CN211428170U - Organic electroluminescent display panel - Google Patents
Organic electroluminescent display panel Download PDFInfo
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- CN211428170U CN211428170U CN201922260741.4U CN201922260741U CN211428170U CN 211428170 U CN211428170 U CN 211428170U CN 201922260741 U CN201922260741 U CN 201922260741U CN 211428170 U CN211428170 U CN 211428170U
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Abstract
The embodiment of the utility model discloses organic electroluminescent display panel, organic electroluminescent display panel includes: a substrate; the pixel circuit layer is arranged on the substrate; the planarization layer is arranged on one side of the pixel circuit layer away from the substrate; the pixel defining layer is arranged on one side, away from the pixel circuit layer, of the planarization layer and is provided with a plurality of through holes, and a slit structure is arranged between every two adjacent through holes; a plurality of pixel units; each pixel unit comprises an anode electrode, a cathode electrode and an organic functional layer, wherein the anode electrode is arranged between the planarization layer and the pixel definition layer, part of the anode electrode is exposed in the through hole and is electrically connected with the pixel circuit layer, the organic functional layer is arranged on one side, far away from the anode electrode, of the pixel definition layer, is exposed in the anode electrode of the through hole and is interrupted at the opening of the slit structure, and the cathode electrode is arranged on one side, far away from the anode electrode, of the organic functional layer. The utility model discloses display panel's side direction leakage current can be avoided.
Description
Technical Field
The utility model relates to a show technical field, especially relate to an organic electroluminescent display panel.
Background
The OLED display is an organic electroluminescent display having a plurality of light emitting cells, each of which can be used as a Pixel cell, each of the Pixel cells having an anode electrode surrounded by a Pixel Defining Layer (PDL) of an organic material to Define an OLED light emitting region, in which the organic material is stacked into an organic functional Layer of the OLED light emitting cell by an evaporation technique or an inkjet printing technique (IJP), and then a cathode electrode is formed, thereby obtaining the OLED light emitting cell, which may be a Red (Red), Green (Green), Blue (Blue), or white (white) light emitting cell.
When stacking organic materials into organic functional layers of an OLED light-emitting unit, doping materials are often added to the organic functional layers in order to stack the OLED light-emitting unit with high efficiency and high reliability. However, in the high-resolution AMOLED display, the distance between adjacent pixel units is very close, and the organic functional layer added with the doping material may cause lateral leakage current, so that the contrast of the display is reduced, and the phenomenon of image sticking is generated.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to overcome at least some technical problems of the prior art, the present invention provides an organic electroluminescent display panel.
Specifically, an embodiment of the present invention provides an organic electroluminescent display panel, including: a substrate; a pixel circuit layer disposed on the substrate; the planarization layer is arranged on one side, away from the substrate, of the pixel circuit layer; the pixel defining layer is arranged on one side, far away from the pixel circuit layer, of the planarization layer, a plurality of through holes are formed, and a slit structure is arranged on one side, far away from the planarization layer, between every two adjacent through holes; a plurality of pixel units; each pixel unit comprises an anode electrode, a cathode electrode and an organic functional layer clamped between the anode electrode and the cathode electrode, wherein the anode electrode is arranged between the planarization layer and the pixel definition layer, part of the anode electrode is exposed to the through hole, the anode electrode is further electrically connected with the pixel circuit layer, the organic functional layer is arranged on one side, away from the anode electrode, of the pixel definition layer, covers the anode electrode exposed to the through hole and is discontinuous at the opening of the slit structure, and the cathode electrode is arranged on one side, away from the anode electrode, of the organic functional layer.
In an embodiment of the present invention, the opening size of the slit structure gradually increases in a direction away from the planarization layer.
In an embodiment of the invention, the slit structure extends into the pixel defining layer but does not extend through the pixel defining layer.
In an embodiment of the present invention, the slit structure penetrates the pixel defining layer but does not extend into the planarization layer, or the slit structure penetrates the pixel defining layer and extends into the planarization layer, or the slit structure penetrates the pixel defining layer and the planarization layer.
Furthermore, an embodiment of the present invention provides an organic electroluminescent display panel, including: a substrate; a pixel circuit layer disposed on the substrate; the planarization layer is arranged on one side, away from the substrate, of the pixel circuit layer; the pixel defining layer is arranged on one side, far away from the pixel circuit layer, of the planarization layer, a plurality of through holes are formed, and a slit structure is arranged on one side, far away from the planarization layer, between every two adjacent through holes; a plurality of pixel units; each pixel unit comprises an anode electrode, a cathode electrode and an organic functional layer clamped between the anode electrode and the cathode electrode, wherein the anode electrode is arranged between the planarization layer and the pixel definition layer, part of the anode electrode is exposed to the through hole, the anode electrode is also electrically connected with the pixel circuit layer, the organic functional layer is arranged on one side, away from the anode electrode, of the pixel definition layer, covers the anode electrode exposed to the through hole and is filled in the slit structure, and the cathode electrode is arranged on one side, away from the anode electrode, of the organic functional layer.
In an embodiment of the present invention, the organic functional layer includes a hole injection layer, the hole injection layer of the plurality of pixel units is a continuous common layer, and the common layer fills each of the slit structures to extend along the slit structures.
In an embodiment of the present invention, the opening size of the slit structure gradually increases in a direction away from the planarization layer; the slit structure extends into the pixel defining layer but does not penetrate the pixel defining layer, or the slit structure penetrates the pixel defining layer.
The utility model discloses above-mentioned technical scheme can have following one or more beneficial effect: the slit structure is arranged between the two adjacent through holes on the pixel definition layer of the organic electroluminescent display panel, so that the organic functional layer is interrupted at the opening of the slit structure or is filled into the slit structure to increase the current advancing path of the organic electroluminescent display panel, the situation of lateral leakage current generated by adding a doping material into the organic functional layer can be avoided, the contrast is improved, the risk of generating picture ghost shadow is avoided, the reliability of the organic electroluminescent display panel is improved, the process margin is increased, the service life of the organic electroluminescent display panel is prolonged, and the display efficiency of the organic electroluminescent display panel is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of a part of an organic electroluminescent display panel according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another part of an organic electroluminescent display panel according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a portion of an organic electroluminescent display panel according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a portion of an organic electroluminescent display panel according to a first embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a driving control of an organic electroluminescent display panel according to a first embodiment of the present invention;
fig. 6 is a schematic view of a part of an organic electroluminescent display panel according to a second embodiment of the present invention;
fig. 7 is a schematic structural view of another part of an organic electroluminescent display panel according to a second embodiment of the present invention;
fig. 8 is a schematic structural view of a part of an organic electroluminescent display panel according to a second embodiment of the present invention;
fig. 9 is a schematic structural view of a part of an organic electroluminescent display panel according to a second embodiment of the present invention;
fig. 10 is a schematic view illustrating a driving control of an organic electroluminescent display panel according to a second embodiment of the present invention;
fig. 11 is a flowchart of a method for manufacturing an organic electroluminescent display panel according to a third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, a first embodiment of the present invention provides an organic electroluminescent display panel. As shown in fig. 1, the organic electroluminescent display panel 10 includes, for example, a substrate 11, a pixel circuit layer 12, a planarization layer 13, a pixel defining layer 14, and a plurality of pixel units 15. The drawings only illustrate two pixel units, but the present invention is not limited thereto.
Specifically, the pixel circuit layer 12 is disposed on the substrate 11. The planarization layer 13 is disposed on a side of the pixel circuit layer 12 away from the substrate 11. The pixel defining layer 14 is disposed on a side of the planarization layer 13 away from the pixel circuit layer 12, and is formed with a plurality of through holes 141, and a slit structure 142 is disposed between two adjacent through holes 141 on a side away from the planarization layer 13. Each pixel unit 15 includes an anode electrode 151, a cathode electrode 152, and an organic functional layer 153 interposed between the anode electrode 151 and the cathode electrode 152. The anode electrode 151 is disposed between the planarization layer 13 and the pixel defining layer 14, the anode electrode 151 is partially exposed to the through hole 141, and the anode electrode 151 is also electrically connected to the pixel circuit layer 12. The organic functional layer 153 is disposed on a side of the pixel defining layer 14 away from the anode electrode 151, covering the anode electrode 151 exposed to the through hole 141, and is interrupted at the opening of the slit structure 142. The cathode electrode 152 is disposed on a side of the organic functional layer 153 remote from the anode electrode 151.
Further, the opening size of the slit structure 142 gradually increases in a direction away from the planarization layer 13. The slit structure 142 is, for example, trapezoidal.
Further, as shown in fig. 1, the slit structure 142 of the organic electroluminescent display panel 10 provided in this embodiment, for example, penetrates through the pixel defining layer 14 but does not extend into the planarization layer 13. However, the present invention is not limited thereto. As shown in fig. 2, the slit structure 142 of the organic electroluminescent display panel 10 may be disposed to extend into the pixel defining layer 14, but not to penetrate the pixel defining layer 14. As shown in fig. 3, the slit structure 142 of the organic electroluminescent display panel 10 may also be disposed to penetrate the pixel defining layer 14 and to protrude into the planarization layer 13. As shown in fig. 4, the slit structure 142 of the organic electroluminescent display panel 10 may also be disposed to penetrate the pixel defining layer 14 and the planarizing layer 13.
Further, the substrate 11 is made of a transparent material or a flexible transparent material, such as a quartz substrate or a polyimide substrate. The planarization layer 13 is formed of a material having a planarization effect, such as a silicone material, an acrylic material, or a polyimide material. The planarization layer 13 may be an insulating layer. The pixel defining layer 14 is formed of a single material layer or a composite material layer of a suitable organic material among materials such as polyacrylate and polyimide.
The anode electrode 151 includes, for example, a first transparent conductive layer such as ITO, a metal layer such as Ag, and a second transparent conductive layer such as ITO, which are sequentially stacked. The cathode electrode 152 includes, for example, a magnesium-silver alloy. The organic functional layer 153 includes, for example, a multilayer of at least one of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), and an Electron Injection Layer (EIL), and further includes an emission layer EML to emit light of different colors according to the kind of organic material.
Further, as shown in fig. 5, the pixel circuit layer 12 includes, for example, a plurality of transistors (121, 123) and a storage capacitor 122 electrically connecting the plurality of transistors, and the anode electrode is electrically connected to the plurality of transistors. The transistor structure mentioned is, for example, a Top Gate structure (Top Gate). Note that the present invention does not limit the specific structure of the transistor. The foregoing description is only for the purpose of better illustrating the present embodiments.
As shown in fig. 5, the positive voltage power ELVDD is supplied to the positive power supply terminal and the ground power supply voltage ELVSS may be supplied to the ground power supply terminal, and the state of the driving transistor 121 controls the amount of current flowing through the pixel unit 15, for example, the organic electroluminescent element, and thus controls the luminance of light emitted from the organic electroluminescent display panel 10. To ensure that transistor 121 is maintained in a desired state between successive frames of data, the voltage on storage capacitor 122 is applied to the gate of transistor 121 at node a to control transistor 121. Data may be loaded into the storage capacitor 122 using one or more switching transistors, such as transistor 123. When the switching transistor 123 is turned off, the Data Line (DL) is isolated from the storage capacitor 122 and the gate voltage on node a is equal to the data value stored in the storage capacitor 122. When the gate line is also called a scan line (GL) is turned off, the switching transistor 123 is turned on and a new data signal on the data line DL is loaded into the storage capacitor 122. The new signal on the storage capacitance 122 is applied to the gate of the transistor 121 at node a, thereby adjusting the state of the transistor 121 and adjusting the corresponding amount of light emitted by the pixel cell 15.
In addition, the organic electroluminescent display panel according to an embodiment of the present invention may further include an insulating layer between the planarization layer 13 and the pixel circuit layer, where the insulating layer is, for example, a single-layer structure composed of SiOx, or a composite-layer structure composed of SiOx and SiNx.
To sum up, the embodiment of the utility model provides an organic electroluminescent display panel sets up slit structure 142 through defining between two adjacent through-holes 141 on layer 14 at the pixel for organic functional layer is interrupted at the opening part of slit structure, can avoid organic functional layer to add the condition of the side direction leakage current that the doping material produced, the contrast has been improved, avoid producing the risk of picture ghost, organic electroluminescent display panel's reliability has been promoted, the processing procedure margin has been increased, the life-span of using organic electroluminescent display panel has been prolonged, organic electroluminescent display panel's display efficiency is promoted.
[ second embodiment ]
Referring to fig. 6, a second embodiment of the present invention provides an organic electroluminescent display panel. As shown in fig. 6, the organic electroluminescence display panel 20 includes, for example, a substrate 21, a pixel circuit layer 22, a planarization layer 23, a pixel defining layer 24, and a plurality of pixel units 25. The drawings only illustrate two pixel units, but the present invention is not limited thereto.
Specifically, the pixel circuit layer 22 is disposed on the substrate 21. The planarization layer 23 is disposed on a side of the pixel circuit layer 22 away from the substrate 21. The pixel defining layer 24 is disposed on a side of the planarization layer 23 away from the pixel circuit layer 22, and is formed with a plurality of through holes 241, and a slit structure 242 is disposed between two adjacent through holes 241 on a side away from the planarization layer 23. Each pixel unit 25 includes an anode electrode 251, a cathode electrode 252, and an organic functional layer 253 sandwiched between the anode electrode 251 and the cathode electrode 252. The anode electrode 251 is disposed between the planarization layer 23 and the pixel defining layer 24, the anode electrode 251 is partially exposed to the via hole 241, and the anode electrode 251 is also electrically connected to the pixel circuit layer 22. The organic functional layer 253 is disposed on a side of the pixel defining layer 24 away from the anode electrode 251, covers the anode electrode 251 exposed to the through hole 241, and fills the slit structure 242. The cathode electrode 252 is disposed on a side of the organic functional layer 253 remote from the anode electrode 251.
Further, the opening size of the slit structure 242 gradually increases in a direction away from the planarization layer 23. The slit structures 242 are, for example, trapezoidal.
Further, as shown in fig. 6, the slit structure 242 of the organic electroluminescent display panel 20 provided in this embodiment, for example, penetrates through the pixel defining layer 24 but does not extend into the planarization layer 23. However, the present invention is not limited thereto. As shown in fig. 7, the slit structure 242 of the organic electroluminescent display panel 20 may be disposed to protrude into the pixel defining layer 24, but not to penetrate through the pixel defining layer 24. As shown in fig. 8, the slit structure 242 of the organic electroluminescent display panel 20 may also be disposed to penetrate the pixel defining layer 24 and extend into the planarization layer 23. As shown in fig. 9, the slit structure 242 of the organic electroluminescent display panel 20 may also be disposed to penetrate the pixel defining layer 24 and the planarizing layer 23.
Further, the substrate 21 is made of a transparent material or a flexible transparent material, such as a quartz substrate or a polyimide substrate. The planarization layer 23 is formed of a material having a planarization effect, such as a silicone-based material, an acrylic-based material, or a polyimide-based material. Further, the planarization layer 23 may be an insulating layer. The pixel defining layer 24 is formed of a single material layer or a composite material layer of a suitable organic material among materials such as polyacrylate and polyimide.
The anode electrode 251 includes, for example, a first transparent conductive layer such as ITO, a metal layer such as Ag, and a second transparent conductive layer such as ITO, which are sequentially stacked. The cathode electrode 252 includes, for example, a magnesium-silver alloy. The organic functional layer 253 includes, for example, a Hole Injection Layer (HIL), and the hole injection layers 253 of the plurality of pixel units 25 are a continuous common layer filled in each slit structure 242 to extend along the slit structure 242. In addition, the organic functional layer 253 may further include a multi-layer of at least one of a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), and an Electron Injection Layer (EIL), and further include an emission layer EML to emit light of different colors according to the kind of organic material. The emission layer EML is disposed only in the via 241, for example.
Further, as shown in fig. 10, the pixel circuit layer 22 includes, for example, a plurality of transistors (221, 223) and a storage capacitor 222 electrically connecting the plurality of transistors, and the anode electrode is electrically connected to the plurality of transistors. The transistor structure mentioned is, for example, a Top Gate structure (Top Gate). Note that the present invention does not limit the specific structure of the transistor. The foregoing description is only for the purpose of better illustrating the present embodiments.
As shown in fig. 10, the positive voltage power ELVDD is supplied to the positive power supply terminal and the ground power supply voltage ELVSS may be supplied to the ground power supply terminal, and the state of the driving transistor 221 controls the amount of current flowing through the pixel unit 25, for example, the organic electroluminescent element, thereby controlling the luminance of light emitted from the organic electroluminescent display panel 20. To ensure that the transistor 221 is maintained in a desired state between successive frames of data, the voltage on the storage capacitor 222 is applied to the gate of the transistor 221 at node a to control the transistor 221. Data may be loaded into storage capacitor 222 using one or more switching transistors, such as transistor 223. When the switching transistor 223 is turned off, the Data Line (DL) is isolated from the storage capacitor 222 and the gate voltage on node a is equal to the data value stored in the storage capacitor 222. When the gate line, also called a scan line (GL), is turned off, the switching transistor 223 will be turned on and a new data signal on the data line DL will be loaded into the storage capacitor 222. The new signal on the storage capacitor 222 is applied to the gate of the transistor 221 at node a, thereby adjusting the state of the transistor 221 and adjusting the corresponding amount of light emitted by the pixel cell 25.
In addition, the organic electroluminescent display panel 20 according to an embodiment of the present invention may further include an insulating layer between the planarization layer 23 and the pixel circuit layer 22, where the insulating layer is, for example, a single-layer structure composed of SiOx or a composite-layer structure composed of SiOx and SiNx.
To sum up, the embodiment of the utility model provides an organic electroluminescent display panel 20 is through setting up slit structure 242 between two adjacent through-holes 241 on pixel definition layer 24, make organic functional layer 253 fill slit structure 242, increase organic electroluminescent display panel's electric current route of marcing, can avoid the condition of the side direction leakage current that organic functional layer adds the doped material production, the contrast has been improved, avoid producing the risk of picture ghost, organic electroluminescent display panel's reliability has been promoted, the processing procedure margin has been increased, the life-span of using organic electroluminescent display panel has been prolonged, promote organic electroluminescent display panel's display efficiency.
[ third embodiment ]
Referring to fig. 11, a third embodiment of the present invention provides a method for fabricating an organic electroluminescent display panel. Specifically, the manufacturing method includes, for example, the steps of:
step S31: providing a substrate;
step S32: forming a pixel circuit layer on the substrate;
step S33: forming a planarization layer on one side of the pixel circuit layer, which is far away from the substrate;
step S34: forming an anode electrode on one side of the planarization layer away from the pixel circuit layer, and electrically connecting the anode electrode with the pixel circuit layer;
step S35: forming a pixel defining material layer on the anode electrode far away from the planarization layer;
step S36: forming through holes on the pixel defining material layer to expose part of the anode electrode, and forming a slit structure between two adjacent through holes at one side far away from the planarization layer to obtain a pixel defining layer;
step S37: forming an organic functional layer on a side of the pixel defining layer away from the anode electrode, wherein the organic functional layer covers the anode electrode exposed to the via hole;
step S38: and forming a cathode electrode on one side of the organic functional layer far away from the anode electrode.
Specifically, the substrate mentioned in step S31 is formed of a transparent material, for example. For example, the substrate is a quartz substrate. Alternatively, the substrate may be formed of a flexible transparent material. For example, the substrate is a polyimide substrate.
The pixel circuit layer mentioned in step S32 includes, for example, a plurality of transistors and capacitors connecting the transistors. Wherein the structure of the transistor is, for example, a Top Gate structure (Top Gate). The process of forming the pixel circuit layer in step S32 may refer to the conventional mature process, and is not repeated herein for brevity.
The material of the planarization layer mentioned in step S33 is, for example, a material having a planarization effect, such as a silicone-based material, an acrylic-based material, or a polyimide-based material. The process of forming the planarization layer in step S33 may refer to the conventional well-established process, and is not described herein for brevity.
The anode electrode mentioned in step S34 is a reflective electrode, which may be a composite layer structure, for example, the anode electrode is a three-layer structure formed by two transparent conductive oxide films and a metal film sandwiched therebetween. Among them, the material of the transparent conductive oxide film includes indium tin oxide ITO, and the material of the metal film includes silver Ag. Further, the anode electrode is electrically connected to, for example, a transistor of the pixel circuit layer.
The pixel defining material layer mentioned in step S35 is formed of, for example, a single material layer or a composite material layer of a suitable organic material among materials such as polyacrylate and polyimide.
The opening size of the slit structure mentioned in step S36 gradually increases in a direction away from the planarization layer. The slit structures mentioned are for example trapezoidal. The opening size of the through-hole mentioned gradually decreases in the direction of putting in the anode electrode. The slit structure of step S36 is formed by photolithography, for example, and may be formed at the limit of other conventional hole-punching processes. The slit structure extends, for example, into the pixel defining layer but not through the pixel defining layer, or through the pixel defining layer but not into the planarizing layer, or through the pixel defining layer and the planarizing layer.
The organic functional layer mentioned in step S37 includes an emission layer (EML), and a multilayer structure of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), and/or an Electron Injection Layer (EIL). When the organic functional layer includes all of the above-described layers, a hole injection layer may be disposed on the anode electrode to correspond to the anode, and a hole transport layer, an emission layer, an electron transport layer, and an electron injection layer may be sequentially stacked thereon. Each layer structure in the organic functional layer is formed on the anode electrode by, for example, an evaporation or inkjet printing process, and when the evaporation process is adopted, an Open mask (Open mask) or a precision mask may be used. The light-emitting layer is located in the through hole. The hole injection layer, the hole transport layer, the electron transport layer or the electron injection layer may be one and the same continuous common layer. The organic functional layer is, for example, interrupted at the opening of the slit structure or filled into the slit structure.
The cathode electrode mentioned in step S38 may be a transparent electrode or a translucent electrode. When the cathode electrode is a transparent electrode, the material of the cathode electrode is a transparent oxide, such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), or the like. The cathode electrode is then deposited on the organic functional layer, for example by sputtering. When the cathode electrode is a translucent electrode, the material of the cathode electrode is a metal, such as lithium (Li), calcium (Ca), aluminum (Al), silver (Ag), or magnesium-silver alloy (MgAg), etc. The cathode electrode is deposited on the organic functional layer by thermal evaporation, for example. The aforementioned anode electrode, organic functional layer, and cathode electrode form a pixel unit, such as an organic electroluminescent element.
It should be noted that, the method for manufacturing an organic electroluminescent display panel provided in this embodiment is used to manufacture the organic electroluminescent display panel provided in the first embodiment and/or the second embodiment, and for the specific description of the organic electroluminescent display panel, reference may be made to the foregoing embodiments, and for brevity, no further description is repeated here.
In summary, in the manufacturing method of the organic electroluminescent display panel provided in this embodiment, the slit structure is disposed between the two adjacent through holes on the pixel defining layer of the organic electroluminescent display panel, so that the organic functional layer is interrupted or filled into the slit structure at the opening of the slit structure to increase the current traveling path of the organic electroluminescent display panel, thereby avoiding the situation of lateral leakage current caused by adding a doping material to the organic functional layer, improving the contrast, avoiding the risk of generating image sticking, improving the reliability of the organic electroluminescent display panel, increasing the margin of the manufacturing process, prolonging the service life of the organic electroluminescent display panel, and improving the display efficiency of the organic electroluminescent display panel.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. An organic electroluminescent display panel, comprising:
a substrate;
a pixel circuit layer disposed on the substrate;
the planarization layer is arranged on one side, away from the substrate, of the pixel circuit layer;
the pixel defining layer is arranged on one side, far away from the pixel circuit layer, of the planarization layer, a plurality of through holes are formed, and a slit structure is arranged on one side, far away from the planarization layer, between every two adjacent through holes;
a plurality of pixel units;
each pixel unit comprises an anode electrode, a cathode electrode and an organic functional layer clamped between the anode electrode and the cathode electrode, wherein the anode electrode is arranged between the planarization layer and the pixel definition layer, part of the anode electrode is exposed to the through hole, the anode electrode is further electrically connected with the pixel circuit layer, the organic functional layer is arranged on one side, away from the anode electrode, of the pixel definition layer, covers the anode electrode exposed to the through hole and is discontinuous at the opening of the slit structure, and the cathode electrode is arranged on one side, away from the anode electrode, of the organic functional layer.
2. The organic electroluminescent display panel according to claim 1, wherein the opening size of the slit structure gradually increases in a direction away from the planarization layer.
3. The organic electroluminescent display panel according to claim 1 or 2, wherein the slit structure extends into the pixel defining layer but does not penetrate the pixel defining layer.
4. The organic electroluminescent display panel according to claim 1 or 2, wherein the slit structure penetrates through the pixel defining layer but does not protrude into the planarizing layer, or the slit structure penetrates through the pixel defining layer and protrudes into the planarizing layer, or the slit structure penetrates through the pixel defining layer and the planarizing layer.
5. An organic electroluminescent display panel, comprising:
a substrate;
a pixel circuit layer disposed on the substrate;
the planarization layer is arranged on one side, away from the substrate, of the pixel circuit layer;
the pixel defining layer is arranged on one side, far away from the pixel circuit layer, of the planarization layer, a plurality of through holes are formed, and a slit structure is arranged on one side, far away from the planarization layer, between every two adjacent through holes;
a plurality of pixel units;
each pixel unit comprises an anode electrode, a cathode electrode and an organic functional layer clamped between the anode electrode and the cathode electrode, wherein the anode electrode is arranged between the planarization layer and the pixel definition layer, part of the anode electrode is exposed to the through hole, the anode electrode is also electrically connected with the pixel circuit layer, the organic functional layer is arranged on one side, away from the anode electrode, of the pixel definition layer, covers the anode electrode exposed to the through hole and is filled in the slit structure, and the cathode electrode is arranged on one side, away from the anode electrode, of the organic functional layer.
6. The panel according to claim 5, wherein the organic functional layer comprises a hole injection layer, the hole injection layers of the pixel units are a continuous common layer, and the common layer fills each slit structure to extend along the slit structure.
7. The organic electroluminescent display panel according to claim 5, wherein the opening size of the slit structure gradually increases in a direction away from the planarization layer;
the slit structure extends into the pixel defining layer but does not penetrate the pixel defining layer, or the slit structure penetrates the pixel defining layer.
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| WO2024113177A1 (en) * | 2022-11-29 | 2024-06-06 | Boe Technology Group Co., Ltd. | Display substrate, display apparatus, and method of fabricating display substrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113177A1 (en) * | 2022-11-29 | 2024-06-06 | Boe Technology Group Co., Ltd. | Display substrate, display apparatus, and method of fabricating display substrate |
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