CN111326540B - Display panel, preparation method of display panel and display device - Google Patents
Display panel, preparation method of display panel and display device Download PDFInfo
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- CN111326540B CN111326540B CN201811446743.6A CN201811446743A CN111326540B CN 111326540 B CN111326540 B CN 111326540B CN 201811446743 A CN201811446743 A CN 201811446743A CN 111326540 B CN111326540 B CN 111326540B
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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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
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/822—Cathodes characterised by their shape
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The invention discloses a display panel, a preparation method of the display panel and a display device. The display panel includes: a substrate base; a plurality of independent organic light emitting units positioned at one side of the substrate, each independent organic light emitting unit comprising an anode electrode, an organic light emitting material layer and a cathode electrode which are positioned at one side of the substrate in sequence; the touch control unit is positioned on one side of the organic light emitting unit far away from the substrate base plate, and comprises at least one layer of touch control electrode, wherein at least part of touch control electrodes are positioned between two adjacent independent organic light emitting units and are arranged on the same layer with the cathode electrode. The technical scheme provided by the embodiment of the invention is used for realizing the purposes of reducing the thickness of the display panel, reducing the reflection of the cathode electrode to visible light and improving the display effect of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of organic light-emitting display, in particular to a display panel, a preparation method of the display panel and a display device.
Background
The existing display panel generally has the functions of touch control and display, and the detection of the touch control position is realized through the touch control electrode in the display panel with the touch control function.
At present, a cathode electrode in an Organic Light-Emitting Diode (OLED) device is generally a cathode electrode arranged on a whole layer, a touch electrode is arranged on the cathode electrode, and an insulating layer is also required to be arranged between the cathode electrode and the touch electrode, so that the thicker display panel is caused by more film layers, and the thinness and thinness of the display panel are not facilitated; meanwhile, the cathode electrode arranged on the whole layer can reflect light rays incident on the cathode electrode to influence the display effect of the display panel.
Disclosure of Invention
The invention provides a display panel, a preparation method of the display panel and a display device, which aim to reduce the thickness of the display panel and reduce the reflection of a cathode electrode.
In a first aspect, an embodiment of the present invention provides a display panel including:
a substrate base;
the organic light-emitting device comprises a substrate, a plurality of independent organic light-emitting units and a light-emitting unit, wherein the independent organic light-emitting units are positioned on one side of the substrate, and each independent organic light-emitting unit comprises an anode electrode, an organic light-emitting material layer and a cathode electrode which are sequentially positioned on one side of the substrate;
the touch control unit is positioned at one side of the organic light emitting unit far away from the substrate base plate, and comprises at least one layer of touch control electrode, wherein at least part of touch control electrodes are positioned between two adjacent independent organic light emitting units and are arranged on the same layer with the cathode electrode.
Further, the touch control unit comprises a self-contained touch control unit;
the self-contained touch control unit comprises a layer of touch control electrode, wherein the touch control electrode is positioned between two adjacent independent organic light emitting units and is arranged on the same layer as the cathode electrode.
Further, the touch control unit comprises a mutual capacitance type touch control unit;
the mutual capacitance type touch control unit comprises a touch control driving electrode and a touch control sensing electrode which are arranged in a layered mode, and the touch control driving electrode or the touch control sensing electrode and the cathode electrode are arranged in the same layer.
Further, the touch control unit comprises a mutual capacitance type touch control unit;
the mutual capacitance type touch control unit comprises a touch control driving electrode and a touch control sensing electrode which are arranged on the same layer, wherein the touch control driving electrode comprises a plurality of touch control driving electrode plates, and two adjacent touch control driving electrode plates are electrically connected through at least one touch control driving bridge; the touch sensing electrode comprises a plurality of touch sensing electrode plates, and two adjacent touch sensing electrode plates are electrically connected through at least one touch sensing bridge;
the touch driving bridge or the touch sensing bridge and the cathode electrode are arranged on the same layer.
Further, the touch driving electrode and the touch sensing electrode are arranged on the same layer as the cathode electrode.
Further, the display panel further comprises a thin film encapsulation layer positioned on one side of the cathode electrode away from the substrate;
the thin film encapsulation layer includes:
a first inorganic layer located on a side of the cathode electrode away from the substrate base plate;
an organic planarization layer located at a side of the first inorganic layer away from the substrate base plate and corresponding to the independent organic light emitting unit;
a second inorganic layer located on a side of the organic planarization layer away from the substrate base plate, the second inorganic layer covering the organic planarization layer and the first inorganic layer;
wherein the perpendicular projection of the first inorganic layer and the second inorganic layer on the substrate base plate covers the perpendicular projection of at least one independent organic light emitting unit on the substrate base plate.
Further, the display panel further includes a plurality of cathode wirings electrically connected to each other, each of the cathode wirings is electrically connected to each of the cathode electrodes, and is configured to transmit a cathode electrode signal to the cathode electrode.
In a second aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, where the method for manufacturing a display panel includes:
providing a substrate base plate;
preparing a plurality of independent organic light emitting units and touch control units on one side of the substrate; each independent organic light-emitting unit comprises an anode electrode, an organic light-emitting material layer and a cathode electrode which are sequentially positioned on one side of the substrate; the touch control unit comprises at least one layer of touch control electrode, and at least part of touch control electrodes are positioned between two adjacent independent organic light emitting units and are arranged on the same layer with the cathode electrode.
Further, preparing a plurality of independent organic light emitting units and touch control units on one side of the substrate base plate includes:
preparing a plurality of independently arranged anode electrodes on one side of the substrate;
preparing a plurality of independently arranged organic luminescent material layers on one side of the anode electrode far away from the substrate;
preparing a cathode metal layer arranged on one side of the organic luminescent material layer far away from the anode electrode;
and patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes.
Further, before patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of the touch electrodes between two adjacent cathode electrodes, the method further comprises:
preparing a thin film packaging layer on one side of the cathode metal layer, which is far away from the substrate, wherein the thin film packaging layer comprises a first inorganic layer which is positioned on one side of the cathode metal layer, which is far away from the substrate, and is entirely arranged; an organic planarization layer located at a side of the first inorganic layer away from the substrate base plate and corresponding to the independent organic light emitting unit; the second inorganic layer is positioned on one side of the organic flat layer away from the substrate base plate and is arranged on the whole layer, and the second inorganic layer covers the organic flat layer and the first inorganic layer;
patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes, wherein the patterning comprises the steps of;
patterning the second inorganic layer and the first inorganic layer;
and patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes.
In a third aspect, an embodiment of the present invention further provides a display apparatus, where the display apparatus includes the display panel of the first aspect.
According to the display panel provided by the embodiment of the invention, the plurality of independent organic light emitting units are arranged, each independent organic light emitting unit comprises the cathode electrode, at least part of the touch electrode is arranged between two adjacent independent organic light emitting units and is arranged in the same layer with the cathode electrode, and the arrangement of the cathode electrode and at least part of the touch electrode in the same layer ensures that the film layer arrangement relation of the display panel provided by the embodiment of the invention is simple, and is beneficial to realizing the light and thin display panel; meanwhile, each independent organic light emitting unit comprises an independently arranged cathode electrode, compared with the cathode electrode arranged on the whole layer in the prior art, the reflection of the cathode electrode to visible light can be reduced, and the display effect of the display panel is improved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel provided in the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a top view of a touch driving bridge or a touch sensing bridge and a cathode electrode arranged on the same layer in the display panel according to the embodiment of the invention;
fig. 4 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a display panel in the prior art, as shown in fig. 1, the display panel includes an OLED device 10, an insulating layer 20 and a touch electrode 30, the cathode layer 11 in the OLED device 10 is disposed on the whole layer, the touch electrode 30 is disposed on the cathode layer 11, meanwhile, the insulating layer 20 is disposed on the cathode layer 11 and the touch electrode 30, and more film layers are disposed to make the display panel thicker.
Based on the technical problems, an embodiment of the present invention provides a display panel, including a substrate base board; a plurality of independent organic light emitting units positioned at one side of the substrate, each independent organic light emitting unit comprising an anode electrode, an organic light emitting material layer and a cathode electrode which are positioned at one side of the substrate in sequence; the touch control unit is positioned on one side of the organic light emitting unit far away from the substrate base plate, and comprises at least one layer of touch control electrode, wherein at least part of touch control electrodes are positioned between two adjacent independent organic light emitting units and are arranged on the same layer with the cathode electrode. By adopting the technical scheme, the independent organic light-emitting units are arranged, each independent organic light-emitting unit comprises the independent cathode electrode, at least part of the touch electrode is arranged between two adjacent independent organic light-emitting units and is arranged in the same layer with the cathode electrode, and the arrangement of the cathode electrode and at least part of the touch electrode in the same layer ensures that the film layer arrangement relation of the display panel provided by the embodiment of the invention is simple and is beneficial to realizing the light and thin display panel; meanwhile, each independent organic light emitting unit comprises an independently arranged cathode electrode, compared with the cathode electrode arranged on the whole layer in the prior art, the reflection of the cathode electrode to visible light can be reduced, and the display effect of the display panel is improved.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, where the display panel includes: a substrate base 100; a plurality of individual organic light emitting units 200 positioned at one side of the substrate base 100, each individual organic light emitting unit 200 including an anode electrode (not shown), an organic light emitting material layer 201, and a cathode electrode 202 positioned at one side of the substrate base 100 in this order; the touch unit 300 is located at a side of the organic light emitting unit 200 away from the substrate 100, and the touch unit 300 includes at least one layer of touch electrode, at least a portion of the touch electrode is located between two adjacent independent organic light emitting units 200 and is disposed at the same layer as the cathode electrode 202.
It should be noted that, in order to clearly show the differences between the components of the display panel in the present embodiment and the components of the display panel in the background art, different reference numerals are used for the components of the display panel in the present embodiment and the components of the display panel in the background art, which are the same in name.
In this embodiment, the substrate 100 may be a rigid substrate or a flexible substrate, where the material of the rigid substrate may be glass, the material of the flexible substrate may be polyimide, and the thickness of the substrate 100 may be set according to the process requirement, the product requirement, and the like. The independent organic light emitting unit 200 includes an anode electrode (not shown), an organic light emitting material layer 201, and a cathode electrode 202, and the cathode electrode 202 may be independently disposed in only one sub-pixel or may be disposed in a plurality of sub-pixels instead of the entire layer, as compared with the prior art, and fig. 2 illustrates only that the cathode electrode 300 is disposed in one sub-pixel.
It should be noted that, when the touch unit 300 is a single layer of touch electrode, the touch electrodes may be all located between two adjacent independent organic light emitting units 200 and disposed in the same layer as the cathode electrode 202, or the bridging portion of the touch electrode is located between two adjacent independent organic light emitting units 200 and disposed in the same layer as the cathode electrode 202, but the touch electrode is located at a side of the organic light emitting units 200 away from the substrate 100, or the touch electrode is located between two adjacent independent organic light emitting units 200 and disposed in the same layer as the cathode electrode 202, but the bridging portion of the touch electrode is located at a side of the organic light emitting units 200 away from the substrate 100. When the touch unit 300 is a two-layer touch electrode, one layer of touch electrode is located on one side of the organic light emitting unit 200 away from the substrate 100, and the other layer of touch electrode is located between two adjacent independent organic light emitting units 200 and is arranged on the same layer as the cathode electrode 300. In summary, the touch unit 300 may be located on a side of the organic light emitting unit 200 away from the substrate 100, or may be located in a cathode layer of the organic light emitting unit 200. Fig. 2 illustrates that at least a portion of the touch electrode 400 is located between two adjacent independent organic light emitting units and is disposed in the same layer as the cathode electrode 202.
According to the display panel provided by the technical scheme of the embodiment, the plurality of independent organic light emitting units are arranged, each independent organic light emitting unit comprises the cathode electrode, at least part of the touch electrode is arranged between two adjacent independent organic light emitting units and is arranged on the same layer as the cathode electrode, and the cathode electrode and at least part of the touch electrode are arranged on the same layer, so that the film layer arrangement relation of the display panel provided by the embodiment of the invention is simple, the problem that the touch electrode is arranged on the cathode electrode in the prior art, meanwhile, an insulating layer is required to be arranged between the cathode electrode and the touch electrode, and the thicker display panel is caused by more film layer arrangement is solved, the realization of the light and thin display panel is facilitated, and meanwhile, each independent organic light emitting unit comprises the independently arranged cathode electrode.
Based on the above technical solution, the touch unit 300 may be a self-capacitance type touch unit or a mutual capacitance type touch unit; when the touch unit 300 is a mutual capacitive touch unit, the touch driving electrode and the touch sensing electrode may be located on the same film or may be located on different films. The different cases will be described in detail below.
Optionally, the touch unit 300 includes a self-contained touch unit; the self-contained touch unit includes a layer of touch electrode, which is located between two adjacent independent organic light emitting units and is arranged in the same layer as the cathode electrode 202.
When the touch unit 300 is a self-contained touch unit, the touch unit 300 includes a layer of touch electrodes, and the touch unit 300 is disposed between two adjacent independent organic light emitting units and is disposed on the same layer as the cathode electrode 202. The touch unit 300 is disposed between two independent organic light emitting units and is disposed on the same layer as the cathode electrode 202, thereby reducing the thickness of the display panel.
In this embodiment, the touch electrode serves as both a touch driving electrode and a touch sensing electrode. When in the touch stage, each touch electrode is sequentially input with a touch driving signal, and signals on each touch electrode are detected. When a touch event occurs, the touch electrodes are coupled with the capacitance of the human body, so that the capacitance of the touch electrodes is changed. And determining the capacitance variation of the touch electrode according to the received signals of the touch electrodes, and further determining the touch position.
Optionally, the touch unit 300 may include a mutual capacitive touch unit; the mutual capacitance type touch control unit comprises a touch control driving electrode and a touch control sensing electrode which are arranged in a layered mode, wherein the touch control driving electrode or the touch control sensing electrode and the cathode electrode are arranged in the same layer.
When the touch unit 300 is a mutual capacitive touch unit, the touch unit 300 includes a touch driving electrode and a touch sensing electrode, where the touch driving electrode and the touch sensing electrode are layered, and at this time, because one electrode, such as the touch driving electrode, is disposed on the same layer as the cathode electrode, and the other electrode, such as the touch sensing electrode, is disposed in other layers, compared with the touch driving electrode and the touch sensing electrode that are disposed in layers in the prior art, the thickness of the display panel is reduced.
In this embodiment, during the touch stage, each touch driving electrode is sequentially input with a touch driving signal, each touch sensing electrode outputs a detection signal, and when a touch event occurs, each touch driving electrode is coupled with each touch sensing electrode, thereby changing the capacitance between the touch driving electrode and the touch sensing electrode. And determining the change amount of the capacitance according to the detection signals output by the touch sensing electrodes, and further determining the touch position.
Optionally, the touch unit 300 may include a mutual capacitive touch unit, where the mutual capacitive touch unit includes a touch driving electrode and a touch sensing electrode that are disposed on the same layer, and fig. 3 is a top view of a touch driving bridge or a touch sensing bridge and a cathode electrode disposed on the same layer in the display panel according to an embodiment of the present invention, as shown in fig. 3, the touch driving electrode includes a plurality of touch driving electrode pieces 301, and two adjacent touch driving electrode pieces 301 are electrically connected through at least one touch driving bridge 302; the touch sensing electrode comprises a plurality of touch sensing electrode plates 303, and two adjacent touch sensing electrode plates are electrically connected through at least one touch sensing bridge 304, wherein the touch driving bridge 302 or the touch sensing bridge 304 is arranged on the same layer as the cathode electrode 202.
When the touch driving electrodes and the touch sensing electrodes are arranged in the same layer, the touch driving bridge 302 and the touch sensing bridge 304 have intersecting portions, and the intersecting portions of the touch driving bridge 302 and the touch sensing bridge 304 are shown by a dashed frame in fig. 3. If the touch driving bridge 302 and the touch sensing bridge 304 intersect, the touch effect will be affected, and at this time, the touch driving bridge 302 or the touch sensing bridge 304 needs to be disposed at a position different from the positions of the touch driving electrode and the touch sensing electrode, in this embodiment, the touch driving bridge 302 or the touch sensing bridge 304 is disposed at the same layer as the cathode electrode, and compared with the touch driving bridge 302 or the touch sensing bridge 304 disposed in other film layers, the thickness of the display panel can be reduced.
It should be noted that, two adjacent touch driving electrode plates 301 may be electrically connected through one touch driving bridge 302, or may be electrically connected through a plurality of touch driving bridges 302, when two adjacent touch driving electrode plates 301 are electrically connected through one touch driving bridge 302, the contact points between the touch driving bridge 302 and the two touch driving electrode plates 301 are two, when two adjacent touch driving electrode plates 301 are electrically connected through a plurality of touch driving bridges 302, the contact points between the touch driving bridge 302 and the two touch driving electrode plates 301 are greater than two, and the contact resistance is greater as the contact points are greater, in this embodiment, preferably, the two adjacent touch driving electrode plates 301 may be electrically connected through two touch driving bridges 302 (not shown in the drawing), wherein when one connection is disconnected, the electrical connection between the two adjacent touch driving electrode plates 301 is not affected, and meanwhile, the impedance between the touch driving electrode plates 301 and the touch driving bridge 302 may be reduced, so as to improve the touch sensitivity.
Alternatively, the touch driving electrode and the touch sensing electrode may be disposed in the same layer as the cathode electrode (not shown).
If the touch driving electrode and the touch sensing electrode are arranged on the same layer as the cathode electrode, at this time, the touch driving bridge or the touch sensing bridge needs to be arranged in other film layers different from the touch driving electrode and the touch sensing electrode. In this embodiment, the touch driving electrode and the touch sensing electrode are disposed on the same layer as the cathode electrode, and the touch driving bridge or the touch sensing bridge is disposed in other layers, so that the thickness of the display panel is reduced compared with the case that the touch driving electrode and the touch sensing electrode are disposed in other layers.
Based on the above technical solution, optionally, the display panel further includes a thin film encapsulation layer 400 located on a side of the cathode electrode 202 away from the substrate 100; the thin film encapsulation layer 400 includes: a first inorganic layer 401 located on a side of the cathode electrode 202 remote from the substrate 100; an organic planarization layer 402 located at a side of the first inorganic layer 401 remote from the substrate 100 and corresponding to the independent organic light emitting unit 200; a second inorganic layer 403 located on a side of the organic planarization layer 402 away from the substrate 100, the second inorganic layer 403 covering the organic planarization layer 502 and the first inorganic layer 401; wherein the perpendicular projection of the first inorganic layer 401 and the second inorganic layer 403 on the substrate 100 covers the perpendicular projection of the at least one individual organic light emitting unit 200 on the substrate 100.
The thin film encapsulation layer 400 may encapsulate one organic light emitting unit 200, or may encapsulate a plurality of organic light emitting units 200, with continued reference to fig. 2, fig. 2 illustrates that the thin film encapsulation layer 400 encapsulates only one individual organic light emitting unit 200. The thin film packaging layer in the display panel provided by the embodiment of the invention can ensure that the organic light-emitting unit is not influenced by moisture and oxygen because the inorganic layer has strong blocking capability, such as water blocking and oxygen blocking, and the service life of the organic light-emitting unit is prolonged. In this embodiment, when the thin film encapsulation layer includes one organic layer and two inorganic layers, moisture and oxygen can be further prevented from entering the organic light emitting element, so that the service life of the organic light emitting unit is improved, and the encapsulation reliability is ensured.
On the basis of the above technical solution, optionally, the display panel further includes a plurality of cathode wires electrically connected to each other, each cathode wire being electrically connected to each cathode electrode, for transmitting a cathode electrode signal to the cathode electrode.
For example, since the display panel provided by the embodiment of the invention includes a plurality of independently arranged cathode electrodes, in order to ensure that each cathode electrode can receive a cathode electrode signal, the display panel provided by the embodiment of the invention further includes a plurality of cathode wirings, and each cathode wiring is electrically connected with each cathode electrode and is used for transmitting the cathode electrode signal to the cathode electrode. Meanwhile, the cathode wires provided by the embodiment of the invention are electrically connected with each other, so that only one cathode wire is required to be electrically connected with the driving circuit, cathode electrode signals provided by the driving circuit are received, each cathode wire is not required to be electrically connected with the driving circuit, the cathode wire of the display panel is ensured to be simply arranged, and the pins of the driving circuit are simply arranged.
Based on the same inventive concept, the embodiment of the invention also provides a preparation method of the display panel, which can be used for preparing the display panel shown in fig. 2. Referring to fig. 4, the method includes:
s110, providing a substrate.
S120, preparing a plurality of independent organic light emitting units and touch control units on one side of a substrate; each independent organic light-emitting unit comprises an anode electrode, an organic light-emitting material layer and a cathode electrode which are sequentially positioned on one side of the substrate; the touch control unit comprises at least one layer of touch control electrode, and at least part of touch control electrode is positioned between two adjacent independent organic light emitting units and is arranged on the same layer with the cathode electrode.
The organic light-emitting layer and the cathode electrode can be formed on one side of the anode electrode away from the substrate by the processes of evaporation, sputtering and the like after the anode electrode is formed.
According to the preparation method of the display panel provided by the technical scheme of the embodiment, the plurality of independent organic light emitting units and the touch control unit are prepared on one side of the substrate, each independent organic light emitting unit comprises the cathode electrode, at least part of the touch control electrode is positioned between two adjacent independent organic light emitting units and is arranged on the same layer as the cathode electrode, and the film layer arrangement relation of the display panel provided by the embodiment of the invention is simple through the arrangement of the cathode electrode and at least part of the touch control electrode, so that the problem that the display panel is thicker due to the fact that the touch control electrode is arranged on the cathode electrode in the prior art is solved, meanwhile, an insulating layer is arranged between the cathode electrode and the touch control electrode, the thinning of the display panel is facilitated, and meanwhile, each independent organic light emitting unit comprises the cathode electrode which is independently arranged.
On the basis of the above technical solution, optionally, preparing a plurality of independent organic light emitting units and touch control units on one side of the substrate includes: preparing a plurality of anode electrodes which are independently arranged on one side of a substrate; preparing a plurality of independently arranged organic luminescent material layers on one side of the anode electrode away from the substrate; preparing a cathode metal layer arranged on one side of the organic luminescent material layer far away from the anode electrode; and patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes.
After preparing a plurality of independently arranged anode electrodes and a plurality of independently arranged organic luminescent material layers on one side of a substrate, preparing a cathode metal layer which is arranged on the whole layer on one side of the organic luminescent material layer away from the anode electrodes, and then carrying out patterning treatment on the cathode metal layer through processes such as etching and the like, thereby obtaining a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes.
On the basis of the above technical solution, optionally, before patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of the touch electrode between two adjacent cathode electrodes, the method further includes: preparing a thin film packaging layer on one side of the cathode metal layer, which is far away from the substrate, wherein the thin film packaging layer comprises a first inorganic layer which is positioned on one side of the cathode metal layer, which is far away from the substrate, and the whole layer is provided with the first inorganic layer; an organic flat layer located at one side of the first inorganic layer away from the substrate and corresponding to the independent organic light emitting unit; the second inorganic layer is positioned on one side of the organic flat layer far away from the substrate and is arranged in a whole layer, and the second inorganic layer covers the organic flat layer and the first inorganic layer; patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes, wherein the patterning comprises the steps of; patterning the second inorganic layer and the first inorganic layer; the cathode metal layer is patterned to obtain a plurality of cathode electrodes and at least a portion of the touch electrode between two adjacent cathode electrodes 202.
Wherein, the inorganic layer in the film encapsulation layer can be formed through film forming deposition or vapor deposition process, and the inorganic layer can comprise a deposition layer formed by one material of metal oxide and metal nitride or a deposition layer formed by a plurality of materials. More specifically, the inorganic layer may include SiNx, al 2 O 3 、SiO 2 And TiO 2 A deposited layer formed of one material or a deposited layer formed of a plurality of materials. In this embodiment, a first inorganic layer is prepared on a side of the cathode metal layer away from the substrate, then an organic planarization layer is prepared, for example, by an inkjet printing process, the organic planarization layer is located on a side of the first inorganic layer away from the substrate and corresponds to an independent organic light emitting unit, and then an inorganic layer, that is, a second inorganic layer, is prepared. The second inorganic layer and the first inorganic layer may be etched to expose the cathode metal layer, for example, by an etching process, and then the cathode metal layer may be etched, for example, by an etching process, to obtain a plurality of cathode electrodes and at least a portion of the touch electrode located between two adjacent cathode electrodes. It should be noted that, as will be understood by those skilled in the art, the process of patterning the second inorganic layer, the first inorganic layer and the cathode metal layer includes, but is not limited to, etching process, and those skilled in the art can choose the patterning process according to the product requirement, and the invention is not limited in particular.
The embodiment of the invention also provides a display device, and fig. 5 is a schematic structural diagram of the display device provided by the embodiment of the invention. Referring to fig. 5, the display device 1000 includes a display panel 1 provided in an embodiment of the present invention. The display device 1000 may be a mobile phone, a computer, an intelligent wearable device, etc.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. 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, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. A display panel, comprising:
a substrate base;
the organic light-emitting device comprises a substrate, a plurality of independent organic light-emitting units and a light-emitting unit, wherein the independent organic light-emitting units are positioned on one side of the substrate, and each independent organic light-emitting unit comprises an anode electrode, an organic light-emitting material layer and an independently arranged cathode electrode which are sequentially positioned on one side of the substrate;
the touch control unit is positioned at one side of the organic light emitting units far away from the substrate base plate, the touch control unit comprises at least one layer of touch control electrode, at least part of touch control electrodes are positioned between two adjacent independent organic light emitting units and are arranged on the same layer with the cathode electrodes, the display panel also comprises a plurality of cathode wires which are electrically connected with each other, and each cathode wire is electrically connected with each cathode electrode and is used for transmitting cathode electrode signals to the cathode electrodes;
the touch control unit comprises a mutual capacitance type touch control unit;
the mutual capacitance type touch control unit comprises a touch control driving electrode and a touch control sensing electrode which are arranged on the same layer, wherein the touch control driving electrode comprises a plurality of touch control driving electrode plates, and two adjacent touch control driving electrode plates are electrically connected through at least two touch control driving frame bridges; the touch sensing electrode comprises a plurality of touch sensing electrode plates, and two adjacent touch sensing electrode plates are electrically connected through at least two touch sensing bridges;
the touch driving bridge or the touch sensing bridge and the cathode electrode are arranged on the same layer.
2. The display panel of claim 1, wherein the touch driving electrode and the touch sensing electrode are disposed on the same layer as the cathode electrode.
3. The display panel of claim 1, further comprising a thin film encapsulation layer on a side of the cathode electrode remote from the substrate;
the thin film encapsulation layer includes:
a first inorganic layer located on a side of the cathode electrode away from the substrate base plate;
an organic planarization layer located at a side of the first inorganic layer away from the substrate base plate and corresponding to the independent organic light emitting unit;
a second inorganic layer located on a side of the organic planarization layer away from the substrate base plate, the second inorganic layer covering the organic planarization layer and the first inorganic layer;
wherein the perpendicular projection of the first inorganic layer and the second inorganic layer on the substrate base plate covers the perpendicular projection of at least one independent organic light emitting unit on the substrate base plate.
4. A method for manufacturing a display panel, comprising:
providing a substrate base plate;
preparing a plurality of independent organic light emitting units and touch control units on one side of the substrate; each independent organic light-emitting unit comprises an anode electrode, an organic light-emitting material layer and an independently arranged cathode electrode which are sequentially positioned on one side of the substrate; the touch control unit comprises at least one layer of touch control electrode, at least part of the touch control electrode is positioned between two adjacent independent organic light emitting units and is arranged on the same layer as the cathode electrode, the display panel further comprises a plurality of cathode wires which are electrically connected with each other, and each cathode wire is electrically connected with each cathode electrode and is used for transmitting a cathode electrode signal to the cathode electrode;
the touch control unit comprises a mutual capacitance type touch control unit;
the mutual capacitance type touch control unit comprises a touch control driving electrode and a touch control sensing electrode which are arranged on the same layer, wherein the touch control driving electrode comprises a plurality of touch control driving electrode plates, and two adjacent touch control driving electrode plates are electrically connected through at least two touch control driving frame bridges; the touch sensing electrode comprises a plurality of touch sensing electrode plates, and two adjacent touch sensing electrode plates are electrically connected through at least two touch sensing bridges;
the touch driving bridge or the touch sensing bridge and the cathode electrode are arranged on the same layer.
5. The method of manufacturing a display panel according to claim 4, wherein manufacturing a plurality of independent organic light emitting units and touch units on one side of the substrate base plate comprises:
preparing a plurality of independently arranged anode electrodes on one side of the substrate;
preparing a plurality of independently arranged organic luminescent material layers on one side of the anode electrode far away from the substrate;
preparing a cathode metal layer arranged on one side of the organic luminescent material layer far away from the anode electrode;
and patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes.
6. The method of claim 5, wherein patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least a portion of the touch electrode between two adjacent cathode electrodes, further comprises:
preparing a thin film packaging layer on one side of the cathode metal layer, which is far away from the substrate, wherein the thin film packaging layer comprises a first inorganic layer which is positioned on one side of the cathode metal layer, which is far away from the substrate, and is arranged in a whole layer; an organic planarization layer located at a side of the first inorganic layer away from the substrate base plate and corresponding to the independent organic light emitting unit; the second inorganic layer is positioned on one side of the organic flat layer away from the substrate base plate and is arranged on the whole layer, and the second inorganic layer covers the organic flat layer and the first inorganic layer;
patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes, wherein the patterning comprises the steps of;
patterning the second inorganic layer and the first inorganic layer;
and patterning the cathode metal layer to obtain a plurality of cathode electrodes and at least part of touch electrodes positioned between two adjacent cathode electrodes.
7. A display device comprising the display panel of any one of claims 1-3.
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| CN114115573A (en) * | 2020-08-26 | 2022-03-01 | 深圳市柔宇科技股份有限公司 | Touch display panel and electronic equipment |
| CN114115571A (en) * | 2020-08-26 | 2022-03-01 | 深圳市柔宇科技股份有限公司 | Touch display panel and electronic equipment |
| CN111930262A (en) * | 2020-09-11 | 2020-11-13 | 合肥维信诺科技有限公司 | Touch display panel |
| CN111930264B (en) * | 2020-09-15 | 2023-12-01 | 武汉华星光电半导体显示技术有限公司 | Touch display panel and touch display device |
| CN112925437B (en) * | 2021-01-28 | 2024-03-22 | 厦门天马微电子有限公司 | Display panel and display device |
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