CN114122084B - Top-emitting OLED display panel - Google Patents
Top-emitting OLED display panel Download PDFInfo
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- CN114122084B CN114122084B CN202111321971.2A CN202111321971A CN114122084B CN 114122084 B CN114122084 B CN 114122084B CN 202111321971 A CN202111321971 A CN 202111321971A CN 114122084 B CN114122084 B CN 114122084B
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- 239000000758 substrate Substances 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 134
- 239000002346 layers by function Substances 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 abstract description 23
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005012 migration Effects 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 239000002096 quantum dot Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
-
- 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
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
-
- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application provides a top-emission OLED display panel, which comprises an array substrate, a flat layer and a plurality of light-emitting devices, wherein the flat layer is provided with a plurality of grooves, the light-emitting devices comprise anodes, the anodes comprise transparent electrode layers and reflecting layers, the anodes of the adjacent light-emitting devices are physically separated by the grooves, at least one groove is arranged between the adjacent light-emitting devices, the anodes comprise a first part positioned on the surface of the flat layer and a second part extending to a single side of the groove, and the second parts of the adjacent anodes are arranged in the grooves in a non-conduction way; by arranging grooves in the flat layers between the adjacent light emitting devices, anodes of the adjacent light emitting devices are separated in two dimensions, adjacent ends of the reflecting layers of the two adjacent light emitting devices are located in different layers, and continuous passages are difficult to form between anodes of the adjacent light emitting devices by increasing the length of the longitudinal diffusion path of the reflecting layers under the condition that the diffusion path of the reflecting layers is limited when the diffusion path of the reflecting layers is increased in the horizontal direction.
Description
Technical Field
The application relates to the technical field of display, in particular to a top-emitting OLED display panel.
Background
Referring to fig. 1, the main development direction of the OLED back plate is top emission, the anode of the top emission OLED display panel includes a layer of reflective metal, and the most widely used reflective material is the reflective material at present due to the high reflectivity of Ag, but the passivation oxide film cannot be formed due to the instability of Ag itself, so that Ag migration phenomenon occurs due to the influence of water vapor and potential difference when the anode of the adjacent sub-pixels works, and the Ag is accumulated in the form of Ag2O, is in a dispersed colloid, and finally causes short circuit between adjacent pixels, thereby affecting the display quality.
The probability of such short circuits is mainly reduced by increasing the distance, but as the resolution of the product is higher and higher, the distance of the single dimension is very limited, and the probability of adjacent pixels on the same horizontal plane to migrate and conduct is higher.
Therefore, the existing top-emission OLED display panel has a technical problem that anode reflective layers of adjacent light emitting devices overlap to be short-circuited.
Disclosure of Invention
The embodiment of the application provides a top-emission OLED display panel, which can be used for solving the technical problem that the anode reflecting layers of adjacent light emitting devices are lapped to cause short circuit in the existing top-emission OLED display panel.
The embodiment of the application provides a top-emitting OLED display panel, which comprises:
An array substrate;
A planar layer provided with a plurality of grooves;
the light-emitting devices are arranged on the flat layer and comprise anodes, light-emitting functional layers and cathodes, and the anodes comprise transparent electrode layers and reflecting layers;
Wherein the grooves physically separate anodes of adjacent light emitting devices, at least one groove is arranged between adjacent light emitting devices, the anodes comprise a first part positioned on the surface of the flat layer and a second part extending to a single side of the groove, and the second part of the adjacent anodes is arranged in the groove in a non-conductive way.
Optionally, in some embodiments of the present application, the light emitting device includes a first light emitting device, a second light emitting device, and a third light emitting device, at least one groove is disposed between adjacent first light emitting device/second light emitting device/third light emitting device, and at least one groove is disposed between adjacent first light emitting device and second light emitting device, adjacent second light emitting device and third light emitting device, and adjacent third light emitting device and first light emitting device.
Optionally, in some embodiments of the application, the grooves are disposed through the planar layer.
Optionally, in some embodiments of the application, the depth of the groove is less than the thickness of the planar layer.
Optionally, in some embodiments of the application, the grooves are arranged in a step shape.
Optionally, in some embodiments of the present application, two grooves are disposed between any adjacent light emitting devices, and the grooves include a first groove and a second groove, and the first groove and the second groove are disposed near the light emitting devices on two sides respectively.
Alternatively, in some embodiments of the application, the first groove and the second groove are of equal depth.
Optionally, in some embodiments of the present application, three grooves are disposed between any adjacent light emitting devices, the grooves include a first groove, a second groove, and a third groove, the first groove and the second groove are disposed near the light emitting devices on two sides, respectively, and the third groove is disposed in a central position of the adjacent light emitting devices.
Optionally, in some embodiments of the application, the depth of the third groove is greater than the depth of the first groove and the second groove.
Optionally, in some embodiments of the present application, a blocking member is further disposed between adjacent light emitting devices, and the blocking member is configured to block the first portion and the second portion from contacting.
The top-emitting OLED display panel provided by the embodiment of the application comprises an array substrate, a flat layer and a plurality of light emitting devices, wherein the flat layer is provided with a plurality of grooves, the light emitting devices are arranged on the flat layer, the light emitting devices comprise anodes, light emitting function layers and cathodes, the anodes comprise transparent electrode layers and reflecting layers, at least one groove is arranged between every two adjacent light emitting devices, the reflecting layer on one side of any groove comprises a first part arranged in the groove, the reflecting layer on the other side of the groove comprises a second part close to the groove, the second part is arranged on the flat layer, and the first part and the second part are positioned on different layers; by arranging grooves in the flat layers between the adjacent light emitting devices, anodes of the adjacent light emitting devices are separated in two dimensions, adjacent ends of the reflecting layers of the two adjacent light emitting devices are located in different layers, and continuous passages are difficult to form between anodes of the adjacent light emitting devices by increasing the length of the longitudinal diffusion path of the reflecting layers under the condition that the diffusion path of the reflecting layers is limited when the diffusion path of the reflecting layers is increased in the horizontal direction.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a prior art top-emitting OLED display panel;
FIG. 2 is a schematic top view of each sub-pixel of a top-emitting OLED display panel according to the present application;
FIG. 3 is a schematic cross-sectional view of a top-emitting OLED display panel according to the present application at position A-A in FIG. 2;
FIG. 4 is a schematic cross-sectional view of a second type of top-emitting OLED display panel provided in the present application at position A-A in FIG. 2;
FIG. 5 is a schematic cross-sectional view of a third embodiment of a top-emitting OLED display panel according to the present application at position A-A in FIG. 2;
FIG. 6 is a fourth cross-sectional schematic view of a top-emitting OLED display panel provided in the present application at position A-A in FIG. 2;
FIG. 7 is a fifth cross-sectional schematic view of a top-emitting OLED display panel provided in the present application at position A-A in FIG. 2;
fig. 8a to 8d are schematic structural views of a method for manufacturing a top-emitting OLED display panel according to the present application;
Fig. 9 is a schematic flow chart of a method for manufacturing a top-emitting OLED display panel according to the present application.
Reference numerals illustrate:
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
Referring to fig. 2 and 3, the present application provides a top-emitting OLED display panel, which includes an array substrate 101, a flat layer 102, and a plurality of light emitting devices 10, wherein the flat layer 102 is provided with a plurality of grooves 103, the light emitting devices 10 are disposed on the flat layer 102, the light emitting devices 10 include an anode 104, a light emitting functional layer 107, and a cathode 106, the anode 104 includes a transparent electrode layer 1041 and a reflective layer 1042, wherein the grooves 103 physically separate the anodes 104 of adjacent light emitting devices 10, at least one groove 103 is disposed between adjacent light emitting devices 10, the anode 104 includes a first portion 20 located on a surface of the flat layer 102, and a second portion 30 extending to a single side of the groove 103, and the second portion 30 adjacent to the anode 104 is disposed in a non-conductive manner in the groove 103.
The present application makes it difficult to form a continuous path between the anodes 104 of the adjacent light emitting devices 10 by providing the grooves 103 in the flat layer 102 between the adjacent light emitting devices 10, two-dimensionally separating the anodes 104 of the adjacent light emitting devices 10 so that adjacent ends of the reflective layers 1042 of the two adjacent light emitting devices 10 are located in different layers, and increasing the diffusion path length of the reflective layers 1042 in the horizontal direction while increasing the diffusion path length of the reflective layers 1042 in the longitudinal direction.
Wherein at least one groove 103 is disposed between adjacent light emitting devices 10, the reflective layer 1042 on one side of any groove 103 includes a first portion 20 disposed in the groove 103, the reflective layer 1042 on the other side of the groove 103 includes a second portion 30 adjacent to the groove 103, the second portion 30 is disposed on the flat layer 102, and the first portion 20 and the second portion 30 are disposed on different layers.
The grooves 103 are disposed in the flat layer 102, and are used for separating the anodes 104 adjacent to the light emitting device 10, so as to prevent the reflective layer 1042 of the anodes 104 from diffusing to form a path, thereby avoiding the occurrence of short circuit.
The light emitting functional layer 107 includes a hole injection layer, a hole transport layer, a quantum dot light emitting layer, an electron transport layer, and an electron injection layer.
The reflective layer 1042 may be made of silver, and the transparent electrode layer 1041 may be made of indium tin oxide.
Wherein the first portion 20 is located in the groove 103, the second portion 30 is located on the flat layer 102, any light emitting device 10 includes the first portion 20 and the second portion 30, and the first portion 20 and the second portion 30 are arranged periodically.
Wherein either side of the recess 103 includes a first portion 20 and a second portion 30.
It is noted that the migration or diffusion of the reflective layer 1042 is an abnormal extension, and the extension portion of the light emitting device 10 is easy to overlap with the reflective layer 1042 of the adjacent light emitting device 10, so as to cause short circuit; the reflective layers 1042 of the adjacent light emitting devices 10 are positioned on different layers, so that the length of a longitudinal diffusion path is increased, the technical effect of avoiding short circuits of the adjacent light emitting devices 10 is achieved, meanwhile, the distance between adjacent sub-pixels and pixels can be set smaller, and the technical effect of the PPI of the top-emission OLED display panel is improved.
The technical scheme of the present application will now be described with reference to specific embodiments.
Referring to fig. 3, a schematic cross-sectional view of a top-emitting OLED display panel according to the present application is shown.
The top-emission OLED display panel includes a plurality of light emitting devices 10, wherein the light emitting devices 10 include a first light emitting device 10, a second light emitting device 10, and a third light emitting device 10, at least one groove 103 is disposed between adjacent first light emitting device 10/second light emitting device 10/third light emitting device 10, and at least one groove 103 is disposed between adjacent first light emitting device 10 and second light emitting device 10, adjacent second light emitting device 10 and third light emitting device 10, adjacent third light emitting device 10, and first light emitting device 10.
Wherein the first light emitting device 10 emits red light, the second light emitting device 10 emits blue light, the third light emitting device 10 emits green light, specifically, the first light emitting device 10 includes a first light emitting functional layer 107, the first light emitting functional layer 107 includes a red quantum dot light emitting layer, the second light emitting device 10 includes a second light emitting functional layer 107, the second light emitting functional layer 107 includes a blue quantum dot light emitting layer, the third light emitting device 10 includes a third light emitting functional layer 107, and the third light emitting functional layer 107 includes a green quantum dot light emitting layer.
It is understood that at least one of the grooves 103 is disposed between adjacent light emitting devices 10 having different light emitting colors, and at least one of the grooves 103 is disposed between adjacent light emitting devices 10 having the same light emitting color.
It can be understood that the reflective material of the reflective layer 1042 may have diffusion or migration under the influence of water vapor and potential difference, that is, the end surface of the reflective layer may grow or extend, specifically, taking the reflective material as Ag, for example, when Ag is hydrolyzed with water to form ag+, the water vapor itself may be ionized, the OH-is obtained by ionization of H 2 O- & gth++ OH-, the ag+ may move from the high potential area to the low potential and be easily combined with the low potential to form AgOH, the AgOH is decomposed and finally accumulated in the form of Ag 2 O, and the Ag 2 O is in dispersion colloid, so that the reflective layer 1042 is easily affected by external factors to cause diffusion thereof; compared with the prior art, the application can make the distance between the adjacent light emitting devices 10 smaller and the distance between the adjacent pixels smaller by increasing the distance between the adjacent light emitting devices 10 by arranging the grooves 103 between the adjacent light emitting devices 10, thereby increasing the length of the diffusion path of the reflective layer 1042.
In some embodiments, the grooves 103 are at least disposed in the flat layer 102, and the grooves 103 may also be disposed on the array substrate 101, for example: in one embodiment, the recess 103 is disposed through the planar layer 102, and the recess 103 is disposed in the passivation layer.
It is understood that the recess 103 may extend through the passivation layer or the recess 103 may have a depth less than the sum of the thickness of the planar layer 102 and the thickness of the passivation layer; the groove 103 is set according to actual requirements, and the depth of the groove 103 is not specifically limited herein, so long as the normal display of the top-emitting OLED display panel can be satisfied.
In one embodiment, between any adjacent light emitting devices 10, at most one anode 104 of the light emitting devices 10 extends and is disposed in the recess 103.
It will be appreciated that when the anode 104 of any one of the adjacent light emitting devices 10 is disposed in the recess 103 in an extended manner, the diffusion path of the anode 104 reflective layer 1042 of the other light emitting device 10 increases and it is more difficult to form a continuous path, thereby avoiding the risk of short-circuiting the adjacent anode 104.
It should be noted that any of the grooves 103 has only one end of the anode 104 of the light emitting device 10 disposed therein, and if both ends are disposed in the groove 103, the technical effect of avoiding the short circuit of the adjacent light emitting devices 10 cannot be achieved.
It should be noted that the reflective material of the reflective layer 1042 has a diffusion or migration property under specific conditions, and the reflective layer 1042 is used for reflecting the light of the light emitting layer to realize top emission, so that when the anode 104 is disposed in the groove 103, the reflective layer 1042 may not be disposed in the groove 103.
Referring to fig. 4 and 5, in some embodiments, a plurality of grooves 103 are disposed between the adjacent light emitting devices 10.
Referring to fig. 4, in one embodiment, two grooves 103 are disposed between any adjacent light emitting devices 10, and the grooves 103 include a first groove 1031 and a second groove 1032.
Wherein the first recess 1031 and the second recess 1032 may be disposed near the light emitting devices 10 of both sides, respectively.
Wherein the first recess 1031 and the second recess 1032 may have the same depth.
Referring to fig. 5, in one embodiment, three grooves 103 are disposed between any adjacent light emitting devices 10, and the grooves 103 include a first groove 1031, a second groove 1032, and a third groove 1033.
Wherein the first and second grooves 1031 and 1032 may be disposed near the light emitting devices 10 of both sides, respectively, and the third groove 1033 may be disposed at a central position adjacent to the light emitting devices 10.
Wherein, the depth of the third groove 1033 may be greater than the depths of the first groove 1031 and the second groove 1032.
The first grooves 1031 and the second grooves 1032 may be symmetrically disposed with respect to the third grooves 1033.
It should be noted that, by providing a plurality of grooves 103, the longitudinal diffusion distance of the reflective layer 1042 can be further increased, so that the anode 104 of the adjacent light emitting device 10 is prevented from overlapping to form a path, which causes a short circuit.
It is to be understood that the number of the grooves 103 between the adjacent light emitting devices 10 may be 4, 5, etc., without limitation; in this embodiment, in the case where the thickness of the flat layer 102 is constant, by increasing the number of grooves 103, the longitudinal path length is further increased, so that the anode 104 reflective layer 1042 adjacent to the light emitting device 10 is more difficult to overlap, thereby further avoiding the occurrence of short circuit.
Meanwhile, by providing a plurality of grooves 103 in the flat layer 102, stress is released through the grooves 103, and the bending resistance of the display panel can be further improved.
In one embodiment, the groove 103 may be further disposed in a non-display area, where the groove 103 has an effect of blocking moisture intrusion or extending a moisture intrusion path.
Referring to fig. 6 and 7, in some embodiments, the shape and size of the recess 103 may also have a gain effect on extending the path of the reflective layer 1042.
For example, in one embodiment, the grooves 103 are disposed through the planar layer 102.
Referring to fig. 6, in one embodiment, the depth of the recess 103 is smaller than the thickness of the planarization layer 102.
Referring to fig. 7, in an embodiment, the grooves 103 are arranged in a step shape, and the length of the side wall of the step shape is greater than the depth of the grooves 103, so that the diffusion path side length of the reflective layer 1042 is longer, thereby further alleviating the technical problem of short circuit between adjacent light emitting devices 10.
It will be appreciated that when the depth of the recess 103 is less than the thickness of the flat layer 102, the diffusion path reserved for the reflective layer 1042 of the adjacent light emitting device 10 is relatively short, and when the depth of the recess 103 is equal to the thickness of the flat layer 102, the diffusion path is longer than when the depth of the recess 103 is less than the thickness of the flat layer 102; thus, preferably, the present application employs grooves 103 disposed through the planar layer 102.
Meanwhile, the grooves 103 penetrating the flat layer 102 are easier to realize in the process, and can be prepared by full exposure and development; when the depth of the groove 103 is smaller than the thickness of the flat layer 102, the exposure and development time, the light intensity, and other factors need to be controlled, so that the groove 103 can have a technical effect of simplifying the process when penetrating the flat layer 102.
It should be noted that the shape of the recess 103 further includes a trapezoid, and the forming of the sidewall of the recess 103 further includes an arc shape and a streamline shape, and the above limitation is only required to extend the length of the diffusion path, and the length of the extended sidewall is greater than the depth of the recess 103, which is not limited herein.
In one embodiment, a barrier is further provided between adjacent light emitting devices 10, the barrier being for blocking contact between the first portion 20 and the second portion 30.
In this embodiment, by providing the barrier member between the adjacent light emitting devices 10, the technical effect of blocking the reflective layer 1042 from extending to overlap the reflective layer 1042 of the adjacent light emitting device 10 is achieved.
Referring to fig. 8a to 8d and fig. 9, the present application further provides a method for manufacturing a top-emitting OLED display panel, which includes:
S1: referring to fig. 8a, an array substrate 101 is provided, a flat layer 102 is prepared on the array substrate 101, and a groove 103 is formed in the flat layer 102;
s2: referring to fig. 8b, an anode 104 is formed on the flat layer 102 at two sides of the groove 103, wherein the anode 104 includes a transparent electrode layer 1041 and a reflective layer 1042, and adjacent end surfaces of adjacent reflective layers 1042 are located at different layers;
s3: referring to fig. 8c, a pixel defining layer 105 is formed on the anode 104;
s4: referring to fig. 8d, a light emitting function layer 107 is prepared between the pixel definition layers 105, and a cathode 106 is prepared over the pixel definition layers 105 and the light emitting function layer 107.
It should be noted that the grooves 103 are formed between the adjacent light emitting devices 10, and are used for extending the diffusion path of the anode 104 reflective layer 1042, so as to avoid the short circuit caused by overlapping of the anode 104 reflective layers 1042 of different light emitting devices 10.
In one embodiment, the grooves 103 are configured to be stepped, specifically, the stepped grooves 103 are prepared by etching twice, and the apertures of the two etches are different.
Wherein, the center lines of the apertures formed by the two etching distributions can be coincident.
It should be noted that, in the top-emitting OLED display panel and the method for manufacturing the same, the adjacent end surfaces of the adjacent reflective layers 1042 are located in different layers, so as to achieve the technical effect of reducing the risk of short circuit.
It will be appreciated that the second portion 30 of the reflective layer 1042 disposed on the planar layer 102 extends or migrates or diffuses in a horizontal direction, while the first portion 20 of the reflective layer 1042 is disposed in the groove 103 and extends or migrates or diffuses upward along the sidewall of the groove 103, so that the deeper the groove 103, the harder it is for the first portion 20 of one reflective layer 1042 to form a continuous overlapping path with the second portion 30 of an adjacent reflective layer 1042.
The application also provides a top-emitting OLED display panel and a preparation method of the top-emitting OLED display panel, wherein the top-emitting OLED display panel can be an LTPS display panel, an oxide semiconductor display panel or LTPO display panel.
The top-emitting OLED display panel provided by the embodiment comprises an array substrate, a flat layer and a plurality of light emitting devices, wherein the flat layer is provided with a plurality of grooves, the light emitting devices are arranged on the flat layer, each light emitting device comprises an anode, a light emitting functional layer and a cathode, each anode comprises a transparent electrode layer and a reflecting layer, the grooves are used for physically separating the anodes of the adjacent light emitting devices, at least one groove is arranged between the adjacent light emitting devices, each anode comprises a first part positioned on the surface of the flat layer, a second part extending to one side of each groove, and the second parts of the adjacent anodes are arranged in the grooves in a non-conductive manner; by arranging grooves in the flat layers between the adjacent light emitting devices, anodes of the adjacent light emitting devices are separated in two dimensions, adjacent ends of reflecting layers of the two adjacent light emitting devices are located on different layers, and under the condition that the diffusion path of the reflecting layers is limited due to the increase of the longitudinal diffusion path length of the reflecting layers in the horizontal direction, continuous passages are difficult to form between the anodes of the adjacent light emitting devices, so that the technical problem that short circuits occur in the anode reflecting layers of the adjacent light emitting devices in the conventional top-emission OLED display panel is solved.
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 a top-emitting OLED display panel and a method for manufacturing the same provided in the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the above description of the examples is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (5)
1. A top-emitting OLED display panel, comprising:
An array substrate;
A planar layer provided with a plurality of grooves;
The light-emitting devices are arranged on the flat layer and comprise anodes, light-emitting functional layers and cathodes, wherein the anodes comprise transparent electrode layers and reflecting layers, and the reflecting layers are made of silver;
Wherein the grooves physically separate anodes of adjacent light emitting devices, at least one groove is arranged between the adjacent light emitting devices, the anode comprises a first part positioned on the surface of the flat layer and a second part extending to a single side of the groove, the second part of the adjacent anode is arranged in the groove in a non-conductive way, the groove is arranged in a step shape, one end of the second part in the groove is arranged at the bottom of the groove, the length of the stepped side wall is greater than the depth of the groove, a blocking piece is further arranged between every two adjacent light emitting devices and used for blocking the first part from contacting with the second part, three grooves are formed between every two adjacent light emitting devices, the blocking piece is arranged between every two adjacent grooves, the preparation materials of the blocking piece are the same as those of the flat layer, and the height of the blocking piece is equal to that of the flat layer.
2. The top-emitting OLED display panel of claim 1, wherein the grooves are disposed through the planar layer.
3. The top-emitting OLED display panel of claim 1, wherein the depth of the recess is less than the thickness of the flat layer.
4. The top-emitting OLED display panel of claim 1, wherein the grooves include a first groove, a second groove, and a third groove, the first groove and the second groove being disposed adjacent to the light emitting devices on both sides, respectively, and the third groove being disposed adjacent to a center of the light emitting devices.
5. The top-emitting OLED display panel of claim 4, wherein the third recess has a depth greater than the depths of the first recess and the second recess.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111321971.2A CN114122084B (en) | 2021-11-09 | 2021-11-09 | Top-emitting OLED display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321971.2A CN114122084B (en) | 2021-11-09 | 2021-11-09 | Top-emitting OLED display panel |
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| CN114122084A CN114122084A (en) | 2022-03-01 |
| CN114122084B true CN114122084B (en) | 2024-04-30 |
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