CN223022665U

CN223022665U - Display panel and display device

Info

Publication number: CN223022665U
Application number: CN202422278990.7U
Authority: CN
Inventors: 郑美珠; 李园园; 薄赜文
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2024-09-18
Filing date: 2024-09-18
Publication date: 2025-06-24
Anticipated expiration: 2034-09-18

Abstract

The present disclosure relates to the field of display technology, and specifically provides a display panel and a display device. The display panel of the present disclosure has a display area. The display panel of the present disclosure includes: a base substrate, a display structure layer located on one side of the base substrate, and at least one pressure touch electrode group. Among them, the display structure layer is located in the display area. The pressure touch electrode group is located in the display area, and each pressure touch electrode group includes at least two pressure touch electrodes, and the pressure touch electrodes are arranged in the same layer as part of the film layer in the display structure layer. After forming a Wheatstone bridge between each pressure touch electrode in the same pressure touch electrode group, they are electrically connected to a pressure detection circuit; the pressure detection circuit is used to detect the pressure applied to the display panel. The embodiment of the present disclosure enables the pressure touch electrode to be arranged in the same layer as part of the film layer in the display structure layer, which can simplify the preparation process of the display panel, reduce the thickness of the display panel, and reduce the preparation cost.

Description

Display panel and display device

Technical Field

The disclosure relates to the technical field of display, in particular to a display panel and a display device.

Background

With the rapid development of electronic technology, electronic display devices are increasingly used. The touch display device is used as a novel display device, and has the advantages of more humanized use mode, better response, more sensitive appearance, more design sense and the like, so that the touch display device is widely applied to various fields of life production.

Disclosure of Invention

The present disclosure aims to solve at least one of the technical problems in the prior art, and proposes a display panel and a display device.

In order to achieve the above object, the present disclosure provides a display panel having a display area, the display panel comprising:

a substrate base;

the display structure layer is positioned at one side of the substrate base plate and is positioned in the display area;

The pressure touch electrode group comprises at least two pressure touch electrodes, and the pressure touch electrodes and part of film layers in the display structure layer are arranged in the same layer;

and a Wheatstone bridge is formed between the pressure touch electrodes in the same pressure touch electrode group.

In some embodiments, the display structure layer comprises a driving circuit layer and a light emitting device positioned on one side of the driving circuit layer away from the substrate base plate, wherein the light emitting device comprises a first electrode and a second electrode, the second electrode is electrically connected with the driving circuit layer, and the first electrode is positioned on one side of the second electrode away from the substrate base plate;

The pressure touch electrode and the first electrode are arranged on the same layer, or the pressure touch electrode and the second electrode are arranged on the same layer and are insulated from each other.

In some embodiments, the pressure touch electrode and the first electrode are arranged on the same layer, and orthographic projection of the pressure touch electrode and the first electrode on the substrate base plate is not overlapped.

In some embodiments, the pressure touch electrode and the first electrode are arranged on the same layer, and the pressure touch electrode and the first electrode are of an integral structure, and the integral structure is used for receiving display driving signals in a display stage and receiving touch driving signals in a touch stage.

In some embodiments, the pressure touch electrodes extend along a first direction, a plurality of pressure touch electrodes in the same pressure touch electrode group are arranged along a second direction, and the second direction intersects the first direction.

In some embodiments, the pressure touch electrode comprises a plurality of pressure touch units which are arranged along the first direction and are electrically connected in sequence, and the pressure touch units are in a zigzag shape.

In some embodiments, the display area comprises a plurality of pixel areas, wherein the plurality of pixel areas are arranged in a plurality of rows and a plurality of columns, and the pixel areas are not overlapped with the orthographic projection of the pressure touch electrode on the substrate;

The pressure touch unit comprises a plurality of first wires extending along the row direction of the pixel area and a plurality of second wires extending along the column direction of the pixel area, and the plurality of second wires are arranged along the row direction; or the pressure touch unit comprises a plurality of first wires extending along the column direction of the pixel area arrangement and a plurality of second wires extending along the row direction of the pixel area, and the plurality of second wires are arranged along the column direction;

Two adjacent second wires are connected through the first wire, and two adjacent second wires are respectively connected with two ends of the same first wire.

In some embodiments, adjacent two of the second wires have at least one orthographic projection of the pixel region on the substrate between orthographic projections on the substrate.

In some embodiments, the pressure detection circuit comprises a signal collector and a power supply, wherein the pressure touch electrode group comprises two pressure touch electrodes, and the two pressure touch electrodes in the same pressure touch electrode group are a first pressure touch electrode and a second pressure touch electrode;

The first end of the first pressure touch electrode is electrically connected with the first end of the signal collector and the first end of the power supply respectively;

the first end of the second pressure touch electrode is electrically connected with the second end of the signal collector and the second end of the power supply respectively;

The second end of the first pressure touch electrode is electrically connected with the first end of the second pressure touch electrode through a first resistor;

The second end of the second pressure touch electrode is electrically connected with the first end of the first pressure touch electrode through a second resistor.

The present disclosure also provides a display device comprising a display panel as claimed in any one of the above.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic cross-sectional view of a display panel according to some embodiments;

FIG. 2 is a schematic cross-sectional view of a display panel according to some embodiments of the present disclosure;

FIG. 3A is a schematic plan view of a display panel according to some embodiments of the present disclosure;

FIG. 3B is a schematic plan view of the pressure touch electrode in the embodiment shown in FIG. 3A;

FIG. 3C is a schematic plan view of the first electrode in the embodiment shown in FIG. 3A;

FIG. 4 is a schematic plan view of a display panel according to other embodiments of the present disclosure;

FIG. 5 is a circuit connection block diagram of two pressure touch electrodes and a pressure detection circuit that form a Wheatstone bridge in some embodiments of the present disclosure;

FIG. 6A is a schematic cross-sectional view of a display area of a display panel according to some embodiments of the present disclosure;

FIG. 6B is a schematic cross-sectional view of a display area of a display panel according to other embodiments of the present disclosure;

FIG. 6C is a schematic cross-sectional view of a display area of a display panel according to still other embodiments of the present disclosure;

FIG. 7 is a schematic diagram of a pressure touch electrode in some embodiments of the present disclosure;

FIG. 8 is a schematic diagram of a pressure touch electrode in other embodiments of the present disclosure;

FIG. 9 is a partial plan view of a display panel in a display area in some embodiments of the present disclosure;

FIG. 10 is a partial plan view of a display panel in a display area according to other embodiments of the present disclosure;

FIG. 11 is a partial plan view of a display panel in a display area according to still other embodiments of the present disclosure;

Fig. 12 is a partial plan view of a display panel in a display area according to still other embodiments of the present disclosure.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used in embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

As used herein, "parallel", "perpendicular" includes the stated case as well as cases similar to the stated case, the range of which is within an acceptable deviation range as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the range of acceptable deviation of approximately parallel may be, for example, within 5 ° of deviation, and "perpendicular" includes absolute perpendicular and approximately perpendicular, where the range of acceptable deviation of approximately perpendicular may also be, for example, within 5 ° of deviation.

It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present between the layer or element and the other layer or substrate.

Exemplary embodiments are described herein with reference to cross-sectional and/or plan views as idealized exemplary figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Thus, variations from the shape of the drawings due to, for example, manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of example embodiments.

The touch display device is a mainstream information interaction device in electronic equipment with the simple and direct operation characteristics. Touch display devices can be classified into resistive, capacitive, infrared, ultrasonic, etc. according to the principle of sensing pressure, wherein capacitive touch display devices have the advantages of dust prevention, scratch prevention, and high resolution, and gradually penetrate into the aspects of people's life, and as society and technology continue to advance, various demands of users on touch display devices are also continuously increasing.

Fig. 1 is a schematic cross-sectional view of a display panel according to some embodiments. In the related art, as shown in fig. 1, the display panel includes a substrate 1, a display structure layer 2 located on one side of the substrate 1, an encapsulation layer 3 located on one side of the display structure layer 2 away from the substrate 1, and a touch structure layer 4 located on one side of the encapsulation layer 3 away from the substrate 1. Optionally, the display panel further includes an insulating layer 5, a polarizing layer 6, an optical adhesive (OCA, optically CLEAR ADHESIVE) 7, and a cover layer 8, which are disposed on a side of the touch structure layer 4 away from the substrate 1 and sequentially along a direction away from the substrate 1. It is apparent from fig. 1 that the touch structure layer 4 is a film layer designed separately, and is located on two sides of the encapsulation layer 3 with the display structure layer 2. In other embodiments, the touch structure layer 4 includes a capacitive touch film layer and a pressure touch layer, and the capacitive touch film layer and the pressure touch layer are also separately designed structures and are respectively located on different film layers. For example, the capacitive touch film layer is located on a side of the encapsulation layer 3 away from the substrate 1, and is used for detecting a touch position of the display panel. The pressure touch control layer is positioned between the packaging layer 3 and the substrate 1 and is used for detecting the touch control pressure of the display panel. Therefore, the display panel with the touch function has thicker overall thickness, more complex preparation process flow and higher cost. In addition, the conductive layer in the display structure layer 2, for example, the first electrode and the second electrode including the light emitting device, may also interfere with the signal of the capacitive touch film layer, resulting in inaccurate touch detection.

In order to at least alleviate or solve one of the above-mentioned technical problems, the present disclosure provides a display panel and a display device.

Fig. 2 is a schematic cross-sectional structure of a display panel 100 according to some embodiments of the present disclosure. Fig. 3A is a schematic plan view of a display panel 100 according to some embodiments of the present disclosure. Fig. 3B is a schematic plan view of the pressure touch electrode 20 in the embodiment shown in fig. 3A. Fig. 3C is a schematic plan view of the first electrode 223 in the embodiment shown in fig. 3A. Fig. 4 is a schematic plan view of a display panel 100 according to other embodiments of the present disclosure.

In some embodiments, as shown in fig. 2, 3A, 3B and 4, a display panel 100 provided by the present disclosure has a display area AA and a non-display area NA located at least one side of the display area AA. For example, in the embodiment shown in fig. 2, 3A, 3B and 4, the non-display area NA surrounds the display area AA.

The display panel 100 in the embodiment of the present disclosure includes a substrate base 1, a display structure layer 2, and at least one pressure touch electrode group 10. The display structure layer 2 is located on one side of the substrate 1, and the display structure layer 2 is located in the display area AA. The pressure-touch electrode sets 10 are located in the display area AA and each pressure-touch electrode set 10 includes at least two pressure-touch electrodes 20, for example, in the embodiment shown in fig. 3A, 3B and 4, each pressure-touch electrode set 10 includes two pressure-touch electrodes 20. The pressure touch electrode 20 and a part of the film layers in the display structure layer 2 are arranged in the same layer. The "same layer arrangement" in the embodiment of the present disclosure means that the plurality of structures are formed by the same material layer through the same patterning process, that is, in the embodiment of the present disclosure, the pressure touch electrode 20 and one of the film structures in the display structure layer 2 are formed by the same material layer through the same patterning process.

Alternatively, the number of the pressure touch electrode sets 10 may be set according to practical application requirements, which is not limited in the embodiments of the present disclosure.

Alternatively, parameters such as the length and shape of each pressure touch electrode 20 may be set according to practical application requirements, which is not limited in the embodiments of the present disclosure.

The pressure touch electrodes 20 in the same pressure touch electrode group 10 are electrically connected with a pressure detection circuit after forming a wheatstone bridge. The pressure detection circuit is used for detecting the pressure applied to the display panel 100. For example, two pressure touch electrodes 20 in the same pressure touch electrode set 10 are electrically connected to the pressure detection circuit after forming a wheatstone bridge. Alternatively, after a wheatstone bridge is formed between two pressure touch electrodes 20 in the same pressure touch electrode set 10, the pressure touch electrodes may be electrically connected to the pressure detection circuit through a penetrating wire of a different layer from the pressure touch electrodes 20.

In the embodiment of the disclosure, the pressure touch electrode 20 and a part of the film layers in the display structural layer 2 are arranged in the same layer, namely, the pressure touch electrode 20 does not occupy a layer of film layer alone, so that the display panel 100 in the embodiment of the disclosure has a simpler structure and can effectively reduce the thickness. In addition, the manufacturing process of the display panel 100 can also be reduced by one manufacturing process, and thus, the embodiments of the present disclosure can simplify the process and reduce the cost. In addition, the pressure touch electrode 20 and a part of the film layers in the display structure layer 2 are arranged in the same layer, so that the problems that signals of the pressure touch electrode 20 are disturbed due to the fact that capacitance is generated between the conductive layer in the display structure layer 2 and the pressure touch electrode 20 and the like can be solved.

Meanwhile, in the embodiment of the present disclosure, the pressure touch electrodes 20 in the same pressure touch electrode set 10 are electrically connected to the pressure detection circuit after forming a wheatstone bridge, and at this time, the pressure detection circuit may detect the magnitude of the external force acting on the display panel and the position acted by the external force through the wheatstone bridge, so as to realize the detection of the pressure applied to the display panel.

Alternatively, the substrate base 1 may be a flexible base or a rigid base. In one example, the substrate 1 may include a flexible base including a first flexible material layer, a first inorganic material layer, a semiconductor layer, a second flexible material layer, and a second inorganic material layer stacked in this order. The materials of the first flexible material layer and the second flexible material layer can comprise one or more of Polyimide (PI), polyethylene terephthalate (PET), a polymer soft film subjected to surface treatment and the like. The materials of the first and second inorganic material layers may each include one or more of silicon nitride (SiNx), silicon oxide (SiOx), and the like for improving the water-oxygen resistance of the substrate. The material of the semiconductor layer may include amorphous silicon (a-si).

Fig. 5 is a circuit connection block diagram of two pressure touch electrodes 20 and a pressure detection circuit that form a wheatstone bridge in some embodiments of the present disclosure.

In some embodiments, as shown in fig. 5, the pressure detection circuit includes a signal collector 51 and a power supply 52. The signal collector 51 can measure the voltage change signal at two ends of the wheatstone bridge, so as to realize touch detection.

The two pressure-sensitive electrodes 20 forming the wheatstone bridge belong to the same pressure-sensitive electrode group 10. Specifically, as shown in fig. 2 and 5, two pressure touch electrodes 20 in the same pressure touch electrode set 10 are a first pressure touch electrode 201 and a second pressure touch electrode 202.

The first end a of the first pressure touch electrode 201 is electrically connected to the first end of the signal collector 51 and the first end of the power supply 52, respectively.

The first end C of the second pressure touch electrode 202 is electrically connected to the second end of the signal collector 51 and the second end of the power supply 52, respectively.

The second end D of the first pressure touch electrode 201 is electrically connected to the first end C of the second pressure touch electrode 202 through the first resistor R1. The first resistor R1 is a resistor with a fixed resistance value.

The second end B of the second pressure touch electrode 202 is electrically connected to the first end a of the first pressure touch electrode 201 through the second resistor R2. The second resistor R2 is a resistor with a fixed resistance value.

Alternatively, one of the first and second ends of the power supply 52 is positive and the other is negative. For example, in the embodiment shown in fig. 5, the first end of the power supply 52 is a positive electrode and the second end is a negative electrode. For another example, the power supply 52 has a negative electrode at a first end and a positive electrode at a second end.

Similarly, one of the first and second ends of the signal collector 51 is a positive electrode, and the other is a negative electrode. The first end of the signal collector 51 and the first end of the power supply 52 have the same positive and negative electrode properties.

In addition, the pressure touch electrode 20 has a corresponding resistance value. For example, in the embodiment shown in fig. 5, the resistance corresponding to the first pressure touch electrode 201 is equivalent to R3, and the resistance corresponding to the second pressure touch electrode 202 is equivalent to Rx.

In the embodiment of the disclosure, after the first end of the power supply 52 is electrically connected with the first end of the signal collector 51 and the second end of the power supply 52 is electrically connected with the second end of the signal collector 51, on one hand, the power supply 52 can ensure the normal operation of the signal collector 51, and on the other hand, the power supply 52 can also provide electrical signals for the first pressure touch electrode 201 and the second pressure touch electrode 202, so as to ensure the pressure detection of the signal collector 51 on the touch of the display panel.

Alternatively, the power supply 52 is a constant-potential power supply, i.e. is capable of providing a constant potential for the wheatstone bridge, and the magnitude of the constant potential may be set according to the actual application, which is not limited herein. The use of constant voltage driving in the disclosed embodiments can reduce signal interference between the pressure touch electrode 20 and the conductive layer in the display structure layer 4.

Alternatively, the power supply 52 can provide a constant current for the wheatstone bridge, and the magnitude of the constant current may be set according to the actual application, which is not limited herein. That is, the pressure touch electrode in the embodiment of the present disclosure adopts constant current driving, and the signal interference between the pressure touch electrode 20 and the conductive layer in the display structure layer 4 can be reduced by adopting constant current driving in the embodiment of the present disclosure.

Fig. 6A is a schematic cross-sectional view of a display panel 100 in a display area according to some embodiments of the present disclosure. Fig. 6B is a schematic cross-sectional view of the display panel 100 in the display area according to other embodiments of the disclosure. Fig. 6C is a schematic cross-sectional structure of the display panel 100 in a display area according to still other embodiments of the present disclosure. The display area AA includes a pixel area A1 and a spacing area A2 between the pixel areas A1.

In some embodiments, as shown in fig. 6A and 6B, the display structure layer 2 includes a driving circuit layer 21 and a light emitting device 22 located on a side of the driving circuit layer 21 away from the substrate 1. Wherein the light emitting device 22 includes a first electrode 223 and a second electrode 221, and a light emitting layer 222 between the first electrode 223 and the second electrode 221. Wherein the second electrode 221 is electrically connected to the driving circuit layer 21, and the first electrode 223 is located at a side of the second electrode 221 away from the substrate 1. The pressure touch electrode 20 is arranged in the same layer as the first electrode 223. That is, in the embodiment of the present disclosure, the pressure touch electrode 20 and the first electrode 221 are formed of the same material layer through the same patterning process, thereby simplifying the manufacturing process.

In other embodiments, as shown in fig. 6C, the pressure touch electrode 20 and the second electrode 221 are arranged in the same layer. That is, in the embodiment of the present disclosure, the pressure touch electrode 20 and the second electrode 221 are formed of the same material layer through the same patterning process, thereby simplifying the manufacturing process.

The pressure touch electrode 20 and the first electrode 223 are arranged in the same layer, or are arranged in the same layer as the second electrode 221, that is, the pressure touch electrode 20 does not occupy a layer of film layer alone, so that the structure film layer of the display panel 100 is simpler and the thickness of the display panel can be reduced effectively. In addition, the manufacturing process of the display panel 100 can also be reduced by one manufacturing process, and thus, the embodiments of the present disclosure can simplify the process and reduce the cost. In addition, the embodiments of the present disclosure can also reduce or avoid the problems of signal interference and the like of the pressure touch electrode 20, the first electrode 223, the second electrode 221 and the like caused by the capacitance and the like generated between the first electrode 223 and the second electrode 221 when the pressure touch electrode 20 is a single film layer.

Alternatively, the Light Emitting device 22 may be an Organic Light Emitting Diode (OLED). Among them, the organic light emitting diode OLED may emit, for example, red light, green light, blue light, or white light. The driving circuit layer 21 is electrically connected to the light emitting device 22 for providing a driving signal to the light emitting device 22.

Alternatively, the second electrode 221 may have a single-layer structure or a multi-layer structure stacked in the thickness direction of the display panel, and each layer structure may be made of a material such as a metal, a metal alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, or the like.

Alternatively, the light emitting layer 222 may include a small molecular organic material or a polymer molecular organic material, may be a fluorescent light emitting material or a phosphorescent light emitting material, may emit red light, green light, blue light, or may emit white light.

For example, the light emitting device 22 in the display structure layer 2 may further include other film layers. For example, the light emitting device 22 may further include a hole injection layer and a hole transport layer between the second electrode 221 and the light emitting layer 222, and an electron transport layer and an electron injection layer between the light emitting layer 222 and the first electrode 223. The hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer may each be a single-layer structure or a multi-layer structure stacked in the thickness direction of the display panel.

Alternatively, the first electrode 223 may be made of a metal, a metal alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, or the like.

Alternatively, the light emitting device 22 may employ a top emission type structure or a bottom emission type structure. When the top emission type structure is adopted, the second electrode 221 includes a conductive material having light reflection performance or includes a light reflection film, and the first electrode 223 includes a transparent or semitransparent conductive material. When the bottom emission type structure is adopted, the first electrode 223 includes a light reflective conductive material or includes a light reflective film, and the second electrode 221 includes a transparent or semitransparent conductive material.

Optionally, a plurality of light emitting devices 22 are included in the display structure layer 2. The first electrodes 223 of the respective light emitting devices 22 may be connected as a unit to form a first electrode layer. The first electrodes 223 of the respective light emitting devices 22 are integrally connected to facilitate the simplification of the process.

Alternatively, as shown in fig. 6A, 6B, and 6C, the driving circuit layer 21 includes a pixel circuit, which may include a plurality of thin film transistors and at least one storage capacitor. Only one of the thin film transistors 211 and one of the storage capacitors 215 are illustrated in the embodiment shown in fig. 6A and 6B.

As shown in fig. 6A, 6B, and 6C, the thin film transistor 211 includes an active layer 230, a gate electrode 220, and a source-drain electrode layer, wherein the source-drain electrode layer includes a drain electrode 210 and a source electrode 240. Wherein the gate 220 is located between the source-drain electrode layer and the active layer 212. In practice, the positional relationship of the active layer 230, the gate electrode 220, the drain electrode 210, and the source electrode 240 may be set according to actual conditions, which is not limited by the embodiments of the present disclosure. The second electrode 221 is electrically connected to one of the drain electrode 210 and the source electrode 240. For example, in the embodiment shown in fig. 6A and 6B, the second electrode 221 is electrically connected to the drain electrode 210.

As shown in fig. 6A, 6B, and 6C, the storage capacitor 215 includes a first plate 260 and a second plate 250 located on a side of the first plate 260 away from the substrate 1. Alternatively, the first electrode plate 260 may be disposed at the same layer as the gate electrode 220 of the thin film transistor 211, and the second electrode plate 250 may be disposed at the same layer as the source-drain electrode layer of the thin film transistor 211.

Alternatively, the active layer 31 includes a channel portion, and source and drain connection portions located at both sides of the channel portion, the drain connection portion being connected to the drain electrode 210 of the thin film transistor 211, and the source connection portion being connected to the source electrode 240 of the thin film transistor 211. The source connection portion and the drain connection portion may each be doped with an impurity (e.g., an N-type impurity or a P-type impurity) having a higher impurity concentration than the channel portion. The channel part is opposite to the gate 220 of the thin film transistor 211, and when the voltage signal applied to the gate 220 reaches a certain value, a carrier path is formed in the channel part, so that the drain 210 and the source 240 of the thin film transistor 211 are turned on.

Alternatively, as shown in fig. 6A, 6B, and 6C, the driving circuit layer 21 further includes a gate insulating layer 212 between the gate electrode 220 and the active layer 230, an interlayer dielectric layer 213 between the source and drain electrode layers and the gate electrode 220, and a passivation layer 214 and a planarization layer 216 between the second electrode 221 and the source and drain electrode layers. Wherein the passivation layer 214 is located between the planarization layer 216 and the source-drain electrode layer. Wherein the second electrode 221 is electrically connected to the drain electrode 210 through a via hole penetrating the passivation layer 214 and the planarization layer 216. The drain electrode 210 and the source electrode 240 are electrically connected to the active layer 230 through a via penetrating the interlayer dielectric layer 213, respectively.

Alternatively, the gate electrode 220, the drain electrode 210, and the source electrode 240 may each include a metal material, and may include any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo), for example. Also, the gate electrode 220, the drain electrode 210, and the source electrode 240 may have a single-layer structure or a multi-layer structure stacked in the thickness direction of the display panel, wherein each layer may include one or more of the foregoing metals. Alternatively, when the gate electrode 220, the drain electrode 210, or the source electrode 240 includes a plurality of metals, it may be an alloy material, such as aluminum neodymium (AlNd) or molybdenum niobium (MoNb), or may be a multi-layered stack structure, such as Ti/Al/Ti, or the like.

Alternatively, the active layer 230 may employ one or more of amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnON), indium Zinc Tin Oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, and polythiophene, etc.

Alternatively, the gate insulating layer 212 and the interlayer dielectric layer 213 may each have a single layer structure or a multi-layer structure stacked in the thickness direction of the display panel, and each layer may be made of any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON).

Alternatively, the material of the passivation layer 214 may include a compound of silicon, for example, including at least one of silicon oxide, silicon nitride, or silicon oxynitride.

Optionally, the planarization layer 216 is made of an organic insulating material, for example, the organic insulating material may include one or more of polyimide, epoxy, acryl, polyester, photoresist, polyacrylate, polyamide, silicone, and other resin materials. The organic insulating material may also have elasticity, for example, the organic insulating material may include one or more of urethane, thermoplastic Polyurethane (TPU), and other elastic materials.

Alternatively, as shown in fig. 6A, 6B, and 6C, the display structure layer 2 further includes a pixel defining layer 23 located on a side of the driving circuit layer 21 remote from the substrate base plate 1. The pixel defining layer 23 defines a pixel opening. At least part of the light emitting device 22 is located within the pixel opening. For example, in the embodiment shown in fig. 6A and 6B, the second electrode 221 is located in the pixel opening, the light emitting layer 222 is located in the pixel opening, a portion of the first electrode 223 is located in the pixel opening, and another portion of the first electrode 223 is located on a side of the pixel defining layer 23 away from the substrate 1.

Alternatively, the material of the pixel defining layer 23 may include one or more of polyimide, polyamide, acryl, benzocyclobutene, or phenol resin, etc. as an organic insulating material.

In the embodiment of the present disclosure, the pressure touch electrode 20 and the first electrode 223 are arranged in the same layer, so that the pressure touch electrode 20 can be prepared while the first electrode 223 of the light emitting device 22 is prepared, and therefore, the embodiment of the present disclosure can simplify the preparation process and reduce the preparation cost. In addition, the pressure detection circuit in the embodiment of the disclosure adopts constant current driving to ensure the stability of the signal of the pressure detection circuit, and can also reduce the signal interference between the first electrode 223 and the pressure touch electrode 20.

In some embodiments, as shown in fig. 6A, the pressure touch electrode 20 and the first electrode 223 are disposed in the same layer, and the orthographic projection of the pressure touch electrode 20 and the first electrode 223 on the substrate 1 does not overlap. That is, the pressure touch electrode 20 is electrically insulated from the first electrode 223. In this case, the first electrode 223 is not a continuous planar structure of the entire layer, but a patterned structure. The pressure touch electrode 20 is located in the spacer A2 and on a side of the pixel defining layer 23 away from the substrate 1, the first electrode 223 is located in the pixel area A1, and at least a portion of the first electrode 223 is located in the pixel opening.

In the embodiment of the disclosure, the pressure touch electrode 20 and the first electrode 223 can all work independently. For example, the pressure touch electrode 20 may be operated alone, the first electrode 223 may be operated alone, and the pressure touch electrode 20 and the first electrode 223 may be operated simultaneously.

For example, in the embodiment of fig. 3B and 4, the display area AA has an idle area in which the first electrode 223 is located in addition to the pressure touch electrode 20 shown. Of course, it can be clearly determined by those skilled in the art that the first electrode 223 and the pressure touch electrode 20 are prepared simultaneously, that is, are obtained in the same preparation process using the same mask.

In some embodiments, as shown in fig. 6B, the pressure touch electrode 20 and the first electrode 223 are disposed in the same layer, and the pressure touch electrode 20 and the first electrode 223 are integrally formed. The integrated structure is used for receiving a display driving signal in a display stage and receiving a touch driving signal in a touch stage. That is, in the touch stage, the integrated structure serves as the pressure touch electrode 20. In the display stage, the unitary structure serves as the first electrode 223.

In the embodiment of the disclosure, the pressure touch electrode 20 and the first electrode 223 are integrally configured, it is understood that the pressure touch electrode 20 and the first electrode 223 are the same electrode, and the electrode receives a display driving signal in a display stage so that the display panel can display a picture, and receives a touch driving signal in a touch stage so as to ensure a touch function of the display panel.

Or the pressure touch electrode 20 and the first electrode 223 in the embodiment of the present disclosure are in an integrated structure, it may also be understood that when the first electrode 223 of the light emitting device 22 is manufactured, the first electrode 223 is patterned so that the shape of the first electrode 223 meets the shape requirement of the pressure touch electrode 20 in the embodiment of the present disclosure, so that the first electrode 223 can also be used as the pressure touch electrode 20.

In the embodiment of the disclosure, the integrated structure receives the display driving signal in the display stage, and the display driving signal may be a cathode signal, that is, the display panel 100 has a picture display function at this time, and the integrated structure receives the touch driving signal in the touch stage, and the display panel 100 has a touch function at this time, so that the touch function and the display function of the display substrate 100 in the embodiment of the disclosure are independently completed in different stages, and therefore, the embodiment of the disclosure can further avoid the problems of short circuit and the like that may be caused when the pressure touch electrode 20 and the first electrode 223 are two electrodes electrically insulated, and the signal interference generated when the pressure touch electrode 20 and the first electrode 223 work simultaneously.

For example, the pressure touch electrode 20 shown in fig. 3A, 3B and 4 is also the first electrode 223, and receives a display driving signal in the display stage and a touch driving signal in the touch stage.

Specifically, the first electrode 223 may be prepared in a blank area other than the pressure-touch electrode 20 shown in fig. 3B. Fig. 3C illustrates a plan view structural diagram of the first electrode 223 prepared in the blank area of fig. 3B except for the pressure-sensitive electrode 20. The combination of fig. 3B and fig. 3C is the structure shown in fig. 3A. The pressure touch electrode 20 and the first electrode 223 in fig. 3A may be in an integral structure, or may be electrically insulated from each other, and may be selected according to actual needs, so as to meet the needs of different display devices.

In some embodiments, as shown in fig. 6C, the pressure touch electrode 20 and the second electrode 221 are disposed in the same layer, and the orthographic projections of the pressure touch electrode 20 and the second electrode 221 on the substrate 1 do not overlap. That is, the pressure touch electrode 20 is electrically insulated from the second electrode 221. Further, the pressure touch electrode 20 is located in the spacer A2, the second electrode 221 is located in the pixel area A1, and the pressure touch electrode 20 is located on a side of the pixel defining layer 23 close to the substrate 1.

In some embodiments, as shown in fig. 3A, 3B, and 4, the pressure-touch electrode 20 extends in a first direction. The plurality of pressure touch electrodes 20 in the pressure touch electrode group 10 are arranged along the second direction. The second direction intersects the first direction.

In fact, in the embodiment of the present disclosure, the pressure touch electrode 20 may have no extending direction or may have an extending direction, and the extending direction of the pressure touch electrode 20 may be arbitrary, and the extending directions of the different pressure touch electrodes 20 may be the same or different. The plurality of pressure touch electrode groups 10 may have no arrangement direction or may have an arrangement direction, and the arrangement direction of the plurality of pressure touch electrode groups 10 may be arbitrary. Whether the pressure touch electrodes 20 in the same pressure touch electrode set 10 are arranged along a certain direction or the arrangement direction can be selected according to actual needs. In the pressure-touch electrode sets 10, the arrangement directions of the pressure-touch electrodes 20 may be the same or different. The length of each pressure touch electrode 20 may be the same or different, and this is not limited in the embodiments of the present disclosure.

To simplify the manufacturing process and reduce the cost, the embodiments of the present disclosure extend the pressure touch electrodes 20 along the first direction, and arrange the pressure touch electrodes 20 in the same pressure touch electrode set 10 along the second direction. Wherein the second direction intersects the first direction.

Optionally, the first direction and the second direction are perpendicular.

Further alternatively, one of the first direction and the second direction may be an extending direction of the display panel 100, and the other is a direction perpendicular to the extending direction of the display panel. For example, in the embodiment shown in fig. 3A and 3B, the display panel 100 extends in the second direction, and at this time, the first direction is perpendicular to the extending direction of the display panel 100.

In fact, the first direction may be any direction. For example, in the embodiment shown in fig. 4, the included angle between the first direction and the extending direction of the display panel 100 is an acute angle.

Fig. 7 is a schematic structural diagram of a pressure touch electrode 20 according to some embodiments of the present disclosure. Fig. 8 is a schematic structural diagram of a pressure touch electrode 20 according to other embodiments of the present disclosure.

In some embodiments, as shown in fig. 3A, 3B, 4, 7 and 8, the pressure touch electrode 20 includes a plurality of pressure touch units 30 arranged along a first direction and electrically connected in sequence, wherein the pressure touch units 30 are in a folded line shape.

The embodiment of the disclosure sets the pressure touch unit 30 in a folded line shape, which can increase the area occupation ratio of the pressure touch unit 30 in the display area AA, so as to ensure the sensing capability and sensitivity of the pressure touch unit 30 to the pressure applied to each position of the display panel 100.

Optionally, the pressure touch unit 30 has a first connection end 31 and a second connection end 32.

Alternatively, the first connection end 31 and the second connection end 32 of the pressure touch unit 30 may be disposed on the same side of the corresponding pressure touch unit 30, and in this case, the schematic structural diagram of each pressure touch unit 30 may be as shown in fig. 7.

Alternatively, the first connection end 31 and the second connection end 32 of the pressure touch unit 30 may be disposed at different sides of the corresponding pressure touch unit 30. For example, the first connection end 31 and the second connection end 32 of the pressure touch unit 30 may be located at opposite sides of the pressure touch unit 30. At this time, the schematic structure of the pressure touch unit 30 may be as shown in fig. 8.

In the embodiment of the disclosure, the positions of the first connection end 31 and the second connection end 32 in each pressure touch unit 30 of the same pressure touch electrode 20 may be the same or different. For example, in the pressure touch electrode 20 shown in fig. 7, the first connection end 31 and the second connection end 32 of each pressure touch unit 30 are located on the same side of the corresponding pressure touch unit 30. For another example, in a certain pressure touch electrode 20, the first connection end 31 and the second connection end 32 of at least one pressure touch unit 30 are located on the same side of the corresponding pressure touch unit 30, and the first connection end 31 and the second connection end 32 of at least one pressure touch unit 30 are located on different sides of the corresponding pressure touch unit 30.

Fig. 9 is a partial plan view of a display panel in a display area according to some embodiments of the present disclosure. Fig. 10 is a schematic partial plan view of a display panel in a display area according to other embodiments of the present disclosure. Fig. 11 is a partial plan view of a display panel in a display area according to still other embodiments of the present disclosure. Fig. 12 is a partial plan view of a display panel in a display area according to still other embodiments of the present disclosure.

In some embodiments, as shown in fig. 9 to 12, the display area AA includes a plurality of pixel areas A1 and a spacing area A2 between the pixel areas A1. The color of the light emitted from the pixel area A1 may be red, blue, green, white, or the like, which is not limited herein. The orthographic projection of the pixel region A1 on the substrate 1 covers the orthographic projection of the pixel opening defined by the pixel defining layer 8 on the substrate 1. Wherein, the plurality of pixel areas A1 are arranged in a plurality of rows and columns. Moreover, the pixel area A1 and the orthographic projection of the pressure touch electrode 20 on the substrate 1 do not overlap. It is understood that the pixel area A1 does not overlap with the orthographic projection of the pressure touch unit 30 on the substrate 1. The orthographic projection of the spacer A2 on the substrate 1 covers the orthographic projection of the pressure touch electrode 20 on the substrate 1.

According to the embodiment of the disclosure, the orthographic projection of the pixel area A1 and the pressure touch electrode 20 on the substrate 1 is not overlapped, so that the light transmission effect of the display area AA can be ensured.

In some embodiments, as shown in fig. 9 and 10, the pressure touch unit 30 includes a plurality of first conductive lines 301 extending along a row direction in which the pixel areas A1 are arranged, and a plurality of second conductive lines 302 extending along a column direction in which the pixel areas A1 are arranged, wherein an arrangement direction of the plurality of second conductive lines 302 is a row direction in which the pixel areas A1 are arranged. Two adjacent second wires 302 are connected through a first wire 301, and two adjacent first wires 301 are respectively connected with two ends of the same second wire 302.

In some embodiments, as shown in fig. 11 and 12, the pressure touch unit 30 includes a plurality of first conductive lines 301 extending along a column direction in which the pixel areas A1 are arranged, and a plurality of second conductive lines 302 extending along a row direction in which the pixel areas A1 are arranged, wherein an arrangement direction of the plurality of second conductive lines 302 is a column direction in which the pixel areas A1 are arranged. Two adjacent second wires 302 are connected through a first wire 301, and two adjacent first wires 301 are respectively connected with two ends of the same second wire 302. Further, the arrangement direction of the plurality of second wires 302 is the column direction or the row direction of the arrangement of the pixel area A1, two adjacent second wires 302 are connected by the first wires 301, and two adjacent first wires 301 are respectively connected to two ends of the same second wire 302, so that the pixel area A1 can be avoided in the process of connecting the first wires 301 and the second wires 302, and the effect of the pressure touch electrode 20 on the light transmission of the display area AA is avoided.

In fact, in any of the embodiments of the present disclosure, the shape of each pressure touch electrode 20 and the shape of each pressure touch unit 30 can be set according to the actual needs of the user to adapt to the needs of different display panels 100. For example, in the embodiment shown in fig. 10, the pressure touch unit 30 has a comb shape as a whole. Wherein the second wire 302, the first wire 301 and the second wire 302, which are sequentially connected, form comb teeth of a comb shape. The arrangement direction of the plurality of comb teeth is the same as the arrangement direction of the plurality of second wires 302.

According to the embodiment of the disclosure, the structure of the pressure touch unit 30 can be simplified by setting the extending directions of the first wires 301 and the second wires 302 and the arrangement directions of the second wires 302, so that the arrangement of the pressure touch unit 30 in a display area is facilitated, the arrangement of the pressure touch electrodes 20 can be further simplified, the overall preparation difficulty is reduced, and the cost is reduced.

In some embodiments, as shown in fig. 9 to 12, adjacent two second wires 302 have at least one orthographic projection of the pixel area A1 on the substrate 1 between orthographic projections on the substrate 1.

The embodiment of the present disclosure has at least one orthographic projection of the pixel area A1 on the substrate 1 by making adjacent two second wires 302 have an orthographic projection on the substrate 1.

In some embodiments, as shown in fig. 2, the display panel 100 further includes an encapsulation layer 3 on a side of the display structure layer 2 away from the substrate 1. The encapsulation layer 3 covers the pixel defining layer 23 and the light emitting device 22 for encapsulating the light emitting device 22 to prevent moisture and/or oxygen in the external environment from corroding the light emitting device 22.

Optionally, the material of the encapsulation layer 3 is an insulating material.

Alternatively, as shown in fig. 6A and 6B, the encapsulation layer 3 includes a first sub-encapsulation layer 31, a second sub-encapsulation layer 32, and a third sub-encapsulation layer 33 that are positioned on a side of the light emitting device 22 away from the substrate 1 and are sequentially disposed in a direction away from the substrate 1.

In some embodiments, the materials of the first and third sub-encapsulation layers 31 and 33 may each include an inorganic material, and the material of the second sub-encapsulation layer 32 may include an organic material. Alternatively, the first and third sub-encapsulation layers 31 and 33 may be formed of at least one of high-density inorganic materials such as silicon oxynitride (SiON), silicon oxide (SiOx), silicon nitride (SiNx), etc. The second sub-packaging layer 32 may be made of a polymer material containing a desiccant and/or a moisture barrier. For example, the stress of the first sub-sealing layer 31 and the third sub-sealing layer 33 can be relieved by using a polymer resin, and a water absorbing material such as a desiccant can be included to absorb substances such as water and oxygen that intrude into the inside.

The present disclosure also provides a display device including a display panel 100 as in any of the embodiments of the present disclosure.

The principle of solving the problem of the display device according to the embodiments of the present disclosure is similar to that of the display panel 100 according to any of the embodiments of the present disclosure, and thus a detailed description thereof will not be provided. The display device in the embodiment of the disclosure has high integration level and is lighter and thinner.

It should be noted that the display panel and the display device in the embodiments of the present invention may further include other structures.

For example, as shown in fig. 2, the side of the encapsulation layer 3 away from the substrate 1 may also be provided with an insulating layer 5, a polarizing layer 6, an optical adhesive 7, and a cover layer 8 in this order in a direction away from the substrate.

Similar to the above other structures, the embodiments of the present disclosure will not be described in detail herein, and are not limited thereto.

In some embodiments of the present disclosure, two pressure touch electrodes form a wheatstone bridge, and thus touch detection may be achieved by detecting a signal of a voltage change across the wheatstone bridge. The power supply in the wheatstone bridge may be a power supply with adjustable output potential, and constant current is provided for the wheatstone bridge, that is, the wheatstone bridge is driven by constant current, so that even if the pressure touch electrode 20 and the first electrode 223 are different electrodes and work simultaneously, the touch detection process is not affected by noise of the display structure layer 2, for example, the pressure touch electrode 20 is not interfered by noise of the first electrode 223 in the display structure layer 2, thereby ensuring measurement accuracy.

In other embodiments of the present disclosure, the pressure touch electrode 20 and the first electrode 223 are in an integral structure, or the pressure touch electrode 20 and the second electrode 221 are in an integral structure, at this time, the integral structure receives the touch driving signal in the touch stage, and receives the display driving signal in the display stage, that is, the first electrode 223 and the pressure touch electrode 20 do not operate simultaneously, or the second electrode 221 and the pressure touch electrode 20 do not operate simultaneously, so the touch detection process does not generate noise interference to the display structural layer 2, and meanwhile, the first electrode 221 and the second electrode 223 in the display structural layer 2 also do not generate noise interference to the touch detection process during operation, thereby ensuring the measurement accuracy.

The display device in the embodiment of the disclosure may be an OLED display device, and may be specifically applied to display devices such as a tablet computer and a mobile phone.

The display device in the embodiments of the present disclosure may specifically include any apparatus or product having a display function. For example, the display device may be a smart phone, a mobile phone, an electronic book reader, a desktop computer (PC), a laptop PC, a netbook PC, a Personal Digital Assistant (PDA), a portable multimedia player MP), a digital audio player, a mobile medical device, a camera, a wearable device (e.g., a head-mounted device, an electronic apparel, an electronic bracelet, an electronic necklace, an electronic accessory, an electronic tattoo, or a smart watch), a television, or the like.

In some embodiments, the present disclosure further provides a method for manufacturing a display panel, including the steps of:

Step S10, providing the substrate 1.

In step S20, a display structure layer 2 and a pressure touch electrode group 10 located in a display area are formed on one side of the substrate 1. The pressure touch electrode set 10 includes at least two pressure touch electrodes 20, and a wheatstone bridge is formed between the two pressure touch electrodes 20 in the same pressure touch electrode set 10. And, the pressure touch electrode 20 is formed in synchronization with a part of the film layer in the display structure layer 2.

In some embodiments, the step of forming the display structure layer 2 includes:

Step S21, forming the driving circuit layer 21 in the display structure layer 2.

Step S22, forming the second electrode 221 of the light emitting device 22 on the side of the driving circuit layer 21 away from the substrate 1. Wherein the second electrode 221 is electrically connected to the driving circuit layer 21.

Step S23, forming a first electrode 223 on a side of the second electrode 221 away from the substrate 1.

The pressure touch electrode 20 is formed in synchronization with the first electrode 223 in step S23, or the pressure touch electrode 20 is formed in synchronization with the second electrode 221 in step S22.

The pressure touch electrode 20 is formed in the display structure layer 2 and is formed synchronously with the first electrode 223 or the second electrode 221, touch detection can be achieved under the condition that the thickness of the display panel is not increased, meanwhile, the preparation process can be simplified, and the preparation cost is reduced.

It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.

Claims

1. A display panel having a display area, characterized in that the display panel comprises:

a substrate base;

2. The display panel according to claim 1, wherein the display structure layer comprises a driving circuit layer and a light emitting device positioned on a side of the driving circuit layer away from the substrate, the light emitting device comprises a first electrode and a second electrode, the second electrode is electrically connected with the driving circuit layer, and the first electrode is positioned on a side of the second electrode away from the substrate;

The pressure touch electrode and the first electrode are arranged on the same layer, or the pressure touch electrode and the second electrode are arranged on the same layer and are insulated at intervals.

3. The display panel of claim 2, wherein the pressure touch electrode is co-layered with the first electrode, and wherein the pressure touch electrode does not overlap with the orthographic projection of the first electrode on the substrate.

4. The display panel of claim 2, wherein the pressure touch electrode and the first electrode are arranged in the same layer, and the pressure touch electrode and the first electrode are in an integrated structure, and the integrated structure is used for receiving display driving signals in a display stage and receiving touch driving signals in a touch stage.

5. The display panel of any one of claims 1 to 4, wherein the pressure touch electrodes extend along a first direction, wherein a plurality of the pressure touch electrodes in a same pressure touch electrode group are arranged along a second direction, and wherein the second direction intersects the first direction.

6. The display panel of claim 5, wherein the pressure touch electrode comprises a plurality of pressure touch units arranged along the first direction and electrically connected in sequence, and the pressure touch units are in a zigzag shape.

7. The display panel of claim 6, wherein the display area comprises a plurality of pixel regions, wherein the plurality of pixel regions are arranged in a plurality of rows and a plurality of columns, wherein the pixel regions do not overlap with an orthographic projection of the pressure touch electrode on the substrate base plate;

8. The display panel of claim 7, wherein adjacent two of the second conductors have at least one orthographic projection of the pixel region on the substrate between orthographic projections of the second conductors on the substrate.

9. The display panel according to any one of claims 1 to 4, wherein the pressure detection circuit comprises a signal collector and a power supply, the pressure touch electrode group comprises two pressure touch electrodes, and the two pressure touch electrodes in the same pressure touch electrode group are a first pressure touch electrode and a second pressure touch electrode;

10. A display device comprising the display panel according to any one of claims 1 to 9.