Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. In the display panel provided in the embodiment of the present application, a first touch electrode string and a portion of a second touch electrode string are arranged in the same layer and insulated from each other, so that the first touch electrode string and the second touch electrode string form a touch capacitor to detect two-dimensional coordinate information of a user's touch operation. Furthermore, the third touch electrode, the second touch electrode string, and the elastic insulating layer located therebetween jointly form a pressure sensing capacitor. Due to the good elasticity of the elastic insulating layer, the elastic insulating layer undergoes a certain degree of deformation when a user touches the touch, thereby enabling the pressure sensing capacitor to detect touch force information during the user's touch operation, thereby enabling the touch layer to detect three-dimensional touch information of the user's touch operation.

Description

Technical Field

[0001] The present application relates to the field of touch technology, and more specifically, to a display panel and a display device. Background Art

[0002] For display devices such as smartphones and tablet computers, touch interaction is an important interaction method. Currently, touch interaction of display devices is mostly achieved through touch sensors provided in the display devices.

[0003] However, existing touch sensors can only output the two-dimensional coordinates of the touch point, that is, they can only determine the touch point position in the direction parallel to the display panel. Currently, there is a lack of display panels on the market that can simultaneously determine the touch point position and touch force. Summary of the Invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a display panel and a display device to solve the technical problem in the prior art that the display panel cannot simultaneously determine the touch point and the touch force.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0006] a light-emitting functional layer;

[0007] A touch layer is provided on one side of the light-emitting functional layer;

[0008] The touch layer includes at least two first touch electrode strings, at least two second touch electrode strings, at least two third touch electrode strings and an elastic insulating layer. The first touch electrode strings and the third touch electrode strings extend along a first direction parallel to the light-emitting functional layer, the second touch electrode string extends along a second direction parallel to the light-emitting functional layer, and the first direction intersects with the second direction; the third touch electrode string is arranged on one side of the light-emitting functional layer, the elastic insulating layer is arranged on a side of the third touch electrode string away from the light-emitting functional layer, the first touch electrode string and part of the second touch electrode string are arranged in the same layer on a side of the elastic insulating layer away from the light-emitting functional layer, and the first touch electrode string and the second touch electrode string are insulated from each other; the orthographic projections of the third touch electrode string and the second touch electrode string on the light-emitting functional layer at least partially overlap.

[0009] Optionally, the second touch electrode string includes at least two electrically connected second touch electrodes, and the third touch electrode string includes at least two electrically connected third touch electrodes;

[0010] The orthographic projections of the third touch electrode and the second touch electrode on the light-emitting functional layer overlap, or the orthographic projection of the third touch electrode on the light-emitting functional layer is within the orthographic projection range of the second touch electrode on the light-emitting functional layer.

[0011] Optionally, the first touch electrode string includes at least two electrically connected first touch electrodes;

[0012] The first touch electrodes and the second touch electrodes are arranged in the same layer, and are alternately arranged along a plane parallel to the light-emitting functional layer.

[0013] Optionally, in the same first touch electrode string, any two adjacent first touch electrodes are connected via a first connection structure on the same layer;

[0014] In the same second touch electrode string, any two adjacent second touch electrodes are connected via a second connection structure, the second connection structure is provided on the same layer as the third touch electrode, and the second connection structure is connected to the second touch electrode via a via hole in the elastic insulating layer;

[0015] In the same third touch electrode string, any two adjacent third touch electrodes are connected via a third connection structure on the same layer.

[0016] Optionally, the orthographic projection of the first connection structure on the light-emitting functional layer partially overlaps with the orthographic projection of the second connection structure on the light-emitting functional layer.

[0017] Optionally, the elastic insulating layer is made of any one of silicone, acrylic and polyurethane.

[0018] Optionally, a vertical distance from a surface of the elastic insulating layer away from the third touch electrode to the third touch electrode is not less than 2 micrometers and not more than 10 micrometers.

[0019] Optionally, the touch layer further includes:

[0020] a first signal trace, one end of which is electrically connected to the first touch electrode string, and the other end of which is configured to be electrically connected to the control chip;

[0021] a second signal trace, one end of which is electrically connected to the second touch electrode string, and the other end of which is configured to be electrically connected to the control chip;

[0022] a third signal line, one end of which is electrically connected to the third touch electrode string, and the other end of which is configured to be electrically connected to the control chip;

[0023] The first signal line, the first touch electrode string and part of the second touch electrode string are arranged on the same layer; the second signal line and the third signal line are arranged on the same layer, and the orthographic projection of the first signal line on the third signal line covers part of the third signal line.

[0024] Optionally, the first touch electrode, the second touch electrode and the third touch electrode are all grid electrodes.

[0025] In a second aspect, an embodiment of the present application provides a display device, comprising: the display panel provided in the first aspect above.

[0026] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0027] In the display panel provided in the embodiment of the present application, the first touch electrode string and part of the second touch electrode string are arranged in the same layer and are insulated from each other, so that the first touch electrode string and the second touch electrode string form a touch capacitor to detect the planar two-dimensional coordinate information of the user's touch operation; moreover, the third touch electrode string, the second touch electrode string and the elastic insulating layer located therebetween jointly form a pressure sensing capacitor. Since the elastic insulating layer has good elasticity, when the user touches it, the elastic insulating layer will undergo a certain deformation, so that the pressure sensing capacitor can detect the touch force information in the user's touch operation, so that the touch layer can detect the three-dimensional touch information of the user's touch operation.

[0028] Moreover, in the display panel provided in the embodiment of the present application, the original conductive layer is used to set the third touch electrode string, so that the display panel can realize the detection of three-dimensional touch information without increasing the thickness and complexity of the film layer, which is beneficial to improving the lightness and thinness of the display panel, will not increase the complexity of the manufacturing process, and is convenient for mass production.

[0029] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0032] Figure 2 Provided in the embodiments of this application Figure 1 A schematic diagram of a first touch electrode string and a light-emitting functional layer in the display panel is shown;

[0033] Figure 3 Provided in the embodiments of this application Figure 1 A schematic diagram of a second touch electrode string and a light-emitting functional layer in the display panel shown;

[0034] Figure 4 Provided in the embodiments of this application Figure 1 Schematic diagram of the third touch electrode string and the light-emitting functional layer in the display panel;

[0035] Figure 5 Provided in the embodiments of this application Figure 1A schematic cross-sectional view of the display panel taken at AA is shown;

[0036] Figure 6 Provided in the embodiments of this application Figure 1 The cross-sectional view of the display panel at BB is shown;

[0037] Figure 7 Provided in the embodiments of this application Figure 1 A schematic cross-sectional view of the CC portion of the display panel is shown;

[0038] Figure 8 Provided in the embodiments of this application Figure 1 A schematic cross-sectional view of a display panel at position DD is shown;

[0039] Figure 9 A schematic diagram of a touch operation of a display panel provided in an embodiment of the present application;

[0040] Figure 10 A schematic structural diagram of a display device provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 100-substrate; 200-control chip;

[0043] 10-light-emitting functional layer; 20-touch layer;

[0044] 21 - first touch electrode string; 211 - first touch electrode; 212 - first connection structure;

[0045] 22 - second touch electrode string; 221 - second touch electrode; 222 - second connection structure;

[0046] 23 - third touch electrode string; 231 - third touch electrode; 232 - third connection structure;

[0047] 24- elastic insulating layer;

[0048] 30-buffer layer; 40-protective layer; 50-polarizing layer; 60-protective cover;

[0049] 71 - first signal routing; 72 - second signal routing; 73 - third signal routing. DETAILED DESCRIPTION

[0050] The following describes the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0051] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a," "an," "said," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of the described features, integers, steps, and / or operations, but does not exclude the implementation of other features, information, data, steps, operations, and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0052] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0053] First, the relevant technologies involved in this application are described:

[0054] Currently, touch interaction of display devices is mostly achieved through touch sensors set in the display devices. Related OLED (Organic Light-Emitting Diode) display panels mostly use FMLOC (Flexible-Multi Layer On Cell) technology to integrate touch sensors on the display panels.

[0055] Existing touch sensors can only output the two-dimensional coordinates of the touch point, that is, they can only judge the touch point position based on the information reported by the X&Y axes in the direction parallel to the display surface. Currently, there is a lack of display panels on the market that can simultaneously determine the touch point position and touch force.

[0056] With the development of touch applications, the demand for touch force feedback is increasing. However, current capacitive touch sensors have difficulty detecting touch pressure, necessitating the addition of pressure sensors to provide touch force feedback. However, current touch sensors are mostly flat capacitive structures arranged on a single layer, while pressure sensors are mostly stacked capacitive structures. Adding a pressure sensor directly to one side of the touch sensor would inevitably increase the thickness of the display panel. Furthermore, the two structures are difficult to be compatible, making manufacturing more difficult.

[0057] The display panel and display device provided in this application are aimed at solving the above technical problems in the prior art.

[0058] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0059] The embodiment of the present application provides a display panel, the structural diagram of which is shown in FIG. Figure 1 As shown, Figure 1 The cross-sectional diagrams of the display panel at AA, BB, CC and DD are shown as follows: Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The display panel includes: a light-emitting functional layer 10 and a touch control layer 20.

[0060] In the embodiment of the present application, the touch layer 20 is arranged on one side of the light-emitting functional layer 10, and the touch layer 20 includes at least two first touch electrode strings 21, at least two second touch electrode strings 22, at least two third touch electrode strings 23 and an elastic insulating layer 24. The first touch electrode strings 21 and the third touch electrode strings 23 extend along a first direction parallel to the light-emitting functional layer 10, and the second touch electrode string 22 extends along a second direction parallel to the light-emitting functional layer 10, and the first direction intersects with the second direction.

[0061] The third touch electrode string 23 is arranged on one side of the light-emitting functional layer 10, the elastic insulating layer 24 is arranged on the side of the third touch electrode string 23 away from the light-emitting functional layer 10, the first touch electrode string 21 and part of the second touch electrode string 22 are arranged in the same layer on the side of the elastic insulating layer 24 away from the light-emitting functional layer 10, and the first touch electrode string 21 and the second touch electrode string 22 are insulated from each other; the orthographic projections of the third touch electrode string 23 and the second touch electrode string 22 on the light-emitting functional layer 10 at least partially overlap.

[0062] In the display panel provided in the embodiment of the present application, the first touch electrode string 21 and part of the second touch electrode string 22 are arranged in the same layer and are insulated from each other, so that the first touch electrode string 21 and the second touch electrode string 22 form a touch capacitor to detect the planar two-dimensional coordinate information of the user's touch operation; moreover, the third touch electrode string 23, the second touch electrode string 22 and the elastic insulating layer 24 located therebetween jointly form a pressure sensing capacitor. Since the elastic insulating layer 24 has good elasticity, when the user touches, the elastic insulating layer 24 will undergo a certain deformation, so that the pressure sensing capacitor can detect the touch force information in the user's touch operation, so that the touch layer 20 can detect the three-dimensional touch information of the user's touch operation.

[0063] Moreover, in the display panel provided in the embodiment of the present application, the original conductive layer is used to set the third touch electrode string 23, so that the display panel can realize the detection of three-dimensional touch information without increasing the thickness and the complexity of the film layer, which is beneficial to improving the lightness and thinness of the display panel, does not increase the complexity of the manufacturing process, and facilitates mass production.

[0064] In the embodiment of this application, Figures 1-8 As shown, the touch layer 20 is disposed on one side of the light-emitting functional layer 10 . Optionally, the touch layer 20 is disposed on the light-emitting side of the light-emitting functional layer 10 . Optionally, the light-emitting functional layer 10 includes an OLED.

[0065] In the embodiment of the present application, the touch layer 20 includes a first touch electrode string 21, a second touch electrode string 22 and a third touch electrode string 23. Figure 1 、 Figure 2 and Figure 4 As shown, the first touch electrode series 21 and the third touch electrode series 23 extend along a first direction parallel to the light emitting functional layer 10, as shown in FIG. Figure 1 and Figure 3 As shown, the second touch electrode series 22 extends along a second direction parallel to the light-emitting functional layer 10 . Optionally, the first direction is perpendicular to the second direction.

[0066] In the embodiment of the present application, the first touch electrode string 21 and part of the second touch electrode string 22 are arranged in the same layer on the side of the elastic insulating layer 24 away from the light-emitting functional layer 10.

[0067] The second touch electrode strings 22 are insulated from each other, so that the first touch electrode strings 21 and the second touch electrode strings 22 form a touch capacitor to detect the two-dimensional coordinate information of the user's touch operation.

[0068] Optionally, in the embodiment of the present application, the first touch electrode string 21 is a receiving electrode of the touch capacitor, and the second touch electrode string 22 is a sending electrode of the touch capacitor. In the embodiment of the present application, along the direction perpendicular to the light-emitting functional layer 10, the third touch electrode string 23, the elastic insulating layer 24 and the second

[0069] The touch electrode strings 22 are stacked in sequence, and the orthographic projections of the third touch electrode string 23 and the second touch electrode string 22 on the light-emitting functional layer 10 at least partially overlap, that is, the third touch electrode string 23 and the second touch electrode string 22 are at least partially overlapped.

[0070] The electrode strings 22 are at least partially aligned, so that the third touch electrode string 23, the second touch electrode string 22 and the elastic insulating layer 24 between the two form a pressure sensing capacitor. When the user touches the touch screen, the elastic insulating layer 24 has good elasticity and the elastic insulating layer 24 will be deformed to a certain extent.

[0071] The deformation of the pressure sensing capacitor changes the capacitance value of the pressure sensing capacitor, and the touch force information of the user's touch operation can be detected by the pressure sensing capacitor, so that the touch layer 20 can

[0072] It can detect three-dimensional touch information of user touch operations.

[0073] In the embodiment of the present application, the touch layer 20 is disposed on one side of the light-emitting functional layer 10 , so that the display area of ​​the display panel can determine both the touch point and the touch force.

[0074] Optionally, in the embodiment of the present application, the touch layer 20 is integrated on one side of the light-emitting functional layer 10 using FMLOC technology. Optionally, an encapsulation layer is provided between the light-emitting functional layer 10 and the touch layer 20, that is, the touch layer 20 is provided on the side of the encapsulation layer away from the light-emitting functional layer 10 using FMLOC technology. Optionally, the encapsulation layer includes a stacked organic encapsulation layer and an inorganic encapsulation layer.

[0075] Optionally, in the embodiment of the present application, the third touch electrode string 23 is a receiving electrode of the pressure sensing capacitor, and the second touch electrode string 22 is a sending electrode of the pressure sensing capacitor.

[0076] Optionally, in the embodiment of the present application, the elastic insulating layer 24 is a TLD (Touch sensor panel Layer Dielectric, a dielectric layer of the touch sensor panel).

[0077] It should be noted that, since the third touch electrode string 23 is located below the second touch electrode string 22, the third touch electrode string 23 is not visible due to the shielding of the second touch electrode string 22. Figure 1 As shown, the blocked third touch electrode string 23 is represented by a dotted line, so that readers can intuitively understand the film layer arrangement relationship of the first touch electrode string 21, the second touch electrode string 22 and the third touch electrode string 23 in the display panel provided by the embodiment of the application.

[0078] It is understood in the art that in the display panel provided in the embodiment of the present application, the original conductive layer is used to set the third touch electrode string 23. The original conductive layer is the film layer where part of the second connection structure 222 is located, that is, the bridging layer for realizing the electrical connection between adjacent second touch electrodes 221.

[0079] Alternatively, as Figure 1 As shown, in one embodiment of the present application, the second touch electrode string 22 includes at least two electrically connected second touch electrodes 221 , and the third touch electrode string 23 includes at least two electrically connected third touch electrodes 231 .

[0080] In the embodiment of the present application, the second touch electrode string 22 includes a plurality of electrically connected second touch electrodes 221, such as Figure 1 As shown, a plurality of second touch electrodes 221 are sequentially connected to form a second touch electrode string 22 that is strip-shaped and extends parallel to the second direction.

[0081] In the embodiment of the present application, the third touch electrode string 23 includes a plurality of electrically connected third touch electrodes 231, such as Figure 1 and Figure 4 As shown, a plurality of third touch electrodes 231 are sequentially connected to form a strip-shaped third touch electrode string 23 extending parallel to the first direction.

[0082] Optionally, the third touch electrode 231 and the second touch electrode 221 overlap in the orthographic projection of the light-emitting functional layer 10, that is, the third touch electrode 231 and the second touch electrode 221 have the same shape and area, which can avoid the electric field information of the user's touch affecting the third touch electrode 231 during the user's touch operation, thereby reducing the influence of information other than touch force on the pressure sensing capacitor, and ensuring the accuracy of the pressure sensing capacitor in detecting touch force.

[0083] Alternatively, as Figure 1 As shown, the orthographic projection of the third touch electrode 231 on the light-emitting functional layer 10 is located within the orthographic projection range of the second touch electrode 221 on the light-emitting functional layer 10, that is, the area of ​​the third touch electrode 231 is smaller than the area of ​​the second touch electrode 221, thereby further reducing the influence of information other than touch force on the pressure sensing capacitor, and ensuring the accuracy of touch force detection by the pressure sensing capacitor.

[0084] Alternatively, as Figure 1 As shown, in one embodiment of the present application, the first touch electrode string 21 includes at least two electrically connected first touch electrodes 211; the first touch electrodes 211 and the second touch electrodes 221 are arranged in the same layer, and the first touch electrodes 211 and the second touch electrodes 221 are arranged alternately in a plane parallel to the light-emitting functional layer 10.

[0085] In the embodiment of the present application, the first touch electrode string 21 includes a plurality of electrically connected first touch electrodes 211, such as Figure 1 As shown, a plurality of first touch electrodes 211 are sequentially connected to form a first touch electrode string 21 that is strip-shaped and extends parallel to the first direction.

[0086] In the embodiment of this application, Figure 1 As shown, the first touch electrodes 211 and the second touch electrodes 221 are staggered and spaced in a plane parallel to the light-emitting functional layer 10, so that the touch capacitors formed by each first touch electrode 211 and each second touch electrode 221 are evenly arranged in a plane parallel to the light-emitting functional layer 10. Optionally, as shown in FIG. Figure 1 As shown, along a plane parallel to the light-emitting functional layer, a plurality of first touch electrodes 211 and a plurality of second touch electrodes 221 are alternately arranged in sequence.

[0087] Alternatively, as Figure 1As shown, each first touch electrode 211 is surrounded by four second touch electrodes 221, thereby ensuring that the touch layer 20 is more sensitive in detecting the user's touch operation during the user's touch operation, thereby increasing the processing speed of obtaining the two-dimensional coordinate information of the user's touch operation.

[0088] Alternatively, as Figures 1-8 As shown, in one embodiment of the present application, in the same first touch electrode string 21 , any two adjacent first touch electrodes 211 are connected via a first connection structure 212 on the same layer.

[0089] In the embodiment of this application, Figure 1 、 Figure 2 and Figure 5 As shown, the first touch electrode string 21 includes a plurality of first touch electrodes 211 and a plurality of first connection structures 212. The first connection structure 212 is used to connect two arbitrarily adjacent first touch electrodes 211 in the same first touch electrode string 21. Optionally, as Figure 2 As shown, the first connection structure 212 and the first touch electrode 211 are arranged in the same layer.

[0090] In the embodiment of this application, Figure 1 、 Figure 3 、 Figure 6 and Figure 7 As shown, the second touch electrode string 22 includes a plurality of second touch electrodes 221 and a plurality of second connection structures 222. The second connection structure 222 is used to connect two arbitrarily adjacent second touch electrodes 221 in the same second touch electrode string 22. Optionally, as Figure 3 As shown, the second connection structure 222 is provided in the same layer as the third touch electrode 231, and the second connection structure 222 is connected to the second touch electrode 221 through a via hole in the elastic insulating layer 24. That is, in the embodiment of the present application, the second connection structure 222 is a bridge structure, which electrically connects two adjacent second touch electrodes 221 in the second touch electrode string 22.

[0091] In the embodiment of this application, Figure 1 、 Figure 4 、 Figure 7 and Figure 8 As shown, the third touch electrode string 23 includes a plurality of third touch electrodes 231 and a plurality of third connection structures 232. The third connection structure 232 is used to connect two arbitrary adjacent third touch electrodes 231 in the same third touch electrode string 23. Optionally, as Figure 2 As shown, the third connection structure 232 and the third touch electrode 231 are arranged in the same layer.

[0092] In the embodiment of this application, Figure 1 and Figure 8As shown, the orthographic projection of the third touch electrode string 23 on the light-emitting functional layer 10 is separated from the orthographic projection of the first touch electrode string 21 on the light-emitting functional layer 10, that is, in the direction perpendicular to the light-emitting functional layer 10, there is no stacking relationship between the third touch electrode string 23 and the first touch electrode string 21, thereby avoiding the mutual influence of the touch capacitor and the pressure sensing capacitor in the touch layer 10, and ensuring the stability and accuracy of the touch capacitor and the pressure sensing capacitor.

[0093] Alternatively, as Figure 6 As shown, in one embodiment of the present application, the orthographic projection of the first connection structure 212 on the light-emitting functional layer 10 and the orthographic projection of the second connection structure 222 on the light-emitting functional layer 10 partially overlap.

[0094] In the embodiment of this application, Figure 1 、 Figure 5 and Figure 6 As shown, the orthographic projection of the first connection structure 212 on the light-emitting functional layer 10 and the orthographic projection of the second connection structure 222 on the light-emitting functional layer 10 partially overlap.

[0095] Optionally, in one embodiment of the present application, the material of the elastic insulating layer 24 includes any one of silicone, acrylic acid and polyurethane.

[0096] In an embodiment of the present application, the material for making the elastic insulating layer 24 may include silicone, acrylic, and polyurethane, etc. Optionally, the material for making the elastic insulating layer 24 may be a sticky elastic insulating material such as PSA (Pressure Sensitive Adhesive) and PU (Poly-Urethane).

[0097] Optionally, in one embodiment of the present application, a vertical distance between the surface of the elastic insulating layer 24 away from the third touch electrode 231 and the third touch electrode 231 is not less than 2 micrometers and not more than 10 micrometers.

[0098] In the embodiment of the present application, along the direction perpendicular to the light-emitting functional layer 10, the vertical distance from the surface of the elastic insulating layer 24 away from the third touch electrode 231 to the third touch electrode 231 is not less than 2 microns and not more than 10 microns, that is, the thickness of the elastic insulating layer 24 is less than 2 microns and not more than 10 microns, thereby ensuring that the elastic insulating layer 24 has sufficient deformation function during the user's touch operation, which not only ensures the working performance of the pressure sensing capacitor, but also avoids increasing the thickness of the display panel, which is conducive to the development of lighter and thinner display devices.

[0099] Alternatively, as Figure 5-Figure 8As shown, in one embodiment of the present application, a buffer layer 30 is provided on one side of the light-emitting functional layer 10, and the touch layer 20 is provided on the side of the buffer layer 30 away from the light-emitting functional layer 10. By providing the buffer layer 30 to isolate the light-emitting functional layer 10 and the touch layer 20, the mutual influence between the light-emitting functional layer 10 and the touch layer 20 can be prevented, and the stability of the display panel operation can be guaranteed.

[0100] Alternatively, as Figure 5-Figure 8 As shown, in one embodiment of the present application, a protective layer 40, a polarizing layer 50, and a protective cover plate 60 are sequentially stacked on the side of the film layer where the first touch electrode string 21 of the touch layer 20 is located away from the light-emitting functional layer 10. Optionally, the protective layer 40 is an organic film layer, and the protective cover plate 60 is a glass cover plate.

[0101] like Figure 9 As shown in the figure, a touch operation diagram of a display panel provided in an embodiment of the present application will be combined with Figure 9 The working principle of the touch layer 20 of the display panel provided in the embodiment of the present application is specifically described. Figure 9 The dashed line in the figure represents the electric field diagram. When the user touches the screen with his finger, the finger is equivalent to the ground terminal.

[0102] like Figure 9 As shown, in the touch layer 20 of the display panel, the first touch electrode string 21 and part of the second touch electrode string 22 are arranged in the same layer and are insulated from each other, so that the first touch electrode string 21 and the second touch electrode string 22 form a touch capacitor, and the third touch electrode string 23, the second touch electrode string 22 and the elastic insulating layer 24 located therebetween jointly form a pressure sensing capacitor.

[0103] When the user touches the screen with his finger, since the finger is a conductor, it will affect the electric field between the touch capacitors, causing the capacitance value of the touch capacitor to change, resulting in a decrease in the original capacitance value of the touch capacitor. By analyzing where the touch capacitor in the touch layer 20 changes, the planar two-dimensional coordinate information of the user's touch operation can be obtained, and the touch coordinates of the user's finger can be determined.

[0104] At the same time, because the elastic insulating layer 24 has good elasticity, the touch of the user's finger causes compression deformation of the elastic insulating layer 24, reducing the distance between the second touch electrode 221 and the third touch electrode 231, thereby causing the capacitance value of the pressure sensing capacitor to change. According to the formula for a flat capacitor, the capacitance value of the pressure sensing capacitor increases with the increase of the touch pressure of the user's finger. By analyzing the degree of change in the capacitance value of the pressure sensing capacitor, the touch force information of the user's finger can be obtained. This enables the touch layer 20 to detect the user's touch information from three dimensions: X, Y, and Z, realizing three-dimensional touch detection of the display panel.

[0105] Alternatively, as Figure 10 As shown, in one embodiment of the present application, the touch layer 20 of the display panel further includes: a plurality of first signal lines 71 , a plurality of second signal lines 72 and a plurality of third signal lines 73 .

[0106] In the embodiment of this application, Figure 10 As shown, multiple first signal lines 71, multiple second signal lines 72 and multiple third signal lines 73 are arranged on one side of the substrate 100, one end of the first signal line 71 is electrically connected to the first touch electrode string 21, and the other end is configured to be electrically connected to the control chip 200; one end of the second signal line 72 is electrically connected to the second touch electrode string 22, and the other end is configured to be electrically connected to the control chip 200; one end of the third signal line 73 is electrically connected to the third touch electrode string 23, and the other end is configured to be electrically connected to the control chip 200.

[0107] In the embodiment of the present application, by providing the first signal line 71 , the second signal line 72 and the third signal line 73 , the capacitance change signals of the touch capacitor and the pressure sensing capacitor can be transmitted to the control chip 200 for processing.

[0108] In the embodiment of this application, Figure 10 As shown, the first signal line 71, the first touch electrode string 21 and part of the second touch electrode string 22 are arranged on the same layer, and the second signal line 72, the third signal line 73 and the third touch electrode string 23 are arranged on the same layer, thereby simplifying the manufacturing process of the display panel and reducing the manufacturing difficulty of the display panel.

[0109] Alternatively, as Figure 10 As shown, the first signal line 71 and the third signal line 73 are both located on the same side of the display panel, thereby facilitating a narrow frame design for other frames.

[0110] In the embodiment of this application, Figure 10 As shown, the orthographic projection of the first signal line 71 on the third signal line 73 covers part of the third signal line 73, that is, the first signal line 71 and the third signal line 73 located in different film layers have a partially facing area, thereby saving the area occupied by the first signal line 71 and the third signal line 73, which is conducive to the narrow frame design of the frame.

[0111] Optionally, in an embodiment of the present application, the first touch electrodes 211 , the second touch electrodes 221 and the third touch electrodes 231 are all grid-shaped electrodes.

[0112] It should be noted that, in the embodiment of the present application, the first touch electrode 211, the second touch electrode 221 and the third touch electrode 231 are all grid-shaped electrodes. In order to facilitate intuitive understanding of the arrangement positions of the first touch electrode 211, the second touch electrode 221 and the third touch electrode 231, Figures 1-10 In FIG. 1 , the first touch electrode 211 , the second touch electrode 221 and the third touch electrode 231 are represented by blocks.

[0113] In the embodiment of the present application, by setting the first touch electrode 211, the second touch electrode 221 and the third touch electrode 231 to be grid-shaped electrodes, the touch electrodes can reduce the shielding of light from the light-emitting functional layer 10, thereby ensuring the light extraction rate and the display brightness of the display panel.

[0114] Optionally, the light-emitting functional layer 10 includes an organic light-emitting unit and a pixel definition layer for limiting the position of the organic light-emitting unit. Optionally, the grid of the grid electrode overlaps with the pixel definition layer when projected onto the light-emitting functional layer 10, i.e., the openings of the grid electrode face the organic light-emitting unit. This further reduces the obstruction of light emitted by the organic light-emitting unit by the touch electrode, thereby further ensuring the display brightness of the display panel.

[0115] Alternatively, as Figure 1 As shown, in one embodiment of the present application, the shapes of the orthographic projections of the first touch electrode 211 , the second touch electrode 221 and the third touch electrode 231 on the light-emitting functional layer 10 include at least one of a square, a rhombus, a parallelogram and a triangle.

[0116] Those skilled in the art understand that they can set the shapes of the first touch electrode 211, the second touch electrode 221 and the third touch electrode 231 according to actual needs. For example, the shape of the touch electrode located at the edge of the display area can also be a polygon or a combination of straight line segments and curved segments, etc., to ensure that touch electrodes can also be provided at the edge of the display area, thereby improving the touch performance of the edge of the display area and ensuring the user experience.

[0117] Based on the same inventive concept, an embodiment of the present application provides a display device, including: any one of the display panels provided in the above embodiments.

[0118] The display device provided in the embodiment of the present application has the same inventive concept and the same beneficial effects as the previous embodiments. The contents of the touch display panel in the display device not shown in detail can be referred to the previous embodiments and will not be repeated here.

[0119] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0120] In an embodiment of the present application, the first touch electrode string 21 and part of the second touch electrode string 22 are arranged in the same layer on the side of the elastic insulating layer 24 away from the light-emitting functional layer 10, and the first touch electrode string 21 and the second touch electrode string 22 are insulated from each other, so that the first touch electrode string 21 and the second touch electrode string 22 form a touch capacitor to detect the planar two-dimensional coordinate information of the user's touch operation.

[0121] In the embodiment of the present application, the third touch electrode string 23, the elastic insulating layer 24 and the second touch electrode string 22 are stacked in sequence along a direction perpendicular to the light-emitting functional layer 10, and the positive projections of the third touch electrode string 23 and the second touch electrode string 22 on the light-emitting functional layer 10 at least partially overlap, that is, the third touch electrode string 23 and the second touch electrode string 22 are at least partially opposite, so that the third touch electrode string 23, the second touch electrode string 22 and the elastic insulating layer 24 located therebetween form a pressure sensing capacitor. When a user touches the touch, since the elastic insulating layer 24 has good elasticity, the elastic insulating layer 24 will deform to a certain extent, thereby causing the capacitance value of the pressure sensing capacitor to change, and then the touch force information in the user's touch operation can be detected through the pressure sensing capacitor, so that the touch layer 20 can detect the three-dimensional touch information of the user's touch operation.

[0122] Moreover, in the display panel provided in the embodiment of the present application, the original conductive layer is used to set the third touch electrode string 23, so that the display panel can realize the detection of three-dimensional touch information without increasing the thickness and the complexity of the film layer, which is beneficial to improving the lightness and thinness of the display panel, does not increase the complexity of the manufacturing process, and facilitates mass production.

[0123] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in this application may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0124] In the description of this application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are exemplary directions or positional relationships based on the accompanying drawings. They are intended to facilitate or simplify the description of the embodiments of this application, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0125] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0126] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0127] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0128] It should be understood that, although the various steps in the flowchart of the accompanying drawings are displayed in sequence according to the indication of the arrows, the order of implementation of these steps is not limited to the order indicated by the arrows. Unless otherwise clearly stated herein, in some implementation scenarios of the embodiments of the present application, the steps in each process can be performed in other orders according to demand. Moreover, some or all of the steps in each flow chart can include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages can be executed at the same time, or at different times. Under different scenarios at the execution time, the execution order of these sub-steps or stages can be flexibly configured according to demand, and the embodiments of the present application do not limit this.

[0129] The above is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application also fall within the protection scope of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: a light-emitting functional layer; A touch layer is provided on one side of the light-emitting functional layer; The touch layer includes at least two first touch electrode strings, at least two second touch electrode strings, at least two third touch electrode strings, and an elastic insulating layer. The first touch electrode strings and the third touch electrode strings extend along a first direction parallel to the light-emitting functional layer, and the second touch electrode string extends along a second direction parallel to the light-emitting functional layer, and the first direction intersects the second direction. The third touch electrode string is arranged on one side of the light-emitting functional layer, and the elastic insulating layer is arranged on a side of the third touch electrode string away from the light-emitting functional layer. The first touch electrode string and part of the second touch electrode string are arranged in the same layer on a side of the elastic insulating layer away from the light-emitting functional layer, and the first touch electrode string and the second touch electrode string are insulated from each other. The orthographic projections of the third touch electrode string and the second touch electrode string on the light-emitting functional layer at least partially overlap. The second touch electrode string includes at least two electrically connected second touch electrodes, and the third touch electrode string includes at least two electrically connected third touch electrodes; The orthographic projections of the third touch electrode and the second touch electrode on the light-emitting functional layer overlap, or the orthographic projection of the third touch electrode on the light-emitting functional layer is located within the orthographic projection range of the second touch electrode on the light-emitting functional layer; In the same first touch electrode string, any two adjacent first touch electrodes are connected via a first connection structure in the same layer; In the same string of second touch electrodes, any two adjacent second touch electrodes are connected via a second connecting structure, the second connecting structure is provided on the same layer as the third touch electrode, and the second connecting structure is connected to the second touch electrode via a via in the elastic insulating layer; In the same third touch electrode string, any two adjacent third touch electrodes are connected via a third connection structure on the same layer.

2. The display panel according to claim 1, wherein: The first touch electrode string includes at least two electrically connected first touch electrodes; The first touch electrodes and the second touch electrodes are arranged in the same layer, and are alternately arranged along a plane parallel to the light-emitting functional layer.

3. The display panel according to claim 1, wherein: The orthographic projection of the first connection structure and the orthographic projection of the second connection structure on the light-emitting functional layer partially overlap.

4. The display panel according to claim 1, wherein: The elastic insulating layer is made of any one of silicone, acrylic acid and polyurethane.

5. The display panel according to claim 1, wherein: A vertical distance between a surface of the elastic insulating layer away from the third touch electrode and the third touch electrode is not less than 2 micrometers and not more than 10 micrometers.

6. The display panel according to claim 1, wherein: The touch layer further includes: a first signal trace, one end of which is electrically connected to the first touch electrode string, and the other end of which is configured to be electrically connected to the control chip; a second signal line, one end of which is electrically connected to the second touch electrode string, and the other end of which is configured to be electrically connected to the control chip; a third signal line, one end of which is electrically connected to the third touch electrode string, and the other end of which is configured to be electrically connected to the control chip; The first signal routing, the first touch electrode string and part of the second touch electrode string are arranged on the same layer; the second signal routing and the third signal routing are arranged on the same layer, and the orthographic projection of the first signal routing on the third signal routing covers part of the third signal routing.

7. The display panel according to claim 2, wherein: The first touch electrode, the second touch electrode, and the third touch electrode are all grid-shaped electrodes.

8. A display device, characterized in that: include: The display panel according to any one of claims 1 to 7.

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