CN111403625B - OLED display panel - Google Patents

OLED display panel Download PDF

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Publication number
CN111403625B
CN111403625B CN202010223358.6A CN202010223358A CN111403625B CN 111403625 B CN111403625 B CN 111403625B CN 202010223358 A CN202010223358 A CN 202010223358A CN 111403625 B CN111403625 B CN 111403625B
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China
Prior art keywords
layer
retaining wall
display panel
oled display
inorganic
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CN202010223358.6A
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CN111403625A (en
Inventor
汪东
唐凡
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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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
    • H10K50/844—Encapsulations
    • 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
    • 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

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The OLED display panel provided by the embodiment of the invention comprises a pixel defining layer, a light-emitting functional layer and an evaporation common layer, wherein the light-emitting functional layer comprises a light-emitting layer and a second electrode layer positioned on the light-emitting layer; in the non-luminous region, at least one retaining wall and a through hole are arranged between the pixel defining layer and the evaporation coating common layer, the retaining wall is made of inorganic materials, and the through hole penetrates through the retaining wall and the first inorganic layer to increase the combination effect.

Description

OLED display panel
Technical Field
The invention relates to the technical field of OLED display, in particular to an OLED display panel.
Background
The phenomenon that the adhesion of an evaporation common layer and an encapsulation film layer is poor exists in the existing OLED display panel film encapsulation technology, the evaporation common layer is arranged on a second electrode layer, the encapsulation film layer is in contact with the evaporation common layer and is a first inorganic layer, the adhesion of inorganic materials of the first inorganic layer and organic materials of the evaporation common layer is poor, and therefore the encapsulation film layer peeling technical problem exists in the existing OLED display panel film encapsulation technology.
Disclosure of Invention
The embodiment of the invention provides an OLED display panel, which can solve the technical problem that an encapsulation film layer is peeled off in the existing OLED display panel film encapsulation technology.
An embodiment of the present invention provides an OLED display panel, including:
a substrate;
an array layer disposed over the substrate;
a pixel defining layer disposed over the array layer;
the light-emitting functional layer is partially arranged above the pixel defining layer and sequentially comprises a first electrode layer, a light-emitting layer and a second electrode layer from bottom to top;
an evaporation common layer disposed on the second electrode layer;
the packaging layer sequentially comprises a first inorganic layer, a first organic layer and a second inorganic layer from bottom to top, and the first inorganic layer is arranged on the evaporation common layer;
the pixel definition layer and the packaging layer are provided with at least one retaining wall, the preparation material of the retaining wall comprises an inorganic material, and the retaining wall is in contact with the first inorganic layer.
In the OLED display panel provided in the embodiment of the present invention, the blocking wall is disposed on the pixel defining layer between the adjacent light emitting areas, and the blocking wall is in contact with the first inorganic layer through a through hole penetrating through the evaporation common layer.
In the OLED display panel provided in the embodiment of the present invention, in any pixel unit, a ratio of the number of the retaining walls to the number of the pixels is 1: 1.
In the OLED display panel provided in the embodiment of the present invention, at least one protrusion or groove is disposed on a surface of the retaining wall.
In the OLED display panel provided in the embodiment of the present invention, a material for preparing the retaining wall is the same as a material for preparing the first inorganic layer.
In the OLED display panel provided in the embodiment of the present invention, the height of the retaining wall is greater than the thickness of the second electrode layer.
In the OLED display panel provided in the embodiment of the present invention, the cross-sectional shape of the retaining wall is at least one of a triangle, a rectangle, and an arc.
In the OLED display panel provided in the embodiments of the present invention, the retaining wall includes a first retaining wall and a second retaining wall, and the first retaining wall and the second retaining wall have different shapes.
In the OLED display panel provided in the embodiments of the present invention, the retaining wall includes a first retaining wall and a second retaining wall, and a height of the first retaining wall is greater than a height of the second retaining wall.
In the OLED display panel provided in the embodiment of the present invention, the blocking wall is disposed on the second electrode layer between the adjacent light emitting regions, and the OLED display panel further includes a through hole penetrating through the evaporation common layer.
Has the advantages that: the OLED display panel provided by the embodiment of the invention comprises a substrate, an array layer, a pixel defining layer, a light-emitting function layer, an evaporation common layer and an encapsulation layer, the array layer disposed over the substrate, the pixel defining layer disposed over the array layer, the light-emitting functional layer is partially arranged above the pixel defining layer and sequentially comprises a first electrode layer, a light-emitting layer and a second electrode layer from bottom to top, the evaporation common layer is arranged on the second electrode layer, the packaging layer sequentially comprises a first inorganic layer, a first organic layer and a second inorganic layer from bottom to top, the first inorganic layer is arranged on the evaporation common layer, at least one retaining wall is arranged between the pixel defining layer and the packaging layer, the preparation material of the retaining wall comprises an inorganic material, and the retaining wall is in contact with the first inorganic layer; through the through-hole, first inorganic layer with the barricade contact sets up, the barricade is inorganic material, and the cohesion between inorganic material is stronger, can alleviate the technical problem that current OLED display panel film packaging technique has the encapsulation rete and peels off.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Fig. 1 is a schematic cross-sectional view of an OLED display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an OLED display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an OLED display panel according to an embodiment of the present invention;
fig. 4 is a schematic top view of an OLED display panel provided in an embodiment of the present invention in a display motherboard;
fig. 5 is a schematic cross-sectional view of a fourth OLED display panel according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
As shown in fig. 1, an OLED display panel 1 provided in an embodiment of the present invention includes a substrate 10, an array layer 20, a pixel defining layer 30, a light emitting function layer 40, an evaporation common layer 50, and an encapsulation layer 60, where the array layer 20 is disposed above the substrate 10, the pixel defining layer 30 is disposed above the array layer 20, the light emitting function layer 40 is partially disposed above the pixel defining layer 30, the light emitting function layer 40 sequentially includes, from bottom to top, a first electrode layer 401, a light emitting layer 402, and a second electrode layer 403, the evaporation common layer 50 is disposed on the second electrode layer 403, the encapsulation layer 60 sequentially includes, from bottom to top, a first inorganic layer 601, a first organic layer 602, and a second inorganic layer 603, the first inorganic layer 601 is disposed on the evaporation common layer 50, and at least one retaining wall 70 is disposed between the pixel defining layer 30 and the encapsulation layer 60, the preparation material of the retaining wall 70 includes an inorganic material, and the retaining wall 70 is in contact with the first inorganic layer 601.
In this embodiment, the OLED display panel 1 includes a substrate 10, an array layer 20, a pixel defining layer 30, a light emitting function layer 40, an evaporation common layer 50, and an encapsulation layer 60, wherein the array layer 20 is disposed above the substrate 10, the pixel defining layer 30 is disposed above the array layer 20, a part of the light emitting function layer 40 is disposed above the pixel defining layer 30, the light emitting function layer 40 sequentially includes a first electrode layer 401, a light emitting layer 402, and a second electrode layer 403 from bottom to top, the evaporation common layer 50 is disposed on the second electrode layer 403, the encapsulation layer 60 sequentially includes a first inorganic layer 601, a first organic layer 602, and a second inorganic layer 603 from bottom to top, the first inorganic layer 601 is disposed on the evaporation common layer 50, wherein at least one retaining wall 70 is disposed between the pixel defining layer 30 and the encapsulation layer 60, and a preparation material of the retaining wall 70 includes an inorganic material, the retaining wall 70 is in contact with the first inorganic layer 601; through the through-hole, first inorganic layer 601 with the barricade 70 contact sets up, barricade 70 is inorganic material, and the cohesion between inorganic material is stronger, can alleviate the technical problem that current OLED display panel film encapsulation technique has the encapsulation rete and peels off.
The evaporation common layer 50 includes two organic film layers for protecting the light emitting layer 402 from the encapsulation process and enhancing the light extraction rate, and the evaporation film layers are all in the nanometer level, so that the light emitting layer 402 is easily damaged when the encapsulation film layers are not in contact with the light emitting layer 402.
The through holes are used for connecting the first inorganic layer 601 with the retaining walls 70, so that the bonding force between the packaging film and other films below the packaging film is enhanced.
After the retaining wall 70 is formed, before the evaporation coating packaging layer 60, the retaining wall 70 is subjected to laser treatment by using a mask plate, the evaporation coating common layer 50 on the retaining wall 70 is peeled off, the through hole is formed, and then the first inorganic layer 601 is deposited, and the first inorganic layer 601 is connected with the retaining wall 70 through the through hole.
The array layer 20 includes a light-shielding layer, a buffer layer, an active layer, an insulating layer, a gate layer, a source/drain layer, and a planarization layer disposed on the source/drain layer.
In one embodiment, the retaining wall 70 is provided with a through hole, and the through hole penetrates through the retaining wall 70 and the first inorganic layer 601.
In one embodiment, the retaining wall 70 is disposed on the pixel defining layer 30 between adjacent light emitting regions, and the retaining wall 70 is in contact with the first inorganic layer 601 through a via hole penetrating through the evaporation common layer 50.
In one embodiment, the ratio of the number of the retaining walls 70 to the number of the pixels in any pixel unit is 1: 1.
In this embodiment, the uniformity and stability of the barriers 70 of the OLED display panel 1 can be improved by arranging the same number of barriers 70 in any pixel unit in proportion to the pixels.
In one embodiment, the surface of the retaining wall 70 is provided with at least one protrusion or recess.
As shown in fig. 2, the surface of any one of the retaining walls 70 may be provided with at least one protrusion.
In this regard, as shown in fig. 3, the surface of any one of the retaining walls 70 may be provided with only at least one groove.
Wherein, the surface of any one of the retaining walls 70 may be further provided with at least one groove and at least one protrusion.
In this embodiment, the surface of the retaining wall 70 is provided with grooves/protrusions, so that the contact area between the retaining wall 70 and the first inorganic layer 601 is increased, and the bonding force between the films is enhanced.
In one embodiment, the retaining wall 70 has at least one protrusion or recess on its upper surface, which is in contact with the bottom surface of the first inorganic layer 601.
In one embodiment, the retaining wall 70 is made of the same material as the first inorganic layer 601.
In one embodiment, the retaining wall 70 is made of the same material as the pixel defining layer 30.
Wherein, the preparation material of the pixel defining layer 30 can be hydrophobic material
In this embodiment, the preparation process of the retaining wall 70 can be performed simultaneously with the preparation process of the pixel defining layer 30, and a separate process is not required, thereby saving cost.
In this embodiment, the manufacturing process of the retaining wall 70 can be performed simultaneously with the manufacturing process of the pixel defining layer 30, and a separate process is not required.
In one embodiment, the height of the retaining wall 70 is related to the thickness of the second electrode layer 403.
Wherein, the height of the retaining wall 70 is equal to the thickness of the second electrode layer 403.
Wherein the height of the retaining wall 70 is less than the thickness of the second electrode layer 403.
In one embodiment, the height of the retaining wall 70 is greater than the thickness of the second electrode layer 403.
In one embodiment, the cross-sectional shape of the retaining wall 70 is at least one of a triangle, a rectangle, and an arc.
In one embodiment, the retaining wall 70 includes a first retaining wall 701 and a second retaining wall 702, and the shape of the first retaining wall 701 is different from that of the second retaining wall 702.
In one embodiment, the retaining wall 70 includes a first retaining wall 701 and a second retaining wall 702, and the height of the first retaining wall 701 is greater than the height of the second retaining wall 702.
In one embodiment, the retaining wall 70 includes a first retaining wall 701 and a second retaining wall 702, and the height of the first retaining wall 701 is smaller than the height of the second retaining wall 702.
In one embodiment, the retaining wall 70 includes a first retaining wall 701 and a second retaining wall 702, and the height of the first retaining wall 701 is equal to the height of the second retaining wall 702.
In one embodiment, the retaining walls 70 are disposed on the second electrode layer 403 between adjacent light emitting areas, and the OLED display panel 1 further includes through holes penetrating through the evaporation common layer 50.
In one embodiment, the retaining walls 70 are arranged in an array on the pixel defining layer 30.
The retaining walls 70 may be arranged in an array in one pixel unit.
In the adjacent pixel units, the retaining walls 70 may be respectively located in different pixel units and arranged in an array.
In one embodiment, the first electrode layer 401 is an anode layer and the second electrode layer 403 is a cathode layer.
Wherein, the preparation material of the cathode layer comprises magnesium metal or silver metal.
The preparation material of the cathode layer comprises indium tin oxide, silver, an indium tin oxide material or other anode materials.
In one embodiment, after the second electrode layer 403 and the common layer 50 are evaporated, the organic film layer above the retaining wall 70 is removed by a mask plate, and the opening region of the mask plate is disposed between the adjacent light-emitting regions of the corresponding display panel.
The number of the openings is in direct proportion to the number of the pixels.
In an embodiment, as shown in fig. 4, the ratio of the number of the openings of the mask to the number of the pixels is 1: 1.
Wherein the retaining wall 70 may be disposed between three sub-pixels of the pixel.
In one embodiment, the pixel includes three sub-pixels, and the first sub-pixel is a red sub-pixel, the second sub-pixel is a blue sub-pixel, and the third sub-pixel is a green sub-pixel.
In one embodiment, as shown in fig. 4, the red sub-pixel, the blue sub-pixel and the green sub-pixel are located at three vertices of a regular triangle, and the retaining wall 70 is located at the center of the regular triangle.
In one embodiment, the ratio of the number of the openings of the mask to the number of the pixels is 3: 1.
Wherein the retaining wall 70 is disposed corresponding to the opening.
In one embodiment, as shown in fig. 5, the retaining wall 70 includes a first retaining wall 701 and a second retaining wall 702, and the first retaining wall 701 and the second retaining wall 702 are located in any pixel unit.
The height of the first retaining wall 701 may be greater than the height of the second retaining wall 702.
The height of the first retaining wall 701 may also be equal to the height of the second retaining wall 702.
The width of the first retaining wall 701 may be greater than the width of the second retaining wall 702.
The width of the first retaining wall 701 may be equal to the width of the second retaining wall 702.
The first retaining wall 701 and the second retaining wall 702 may have the same surface area but different volumes.
In one embodiment, the first retaining wall 701 and the second retaining wall 702 are respectively located at different pixel units, and in the display panel, the first retaining wall 701 and the second retaining wall 702 are arranged periodically.
In one embodiment, in any one pixel unit, the pixel unit includes the at least one first wall 701 and the at least one second wall 702, and the first walls 701 and the second walls 702 are arranged periodically.
In one embodiment, in any one pixel unit, the pixel unit includes the at least one first wall 701 and the at least one second wall 702, and the first wall 701 and the second wall 702 are symmetrically disposed about the light emitting region.
The retaining wall 70 may be disposed on the pixel defining layer 30.
The retaining wall 70 may be disposed on the evaporation common layer 50.
The OLED display panel provided by the embodiment of the invention comprises a substrate, an array layer, a pixel defining layer, a light-emitting function layer, an evaporation common layer and an encapsulation layer, the array layer disposed over the substrate, the pixel defining layer disposed over the array layer, the light-emitting functional layer is partially arranged above the pixel defining layer and sequentially comprises a first electrode layer, a light-emitting layer and a second electrode layer from bottom to top, the evaporation common layer is arranged on the second electrode layer, the packaging layer sequentially comprises a first inorganic layer, a first organic layer and a second inorganic layer from bottom to top, the first inorganic layer is arranged on the evaporation common layer, at least one retaining wall is arranged between the pixel defining layer and the packaging layer, the preparation material of the retaining wall comprises an inorganic material, and the retaining wall is in contact with the first inorganic layer; through the through-hole, first inorganic layer with the barricade contact sets up, the barricade is inorganic material, and the cohesion between inorganic material is stronger, can alleviate the technical problem that current OLED display panel film packaging technique has the encapsulation rete and peels off.
The foregoing detailed description is provided for one of the embodiments of the present invention, and the principle and the implementation of the present invention are explained herein by applying specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. An OLED display panel, comprising:
a substrate;
an array layer disposed over the substrate;
a pixel defining layer disposed over the array layer;
the light-emitting functional layer is partially arranged above the pixel defining layer and sequentially comprises a first electrode layer, a light-emitting layer and a second electrode layer from bottom to top;
the evaporation common layer is arranged on the second electrode layer and comprises two organic film layers which are respectively used for protecting the light-emitting layer from being influenced by the packaging process and enhancing the light extraction rate;
the packaging layer sequentially comprises a first inorganic layer, a first organic layer and a second inorganic layer from bottom to top, and the first inorganic layer is arranged on the evaporation common layer;
the pixel definition layer and the packaging layer are provided with at least one retaining wall, the preparation material of the retaining wall comprises an inorganic material, the retaining wall is arranged between the adjacent light emitting areas on the pixel definition layer, and the retaining wall is in contact with the first inorganic layer through a through hole penetrating through the evaporation coating common layer.
2. The OLED display panel as claimed in claim 1, wherein the ratio of the number of the banks to the number of the pixels in any one pixel unit is 1: 1.
3. The OLED display panel of claim 1, wherein the surface of the dam is provided with at least one protrusion or recess.
4. The OLED display panel according to claim 1, wherein the bank is formed of the same material as that of the first inorganic layer.
5. The OLED display panel of claim 1, wherein the height of the dam is greater than the thickness of the second electrode layer.
6. The OLED display panel of claim 1, wherein the cross-sectional shape of the dam is at least one of a triangle, a rectangle, and an arc.
7. The OLED display panel of claim 1, wherein the retaining walls comprise a first retaining wall and a second retaining wall, and the first retaining wall and the second retaining wall have different shapes.
8. The OLED display panel of claim 7, wherein the retaining walls comprise a first retaining wall and a second retaining wall, and the height of the first retaining wall is greater than the height of the second retaining wall.
CN202010223358.6A 2020-03-26 2020-03-26 OLED display panel Active CN111403625B (en)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2006286220A (en) * 2005-03-31 2006-10-19 Nippon Zeon Co Ltd Organic electroluminescent element
CN109860411A (en) * 2017-11-30 2019-06-07 京东方科技集团股份有限公司 A kind of OLED display panel and preparation method thereof, OLED display
CN110364560A (en) * 2019-07-22 2019-10-22 武汉华星光电半导体显示技术有限公司 OLED display panel
CN110391349A (en) * 2019-07-25 2019-10-29 武汉华星光电半导体显示技术有限公司 A kind of organic LED display panel and preparation method thereof
CN110854287A (en) * 2019-10-23 2020-02-28 武汉华星光电半导体显示技术有限公司 OLED display panel, preparation method thereof and display device

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Publication number Priority date Publication date Assignee Title
JP4004709B2 (en) * 2000-03-30 2007-11-07 パイオニア株式会社 Organic electroluminescence display panel and manufacturing method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006286220A (en) * 2005-03-31 2006-10-19 Nippon Zeon Co Ltd Organic electroluminescent element
CN109860411A (en) * 2017-11-30 2019-06-07 京东方科技集团股份有限公司 A kind of OLED display panel and preparation method thereof, OLED display
CN110364560A (en) * 2019-07-22 2019-10-22 武汉华星光电半导体显示技术有限公司 OLED display panel
CN110391349A (en) * 2019-07-25 2019-10-29 武汉华星光电半导体显示技术有限公司 A kind of organic LED display panel and preparation method thereof
CN110854287A (en) * 2019-10-23 2020-02-28 武汉华星光电半导体显示技术有限公司 OLED display panel, preparation method thereof and display device

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