CN111048575A - Organic light emitting display panel and method of manufacturing the same - Google Patents
Organic light emitting display panel and method of manufacturing the same Download PDFInfo
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- CN111048575A CN111048575A CN202010004905.1A CN202010004905A CN111048575A CN 111048575 A CN111048575 A CN 111048575A CN 202010004905 A CN202010004905 A CN 202010004905A CN 111048575 A CN111048575 A CN 111048575A
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- 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
- H10K59/40—OLEDs integrated with touch screens
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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
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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
- H10K59/1201—Manufacture or treatment
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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
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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Abstract
The application provides an organic light-emitting display panel and a preparation method thereof, wherein the organic light-emitting display panel comprises a display substrate, a touch control structure layer and a polaroid; the polaroid is integrated on the display substrate or the touch control structure layer; the polaroid includes the barricade and the first alignment layer, 1/4 lambda phase difference layer, second alignment layer, polarisation layer and the first protective layer that set gradually. The organic light-emitting display panel integrates the polaroid on the display substrate or the touch control structure layer by adopting an ink-jet printing process, so that the thickness of the polaroid is thinned, and the bending reliability of the organic light-emitting display panel is further improved.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to a display panel.
Background
In the dynamically bent organic light emitting diode display panel, the reliability of bending is important. At present, for the externally-hung organic light emitting diode display panel, the thickness of the polarizer and the adhesion layer is 300 microns, and the thickness ratio of the display panel is close to 1/4. The thickness of the polarizer and the adhesive layer is relatively thick, so that the bending reliability of the organic light emitting diode display panel is poor.
Disclosure of Invention
The embodiment of the application provides an organic light-emitting display panel and a preparation method thereof, which aim to solve the technical problem that the bending reliability of the panel is poor due to the fact that the conventional organic light-emitting display panel cannot thin the thickness of a polarizer and the thickness of an adhesion layer.
An embodiment of the present application provides an organic light emitting display panel, which includes:
the display substrate is used for displaying pictures and comprises a display area and a non-display area positioned on the outer periphery side of the display area;
the touch control structure layer is arranged on the display substrate; and
the polaroid is integrated on the display substrate or the touch control structural layer;
the polarizer includes:
the retaining wall is correspondingly arranged in the non-display area and surrounds the periphery of the display area, and the retaining wall is formed on the display substrate or the touch control structure layer;
a first alignment layer formed between the retaining walls and covering the display region;
1/4 a λ phase difference layer, the 1/4 λ phase difference layer being formed on the first alignment layer and covering the display area;
a second alignment layer formed on the 1/4 lambda phase difference layer and covering the display area;
a polarizing layer formed on the second alignment layer and covering the display region; and
a first protective layer formed on the polarizing layer and covering the display area and the non-display area.
In the organic light emitting display panel, the retaining wall includes a first retaining wall and a second retaining wall, the first retaining wall is correspondingly surrounded and established the periphery side of the display area, the second retaining wall is surrounded and established the periphery side of the first retaining wall, the first retaining wall with a channel is formed between the second retaining wall.
In the organic light emitting display panel of the present application, the thickness of the second retaining wall is smaller than the thickness of the first retaining wall.
In the organic light emitting display panel of the present application, the display substrate includes a substrate, a barrier layer, a buffer layer, an active layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer, an interlayer dielectric layer, a source drain metal layer, a planarization layer, an anode, a pixel defining layer, an organic light emitting layer, a cathode, and a packaging layer, which are sequentially disposed;
the touch control structure layer comprises a third insulating layer, a first touch control electrode layer, a fourth insulating layer, a second touch control electrode layer and a second protective layer which are sequentially arranged.
The embodiment of the application also relates to a preparation method of the organic light-emitting display panel, which comprises the following steps:
providing a display substrate, wherein the display substrate comprises a display area and a non-display area positioned on the outer periphery side of the display area;
forming a touch control structure layer on the display substrate;
forming a polarizer on the display substrate;
wherein, the formation of the polarizer on the display substrate comprises the following steps:
forming a retaining wall on the display substrate, wherein the retaining wall is correspondingly arranged in the non-display area and surrounds the periphery of the display area;
forming a first orientation layer between the retaining walls by adopting an ink-jet printing process, wherein the first orientation layer covers the display area;
forming an 1/4 lambda phase difference layer on the first alignment layer using an inkjet printing process, the 1/4 lambda phase difference layer covering the display region;
forming a second alignment layer on the 1/4 lambda phase difference layer using an inkjet printing process, the second alignment layer covering the display region;
forming a polarizing layer on the second alignment layer by using an inkjet printing process, the polarizing layer covering the display area;
forming a first protective layer on the polarizing layer, the first protective layer covering the display area and the non-display area.
In the method for manufacturing an organic light emitting display panel, the forming a touch structure layer on the display substrate includes:
and sequentially forming a third insulating layer, a first touch electrode layer, a fourth insulating layer, a second touch electrode layer and a second protective layer on the polarizer.
In the method for manufacturing an organic light emitting display panel, the forming a touch structure layer on the display substrate includes:
sequentially forming a third insulating layer, a first touch electrode layer, a fourth insulating layer and a second touch electrode layer on the display substrate;
and forming a patterned film layer on the second touch electrode layer by adopting a photoetching process, wherein the patterned film layer comprises a second protective layer covering the second touch electrode layer and the retaining wall formed on the second protective layer.
In the method for manufacturing the organic light-emitting display panel, the retaining wall comprises a first retaining wall and a second retaining wall, the first retaining wall is correspondingly arranged on the outer peripheral side of the display area in a surrounding mode, the second retaining wall is arranged on the outer peripheral side of the first retaining wall in a surrounding mode, and a channel is formed between the first retaining wall and the second retaining wall.
In the method for manufacturing an organic light emitting display panel, the forming of the first alignment layer between the retaining walls by using an inkjet printing process includes the steps of:
dissolving at least two kinds of orientation polymers in a solvent to form an orientation solution;
printing the orientation solution on a display area corresponding to the display substrate by adopting an ink-jet printer to form a first orientation layer in an initial state;
fixing the initial first orientation layer by adopting ultraviolet light to form the first orientation layer;
and rubbing the first alignment layer to enable the first alignment layer to have an alignment control force.
In the method for manufacturing an organic light emitting display panel, the forming of the 1/4 λ phase difference layer on the first alignment layer by using an inkjet printing process includes the steps of:
providing a first combined liquid, wherein the first combined liquid comprises a polymerizable liquid crystal compound;
printing the first combined liquid on the first alignment layer by adopting an ink-jet printer to form a first liquid crystal film;
and curing the first liquid crystal film by using ultraviolet light to form the 1/4 lambda phase difference layer.
In the method for manufacturing an organic light emitting display panel, the forming a polarizing layer on the second alignment layer by using an inkjet printing process includes:
providing a second combined liquid, wherein the second combined liquid is the polymerizable liquid crystal compound and the dichroic pigment;
printing the second combined liquid on the second alignment layer by adopting an ink-jet printer to form a second liquid crystal film;
and curing the second liquid crystal film by adopting ultraviolet light to form the polarizing layer.
The organic light-emitting display panel integrates the polaroid on the display substrate or the touch control structure layer by adopting an ink-jet printing process, so that the thickness of the polaroid is thinned, and the bending reliability of the organic light-emitting display panel is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an organic light emitting display panel according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of an organic light emitting display panel according to a second embodiment of the present application;
fig. 3 is a flowchart of a method for manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 4 is another flowchart of a method for manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 5 is a flowchart of step S3 of a method for manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 6 is a flowchart illustrating a structure of step S3 of a method for manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 7 is a flowchart of step S2 of a method of manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 8 is a flowchart of step S32 of a method of manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 9 is a flowchart of step S33 of a method of manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 10 is a flowchart of step S35 of a method of manufacturing an organic light emitting display panel according to a first embodiment of the present application;
fig. 11 is a flowchart of a method of manufacturing an organic light emitting display panel according to a second embodiment of the present application;
fig. 12 is another flowchart of a method for manufacturing an organic light emitting display panel according to a second embodiment of the present application;
fig. 13 is a flowchart of step S30 of a method of manufacturing an organic light emitting display panel according to a second embodiment of the present application;
fig. 14 is a flowchart illustrating a step S30 of a method for manufacturing an organic light emitting display panel according to a second embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an organic light emitting display panel according to a first embodiment of the present application. The embodiment of the present application provides an organic light emitting display panel 100, which includes a display substrate 11, a touch control structure layer 12, a polarizer 13, an optical adhesive layer 14, and a cover plate 15.
The display substrate 11 is used for displaying a screen. The display substrate 11 includes a display area 11a and a non-display area 11b located at an outer peripheral side of the display area 11 a. The touch structure layer 12 is disposed on the display substrate 11. The polarizer 13 is integrated on the display substrate 11 or the touch structure layer 12, and in the organic light emitting display panel 100 of the first embodiment, the polarizer 13 is integrated on the touch structure layer 12. The optical adhesive layer 14 and the cover plate are sequentially disposed on the polarizer 13.
Further, polarizer 13 includes retaining wall 131, first alignment layer 132, 1/4 λ retardation layer 133, second alignment layer 134, polarizing layer 135, and first protective layer 136.
The retaining wall 131 is correspondingly disposed in the non-display region 11b and surrounds the outer periphery of the display region 11 a. The retaining wall 131 is formed on the touch structure layer 12. Retaining wall 131 serves to prevent portions of the layers of polarizer 12 from overflowing.
The first alignment layer 132 is formed between the blocking walls 131 and covers the display region 11 a. 1/4 lambda phase difference layer 133 is formed on the first alignment layer 132 and covers the display area 11 a. The second alignment layer 134 is formed on the 1/4 lambda phase difference layer 133 and covers the display region 11 a. The polarizing layer 135 is formed on the second alignment layer 134 and covers the display area 11 a. The first protective layer 136 is formed on the polarizing layer 135 and covers the display area 11a and the non-display area 11 b.
Specifically, the first alignment layer 132, 1/4 λ phase difference layer 133, the second alignment layer 134, the polarizing layer 135, and the first protective layer 136 of the polarizer 13 may be formed by an inkjet printing process. The manufacturing of the solute liquid crystal compound type polarizer is realized by adopting an ink-jet printing process, and the total thickness of the superposition of all film layers of the polarizer is less than 15 micrometers.
The organic light emitting display panel 100 of the first embodiment integrates the polarizer on the display substrate 11 or the touch control structure layer 12 by using an inkjet printing process, so that the thickness of the polarizer is reduced, and the bending reliability of the organic light emitting display panel 100 is further improved.
In the organic light emitting display panel 100 of the first embodiment, the retaining wall 131 includes a first retaining wall 1311 and a second retaining wall 1312. The first retaining wall 1311 is correspondingly provided around the outer periphery of the display region 11 a. The second wall 1312 surrounds the outer periphery of the first wall 1311. A channel is formed between the first wall 1311 and the second wall 1312. Wherein the second blocking wall 1312 functions to prevent the material of the polarizer 13 from overflowing. When the material of the polarizer 13 overflows the first retaining wall 1311, it flows into the channel, preventing further overflow of the material.
In the organic light emitting display panel 100 of the first embodiment, the thickness of the second blocking wall 1312 is smaller than that of the first blocking wall 1311. Such an arrangement facilitates subsequent planar flow of the first protective layer 136 to quickly form the planar first protective layer 136.
In the organic light emitting display panel 100 of the first embodiment, the display substrate 11 includes a substrate 111, a barrier layer 112, a buffer layer 113, an active layer 114, a first insulating layer 115, a first gate metal layer 116, a second insulating layer 117, a second gate metal layer 118, an interlayer dielectric layer 119, a source/drain metal layer 1110, a planarization layer 1111, an anode 1112, a pixel defining layer 1113, an organic light emitting layer 1114, a cathode 1115, and an encapsulation layer 1116, which are sequentially disposed.
The touch structure layer 12 includes a third insulating layer 121, a first touch electrode layer 122, a fourth insulating layer 123, a second touch electrode layer 124 and a second passivation layer 125 sequentially disposed. The third insulating layer 121 and the fourth insulating layer 123 are inorganic insulating layers, and the third insulating layer and the fourth insulating layer may be made of silicon nitride compound (SiNx)/silicon oxide compound (SiOx). The first touch electrode layer 122 and the second touch electrode layer 124 may be made of TiAlTi, Mo, or other low-resistance metal. The second passivation layer 125 is made of an organic transparent photoresist.
Specifically, the third insulating layer 121 is formed on the encapsulation layer 1117. The polarizer 13 is formed on the second protective layer 125. The retaining wall 131 of the polarizer 13 and the second protection layer 125 are integrally formed by a photolithography process. That is, the retaining wall 131 is formed at the same time as the second passivation layer 125, so that a step of forming the retaining wall 131 by using a mask plate is omitted. The touch structure layer 12 also forms a film structure in an integrated manner, so as to further thin the thickness of the organic light emitting display panel 100.
Optionally, the display substrate 11 may have a structure of a single-layer gate metal layer and a single-layer source-drain metal layer, or a structure of a double-gate metal layer and a double-source-drain metal layer. The structure of the display substrate 11 is conventional and will not be described herein.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an organic light emitting display panel according to a second embodiment of the present application. The organic light emitting display panel 200 of the second embodiment includes a display substrate 21, a touch control structure layer 22 and a polarizer 23.
The organic light emitting display panel 200 of the second embodiment is different from the organic light emitting display panel 100 of the first embodiment in that: the polarizer 23 is integrated on the display substrate 21. The touch control structure layer 22 is formed on the polarizer 23.
The structure of the organic light emitting display panel 200 of the second embodiment is similar to or the same as the structure of the organic light emitting display panel 100 of the first embodiment, and please refer to the content of the organic light emitting display panel 100 of the first embodiment for other specific structures of the organic light emitting display panel 200 of the second embodiment.
In addition, please refer to the following details of the method for fabricating the organic light emitting display panel for the fabrication process of the organic light emitting display panel of the first and second embodiments.
Please refer to fig. 3 and 4. The embodiment of the present application also relates to a method for manufacturing an organic light emitting display panel 100, which includes the following steps:
step S1: a display substrate 11 is provided, the display substrate 11 includes a display region 11a and a non-display region 11b located at an outer peripheral side of the display region 11 a.
Step S2: forming a touch control structure layer 12 on a display substrate 11;
step S3: forming a polarizer 13 on the display substrate 11;
step S4: an optical adhesive layer 14 and a cover plate 15 are sequentially formed on the polarizer 13.
Further, referring to fig. 5 and 6, in step S3, the forming of polarizer 13 on display substrate 11 includes the following steps:
step S31: forming a retaining wall 131 on the display substrate 11, wherein the retaining wall 131 is correspondingly arranged in the non-display area 11b and is surrounded on the outer periphery side of the display area 11 a;
step S32: forming a first alignment layer 132 between the barriers 131 by using an inkjet printing process, the first alignment layer 132 covering the display region 11 a;
step S33: forming 1/4 a retardation layer 133 on the first alignment layer 132 using an inkjet printing process, the 1/4 a retardation layer 133 covering the display region 11 a;
step S34: forming a second alignment layer 134 on the 1/4 λ phase difference layer 133 by an inkjet printing process, the second alignment layer 134 covering the display region 11 a;
step S35: forming a polarizing layer 135 on the second alignment layer 134 using an inkjet printing process, the polarizing layer 135 covering the display area 11 a;
step S36: a first protective layer 136 is formed on the polarizing layer 135, and the first protective layer 136 covers the display area 11a and the non-display area 11 b.
In the method for manufacturing the organic light emitting display panel of the first embodiment, the polarizer 13 is integrated on the touch control structure layer 12 by using an inkjet printing process, so that the thickness of the polarizer 13 is reduced, and the bending reliability of the organic light emitting display panel 100 is further improved.
A method of manufacturing the organic light emitting display panel of the first embodiment is explained below.
In step S1, a display substrate 11 is provided, the display substrate 11 including a display area 11a and a non-display area 11b located at an outer peripheral side of the display area 11 a. The display substrate 11 includes a substrate, a barrier layer, a buffer layer, an active layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer, an interlayer dielectric layer, a source/drain metal layer, a planarization layer, an anode, a pixel defining layer, an organic light emitting layer, a cathode, and a packaging layer, which are sequentially disposed.
Optionally, the display substrate 11 may have a structure of a single-layer gate metal layer and a single-layer source-drain metal layer, or a structure of a double-gate metal layer and a double-source-drain metal layer. The structure of the display substrate 11 is conventional and will not be described herein. Subsequently, the process proceeds to step S2.
In step S2, a touch structure layer 12 is formed on the display substrate 11. Specifically, referring to fig. 7, step S2 includes the following steps:
step S21: forming a third insulating layer 121, a first touch electrode layer 122, a fourth insulating layer 123, and a second touch electrode layer 124 on the display substrate 11 in this order;
step S22: a patterned film layer is formed on the second touch electrode layer 124 by using a photolithography process, and the patterned film layer includes a second passivation layer 125 covering the second touch electrode layer 124 and a retaining wall 131 formed on the second passivation layer 125.
Specifically, in step S21, the third insulating layer 121 and the fourth insulating layer 123 are formed by coating or deposition. The third insulating layer 121 and the fourth insulating layer 123 are inorganic insulating layers, and the third insulating layer and the fourth insulating layer may be made of silicon nitride compound (SiNx) and/or silicon oxide compound (SiOx). The patterned first touch electrode layer 122 and the patterned second touch electrode layer 124 are formed by a photolithography process, and the first touch electrode layer 122 and the second touch electrode layer 124 may be made of TiAlTi, Mo, or other low-resistance metals. Subsequently, the process proceeds to step S22.
In step S22, a photoresist layer is coated on the second touch electrode layer 124, and then the photoresist layer is exposed using a gray-scale mask or a halftone mask, and then the photoresist layer is developed to form a patterned photoresist layer. The patterned photoresist layer includes a second passivation layer 125 covering the second touch electrode layer 124 and a barrier wall 131 formed on the second passivation layer 125. In step S22, the second passivation layer 125 and the retaining wall 131 are formed in one step by using a photolithography process, thereby saving a mask process.
In addition, the touch structure layer 12 also adopts an integrated form to form a film layer structure, so as to further thin the thickness of the organic light emitting display panel 100.
Subsequently, the process proceeds to step S3.
In step S3, polarizer 13 is formed on display substrate 11. Specifically, a polarizer 13 is formed on the touch structure layer 12.
In step S31, the retaining wall 131 and the second passivation layer 126 of the touch structure layer 12 are formed together by the same process. The retaining wall 131 includes a first retaining wall 1311 and a second retaining wall 1312. The first retaining wall 1311 is correspondingly provided around the outer periphery of the display region 11 a. The second wall 1312 surrounds the outer periphery of the first wall 1311. A channel is formed between the first wall 1311 and the second wall 1312. Wherein the second blocking wall 1312 functions to prevent the material of the polarizer 13 from overflowing. When the material of the polarizer 13 overflows the first retaining wall 1311, it flows into the channel, preventing further overflow of the material.
The thickness of the second blocking wall 1312 is smaller than that of the first blocking wall 1311. Such an arrangement facilitates subsequent planar flow of the first protective layer 136 to quickly form the planar first protective layer 136.
Referring to fig. 8, in step S32, an inkjet printing process is used to form a first alignment layer 132 between the retaining walls 131, which includes the following steps:
step S321: dissolving at least two kinds of orientation polymers in a solvent to form an orientation solution;
step S322: printing the orientation solution on a display area corresponding to the display substrate by adopting an ink-jet printer to form a first orientation layer in an initial state;
step S323: fixing the initial first orientation layer by adopting ultraviolet light to form the first orientation layer;
step S324: and rubbing the first alignment layer to enable the first alignment layer to have an alignment control force.
The alignment polymer may be polyamide, gelatin, polyimide having an imide bond, or a polyamic acid, polyvinyl alcohol, alkyl-modified polyvinyl alcohol, polyacrylamide, or the like, which is a hydrolysate thereof. The orientation solution is formed by dissolving at least two kinds of orientation polymers in a solvent. Subsequently, the process proceeds to step S33.
Referring to fig. 9, in step S33, a 1/4 λ phase difference layer 133 is formed on the first alignment layer 132 by an inkjet printing process, and the 1/4 λ phase difference layer 133 covers the display region 11 a. Step S33 includes the following steps:
s331: providing a first combined liquid, wherein the first combined liquid comprises a polymerizable liquid crystal compound;
s332: printing the first combined liquid on the first alignment layer by adopting an ink-jet printer to form a first liquid crystal film;
s333: and curing the first liquid crystal film by using ultraviolet light to form the 1/4 lambda phase difference layer.
The first combined liquid comprises a polymerizable liquid crystal compound, a solvent, a photopolymerization initiator, a photosensitizer, a polymerization inhibitor, a leveling agent, an adhesion improver and the like. Subsequently, the process proceeds to step S34.
In step S34, a second alignment layer 134 is formed on the 1/4 λ phase difference layer 133 using an inkjet printing process, the second alignment layer 134 covering the display region 11 a. Specifically, the preparation process of the second alignment layer 134 is similar to or the same as that of the first alignment layer 132, and is not repeated here. Subsequently, the process proceeds to step S35.
Referring to fig. 10, in step S35, a polarizing layer 135 is formed on the second alignment layer 134 by an inkjet printing process, and the polarizing layer 135 covers the display area 11 a. Step S35 includes the following steps:
step S351: providing a second combined liquid, wherein the second combined liquid is the polymerizable liquid crystal compound and the dichroic pigment;
step S352: printing the second combined liquid on the second alignment layer by adopting an ink-jet printer to form a second liquid crystal film;
step S353: and curing the second liquid crystal film by adopting ultraviolet light to form the polarizing layer.
Wherein the second combined liquid may include the first combined liquid and the dichroic pigment. Subsequently, the process proceeds to step S36.
In step S36, a first protective layer 136 is formed on the polarizing layer 135, the first protective layer 136 covering the display area 11a and the non-display area 11 b. Here, the first protective layer 136 may be formed by inkjet printing, and the first protective layer 136 covers the polarizing layer 135 and the retaining walls 131. The material of the first protection layer 136 may be organic materials such as acrylic resin, epoxy resin, and silicone. Subsequently, the process proceeds to step S4.
In step S4, an optical adhesive layer 14 and a cover 15 are sequentially formed on polarizer 13.
This completes the manufacturing process of the organic light emitting display panel of the first embodiment.
Please refer to fig. 11 and 12. The embodiment of the present application also relates to a method for manufacturing the organic light emitting display panel 200, which includes the following steps:
step S10: a display substrate 21 is provided, the display substrate 21 including a display area 21a and a non-display area 21b located at an outer peripheral side of the display area 21 a.
Step S20: forming a polarizer 23 on the display substrate 21;
step S30: forming a touch control structure layer 22 on the display substrate 21;
step S40: an optical adhesive layer 24 and a cover plate 25 are sequentially formed on the touch control structure layer 22.
Further, referring to fig. 13 and 14, step S20 is a step of forming polarizer 23 on display substrate 21, including the following steps:
step S201: forming a retaining wall 231 on the display substrate 21, wherein the retaining wall 231 is correspondingly arranged in the non-display area 21b and is surrounded on the outer periphery side of the display area 21 a;
step S202: forming a first alignment layer 232 between the barriers 231 by using an inkjet printing process, the first alignment layer 232 covering the display region 21 a;
step S203: forming 1/4 a retardation layer 233 on the first alignment layer 232 using an inkjet printing process, the 1/4 a retardation layer 233 covering the display region 21 a;
step S204: forming a second alignment layer 234 on the 1/4 λ phase difference layer 233 using an inkjet printing process, the second alignment layer 234 covering the display area 21 a;
step S205: forming a polarizing layer 235 on the second alignment layer 234 using an inkjet printing process, the polarizing layer 235 covering the display area 21 a;
step S206: a first protective layer 236 is formed on the polarizing layer 235, and the first protective layer 236 covers the display area 21a and the non-display area 21 b.
In the method for manufacturing the organic light emitting display panel according to the second embodiment, the polarizer 23 is integrated on the display substrate 21 by using an inkjet printing process, so that the thickness of the polarizer 23 is reduced, and the bending reliability of the organic light emitting display panel 200 is improved.
A method of manufacturing the organic light emitting display panel of the second embodiment is explained below.
In step S10, a display substrate 21 is provided, the display substrate 21 including a display area 21a and a non-display area 21b located on an outer peripheral side of the display area 21 a. The structure of the display substrate 21 in step S10 is similar to or the same as the structure of the display substrate 11 of the method for manufacturing an organic light emitting display panel of the first embodiment, and for details, reference is made to the contents of the above embodiments, and details are not repeated here. Subsequently, the process proceeds to step S20.
In step S20, polarizer 23 is formed on display substrate 21. Specifically, in step S201, a retaining wall 231 is formed on the display substrate 21, and the retaining wall 231 is correspondingly disposed in the non-display area 21b and is surrounded by the outer periphery of the display area 21 a.
That is, a photoresist layer is coated on the encapsulation layer of the display substrate 21, and then a patterned photoresist layer is formed by using a photolithography process, wherein the patterned photoresist layer includes the dam 231.
The retaining wall 231 includes a first retaining wall 2311 and a second retaining wall 2312. The first retaining wall 2311 is correspondingly surrounded on the outer peripheral side of the display area 21 a. The second retaining wall 2312 surrounds the outer peripheral side of the first retaining wall 2311. A channel is formed between the first retaining wall 2311 and the second retaining wall 2312. Wherein the second blocking wall 2312 functions to prevent the material of the polarizer 23 from overflowing. When the material of the polarizer 23 overflows the first retaining walls 2311, the material flows into the channels, and further overflow of the material is prevented.
The thickness of the second retaining wall 2312 is less than the thickness of the first retaining wall 2311. Such an arrangement facilitates subsequent flat flow of the first protective layer 236 to quickly form a flat first protective layer 236. Subsequently, the process proceeds to step S202.
In step S202, a first alignment layer 232 is formed between the retaining walls 231 using an inkjet printing process, and the first alignment layer 232 covers the display region 21 a. The first alignment layer 232 is covered on the encapsulation layer of the display substrate 21. The preparation process of the first alignment layer 232 is the same as that of the first alignment layer 132 of the organic light emitting display panel of the first embodiment, and is not described herein again.
Subsequently, the process proceeds to step S203, step S204, step S205, and step S206 in this order. The processes of step S203, step S204, step S205, and step S206 correspond to and are the same as step 33, step 34, step 35, and step 36 of the organic light emitting display panel of the first embodiment, and are not described again here.
Subsequently, step S30 is performed to form the touch structure layer 22 on the display substrate 21. Specifically, a third insulating layer, a first touch electrode layer, a fourth insulating layer, a second touch electrode layer, and a second protective layer are sequentially formed on the polarizer 23.
The manufacturing process of the touch structure layer 22 of the second embodiment is different from the manufacturing process of the touch structure layer 22 of the organic light emitting display panel of the first embodiment only in that: the touch structure layer 22 of the second embodiment does not need to form a second passivation layer and a barrier wall at the same time, which is not described herein again.
Subsequently, step S40 is performed to sequentially form the optical adhesive layer 24 and the cover plate 25 on the touch structure layer 22.
This completes the manufacturing process of the organic light emitting display panel of the second embodiment.
The organic light-emitting display panel integrates the polaroid on the display substrate or the touch control structure layer by adopting an ink-jet printing process, so that the thickness of the polaroid is thinned, and the bending reliability of the organic light-emitting display panel is further improved.
The organic light emitting display panel and the method for manufacturing the same provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are explained in the present application by applying specific examples, and the description of the embodiments above is only used to help understanding the technical solutions and the core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. An organic light emitting display panel, comprising:
the display substrate is used for displaying pictures and comprises a display area and a non-display area positioned on the outer periphery side of the display area;
the touch control structure layer is arranged on the display substrate; and
the polaroid is integrated on the display substrate or the touch control structural layer;
the polarizer includes:
the retaining wall is correspondingly arranged in the non-display area and surrounds the periphery of the display area, and the retaining wall is formed on the display substrate or the touch control structure layer;
a first alignment layer formed between the retaining walls and covering the display region;
1/4 a λ phase difference layer, the 1/4 λ phase difference layer being formed on the first alignment layer and covering the display area;
a second alignment layer formed on the 1/4 lambda phase difference layer and covering the display area;
a polarizing layer formed on the second alignment layer and covering the display region; and
a first protective layer formed on the polarizing layer and covering the display area and the non-display area.
2. The organic light-emitting display panel according to claim 1, wherein the retaining wall comprises a first retaining wall and a second retaining wall, the first retaining wall is correspondingly surrounded on the periphery of the display area, the second retaining wall is surrounded on the periphery of the first retaining wall, and a channel is formed between the first retaining wall and the second retaining wall.
3. The organic light-emitting display panel according to claim 1, wherein the display substrate comprises a substrate, a barrier layer, a buffer layer, an active layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer, an interlayer dielectric layer, a source drain metal layer, a planarization layer, an anode, a pixel defining layer, an organic light-emitting layer, a cathode, and an encapsulation layer, which are sequentially disposed;
the touch control structure layer comprises a third insulating layer, a first touch control electrode layer, a fourth insulating layer, a second touch control electrode layer and a second protective layer which are sequentially arranged.
4. A method for manufacturing an organic light emitting display panel includes the following steps:
providing a display substrate, wherein the display substrate comprises a display area and a non-display area positioned on the outer periphery side of the display area;
forming a touch control structure layer on the display substrate;
forming a polarizer on the display substrate;
wherein, the formation of the polarizer on the display substrate comprises the following steps:
forming a retaining wall on the display substrate, wherein the retaining wall is correspondingly arranged in the non-display area and surrounds the periphery of the display area;
forming a first orientation layer between the retaining walls by adopting an ink-jet printing process, wherein the first orientation layer covers the display area;
forming an 1/4 lambda phase difference layer on the first alignment layer using an inkjet printing process, the 1/4 lambda phase difference layer covering the display region;
forming a second alignment layer on the 1/4 lambda phase difference layer using an inkjet printing process, the second alignment layer covering the display region;
forming a polarizing layer on the second alignment layer by using an inkjet printing process, the polarizing layer covering the display area;
forming a first protective layer on the polarizing layer, the first protective layer covering the display area and the non-display area.
5. The method as claimed in claim 4, wherein the step of forming a touch structure layer on the display substrate comprises:
and sequentially forming a third insulating layer, a first touch electrode layer, a fourth insulating layer, a second touch electrode layer and a second protective layer on the polarizer.
6. The method as claimed in claim 4, wherein the step of forming a touch structure layer on the display substrate comprises:
sequentially forming a third insulating layer, a first touch electrode layer, a fourth insulating layer and a second touch electrode layer on the display substrate;
and forming a patterned film layer on the second touch electrode layer by adopting a photoetching process, wherein the patterned film layer comprises a second protective layer covering the second touch electrode layer and the retaining wall formed on the second protective layer.
7. The method as claimed in claim 5 or 6, wherein the retaining wall comprises a first retaining wall and a second retaining wall, the first retaining wall is correspondingly arranged around the periphery of the display region, the second retaining wall is arranged around the periphery of the first retaining wall, and a channel is formed between the first retaining wall and the second retaining wall.
8. The method for manufacturing an organic light-emitting display panel according to claim 4, wherein the step of forming the first alignment layer between the retaining walls by using an inkjet printing process comprises the steps of:
dissolving at least two kinds of orientation polymers in a solvent to form an orientation solution;
printing the orientation solution on a display area corresponding to the display substrate by adopting an ink-jet printer to form a first orientation layer in an initial state;
fixing the initial first orientation layer by adopting ultraviolet light to form the first orientation layer;
and rubbing the first alignment layer to enable the first alignment layer to have an alignment control force.
9. The method for manufacturing an organic light-emitting display panel according to claim 4, wherein the step of forming an 1/4 λ phase difference layer on the first alignment layer by an inkjet printing process comprises the steps of:
providing a first combined liquid, wherein the first combined liquid comprises a polymerizable liquid crystal compound;
printing the first combined liquid on the first alignment layer by adopting an ink-jet printer to form a first liquid crystal film;
and curing the first liquid crystal film by using ultraviolet light to form the 1/4 lambda phase difference layer.
10. The method for manufacturing an organic light-emitting display panel according to claim 9, wherein the forming a polarizing layer on the second alignment layer by an inkjet printing process comprises:
providing a second combined liquid, wherein the second combined liquid is the polymerizable liquid crystal compound and the dichroic pigment;
printing the second combined liquid on the second alignment layer by adopting an ink-jet printer to form a second liquid crystal film;
and curing the second liquid crystal film by adopting ultraviolet light to form the polarizing layer.
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