CN114725179A - OLED display panel and display device - Google Patents
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- CN114725179A CN114725179A CN202210440590.4A CN202210440590A CN114725179A CN 114725179 A CN114725179 A CN 114725179A CN 202210440590 A CN202210440590 A CN 202210440590A CN 114725179 A CN114725179 A CN 114725179A
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
Abstract
The OLED display panel comprises at least one first isolation member and/or at least one second isolation member, wherein the first isolation member and the second isolation member are arranged on the top surface of the pixel defining layer, the first isolation member material and the common layer material repel each other so as to disconnect the common layer at the first isolation member, and the second isolation member material and the second electrode material repel each other so as to disconnect the second electrode at the second isolation member. The promotion of display effect can be realized in this application.
Description
Technical Field
The application relates to the technical field of display, in particular to an OLED display panel and a display device.
Background
The OLED display panel includes a plurality of sub-pixels, each of which includes an anode, a light emitting material layer including a Hole Transport Layer (HTL), a light Emitting Layer (EL), and an Electron Transport Layer (ETL), and a cathode, which are stacked, and the light emitting material layer emits light when the cathode and the anode are energized.
In one aspect, the sub-pixels are separated from each other by a pixel defining layer, and in the current manufacturing process, the light emitting layer is separately disposed corresponding to each sub-pixel, and the hole transport layer and/or the electron transport layer is a common layer and is disposed corresponding to the pixel defining layer between each sub-pixel and the sub-pixel. When the resolution of the display panel is larger, the number of the sub-pixels is larger, so that the size of the pixel defining layer between adjacent sub-pixels is smaller and smaller, when a certain sub-pixel emits light, a small amount of current generated by the certain sub-pixel may enter other adjacent sub-pixels along the common layer, so that the sub-pixel which should not emit light emits light, that is, a leakage light emission phenomenon is generated, and the phenomenon may affect the image display effect of the OLED display panel. On the other hand, in the current OLED display panel, the cathode is disposed in an entire layer, and the reflectivity of the cathode to light is strong, so that the light transmittance of the entire OLED display panel is low, and the image display effect of the OLED display panel is also affected.
Therefore, the conventional OLED display panel has a technical problem of poor display effect, and needs to be improved.
Disclosure of Invention
The embodiment of the application provides an OLED display panel and a display device, which are used for relieving the technical problem of poor display effect in the existing OLED display panel.
The embodiment of the application provides an OLED display panel, includes:
a driving circuit layer;
a plurality of first electrodes formed on a first side of the driving circuit layer, the plurality of first electrodes being independent of each other;
a pixel defining layer formed on a first side of the driving circuit layer, the pixel defining layer being disposed corresponding to an area where the first electrodes are not disposed, and forming a plurality of opening regions exposing the first electrodes;
a light emitting material layer formed on a side of the first electrode away from the driving circuit layer, including a light emitting layer formed in each opening region and a common layer formed in each opening region and covering a top surface of the pixel defining layer;
the second electrode is formed on one side of the light-emitting material layer far away from the driving circuit layer and covers each opening area and the top surface of the pixel defining layer;
wherein the OLED display panel includes at least one first isolation member and/or at least one second isolation member, the first isolation member and the second isolation member being disposed on a top surface of the pixel defining layer, the first isolation member material being repulsive to the common layer material to break the common layer at the first isolation member, the second isolation member material being repulsive to the second electrode material to break the second electrode at the second isolation member.
In one embodiment, the surface energy of the first isolation member is below a threshold.
In one embodiment, the material of the second separator member is a cathode selective material.
In one embodiment, the OLED display panel further includes an auxiliary electrode covering the second electrode and electrically connected to the second electrode, and a light transmittance of the auxiliary electrode is not less than a light transmittance of the second electrode.
In one embodiment, the first electrode, the light emitting material layer, and the second electrode in the opening area form a subpixel, the OLED display panel includes a plurality of repeating units including a pixel defining layer forming a virtual hexagonal structure and subpixels positioned at respective vertexes of the virtual hexagon, the subpixels at adjacent vertexes in the virtual hexagon are different in color, the adjacent repeating units share one side of the virtual hexagon and two subpixels at vertexes at both ends of the side, and the second partition member is disposed inside the virtual hexagon.
In one embodiment, the second isolation member is hexagonal in shape.
In one embodiment, the first partition member is disposed inside the virtual hexagon and at least one of the side edges.
In one embodiment, the pixel defining layer has a top surface formed with a recess, and the first and second isolation members are formed in the recess.
In one embodiment, the pixel defining layer has a top surface formed with a recess, the first isolation member is formed outside the recess, and the second isolation member is formed inside the recess.
The application also provides a display device, which comprises an OLED display panel and a driving chip, wherein the OLED display panel is any one of the OLED display panels.
Has the advantages that: the OLED display panel comprises a driving circuit layer, a plurality of first electrodes, a pixel defining layer, a light-emitting material layer and a second electrode, wherein the plurality of first electrodes are formed on the first side of the driving circuit layer and are mutually independent, the pixel defining layer is formed on the first side of the driving circuit layer, the pixel defining layer is arranged corresponding to an area where the first electrodes are not arranged, a plurality of opening areas exposing the first electrodes are formed, the light-emitting material layer is formed on one side, away from the driving circuit layer, of the first electrodes and comprises a light-emitting layer and a common layer, the light-emitting layer is formed in each opening area, the common layer is formed in each opening area and covers the top surface of the pixel defining layer, the second electrode is formed on one side, away from the driving circuit layer, of the light-emitting material layer and covers the top surfaces of each opening area and the pixel defining layer, the OLED display panel comprises at least one first isolation member and/or at least one second isolation member, the first isolation member and the second isolation member are arranged on the top surface of the pixel defining layer, the first isolation member material and the common layer material are mutually repelled to disconnect the common layer at the first isolation member, the second isolation member material and the second electrode material are mutually repelled to disconnect the second electrode at the second isolation member, and the light transmittance of the second isolation member is greater than that of the second electrode. This application is when being provided with first isolation component, because first isolation component and sharing layer repulse each other, make first isolation component not have the sharing layer in the department, thereby cut off the connection of sharing layer between adjacent sub-pixel, the luminous phenomenon of electric leakage between the adjacent sub-pixel has been alleviated, when being provided with second isolation component, because second isolation component and second electrode repulse each other, make second isolation component not have the second electrode in the department, thereby the area of second electrode in the non-luminescent area of pixel definition layer place has been reduced, the influence of the reflection of second electrode to non-luminescent area luminousness has been reduced, the luminousness of non-luminescent area has been improved, the promotion of display effect can all be realized to any one in first isolation component and the second isolation component in this application promptly.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a film structure of an OLED display panel in the prior art.
Fig. 2 is a schematic view of a first film layer structure of an OLED display panel in an embodiment of the present application.
Fig. 3 is a schematic view of a second film layer structure of an OLED display panel in an embodiment of the present application.
Fig. 4 is a schematic view of a first planar structure of an OLED display panel in an embodiment of the present application.
FIG. 5 is a schematic diagram of a second planar structure of an OLED display panel in an embodiment of the present application
FIG. 6 is a schematic diagram of a first planar structure of two of the repeat units of FIG. 5.
FIG. 7 is a schematic diagram of a second planar structure of two of the repeat units of FIG. 5.
FIG. 8 is a schematic diagram of a third plan view of two of the repeat units of FIG. 5.
FIG. 9 is a schematic diagram of a fourth planar structure of two of the repeat units of FIG. 5.
FIG. 10 is a schematic view of a first film layer structure of a repeating unit.
FIG. 11 is a schematic view of a second film layer structure of repeating units.
FIG. 12 is a schematic view of a third film structure of a repeating unit.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The embodiment of the application provides an OLED display panel and a display device, which are used for relieving the technical problem of poor display effect in the existing OLED display panel.
As shown in fig. 2 and 3, the present application provides an OLED display panel, which includes a driving circuit layer 20, a plurality of first electrodes 30, a pixel defining layer 40, a light emitting material layer, and a second electrode 60, wherein the plurality of first electrodes 30 are formed on a first side of the driving circuit layer 20, the plurality of first electrodes 30 are independent of each other, the pixel defining layer 40 is formed on the first side of the driving circuit layer 20, the pixel defining layer 40 is disposed corresponding to an area where the first electrode 30 is not disposed, a plurality of opening areas exposing the respective first electrodes 30 are formed, the light emitting material layer is formed on a side of the first electrode 30 away from the driving circuit layer 20, and includes a light emitting layer 52 and a common layer, the light emitting layer 52 is formed in each opening area, the common layer is formed in each opening area and covers a top surface of the pixel defining layer 40, the second electrode 60 is formed on a side of the light emitting material layer away from the driving circuit layer and covers each opening area and a top surface of the pixel defining layer 40, the OLED display panel includes at least one first isolation member 71 and/or at least one second isolation member 72, the first isolation member 71 and the second isolation member 72 are disposed on the top surface of the pixel defining layer 40, the first isolation member 71 is made of a material that is repulsive to a common layer material to open the common layer at the first isolation member 71, and the second isolation member 72 is made of a material that is repulsive to the second electrode 60 to open the second electrode 60 at the second isolation member 72.
The OLED display panel further includes a substrate 10, a driving circuit layer 20 formed on the substrate 10, and each of the first electrodes 30 formed on the driving circuit layer 20. The driving circuit layer 20 has a plurality of thin film transistors formed therein, the thin film transistors being connected to each other to form a plurality of pixel driving circuits, and each pixel driving circuit being connected to a corresponding first electrode 30 to supply a driving voltage to the first electrode 30. In the embodiment of the present application, the plurality of first electrodes 30 are independent of each other, and the pixel defining layer 40 is formed in the region where the first electrode 30 is not disposed, that is, the pixel defining layer 40 and each first electrode 30 are formed on the driving circuit layer 20, and the pixel defining layer 40 forms a plurality of opening regions exposing each first electrode 30.
In the direction away from the driving circuit layer 20, the light-emitting material layer sequentially includes a hole injection layer (not shown), a hole transport layer 51, a light-emitting layer 52, an electron transport layer 53, and an electron injection layer (not shown), wherein the light-emitting layer 52 is prepared by a fine mask and is only disposed in each opening region, and at least one of the hole injection layer, the hole transport layer 51, the electron transport layer 53, and the electron injection layer is a common layer, that is, the common layer is prepared in a whole layer manner to reduce the cost of using the fine mask, and the common layer covers the top surface of the pixel defining layer 40 in addition to being disposed in the opening region. The second electrode 60 is also fabricated in a full layer fabrication manner, and thus also covers the opening area and the top surface of the pixel defining layer 40 at the same time.
In each opening region, the first electrode 30, the light emitting material layer and the second electrode 60 form a sub-pixel, when electricity is applied between the first electrode 30 and the second electrode 60, holes and electrons in the light emitting material layer are combined in the light emitting layer 52, and are recombined at a certain probability under the action of coulomb force to form excitons (electron-hole pairs) in an excited state, which are unstable in a normal environment, the excitons in the excited state are recombined and transfer energy to the light emitting material to make the light emitting material transit from a ground state energy level to an excited state, and the energy in the excited state generates photons through a radiation relaxation process to release light energy to generate light, and three primary colors of red, green and blue are generated according to different material formulations of the light emitting layer 52 to form a color display. As shown in fig. 4, the sub-pixels in each opening area may include a first sub-pixel 101, a second sub-pixel 102, and a third sub-pixel 103, each of which is one of a red sub-pixel, a blue sub-pixel, and a green sub-pixel.
The OLED display panel may include only the at least one first partition member 71, only the at least one second partition member 72, and both the at least one first partition member 71 and the at least one second partition member 72. When only the first separating member 71 is disposed, the OLED display panel may have a bottom emission structure in which the first electrode 30 is a cathode and the second electrode 60 is an anode, or a top emission structure in which the first electrode 30 is an anode and the second electrode 60 is a cathode. When the second partition member 72 is provided, the OLED display panel is a top emission structure.
As shown in fig. 2, when the first isolation member 71 is disposed, the first isolation member 71 may be disposed on the top surface of the pixel defining layer 40 and prepared before forming the common layer, and the first isolation member 71 may be formed by a PVD or CVD process and etched. Since the materials of the first isolation member 71 and the common layer repel each other, the common layer prepared in the subsequent whole layer is not formed into a film in the region where the first isolation member 71 is disposed, that is, the common layer is no longer a complete layer, but is broken at the first isolation member 71.
As shown in fig. 3, when the second isolation member 72 is disposed, the second isolation member 72 may be disposed on the top surface of the pixel definition 40 and prepared before the second electrode 60 is formed, and the second isolation member 72 may be formed using a PVD or CVD process and etched. Since the materials of the second separating member 72 and the second electrode 60 repel each other, and the second electrode 60 prepared in a subsequent whole layer does not form a film in the region of the second separating member 72, i.e. the second electrode 60 is no longer a complete layer, but is broken at the second separating member 72.
Fig. 2 and 3 each show a case where only one type of spacer member is provided, but both may be combined, and the first spacer member 71 and the second spacer member 72 may be provided in the same structure.
As shown in fig. 1, in the current OLED display panel, the first and second isolation members 71 and 72 are not provided, and the common layer and the second electrode 60 are all a complete layer. On the one hand, as the resolution of the display panel is improved and the luminous efficiency of the device is improved, high brightness can be realized through low current and low voltage, and then in the common layer, a small amount of current leaked from one sub-pixel to another adjacent sub-pixel can cause the luminous material layer with high luminous efficiency to emit light, thereby affecting the display effect. On the other hand, the opening area where each sub-pixel is located is an emitting area, the area where the pixel defining layer 40 is located is a non-emitting area, and since the second electrode 60 is a complete layer, the second electrode is disposed in both the emitting area and the non-emitting area, and the second electrode 60 generally has a strong reflectivity for light, so that the light transmittance of the entire OLED display panel is low, and the display effect is also affected.
As can be seen from fig. 2 and 3, when the first isolation member 71 is provided, since the first isolation member 71 and the common layer repel each other, the common layer does not exist at the position of the first isolation member 71, so that the connection of the common layer between adjacent sub-pixels is cut off, and the phenomenon of leakage and light emission between adjacent sub-pixels is alleviated; when the second isolation member 72 is disposed, the second isolation member 72 and the second electrode 60 repel each other, so that the second electrode 60 does not exist at the position of the second isolation member 72, the area of the second electrode 60 in the non-light-emitting region where the pixel defining layer 40 is located is reduced, the influence of the reflection of the second electrode 60 in the non-light-emitting region on the light transmittance is greatly reduced, and the light transmittance of the non-light-emitting region is improved, that is, the display effect can be improved by any one of the first isolation member 71 and the second isolation member 72 in the present application. In addition, with the first and second isolation members 71 and 72, a patterned second electrode and a common layer can be obtained without using a fine mask, thus saving material and jig costs.
In one embodiment, the surface energy of the first isolation member 71 is lower than the threshold value, and the material of the first isolation member 71 may be an insulating material with a lower surface energy, such as polytetrafluoroethylene, polyethylene, polypropylene, etc., which has poor adhesion to the material of the common layer, low desorption energy, and mutual repulsion during film formation, so that the common layer is not formed on the first isolation member 71 when formed by evaporation or other processes. The threshold is a critical value or a critical range, and above this value or range, the common layer material will form a film on the first isolation member 71, otherwise it will not.
In one embodiment, as shown in fig. 4, the first isolation member 71 covers the top surface of the pixel defining layer 40, i.e. is disposed in all areas except the opening area, such that the common layer is formed only in the opening area, and the effect of blocking the lateral leakage current is better.
In one embodiment, the Material of the second separator member 72 is a Cathode selective Material (CPM), which is a Material that is selectively deposited only on the Cathode Material, where the CPM Material is present, the Cathode will be difficult to attach, thereby enabling Patterning of the second electrode 60, and the CPM may specifically include BAlq, TAZ, and the like.
In one embodiment, the OLED display panel further includes an auxiliary electrode covering at least a portion of a top surface of the second electrode 60 and electrically connected to the second electrode 60, and the light transmittance of the auxiliary electrode is not less than that of the second electrode 60. In order to increase the light transmittance of the second electrode 60, the thickness of the second electrode 60 is usually made to be thin, which results in a large area resistance of the second electrode 60, and when the OLED display panel operates, a large current flows through the second electrode 60, and a voltage Drop across the second electrode 60 is large, which results in a lower brightness at the middle of the panel than at the periphery, i.e., a voltage Drop (IR-Drop) phenomenon. After the second isolation member 72 is disposed, the IR drop phenomenon may be more serious, and in order to alleviate the IR drop phenomenon, an auxiliary electrode may be disposed, and the auxiliary electrode may cover at least a portion of the top surface of the second electrode and be electrically connected to the second electrode 60, and the auxiliary electrode may reduce the resistance of the second electrode 60, so that the IR drop may be improved, the in-plane voltage may be uniform, and the power consumption may be reduced, and the coverage area of the auxiliary electrode on the top surface of the second electrode 60 may be set according to specific requirements for reducing the resistance. The auxiliary electrode may be directly formed on the second electrode 60, or may be formed first and then laminated on the second electrode 60 by a mechanical or vacuum method. In this application, the luminousness of auxiliary electrode is not less than the luminousness of second electrode 60, and then the luminousness in luminous area can not further be reduced to auxiliary electrode, consequently can make everywhere show luminance in the face even when guaranteeing each sub-pixel luminousness, promote display effect.
The auxiliary electrode may be entirely disposed on the second electrode 60, or a portion of the auxiliary electrode may cover the second electrode 60, or another portion of the auxiliary electrode may be disposed on the top surface of the pixel defining layer 40, the top surface of the pixel defining layer 40 may be a plane, the auxiliary electrode is directly disposed on the plane, or a groove may be disposed on the top surface, and the auxiliary electrode is disposed in the groove, or the like, and a person skilled in the art may selectively set the connection mode, the disposition position, the coverage area, and the like of the auxiliary electrode and the second electrode 60 according to the requirement of reducing IR-drop, as long as the auxiliary electrode and the second electrode 60 can be electrically connected without reducing the light transmittance.
In one embodiment, the OLED display panel includes a plurality of repeating units including a pixel defining layer forming a virtual hexagonal structure and subpixels located at respective vertices of the virtual hexagon, the subpixels at adjacent vertices in the virtual hexagon being different in color, the adjacent repeating units sharing one side of the virtual hexagon and two subpixels at vertices at both ends of the side, the second partition member being disposed inside the virtual hexagon. Fig. 5 shows a structure in which a plurality of repeating units are connected to each other, and fig. 6 shows a structure in which two repeating units are connected to each other, and in conjunction with fig. 5 and 6, each repeating unit is a virtual hexagonal structure formed by the pixel defining layer 40, and each virtual hexagon includes six sides and six vertices at which an opening area is provided, and one sub-pixel is formed in the opening area. For any one repeating unit, the pixel structure comprises a first sub-pixel 101, a second sub-pixel 102 and a third sub-pixel 103, wherein each sub-pixel is one of a red sub-pixel, a blue sub-pixel and a green sub-pixel. In each repeating unit, two adjacent sub-pixels are sub-pixels with different colors. In one embodiment, each repeating unit includes a number ratio of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 of 3:2: 1. Two adjacent repeating units share one side of the virtual hexagon and two sub-pixels on two vertices at two ends of the side, and each repeating unit can be simultaneously adjacent to six other repeating units and connected through the side.
A second partition member 72 is provided inside the virtual hexagon. When the hexagonal structure is adopted, the area of the light emitting area where the sub-pixel is located in the OLED display panel is smaller, and the area of the non-light emitting area where the pixel defining layer 40 is located is larger, so that enough space can be provided for placing the first isolation member 71 and the second isolation member 72, and therefore the effects of improving light transmittance and blocking lateral current leakage are better.
In an embodiment, the second isolation member 72 is also of a hexagonal structure, that is, the second isolation member 72 with an area as large as possible is disposed inside the virtual hexagon, and the area of the remaining second electrode 60 is as small as possible, so that the reflection reducing effect is better, and thus the light transmittance of the non-light emitting area is greatly improved, the transparent display of the whole OLED display panel is realized, and the display effect is improved.
In one embodiment, the first partition member 71 is disposed at least one of inside and side of the virtual hexagon. As shown in fig. 7, the first isolation member 71 may be disposed around the second isolation member 72, or the second isolation member 72 may also be disposed around the first isolation member 71, so that lateral current leakage may not be achieved from the inside of each sub-pixel of the repeating unit. As shown in fig. 8, the first isolation member 71 may be disposed on the side of the virtual hexagon so that lateral current leakage does not occur along the side of the virtual hexagon for each sub-pixel of the repeating unit. As shown in fig. 9, the first isolation member 71 may be disposed both inside and at the side of the virtual hexagon to cut off all paths of the current leakage laterally.
In the above embodiments, the first isolation member 71 and the second isolation member 72 are both disposed on the top surface of the pixel defining layer 40, but they may be disposed in an overlapping manner, that is, the first isolation member 71 is disposed on the top surface of the pixel defining layer 40, and the second isolation member 72 is disposed on the top surface of the first isolation member 71, in which case the first isolation member 71 also needs to have a light transmittance greater than that of the second electrode 60.
In each of the above embodiments, the top surfaces of the pixel defining layers 40 are both planar, and the first and second spacing members 71 and 72 are both disposed on the planar surfaces. In one embodiment, the top surface of the pixel defining layer 40 is formed with a groove, and the first and second isolation members 71 and 72 are disposed in various ways.
When only the second isolation member 72 is provided, as shown in fig. 10, the second isolation member 72 is disposed in the groove, the thickness of the non-light emitting region is reduced by the groove, and the second isolation member 72 has enough accommodation space to be disposed, so that the effect of improving the light transmittance is better. When the first partition member 71 and the second partition member 72 are provided at the same time. As shown in fig. 11, both the first partition member 71 and the second partition member 72 may be formed in the groove. As shown in fig. 12, it is also possible to have the first partition member 71 formed outside the groove and the second partition member 72 formed inside the groove. In one embodiment, the opening of the recess is also hexagonal.
The application also provides a display device, which comprises an OLED display panel and a driving chip, wherein the OLED display panel is the OLED display panel described in any one of the above embodiments. The display device can be equipment with a display function, such as an intelligent watch, a tablet Personal Computer, a notebook Computer, a Personal Computer (PC), a micro processing box and the like, and has a better display effect by arranging the first isolation component and/or the second isolation component in the OLED display panel.
According to the above embodiments:
the application provides an OLED display panel and display device, OLED display panel is when being provided with first isolation component, because first isolation component and sharing layer repulse each other, make first isolation component not exist the sharing layer in place, thereby the connection of sharing layer between adjacent sub-pixel has been cut off, the luminous phenomenon of electric leakage between the adjacent sub-pixel has been alleviated, when being provided with the second isolation component, because second isolation component and second electrode repulse each other, make second isolation component not exist the second electrode in place, thereby the area of second electrode in the non-luminescent area of pixel definition layer place has been reduced, the influence of the reflection of second electrode to the non-luminescent area luminousness has been reduced, the luminousness of non-luminescent area has been improved, the promotion of display effect can all be realized to arbitrary one in first isolation component and the second isolation component in this application promptly.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The OLED display panel and the display device provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the description of the embodiments above is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. An OLED display panel, comprising:
a driving circuit layer;
a plurality of first electrodes formed on a first side of the driving circuit layer, the plurality of first electrodes being independent of each other;
a pixel defining layer formed on a first side of the driving circuit layer, the pixel defining layer being disposed corresponding to an area where the first electrodes are not disposed, and forming a plurality of opening regions exposing the first electrodes;
a light emitting material layer formed on a side of the first electrode away from the driving circuit layer, including a light emitting layer formed in each opening region and a common layer formed in each opening region and covering a top surface of the pixel defining layer;
the second electrode is formed on one side of the light-emitting material layer far away from the driving circuit layer and covers each opening area and the top surface of the pixel defining layer;
wherein the OLED display panel includes at least one first isolation member and/or at least one second isolation member, the first isolation member and the second isolation member being disposed on a top surface of the pixel defining layer, the first isolation member material being repulsive to the common layer material to break the common layer at the first isolation member, the second isolation member material being repulsive to the second electrode material to break the second electrode at the second isolation member.
2. The OLED display panel of claim 1, wherein the surface energy of the first spacer member is below a threshold value.
3. The OLED display panel of claim 1, wherein the material of the second spacer member is a cathode selective material.
4. The OLED display panel of claim 1, further comprising an auxiliary electrode covering at least a portion of a top surface of the second electrode and electrically connected to the second electrode, the auxiliary electrode having a light transmittance not less than that of the second electrode.
5. The OLED display panel according to claim 1, wherein the first electrode, the light emitting material layer, and the second electrode in the opening area form a sub-pixel, the OLED display panel includes a plurality of repeating units including a pixel defining layer forming a virtual hexagonal structure and sub-pixels positioned at respective vertexes of the virtual hexagon, colors of the sub-pixels at adjacent vertexes in the virtual hexagon are different, the adjacent repeating units share one side of the virtual hexagon and two sub-pixels positioned at vertexes at both ends of the side, and the second partition member is disposed inside the virtual hexagon.
6. The OLED display panel of claim 5, wherein the second spacing member is hexagonal in shape.
7. The OLED display panel of claim 5, wherein the first partition member is disposed inside the virtual hexagon and at least one of the side edges.
8. The OLED display panel of claim 7, wherein the pixel defining layer top surface forms a groove, the first and second isolation members each being formed within the groove.
9. The OLED display panel of claim 7, wherein the pixel defining layer has a top surface formed with a groove, the first isolation member is formed outside the groove, and the second isolation member is formed inside the groove.
10. A display device comprising an OLED display panel according to any one of claims 1 to 9 and a driving chip.
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