sub-area, and on the other hand, a connection area is isolated, and all sub-areas are connected to form an integral cathode connection area through the connection area. In this way, when the organic light-emitting device is working, since the cathode connection area is disconnected from the second cathode 1082, only the cathode connection area can be turned on, and the area formed by the second cathode 1082 outside the cathode connection area is not turned on. In addition, since all sub-areas are connected, the power-on control of the cathode can be realized through one lead, which is easy to realize. In other words, in this embodiment, the cathode 108 corresponding to the light-emitting area (the cathode connection area) participates in electrical conduction, and the cathode 108 corresponding to the non-light-emitting area (the first cathode 1081 and the second cathode 1082 outside the cathode connection area) does not participate in electrical conduction, so the cathode and anode of the organic light-emitting device will not be short-circuited due to defects in the insulating layer 105 in the non-light-emitting area, further reducing the risk of the organic light-emitting device being short-circuited due to the insulating layer 105.

[0054] The following is a description with reference to the accompanying drawings. Figure 2 FIG. 4 is a top view of an organic light-emitting device provided in one embodiment of the present invention. Figure 1 For along Figure 2 It should be noted that the top view of the organic light-emitting device shows the cathode 108, that is, Figure 2 The cathode 108 is shown in FIG. Figure 2 The cathode 108 in different areas is represented by different patterns. The area filled with oblique lines represents the first cathode 1081 located on the top surface of the isolation column 106 (the B1 cathode area in the figure); the area filled with gray represents the second cathode 1082 on the 9 rectangular light-emitting areas (the B2 cathode area in the figure) and the second cathode 1082 that serves as a connection between the 9 rectangular light-emitting areas (the B3 cathode area in the figure); the area filled with dots and short dashes represents the second cathode 1082 in other areas (the B4 cathode area in the figure). Among them, the B2 cathode area and the B3 cathode area are the above-mentioned cathode connection areas. It can be seen that the area of ​​the cathode connection area only accounts for a part of the overall area of ​​the cathode, that is, the area of ​​the cathode 108 participating in electrical conduction is greatly reduced.

[0055] Reference Figure 1 and Figure 2 In some implementations, the isolation column 106 includes a plurality of first isolation columns and a plurality of second isolation columns.

[0056] The light-emitting regions correspond to the first isolation columns one by one. Each first isolation column is arranged around the corresponding light-emitting region and has at least one opening.

[0057] The second isolation column includes a plurality of isolation column pairs. The openings of the first isolation columns of each two adjacent light-emitting regions are connected by an isolation column pair. The area surrounded by each first isolation column forms a sub-area, and the area between each isolation column pair forms a connection area.

[0058] Specific to Figure 2 In the embodiment, the first isolation column is an isolation column located around the cathode region of B2 and below the cathode region of B1. The isolation column pair is two isolation columns located on both sides of the cathode region of B3 and below the cathode region of B1, which are parallel and have a gap. The entire area where the cathode region of B2 and the cathode region of B3 are connected is the cathode connection area mentioned above.

[0059] In this embodiment, the above-mentioned connection area can also be called a cathode connection port. The cathode connection port can be formed by a graphic design of an isolation column (such as Figure 2 The cathode 108 of the cathode connection port and the cathode 108 of the light-emitting area are connected when the cathode 108 is deposited in the entire layer, thereby forming a connected cathode connection area. This embodiment can achieve overall connection of cathodes in multiple light-emitting areas through the cathode connection port.

[0060] For example, see Figure 2 , multiple light-emitting areas are arranged in a rectangular array. The first isolation columns of two adjacent light-emitting areas in the same row are provided with openings on opposite sides, and the first isolation columns of two adjacent light-emitting areas in the same column are provided with openings on opposite sides. This arrangement makes the multiple light-emitting areas and the cathode connection ports between the multiple light-emitting areas evenly distributed, so that the light emission and heat conduction of the organic light-emitting device are more uniform.

[0061] It should be noted that the light-emitting area can also be in other shapes such as triangle, trapezoid, circle, etc., and the arrangement of the light-emitting areas can also be linear, curved, circular or other array arrangements. The arrangement of the isolation column pairs connecting different light-emitting areas can be adjusted according to the shape of the light-emitting area and the array arrangement method, so that the cathodes on all light-emitting areas can be connected into an integral connected area, and the area occupied by the cathode connection port can be smaller than that of the light-emitting area, and no limitation is made here.

[0062] In the above embodiment, the cathode connection area formed by the B2 cathode area and the B3 cathode area participates in electrical conduction to realize the light-emitting function of the light-emitting area. The B1 cathode area and the B4 cathode area do not participate in electrical conduction and are disconnected from the B2 cathode area and the B3 cathode area. For organic light-emitting devices, when there are defects in the insulating layer 105, the cathode above the defective position and the anode below will overlap and short-circuit. However, in this embodiment, due to the design of the isolation column, the cathode of the light-emitting area (B2 cathode area and B3 cathode area) and the cathode of the non-light-emitting area (B1 cathode area and B4 cathode area) are disconnected, and the cathode of the non-light-emitting area will not be energized, so the cathode and the anode will not be short-circuited due to defects in the insulating layer 105 in the non-light-emitting area, thereby reducing the risk of short circuits in organic light-emitting devices.

[0063] Optionally, the substrate further includes a first cathode lead (not shown) disposed on the substrate 101. The insulating layer 105 covers the first cathode lead (not shown). The insulating layer 105 is provided with a first lap hole. The first lap hole is located below the cathode connection area and above the first cathode lead. The cathode connection area is electrically connected to the first cathode lead through the first lap hole.

[0064] The first lap hole can be realized by etching a via hole in the insulating layer 105. The first cathode lead can be prepared on the substrate in the same layer as the anode and the anode lead, and the first cathode lead and the anode lead 103 can be made of the same material. By opening the first lap hole in the insulating layer 105 below the cathode connection area and the first cathode lead, the power supply control of the cathode connection area can be realized.

[0065] In some embodiments, see Figure 1 and Figure 3 , the cross section of the isolation column 106 is a trapezoid (also called an inverted trapezoid) whose lower base length is less than the upper base length. The top surface of the isolation column 106 is higher than the second cathode 1082. Optionally, the height H of the isolation column 106 is greater than the sum of the thickness of the cathode 108 and the thickness of the light-emitting layer 107. Exemplarily, the height H of the isolation column 106 is 1-3 μm; the width L of the top surface of the isolation column 106 is 3-20 μm; the angle α between the bottom surface and the waist of the cross section of the isolation column 106 is 90-120 degrees.

[0066] In the process of preparing an organic light-emitting device, the patterned isolation column 106 is usually evaporated first, then the light-emitting layer 107 is evaporated, and then the entire cathode 108 (including the first cathode 1081 and the second cathode 1082) is evaporated. The purpose of designing the isolation column is to enable the first cathode 1081 located on the top surface of the isolation column 106 and the second cathode 1082 located around the isolation column 106 to be disconnected due to the height difference when evaporating the cathode 108, and to enable the second cathode 1082 on both sides of the isolation column to be disconnected by the isolation column 106. Therefore, the value of the height H of the isolation column 106 is related to the thickness of the light-emitting layer 107 and the cathode 108. The height H is designed to be greater than the sum of the thickness of the light-emitting layer 107 and the cathode 108, so as to ensure that the first cathode 1081 and the second cathode 1082 are completely disconnected.

[0067] If the cross section of the isolation column 106 is designed to be a regular trapezoid, then during the process of evaporating the cathode, the top surface of the isolation column 106 cannot cover the waist, so the waist will also be plated with the cathode, so that the first cathode 1081 on the top surface of the isolation column 106 will be connected to the second cathode 1082 around the isolation column 106 through the cathode at the waist, resulting in the isolation column 106 being unable to play the role of isolation and disconnection. In order to avoid this problem, the cross section of the isolation column 106 is designed to be an inverted trapezoid in this embodiment. During the process of evaporating the cathode, the top surface of the isolation column 106 blocks the waist of the isolation column 106, and the waist will not be plated with the cathode, thereby ensuring that the first cathode 1081 on the top surface of the isolation column 106 and the second cathode 1082 around the isolation column 106 are disconnected.

[0068] In addition, when selecting the angle α between the bottom surface and the waist of the isolation column 106 cross section, and the width L of the top surface of the isolation column 106, the stability and process difficulty of the isolation column 106 can be considered. Since the cross section of the isolation column 106 is an inverted trapezoid, the smaller the width L of the top surface of the isolation column 106 is, the greater the obtuse angle α is, the greater the processing difficulty is. Specifically, the value range of the angle α and the width L of the top surface of the isolation column 106 can be determined by testing or experience, and is not limited here.

[0069] Embodiment 2:

[0070] Different from the design in the first embodiment in which the second cathodes 1082 on all the light-emitting areas are connected via the cathode connection port, the isolation column in this embodiment is designed to isolate each light-emitting area separately without forming a connected area.

[0071] Reference Figure 4 and Figure 5 , Figure 4 A schematic diagram of the structure of an organic light-emitting device provided in another embodiment of the present invention, Figure 5 for Figure 4 Schematic diagram of a single light-emitting area and the first cathode on the surrounding isolation column being projected onto the substrate, along Figure 5 The cross-sectional view of BB' in corresponds to Figure 4 Schematic diagram of the structure of a single light-emitting area and the isolation columns on both sides.

[0072] In this embodiment, the light emitting layer 107 includes a plurality of light emitting regions. The spacer includes a plurality of third spacers.

[0073] The third isolation columns correspond to the light-emitting areas one by one. Each third isolation column is arranged around the corresponding light-emitting area. The second cathode of the area surrounded by the inner side of each third isolation column forms an isolated first cathode area.

[0074] Figure 5 The gray area in the middle triangle represents a light-emitting area, and the surrounding triangle frame represents the first cathode 1081 on the third isolation column. Figure 4 and Figure 5 It can be seen that in this embodiment, the third isolation column isolates a single light-emitting area separately, and this part of the second cathode 1082 forms a separate cathode area (for the convenience of expression, called the first cathode area), which is not connected to the second cathodes 1082 of other light-emitting areas, so that the cathode and anode of each light-emitting area can be controlled separately, and the operation of each light-emitting area can be controlled separately, and the working status and short-circuit conditions of each light-emitting area do not affect each other.

[0075] Optionally, continue to refer to Figure 4 and Figure 5 The substrate further includes a plurality of second cathode leads 109 disposed on the substrate 101. The insulating layer 105 covers the plurality of second cathode leads 109. The insulating layer 105 is provided with a plurality of second lap holes 110. The second cathode leads 109, the second lap holes 110, and the first cathode regions correspond one to one. Each second lap hole 110 is located below the corresponding first cathode region and above the corresponding second cathode lead 109. Each first cathode region is electrically connected to the corresponding second cathode lead 109 through the corresponding second lap hole 110.

[0076] Reference Figure 4 and Figure 5 In this embodiment, the light-emitting layer 107 can be prepared by a fine metal mask (FMM), so that the light-emitting layer 107 is only located above the anode 102. A gap is left between the third isolation column and the light-emitting area surrounded by it, and the second overlap hole 110 can be provided on the insulating layer in the gap. By providing a separate second overlap hole and a second cathode lead for the first cathode area on each light-emitting area, separate light emission control of each light-emitting area is achieved.

[0077] Specifically, the area of ​​the lighting screen corresponding to the organic light-emitting device is relatively large, and the lateral voltage drop of the anode 102 of the organic light-emitting device makes the uniformity of the screen light emission worse. Therefore, it is necessary to divide the large area and use a large number of small areas for lighting control. In the embodiment of the present invention, the smaller light-emitting area can be individually wired through the isolation column 106 to achieve separate driving of each light-emitting area. Because the area of ​​the light-emitting area is reduced, the uniformity of light emission does not need to consider the lateral voltage drop, and the brightness can be greatly improved, thereby realizing the design of a high-brightness screen.

[0078] The area of ​​the lighting screen corresponding to the organic light-emitting device is relatively large, and the power consumption of the screen required is also relatively large, so the heat generation is also relatively serious. The embodiment of the present invention can separate the cathode 108 from the horizontal plane by introducing the isolation column 106, reduce the heat conduction of the horizontal plane, and further reduce the heat accumulation of the cathode 108, and control the heat in the light-emitting direction, that is, the heat transfer direction is the light-emitting direction, such as Figure 4 As shown, centralized heat management can be achieved. For example, a high heat dissipation film can be applied to the back of the screen to reduce the surface temperature of the screen.

[0079] Embodiment three:

[0080] Figure 6 A schematic diagram of a cathode and a light-emitting region of an organic light-emitting device provided by another embodiment of the present invention being projected onto a substrate. Figure 6 The area filled with the oblique line represents the first cathode 1081 located on the top surface of the isolation column 106 (the C1 cathode area in the figure); the triangular gray filled area represents the second cathode 1082 above the light-emitting area; the area filled with dots and short dashes represents the second cathode 1082 area including the light-emitting area divided by the isolation column 106 (the C2 cathode area in the figure, a total of six) and the second cathode 1082 area not including the light-emitting area (the C3 cathode area in the figure, there is one).

[0081] In this embodiment, the light emitting layer 107 includes a plurality of light emitting regions. The isolation column 106 includes a plurality of fourth isolation columns ( Figure 6 It is arranged below the cathode region of C1, not shown).

[0082] The plurality of fourth isolation columns divide the cathode layer formed by the second cathode 1082 into a plurality of second cathode regions ( Figure 6 Each second cathode region corresponds to at least one light emitting region. Each second cathode region includes a portion of the edge region of the cathode layer.

[0083] Each second cathode region corresponds to a third lap hole 111, a third cathode lead 112 and a lap pin 113. The third lap hole 111 corresponding to each second cathode region is arranged on the insulating layer below the partial edge region included in the second cathode region. The third cathode lead 112 corresponding to each second cathode region is arranged in the first region on the substrate, and the first region is the region on the substrate excluding the region corresponding to the cathode layer. Each second cathode region is connected to the corresponding lap pin 113 through the corresponding third lap hole 111 and the corresponding third cathode lead 112.

[0084] Specific to Figure 6 There are six second cathode regions (numbered ① to ⑥ for ease of description, not shown). There are six third overlap holes 111, numbered a to f. There are 18 light-emitting regions, numbered 1 to 18. The corresponding relationship between the second cathode region, the light-emitting region and the third overlap holes 111 is as follows:

[0085] Table 1 Correspondence between the second cathode region, the light emitting region and the third overlapping hole 111

[0086]

[0087]

[0088] It should be noted that Figure 6 It is only an example. The number and shape of the light-emitting area, the number and distribution of the C2 cathode area, and the number and distribution of the C3 cathode area are different according to different isolation column graphic designs, and are not limited here. The C3 cathode area does not include the light-emitting area and does not participate in electrical conduction. When designing, the area of ​​the C3 cathode area can be increased as much as possible on the basis of maintaining a reasonable layout of the C2 cathode area, thereby reducing the risk of short circuit.

[0089] In this embodiment, the second cathode 1082 is divided by isolation columns so that a part of the second cathode 1082 area including the light-emitting area is located at the edge of the cathode layer. In this way, a third overlapping hole 111 can be set at the edge of the cathode layer to improve the wiring utilization rate of the edge of the cathode layer, and the third cathode lead 112 on the substrate is distributed in the area outside the projection area of ​​the cathode layer, avoiding the third cathode lead 112 from passing through the area where the anode 102, the anode lead 103, and the auxiliary electrode 104 are densely distributed, which facilitates wiring, reduces the possibility of short-circuiting the third cathode lead 112 and the anode 102, and reduces the risk of short circuit.

[0090] In some embodiments, the first cathode 1081 is also used as a touch electrode.

[0091] In the embodiment of the present invention, the first cathode 1081 does not participate in electrical conduction when the organic light-emitting device is emitting light. If the organic light-emitting device is used in a touch screen display device, the first cathode 1081 can be used as a touch electrode. For example, Figure 2 In the illustrated embodiment, the light-emitting regions are arranged in an array, so the isolation columns 106 are also regularly distributed in the row and column directions. Array-arranged overlapping holes can be opened at the corresponding positions of the isolation columns 106 and the insulating layer, and the first cathode 1081 is connected to the lead wire for touch signal transmission on the substrate 101 through the overlapping holes to realize the transmission of touch signals, so that there is no need to set up additional touch electrodes, which is conducive to simplifying the preparation process of the organic light-emitting device.

[0092] In some embodiments, the spacer 106 covers all of the anode lead 103 .

[0093] It should be noted that the isolation column 106 described in the embodiment of the present invention covers all the anode leads 103, which does not mean that the isolation column 106 directly covers all the anode leads 103, but means that there is an isolation column 106 above each anode lead 103, which can cover the corresponding anode lead 103, that is, the isolation column 106 can be located above the corresponding position of the insulating layer 105 covering the anode lead 103.

[0094] In the embodiment of the present invention, the isolation column 106 can cover all the anode leads 103, so that if there is a defect in the insulating layer 107 above the anode lead 103, due to the insulating isolation column 106 above, the anode lead 103 at the defective position of the insulating layer 107 will not be short-circuited with the cathode 108. In this way, the isolation column 106 and the insulating layer 107 play a double-layer insulation protection role for the anode lead 103, further reducing the possibility of the anode lead 103 and the cathode 108 being short-circuited, thereby further reducing the risk of short circuit, and further improving the reliability of the organic light-emitting device.

[0095] In some embodiments, the anode 102 includes indium tin oxide (ITO).

[0096] The anode 102 may also be made of other materials, which are not specifically limited herein.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An organic light-emitting device, characterized in that: include: A substrate, the substrate comprising a substrate, an anode, an auxiliary electrode and an anode lead arranged on the substrate, an insulating layer covering the auxiliary electrode and the anode lead, and an isolation column located on the insulating layer; a light-emitting layer, the light-emitting layer being located on a side of the anode and the insulating layer away from the substrate; and The cathode is located at a side of the light-emitting layer away from the anode; the cathode comprises a first cathode located on the top surface of the isolation column and a second cathode located around the isolation column; the first cathode and the second cathode are disconnected.

2. The organic light-emitting device according to claim 1, characterized in that: The light-emitting layer includes a plurality of light-emitting areas; the isolation column isolates the second cathode into a cathode connection area, and the cathode connection area includes a plurality of sub-areas and a plurality of connection areas; wherein each sub-area corresponds to a light-emitting area; and each connection area connects two adjacent sub-areas.

3. The organic light-emitting device according to claim 2, characterized in that: The isolation column comprises a plurality of first isolation columns and a second isolation column; The light-emitting areas correspond to the first isolation columns one by one; each first isolation column is arranged around the corresponding light-emitting area and has at least one opening; The second isolation column includes a plurality of isolation column pairs; the openings of the first isolation columns of each two adjacent light-emitting areas are connected by an isolation column pair; the area surrounded by each first isolation column forms a sub-area, and the area between each isolation column pair forms a connection area.

4. The organic light emitting device according to claim 3, characterized in that: The plurality of light-emitting areas are arranged in a rectangular array, and the first isolation columns of two adjacent light-emitting areas in the same row have openings on opposite sides, and the first isolation columns of two adjacent light-emitting areas in the same column have openings on opposite sides.

5. The organic light-emitting device according to claim 3, characterized in that: The substrate also includes a first cathode lead arranged on the substrate, and the insulating layer covers the first cathode lead; the insulating layer is provided with a first overlapping hole, and the first overlapping hole is located below the cathode connecting area and above the first cathode lead; the cathode connecting area is electrically connected to the first cathode lead through the first overlapping hole.

6. The organic light-emitting device according to claim 1, characterized in that: The light-emitting layer includes a plurality of light-emitting regions; the isolation column includes a plurality of third isolation columns; The third isolation columns correspond to the light-emitting areas one by one, and each third isolation column is arranged around the corresponding light-emitting area; the second cathode in the area surrounded by the inner side of each third isolation column forms an isolated first cathode area.

7. The organic light emitting device according to claim 6, characterized in that: The substrate also includes a plurality of second cathode leads arranged on the substrate, and the insulating layer covers the plurality of second cathode leads; the insulating layer is provided with a plurality of second overlapping holes; the second cathode leads, the second overlapping holes, and the first cathode areas correspond one to one; each second overlapping hole is located below the corresponding first cathode area and above the corresponding second cathode lead; each first cathode area is electrically connected to the corresponding second cathode lead through the corresponding second overlapping hole.

8. The organic light-emitting device according to claim 1, characterized in that: The light-emitting layer includes a plurality of light-emitting regions; the isolation column includes a plurality of fourth isolation columns; The plurality of fourth isolation columns divide the cathode layer formed by the second cathode into a plurality of second cathode regions which are not connected to each other; each second cathode region corresponds to at least one light-emitting region; each second cathode region includes a portion of the edge region of the cathode layer; Each second cathode area corresponds to a third overlapping hole, a third cathode lead and a overlapping pin; the third overlapping hole corresponding to each second cathode area is arranged on the insulating layer below the partial edge area included in the second cathode area; the third cathode lead corresponding to each second cathode area is arranged in the first area on the substrate, and the first area is the area on the substrate except the area corresponding to the cathode layer; each second cathode area is connected to the corresponding overlapping pin through the corresponding third overlapping hole and the corresponding third cathode lead.

9. The organic light-emitting device according to any one of claims 1 to 8, characterized in that: The cross section of the isolation column is a trapezoid in which the length of the lower base is smaller than the length of the upper base; and the top surface of the isolation column is higher than the second cathode.

10. The organic light-emitting device according to any one of claims 1 to 8, characterized in that: The first cathode is also used as a touch electrode.

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