CN114725179B - OLED display panel and display device - Google Patents
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- CN114725179B CN114725179B CN202210440590.4A CN202210440590A CN114725179B CN 114725179 B CN114725179 B CN 114725179B CN 202210440590 A CN202210440590 A CN 202210440590A CN 114725179 B CN114725179 B CN 114725179B
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- 239000000463 material Substances 0.000 claims abstract description 50
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- 238000002834 transmittance Methods 0.000 claims description 20
- 239000003086 colorant Substances 0.000 claims description 4
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- 230000000694 effects Effects 0.000 abstract description 18
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K50/842—Containers
- H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
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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
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Abstract
The application provides an OLED display panel and a display device, wherein a pixel definition layer is arranged corresponding to a region where a first electrode is not arranged, a plurality of opening regions exposing each first electrode are formed, a luminescent layer in a luminescent material layer is formed in each opening region, a common layer is formed in each opening region and covers the top surface of the pixel definition layer, a second electrode covers the top surface of each opening region and the pixel definition 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 definition layer, the first isolation member material and the common layer material repel each other to enable the common layer to be disconnected at the first isolation member, and the second isolation member material and the second electrode material repel each other to enable the second electrode to be disconnected at the second isolation member. The improvement 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 comprises a plurality of sub-pixels, each sub-pixel comprises an anode, a luminescent material layer and a cathode, wherein the anode, the luminescent material layer and the cathode are arranged in a stacked mode, the luminescent material layer comprises a Hole Transport Layer (HTL), a luminescent layer (EL) and an Electron Transport Layer (ETL), and the luminescent material layer emits light when the cathode and the anode are electrified.
On the one hand, the sub-pixels are separated from each other by the pixel definition layer, in the current manufacturing process, the light-emitting layer is separately arranged corresponding to each sub-pixel, and the hole transport layer and/or the electron transport layer are common layers, and are arranged corresponding to the sub-pixels and the pixel definition layer between the sub-pixels. When the resolution of the display panel is larger, the number of the sub-pixels is also larger, so that the size of the pixel definition layer between the adjacent sub-pixels is smaller and smaller, and when a certain sub-pixel emits light, a small amount of current generated by the pixel definition layer may enter other adjacent sub-pixels along the common layer, so that the sub-pixels which should not emit light, namely, a leakage light emitting phenomenon is generated, and the phenomenon can influence the image display effect of the OLED display panel. On the other hand, the cathode is arranged in the whole layer in the current OLED display panel, the reflectivity of the cathode to light is strong, the light transmittance of the whole 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, which comprises:
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 the first side of the driving circuit layer, the pixel defining layer being disposed corresponding to a region where the first electrode is 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 of the opening regions and a common layer formed in each of the opening regions and covering a top surface of the pixel defining layer;
a second electrode formed on a side of the light emitting material layer away from the driving circuit layer and covering each of the opening regions and a top surface of the pixel defining layer;
wherein 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 being arranged on the top surface of the pixel defining layer, the first isolation member material and the common layer material being mutually exclusive so as to disconnect the common layer at the first isolation member, the second isolation member material and the second electrode material being mutually exclusive so as to disconnect the second electrode at the second isolation member.
In one embodiment, the surface energy of the first spacer member is below a threshold.
In one embodiment, the material of the second separator member is a cathode selection 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 the light transmittance of the auxiliary electrode is not less than the light transmittance of the second electrode.
In one embodiment, the first electrode, the light emitting material layer and the second electrode in the opening region 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 located at each vertex of the virtual hexagon, the sub-pixels at adjacent vertices in the virtual hexagon are different in color, the adjacent repeating units share two sub-pixels on one side of the virtual hexagon and on both ends of the side, and the second isolation member is disposed inside the virtual hexagon.
In one embodiment, the second spacer member is hexagonal in shape.
In one embodiment, the first spacer member is disposed within the virtual hexagon and at least one of the sides.
In one embodiment, the pixel defining layer top surface forms a recess, and the first and second spacer members are both formed within the recess.
In one embodiment, the pixel defining layer top surface forms 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.
The beneficial effects are that: the application provides an OLED display panel and a display device, the OLED display panel includes a drive circuit layer, a plurality of first electrodes, pixel definition layer, luminescent material layer and second electrode, a plurality of first electrodes form in the first side of drive circuit layer and mutually independent, pixel definition layer forms in the first side of drive circuit layer, pixel definition layer corresponds the regional setting of not setting first electrode, form a plurality of opening regions that expose each first electrode, luminescent material layer forms in the first electrode one side of keeping away from drive circuit layer, including luminescent layer and common layer, luminescent layer forms in each opening region, common layer forms in each opening region and covers the top surface of pixel definition layer, the second electrode forms in the luminescent material layer one side of keeping away from drive circuit layer, and cover each opening region and the top surface of pixel definition layer, wherein, OLED display panel includes at least one first isolation component and/or at least one second isolation component, first isolation component and second isolation component set up in pixel definition layer, first isolation component material and common layer material are mutually exclusive, so that the common layer breaks away from at first isolation component and second electrode disconnection in the second isolation component, the second electrode disconnection rate is big in the second electrode, the transmission rate is high. According to the pixel definition layer, when the first isolation component is arranged, the first isolation component and the common layer repel each other, so that the common layer does not exist at the position of the first isolation component, connection of the common layer between adjacent sub-pixels is cut off, leakage and luminescence between the adjacent sub-pixels are relieved, when the second isolation component is arranged, the second electrode does not exist at the position of the second isolation component due to mutual repulsion of the second isolation component and the second electrode, the area of the second electrode in a non-luminous area where the pixel definition layer exists is reduced, the influence of reflection of the second electrode on the light transmittance of the non-luminous area is reduced, and the light transmittance of the non-luminous area is improved, namely any one of the first isolation component and the second isolation component can achieve improvement of display effect.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific 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 diagram of a first film structure of an OLED display panel according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a second film structure of an OLED display panel according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a first planar structure of an OLED display panel according to an embodiment of the present application.
FIG. 5 is a schematic view showing a second planar structure of an OLED display panel according to an embodiment of the present application
Fig. 6 is a schematic view of a first planar structure of two of the repeating units of fig. 5.
FIG. 7 is a schematic view of a second planar structure of two of the repeating units of FIG. 5.
Fig. 8 is a schematic view of a third planar structure of two of the repeating units of fig. 5.
Fig. 9 is a schematic view of a fourth planar structure of two of the repeating units of fig. 5.
FIG. 10 is a schematic diagram of a first film structure of a repeating unit.
FIG. 11 is a schematic diagram of a second film structure of the repeating unit.
FIG. 12 is a schematic diagram 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 will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, 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, the OLED display panel 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, 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 from 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 a region where the first electrodes 30 are not disposed, a plurality of opening regions exposing each of the first electrodes 30 are formed, the light emitting material layer is formed on a side of the first electrodes 30 away from the driving circuit layer 20, the light emitting material layer includes a light emitting layer 52 and a common layer formed in each opening region and covering 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 covering a top surface of each opening region and the pixel defining layer 40, wherein 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 at the first isolation member 72 and the second isolation member 72 are disconnected from the first electrode defining layer 60 at the first isolation member 72, the first isolation member 72 and the second isolation member 72 is separated from the common layer 60.
The OLED display panel further includes a substrate 10, a driving circuit layer 20 is formed on the substrate 10, and each of the first electrodes 30 is 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, each of the pixel driving circuits being connected to a corresponding first electrode 30, respectively, 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 from each other, and the pixel defining layer 40 is formed in the region where the first electrodes 30 are not disposed, that is, the pixel defining layer 40 and each of the first electrodes 30 are formed on the driving circuit layer 20, and the pixel defining layer 40 forms a plurality of opening regions exposing each of the first electrodes 30.
In a 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 plate and is disposed only 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, a whole layer preparation method is adopted during preparation, so that the cost caused by using the fine mask plate is reduced, and the common layer is disposed in the opening region and also covers the top surface of the pixel defining layer 40. The second electrode 60 is also prepared in a whole layer, and thus covers both the opening area and the top surface of the pixel defining layer 40.
In each of the open areas, the first electrode 30, the light-emitting material layer and the second electrode 60 form a sub-pixel, when the first electrode 30 and the second electrode 60 are energized, holes and electrons in the light-emitting material layer are combined in the light-emitting layer 52, and are combined with 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, and the excitons in the excited state combine and transfer energy to the light-emitting material to make it transition from a ground state energy to an excited state, and the excited state energy generates photons through a radiation relaxation process to release light energy, so as to generate light, and red, green and blue three primary colors are generated according to the material formulation 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 be provided with only at least one first barrier member 71, only at least one second barrier member 72, and at least one first barrier member 71 and at least one second barrier member 72. When only the first barrier member 71 is provided, the OLED display panel may be 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 spacer 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 provided, the first isolation member 71 may be provided on the top surface of the pixel defining layer 40 and prepared before the common layer is formed, and the first isolation member 71 may be formed and etched using PVD or CVD process. Since the first spacer member 71 and the material of the common layer repel each other, the common layer prepared in the subsequent whole layer does not form a film in the area where the first spacer member 71 is provided, i.e., the common layer is not a complete one but is broken at the first spacer member 71.
When the second isolation member 72 is provided, the second isolation member 72 may be provided 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 and etched using PVD or CVD process, as shown in fig. 3. Since the second spacer member 72 and the material of the second electrode 60 repel each other, and the subsequent full layer of the prepared second electrode 60 does not form a film in the area of the second spacer member 72, i.e. the second electrode 60 is no longer a complete layer but is broken at the second spacer member 72.
Fig. 2 and 3 each show a case where only one type of spacer member is provided, but the first spacer member 71 and the second spacer member 72 may be provided at the same time in the same structure by combining them.
As shown in fig. 1, in the current OLED display panel, the first and second barrier members 71 and 72 are not provided, and the common layer and the second electrode 60 are all one layer. On the one hand, with the improvement of resolution of the display panel and the improvement of luminous efficiency of the device, high brightness can be realized by low current and low voltage, and a small amount of current leaked from one sub-pixel to another adjacent sub-pixel in the common layer can cause the luminous material layer with high luminous efficiency to emit light, thereby influencing the display effect. On the other hand, the opening area where each sub-pixel is located is a light emitting area, and the area where the pixel defining layer 40 is located is a non-light emitting area, and since the second electrode 60 is a complete layer, the second electrode is disposed in both the light emitting area and the non-light emitting area, and the reflectivity of the second electrode 60 to light is usually strong, so that the light transmittance of the whole 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, the first isolation member 71 repels the common layer, so that the common layer does not exist at the position of the first isolation member 71, thereby cutting off the connection between the adjacent sub-pixels and relieving the phenomenon of leakage and luminescence between the adjacent sub-pixels; 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 in the second isolation member 72, thereby reducing the area of the second electrode 60 in the non-light-emitting region where the pixel defining layer 40 is located, greatly reducing the influence of the reflection of the second electrode 60 in the non-light-emitting region on the light transmittance, and improving the light transmittance of the non-light-emitting region, i.e. any one of the first isolation member 71 and the second isolation member 72 in the present application can achieve the improvement of the display effect. Further, with the first and second spacer members 71 and 72, the patterned second electrode and 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 lower surface energy, such as polytetrafluoroethylene, polyethylene, polypropylene, etc., which has poor adhesion to the material of the common layer and low desorption energy, and is mutually repelled during the film forming process, so that the common layer is not formed on the first isolation member 71 when the common layer is formed by vapor deposition or other processes. The threshold is a critical value or range beyond which the common layer material will form a film on the first spacer member 71, and vice versa.
In one embodiment, as shown in fig. 4, the first isolation member 71 covers the top surface of the pixel defining layer 40, that is, is disposed in all areas except the opening area, in such a manner that the common layer is formed only in the opening area, the effect of blocking the lateral leakage current is better.
In one embodiment, the material of the second spacer member 72 is a cathode selective material (Cathode Patterning Material, CPM), which is a material that is selectively deposited only on the cathode material, where the cathode will be difficult to adhere, such that patterning of the second electrode 60 can be achieved, the CPM may include, in particular, BAlq, TAZ, etc.
In one embodiment, the OLED display panel further includes an auxiliary electrode covering at least a portion of the 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 the light transmittance 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 very thin, which results in a large area resistance of the second electrode 60, and when the OLED display panel is operated, a large current flows through the second electrode 60, so that a voltage Drop across the second electrode 60 is large, which results in a lower brightness in the middle of the panel than in the periphery, i.e., a voltage Drop (IR-Drop) phenomenon is generated. After the second isolation member 72 is disposed, the IR-drop phenomenon may be more serious, and in order to alleviate the phenomenon, an auxiliary electrode may be disposed, which may cover at least a portion of the top surface of the second electrode and be electrically connected to the second electrode 60, and may reduce the resistance of the second electrode 60, thereby improving the IR-drop, making the in-plane voltage uniform, and reducing the power consumption, 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 prepared on the second electrode 60, or may be prepared first and then pressed onto the second electrode 60 by mechanical or vacuum means. In the application, the light transmittance of the auxiliary electrode is not less than that of the second electrode 60, so that the auxiliary electrode does not further reduce the light transmittance of the light emitting region, and therefore the light transmittance of each sub-pixel is ensured, and meanwhile, the brightness of each display in the plane is uniform, and the display effect is improved.
The auxiliary electrode may be disposed on the second electrode 60 entirely, or may partially cover the second electrode 60, and another portion may be disposed on the top surface of the pixel defining layer 40, where the top surface of the pixel defining layer 40 may be a plane, the auxiliary electrode may be disposed directly on the plane, or may be disposed in a groove, and the auxiliary electrode may be disposed in the groove, which may be selectively disposed by a person skilled in the art according to the requirement of reducing IR-drop, so long as the auxiliary electrode and the second electrode 60 can be electrically connected and the light transmittance is not reduced.
In one embodiment, the OLED display panel includes a plurality of repeating units including a pixel defining layer forming a virtual hexagonal structure and sub-pixels located at respective vertices of the virtual hexagon, the sub-pixels at adjacent vertices in the virtual hexagon having different colors, the adjacent repeating units sharing one side of the virtual hexagon and two sub-pixels at vertices at both ends of the side, and the second barrier member is disposed inside the virtual hexagon. Fig. 5 shows a structure in which a plurality of repeating units are connected to each other, fig. 6 shows a structure in which two repeating units are connected to each other, and in combination with fig. 5 and 6, each repeating unit is a virtual hexagonal structure formed of a pixel defining layer 40, the virtual hexagonal structure includes six sides and six vertices, opening areas are provided at the six vertices, and one sub-pixel is formed in the opening area. For any one of the repeating units, it includes a first sub-pixel 101, a second sub-pixel 102 and a third sub-pixel 103, 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 of 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, one side of the common virtual hexagon and two sub-pixels on the vertexes of the two ends of the side, each repeating unit can be adjacent to six other repeating units at the same time and connected through the side.
A second spacer member 72 is provided inside the virtual hexagon. When the hexagonal structure is adopted, the area of the light emitting region where the sub-pixels are located in the OLED display panel is smaller, and the area of the non-light emitting region 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, thereby improving the light transmittance and blocking the lateral current leakage.
In one embodiment, the second isolation member 72 is also in a hexagonal structure, that is, the second isolation member 72 with the largest area is disposed in the virtual hexagon, so that the area of the remaining second electrode 60 is as small as possible, and the effect of reducing reflection is better, thereby greatly improving the light transmittance of the non-light-emitting area, realizing transparent display of the whole OLED display panel, and improving the display effect.
In one embodiment, the first isolation member 71 is disposed at least one of inside and sides of the virtual hexagon. As shown in fig. 7, the first spacer member 71 may be disposed around the second spacer member 72, or the second spacer member 72 may be disposed around the first spacer member 71 so that each sub-pixel of the repeating unit may not realize lateral current leakage from inside. As shown in fig. 8, the first isolation member 71 may be disposed on a side of the virtual hexagon so that each sub-pixel of the repeating unit does not generate lateral current leakage along the side of the virtual hexagon. As shown in fig. 9, the first isolation member 71 may be disposed at the inside and side of the virtual hexagon at the same time to cut off the path of all current lateral leakage.
In each of the above embodiments, the first isolation member 71 and the second isolation member 72 are simultaneously disposed on the top surface of the pixel defining layer 40, but it is also possible to dispose the first isolation member 71 on the top surface of the pixel defining layer 40 and the second isolation member 72 on the top surface of the first isolation member 71, and the first isolation member 71 needs to have a light transmittance larger than that of the second electrode 60.
In each of the above embodiments, the top surface of the pixel defining layer 40 is a plane, and the first and second spacer members 71 and 72 are disposed on the plane. 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 spacer member 72 is provided, as shown in fig. 10, the second spacer member 72 is provided in a groove that makes the thickness of the non-light emitting region thin, and the second spacer member 72 has a sufficient accommodation space to be provided, so that the effect of improving light transmittance is good. When the first spacer member 71 and the second spacer member 72 are provided at the same time. As shown in fig. 11, the first and second spacer members 71 and 72 may be both formed in the grooves. As shown in fig. 12, the first spacer member 71 may be formed outside the groove, and the second spacer member 72 may be formed inside the groove. In one embodiment, the openings of the grooves are 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 in any embodiment. The display device can be devices with display functions such as a smart watch, a tablet personal computer, a notebook computer, a personal computer (PC, personal Computer), 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.
As can be seen from 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 is mutually exclusive with the common layer for there is not the common layer in first isolation component place, thereby the connection of common 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 is mutually exclusive with the second electrode, make second isolation component place not have the second electrode, thereby the area of second electrode in the non-luminous district that the pixel definition layer is located has been reduced, the influence of the reflection of second electrode to non-luminous district luminousness has been reduced, the luminousness in non-luminous district has been improved, namely the promotion of display effect can all be realized to any one in first isolation component and the second isolation component in this application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description has been made in detail on an OLED display panel and a display device provided in the embodiments of the present application, and specific examples are applied herein to illustrate principles and implementations of the present application, where the description of the above embodiments is only for helping to understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (6)
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 the first side of the driving circuit layer, the pixel defining layer being disposed corresponding to a region where the first electrode is 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 of the opening regions and a common layer formed in each of the opening regions and covering a top surface of the pixel defining layer; the common layer is a film layer prepared by adopting a whole layer preparation mode;
a second electrode formed on a side of the light emitting material layer away from the driving circuit layer and covering each of the opening regions and a top surface of the pixel defining layer;
wherein the OLED display panel includes at least one first and at least one second spacer member disposed on the top surface of the pixel defining layer, the first spacer member material and the common layer material being mutually exclusive to cause the common layer to be disconnected at the first spacer member, the second spacer member material and the second electrode material being mutually exclusive to cause the second electrode to be disconnected at the second spacer member; the common layer is not arranged in the area where the first isolation component is arranged;
the OLED display panel further comprises an auxiliary electrode, wherein the auxiliary electrode covers at least part of the top surface of the second electrode and is electrically connected with the second electrode, and the light transmittance of the auxiliary electrode is not less than that of the second electrode;
the top surface of the pixel definition layer is provided with a groove, the second isolation member is formed in the groove, and the second isolation member is hexagonal in shape;
the OLED display panel comprises a plurality of repeating units, wherein each repeating unit comprises a pixel definition layer forming a virtual hexagon structure and sub-pixels positioned at each vertex of the virtual hexagon, the colors of the sub-pixels at adjacent vertices in the virtual hexagon are different, each adjacent repeating unit shares one side edge of the virtual hexagon and two sub-pixels at the vertices at two ends of the side edge, and the second isolation member is arranged inside the virtual hexagon;
the second isolation member is arranged inside the virtual hexagon, the first isolation member is arranged around the second isolation member, the first isolation member is arranged inside the virtual hexagon and at the side edge, and the part of the first isolation member arranged inside the virtual hexagon is connected with the part of the first isolation member arranged at the side edge of the virtual hexagon.
2. The OLED display panel of claim 1, wherein the first spacer member has a surface energy below a threshold value.
3. The OLED display panel of claim 1, wherein the material of the second spacer member is a cathode selection material.
4. The OLED display panel of claim 1, wherein the first spacer member is formed within the recess.
5. The OLED display panel of claim 1, wherein the first spacer member is formed outside the recess.
6. A display device comprising an OLED display panel and a driver chip, wherein the OLED display panel is an OLED display panel according to any one of claims 1 to 5.
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