Display panel and display device

Abstract

The invention provides a display panel. The display panel comprises a display substrate, a touch function layer and an excitation structure, wherein the touch function layer and the excitation structure are located on the display substrate. The display substrate comprises a plurality of light-emitting devices, the light-emitting devices are located in the display area and comprise first electrodes, the touch function layer is located in the display area, and at least part of the excitation structure and the first electrodes are arranged on the same layer. At least part of the excitation structure and the first electrode are prepared on the same layer, the preparation process of the excitation structure can be simplified, and at least part of the excitation structure can be located in the display area to reduce the frame width of the display panel, so that the frame ultra-narrow design of the display panel is facilitated.

Description

Technical Field

[0001] The present disclosure relates to the field of display, and in particular, to a display panel and a display device. Background Art

[0002] With the rapid development of science and technology, stylus pens have come into the public eye, such as capacitive pens and electromagnetic pens. The touch operation of the stylus on the touch screen can achieve better accuracy and resolution, thereby realizing some complex touch operations.

[0003] The current touch screen is designed ahead of its own structure, and it is difficult to further reduce the border width of the touch screen when it is used in a scene where a stylus is touched. In addition, it is difficult to further reduce the thickness of the touch screen, which makes it difficult to bend. Summary of the invention

[0004] The first aspect of the present disclosure provides a display panel, which includes a display substrate and a touch function layer and an excitation structure located on the display substrate. The display substrate includes a plurality of light-emitting devices, the light-emitting devices are located in a display area and include a first electrode, the touch function layer is located in the display area, and at least part of the excitation structure is arranged in the same layer as the first electrode.

[0005] In the above scheme, at least part of the excitation structure is prepared in the same layer as the first electrode, which can simplify the preparation process of the excitation structure and enable at least part of the excitation structure to be located in the display area to reduce the border width of the display panel, thereby facilitating the design of an extremely narrow border of the display panel.

[0006] In a specific implementation of the first aspect of the present disclosure, the touch function layer includes a first electrode structure and a second electrode structure, and an orthographic projection of the first electrode structure on the display substrate intersects with an orthographic projection of the second electrode structure on the display substrate.

[0007] Optionally, a portion of the excitation structure that is in the same layer as the first electrode is made of the same material as the first electrode.

[0008] In a specific embodiment of the first aspect of the present disclosure, at least a portion of the excitation structure is located in the display area, and the portion of the excitation structure located in the display area is a grid structure, and the orthographic projection of the grid lines of the grid structure on the surface where the display substrate is located is within the orthographic projection of the gap between adjacent first electrodes on the surface where the display substrate is located.

[0009] Optionally, the excitation structure is located in the display area, and at least a portion of an outer edge of the excitation structure coincides with at least a portion of an outer edge of the display area.

[0010] Optionally, the display substrate further includes a non-display area surrounding the display area, a portion of the excitation structure is located in the display area, and another portion of the excitation structure is located in the non-display area.

[0011] In a specific embodiment of the first aspect of the present disclosure, the excitation structure includes a coil portion and a dummy portion, the coil portion is distributed along the edge of the display area and surrounds at least part of the dummy portion, and the coil portion is spaced from the dummy portion. The dummy portion can be provided to offset the difference in light transmittance of the display area caused by the provision of the coil portion.

[0012] Optionally, the coil part and the dummy part are in the same layer and made of the same material as the first electrode, thereby simplifying the preparation process of the excitation structure and controlling the preparation cost of the display panel.

[0013] In another specific embodiment of the first aspect of the present disclosure, the excitation structure includes a coil part and a dummy part, the coil part is distributed along the edge of the display area and surrounds at least part of the dummy part, the coil part is spaced apart from the dummy part, the coil part includes a first part, a second part and a third part which are connected end to end in sequence, the first part, the second part and the third part are respectively located on different sides of the display area, the first part, the third part and the dummy part are in the same layer and made of the same material, and the second part is in a different layer from the first part.

[0014] Optionally, the display substrate includes a pixel driving circuit located in the display area, the pixel driving circuit includes a thin film transistor and a signal line, and the second part is in the same layer and made of the same material as the conductive structure or the signal line in the thin film transistor.

[0015] In another specific embodiment of the first aspect of the present disclosure, the excitation structure includes a sub-coil and a connecting structure, the sub-coil is configured as at least two turns of coil arranged from the inside to the outside, one end of the connecting structure is connected to the inner end of the coil, and the other end is located on the outside of the coil to span the coil.

[0016] In another specific embodiment of the first aspect of the present disclosure, the excitation structure includes a first coil electrode and a plurality of parallel second coil electrodes, the extension direction of the first coil electrode intersects with the extension direction of the second coil electrode, the second coil electrodes are spaced apart from each other, and one end on the same side of each second coil electrode is connected to the first coil electrode, and the end on the other side of each second coil electrode is a free end.

[0017] In another specific embodiment of the first aspect of the present disclosure, the excitation structure includes a plurality of sub-coils spaced apart from each other, each sub-coil includes at least one first coil electrode and at least two second coil electrodes, in each sub-coil, the second coil electrode is connected through the first coil electrode, and the second coil electrodes of each sub-coil are arranged in parallel.

[0018] In a specific embodiment of the first aspect of the present disclosure, the first electrode structure includes a plurality of first coils arranged in parallel, and the second electrode structure includes a plurality of second coils arranged in parallel, and the first coils and the second coils intersect with each other.

[0019] Optionally, at least part of the excitation structure is distributed along an edge of the display area.

[0020] In a specific embodiment of the first aspect of the present disclosure, the touch function layer includes a plurality of parallel first touch electrodes, a plurality of first signal lines, a plurality of second signal lines, a plurality of parallel second touch electrodes, a plurality of third signal lines, and a plurality of fourth signal lines. Each first coil includes at least one first touch electrode, the first signal line and the second signal line are connected to the first touch electrode, and each first coil includes a first signal line and a second signal line, each second coil includes at least one second touch electrode, the orthographic projection of the first touch electrode on the display substrate intersects with the orthographic projection of the second touch electrode on the display substrate, the third signal line and the fourth signal line are connected to the second touch electrode, and each second coil includes a third signal line and a fourth signal line.

[0021] In the above scheme, the intersection of the orthographic projections of the first touch electrode and the second touch electrode on the display substrate can form a touch capacitor. Therefore, by controlling the first signal line, the second signal line, the third signal line and the fourth signal line, the touch function layer can be switched between the touch function (capacitive touch, such as the touch position of a finger) and the electromagnetic induction function (such as sensing the position of a stylus).

[0022] In a specific embodiment of the first aspect of the present disclosure, the first coil includes a first touch electrode, a first signal line and a second signal line, and in each of the first coils, the first signal line and the second signal line are respectively connected to the two ends of the first touch electrode; and / or, the second coil includes a second touch electrode, a third signal line and a fourth signal line, and in each of the second coils, the third signal line and the fourth signal line are respectively connected to the two ends of the first touch electrode.

[0023] In a specific embodiment of the first aspect of the present disclosure, the first coil includes at least two first touch electrodes, a first signal line and a second signal line, in each of the first coils, the first touch electrodes are connected end to end to each other, and the first signal line and the second signal line are respectively connected to the two ends of the two first touch electrodes that are not connected to the adjacent first touch electrodes; and / or, the second coil includes at least two second touch electrodes, a third signal line and a fourth signal line, in each of the second coils, the second touch electrodes are connected end to end to each other, and the third signal line and the fourth signal line are respectively connected to the two ends of the first touch electrodes that are not connected to the adjacent second touch electrodes.

[0024] In a specific embodiment of the first aspect of the present disclosure, the first touch electrode includes a plurality of first touch electrode blocks and a plurality of first connecting portions, in each of the first touch electrodes, the first touch electrode blocks are connected to each other through the first connecting portions, the second touch electrode includes a plurality of second touch electrode blocks and a plurality of second connecting portions, in each of the second touch electrodes, the second touch electrode blocks are connected to each other through the second connecting portions, and the orthographic projections of the first connecting portions on the display substrate and the orthographic projections of the second connecting portions on the display substrate intersect with each other.

[0025] Optionally, the first touch electrode block and the second touch electrode block are in the same layer and made of the same material, one of the first connecting portion and the second connecting portion is in the same layer and made of the same material as the first touch electrode block, and the other of the first connecting portion and the second connecting portion is a conductive bridge.

[0026] A second aspect of the present disclosure provides a display device, which includes the display panel in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a planar structure of a display panel is disclosed in accordance with an embodiment.

[0028] Figure 2 for Figure 1 A schematic diagram of the planar structure of the excitation structure of the display panel is shown.

[0029] Figure 3 for Figure 1 A cross-sectional view of a partial area of ​​a display panel is shown.

[0030] Figure 4 for Figure 1 An enlarged view of the structure of the touch function layer in the display panel is shown.

[0031] Figure 5 for Figure 4 An enlarged view of a touch unit of the display panel is shown.

[0032] Fig. 6A for Figure 5 The touch unit is shown in a cross-sectional view along M1-N1;

[0033] Figure 6B for Figure 5 The touch unit is shown in a cross-sectional view along M2-N2;

[0034] Figure 7 for Figure 5 An enlarged view of the S1 region in the display panel is shown.

[0035] Figure 8 A schematic diagram of the planar structure of another display panel provided to disclose an embodiment.

[0036] Fig. 9 A schematic plan view of the structure of another excitation structure of a display panel provided to disclose an embodiment.

[0037] Fig.10 A schematic plan view of the structure of another excitation structure of a display panel provided to disclose an embodiment.

[0038] Fig.11 A schematic plan view of the structure of another excitation structure of a display panel provided to disclose an embodiment.

[0039] Fig.12 A schematic plan view of the structure of another excitation structure of a display panel provided to disclose an embodiment.

[0040] Fig.13 A schematic plan view of the structure of another excitation structure of a display panel provided to disclose an embodiment.

[0041] Description of reference numerals:

[0042] 10-display substrate; 11-display area; 12-non-display area;

[0043] 100-substrate; 110-thin film transistor; 120-signal line;

[0044] 200-light-emitting device; 210-first electrode; 220-light-emitting functional layer; 230-second electrode;

[0045] 300-touch function layer; 31-first electrode structure; 301-first coil; 32-second electrode structure; 302-second coil; 310-first touch electrode; 311-first touch electrode block; 312-first connecting portion; 320-second touch electrode; 321-second touch electrode block; 322-second connecting portion; 331-first signal line; 332-second signal line; 333-third signal line; 334-fourth signal line;

[0046] 400 - excitation structure; 410 - coil part; 411 - first part; 412 - second part; 413 - third part; 420 - dummy part; 431 - sub-coil; 432 - connection structure; 441 - first coil electrode; 442 - second coil electrode.

[0047] 500 - packaging structure; 510 - first packaging layer; 520 - second packaging layer; 530 - third packaging layer. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0049] The electromagnetic pen has high precision, high pressure sensitivity, good linearity, strong performance and few components, making it an ideal stylus. However, the touch display panel corresponding to the electromagnetic pen needs to have an electromagnetic induction function to detect the touch position of the electromagnetic pen, which will increase the complexity of the structure of the touch display panel, which is not conducive to simplifying the preparation process of the touch display panel, reducing the border of the touch display panel and reducing the thickness of the touch display panel to increase its bending ability.

[0050] At least one embodiment of the present disclosure provides a display panel and a display device to at least solve the above-mentioned technical problems. The display panel includes a display substrate and a touch function layer and an excitation structure located on the display substrate. The display substrate includes a plurality of light-emitting devices, the light-emitting devices are located in a display area and include a first electrode, the touch function layer is located in the display area, and at least a portion of the excitation structure is arranged in the same layer as the first electrode. In the display panel, at least a portion of the excitation structure is prepared in the same layer as the first electrode, which can simplify the preparation process of the excitation structure, and can allow at least a portion of the excitation structure to be located in the display area to reduce the border width of the display panel, thereby facilitating the design of an extremely narrow border of the display panel.

[0051] In the following, the structure of the display panel and the display device in at least one embodiment of the present disclosure is described in conjunction with the accompanying drawings. In addition, in these drawings, a spatial rectangular coordinate system is established with reference to the display substrate of the display panel (or the substrate included therein) to describe the position of the structure in the display panel. In the spatial rectangular coordinate system, the X-axis and the Y-axis are parallel to the surface where the display substrate is located, and the Z-axis is perpendicular to the surface where the display substrate is located.

[0052] like Figures 1 to 3 As shown, the display panel includes a display substrate 10 and a touch function layer 300 and an excitation structure 400 located on the display substrate 10 .

[0053] The display substrate 10 includes a display area 11 and a non-display area 12 (including a frame) surrounding the display area 11. The display substrate 10 includes a substrate 100 and a plurality of sub-pixels (such as the following) located on the substrate 100. Figure 7The sub-pixel is located in the display area 11 and its physical structure is a light-emitting device 200, which includes a first electrode 210, a light-emitting functional layer 220, and a second electrode 230 stacked on the substrate 100. The light-emitting device 200 can emit light of different colors according to different types of the light-emitting functional layer 220. For example, the first electrode 210 can be an anode, and the second electrode 230 can be a cathode.

[0054] The touch function layer 300 is located in the display area 11 to cooperate with the excitation structure 400 to achieve electromagnetic induction to determine the touch position of the stylus, and at least part of the excitation structure 400 is arranged in the same layer as the first electrode 210. In this way, at least part of the excitation structure 400 is prepared in the same layer as the first electrode 210, which can simplify the preparation process of the excitation structure 400, that is, the setting of the excitation structure 400 will not increase the preparation process flow of the display panel (for example, the number of steps in the composition process), and each first electrode 210 needs to be distributed at intervals, so the gap between the first electrodes 210 can provide a layout space for the excitation structure 400, so that at least part of the excitation structure 400 can be distributed in the display area 11 to reduce the border width of the display panel, which is conducive to the extremely narrow border design of the display panel.

[0055] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, the touch function layer 300 may include a first electrode structure 31 and a second electrode structure 32, and the orthographic projection of the first electrode structure 31 on the substrate 100 (equivalent to the surface where the display substrate is located) and the orthographic projection of the second electrode structure 32 on the substrate 100 (equivalent to the surface where the display substrate is located) intersect each other, so that the excitation structure 400 cooperates with the first electrode structure 31 and the second electrode structure 32, thereby having an electromagnetic touch function. Specifically, the excitation structure 400 is a transmitting coil that transmits electromagnetic waves to the stylus, that is, the excitation structure 400 provides an excitation signal. When the excitation signal stops, the oscillation circuit in the stylus resonates and outputs a resonant signal to the display panel. The first electrode structure 31 and the second electrode structure 32 generate an induction receiving signal according to the resonant signal of the stylus, so that the touch data of the stylus can be determined to determine the touch position.

[0056] It should be noted that, in the embodiments of the present disclosure, “same layer and same material” means that two objects are formed from one film layer through a patterning process.

[0057] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, at least part of the excitation structure 400 is distributed along the edge of the display area 11 , thereby increasing the arrangement space of the excitation structure 400 (increasing the coverage of the excitation signal).

[0058] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, the first electrode structure 31 includes a plurality of first coils 301 arranged in parallel, and the second electrode structure 32 includes a plurality of second coils 302 arranged in parallel, and the first coils 301 and the second coils 302 intersect each other. For example, the first coils 301 extend along a first direction (assuming the X-axis direction) and are arranged along a second direction (assuming the Y-axis direction), so that the touch position of the stylus in the Y-axis direction can be detected, and the second coils 302 extend along the second direction and are arranged along the first direction, so that the touch position of the stylus in the X-axis direction can be detected. In this way, the coordinates of the stylus in the plane rectangular coordinate system established by the X-axis and the Y-axis can be determined to determine the touch position of the stylus.

[0059] In at least one embodiment of the present disclosure, Figures 1 to 5 As shown, the touch function layer 300 includes a plurality of parallel first touch electrodes 310, a plurality of first signal lines 331, a plurality of second signal lines 332, a plurality of parallel second touch electrodes 320, a plurality of third signal lines 333, and a plurality of fourth signal lines 334. Each first coil 301 includes a first signal line 331, a second signal line 332, and at least one first touch electrode 310, the first signal line 331 and the second signal line 332 are connected to the first touch electrode 310, each second coil 302 includes a third signal line 333, a fourth signal line 334, and at least one second touch electrode 320, the third signal line 333 and the fourth signal line 334 are connected to the second touch electrode 320, and the orthographic projection of the first touch electrode 310 on the substrate 100 intersects with the orthographic projection of the second touch electrode 320 on the substrate 100. The intersection of the orthographic projections of the first touch electrode 310 and the second touch electrode 320 on the display substrate can form a touch capacitor. Therefore, by controlling the first signal line 331, the second signal line 332, the third signal line 333 and the fourth signal line 334, the touch function layer 300 can be switched between the touch function (capacitive touch, such as the touch position of a finger; or, the touch position of a capacitive stylus) and the electromagnetic induction function (such as sensing the touch position of an electromagnetic stylus), that is, the first touch electrode 310 and the second touch electrode 320 are actually multiplexed as electrodes for capacitive touch and electrodes for electromagnetic induction, thereby integrating capacitive touch and electromagnetic induction touch. In this way, there is no need to separately prepare a capacitive touch structure (which can be called a touch panel) and an electromagnetic induction touch structure (a substrate structure where the electromagnetic induction coil is located). In the preparation process of the display panel, there is no need to separately bond the capacitive touch structure and the electromagnetic induction touch structure for assembly. This can also reduce the overall thickness of the display panel, which is beneficial to making the display panel lighter and thinner and reducing production costs.

[0060] For example, when the first signal line 331, the second signal line 332, the third signal line 333 and the fourth signal line 334 are all turned on, the functions of the first coil 301 and the second coil 302 are turned on, so that electromagnetic induction can be performed to detect the touch position of the electromagnetic stylus. When one of the first signal line 331 and the second signal line 332 is turned on (the other side can be disconnected or both are applied with a driving signal), and one of the third signal line 333 and the fourth signal line 334 is turned on (the other side can be disconnected or both are applied with a driving signal or a sensing signal), the capacitance of the touch capacitor formed by the intersecting part of the orthographic projections of the first touch electrode 310 and the second touch electrode 320 on the substrate 100 can be detected to detect the touch position of the capacitive stylus or finger.

[0061] In the embodiment of the present disclosure, there is no limitation on the structure of the first touch electrode 310 and the second touch electrode 320 intersecting each other, and the structure can be designed according to the actual process requirements. Below, only an illustrative example of an implementable structure of the first touch electrode 310 and the second touch electrode 320 is shown for reference.

[0062] The specific structural design of the first touch electrode 310 and the second touch electrode 320 included in the touch function layer 300 can be as follows: Figures 3 to 5 as well as Fig. 6A and Figure 6B As shown, specifically, the first touch electrode 310 includes a plurality of first touch electrode blocks 311 and a plurality of first connecting portions 312, in each of the first touch electrodes 310, the first touch electrode blocks 311 are connected to each other through the first connecting portions 312, the second touch electrode 320 includes a plurality of second touch electrode blocks 321 and a plurality of second connecting portions 322, in each of the second touch electrodes 320, the second touch electrode blocks 321 are connected to each other through the second connecting portions 322, the orthographic projection of the first connecting portion 312 on the substrate 100 and the orthographic projection of the second connecting portion 322 on the substrate 100 intersect, so that at the intersection, the first touch electrode block 311 and the second touch electrode block 321 can form an attached Figure 5 The touch unit (touch capacitor) shown.

[0063] In at least one embodiment of the present disclosure, the first touch electrode block 311 and the second touch electrode block 321 are in the same layer and made of the same material, and one of the first connecting portion 312 and the second connecting portion 322 is connected to the first touch electrode block 311 ( Figure 4 and Figure 5 The second connection part 322 is selected to be in the same layer and the same material, and the other ( Figure 4 and Figure 5The first connection part 312 is selected as the conductive bridge. For example, an insulating layer may be provided between the layer where the first touch electrode block 311 and the second touch electrode 320 are located and the layer where the first connection part 312 is located, and a via is provided in the insulating layer, and the first connection part 312 is connected to the first touch electrode block 311 through the via to form a conductive bridge.

[0064] In some embodiments of the present disclosure, the first touch electrode and the second touch electrode may be transparent electrodes (such as indium tin oxide, etc.). In this way, even if the first touch electrode and the second touch electrode cover each light-emitting device, the light emitted by the light-emitting device can be emitted from the touch panel to display an image.

[0065] In other embodiments of the present disclosure, Figures 3 to 7 As shown, the first touch electrode 310 and the second touch electrode 320 can be set as grid electrodes, so that the light emitted by the light-emitting device 200 can be emitted from the mesh holes of the grid electrode, thereby improving the light extraction rate of the display panel, improving the brightness of the display panel and reducing its power consumption; in addition, under this design, the first touch electrode 310 and the second touch electrode 320 can select conductive materials such as metal with low light transmittance but high conductivity, thereby reducing the voltage drop generated during driving.

[0066] In the embodiment of the present disclosure, when the first coil 301 and the second coil 302 can cover the range where the display area is located, there is no limitation on the specific configuration of the first coil 301 and the second coil 302, and they can be designed according to the actual process requirements. In the following, several configurations of the first coil 301 and the second coil 302 are described in combination with different embodiments.

[0067] In some embodiments of the present disclosure, it can be referred to again Figure 1 , the first coil 301 includes a first touch electrode 310, a first signal line 331 and a second signal line 332, and in each first coil 301, the first signal line 331 and the second signal line 332 are respectively connected to the two ends of the first touch electrode 310; and / or, the second coil 302 includes a second touch electrode 320, a third signal line 333 and a fourth signal line 334, and in each second coil 302, the third signal line 333 and the fourth signal line 334 are respectively connected to the two ends of the first touch electrode 310. In this way, each first touch electrode 310 and each second touch electrode 320 are independent of each other, and when performing capacitive touch detection, it is possible to maintain touch channels equal to the number of first touch electrodes 310 and second touch electrodes 320, thereby ensuring the touch accuracy of the touch function layer.

[0068] In other embodiments of the present disclosure, Figure 8As shown, the first coil 301 includes at least two first touch electrodes 310, a first signal line 331 and a second signal line 332. In each first coil 301, the first touch electrodes 310 are connected end to end, and the first signal line 331 and the second signal line 332 are respectively connected to the two ends of the two first touch electrodes 310 that are not connected to the adjacent first touch electrodes 310; and / or, the second coil 302 includes at least two second touch electrodes 320, a third signal line 333 and a fourth signal line 334. In each second coil 302, the second touch electrodes 320 are connected end to end, and the third signal line 333 and the fourth signal line 334 are respectively connected to the two ends of the two first touch electrodes 310 that are not connected to the adjacent second touch electrodes 320. In this way, the number of wirings of the first signal line 331, the second signal line 332, the third signal line 333 and the fourth signal line 334 and the wiring space occupied can be reduced, thereby facilitating the design of an extremely narrow frame of the display panel.

[0069] In the embodiments of the present disclosure, when the excitation signal of the excitation structure 400 can cover the range where the display area is located, there is no restriction on the specific setting position of the excitation structure 400, and it can be designed according to the actual process requirements. Below, several setting positions of the excitation structure 400 are described in combination with different embodiments.

[0070] In at least one embodiment of the present disclosure, Figure 2 , Figure 3 and Fig. 9 As shown, at least part of the excitation structure 400 is located in the display area 11, and the part of the excitation structure 400 located in the display area 11 is a grid structure, and the grid lines of the grid structure are projected on the substrate 100 within the gaps between adjacent first electrodes 210 on the substrate 100.

[0071] For example, in some embodiments of the present disclosure, Figure 2 and Fig. 9 As shown, the excitation structure 400 is located in the display area 11, and at least part of the outer edge of the excitation structure 400 coincides with at least part of the outer edge of the display area 11. In this way, the main part of the excitation structure 400 (ignoring the adjacent signal lines) does not occupy additional space in the non-display area of ​​the display panel, that is, the arrangement of the excitation structure 400 does not increase the width of the non-display area of ​​the display panel, which is conducive to the design of an extremely narrow frame of the display panel.

[0072] For example, in some other embodiments of the present disclosure, part of the excitation structure 400 is located in the display area 11, and another part of the excitation structure 400 is located in the non-display area 12, that is, the excitation structure 400 spans the boundary between the display area 11 and the non-display area 12, thereby increasing the coverage range of the excitation signal generated by the excitation structure 400 and the intensity of the generated excitation signal.

[0073] In the embodiments of the present disclosure, when the excitation signal of the excitation structure 400 can cover the range where the display area is located, there is no restriction on the specific structure of the excitation structure 400 and it can be designed according to the actual process requirements. Below, several settings of the excitation structure 400 are described in combination with different embodiments.

[0074] In some embodiments of the present disclosure, Fig. 9 As shown, the excitation structure 400 includes a coil portion 410 and a dummy portion 420. The coil portion 410 is distributed along the edge of the display area 11 and surrounds at least part of the dummy portion 420. The coil portion 410 is spaced apart from the dummy portion 420. The coil portion 410 is mainly distributed in the edge area of ​​the display area 11, and the dummy portion 420 is mainly distributed in the middle area of ​​the display area 11. Both the coil portion 410 and the dummy portion 420 are distributed in the gap between adjacent first electrodes, so that the difference in light transmittance between the area where the coil portion 410 is located and the area where the dummy portion 420 is located in the display area 11 is eliminated, thereby improving the brightness uniformity of the display panel.

[0075] For example, Fig. 9 As shown, the coil portion 410 and the dummy portion 420 are in the same layer and made of the same material as the first electrode 210 , thereby simplifying the manufacturing process of the excitation structure 400 and reducing the number of times the mask is used, thereby controlling the manufacturing cost of the display panel.

[0076] It should be noted that in Fig. 9 In the structure shown, the dummy portion 420 is not necessarily designed, and the dummy portion 420 can also be removed to form a Figure 2 The structure shown.

[0077] In other embodiments of the present disclosure, Fig.10As shown, the excitation structure 400 includes a coil portion 410 and a dummy portion 420. The coil portion 410 is distributed along the edge of the display area 11 and surrounds at least part of the dummy portion 420. The coil portion 410 is spaced apart from the dummy portion 420. The coil portion 410 includes a first portion 411, a second portion 412 and a third portion 413 which are connected end to end in sequence. The first portion 411, the second portion 412 and the third portion 413 are respectively located on different sides of the display area 11. The first portion 411, the third portion 413 and the dummy portion 420 are in the same layer and made of the same material, and the second portion 412 is in a different layer from the first portion 411.

[0078] For example, Figure 3 and Fig.10 As shown, the substrate 100 includes a pixel driving circuit located in the display area 11, the pixel driving circuit includes a thin film transistor 110 and a signal line 120, and the second portion 412 is in the same layer and made of the same material as the conductive structure in the thin film transistor 110 or the signal line 120. For example, the thin film transistor 110 may include a gate electrode, a source-drain electrode, etc., and the conductive structure in the thin film transistor 110 may be a gate electrode, a source-drain electrode, etc. For example, the signal line 120 of the pixel driving circuit may be a gate line, a power line, a data line, etc.

[0079] In other embodiments of the present disclosure, Fig.11 As shown, the excitation structure 400 includes a sub-coil 431 and a connecting structure 432. The sub-coil 431 is configured as a coil with at least two turns arranged from the inside to the outside. One end of the connecting structure 432 is connected to the inner end of the coil, and the other end is located outside the coil (for example, an area in the display area 11 that is not surrounded and covered by the sub-coil 431, or as far as Fig.11 The non-display area 12 shown in FIG. 1 includes a position) to cross the coil. It should be noted that in Fig.11 In the figure, the arrow mark "→" represents the direction of the applied signal (which can be understood as the direction of the current, or the direction of change of the voltage drop).

[0080] It should be noted that the connection structure 432 and the sub-coil 431 are located in different layers, and the connection structure 432 can be located above the sub-coil 431 (eg Fig.11 As shown) or below. For example, the connection structure 432 can be formed synchronously with other conductive structures in the display panel except the first electrode, thereby simplifying the preparation process of the display panel. For example, the connection structure 432 can be in the same layer as the second electrode 230 of the light-emitting device, so as to be formed on the side of the sub-coil 431 away from the substrate 100 (above the sub-coil 431); or, the connection structure 432 can be arranged in the same layer as the conductive structure in the pixel driving circuit, such as the signal line 120 or the gate electrode, source and drain electrode in the thin film transistor 110, so as to be formed on the side of the sub-coil 431 facing the substrate 100 (below the sub-coil 431).

[0081] In other embodiments of the present disclosure, Fig.12 As shown, the excitation structure 400 includes a first coil electrode 441 and a plurality of parallel second coil electrodes 442. The extension direction of the first coil electrode 441 intersects with the extension direction of the second coil electrode 442. The second coil electrodes 442 are spaced apart from each other, and one end of each second coil electrode 442 on the same side is connected to the first coil electrode 441, and the other end of each second coil electrode 442 is a free end. It should be noted that Fig.12 In the figure, the arrow mark "→" represents the direction of the applied signal (which can be understood as the direction of the current, or the direction of change of the voltage drop).

[0082] In other embodiments of the present disclosure, Fig.13 As shown, the excitation structure 400 includes a plurality of sub-coils 431 spaced apart from each other, each sub-coil 431 includes at least one first coil electrode 441 and at least two second coil electrodes 442, in each sub-coil 431, the second coil electrodes 442 are connected through the first coil electrodes 441, and the second coil electrodes 442 of each sub-coil 431 are arranged in parallel. It should be noted that Fig.13 In the figure, the arrow mark "→" represents the direction of the applied signal (which can be understood as the direction of the current, or the direction of change of the voltage drop).

[0083] In at least one embodiment of the present disclosure, it is possible to refer to Figure 3 , the touch function layer 300 can be arranged on the encapsulation structure 500, the encapsulation structure 500 is located on the display side of the display substrate to cover the light emitting device 200, the second encapsulation layer 520 and the third encapsulation layer 530 covering the first encapsulation layer 510, and the second encapsulation layer 520 is located between the first encapsulation layer 510 and the third encapsulation layer 530. For example, the second encapsulation layer 520 is an organic film layer, and the first encapsulation layer 510 and the third encapsulation layer 530 are inorganic film layers. The second encapsulation layer 520 can improve the flatness of the surface of the display panel, so as to facilitate the arrangement of other components on the encapsulation layer; in addition, the second encapsulation layer 520 can have a certain degree of flexibility to relieve the stress of the first encapsulation layer 510 and the third encapsulation layer 530, thereby improving the reliability of the display panel, which is more conducive to the application of the display panel in the field of flexible display; in addition, the third encapsulation layer 530 has high density and has a high barrier effect on water, oxygen, etc., and the third encapsulation layer 530 has higher strength, so as to facilitate the preparation of other components thereon (such as structures related to touch function, optical film layers, etc.).

[0084] At least one embodiment of the present disclosure provides a display device, which may be the display panel in the above embodiment. For example, the display device may include a touch structure, an optical film (such as a microlens, a polarizer), a cover plate, and other structures arranged on the light-emitting side of the display panel.

[0085] For example, the display device may be any product or component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, or the like.

[0086] It is understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document is not limited here.

[0087] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0088] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, etc. made within the spirit and principles of this specification should be included in the protection scope of this specification.

Claims

1. A display panel, characterized in that: include: A display substrate, comprising a display area and a plurality of light emitting devices, wherein the light emitting devices are located in the display area and comprise a first electrode; A touch function layer, located on the display substrate and in the display area; The excitation structure is located on the display substrate, and at least a part of the excitation structure is arranged in the same layer as the first electrode.

2. The display panel according to claim 1, characterized in that: The touch function layer includes a first electrode structure and a second electrode structure, wherein an orthographic projection of the first electrode structure on the display substrate intersects with an orthographic projection of the second electrode structure on the display substrate; Preferably, a portion of the excitation structure that is in the same layer as the first electrode is made of the same material as the first electrode.

3. The display panel according to claim 2, characterized in that: At least part of the excitation structure is located in the display area, and the part of the excitation structure located in the display area is a grid structure, The orthographic projection of the grid lines of the grid structure on the surface where the display substrate is located is located within the orthographic projection of the gaps between adjacent first electrodes on the surface where the display substrate is located; Preferably, the excitation structure is located in the display area, and at least a portion of the outer edge of the excitation structure coincides with at least a portion of the outer edge of the display area; or, The display substrate further includes a non-display area surrounding the display area, a portion of the excitation structure is located in the display area, and another portion of the excitation structure is located in the non-display area.

4. The display panel according to claim 3, characterized in that: The excitation structure includes a coil part and a dummy part, wherein the coil part is distributed along the edge of the display area and surrounds at least a portion of the dummy part, and the coil part is spaced from the dummy part; Preferably, the coil part and the dummy part are in the same layer and made of the same material as the first electrode.

5. The display panel according to claim 3, characterized in that: The excitation structure includes a coil portion and a dummy portion, wherein the coil portion is distributed along an edge of the display area and surrounds at least a portion of the dummy portion, and the coil portion is spaced apart from the dummy portion; and The coil portion comprises a first portion, a second portion and a third portion which are connected end to end in sequence, the first portion, the second portion and the third portion are respectively located at different sides of the display area, the first portion, the third portion and the dummy portion are in the same layer and made of the same material, and the second portion is in a different layer from the first portion; Preferably, the display substrate comprises a pixel driving circuit located in the display area, the pixel driving circuit comprises a thin film transistor and a signal line, and the second portion is in the same layer and made of the same material as the conductive structure in the thin film transistor or the signal line.

6. The display panel according to claim 3, characterized in that: The excitation structure includes a sub-coil and a connection structure, the sub-coil is configured as a coil with at least two turns arranged from inside to outside, one end of the connection structure is connected to the inner end of the coil, and the other end is located outside the coil to cross the coil; or The excitation structure comprises a first coil electrode and a plurality of parallel second coil electrodes, the extension direction of the first coil electrode intersects with the extension direction of the second coil electrode, the second coil electrodes are spaced apart from each other, and one end on the same side of each second coil electrode is connected to the first coil electrode, and the other end of each second coil electrode is a free end; or The excitation structure includes a plurality of sub-coils spaced apart from each other, each of the sub-coils includes at least one first coil electrode and at least two second coil electrodes, in each of the sub-coils, the second coil electrodes are connected via the first coil electrodes, and the second coil electrodes of each of the sub-coils are arranged in parallel.

7. The display panel according to any one of claims 2 to 6, characterized in that: The first electrode structure includes a plurality of first coils arranged in parallel, the second electrode structure includes a plurality of second coils arranged in parallel, and the orthographic projections of the first coils on the surface where the display substrate is located intersect with the orthographic projections of the second coils on the surface where the display substrate is located; Preferably, at least part of the excitation structure is distributed along an edge of the display area.

8. The display panel according to any one of claims 2 to 6, characterized in that: The touch function layer includes: A plurality of first touch control electrodes arranged in parallel, each of the first coils comprising at least one first touch control electrode; A plurality of first signal lines and a plurality of second signal lines are connected to the first touch electrodes, and each of the first coils includes one first signal line and one second signal line; a plurality of parallel second touch electrodes, each of the second coils comprising at least one second touch electrode, an orthographic projection of the first touch electrode on the display substrate intersecting with an orthographic projection of the second touch electrode on the display substrate; A plurality of third signal lines and a plurality of fourth signal lines are connected to the second touch electrodes, and each of the second coils includes one of the third signal line and the fourth signal line.

9. The display panel according to claim 8, characterized in that: The first coil includes one first touch electrode, one first signal line and one second signal line, and in each of the first coils, the first signal line and the second signal line are respectively connected to two ends of the first touch electrode; and / or The second coil includes one second touch electrode, one third signal line, and one fourth signal line. In each of the second coils, the third signal line and the fourth signal line are respectively connected to two ends of the first touch electrode.

10. The display panel according to claim 8, characterized in that: The first coil includes at least two first touch electrodes, one first signal line and one second signal line, in each of the first coils, the first touch electrodes are connected end to end, and the first signal line and the second signal line are respectively connected to two ends of the two first touch electrodes that are not connected to the adjacent first touch electrodes; and / or The second coil includes at least two second touch electrodes, one third signal line and one fourth signal line. In each of the second coils, the second touch electrodes are connected end to end to each other, and the third signal line and the fourth signal line are respectively connected to two ends of the two first touch electrodes that are not connected to the adjacent second touch electrodes.

11. The display panel according to claim 8, characterized in that: The first touch electrode comprises a plurality of first touch electrode blocks and a plurality of first connecting portions, wherein in each of the first touch electrodes, the first touch electrode blocks are connected to each other via the first connecting portions, and the second touch electrode comprises a plurality of second touch electrode blocks and a plurality of second connecting portions, wherein in each of the second touch electrodes, the second touch electrode blocks are connected to each other via the second connecting portions, and the orthographic projection of the first connecting portions on the display substrate intersects with the orthographic projection of the second connecting portions on the display substrate; Preferably, the first touch electrode block and the second touch electrode block are in the same layer and made of the same material, one of the first connecting portion and the second connecting portion is in the same layer and made of the same material as the first touch electrode block, and the other of the first connecting portion and the second connecting portion is a conductive bridge.

12. A display device, characterized in that: A display panel comprising any one of claims 1 to 11.

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