CN106449707B - Organic light-emitting display panel and manufacturing method thereof - Google Patents
Organic light-emitting display panel and manufacturing method thereof Download PDFInfo
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- CN106449707B CN106449707B CN201610929390.XA CN201610929390A CN106449707B CN 106449707 B CN106449707 B CN 106449707B CN 201610929390 A CN201610929390 A CN 201610929390A CN 106449707 B CN106449707 B CN 106449707B
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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
- H10K59/40—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
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The embodiment of the invention discloses an organic light-emitting display panel and a manufacturing method thereof. Wherein the organic light emitting display panel includes: the organic light-emitting element array substrate is covered with a thin film packaging layer of the organic light-emitting element array substrate, the thin film packaging layer comprises at least one inorganic layer and at least two organic layers, and a first touch electrode is positioned between the two adjacent organic layers and is in contact with the two adjacent organic layers; the two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is positioned on one side of the first touch electrode opposite to the organic light-emitting element array substrate, and the second organic layer is positioned on one side of the first touch electrode departing from the organic light-emitting element array substrate. The technical scheme provided by the embodiment of the invention can solve the problem that when the touch electrode is positioned in the thin film packaging layer in the organic light-emitting display panel, the inorganic layer in the thin film packaging layer cracks, so that the touch electrode cracks in extensibility, and the touch is invalid.
Description
Technical Field
The embodiment of the invention relates to the technical field of organic light-emitting display, in particular to an organic light-emitting display panel and a manufacturing method thereof.
Background
The conventional display panel generally has touch and display functions, and the detection of a touch position is realized through a touch electrode in the display panel with the touch function.
Generally, the touch electrode is integrated on a protective film or a polarizer in the display panel, and the scheme has high requirements for manufacturing the protective film or the polarizer. Alternatively, the touch electrode is integrated inside the thin film encapsulation layer of the display panel, for example, the touch electrode is integrated between the organic layer and the inorganic layer of the thin film encapsulation layer, that is, the organic layer and the inorganic layer sandwich the touch electrode, and when the touch electrode is integrated between the organic layer and the inorganic layer of the thin film encapsulation layer, the touch electrode is generally in contact with the inorganic layer and the organic layer sandwiching the touch electrode. However, due to the characteristics of the material of the inorganic layer, cracks are easy to occur, and after the inorganic layer cracks, extending cracks occur in the touch electrode in contact with the inorganic layer, so that abnormal touch is caused.
Disclosure of Invention
The invention provides an organic light-emitting display panel and a manufacturing method thereof, which aim to solve the problem that an inorganic layer in a thin film packaging layer in the organic light-emitting display panel cracks to cause extending cracks of a touch electrode to cause abnormal touch.
In a first aspect, an embodiment of the present invention provides an organic light emitting display panel, including:
an organic light emitting element array substrate;
a thin film encapsulation layer covering the organic light emitting element array substrate, the thin film encapsulation layer including at least one inorganic layer and at least two organic layers;
the first touch electrode is positioned between the two adjacent organic layers and is in contact with the two adjacent organic layers;
the two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is located on one side, opposite to the organic light-emitting element array substrate, of the first touch electrode, and the second organic layer is located on one side, away from the organic light-emitting element array substrate, of the first touch electrode.
In a second aspect, an embodiment of the present invention further provides a method for manufacturing an organic light emitting display panel, including:
forming an organic light emitting element array substrate;
forming a thin film packaging layer and a first touch electrode which cover the organic light-emitting element array substrate;
the film packaging layer comprises at least one inorganic layer and at least two organic layers, and the first touch electrode is positioned between and in contact with the two adjacent organic layers;
the two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is located on one side, opposite to the organic light-emitting element array substrate, of the first touch electrode, and the second organic layer is located on one side, away from the organic light-emitting element array substrate, of the first touch electrode.
According to the technical scheme provided by the embodiment of the invention, the touch electrode (the first touch electrode) is positioned in the film packaging layer, so that the touch electrode is prevented from being corroded by external water vapor and the like. In the prior art, when the touch electrode is disposed inside the thin film encapsulation layer, the touch electrode is generally located between an inorganic layer and an organic layer, and is in contact with the inorganic layer, since cracks easily occur due to characteristics of a material of the inorganic layer, after the touch electrode is in contact with the inorganic layer, the cracks appearing on the inorganic layer easily cause cracks of extensibility of the touch electrode, resulting in abnormal touch. In the organic light emitting display panel provided in the embodiment of the present invention, the touch electrode is located between two organic layers of the film encapsulation layer and is in contact with the two organic layers, that is, the two organic layers wrap the touch electrode, and the touch electrode is only in contact with the organic layer in the film encapsulation layer. The touch electrode can be prevented from contacting the inorganic layer, and even if cracks appear on the inorganic layer in the thin film packaging layer, the cracks with extensibility can not be caused to the touch electrode, so that the problem of abnormal touch caused by the cracks with extensibility which are caused to the touch electrode when the cracks appear on the inorganic layer is solved.
Drawings
FIG. 1A is a schematic cross-sectional view of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 1B is a schematic cross-sectional view of another organic light emitting display panel in accordance with an embodiment of the present invention;
FIG. 1C is a schematic flow chart illustrating a method for fabricating an organic light emitting display panel according to an embodiment of the present invention;
fig. 2A is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 2B is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 2C is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 2D is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 2E is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 3A is a top view of another organic light emitting display panel according to an embodiment of the present invention;
fig. 3B is a top view of another organic light emitting display panel according to an embodiment of the present invention;
fig. 4A is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 4B is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 4C is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention;
fig. 4D is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
An embodiment of the present invention provides an organic light emitting display panel, including:
an organic light emitting element array substrate;
a thin film encapsulation layer covering the organic light emitting element array substrate, the thin film encapsulation layer including at least one inorganic layer and at least two organic layers;
the first touch electrode is positioned between the two adjacent organic layers and is in contact with the two adjacent organic layers;
the two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is positioned on one side of the first touch electrode opposite to the organic light-emitting element array substrate, and the second organic layer is positioned on one side of the first touch electrode away from the organic light-emitting element array substrate.
Exemplarily, referring to fig. 1A, fig. 1A is a schematic cross-sectional view of an organic light emitting display panel according to an embodiment of the present invention. The display panel includes:
an organic light emitting element array substrate 11;
a thin film encapsulation layer 12 covering the organic light emitting element array substrate, the thin film encapsulation layer 12 including an inorganic layer 121 and two organic layers, a first organic layer 122 and a second organic layer 123;
and the first touch electrode 13 is positioned between the adjacent first organic layer 122 and the second organic layer 123, and the first touch electrode 13 is in contact with the adjacent first organic layer 122 and the second organic layer 123. The first organic layer 122 is located on a side of the first touch electrode 13 facing the organic light emitting device array substrate 11, and the second organic layer 123 is located on a side of the first touch electrode 13 facing away from the organic light emitting device array substrate 11.
In this embodiment, the organic light emitting device array substrate 11 may include a substrate 111, a pixel driving circuit 112, and an organic light emitting device array 113, and the pixel driving circuit 112, the organic light emitting device array 113, and the thin film encapsulation layer 12 are sequentially disposed on one side of the substrate 111. Specifically, the organic light emitting element array 113 may include a plurality of organic light emitting elements arranged in an array, and the organic light emitting elements may include a first electrode, an organic light emitting layer, and a second electrode that are stacked, wherein the organic light emitting layer is located between the first electrode and the second electrode. The pixel driving circuit 112 may include a plurality of thin film transistors for driving the organic light emitting elements in the organic light emitting element array to emit light to display an image. The substrate 111 may be a flexible substrate. The shape of the first touch electrode 13 may be a grid shape, for example, the first touch electrode 13 may be a metal grid electrode.
In the organic light-emitting display panel structure, the touch electrode (the first touch electrode) is positioned inside the thin film packaging layer, so that the touch electrode is prevented from being corroded by external water vapor and the like. In the prior art, when the touch electrode is disposed inside the thin film encapsulation layer, the touch electrode is generally located between an inorganic layer and an organic layer, and is in contact with the inorganic layer, since cracks easily occur due to characteristics of a material of the inorganic layer, after the touch electrode is in contact with the inorganic layer, the cracks appearing on the inorganic layer easily cause cracks of extensibility of the touch electrode, resulting in abnormal touch. In the organic light emitting display panel provided in the embodiment of the present invention, the touch electrode is located between two organic layers of the thin film encapsulation layer and is in contact with the two organic layers, that is, the organic layer completely wraps the touch electrode, and the touch electrode is only in contact with the organic layer in the thin film encapsulation layer. The touch electrode can be prevented from contacting the inorganic layer, and even if cracks appear on the inorganic layer in the thin film packaging layer, the cracks with extensibility can not be caused to the touch electrode, so that the problem of abnormal touch caused by the cracks with extensibility which are caused to the touch electrode when the cracks appear on the inorganic layer is solved. In addition, in the embodiment, when the touch electrode is a metal grid electrode, the touch electrode is less in contact with the organic layer, and the touch electrode is not easy to have an extending crack. The above-mentioned risks can be further circumvented. When the touch electrode is a metal grid electrode, along a direction perpendicular to the organic light emitting element array substrate, a projection of a pixel in the organic light emitting display panel on the metal grid electrode is located in a hollow area of the metal grid electrode, that is, light emitted by the organic light emitting element is provided to the pixel through the hollow area of the metal grid. In the conventional ITO touch electrode, light emitted from the organic light emitting device needs to be provided to the pixel through the ITO touch electrode, and the metal grid electrode has a higher light transmittance than the touch electrode using the ITO touch electrode. And the sheet resistance of the touch electrode is small when the metal grid electrode is adopted, for example, the sheet resistance of the metal grid electrode is generally not more than 1 ohm, and the sheet resistance of the ITO touch electrode is dozens of ohms. When the metal grid electrode is adopted, since metal is more easily corroded, the touch electrode is positioned in the film packaging layer, and the corrosion of external water vapor to the touch electrode can be avoided.
In the thin film encapsulation layer 12 shown in fig. 1A, an inorganic layer 121, a first organic layer 122, and a second organic layer 123 are exemplarily disposed, the number of inorganic layers disposed is one, and the number of organic layers disposed is two. In other embodiments of the embodiment of the present invention, the number of the inorganic layers disposed in the thin film encapsulation layer 12 may be greater than one, and the number of the organic layers disposed may be greater than two, but two organic layers are required to be disposed adjacently, and the first touch electrode is located between and in contact with the adjacent two organic layers. In fig. 1A, an inorganic layer 121 is disposed between the first organic layer 122 and the organic light emitting device array substrate, and in other embodiments of the present invention, a plurality of inorganic layers and a plurality of organic layers may be disposed between the first organic layer 122 and the organic light emitting device array substrate. Exemplarily, referring to fig. 1B, fig. 1B is a schematic cross-sectional view of another organic light emitting display panel provided by an embodiment of the present invention. The thin film encapsulation layer 12 in the organic light emitting display panel comprises an inorganic layer 121, an organic layer 122, an inorganic layer 123, an organic layer 124, an inorganic layer 125, an organic layer 126, an organic layer 127 and an inorganic layer 128, wherein the organic layer 126 is a first organic layer, the organic layer 127 is a second organic layer, and three inorganic layers and two organic layers are arranged between the first organic layer and the organic light emitting element array substrate. The first touch electrode is arranged in the thin film packaging layer, so that the packaging performance of the thin film packaging layer can be influenced by the first touch electrode, and when a plurality of inorganic layers and a plurality of organic layers are arranged between the first organic layer and the organic light-emitting element array substrate, the thin film packaging layer can be reliably packaged. In this embodiment, at least one inorganic layer may be disposed above a side of the second organic layer away from the organic light emitting device array substrate, for example, in fig. 1B, an inorganic layer 128 is further disposed above the second organic layer 127 in contact with the first touch electrode 13, and the inorganic layer 128 may prevent moisture and oxygen from corroding the touch electrode 14, so as to further enhance the encapsulation performance of the thin film encapsulation layer. In the organic light emitting display panel provided by the embodiment of the invention, the organic light emitting device array may be in contact with the inorganic layer 121 of the thin film encapsulation layer. That is, after the organic light emitting element array is formed, the inorganic layer 121 is formed next, and the inorganic layer 121 is in contact with the organic light emitting element array. Specifically, the inorganic layer 121 may be formed immediately after the first electrode, the organic light-emitting layer, and the second electrode of the organic light-emitting element are formed, and the inorganic layer 121 may be in contact with the second electrode. The inorganic layer has strong barrier capability, such as water and oxygen barrier capability, so that the organic light-emitting element can be protected from the influence of water and oxygen, and the service life of the organic light-emitting element is prolonged.
In other embodiments of the invention, a groove may be further disposed on a side of the first organic layer 122 away from the organic light emitting device array substrate 12 in fig. 1A, and the first touch electrode 13 is located in the groove. The projection of the groove on the plane of the organic light-emitting element array substrate can be a block pattern or a grid pattern. That is to say, the shape of the groove disposed on the side of the first organic layer 122 away from the organic light emitting device array substrate 12 is a block or a grid, and accordingly, the first touch electrode 13 located in the groove may also be a block or a grid, that is, the shape of the first touch electrode is the same as that of the groove, and the groove just accommodates the first touch electrode.
The embodiment of the invention also provides a manufacturing method of the organic light-emitting display panel, which can be used for manufacturing the organic light-emitting display panel shown in fig. 1A. Referring to fig. 1C, the method includes:
and S110, forming the organic light-emitting element array substrate.
The organic light emitting element array can be formed on the substrate through processes such as evaporation or sputtering, specifically, a first electrode of the organic light emitting element can be formed on the substrate through processes such as evaporation or sputtering, and after the first electrode is formed, an organic light emitting layer and a second electrode can be formed on one side of the first electrode, which is far away from the substrate, through processes such as evaporation or sputtering. The first electrode or the second electrode may be a transparent electrode, a semi-transparent electrode, or a reflective electrode, and the material of the first electrode and the second electrode may include any one or a combination of two or more of Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), Al, Ag, or Mg.
S120, forming a thin film packaging layer covering the organic light-emitting element array substrate and a first touch electrode;
the film packaging layer comprises at least one inorganic layer and at least two organic layers, and the first touch electrode is located between the two adjacent organic layers and is in contact with the two adjacent organic layers. The two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is positioned on one side of the first touch electrode opposite to the organic light-emitting element array substrate, and the second organic layer is positioned on one side of the first touch electrode departing from the organic light-emitting element array substrate.
The organic layer and the inorganic layer in the thin film encapsulation layer can be formed by film-forming deposition, and specifically, the organic layer or the inorganic layer in the thin film encapsulation layer can be formed by physical vapor deposition, chemical vapor deposition, atomic layer deposition, spin coating, inkjet printing and other processes. The organic layer may be formed of a polymer, and may include a single layer formed of one material among polyethylene terephthalate, polyimide, polycarbonate, epoxy, polyethylene, and polyacrylate, or a deposited layer formed of a plurality of materials. The inorganic layer may include a deposition layer formed of one or more materials of a metal oxide and a metal nitride. More specifically, the inorganic layer may include a deposition layer formed of one or more materials of SiNx, Al2O3, SiO2, and TiO 2. In this embodiment, both the organic layer provided with the groove and the touch electrode may be formed by inkjet printing. The touch electrode can be formed by sputtering, evaporation, ink jet printing, or by a series of processes such as film formation, exposure, and development. When the first organic layer is provided with the grid-shaped grooves, the first organic layer and the grooves on the first organic layer can be formed by one process of inkjet printing. And then, forming a grid-shaped first touch electrode in the groove of the first organic layer by ink-jet printing, wherein the grid-shaped first touch electrode can be made of nano metal wires, such as nano silver wires.
In an embodiment of the present invention, before forming the first touch electrode, the method further includes: at least one inorganic layer and at least one organic layer are formed on the organic light emitting element array substrate, and the inorganic layer is closest to the organic light emitting element array substrate. For example, referring to fig. 1B, before forming the first touch electrode, three inorganic layers and three organic layers are formed on the organic light emitting device array substrate, and the inorganic layer closest to the organic light emitting device array substrate is the inorganic layer
According to the manufacturing method of the organic light-emitting display panel provided by the embodiment of the invention, when the touch electrode is the metal grid electrode, the touch electrode can be positioned in the groove of the organic layer, and the organic layer with the groove can be formed through ink-jet printing. When the organic layer provided with the groove is formed through ink-jet printing, the groove does not need to be formed through processes such as exposure, etching and the like, so that the characteristic attenuation of the material of the organic light-emitting element caused by the exposure process can be prevented, and acid or alkaline liquid medicine in the etching process corrodes the organic layer or the inorganic layer of the thin film packaging layer. The touch electrode is formed in the groove of the organic layer through ink-jet printing, and the touch electrode material is sprayed in the groove after ink drops are formed, so that the formed touch electrode is low in position offset, and the problem of large position deviation of the touch electrode in an exposure mode is solved. Specifically, in the embodiment of the present invention, the grooves on the organic layer and the contact electrodes located in the grooves are formed by exposure, and when forming the touch electrodes, the grooves on the inorganic layer are aligned using the mask, so that the formed touch electrodes have large positional deviation, and the touch electrodes are easily formed at positions other than the grooves. In the embodiment of the invention, the touch electrode is formed in the groove structure of the organic layer by adopting an ink-jet printing mode, the touch electrode material is sprayed in the groove after forming ink drops, the sprayed ink drops easily flow into the groove, and another organic layer covering the touch electrode is formed by ink-jet printing after forming the touch electrode, so that the touch electrode can be wrapped by the two organic layers, and the touch electrode is prevented from generating extension cracks when cracks occur on the inorganic layer.
Optionally, fig. 2A is a schematic structural diagram of another organic light emitting display panel provided in an embodiment of the present invention. Referring to fig. 2A, the organic light emitting display panel includes: the organic light emitting device includes an organic light emitting device array substrate 11, and a thin film encapsulation layer 12 covering the organic light emitting device array substrate 11, wherein the thin film encapsulation layer 12 includes an inorganic layer 121 and two organic layers, which are a first organic layer and a second organic layer. The first touch electrode includes a plurality of touch electrode blocks 130 arranged in an array, and the touch electrode blocks 130 are located between and in contact with adjacent first and second organic layers (the first organic layer 122 is shown, and the second organic layer is not shown).
Fig. 2B is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention. Referring to fig. 2B, the touch electrode is not shown, and referring to fig. 2B, a plurality of grooves arranged in an array are disposed on a side of the first organic layer 122 away from the organic light emitting device array substrate, and the first touch electrode is located in the groove 15. The shape of the groove 15 is a block, and the shape of the first touch electrode is the same as that of the groove 15, and is also a block. Referring to fig. 2C, fig. 2C is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention, and fig. 2C shows a touch electrode 13 on the basis of fig. 2B.
Fig. 2D is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention. Referring to fig. 2D, the touch electrode is not shown, and referring to fig. 2D, a plurality of grooves 15 arranged in an array are disposed on a side of the first organic layer 122 away from the organic light emitting device array substrate, the first touch electrode is located in the groove 15, the groove 15 is in a grid shape, and the shape of the touch electrode is the same as that of the groove 15, and is also in a grid shape. Fig. 2E is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention, and fig. 2E shows the touch electrode 13 on the basis of fig. 2D.
Accordingly, another method for manufacturing an organic light emitting display panel is provided in an embodiment of the present invention, and the method may be used to manufacture the organic light emitting display panel shown in fig. 2A, and includes:
and S211, forming the organic light-emitting element array substrate 11.
S212, an inorganic layer 121 is formed on the organic light emitting element array substrate 11.
S213, a first organic layer 122 is formed on the inorganic layer.
S214, forming a first touch electrode block 130 on a side of the first organic layer 122 away from the organic light emitting device array substrate.
S215, forming a second organic layer covering the first touch electrode block 130;
s216, at least one inorganic layer is formed on the second organic layer.
In this embodiment, the first organic layer is formed on the inorganic layer, which means that the first organic layer is formed on the side of the inorganic layer away from the organic light emitting element array substrate. At least one inorganic layer is formed over the second organic layer, which means that at least one inorganic layer is formed on the side of the second organic layer away from the organic light emitting element array substrate.
Embodiments of the present invention provide another method for manufacturing an organic light emitting display panel, which can be used to manufacture the organic light emitting display panel shown in any one of fig. 2B to 2E. The method comprises the following steps:
and S221, forming the organic light-emitting element array substrate 11.
S222, the inorganic layer 121 is formed on the organic light emitting element array substrate 11 by inkjet printing.
S223, the first organic layer 122 including the groove 15 is formed by inkjet printing.
S224, forming the first touch electrode 13 in the groove 15 by ink-jet printing.
S225, forming a second organic layer covering the first touch electrode 13 by inkjet printing.
S226, forming at least one inorganic layer over the second organic layer by inkjet printing.
Optionally, fig. 3A is a top view of another organic light emitting display panel provided in an embodiment of the present invention. Referring to fig. 3A, the organic light emitting display panel according to the embodiment of the present invention further includes a second touch electrode 14 on the basis of the organic light emitting display panel shown in fig. 1A, wherein the first touch electrode 13 and the second touch electrode 14 are disposed in a same layer in an insulating manner; the first touch electrodes 13 are arranged along a first direction X, and the second touch electrodes 14 are arranged along a second direction Y, where the first direction X intersects the second direction Y, and the first direction and the second direction preferably intersect perpendicularly. The second touch electrode 14 can be electrically connected through the conductive bridge 17.
Fig. 3B is a top view of another organic light emitting display panel according to an embodiment of the invention. Referring to fig. 3B, in the organic light emitting display panel according to the embodiment of the present invention, on the basis of the organic light emitting display panel shown in fig. 1A, a first groove 151 and a second groove 152 are disposed on the first organic layer 122; the first touch electrode 13 is located in the first groove 151, and the second touch electrode 14 is located in the second groove 152. In fig. 3B, the first touch electrode 13, the second touch electrode 14, the first groove 151 and the second groove 152 are all in a grid shape, and in other embodiments of the embodiment of the present invention, the first touch electrode, the second touch electrode, the first groove and the second groove may also be in a block shape. The second touch electrode 14 can be electrically connected through the conductive bridge 17.
Accordingly, another method for manufacturing an organic light emitting display panel is provided in an embodiment of the present invention, and the method may be used to manufacture the organic light emitting display panel shown in fig. 3A, and includes:
and S311, forming the organic light-emitting element array substrate 11.
S312, the inorganic layer 121 is formed on the organic light emitting device array substrate.
S313, the first organic layer 122 is formed on the inorganic layer.
S314, a first touch electrode 13 is formed on the first organic layer 122, and a second touch electrode 14 is also formed at the same time.
The first touch electrodes 13 and the second touch electrodes 14 are arranged in a same layer in an insulating manner, the first touch electrodes 13 are arranged along a first direction, the second touch electrodes 14 are arranged along a second direction, and the first direction and the second direction are crossed.
The embodiment of the invention provides another manufacturing method of an organic light-emitting display panel. The method may be used to fabricate the organic light emitting display panel shown in fig. 3B, and the method includes:
s321, forming the organic light emitting device array substrate 11.
S322, the inorganic layer 121 is formed on the organic light emitting element array substrate by inkjet printing.
S323, the first organic layer 122 including the first groove 151 and the second groove 152 is formed by inkjet printing.
S324, forming the first touch electrode 13 in the first groove 151 by inkjet printing, and simultaneously forming the second touch electrode 14 in the second groove 152.
S325, a second organic layer is formed over the first touch electrode 13 and the second touch electrode 14.
Optionally, fig. 4A is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention. The organic light emitting display panel provided in the embodiment of the invention further includes a second touch electrode 14 on the basis of the organic light emitting display panel shown in fig. 1A, wherein the thin film encapsulation layer 12 further includes a third organic layer 124, and the second touch electrode 14 is located between the second organic layer 123 and the third organic layer 124 and is in contact with the second organic layer 123 and the third organic layer 124 (shown in the figure is a schematic separation diagram of the layers). The second organic layer 123 is located on a side of the second touch electrode 14 opposite to the organic light emitting device array substrate 11, and the third organic layer 124 is located on a side of the second touch electrode 14 away from the organic light emitting device array substrate. The first touch electrode 13 and the second touch electrode 14 are crossed in an insulating way, and the first touch electrode 13 and the second touch electrode 14 are arranged in different layers;
fig. 4B is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention. In the organic light emitting display panel provided in the embodiment of the invention, on the basis of the organic light emitting display panel shown in fig. 4A, the first organic layer 122 is provided with a first groove 151, and the first touch electrode 13 is located in the first groove 151; the second organic layer is provided with a second groove 152, and the second touch electrode 14 is located in the second groove 152.
Optionally, fig. 4C is a schematic structural diagram of another organic light emitting display panel provided in the embodiment of the present invention. The organic light emitting display panel provided in the embodiment of the invention further includes a second touch electrode 14 on the basis of the organic light emitting display panel shown in fig. 1A, wherein the thin film encapsulation layer further includes a third organic layer 125 and a fourth organic layer 126, and the second touch electrode 14 is located between the third organic layer 125 and the fourth organic layer 126 and is in contact with the third organic layer 125 and the fourth organic layer 126. The third organic layer 125 is located on the side of the second touch electrode 14 opposite to the organic light emitting device array substrate 11, the fourth organic layer 126 is located on the side of the first touch electrode 14 away from the organic light emitting device array substrate 11, and an inorganic layer 124 is exemplarily disposed between the second organic layer 123 and the third organic layer 125. The first touch electrode 13 and the second touch electrode 14 are crossed in an insulating mode, and the first touch electrode 13 and the second touch electrode 14 are arranged in different layers.
Fig. 4D is a schematic structural diagram of another organic light emitting display panel according to an embodiment of the present invention. In the organic light emitting display panel provided in the embodiment of the invention, on the basis of the organic light emitting display panel shown in fig. 4C, a first groove 151 is disposed on the first organic layer 122, the first touch electrode 122 is located in the first groove 151, a second groove 152 is disposed on the third organic layer 125, and the second touch electrode 14 is located in the second groove 152.
Accordingly, another method for manufacturing an organic light emitting display panel is provided in an embodiment of the present invention, and the method may be used to manufacture the organic light emitting display panel shown in fig. 4A, and includes:
and S411, forming the organic light-emitting element array substrate 11.
S412, an inorganic layer 121 is formed on the organic light emitting element array substrate.
S413, forming a first organic layer 122 on the inorganic layer.
S414 forms a first touch electrode 13 on a side of the first organic layer 122 away from the organic light emitting device array substrate 11.
S415 forms the second organic layer 123 covering the first touch electrode 13.
And S416, forming a second touch electrode 14 on the side, away from the organic light emitting element array substrate 11, of the second organic layer 123.
S418, a third organic layer 124 covering the second touch electrode 14 is formed.
The first touch electrode 13 and the second touch electrode 14 are crossed in an insulated manner.
An embodiment of the present invention provides another method for manufacturing an organic light emitting display panel, which may be used to manufacture the organic light emitting display panel shown in fig. 4B, and the method includes:
and S421, forming the organic light-emitting element array substrate 11.
S422, the inorganic layer 121 is formed on the organic light emitting device array substrate.
S423, a first organic layer including the first groove 151 is formed on the inorganic layer 121 by inkjet printing.
S424, forming a first touch electrode 13 in the first groove 151 by inkjet printing.
S425, forming a second organic layer 123 covering the first touch electrode 13 and including the second groove 152 by inkjet printing.
S426, forming the second touch electrode 14 in the second groove 152 by inkjet printing.
S427, forming a fourth organic layer 124 covering the second touch electrode 14 by inkjet printing;
the first touch electrode 13 and the second touch electrode 14 are crossed in an insulated manner.
An embodiment of the present invention provides another method for manufacturing an organic light emitting display panel, which may be used to manufacture the organic light emitting display panel shown in fig. 4C, and the method includes:
and S431, forming the organic light-emitting element array substrate 11.
S332, forming an inorganic layer 121 on the organic light emitting element array substrate 11.
S433, a first organic layer 122 is formed on the inorganic layer 121.
S434, forming a first touch electrode 13 on a side of the first organic layer 122 away from the organic light emitting device array substrate 11.
S435, forming a second organic layer 123 covering the first touch electrode 13.
S436, the inorganic layer 124 is formed on the second organic layer 123.
S437, the third organic layer 125 is formed on the inorganic layer 124.
S438, forming a second touch electrode 14 on a side of the third organic layer 125 away from the organic light emitting device array substrate 11.
And S439, forming a fourth organic layer 126 covering the second touch electrode 14.
The first touch electrode 13 and the second touch electrode 14 are crossed in an insulated manner.
An embodiment of the present invention provides another method for manufacturing an organic light emitting display panel, which may be used to manufacture the organic light emitting display panel shown in fig. 4D, and the method includes:
s441, the organic light emitting device array substrate 11 is formed.
S442, an inorganic layer 121 is formed on the organic light emitting element array substrate.
S443, the first organic layer 122 including the first groove 151 is formed on the inorganic layer 121 by inkjet printing.
S444, forming the first touch electrode 13 in the first groove 151 by inkjet printing.
S445, forming the second organic layer 123 covering the first touch electrode 13 by inkjet printing.
S446, the inorganic layer 124 is formed on the second organic layer 123 by inkjet printing.
S447, the third organic layer 125 including the second grooves 152 is formed by inkjet printing.
S448, forming the second touch electrode 14 in the second groove 152 by inkjet printing.
S449, the fourth organic layer 126 covering the second touch electrode 14 is formed by inkjet printing.
The first touch electrode 13 and the second touch electrode 14 are crossed in an insulated manner.
In the present embodiment, in the organic light emitting display panel only provided with the first touch electrode, the first touch electrode serves as both the touch driving electrode and the touch sensing electrode. When in the touch stage, the touch driving signals are sequentially input into the touch electrodes, and the signals on the touch electrodes are detected. When a touch event occurs, each touch electrode is coupled with the human body capacitor, so that the capacitance of the touch electrode is changed. And determining the capacitance variation of the touch electrodes according to the received signals on the touch electrodes, and further determining the touch position. In an organic light emitting display panel provided with a first touch electrode and a second touch electrode, the first touch electrode is used as a touch driving electrode and the second touch electrode is used as a touch sensing electrode, or the first touch electrode is used as a touch sensing electrode and the second touch electrode is used as a touch driving electrode. In the touch stage, each touch driving electrode is sequentially input with a touch driving signal, each touch sensing electrode outputs a detection signal, and each touch driving electrode is coupled with each touch sensing electrode, so that the capacitance between the touch driving electrode and the touch sensing electrode is changed. The method for detecting the position of the touch point comprises the steps of sequentially inputting a touch driving signal to each touch driving electrode, and receiving an output detection signal at each touch sensing electrode, so that the capacitance value of the intersection point of all the touch driving electrodes and the touch sensing electrodes, namely the capacitance of the two-dimensional plane of the whole display panel, can be obtained, and the coordinate of the touch point can be calculated according to the two-dimensional capacitance variation data of the display panel.
As can be seen from the above description, the touch electrode (the first touch electrode) of the organic light emitting display panel provided in the embodiment of the invention is located inside the thin film encapsulation layer, so that corrosion of external moisture and the like to the touch electrode is avoided. The touch electrode is positioned between the two organic layers of the film packaging layer and is in contact with the two organic layers, namely the organic layers completely wrap the touch electrode, and the touch electrode is only in contact with the organic layers in the film packaging layer. The touch electrode can be prevented from contacting the inorganic layer, and even if cracks appear on the inorganic layer in the thin film packaging layer, the cracks with extensibility can not be caused to the touch electrode, so that the problem of abnormal touch caused by the cracks with extensibility which are caused to the touch electrode when the cracks appear on the inorganic layer is solved. In addition, in the embodiment, when the touch electrode is a metal grid electrode, the touch electrode is less in contact with the organic layer, and the touch electrode is not easy to have an extending crack. The above-mentioned risks can be further circumvented. When the touch electrode is a metal mesh electrode, the touch electrode may be located in a groove of the organic layer, and the organic layer provided with the groove may be formed by inkjet printing. When the organic layer provided with the groove is formed through ink-jet printing, the groove does not need to be formed through processes such as exposure, etching and the like, so that the characteristic attenuation of the material of the organic light-emitting element caused by the exposure process can be prevented, and acid or alkaline liquid medicine in the etching process corrodes the organic layer or the inorganic layer of the thin film packaging layer. The touch electrode is formed in the groove of the organic layer through ink-jet printing, and the touch electrode material is sprayed in the groove after ink drops are formed, so that the formed touch electrode is low in position offset, and the problem of large position deviation of the touch electrode in an exposure mode is solved. In the embodiment of the invention, the touch electrode is formed in the groove structure of the organic layer by adopting an ink-jet printing mode, the touch electrode material is sprayed in the groove after forming ink drops, the sprayed ink drops easily flow into the groove, and another organic layer covering the touch electrode is formed by ink-jet printing after forming the touch electrode, so that the touch electrode can be wrapped by the two organic layers, and the touch electrode is prevented from generating extension cracks when cracks occur on the inorganic layer.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (21)
1. An organic light emitting display panel, comprising:
an organic light emitting element array substrate;
a thin film encapsulation layer covering the organic light emitting element array substrate, the thin film encapsulation layer including at least one inorganic layer and at least two organic layers;
at least one layer of touch electrode, wherein each layer of touch electrode is wrapped between two adjacent organic layers in the film packaging layer;
the first touch electrode is positioned between the two adjacent organic layers and is in contact with the two adjacent organic layers;
the two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is positioned on one side of the first touch electrode facing the organic light-emitting element array substrate, and the second organic layer is positioned on one side of the first touch electrode departing from the organic light-emitting element array substrate;
at least one inorganic layer is arranged above one side of the second organic layer, which is far away from the organic light-emitting element array substrate; a plurality of inorganic layers and a plurality of organic layers are arranged between the first organic layer and the organic light-emitting element array substrate, and the organic light-emitting element array substrate is in contact with the inorganic layers in the thin film packaging layer.
2. The display panel according to claim 1, wherein the first touch electrode is in a grid shape.
3. The display panel of claim 1, wherein the first touch electrode comprises a plurality of touch electrode blocks arranged in an array.
4. The display panel according to claim 1, wherein a groove is disposed on a side of the first organic layer facing away from the organic light emitting device array substrate, and the first touch electrode is disposed in the groove.
5. The display panel according to claim 1, further comprising a second touch electrode, wherein the first touch electrode and the second touch electrode are disposed in a same layer and insulated from each other;
the first touch electrodes are arranged along a first direction, the second touch electrodes are arranged along a second direction, and the first direction is crossed with the second direction.
6. The display panel according to claim 5, wherein the first organic layer is provided with a first groove and a second groove;
the first touch electrode is located in the first groove, and the second touch electrode is located in the second groove.
7. The display panel according to claim 1, further comprising a second touch electrode;
the first touch electrode and the second touch electrode are crossed in an insulating mode, and the first touch electrode and the second touch electrode are arranged in different layers;
the thin film encapsulation layer further comprises a third organic layer;
the second touch electrode is positioned between the second organic layer and the third organic layer and is in contact with the second organic layer and the third organic layer;
the second organic layer is located on one side, facing the organic light emitting element array substrate, of the second touch electrode, and the third organic layer is located on one side, facing away from the organic light emitting element array substrate, of the second touch electrode.
8. The display panel according to claim 7, wherein a first groove is disposed on the first organic layer, and the first touch electrode is located in the first groove;
and a second groove is formed in the second organic layer, and the second touch electrode is positioned in the second groove.
9. The display panel according to claim 1, further comprising a second touch electrode;
the first touch electrode and the second touch electrode are crossed in an insulating mode, and the first touch electrode and the second touch electrode are arranged in different layers;
the thin film encapsulation layer further comprises a third organic layer and a fourth organic layer;
the second touch electrode is positioned between the third organic layer and the fourth organic layer and is in contact with the third organic layer and the fourth organic layer;
the third organic layer is located on one side, facing the organic light-emitting element array substrate, of the second touch electrode, and the fourth organic layer is located on one side, facing away from the organic light-emitting element array substrate, of the second touch electrode.
10. The display panel according to claim 9, wherein a first groove is disposed on the first organic layer, and the first touch electrode is located in the first groove;
and a second groove is formed in the third organic layer, and the second touch electrode is positioned in the second groove.
11. The display panel according to claim 6, 8 or 10, wherein a vertical projection of the first groove on the organic light emitting element array substrate is in a block pattern or a grid pattern;
the vertical projection of the second groove on the organic light-emitting element array substrate is a block pattern or a grid pattern.
12. A method of manufacturing an organic light emitting display panel, comprising:
forming an organic light emitting element array substrate;
forming a thin film packaging layer and a first touch electrode which cover the organic light-emitting element array substrate;
the organic light-emitting display panel comprises at least one layer of touch electrode, and each layer of touch electrode is wrapped between two adjacent organic layers in the film packaging layer; the first touch electrode is positioned between two adjacent organic layers and is in contact with the two adjacent organic layers;
the two organic layers adjacent to the first touch electrode are respectively a first organic layer and a second organic layer, the first organic layer is positioned on one side of the first touch electrode opposite to the organic light-emitting element array substrate, and the second organic layer is positioned on one side of the first touch electrode away from the organic light-emitting element array substrate; at least one inorganic layer is arranged above one side of the second organic layer, which is far away from the organic light-emitting element array substrate; a plurality of inorganic layers and a plurality of organic layers are arranged between the first organic layer and the organic light-emitting element array substrate, and the organic light-emitting element array substrate is in contact with the inorganic layers in the thin film packaging layer.
13. The method of manufacturing according to claim 12, further comprising, before forming the first touch electrode:
at least one inorganic layer and at least one organic layer are formed on the organic light-emitting element array substrate, and the inorganic layer is closest to the organic light-emitting element array substrate.
14. The method of claim 12, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer;
forming a first touch electrode block on one side of the first organic layer, which is far away from the organic light-emitting element array substrate;
forming a second organic layer covering the first touch electrode block;
at least one inorganic layer is formed over the second organic layer.
15. The method of claim 12, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer including a first groove by inkjet printing;
forming the first touch electrode in the first groove by inkjet printing;
forming a second organic layer covering the first touch electrode by inkjet printing;
at least one inorganic layer is formed over the second organic layer by inkjet printing.
16. The method of manufacturing according to claim 12, further comprising forming a second touch electrode simultaneously with the first touch electrode; the first touch electrodes and the second touch electrodes are arranged in a same-layer insulation manner, the first touch electrodes are arranged along a first direction, the second touch electrodes are arranged along a second direction, and the first direction is crossed with the second direction.
17. The method of claim 16, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer including a first groove and a second groove by inkjet printing;
and forming the first touch electrode in the first groove by ink-jet printing, and simultaneously forming the second touch electrode in the second groove.
18. The method of claim 12, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer;
forming the first touch electrode on one side of the first organic layer, which is far away from the organic light-emitting element array substrate;
forming a second organic layer covering the first touch electrode;
after forming a thin film encapsulation layer and a first touch electrode covering the organic light emitting element array substrate, the method further comprises the following steps: forming a second touch electrode on one side of the second organic layer, which is far away from the organic light-emitting element array substrate;
forming a third organic layer covering the second touch electrode;
the first touch electrode and the second touch electrode are crossed in an insulation mode.
19. The method of claim 12, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer;
forming the first touch electrode on one side of the first organic layer, which is far away from the organic light-emitting element array substrate;
forming a second organic layer covering the first touch electrode;
after forming a second organic layer covering the first touch electrode, further comprising:
forming a third organic layer;
forming a second touch electrode on one side of the third organic layer, which is far away from the organic light-emitting element array substrate;
forming a fourth organic layer covering the second touch electrode;
the first touch electrode and the second touch electrode are crossed in an insulation mode.
20. The method of claim 12, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer including a first groove by inkjet printing;
forming the first touch electrode in the first groove by inkjet printing;
after forming a thin film encapsulation layer and a first touch electrode covering the organic light emitting element array substrate, the method further comprises the following steps: forming a second organic layer covering the first touch electrode and including a second groove by inkjet printing;
forming a second touch electrode in the second groove by ink-jet printing;
forming a fourth organic layer covering the second touch electrode by inkjet printing;
the first touch electrode and the second touch electrode are crossed in an insulation mode.
21. The method of claim 12, wherein the forming a thin film encapsulation layer covering the organic light emitting device array substrate and the first touch electrode comprises:
forming a first organic layer including a first groove by inkjet printing;
forming the first touch electrode in the first groove by inkjet printing;
forming a second organic layer covering the first touch electrode by inkjet printing;
after forming a second organic layer covering the first touch electrode by inkjet printing, the method further includes:
forming a third organic layer including a second groove by inkjet printing;
forming a second touch electrode in the second groove by ink-jet printing;
forming a fourth organic layer covering the second touch electrode by inkjet printing;
the first touch electrode and the second touch electrode are crossed in an insulation mode.
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| CN107275512A (en) * | 2017-05-25 | 2017-10-20 | 厦门天马微电子有限公司 | A kind of organic EL display panel, its preparation method and display device |
| CN107482129A (en) * | 2017-07-25 | 2017-12-15 | 武汉华星光电半导体显示技术有限公司 | Packaging method, packaging structure and display device of organic electroluminescence device |
| CN107584819B (en) | 2017-08-29 | 2019-10-15 | 京东方科技集团股份有限公司 | A kind of touch base plate and preparation method thereof, touch device |
| TW201918844A (en) * | 2017-10-31 | 2019-05-16 | 瑞鼎科技股份有限公司 | In-cell capacitive touch panel |
| CN111201607A (en) * | 2017-11-09 | 2020-05-26 | 深圳市柔宇科技有限公司 | Touch display panel, touch device and touch display panel preparation method |
| CN111201606A (en) * | 2017-11-21 | 2020-05-26 | 深圳市柔宇科技有限公司 | Touch integrated display panel and preparation method thereof |
| CN110277426A (en) * | 2018-03-14 | 2019-09-24 | 上海和辉光电有限公司 | A kind of AMOLED display panel and preparation method thereof |
| CN108649140B (en) * | 2018-05-11 | 2019-09-20 | 武汉华星光电半导体显示技术有限公司 | OLED display panel and OLED display |
| US10770519B2 (en) | 2018-05-11 | 2020-09-08 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Organic light-emitting diode display panel and organic light-emitting diode display apparatus |
| CN109004004A (en) * | 2018-07-19 | 2018-12-14 | 武汉华星光电半导体显示技术有限公司 | A kind of display panel and preparation method thereof |
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