A display panel and display device

Abstract

The application discloses a display panel and a display device, comprising: a substrate, a driving layer, a light emitting device layer and a touch layer. The touch layer is provided with a first electrode and a second electrode which are insulated from each other. A plurality of first hollow parts are arranged in the second electrode, and a first conductive part in the first electrode is divided into two parts, i.e. a first sub-part and a second sub-part. The first sub-part is arranged adjacent to the second electrode, and the second sub-part is arranged at a position corresponding to the first hollow part. In this way, the first sub-part and the second sub-part form a mutual capacity structure with the second electrode, thereby increasing the interaction area between the first electrode and the second electrode, and increasing the change amount of the mutual capacity value between the first electrode and the second electrode before and after touch, i.e. increasing the touch signal amount, so that a touch operation that cannot be detected originally can also be detected, and the touch precision and the touch sensitivity of the touch display panel are improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] Organic light-emitting diode (OLED) displays have gained popularity among customers and have developed rapidly due to their high contrast and wide color gamut. Their applications are also expanding to large-screen displays such as those used in automobiles and laptops (NBs).

[0003] Current displays typically feature touch functionality. Touchscreens, as human-computer interaction devices, offer advantages such as directness, efficiency, accuracy, smoothness, and style, greatly improving the efficiency and convenience of human-computer interaction. Touchscreens can be categorized into resistive, capacitive, and infrared optical types. Capacitive touchscreens are generally further divided into mutual-capacitance touchscreens and self-capacitance touchscreens. In mutual-capacitance touchscreens, horizontal and vertical electrodes are typically fabricated, forming capacitors at their intersections. When a finger touches the screen, it affects the coupling between the two electrodes near the touch location, thus changing the capacitance between them. Based on this change in capacitance, the coordinates of the touch location can be calculated.

[0004] In automotive applications, touch modes such as glove touch and gesture touch place higher demands on the amount of touch signals on the touchscreen, and traditional touch patterns cannot meet the needs of automotive applications. Summary of the Invention

[0005] This invention provides a display panel and a display device that can increase the interaction area between the touch driving electrode and the touch sensing electrode, thereby increasing the amount of touch signal between the touch driving electrode and the touch sensing electrode, and also improving the touch accuracy and touch sensitivity of the touch display panel.

[0006] A first aspect of the present invention provides a display panel, comprising:

[0007] Substrate;

[0008] The driving layer is located on the substrate.

[0009] A light-emitting device layer is located on the side of the driving layer opposite to the substrate; and

[0010] The touch layer is located on the side of the light-emitting device layer opposite to the driving layer;

[0011] The touch layer includes: a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes are insulated from each other; the plurality of first electrodes extend along a first direction and are arranged along a second direction; the plurality of second electrodes extend along the second direction and are arranged along the first direction; the first direction and the second direction intersect.

[0012] The first electrode includes a plurality of first conductive portions and a plurality of first connecting portions, and adjacent first conductive portions are connected through the first connecting portions; the plurality of first conductive portions includes a plurality of first sub-parts and a plurality of second sub-parts;

[0013] The second electrode includes a plurality of first hollow portions; the second sub-parts are disposed at positions corresponding to the first hollow portions, one first hollow portion corresponds to at least one second sub-part, the orthographic projection of the second sub-part on the substrate and the orthographic projection of the corresponding first hollow portion on the substrate have an overlapping area; the orthographic projection of the first sub-part on the substrate and the orthographic projection of the first hollow portion on the substrate do not overlap.

[0014] In some embodiments of the present invention, the touch layer includes a first touch layer, a second touch layer and a first insulating layer stacked together, wherein the first insulating layer is located between the first touch layer and the second touch layer.

[0015] In some embodiments of the present invention, the second electrode includes at least two second conductive portions and a plurality of second connecting portions; the at least two second conductive portions are arranged along the first direction and extend along the second direction; adjacent second conductive portions are connected by a plurality of second connecting portions; each second conductive portion and each second connecting portion forms the plurality of first hollow portions;

[0016] A plurality of first sub-parts arranged along the second direction are provided between adjacent second electrodes;

[0017] The first electrode includes a plurality of first sub-parts and a plurality of second sub-part groups arranged alternately along the first direction, and the second sub-part group includes at least one second sub-part; two adjacent second sub-parts along the first direction in the same first electrode and adjacent first sub-parts and second sub-part groups are connected by the first connecting portion.

[0018] In some embodiments of the present invention, the second electrode includes three second conductive portions; one first hollow portion corresponds to two second sub-portions;

[0019] The second sub-group in the first electrode includes four second sub-groups, which are arranged in two rows and two columns along the first direction and the second direction; two adjacent second sub-groups along the first direction in the same second sub-group are connected to each other through the first connecting portion;

[0020] The width of the first sub-part along the second direction is greater than the width of the second sub-part along the second direction; the first sub-part is connected to two adjacent rows of the second sub-part along the first direction via the first connecting part.

[0021] In some embodiments of the present invention, the second electrode is located on the first touch layer, and the first electrode is located on the second touch layer; there may or may not be an overlapping area between the orthographic projection of the first conductive portion on the substrate and the orthographic projection of the second electrode on the substrate;

[0022] Alternatively, the second electrode and the first conductive part are located in the first touch layer, the first connecting part is located in the second touch layer, and the first connecting part is connected to the first conductive part through a through hole in the first insulating layer; there is a gap between the first sub-part and the adjacent second electrode, the second sub-part is located in the corresponding first hollow part, and there is a gap between the second sub-part and the edge of the corresponding first hollow part.

[0023] In some embodiments of the present invention, the second electrode includes a plurality of second conductive portions and a plurality of second connecting portions; adjacent second conductive portions are connected through the second connecting portions; the plurality of second conductive portions includes a plurality of third sub-portions and a plurality of fourth sub-portions;

[0024] The first electrode includes a plurality of second hollow portions; the fourth sub-part is disposed at a position corresponding to the second hollow portion, one second hollow portion corresponds to at least one fourth sub-part, and the orthographic projection of the fourth sub-part on the substrate and the orthographic projection of the corresponding second hollow portion on the substrate have an overlapping area; the orthographic projection of the third sub-part on the substrate and the orthographic projection of the second hollow portion on the substrate do not overlap.

[0025] In some embodiments of the present invention, a third sub-part includes a first hollowed-out part, and a first hollowed-out part corresponds to a second sub-part;

[0026] Each of the first sub-parts includes a second hollowed-out portion, and each of the second hollowed-out portions corresponds to one of the fourth sub-parts;

[0027] Each of the first sub-parts in the same first electrode is interconnected with the adjacent second sub-parts on the same side in the second direction via the first connecting part;

[0028] Each of the third sub-parts in the same second electrode is interconnected with the adjacent fourth sub-part on the same side of the first direction via the second connecting part.

[0029] In some embodiments of the present invention, the first sub-part and the third sub-part are located in the first touch layer;

[0030] The first connecting portion includes a first sub-connecting portion, which is used to connect adjacent first sub-parts and second sub-parts, and the first sub-connecting portion is located in the second touch layer; the second connecting portion includes a second sub-connecting portion, which is used to connect adjacent third sub-parts and fourth sub-parts, and the second sub-connecting portion is located in the second touch layer;

[0031] The second sub-part and the fourth sub-part are located in the second touch layer; the first sub-connection part is connected to the first sub-part through a via in the first insulating layer, and the second sub-connection part is connected to the third sub-part through a via in the first insulating layer; the orthographic projection of the first sub-part on the substrate and the orthographic projection of the fourth sub-part on the substrate may or may not overlap; the orthographic projection of the second sub-part on the substrate and the orthographic projection of the third sub-part on the substrate may or may not overlap.

[0032] Alternatively, the second sub-part and the fourth sub-part are located in the first touch layer; the first sub-connecting part is connected to the first conductive part through a via in the first insulating layer, and the second sub-connecting part is connected to the second conductive part through a via in the first insulating layer; the second sub-part is located within the corresponding first hollow part, and there is a gap between the second sub-part and the edge of the corresponding first hollow part; the fourth sub-part is located within the corresponding second hollow part, and there is a gap between the fourth sub-part and the edge of the corresponding second hollow part.

[0033] In some embodiments of the present invention, the first connecting portion further includes a third sub-connecting portion, the third sub-connecting portion being used to connect adjacent first sub-parts;

[0034] And / or, the second connecting portion further includes a fourth sub-connecting portion, the fourth sub-connecting portion being used to connect the adjacent third sub-portion;

[0035] The third sub-connection portion is located in the second touch layer, and the fourth sub-connection portion is located in the first touch layer; the third sub-connection portion is connected to the adjacent first sub-part through a via in the first insulating layer; or, the third sub-connection portion is located in the first touch layer, and the fourth sub-connection portion is located in the second touch layer; the fourth sub-connection portion is connected to the adjacent third sub-part through a via in the first insulating layer.

[0036] In some embodiments of the present invention, a third sub-part includes two first hollowed-out portions, and one first hollowed-out portion corresponds to one second sub-part;

[0037] Each of the first sub-parts includes a second hollowed-out portion, and each of the second hollowed-out portions corresponds to one of the fourth sub-parts;

[0038] Each of the first sub-parts in the same first electrode is interconnected with the adjacent second sub-parts on both sides in the second direction via the first connecting part;

[0039] Each of the third sub-parts in the same second electrode is interconnected with the adjacent fourth sub-part on the same side in the first direction via the second connecting portion.

[0040] In some embodiments of the present invention, the first sub-part and the third sub-part are located in the first touch layer;

[0041] The first connecting portion is used to connect adjacent first sub-parts and second sub-parts, and the first connecting portion is located in the second touch layer; the second connecting portion includes a second sub-connecting portion, which is used to connect adjacent third sub-parts and fourth sub-parts, and the second sub-connecting portion is located in the second touch layer;

[0042] The second sub-part and the fourth sub-part are located in the second touch layer; the first connecting part is connected to the first sub-part through a via in the first insulating layer, and the second sub-connecting part is connected to the third sub-part through a via in the first insulating layer; the orthographic projection of the first sub-part on the substrate and the orthographic projection of the fourth sub-part on the substrate may or may not overlap; the orthographic projection of the second sub-part on the substrate and the orthographic projection of the third sub-part on the substrate may or may not overlap.

[0043] Alternatively, the second sub-part and the fourth sub-part are located in the first touch layer; the first connecting part is connected to the first conductive part through a through-hole in the first insulating layer, and the second sub-connecting part is connected to the second conductive part through a through-hole in the first insulating layer; the second sub-part is located in the corresponding first hollow part, and there is a gap between the second sub-part and the edge of the corresponding first hollow part; the fourth sub-part is located in the corresponding second hollow part, and there is a gap between the fourth sub-part and the edge of the corresponding second hollow part.

[0044] In some embodiments of the present invention, the second connecting portion further includes a fourth sub-connecting portion, which is used to connect the adjacent third sub-portion, and the fourth sub-connecting portion is located in the first touch layer.

[0045] In some embodiments of the present invention, the width of the third sub-part along the first direction is greater than the width of the fourth sub-connecting part in the first direction, and the fourth sub-connecting part and the two connected third sub-parts form a recessed structure; the first sub-part includes protruding structures on both sides in the first direction, and the protruding structures and the recessed structures are mutually fitted.

[0046] In some embodiments of the present invention, the first electrode is a touch driving electrode and the second electrode is a touch sensing electrode; or, the first electrode is a touch sensing electrode and the second electrode is a touch driving electrode.

[0047] In some embodiments of the present invention, the display panel further includes:

[0048] An encapsulation layer covers the side of the light-emitting device layer that is opposite to the driving layer;

[0049] The touch layer is located on the side of the encapsulation layer opposite to the light-emitting device layer.

[0050] In some embodiments of the present invention, the encapsulation layer includes at least:

[0051] A first inorganic layer covers the side of the light-emitting device layer that is away from the driving layer;

[0052] The first organic layer is located on the side of the first inorganic layer that is away from the light-emitting device layer;

[0053] The second inorganic layer is located on the side of the first organic layer that is opposite to the first inorganic layer.

[0054] In some embodiments of the present invention, the first touch layer is located on the side close to the light-emitting device layer, and the second touch layer is located on the side of the first touch layer away from the light-emitting device layer;

[0055] Alternatively, the second touch layer is located on the side closer to the light-emitting device layer, and the first touch layer is located on the side of the second touch layer away from the light-emitting device layer.

[0056] In some embodiments of the present invention, the touch layer further includes: a buffer layer and a second insulating layer; the buffer layer is the outermost film layer of the touch layer facing the light-emitting device layer, and the second insulating layer is the outermost film layer of the touch layer away from the light-emitting device layer.

[0057] In some embodiments of the present invention, the first touch layer and the second touch layer are made of metal mesh.

[0058] A second aspect of the present invention provides a display device including any of the above-described display panels.

[0059] The display panel and display device provided in this invention include: a substrate, a driving layer, a light-emitting device layer, and a touch layer. The touch layer has a first electrode and a second electrode that are insulated from each other. Multiple first cutouts are formed in the second electrode, and the first conductive portion of the first electrode is divided into two parts, a first sub-part and a second sub-part. The first sub-part is adjacent to the second electrode, while the second sub-part is located at a position corresponding to the first cutouts. Thus, both the first and second sub-parts form a mutual capacitance structure with the second electrode, thereby increasing the interaction area between the first and second electrodes. The change in mutual capacitance between the first and second electrodes before and after touch increases, which in turn increases the amount of touch signal. This allows previously undetectable touch operations to be detected, improving the touch accuracy and sensitivity of the touch display panel. Attached Figure Description

[0060] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of the cross-sectional structure of a display panel provided in an embodiment of the present invention;

[0062] Figure 2 This is one of the schematic diagrams of the planar structure of the touch layer in related technologies;

[0063] Figure 3 For along Figure 2 Schematic diagram of the cross-sectional structure in the x-direction;

[0064] Figure 4 This is the second schematic diagram of the planar structure of the touch layer in related technologies;

[0065] Figure 5 For along Figure 4 A schematic diagram of the cross-sectional structure along the a-a' direction;

[0066] Figure 6 This is one of the schematic diagrams of the planar structure of the touch layer provided in the embodiments of the present invention;

[0067] Figure 7 This is a second schematic diagram of the planar structure of the touch layer provided in an embodiment of the present invention;

[0068] Figure 8 For along Figure 6 Schematic diagram of the cross-sectional structure in the b-b' direction;

[0069] Figure 9 For along Figure 7 Schematic diagram of the cross-sectional structure in the b-b' direction;

[0070] Figure 10 This is the third schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention;

[0071] Figure 11 Fourth schematic diagram of the planar structure of the touch layer provided in the embodiments of the present invention;

[0072] Figure 12 Fifth schematic diagram of the planar structure of the touch layer provided in the embodiments of the present invention;

[0073] Figure 13 For along Figure 12 A schematic diagram of the cross-sectional structure along the c1-c1' direction;

[0074] Figure 14 For along Figure 12 A schematic diagram of the cross-sectional structure along the c2-c2' direction;

[0075] Figure 15 For along Figure 12 A schematic diagram of the cross-sectional structure along the c3-c3' direction;

[0076] Figure 16 This is the sixth schematic diagram of the planar structure of the touch layer provided in the embodiments of the present invention;

[0077] Figure 17 For along Figure 16 A schematic diagram of the cross-sectional structure along the c1-c1' direction;

[0078] Figure 18 For along Figure 16 A schematic diagram of the cross-sectional structure along the c2-c2' direction;

[0079] Figure 19 For along Figure 16 A schematic diagram of the cross-sectional structure along the c3-c3' direction;

[0080] Figure 20 Seventh schematic diagram of the planar structure of the touch layer provided in the embodiments of the present invention;

[0081] Figure 21 For along Figure 20 A schematic diagram of the cross-sectional structure along the d1-d1' direction;

[0082] Figure 22 Eighth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention;

[0083] Figure 23 For along Figure 22 A schematic diagram of the cross-sectional structure along the d1-d1' direction;

[0084] Figure 24 A schematic diagram of the planar structure of the touch layer provided in an embodiment of the present invention (number nine);

[0085] Figure 25 For along Figure 24 A schematic diagram of the cross-sectional structure along the e1-e1' direction;

[0086] Figure 26 This is the tenth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention;

[0087] Figure 27 For along Figure 26 A schematic diagram of the cross-sectional structure along the e1-e1' direction;

[0088] Figure 28 Eleventh schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention;

[0089] Figure 29 For along Figure 28 A schematic diagram of the cross-sectional structure in the f1-f1' direction;

[0090] Figure 30 This is the twelfth schematic diagram of the planar structure of the touch layer provided in the embodiments of the present invention;

[0091] Figure 31 For along Figure 30 A schematic diagram of the cross-sectional structure in the f1-f1' direction;

[0092] Figure 32 This is the thirteenth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention;

[0093] Figure 33 Fourteenth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention;

[0094] Figure 34 For along Figure 32 A schematic diagram of the cross-sectional structure in the g1-g1' direction;

[0095] Figure 35 For along Figure 32 A schematic diagram of the cross-sectional structure in the g2-g2' direction;

[0096] Figure 36 For along Figure 32 A schematic diagram of the cross-sectional structure in the g3-g3' direction;

[0097] Figure 37 For along Figure 33 A schematic diagram of the cross-sectional structure in the g1-g1' direction;

[0098] Figure 38 For along Figure 33 A schematic diagram of the cross-sectional structure in the g2-g2' direction;

[0099] Figure 39 For along Figure 33 A schematic diagram of the cross-sectional structure in the g3-g3' direction. Detailed Implementation

[0100] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Terms describing position and direction in the present invention are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of the present invention. The accompanying drawings of the present invention are for illustrative purposes only and do not represent actual proportions.

[0101] Organic light-emitting diode (OLED) displays have gained popularity among customers and have developed rapidly due to their high contrast and wide color gamut. Their applications are also expanding to large-screen displays such as those used in automobiles and laptops (NBs).

[0102] Current displays typically feature touch functionality. Touchscreens, as human-computer interaction devices, offer advantages such as directness, efficiency, accuracy, smoothness, and style, greatly improving the efficiency and convenience of human-computer interaction. Touchscreens can be categorized into resistive, capacitive, and infrared optical types. Capacitive touchscreens are generally further divided into mutual-capacitance touchscreens and self-capacitance touchscreens. In mutual-capacitance touchscreens, horizontal and vertical electrodes are typically fabricated, forming capacitors at their intersections. When a finger touches the screen, it affects the coupling between the two electrodes near the touch location, thus changing the capacitance between them. Based on this change in capacitance, the coordinates of the touch location can be calculated.

[0103] Figure 1 This is a schematic diagram of the cross-sectional structure of a display panel provided in an embodiment of the present invention.

[0104] like Figure 1 As shown, the display panel provided in this embodiment of the invention includes: a substrate 1, a driving layer 2, a light-emitting device layer 3, and a touch layer 4.

[0105] The substrate 1 is located at the bottom of the display panel and serves to support and carry the load. In specific implementations, the substrate 1 is usually made of glass; when applied to flexible display panels, the substrate 1 can be made of flexible material, and there is no limitation here.

[0106] The driving layer 2 is located on the substrate 1. In this embodiment of the invention, the driving layer can be fabricated using thin-film technology. The driving layer 2 includes signal traces, thin-film transistors (TFTs), resistors, capacitors, and other components. The driving layer 2 is used to transmit driving signals, thereby controlling the display panel to display images.

[0107] The light-emitting device layer 3 is located on the side of the driving layer 2 facing away from the substrate 1. The light-emitting device layer 3 includes a plurality of light-emitting devices 31 arranged in an array. The display panel provided in this embodiment of the invention can be an OLED display panel, a light-emitting diode (LED) display panel, a quantum dot light-emitting diode (QLED) display panel, etc. When different types of display panels are used, the light-emitting devices 31 are different. Taking an OLED display panel as an example, the light-emitting devices in the OLED display panel are OLED devices. Each OLED device is connected to a pixel circuit in the driving layer 2, thereby being controlled by the pixel circuit to emit light of a corresponding brightness.

[0108] When using OLED display panels, since OLED devices need to be isolated from water and oxygen, an encapsulation layer is usually formed on the surface of the light-emitting device layer 3. The encapsulation layer can consist of alternately stacked inorganic and organic layers. As the simplest structure, the encapsulation layer includes at least a first inorganic layer, a first organic layer, and a second inorganic layer. The first inorganic layer covers the light-emitting device layer to isolate it from water and oxygen, protecting the light-emitting device. The second inorganic layer is located on the side of the first inorganic layer facing away from the light-emitting device layer; inorganic materials are typically dense and can effectively isolate water and oxygen, providing protection. The first organic layer is located between the first and second inorganic layers; adding an organic layer between adjacent inorganic layers can reduce stress.

[0109] The display panel provided in this embodiment of the invention is a touch display panel. Therefore, a touch layer 4 is also provided on the side of the light-emitting device layer 3 away from the driving layer 2. The touch layer 4 can be directly formed on the encapsulation layer (on-cell); or, the touch layer 4 can be made separately and then bonded to the display panel (add-on). In that case, the touch layer 4 needs to first be provided with a substrate, such as terephthalic acid and ethylene glycol (PET), glass, etc., which are not limited here.

[0110] Figure 2 This is one of the schematic diagrams of the planar structure of the touch layer in related technologies. Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure in the x-direction.

[0111] like Figure 2 As shown, the touch layer includes a plurality of first electrodes 41 and a plurality of second electrodes 42, which are insulated from each other. The first electrodes 41 extend along a first direction x and are arranged along a second direction y; the second electrodes 42 extend along the second direction y and are arranged along the first direction x; the first direction x and the second direction y intersect. In a specific implementation, the first direction x and the second direction y can be perpendicular to each other; the first direction x can be a row direction and the second direction y can be a column direction; or, the first direction x can be a column direction and the second direction y can be a row direction.

[0112] The first electrode 41 can be a touch driving electrode, and the second electrode 42 can be a touch sensing electrode; or, the first electrode 41 can be a touch sensing electrode, and the second electrode 42 can be a touch driving electrode. This constitutes a mutual capacitance touch mode.

[0113] like Figure 3 As shown, the touch layer 4 includes: a buffer layer 4e, a first touch layer 4a, a first insulating layer 4b, a second touch layer 4c, and a second insulating layer 4d.

[0114] The buffer layer 4e is the outermost film layer of the touch layer facing the light-emitting device layer. In an OLED touch display panel, the buffer layer 4e can be formed directly on the encapsulation layer. The second insulating layer 4d is the outermost film layer of the touch layer facing away from the light-emitting device layer, providing insulation protection for the touch layer. The first touch layer 4a, the second touch layer 4c, and the first insulating layer 4b are all located between the buffer layer 4e and the second insulating layer 4d, and the first insulating layer 4b is located between the first touch layer 4a and the second touch layer 4c, serving to insulate the first touch layer 4a and the second touch layer 4c from each other.

[0115] The first touch layer 4a and the second touch layer 4c can be made of materials such as indium tin oxide (ITO), metal mesh, nano-metals, and carbon nanotubes, and are not limited here. The first insulating layer 4b is located between the first touch layer 4a and the second touch layer 4c to insulate the two conductive layers. The second insulating layer 4d is located on the outermost side of the second touch layer 4c and is used to insulate and protect the touch layer.

[0116] exist Figure 3The first touch layer 4a is placed on the lower side and the second touch layer 4c is placed on the upper side. This is just an example. In actual implementation, the positions of the first touch layer 4a and the second touch layer 4c can be interchanged. This is not a limitation.

[0117] In related technologies, such as Figure 3 As shown, the first electrode 41 and the second electrode 42 are located on different touch layers. Both the first electrode 41 and the second electrode 42 are strip-shaped electrodes, and the intersection of the two electrodes forms a capacitor. When a finger touches the screen, it affects the coupling between the two electrodes near the touch position, thereby changing the capacitance between the two electrodes. Based on the change in capacitance, the coordinates of the touch position can be calculated.

[0118] because Figure 2 The electrode structure shown can only form a capacitor at the intersection of the first electrode 41 and the second electrode 42. Therefore, the interaction area between the two electrodes is limited, and the change in the capacitance sensing signal between the first electrode 41 and the second electrode 42 is small, resulting in low touch accuracy and touch sensitivity.

[0119] To improve the above problems, the interaction region between the first and second electrodes can be increased, and a design can be made to... Figure 4 The touch graphic shown. Figure 4 This is the second schematic diagram of the planar structure of the touch layer in related technologies. Figure 5 For along Figure 4 A schematic diagram of the cross-sectional structure along the a-a' direction.

[0120] like Figure 4 and Figure 5 As shown, both the first electrode 41 and the second electrode 42 include multiple electrode blocks, and each electrode block is disposed in the first touch layer 4a. The electrode blocks in the second electrode 42 are interconnected along the second direction y, and the electrode blocks in the first electrode 41 are interconnected along the first direction x via bridges located in the second touch layer 4c. Similarly, the positions of the first touch layer 4a and the second touch layer 4c can be interchanged. When the positions of the first touch layer 4a and the second touch layer 4c are interchanged, the electrode blocks can be disposed in the upper touch layer, and the bridges can be disposed in the lower touch layer; no limitation is made here.

[0121] By placing the electrode blocks of the first electrode 41 and the second electrode 42 on the same touch layer and spacing the adjacent electrode blocks with a certain gap, the interaction area between the first electrode 41 and the second electrode 42 can be increased to a certain extent, thereby increasing the amount of change in the capacitive sensing signal between the first electrode and the second electrode.

[0122] When this touch display panel is applied to automotive display scenarios, the table below shows the mutual capacitance values ​​between the first and second electrodes under various touch modes.

[0123] mutual compatibility unit finger touch Glove Touch Cm pf 0.624 0.624 Cm1 pf 0.562 Cm2 pf 0.622 ΔCm pf 0.062 0.002 ΔCm / Cm 9.94％ 0.32％

[0124] Where Cm represents the mutual capacitance value between the first electrode and the second electrode, Cm1 represents the mutual capacitance value between the first electrode and the second electrode in finger touch mode, Cm2 represents the mutual capacitance value between the first electrode and the second electrode in glove touch mode, ΔCm represents the change in mutual capacitance value before and after touch, and ΔCm / Cm represents the rate of change of mutual capacitance value before and after touch.

[0125] As can be seen from the table above, for finger touch mode, the signal change before and after touch is 0.062pf, which meets the IC's testing specifications. However, automotive touch displays involve more touch modes, especially glove touch and gesture touch modes. Since the fingers do not directly contact the screen, the signal change before and after touch in glove touch mode is only 0.002pf, which does not meet the specifications.

[0126] Therefore, when applied to scenarios such as automotive touch displays, higher requirements are placed on the amount of touch signals on the touch display panel, and traditional touch patterns cannot meet the touch requirements.

[0127] In view of this, embodiments of the present invention provide a display panel that can further increase the interaction area between the touch driving electrode and the touch sensing electrode, thereby increasing the amount of touch signal between the touch driving electrode and the touch sensing electrode, and also improving the touch accuracy and touch sensitivity of the touch display panel.

[0128] Figure 6 This is one of the schematic diagrams of the planar structure of the touch layer provided in the embodiments of the present invention. Figure 7 This is a second schematic diagram of the planar structure of the touch layer provided in an embodiment of the present invention; Figure 8 For along Figure 6 A schematic diagram of the cross-sectional structure in the b-b' direction. Figure 9 For along Figure 7 A schematic diagram of the cross-sectional structure in the b-b' direction.

[0129] It should be noted that when the conductive part and the connecting part in the first electrode or the second electrode are located in the same touch layer, the conductive part and the connecting part are formed using the same patterning process, and the thickness of the conductive part and the connecting part are equal. In order to facilitate the distinction between the conductive part and the connecting part in the accompanying drawings of this invention, different thicknesses are used, wherein the thickness of the conductive part is greater than the thickness of the connecting part. The following drawings are all applicable.

[0130] like Figure 6 and Figure 7As shown, the first electrode 41 includes a plurality of first conductive portions 41m and a plurality of first connecting portions 41n, and adjacent first conductive portions 41m are connected through the first connecting portions 41n; the plurality of first conductive portions 41m includes a plurality of first sub-parts 411 and a plurality of second sub-parts 412.

[0131] The second electrode 42 includes a plurality of first hollow portions 42s, and a second sub-part 412 is disposed at a position corresponding to the first hollow portion 42s. One first hollow portion 42s corresponds to at least one second sub-part 412. The orthographic projection of the second sub-part 412 on the substrate overlaps with the orthographic projection of the corresponding first hollow portion 42s on the substrate. The orthographic projection of the first sub-part 411 on the substrate does not overlap with the orthographic projection of the first hollow portion 42s on the substrate.

[0132] In this embodiment of the invention, by providing multiple first hollow portions 42s in the second electrode 42 and dividing the first conductive portion 41m in the first electrode 41 into two parts, namely a first sub-part 411 and a second sub-part 412, wherein the first sub-part 411 is disposed adjacent to the second electrode 42, and the second sub-part 412 is disposed at the position corresponding to the first hollow portions 42s, both the first sub-part 411 and the second sub-part 412 form a mutual capacitance structure with the second electrode 42, thereby increasing the interaction area between the first electrode 41 and the second electrode 42. The change in the mutual capacitance value between the first electrode 41 and the second electrode 42 before and after touch increases, that is, the touch signal quantity increases, making touch operations that were previously undetectable detectable, which is beneficial to improving the touch accuracy and touch sensitivity of the touch display panel.

[0133] In specific implementation, the first electrode 41 can be a touch driving electrode and the second electrode 42 can be a touch sensing electrode; or, the first electrode 41 can be a touch sensing electrode and the second electrode 42 can be a touch driving electrode, which is not limited here.

[0134] The following table shows the adopted methods. Figure 6 or Figure 7 The mutual capacitance value between the first and second electrodes is given in the structure shown, under various touch modes.

[0135]

[0136]

[0137] Where Cm represents the mutual capacitance value between the first electrode and the second electrode, Cm1 represents the mutual capacitance value between the first electrode and the second electrode in finger touch mode, Cm2 represents the mutual capacitance value between the first electrode and the second electrode in glove touch mode, and ΔCm represents the change in mutual capacitance value before and after touch.

[0138] As can be seen from the table above, compared with the touch patterns in related technologies, the touch signal quantity (mutual capacitance value between the first electrode and the second electrode) Cm provided by the embodiments of the present invention is increased by (2.77-0.624) / 0.624×100%=343%. The touch signal change in the glove touch mode is increased from 0.002 to 0.012, which can meet the IC detection specifications. At the same time, the touch signal quantity in the finger touch mode is also increased, which can improve the touch performance such as the sensitivity of the finger touch mode.

[0139] In some embodiments, such as Figure 8 As shown, the second electrode 42 can be located in the first touch layer 4a, and the first electrode 41 can be located in the second touch layer 4c. The first electrode 41 and the second electrode 42 are located in different conductive layers, and a first insulating layer 4b is between them for insulation protection. At this time, the orthographic projection of the first conductive part 41m on the substrate may overlap with the orthographic projection of the second electrode 42 on the substrate, or there may be no overlap between the orthographic projection of the first conductive part 41m on the substrate and the orthographic projection of the second electrode 42 on the substrate.

[0140] The first electrode 41 and the second electrode 42 are respectively placed in different conductive layers. By designing a suitable pattern, the interaction area between the first electrode and the second electrode can be increased. Since there is a first insulating layer 4b between the first electrode 41 and the second electrode 42, the accuracy requirement for the positional relationship between the two is not high, and it is easy to manufacture.

[0141] Optionally, the positions of the first touch layer 4a and the second touch layer 4c can be interchanged. In specific implementation, the positions of the first electrode 41 and the second electrode 42 can be set according to actual needs, and no limitation is made here.

[0142] In some embodiments, such as Figure 9 As shown, the second electrode 42 and the first conductive part 41m can be located in the first touch layer 4a, and the first connecting part 41n can be located in the second touch layer 4c. The first connecting part 41n is connected to the first conductive part 41m through a through-hole in the first insulating layer 4b. There is a gap between the first sub-part 411 and the adjacent second electrode 42, and the second sub-part 412 is located within the corresponding first hollow part 42s, with a gap between the second sub-part 412 and the edge of the corresponding first hollow part 42s.

[0143] By placing the first conductive portion 41m and the second electrode 42 of the first electrode in the first touch layer, and placing the first connecting portion 41n of the first electrode in the second touch layer, the pattern of the second touch layer can be simplified. When the first conductive portion 41m and the second electrode 42 are located in the same touch layer, the first conductive portion 41m and the second electrode 42 need to be spaced at a predetermined distance to avoid short circuits in their electrical connection. Simultaneously, since there are gaps between the first sub-part and the second electrode, as well as between the second sub-part and the edge of the first hollow portion, the area of ​​the touch electrode is correspondingly reduced, which is equivalent to reducing the coupling area between the touch electrode and the display panel, thus helping to reduce noise between the touch layer and the display panel.

[0144] Optionally, the positions of the first touch layer 4a and the second touch layer 4c can be interchanged. When the positions of the two touch layers are interchanged, the first connecting part 41n is located on the touch layer closer to the light-emitting device, while the first conductive part 41m and the second electrode 42 are both located on the touch layer farther away from the light-emitting device. The first connecting part 41n only has the function of electrical connection, and its size is smaller than that of the first conductive part 41m and the second electrode. This arrangement helps to reduce the noise between the touch electrode and the light-emitting device.

[0145] In some embodiments, such as Figure 6 and Figure 7 As shown, the second electrode 42 may include at least two second conductive portions 42m and a plurality of second connecting portions 42n. Each second conductive portion 42m is arranged along a first direction x and extends along a second direction y, with adjacent second conductive portions 42m spaced apart by a predetermined distance. A plurality of second connecting portions 42n arranged along the second direction y are provided between two adjacent second conductive portions 42m, with adjacent second connecting portions 42n spaced apart by a predetermined distance. The second connecting portions 42n are used to connect adjacent second conductive portions 42m. Thus, the second conductive portions 42m and each second connecting portion 42n form a plurality of first hollow portions 42s.

[0146] In this embodiment of the invention, the first sub-part 411 of the first electrode is disposed between adjacent second electrodes 42, and the second sub-part 412 of the first electrode is disposed in the first hollowed-out area 42s of the second electrode 42, thereby increasing the interaction area between the first electrode and the second electrode.

[0147] Since the first electrode 41 extends along the first direction x, it is necessary to connect the first sub-parts 411 and the second sub-parts 412 arranged along the first direction x to each other through the first connecting part 42n.

[0148] like Figure 6 and Figure 7As shown, a plurality of first sub-parts 411 arranged along the second direction y are provided between adjacent second electrodes 42; the first electrode 41 includes a plurality of first sub-parts 411 and a plurality of second sub-part groups 412g arranged alternately along the first direction x, and the second sub-part group 412g includes at least one second sub-part 412; two adjacent second sub-parts 412 in the same first electrode 41 along the first direction x and adjacent first sub-parts 411 and second sub-part groups 412g are connected by a first connecting part 42n.

[0149] In specific implementation, the number and arrangement rules of the second sub-parts 412 in the second sub-part group 412g are related to the distribution of the first hollow part 42s.

[0150] by Figure 6 and Figure 7 Taking the structure shown as an example, the second sub-part group 412g includes two second sub-parts 412, and the two second sub-parts 412 are arranged along the first direction x. Adjacent second sub-parts 412 within the same first electrode 41 are connected by a first connecting part 41n, and adjacent second sub-parts 412 are also connected to the first sub-part 411 by the first connecting part 41n. The number of first connecting parts 41n connecting adjacent second sub-parts 412, or adjacent first sub-parts 411 and second sub-parts 412, can be set according to actual needs. Figure 6 and Figure 7 For example, two adjacent second sub-parts 412, as well as two adjacent first sub-parts 411 and second sub-parts 412, are connected by two first connecting parts 41n, which can ensure the effectiveness of the electrical connection.

[0151] In addition, the number of second sub-parts 412 set in the first hollow part 42s can also cause changes in the number and arrangement rules of the second sub-parts 412 in the second sub-part group 412g.

[0152] Figure 10 This is the third schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 11 The fourth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention.

[0153] by Figure 10 and Figure 11Taking the structure shown as an example, the second electrode 42 may include three second conductive portions 42m; two second sub-parts 412 are correspondingly arranged within a first hollow portion 42s. At this time, the second sub-part group 412g includes four second sub-parts 412, arranged in two rows and two columns along the first direction x and the second direction y. By making the width of the first sub-part 411 along the second direction y greater than the width of the second sub-part 412 along the second direction y, the first sub-part 411 can be arranged corresponding to two rows of second sub-parts 412, thus allowing both rows of second sub-parts 412 to be connected to adjacent first sub-parts 411 to form the first electrode 41. Similarly, adjacent two second sub-parts 412, and adjacent first sub-parts 411 and second sub-parts 412, can be connected by one or more first connecting portions 41n to form the first electrode 41. Figure 10 and Figure 11 For example, two adjacent second sub-parts 412, as well as adjacent first sub-parts 411 and second sub-parts 412, can be connected by two first connecting parts 41n to ensure the effectiveness of the electrical connection.

[0154] Figure 12 This is the fifth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 13 For along Figure 12 A schematic diagram of the cross-sectional structure along the c1-c1' direction. Figure 14 For along Figure 12 A schematic diagram of the cross-sectional structure along the c2-c2' direction. Figure 15 For along Figure 12 A schematic diagram of the cross-sectional structure in the c3-c3' direction.

[0155] Figure 16 This is the sixth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 17 For along Figure 16 A schematic diagram of the cross-sectional structure along the c1-c1' direction. Figure 18 For along Figure 16 A schematic diagram of the cross-sectional structure along the c2-c2' direction. Figure 19 For along Figure 16 A schematic diagram of the cross-sectional structure in the c3-c3' direction.

[0156] In some embodiments, such as Figure 12 and Figure 16 As shown, the first electrode 41 includes a first conductive portion 41m and a first connecting portion 41n. The first conductive portion 41m includes a first sub-part 411 and a second sub-part 412. Based on the second electrode including a first hollow portion 42s, the second electrode 42 includes a plurality of second conductive portions 42m and a plurality of second connecting portions 42n. Adjacent second conductive portions 42m are connected through the second connecting portions 42n. The plurality of second conductive portions 42m includes a plurality of third sub-parts 421 and a plurality of fourth sub-parts 422.

[0157] The first electrode 41 includes a plurality of second cutout portions 41s, and a fourth sub-portion 422 is disposed at a position corresponding to the second cutout portion 41s. Each second cutout portion 41s corresponds to at least one fourth sub-portion 422. The orthographic projection of the fourth sub-portion 422 onto the substrate overlaps with the orthographic projection of the corresponding second cutout portion 41s onto the substrate. The orthographic projection of the third sub-portion 421 onto the substrate does not overlap with the orthographic projection of the second cutout portion 41s onto the substrate.

[0158] In this embodiment of the invention, multiple first hollow portions 42s are provided in the second electrode 42, and the first conductive portion 41m in the first electrode 41 is divided into two parts, namely a first sub-part 411 and a second sub-part 412. The first sub-part 411 is disposed adjacent to the second electrode 42, while the second sub-part 412 is disposed at the position corresponding to the first hollow portions 42s. Multiple second hollow portions 41s are provided in the first electrode 41, and the second conductive portion 42m in the second electrode 42 is divided into two parts, namely a third sub-part 421 and a fourth sub-part 422. The third sub-part 421 is disposed adjacent to the first electrode 41, while the fourth sub-part 422 is disposed at the position corresponding to the second hollow portions 41s. Based on the mutual capacitance structure formed between the first sub-part 411 and the third sub-part 421, the second sub-part 412 and the third sub-part 421, as well as the fourth sub-part 422 and the first sub-part 411, also form a mutual capacitance structure. This increases the interaction area between the first electrode 41 and the second electrode 42, and the change in the mutual capacitance value between the first electrode 41 and the second electrode 42 before and after touch increases, which is beneficial to improving the touch accuracy and touch sensitivity of the touch display panel.

[0159] In some embodiments, such as Figures 12-15 As shown, the first connecting portion 41n and the second connecting portion 42n are located in the second touch layer 4a, the first sub-part 411 and the third sub-part 421 are located in the first touch layer 4a, and the second sub-part 412 and the fourth sub-part 422 may be located in the second touch layer 4c. The first connecting portion 41n is connected to the first sub-part 411 through a via in the first insulating layer 4b, and the second connecting portion 42n is connected to the third sub-part 421 through a via in the first insulating layer 4b. In this case, the orthographic projections of the first sub-part 411 and the fourth sub-part 422 on the substrate may overlap, or they may not overlap. Similarly, the orthographic projections of the second sub-part 412 and the third sub-part 421 on the substrate may overlap, or they may not overlap.

[0160] The first sub-part 411 and the third sub-part 421 are disposed on the first touch layer 4a, and the second sub-part 412 and the fourth sub-part 422 are disposed on the second touch layer 4c. This arrangement places the first sub-part 411 and the second sub-part 412, belonging to the first electrode, on different touch layers, and the third sub-part 421 and the fourth sub-part 422, belonging to the second electrode, on different touch layers. Therefore, a first connecting portion 41n is needed between the first sub-part 411 and the second sub-part 412 through a via in the first insulating layer, and a second connecting portion 42n is needed between the third sub-part 421 and the fourth sub-part 422 through a via in the first insulating layer. However, the precision requirements for the placement of the second sub-part 412 and the fourth sub-part 422 on the second touch layer are not high, making them easy to manufacture.

[0161] In some embodiments, such as Figures 16-19 As shown, the first connecting portion 41n and the second connecting portion 42n are located in the second touch layer 4a. The first sub-part 411 and the third sub-part 421 are located in the first touch layer 4a. The second sub-part 412 and the fourth sub-part 422 may also be located in the first touch layer 4a. The first connecting portion 41n is connected to the first conductive portion 41m through a via in the first insulating layer 4b. The second connecting portion 42n is connected to the second conductive portion 42m through a via in the first insulating layer 4b. The second sub-part 412 is located within the corresponding first hollow portion 42s, and there is a gap between the second sub-part 412 and the edge of the corresponding first hollow portion 42s. The fourth sub-part 422 is located within the corresponding second hollow portion 41s, and there is a gap between the fourth sub-part 422 and the edge of the corresponding second hollow portion 41s.

[0162] By placing the first conductive portion 41m of the first electrode and the second conductive portion 42m of the second electrode both in the first touch layer, and placing the first connecting portion 41n of the first electrode and the second connecting portion 42n of the second electrode both in the second touch layer, the pattern of the second touch layer can be simplified. Since the first conductive portion 41m and the second conductive portion 42m are located in the same touch layer, a predetermined distance must be maintained between them to prevent short circuits in their electrical connection. Simultaneously, the gap between the first conductive portion 41m and the second conductive portion 42m reduces the area of ​​the touch electrode, effectively reducing the coupling area between the touch electrode and the display panel, which helps reduce noise between the touch layer and the display panel.

[0163] In some embodiments, such as Figure 12 and Figure 16As shown, a third sub-part 421 includes a first hollowed-out part 42s, and a second sub-part 412 is correspondingly provided for the first hollowed-out part 42s; a first sub-part 411 includes a second hollowed-out part 41s, and a fourth sub-part 422 is correspondingly provided for the second hollowed-out part 41s; that is, a second electrode is provided at the center of the first electrode, and a first electrode is provided at the center of the second electrode, thereby increasing the interaction area between the first electrode and the second electrode on the basis of the original structure of the first electrode and the second electrode.

[0164] For each first electrode 41, each first sub-part 411 within the same first electrode 41 is interconnected with an adjacent second sub-part 412 on the same side of the second direction y via a first connecting part 41n. For each second electrode 42, each third sub-part 421 within the same second electrode 42 is interconnected with an adjacent fourth sub-part 422 on the same side of the first direction x via a second connecting part 42n. Figure 12 and Figure 16 For example, the first sub-section 411 of each row is connected to the second sub-section 412 of the row below via the first connecting part 41n, and the third sub-section 421 of each column is connected to the fourth sub-section 422 of the column on the right via the second connecting part 42n. This increases the interaction area between the first electrode and the second electrode while ensuring that the first electrode and the second electrode have a sufficient number and structural consistency.

[0165] Figure 20 This is the seventh schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 21 For along Figure 20 A schematic diagram of the cross-sectional structure in the d1-d1' direction. Figure 20 For the cross-sectional structure in the d2-d2' direction, please refer to Figure 14 , Figure 20 For the cross-sectional structure in the d3-d3' direction, please refer to Figure 15 .

[0166] Figure 22 This is the eighth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 23 For along Figure 22 A schematic diagram of the cross-sectional structure in the d1-d1' direction. Figure 23 For the cross-sectional structure in the d2-d2' direction, please refer to Figure 18 , Figure 22 For the cross-sectional structure in the d3-d3' direction, please refer to Figure 19 .

[0167] In some embodiments, such as Figures 20-23As shown, the first connecting portion 41n includes a first sub-connecting portion 41n1 and a third sub-connecting portion 41n2; wherein, the first sub-connecting portion 41n1 is used to connect adjacent first sub-parts 411 and second sub-parts 412, and the third sub-connecting portion 41n2 is used to connect adjacent first sub-parts 411, thereby improving the connection stability between each first conductive portion 41m in the first electrode 41 and avoiding open circuits between the first conductive portions 41m.

[0168] As can be seen from the above embodiments, the first sub-connection portion 41n1 in this embodiment is equivalent to the first connection portion 41n in the above embodiments. Therefore, the first sub-connection portion 41n1 is usually located in the second touch layer 4c, such as... Figure 21 and Figure 23 As shown, the third sub-connection portion 41n2 can also be located in the second touch layer 4c. In this case, the first sub-connection portion 41n1 is connected to the adjacent first sub-part 411 and second sub-part 412 through the via of the first insulating layer 4b, and the third sub-connection portion 41n2 is connected to the adjacent first sub-part 411 through the via of the first insulating layer 4b.

[0169] Optionally, the first sub-connection portion 41n1 can be located in the second touch layer 4c, and the third sub-connection portion 41n2 can be located in the first touch layer 4a. In this case, the first sub-connection portion 41n1 connects the adjacent first sub-part 411 and second sub-part 412 through the through-hole of the first insulating layer 4b. When the first touch layer 4a is patterned, the third sub-connection portion 41n2 is formed together with the first sub-part 411, thereby connecting the adjacent first sub-parts 411.

[0170] Figure 24 This is the ninth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 25 For along Figure 24 A schematic diagram of the cross-sectional structure in the direction of e1-e1'. Figure 24 For the cross-sectional structure in the e2-e2' direction, please refer to Figure 14 , Figure 24 For the cross-sectional structure in the e3-e3' direction, please refer to Figure 15 .

[0171] Figure 26 This is the tenth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 27 For along Figure 26 A schematic diagram of the cross-sectional structure in the direction of e1-e1'. Figure 26 For the cross-sectional structure in the e2-e2' direction, please refer to Figure 18 , Figure 26 For the cross-sectional structure in the e3-e3' direction, please refer to Figure 19 .

[0172] In some embodiments, such as Figures 24-27As shown, the second connection portion 42n includes a second sub-connection portion 42n1 and a fourth sub-connection portion 42n2; wherein, the second sub-connection portion 42n1 is used to connect adjacent third sub-parts 421 and fourth sub-parts 422, and the fourth sub-connection portion 42n2 is used to connect adjacent third sub-parts 421, thereby improving the connection stability between each second conductive portion 42m in the second electrode 42 and avoiding open circuits between the second conductive portions 42m.

[0173] As can be seen from the above embodiments, the second sub-connection portion 42n1 in this embodiment is equivalent to the second connection portion 42n in the above embodiments. Therefore, the second sub-connection portion 42n1 is usually located in the second touch layer 4c, such as... Figure 25 and Figure 27 As shown, the fourth sub-connection portion 42n2 is located in the first touch layer 4a. The second sub-connection portion 42n1 connects the adjacent third sub-part 421 and the fourth sub-part 422 through the through-hole of the first insulating layer 4b. When the first touch layer is patterned, the fourth sub-connection portion 42n2 is formed together with the third sub-part 421, thereby connecting the adjacent third sub-part 421.

[0174] Optionally, the second sub-connection portion 42n1 and the fourth sub-connection portion 42n2 can both be located in the second touch layer 4c. In this case, the second sub-connection portion 42n1 is connected to the adjacent third sub-part 421 and the fourth sub-part 422 through the through hole of the first insulating layer 4b, and the fourth sub-connection portion 42n2 is connected to the adjacent third sub-part 421 through the through hole of the first insulating layer 4b.

[0175] Figure 28 This is eleventh of the schematic diagrams of the planar structure of the touch layer provided in the embodiments of the present invention. Figure 29 For along Figure 28 A schematic diagram of the cross-sectional structure in the f1-f1' direction. Figure 28 For the cross-sectional structure in the f2-f2' direction, please refer to Figure 14 , Figure 28 For the cross-sectional structure in the f3-f3' direction, please refer to Figure 15 .

[0176] Figure 30 This is the twelfth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 31 For along Figure 30 A schematic diagram of the cross-sectional structure in the f1-f1' direction. Figure 30 For the cross-sectional structure in the f2-f2' direction, please refer to Figure 18 , Figure 30 For the cross-sectional structure in the f3-f3' direction, please refer to Figure 19 .

[0177] In some embodiments, such as Figures 28-31As shown, the first connecting portion 41n includes a first sub-connecting portion 41n1 and a third sub-connecting portion 41n2, while the second connecting portion 42n includes a second sub-connecting portion 42n1 and a fourth sub-connecting portion 42n2. The first sub-connecting portion 41n1 connects adjacent first and second sub-sub-parts, the third sub-connecting portion 41n2 connects adjacent first sub-sub-parts, the second sub-connecting portion 42n1 connects adjacent third and fourth sub-sub-parts, and the fourth sub-connecting portion 42n2 connects adjacent third sub-sub-parts. Figure 28 and Figure 30 It can be seen that the orthographic projection of the third sub-connection portion 41n2 onto the substrate and the orthographic projection of the fourth sub-connection portion 42n2 onto the substrate have an overlapping area. To avoid electrical connection between the two, the third sub-connection portion 41n2 and the fourth sub-connection portion 42n2 can be respectively disposed in two touch layers. Figure 29 and Figure 31 For example, the third sub-connection portion 41n2 can be disposed in the second touch layer 4c, and the fourth sub-connection portion 42n2 can be disposed in the first touch layer 4a. Alternatively, the third sub-connection portion 41n2 can be disposed in the first touch layer 4a, and the fourth sub-connection portion 42n2 can be disposed in the second touch layer 4c. By simultaneously disposing of the first sub-connection portion 41n1, the second sub-connection portion 42n1, the third sub-connection portion 41n2, and the fourth sub-connection portion 42n2, the connection stability of the first conductive portion 41m in the first electrode and the connection stability of the second conductive portion 42m in the second electrode can be ensured at the same time.

[0178] It is worth noting that, Figures 12 to 31 The embodiments shown are illustrated with the first touch layer 4a located on the side closer to the light-emitting device and the second touch layer 4c located on the side farther away from the light-emitting device. In actual implementation, the positions of the first touch layer 4a and the second touch layer 4c can be interchanged, and the touch patterns included in the first touch layer 4a and the touch patterns included in the second touch layer 4c can be interchanged accordingly. No limitation is made here.

[0179] Figure 32 This is the thirteenth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 33 This is the fourteenth schematic diagram of the planar structure of the touch layer provided in the embodiment of the present invention. Figure 34 For along Figure 32 A schematic diagram of the cross-sectional structure in the g1-g1' direction. Figure 35 For along Figure 32 A schematic diagram of the cross-sectional structure along the g2-g2' direction. Figure 36 For along Figure 32 A schematic diagram of the cross-sectional structure in the g3-g3' direction. Figure 37 For along Figure 33 A schematic diagram of the cross-sectional structure in the g1-g1' direction. Figure 38 For along Figure 33 A schematic diagram of the cross-sectional structure along the g2-g2' direction. Figure 39 For along Figure 33 A schematic diagram of the cross-sectional structure in the g3-g3' direction.

[0180] In some embodiments, the first electrode and the second electrode may also include different numbers of cutouts, so as to Figure 32 and Figure 33 Taking the structure shown as an example, a third sub-part 421 includes two first hollowed-out portions 42s, and each first hollowed-out portion 42s corresponds to a second sub-part 412; a first sub-part 411 includes a second hollowed-out portion 41s, and each second hollowed-out portion 41s corresponds to a fourth sub-part 422. By providing more than one first hollowed-out portion 42s in a third sub-part 421, and providing a second sub-part 412 in each first hollowed-out portion 42s, the interaction area between the first electrode and the second electrode can be further increased. This embodiment of the invention only illustrates the example of providing two first hollowed-out portions 42s. In specific implementations, more first hollowed-out portions 42s can be provided, or more than one second hollowed-out portion 41s can be provided; this is not limited here.

[0181] For each first electrode 41, each first sub-part 411 within the same first electrode 41 is interconnected with adjacent second sub-parts 412 on both sides of the second direction y via a first connecting part 41n, thereby forming an axisymmetric structure for the first electrode 41. For each second electrode 42, each third sub-part 421 within the same second electrode 42 is interconnected with adjacent fourth sub-parts 422 on the same side of the first direction x via a second connecting part 42n. Figure 32 and Figure 33 For example, the first sub-section 411 of each row is connected to the second sub-sections 412 of the two rows located on the top and bottom sides via the first connecting part 41n, and the third sub-section 421 of each column is connected to the fourth sub-section 422 of the column located on the right side via the second connecting part 42n. This can increase the interaction area between the first electrode and the second electrode while ensuring that the first electrode and the second electrode have a sufficient number and structural consistency.

[0182] In some embodiments, such as Figures 34-36As shown, the first sub-part 411 of the first electrode and the third sub-part 421 of the second electrode are located in the first touch layer 4a; the second sub-part 412 and the first connecting part 41n of the first electrode are located in the second touch layer 4c, and the fourth sub-part 422 and the second connecting part 42n of the second electrode are located in the second touch layer 4c. The first connecting part 41n is connected to the first sub-part 411 through a via in the first insulating layer 4b, and the second connecting part 42b is connected to the third sub-part 421 through a via in the first insulating layer 4b. At this time, the orthographic projection of the first sub-part 411 on the substrate and the orthographic projection of the fourth sub-part 422 on the substrate may have an overlapping area, or the orthographic projection of the first sub-part 411 on the substrate and the orthographic projection of the fourth sub-part 422 on the substrate may not have an overlapping area. Similarly, the orthographic projection of the second sub-part 412 onto the substrate and the orthographic projection of the third sub-part 421 onto the substrate may overlap, or there may be no overlap between the orthographic projection of the second sub-part 412 onto the substrate and the orthographic projection of the third sub-part 421 onto the substrate.

[0183] The first sub-part 411 and the third sub-part 421 are disposed on the first touch layer 4a, and the second sub-part 412 and the fourth sub-part 422 are disposed on the second touch layer 4c. This arrangement places the first sub-part 411 and the second sub-part 412, belonging to the first electrode, on different touch layers, and the third sub-part 421 and the fourth sub-part 422, belonging to the second electrode, on different touch layers. Therefore, a first connecting portion 41n is needed between the first sub-part 411 and the second sub-part 412 through a via in the first insulating layer, and a second connecting portion 42n is needed between the third sub-part 421 and the fourth sub-part 422 through a via in the first insulating layer. However, the precision requirements for the placement of the second sub-part 412 and the fourth sub-part 422 on the second touch layer are not high, making them easy to manufacture.

[0184] In some embodiments, such as Figures 37-39 As shown, the first sub-part 411 and the second sub-part 412 of the first electrode, and the third sub-part 421 and the fourth sub-part 422 of the second electrode are all located in the first touch layer 4a; the first connecting part 41n of the first electrode and the second connecting part 42n of the second electrode are located in the second touch layer 4c. The first connecting part 41n is connected to the first conductive part 41m through a through-hole in the first insulating layer 4b, and the second connecting part 42n is connected to the second conductive part 42m through a through-hole in the first insulating layer 4b. The second sub-part 412 is located within the corresponding first hollow part 42s, and there is a gap between the second sub-part 412 and the edge of the corresponding first hollow part 42s; the fourth sub-part 422 is located within the corresponding second hollow part 41s, and there is a gap between the fourth sub-part 422 and the edge of the corresponding second hollow part 41s.

[0185] By placing the first conductive portion 41m of the first electrode and the second conductive portion 42m of the second electrode both in the first touch layer, and placing the first connecting portion 41n of the first electrode and the second connecting portion 42n of the second electrode both in the second touch layer, the pattern of the second touch layer can be simplified. Since the first conductive portion 41m and the second conductive portion 42m are located in the same touch layer, a predetermined distance must be maintained between them to prevent short circuits in their electrical connection. Simultaneously, the gap between the first conductive portion 41m and the second conductive portion 42m reduces the area of ​​the touch electrode, effectively reducing the coupling area between the touch electrode and the display panel, which helps reduce noise between the touch layer and the display panel.

[0186] In some embodiments, such as Figures 32-39 As shown, the second connection portion 42n may include a second sub-connection portion 42n1 and a fourth sub-connection portion 42n2; the second sub-connection portion 42n1 is used to connect adjacent third sub-parts 421 and fourth sub-parts 422, and the fourth sub-connection portion 42n2 is used to connect adjacent third sub-parts 421, thereby improving the connection stability between each second conductive portion 42m in the second electrode 42 and avoiding open circuits between the second conductive portions 42m.

[0187] Referring to the above embodiments, it can be seen that the second sub-connection portion 42n1 in this embodiment is equivalent to the second connection portion 42n in the above embodiments. Therefore, the second sub-connection portion 42n1 is usually located in the second touch layer 4c, while the fourth sub-connection portion 42n2 is located in the first touch layer 4a. The second sub-connection portion 42n1 connects the adjacent third sub-part 421 and the fourth sub-part 422 through the vias of the first insulating layer 4b. When the first touch layer is patterned, the fourth sub-connection portion 42n2 is formed together with the third sub-part 421, thereby connecting the adjacent third sub-part 421.

[0188] like Figure 32 and Figure 33 As shown, the width of the third sub-part 421 along the first direction x is greater than the width of the fourth sub-connecting part 42n2 along the first direction x, so that the fourth sub-connecting part 42n2 and the two connected third sub-parts 421 form a recessed structure; at this time, protruding structures can be provided on both sides of the first sub-part 411 along the first direction x, so that the protruding structures and the recessed structures are interlocked, thereby further increasing the interaction area between the first electrode and the second electrode.

[0189] It should be noted that, Figures 32-39The embodiments shown are illustrated with the first touch layer 4a located on the side closer to the light-emitting device and the second touch layer 4c located on the side farther away from the light-emitting device. In actual implementation, the positions of the first touch layer 4a and the second touch layer 4c can be interchanged, and the touch patterns included in the first touch layer 4a and the touch patterns included in the second touch layer 4c can be interchanged accordingly. No limitation is made here.

[0190] The above embodiments provided by the present invention are only used to illustrate the concept of the present invention. In practical applications, different structures can be designed to increase the interaction area between the first electrode and the second electrode, thereby increasing the change in the mutual capacitance value between the first electrode and the second electrode before and after touch, that is, increasing the amount of touch signal, which is beneficial to improving the touch accuracy and touch sensitivity of the touch display panel.

[0191] Based on the same inventive concept, embodiments of the present invention also provide a display device, which includes any of the aforementioned display panels. Other essential components of this display device are readily understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the present invention. This display device can be applied to automotive, notebook, mobile phone, wearable, and other application fields. Since the principle by which this display device solves the problem is similar to that of the aforementioned display panels, the implementation of this display device can refer to the implementation of the aforementioned display panels, and repeated details will not be elaborated upon.

[0192] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0193] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A display panel, characterized in that, include: Substrate; The driving layer is located on the substrate. The light-emitting device layer is located on the side of the driving layer opposite to the substrate. and The touch layer is located on the side of the light-emitting device layer away from the driving layer, and includes a first touch layer, a second touch layer and a first insulating layer stacked together, wherein the first insulating layer is located between the first touch layer and the second touch layer; The touch layer includes: a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes are insulated from each other; the plurality of first electrodes extend along a first direction and are arranged along a second direction; the plurality of second electrodes extend along the second direction and are arranged along the first direction; the first direction and the second direction intersect. The first electrode includes a plurality of first conductive portions and a plurality of first connecting portions, with adjacent first conductive portions connected through the first connecting portions; the plurality of first conductive portions include a plurality of first sub-parts and a plurality of second sub-parts; the second electrode includes a plurality of first hollow portions; the second sub-parts are disposed at positions corresponding to the first hollow portions, with one first hollow portion corresponding to at least one second sub-part, and the orthographic projection of the second sub-part on the substrate and the orthographic projection of the corresponding first hollow portion on the substrate having an overlapping area; the orthographic projection of the first sub-part on the substrate and the orthographic projection of the first hollow portion on the substrate do not overlap; the first sub-part is connected to two adjacent rows of second sub-parts in the first direction only through the first connecting portions; The second electrode comprises three second conductive portions and multiple second connecting portions. When one first hollow portion corresponds to two second sub-parts, adjacent second conductive portions are connected through the second connecting portions. The three second conductive portions are arranged along the first direction and extend along the second direction. Adjacent second conductive portions are connected through multiple second connecting portions. Each second conductive portion and each second connecting portion forms the multiple first hollow portions. Multiple first sub-parts arranged along the second direction are provided between adjacent second electrodes. The first electrode comprises multiple first sub-parts and multiple groups of second sub-parts arranged alternately along the first direction. Each group of second sub-parts comprises four second sub-parts, which are arranged in two rows and two columns along the first and second directions. Two adjacent second sub-parts in the same group of second sub-parts along the first direction are connected to each other through the first connecting portions. The width of the first sub-part along the second direction is greater than the width of the second sub-part along the second direction. One first sub-part corresponds to two rows of second sub-parts, and both rows of second sub-parts are connected to adjacent first sub-parts.

2. The display panel as described in claim 1, characterized in that, The second electrode is located in the first touch layer, and the first electrode is located in the second touch layer; there may or may not be an overlapping area between the orthographic projection of the first conductive portion on the substrate and the orthographic projection of the second electrode on the substrate; Alternatively, the second electrode and the first conductive part are located in the first touch layer, the first connecting part is located in the second touch layer, and the first connecting part is connected to the first conductive part through a through hole in the first insulating layer; there is a gap between the first sub-part and the adjacent second electrode, the second sub-part is located in the corresponding first hollow part, and there is a gap between the second sub-part and the edge of the corresponding first hollow part.

3. The display panel as described in claim 1 or 2, characterized in that, The first electrode is a touch driving electrode, and the second electrode is a touch sensing electrode; or, the first electrode is a touch sensing electrode, and the second electrode is a touch driving electrode.

4. The display panel as described in claim 1 or 2, characterized in that, The display panel also includes: An encapsulation layer covers the side of the light-emitting device layer that is opposite to the driving layer; The touch layer is located on the side of the encapsulation layer opposite to the light-emitting device layer.

5. The display panel as described in claim 4, characterized in that, The encapsulation layer includes at least: A first inorganic layer covers the side of the light-emitting device layer that is away from the driving layer; The first organic layer is located on the side of the first inorganic layer that is away from the light-emitting device layer; The second inorganic layer is located on the side of the first organic layer that is opposite to the first inorganic layer.

6. The display panel as described in claim 1 or 2, characterized in that, The first touch layer is located on the side close to the light-emitting device layer, and the second touch layer is located on the side of the first touch layer away from the light-emitting device layer; Alternatively, the second touch layer is located on the side closer to the light-emitting device layer, and the first touch layer is located on the side of the second touch layer away from the light-emitting device layer.

7. The display panel as described in claim 6, characterized in that, The touch layer further includes a buffer layer and a second insulating layer; the buffer layer is the outermost film layer of the touch layer facing the light-emitting device layer, and the second insulating layer is the outermost film layer of the touch layer away from the light-emitting device layer.

8. The display panel as described in claim 1 or 2, characterized in that, The first touch layer and the second touch layer are made of metal mesh.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 8.

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