Display panel, display apparatus, and terminal device

Abstract

A display panel, a display apparatus, and a terminal device, relating to the technical field of display. In the display panel, light-emitting devices are distributed on a driving backplane in an array; a packaging layer covers the light-emitting devices; a touch function layer is arranged on the surface of the packaging layer distant from the driving backplane, and comprises a plurality of conductive layers; the touch function layer further comprises a plurality of mutually independent touch electrodes at least partially located in a display area, first induction coils and second induction coils which extend in different directions and are insulated from each other, a touch lead, a first induction lead, and a second induction lead; the touch lead is connected to the touch electrodes; the first induction lead is connected to the first induction coils, and the second induction lead is connected to the second induction coils; the touch electrodes, the induction coils, the touch lead, and the induction leads are distributed on the plurality of conductive layers; the first induction coils are arranged on a same layer, the second induction coils are arranged on a same layer, and the first induction lead and the second induction lead are located on different conductive layers; and the touch electrodes and the induction coils are at most partially overlapped.

Description

Display panel, display device and terminal equipment TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular to a display panel, a display device and a terminal equipment. BACKGROUND

[0002] At present, display panels with direct display realized by light emitting devices with independent light emitting are widely used, and the light emitting devices can be organic light emitting diodes (OLED) and the like. The touch function of the existing display panel with touch function is single.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information which does not constitute prior art known to those of ordinary skill in the art.

[0004] SUMMARY

[0005] The present disclosure provides a display panel, a display device and a terminal equipment.

[0006] According to one aspect of the present disclosure, a display panel is provided, having a display area and a peripheral area located outside the display area, the peripheral area including a fan-out area; the display panel includes:

[0007] a driving backplane;

[0008] a plurality of light emitting devices, arrayed on the driving backplane and located in the display area;

[0009] an encapsulation layer covering each of the light emitting devices;

[0010] a touch function layer provided on a surface of the encapsulation layer away from the driving backplane, and including a plurality of conductive layers distributed in a direction away from the driving backplane; the touch function layer further includes a plurality of touch electrodes and a plurality of sensing coils which are independent of each other and at least partially located in the display area, and a touch lead and a sensing lead extending to the fan-out area; the touch lead is connected with the touch electrodes; the sensing coils include a plurality of first sensing coils and a plurality of second sensing coils; the first sensing coils and the second sensing coils extend in different directions and are insulatively arranged; the sensing lead includes a first sensing lead and a second sensing lead; the first sensing lead is connected with the first sensing coils, and the second sensing lead is connected with the second sensing coils;

[0011] The touch electrodes, the induction coils, the touch lead lines and the induction lead lines are distributed in the plurality of conductive layers; each of the first induction coils is arranged in the same layer, each of the second induction coils is arranged in the same layer, and the first induction lead lines and the second induction lead lines are located in different conductive layers; and the touch electrodes and the induction coils at most partially overlap.

[0012] In an exemplary embodiment of the present disclosure, the conductive layers include a first conductive layer and a second conductive layer distributed in sequence in a direction away from the driving backplate;

[0013] Each of the touch electrodes is arranged in the same layer and arrayed in a row direction and a column direction; each of the first induction coils extends in the row direction, and each of the second induction coils extends in the column direction;

[0014] One of the touch electrodes is located within a range surrounded by one of the first induction coils or one of the second induction coils.

[0015] In an exemplary embodiment of the present disclosure, the induction coils have a broken gap, and the induction lead lines are connected to both ends of the gap;

[0016] The gap of the first induction coil faces one side of the display area in the row direction, and the gaps of two adjacent first induction coils face in opposite directions, and the first induction lead lines connecting the two adjacent first induction coils are located on both sides of the display area;

[0017] The gap of the second induction coil faces the fan-out area.

[0018] In an exemplary embodiment of the present disclosure, the induction coils have a broken gap; the gap of at least part of the induction coils located in different layers faces the fan-out area; the induction lead lines are connected to both ends of the gap, and at least part of the induction lead lines extend from the display area to the fan-out area.

[0019] In an exemplary embodiment of the present disclosure, the touch electrodes and the touch lead lines are located in different layers; one of the touch lead lines and the column of touch electrodes in which the touch electrodes connected to the touch lead line overlap.

[0020] In an exemplary embodiment of the present disclosure, the touch electrodes and the touch lead lines are arranged in the same layer; one of the touch lead lines and the column of touch electrodes in which the touch electrodes connected to the touch lead line do not overlap.

[0021] In an exemplary embodiment of the present disclosure, the first induction coils and the first induction lead lines are located in the first conductive layer; the touch electrodes, the touch lead lines, the second induction coils and the second induction lead lines are located in the second conductive layer.

[0022] A column of the touch electrodes and the touch leads connected thereto are within a range surrounded by the second sensing coil in the display area.

[0023] In an exemplary embodiment of the present disclosure, the pitch between two adjacent rows of the touch electrodes is less than the pitch between two adjacent columns of the touch electrodes; and a row of the touch electrodes overlaps the first sensing coil.

[0024] In an exemplary embodiment of the present disclosure, the second sensing coil and the second sensing lead are located in the first conductive layer; the touch electrodes are located in the second conductive layer; and at least part of at least one of the touch leads, the first sensing coil and the first sensing lead is located in the second conductive layer.

[0025] A row of the touch electrodes is within a range surrounded by the first sensing coil in the display area.

[0026] A column of the touch electrodes and the touch leads connected thereto are within a range surrounded by the second sensing coil in the display area.

[0027] In an exemplary embodiment of the present disclosure, at least part of the first sensing coil comprises a plurality of sensing conductive segments located in the second conductive layer and a sensing connection segment located in the first conductive layer; the sensing conductive segments are connected through the sensing connection segment; the touch leads overlap the sensing connection segment and are spaced apart from the sensing conductive segments.

[0028] At least part of the first sensing lead comprises a plurality of sensing lead segments located in the second conductive layer and a lead connection segment located in the first conductive layer; the sensing lead segments are connected through the lead connection segment; the touch leads overlap the lead connection segment and are spaced apart from the sensing lead segments.

[0029] In an exemplary embodiment of the present disclosure, the touch leads, the second sensing coil and the second sensing lead are located in the first conductive layer; the touch electrodes, the first sensing coil and the first sensing lead are located in the second conductive layer.

[0030] A row of the touch electrodes is within a range surrounded by the first sensing coil in the display area.

[0031] A column of the touch electrodes and the touch leads connected thereto are within a range surrounded by the second sensing coil in the display area.

[0032] In an exemplary embodiment of the present disclosure, at least part of at least one of the touch control lead, the first induction coil and the first induction lead is located in the first conductive layer; the touch control electrode, the second induction coil and the second induction lead are located in the second conductive layer.

[0033] One row of the touch control electrodes is located within a range surrounded by one of the first induction coils in the display area.

[0034] One column of the touch control electrodes and the touch control leads connected thereto is located within a range surrounded by one of the second induction coils in the display area.

[0035] In an exemplary embodiment of the present disclosure, at least part of the first induction coil comprises a plurality of induction conductive segments located in the first conductive layer and an induction connecting segment located in the second conductive layer; the induction conductive segments are connected through the induction connecting segment; the touch control lead overlaps the induction connecting segment and is spaced apart from the induction conductive segments.

[0036] In an exemplary embodiment of the present disclosure, each of the touch control leads connected to the touch control electrodes in the same column is spaced apart along the row direction and overlaps the touch control electrodes connected thereto.

[0037] In an exemplary embodiment of the present disclosure, at least part of the induction coil overlaps at least part of the touch control electrode.

[0038] The touch control electrode overlapping the induction coil is provided with a through hole, and the induction coil overlaps the through hole.

[0039] In an exemplary embodiment of the present disclosure, a boundary of a projection of the through hole on the drive backplane is in an elliptical shape; or

[0040] The boundary of the projection of the through hole on the drive backplane comprises two arc segments and a straight segment connecting the two arc segments; the straight segment overlaps the induction coil, and an extension direction of the straight segment is perpendicular to an extension direction of the induction coil overlapping the straight segment.

[0041] In an exemplary embodiment of the present disclosure, the induction coil extends along a specified direction, and the specified direction is the row direction or the column direction.

[0042] The touch control electrode is provided with a plurality of through holes spaced apart along the specified direction, and each of the through holes overlaps the induction coil; a dimension of the through hole in a direction perpendicular to the specified direction is greater than a line width of the induction coil.

[0043] In an example embodiment of the present disclosure, the touch control electrode is provided with a breakage communicating with two adjacent through holes in the row direction; and / or, the touch control electrode is provided with a breakage communicating with the outermost through hole in a row of the through holes.

[0044] The inductive coil overlaps the breakage.

[0045] In an example embodiment of the present disclosure, a dummy electrode is provided in the through hole and arranged in the same layer as the touch control electrode, and the dummy electrode is arranged spaced apart from the touch control electrode.

[0046] In an example embodiment of the present disclosure, the boundary of the touch control electrode is polygonal; part of the touch control electrode is located within a range surrounded by an inductive coil, and the boundary of the touch control electrode close to the inductive coil has a recessed area.

[0047] In an example embodiment of the present disclosure, the boundary of the orthographic projection of the recessed area on the driving back plate is arc-shaped.

[0048] The boundaries of the orthographic projections of two adjacent recessed areas on the driving back plate intersect.

[0049] According to an aspect of the present disclosure, a display device is provided, comprising the display panel as described in any one of the above.

[0050] According to an aspect of the present disclosure, a terminal device is provided, comprising:

[0051] The display device as described in any one of the above;

[0052] An input device for emitting electromagnetic signals.

[0053] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0054] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure. It is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings.

[0055] FIG. 1 is a schematic diagram of an embodiment of a terminal device of the present disclosure.

[0056] FIG. 2 is a schematic diagram of an embodiment of a display device of the present disclosure.

[0057] FIG. 3 is a schematic diagram of an embodiment of a display panel of the present disclosure.

[0058] Fig. 4 is a top view of a first embodiment of a display panel of the present disclosure.

[0059] Fig. 5 is a cross-sectional view of the first embodiment of the display panel of the present disclosure.

[0060] Fig. 6 is an A-A cross-sectional view of Fig. 4.

[0061] Fig. 7 is a B-B cross-sectional view of Fig. 4.

[0062] Fig. 8 is a C-C cross-sectional view of Fig. 4.

[0063] Fig. 9 is a D-D cross-sectional view of Fig. 4.

[0064] Fig. 10 is an E-E cross-sectional view of Fig. 4.

[0065] Fig. 11 is an F-F cross-sectional view of Fig. 4.

[0066] Fig. 12 is a top view of a second embodiment of a display panel of the present disclosure.

[0067] Fig. 13 is a cross-sectional view of the second embodiment of the display panel of the present disclosure.

[0068] Fig. 14 is an A-A cross-sectional view of Fig. 12.

[0069] Fig. 15 is a B-B cross-sectional view of Fig. 12.

[0070] Fig. 16 is a C-C cross-sectional view of Fig. 12.

[0071] Fig. 17 is a D-D cross-sectional view of Fig. 12.

[0072] Fig. 18 is an E-E cross-sectional view of Fig. 12.

[0073] Fig. 19 is an F-F cross-sectional view of Fig. 12.

[0074] Fig. 20 is a G-G cross-sectional view of Fig. 12.

[0075] Fig. 21 is a top view of a third embodiment of a display panel of the present disclosure.

[0076] Fig. 22 is a cross-sectional view of the third embodiment of the display panel of the present disclosure.

[0077] Fig. 23 is an A-A cross-sectional view of Fig. 21.

[0078] Fig. 24 is a B-B cross-sectional view of Fig. 21.

[0079] Fig. 25 is a C-C cross-sectional view of Fig. 21.

[0080] Fig. 26 is a D-D cross-sectional view of Fig. 21.

[0081] FIG. 27 is an E-E sectional view of FIG. 21.

[0082] FIG. 28 is a top view schematically showing a fourth embodiment of a display panel of the present disclosure.

[0083] FIG. 29 is a sectional view schematically showing the fourth embodiment of the display panel of the present disclosure.

[0084] FIG. 30 is an A-A sectional view of FIG. 28.

[0085] FIG. 31 is a B-B sectional view of FIG. 28.

[0086] FIG. 32 is a C-C sectional view of FIG. 28.

[0087] FIG. 33 is a D-D sectional view of FIG. 28.

[0088] FIG. 34 is an E-E sectional view of FIG. 28.

[0089] FIG. 35 is a partial enlarged view of an embodiment of a display panel of the present disclosure.

[0090] FIG. 36 is a partial enlarged view of an embodiment of a display panel of the present disclosure.

[0091] FIGS. 37 to 40 are schematic views of a first type of touch electrode in a display panel of the present disclosure.

[0092] FIG. 41 is a partial enlarged view of a display panel employing the first type of touch electrode.

[0093] FIG. 42 is a schematic view of a second type of touch electrode in a display panel of the present disclosure.

[0094] FIG. 43 is a partial enlarged view of another embodiment of a display panel of the present disclosure. DETAILED DESCRIPTION

[0095] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, these embodiments should not be construed as limiting all example embodiments. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the specification. Moreover, the figures herein are not necessarily drawn to scale.

[0096] Although relative terms are used in this description, such as "upper," "lower," to describe one component's relationship to another component, these terms are used herein for convenience only and are not intended to be limiting. It is to be understood that if a device were turned over, the described "upper" component would then be a "lower" component. When a structure is "on" another structure, it can mean that the structure is formed integrally with the other structure or that the structure is "directly" on the other structure or that the structure is "indirectly" on the other structure via another structure.

[0097] The terms "one," "a," "an," "the" and "at least one" are used to mean that "one or more" of something is present; the terms "includes," "including," and "has" are used to mean "comprising," meaning something is present, unless otherwise noted; and the term "or" is used as a inclusive or where "either" or "any one" is intended. The terms "first," "second," and "third," etc. are used only as labels, and do not imply any order or priority.

[0098] The row direction X and the column direction Y herein are two intersecting directions, in the drawings of the present disclosure, the row direction X is the horizontal direction, and the column direction Y is the vertical direction, which are perpendicular to each other, but are not limited thereto, and the row direction X and the column direction Y can also be non-perpendicular directions. In addition, it can be understood by those skilled in the art that the actual orientations of the row direction X and the column direction Y can change with the rotation of the display panel, but the relative positions of the row direction X and the column direction Y do not change.

[0099] The "overlapping" of the A feature and the B feature herein means that the orthographic projection of the A feature on a plane and the orthographic projection of the B feature on the plane at least partially coincide; the plane can be the surface of the driving backplate, or the surface of the substrate of the driving backplate, or other planes parallel to the driving backplate.

[0100] The "same layer" of A and B herein means that A and B belong to different areas in the same film layer, and each area can be formed at the same time; A and B are "different layers" means that A and B belong to different film layers, and different film layers means that the film layers are not formed at the same time.

[0101] The patterns of the touch lead, the induction coil, and the induction lead, etc. herein are drawn with a specific line width, and the purpose is only to facilitate the distinction, and does not represent the limitation on the actual line width.

[0102] The display panel according to the embodiments of the present disclosure can be shown in FIG. 2 and FIG. 3, which includes a display area AA and a peripheral area WA outside the display area AA. The peripheral area WA can be a continuous annular area surrounding the display area AA, or can be discontinuous areas surrounding the display area AA, for example, the peripheral area WA can be distributed on both sides of the display area AA. The display area AA can be used for light emission to display images, while the peripheral area WA does not emit light.

[0103] The peripheral area WA is a continuous annular area surrounding the display area AA, which can be formed by a fan-out area FA and a peripheral area. The fan-out area FA has a binding portion, which can have a plurality of conductive pads PA that can be bound to a drive circuit board PC. The drive circuit board PC has a display chip DIC for controlling image display. The display panel can be controlled to display images by the drive circuit board PC and the display chip DIC thereon. Of course, the display chip DIC can also be arranged in the fan-out area FA and bound to part of the conductive pads PA, and then part of the conductive pads PA are bound to the drive circuit board PC. The drive circuit board PC and the display chip DIC can control the display panel to display images. For example, the display panel has a rectangular outline, and the fan-out area FA is located at one side of the rectangle.

[0104] Further, in some embodiments, the fan-out area FA can have a bending area extending in the row direction X. The bending area is a flexible structure that can be bent, and the binding portion is located on the side of the bending area away from the display area AA. By bending the bending area, the fan-out area FA can be bent to the backlight side of the display panel, i.e., the side opposite to the light emission direction. Thus, the drive circuit board can be connected to the binding portion on the backlight side of the display panel.

[0105] As shown in FIG. 5, FIG. 13, FIG. 22 and FIG. 29, the display panel can include a drive backplane PNL and a plurality of light emitting devices LD arranged on one side of the drive backplane PNL, wherein:

[0106] The drive backplane PNL has a drive circuit, by which the light emitting devices LD can be driven to emit light to display images. In some embodiments of the present disclosure, the drive backplane PNL can include a substrate and a circuit layer arranged on one side of the substrate. The substrate can be a flat structure, and its material can be a hard material such as glass, or a flexible material such as polyimide. Meanwhile, the substrate can be a single-layer or multi-layer structure.

[0107] The circuit layer includes the above-mentioned driving circuit. For example, the driving circuit can include pixel circuits in the display area AA and peripheral circuits in the peripheral area WA. The pixel circuits can be of 3T1C, 7T1C, 8T1C, etc. structure, as long as they can drive the light emitting devices LD to emit light. The structure of the pixel circuits is not specially limited herein. The pixel circuits can be of the same number as the light emitting devices LD and are connected to the light emitting devices LD one by one. Of course, one pixel circuit can also be connected to multiple light emitting devices LD, which is not specially limited herein.

[0108] The peripheral circuits are connected to the pixel circuits and are used to input driving signals to the pixel circuits to control the light emitting devices LD to emit light. The peripheral circuits can include gate driving circuits and light emitting control circuits, and can also include other circuits, which are not specially limited herein.

[0109] The above-mentioned driving circuit can include multiple thin film transistors and capacitors. The thin film transistors can be top-gate or bottom-gate thin film transistors. Each thin film transistor can include an active layer and a gate electrode which are arranged in an overlapping manner. The active layers of the thin film transistors can be arranged in the same semiconductor layer. Alternatively, the active layers of the thin film transistors can be arranged in multiple semiconductor layers. The active layers of different thin film transistors can be distributed in different semiconductor layers. The material of the semiconductor layer can be polysilicon or metal oxide, which is not specially limited herein.

[0110] The circuit layer can also include wires for transmitting signals which are connected to the pixel circuits and the peripheral circuits. For example, a column of pixel circuits can be connected to a data line extending along the column direction Y. The data line can transmit data signals. The data line can extend to the fan-out area FA and be connected to the binding part. The gate driving circuits and the light emitting control circuits can be connected to multiple wires such as clock signal lines. These wires can also extend to the fan-out area FA and be connected to the binding part.

[0111] As shown in FIG. 2, taking a top-gate thin film transistor as an example, in some embodiments, the circuit layer can include, in the direction away from the substrate, a semiconductor layer, a first gate insulating layer, a first gate electrode layer, a second gate insulating layer, a second gate electrode layer, an interlayer dielectric layer, a first source-drain layer, a passivation layer, a first planarization layer, a second source-drain layer, and a second planarization layer which are arranged in sequence. The active layer of the thin film transistor is located in the semiconductor layer. The gate electrode is located in the first gate electrode layer. The two plates of the capacitor are located in the first gate electrode layer and the second gate electrode layer. The first source-drain layer and the second source-drain layer are used to realize connection between at least part of the thin film transistors and between the thin film transistors and the capacitor, and are used to transmit driving signals. The type of the driving signals and the specific pattern of each film layer depend on the specific structure of the driving circuit, which is not specially limited herein.

[0112] As shown in FIGS. 5, 13, 22 and 29, the light emitting device LD can be an OLED (organic light emitting diode) using an organic light emitting material, a Mini LED (sub-millimeter light emitting diode, size: 100-200 pm), a Micro LED (micro light emitting diode, size: not greater than 100 pm), an LED (light emitting diode, size: greater than 200 pm) using an inorganic light emitting material, etc., without special limitation here as long as it can emit light. The light emitting device LD is located in the display area AA, and of course, there can be some light emitting devices LD located in the peripheral area WA, but the light emitting devices LD located in the peripheral area WA can be floating and not emit light.

[0113] Taking the OLED as an example, the light emitting device LD can include a first electrode, a light emitting layer and a second electrode stacked in sequence in a direction away from the driving backplane PNL, and the light emitting layer can be excited to emit light by applying an electrical signal to the first electrode and the second electrode. The specific light emitting principle is not described here in detail. The first electrode can act as an anode, and the second electrode can act as a cathode, and the materials of the two include conductive materials such as metals and metal oxides. The light emitting layer can include a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer and an electron injection layer stacked in sequence in a direction away from the driving backplane PNL. Of course, other structures can also be used as long as they can cooperate with the first electrode and the second electrode to emit light.

[0114] The display substrate can further include a pixel definition layer separating the light emitting devices LD, which can be located on the same surface of the driving backplane PNL as the light emitting devices LD, for example, the pixel definition layer can be located on the surface of the second planar layer away from the substrate as the first electrode. At the same time, the thickness of the pixel definition layer is greater than the thickness of the first electrode, and the pixel definition layer covers part of the area of each first electrode, and the pixel definition layer has a pixel opening exposing each first electrode. One pixel opening exposes one first electrode.

[0115] The light emitting layer and the second electrode are stacked in sequence on the first electrode in the pixel opening. In some embodiments, the light emitting layer is an intermittent structure, and the light emitting layer of each light emitting device LD is independently spaced apart, and the light emitting colors of different light emitting devices LD can be different; the second electrode is a continuous whole layer structure, and the part of the second electrode located in the pixel opening covers the light emitting layer, and the part of the second electrode located outside the pixel opening can also cover the pixel definition layer. The sum of the thicknesses of the light emitting layer and the second electrode is less than the thickness of the pixel definition layer, so that the second electrode is recessed at the pixel opening.

[0116] As shown in FIG. 5, FIG. 13, FIG. 22 and FIG. 29, the display panel further comprises a packaging layer TFE, which can cover each light emitting device LD to prevent water vapor and oxygen from the outside from corroding the light emitting device LD. In some embodiments of the present disclosure, the packaging layer TFE can adopt a thin film packaging manner, which can comprise a first inorganic layer, an organic layer and a second inorganic layer, wherein:

[0117] The first inorganic layer can cover each light emitting device LD, i.e. the first inorganic layer can cover the surface of the second electrode away from the driving backplane PNL, and for the second electrode with an intermittent structure, the first inorganic layer can also cover the area where the pixel definition layer is not covered by the second electrode; the thickness of the first inorganic layer is less than the thickness of the pixel definition layer, and the first inorganic layer can be recessed at the pixel opening. The material of the first inorganic layer can include inorganic insulating materials such as silicon nitride and silicon oxide.

[0118] The organic layer can be arranged on the surface of the first inorganic layer away from the driving backplane PNL, and the boundary of the orthogonal projection of the organic layer on the driving backplane PNL can be located in the peripheral area WA, so as to ensure that the organic layer can cover each light emitting device LD.

[0119] The second inorganic layer can cover the organic layer and the first inorganic layer not covered by the organic layer, and can block water and oxygen from entering through the second inorganic layer, and can realize planarization through the organic layer with fluidity before curing. The material of the second inorganic layer can include inorganic insulating materials such as silicon nitride and silicon oxide.

[0120] As shown in FIG. 1, FIG. 2, FIG. 5, FIG. 13, FIG. 22 and FIG. 29, the display panel of the present disclosure can realize the functions of finger touch and electromagnetic touch, and a touch function layer TEL can be arranged on the surface of the packaging layer TFE away from the driving backplane PNL. The touch function layer TEL can sense the touch operation of a finger and generate a touch sensing signal; the touch sensing signal can be processed by a touch chip TIC to determine the touch position. The touch chip TIC can be arranged in the fan-out area FA and bonded with the bonding part, or can be arranged on the driving circuit board PC. At the same time, the electromagnetic signal of an input device 20 such as an electromagnetic pen which can emit electromagnetic signals can also be sensed, and the electromagnetic sensing signal can be generated when the input device 20 moves. The electromagnetic sensing signal can be processed by an electromagnetic chip EIC to determine the position of the input device 20. The electromagnetic chip EIC can be arranged in the fan-out area FA and bonded with the bonding part, or can be arranged on the driving circuit board PC. The touch chip TIC, the electromagnetic chip EIC and the display chip DIC in the above can be arranged independently, and of course, two or three of the touch chip TIC, the electromagnetic chip EIC and the display chip DIC can be integrated in one chip.

[0121] The touch function layer TEL will be described in detail as follows:

[0122] The touch function layer TEL can adopt a capacitive touch structure and an electromagnetic induction structure, wherein:

[0123] The capacitive touch structure can be a mutual capacitance structure or a self-capacitance structure. The touch function layer TEL can include a plurality of touch electrodes TP, at least part of the touch electrodes TP being located in the display area AA. The touch electrodes TP can sense a change in capacitance caused by a finger and generate a touch sensing signal. The plurality of touch electrodes TP and the touch lead TL are connected, and the touch lead TL extends to the fan-out area FA. The touch lead TL can be connected to the conductive pad PA to transmit the touch sensing signal.

[0124] Taking the self-capacitance structure as an example, as shown in FIGS. 4, 12, 21 and 28, the touch function layer TEL can include a plurality of touch electrodes TP, each of which can be arrayed in the display area AA along the row direction X and the column direction Y. The number of touch leads TL can be the same as the number of touch electrodes TP, one end of each touch lead TL is connected to one touch electrode TP, and the other end can extend to the fan-out area FA through the display area AA. The shape of the touch electrode TP can be rectangular or other polygonal. Each touch electrode TP can be disposed in the same layer, and the touch lead TL can be disposed in the same layer as the touch electrode TP or in different layers. The touch electrode TP and the finger can generate a capacitance, and when the finger touches, the capacitance of the touch area changes, thereby generating a touch sensing signal.

[0125] Taking the mutual capacitance structure as an example, the touch function layer TEL can include a plurality of touch electrodes, including a plurality of first touch electrodes and second touch electrodes. Each first touch electrode can extend along the row direction X and be spaced apart along the column direction Y. Each second touch electrode can extend along the column direction Y and be spaced apart along the row direction X, so that each second touch electrode intersects with the first touch electrode, and the two are insulatively disposed at the intersection. The first touch electrode can include a plurality of first electrode blocks connected in sequence along the row direction X, and the second touch electrode can include a plurality of second electrode blocks connected in sequence along the column direction Y. The first electrode block and the second electrode block can be disposed in the same layer. In the area where the second touch electrode intersects with the first touch electrode, the second touch electrode and the first touch electrode are located in different layers to achieve insulative disposition.

[0126] The number of touch leads can be the same as the number of touch electrodes, and the touch leads include first touch leads and second touch leads. One end of each first touch lead is connected to one first touch electrode, and the other end can extend to the fan-out area FA through the display area AA. One end of each second touch lead is connected to one second touch electrode, and the other end can extend to the fan-out area FA through the display area AA.

[0127] One of the first touch electrode and the second touch electrode can be used as a transmitting electrode, and the other can be used as a receiving electrode. The receiving electrode can receive a driving signal, and a capacitance can be formed between the adjacent first electrode block and the second electrode block. When a finger touches, the capacitance of the touch area can change, and the transmitting electrode can emit a touch sensing signal.

[0128] In some embodiments of the present disclosure, the touch electrode TP can be a grid structure having a plurality of meshes. The grid structure can be connected by grid lines. One mesh can be surrounded by a plurality of grid lines, and one mesh can overlap at least one light emitting device, so that the light emitted by the light emitting device can pass through the mesh. The shape of the mesh can be circular, oval, rectangular, diamond, pentagon, or other polygon. In order to avoid affecting the light emission of the light emitting device LD, the shape of the mesh can be the same as the pixel opening, and one mesh can overlap one or more light emitting devices LD to allow light to pass through.

[0129] In some embodiments of the present disclosure, the touch electrode TP and the touch lead TL are located in different layers, that is, the touch lead TL and the touch electrode TP are distributed in the direction away from or close to the driving back plate PNL. At this time, the touch lead TL can be overlapped with the touch electrode TP, and then connected through the contact hole, without making the touch lead TL wire from the outside of the touch electrode TP.

[0130] Further, as shown in FIG. 12 and FIG. 21, for a column of touch electrodes TP, one touch lead TL connected to one touch electrode TP can overlap with each touch electrode TP close to one side of the fan-out area FA. The length of each touch lead TL connected to the same column of touch electrodes TP decreases in the direction close to the fan-out area FA, and each touch lead TL is distributed in the row direction X to avoid short circuit. Of course, the touch lead TL connected to the touch electrode TP closest to the fan-out area FA only overlaps with the touch electrode TP.

[0131] In some embodiments of the present disclosure, the touch electrode TP and the touch lead TL can be arranged in the same layer. At this time, one touch lead TL can be connected to the edge of one touch electrode TP, and the touch lead TL can be wired outside the touch electrode TP, so that the touch lead TL and the column of touch electrodes TP in which the touch electrode TP is located do not overlap.

[0132] The electromagnetic induction structure described above can include a plurality of induction coils and induction leads, the induction coils can be connected with the induction leads, and the induction leads extend to the fan-out area FA and can be connected with the conductive pads PA. The induction coils can be an open coil structure having a gap EH that disconnects the induction coils, and the induction leads can be connected with both ends of the gap EH to transmit the electromagnetic induction signals. Specifically, both ends of the gap EH can serve as connection terminals, each induction lead can include two independent induction lines that are connected with the two connection terminals one-to-one and extend to the fan-out area FA, and one induction line can be connected with one conductive pad PA. An electric circuit is formed by the induction lines of the induction leads and the induction coils, and when the input device 20 approaches the area on the display panel corresponding to the induction coils, the induction coils generate electromagnetic induction signals.

[0133] For an induction coil having a gap EH, the induction coil can be regarded as a "C" type structure having the gap EH, and the direction of the gap EH of the "C" type structure is the direction of the induction coil.

[0134] As shown in FIGS. 2, 4, 12, 21, and 28, in some embodiments of the present disclosure, the induction coils include a plurality of first induction coils EM1 and a plurality of second induction coils EM2. Each first induction coil EM1 can be rectangular and extend along the row direction X and be spaced apart along the column direction Y. Each second induction coil EM2 can be rectangular and extend along the column direction Y and be spaced apart along the row direction X. Meanwhile, each first induction coil EM1 can be arranged in the same layer, each second induction coil EM2 can be arranged in the same layer, and the first induction coils EM1 and the second induction coils EM2 are arranged in different layers. One first induction coil EM1 can cross a plurality of second induction coils EM2 in space at the same time, and one second induction coil EM2 can cross a plurality of first induction coils EM1 in space at the same time. When the input device 20 that generates a magnetic field moves, the first induction coils EM1 and the second induction coils EM2 cut the magnetic induction lines to generate electromagnetic induction signals. The electromagnetic induction signals generated by the first induction coils EM1 and the second induction coils EM2 having different extension directions can determine the position corresponding to the input device 20.

[0135] The induction coils each include the notch EH described above, and the notch EH of the first induction coil EM1 can face one side of the display area AA along the row direction X; the notch EH of the second induction coil EM2 can face the fan-out area FA along the column direction Y. Correspondingly, the induction leads can include first induction leads EL1 and second induction leads EL2; a first induction lead EL1 is connected with a first induction coil EM1, and a second induction lead EL2 is connected with a second induction coil EM2. Further, each first induction lead EL1 includes two first induction lines EL11, and the two first induction lines EL11 are respectively connected with two ends of the notch EH of the first induction coil EM1; each second induction lead EL2 includes two second induction lines EL21, and the two second induction lines EL21 are respectively connected with two ends of the notch EH of the second induction coil EM2.

[0136] It should be noted that the induction coil and the induction lead connected therewith are located in the same layer and are an integral structure, that is, the induction coil and the induction lead connected therewith can be formed by winding along the same trace, and the two can have no visible physical boundary.

[0137] As shown in FIGS. 12, 21 and 28, the first induction leads EL1 and the second induction leads EL2 can extend to the fan-out area FA from one side or both sides of the display area AA. In some embodiments of the present disclosure, the notches EH of two adjacent first induction coils EM1 face opposite directions, that is, the notches EH face two sides of the display area AA, and correspondingly, the first induction leads EL1 connected with the two adjacent first induction coils EM1 are located on the two sides of the display area AA, which can avoid that the first induction leads EL1 are all located on the same side of the display area AA, and can avoid that the traces are too dense. Of course, in other embodiments, the notches EH of two adjacent first induction coils EM1 face the same direction, and each first induction lead EL1 is located on the same side of the display area AA, which is beneficial to narrow the frame on the side where the first induction leads EL1 are not arranged.

[0138] The touch function layer TEL can include a plurality of conductive layers, and each conductive layer is distributed in a direction away from the driving back plate PNL. Each conductive layer can be a single layer or a multi-layer structure, and the material thereof can include titanium, aluminum, molybdenum, silver, copper and other metals, can also include indium tin oxide and other metal oxides, and can also include other conductive materials, which are not specially limited here. For example, at least one conductive layer can include three sub-layers stacked in order in a direction away from the driving back plate PNL, and the materials of the three sub-layers in the direction away from the driving back plate PNL are titanium, aluminum and titanium respectively, or molybdenum, aluminum and molybdenum. In addition, adjacent conductive layers can be separated by an insulating layer.

[0139] The touch electrode TP, the induction coil, the touch lead TL and the induction lead are distributed in the plurality of conductive layers, and the touch electrode TP and the induction coil at most partially overlap. Thus, the two functions of finger touch and electromagnetic touch can be integrated in the same display panel through the touch function layer TEL, that is, human-computer interaction can be realized through the finger, and human-computer interaction can also be realized through the input device 20. At the same time, the touch electrode TP and the induction coil are independently arranged, so that the touch electrode TP is not reused as the induction coil, and the induction coil is not reused as the touch electrode TP, so that the two can work at the same time without time-sharing work.

[0140] In some embodiments of the present disclosure, a touch electrode TP can be located within a range surrounded by an induction coil, which can be the first induction coil EM1 or the second induction coil EM2. If the induction coil and the touch electrode TP are located in different layers, the overlap between the touch electrode TP and the induction coil can be avoided, which is beneficial to reduce the signal interference between the two; if the induction coil and the touch electrode TP are arranged in the same layer, the short circuit between the two can be avoided. Of course, for the induction coil and the touch electrode TP located in different layers, there can be at least partial overlap between the induction coil and the touch electrode TP, which is beneficial to reduce the gap between the touch electrodes TP, and in the case of unchanged size of the touch electrode TP, it is beneficial to arrange more touch electrodes TP.

[0141] It should be noted that the above-mentioned touch electrode TP located within the range surrounded by the induction coil means that the orthographic projection of the touch electrode TP on the drive back plate PNL is located within the range surrounded by the orthographic projection of the induction coil on the drive back plate PNL, and the two do not coincide. If the induction coil and the touch electrode TP are arranged in the same layer, the induction coil can be located between the touch electrodes TP.

[0142] As shown in FIGS. 5, 13, 22 and 29, in some embodiments of the present disclosure, the number of conductive layers can be two, and include a first conductive layer ML1 and a second conductive layer ML2 distributed in a direction away from the drive back plate PNL; the touch electrode TP, the induction coil, the touch lead TL and the induction lead are distributed in the first conductive layer ML1 and the second conductive layer ML2, wherein the induction coil includes a first induction coil EM1 and a second induction coil EM2 located in different layers, and the induction lead includes a first induction lead EL1 and a second induction lead EL2.

[0143] In addition, the touch function layer TEL can further include a first insulating layer IS1, a second insulating layer IS2 and a third insulating layer IS3, wherein:

[0144] The first insulating layer IS1 can be arranged on the surface of the encapsulation layer away from the driving back plate PNL, and can be made of inorganic materials such as silicon nitride, silicon oxide, silicon oxynitride, or organic materials such as optical glue. The first conductive layer ML1 can be arranged on the surface of the first insulating layer IS1 away from the driving back plate PNL.

[0145] The second insulating layer IS2 can cover the first conductive layer ML1, and can be made of inorganic materials such as silicon nitride, silicon oxide, silicon oxynitride, or organic materials such as optical glue. The second conductive layer ML2 can be arranged on the surface of the second insulating layer IS2 away from the driving back plate PNL.

[0146] The third insulating layer IS3 can cover the second conductive layer ML2, and can be made of inorganic materials such as silicon nitride, silicon oxide, silicon oxynitride, or organic materials such as optical glue.

[0147] In addition, as shown in FIGS. 5, 13, 22 and 29, the display panel can further include an anti-reflection layer POL and a transparent cover plate CG, wherein:

[0148] The anti-reflection layer POL is arranged on the side of the touch function layer TEL away from the driving back plate PNL, and can be used to reduce the reflection of ambient light by the second electrode and other film layers. The anti-reflection layer POL can be a circular polarizer, which can prevent the second electrode and other film layers from reflecting ambient light out. The specific structure is not described in detail here. Alternatively, the anti-reflection layer POL can also be made of a light filtering material to reduce the reflection of ambient light. For example, the anti-reflection layer POL can include a plurality of light filtering portions and light absorbing portions separating the light filtering portions. One light filtering portion can overlap one light emitting device, and the color of the light filtering portion can be the same as the light emitting color of the light emitting device overlapping it. Through the light filtering portion, the ambient light irradiating the second electrode and other film layers can be reduced, and the ambient light reflected by the second electrode and other film layers is difficult to exit.

[0149] The transparent cover plate CG can be arranged on the side of the anti-reflection layer POL away from the driving back plate PNL, which can play a protective role, and can be bonded to the surface of the anti-reflection layer POL away from the driving back plate PNL through the adhesive layer OC.

[0150] In addition, as shown in FIG. 5, FIG. 13, FIG. 22 and FIG. 29, the display panel can further include a support layer SU which can be attached to the side of the driving back plate PNL away from the light emitting device, for improving the strength of the display panel, and can also serve the function of heat dissipation, etc. For example, the support layer SU can include, in sequence from the side of the driving back plate PNL, an adhesive layer, a buffer layer, a reinforcing layer and a heat dissipation layer, wherein the adhesive layer can be made of a material having an adhesive function such as grid glue. The buffer layer can be made of a flexible material such as foam. The reinforcing layer can be used to improve the strength so that it is not easily broken or damaged, and the material of the reinforcing layer can be polyimide or other flexible material. The heat dissipation layer can be made of copper or other metal with good heat conduction performance, or can also be made of graphene or other material. Of course, the stacking order of the above-mentioned adhesive layer, buffer layer, reinforcing layer and heat dissipation layer can be changed, and one or more of them can also be omitted; in addition, in some embodiments, the support layer SU can also not be provided.

[0151] The touch function layer TEL will be described below according to the film layers in which the touch electrodes TP, the touch lead lines TL, the induction coils and the induction lead lines are located:

[0152] As shown in FIG. 4-FIG. 11, in the first embodiment of the present disclosure, the first induction coil EM1 and the first induction lead line EL1 are arranged in the same layer; the touch electrodes TP, the touch lead lines TL, the second induction coil EM2 and the second induction lead line EL2 are arranged in the same layer and are located in different layers from the first induction coil EM1 and the first induction lead line EL1. For example, the first induction coil EM1 and the first induction lead line EL1 are located in the first conductive layer ML1, and the two first induction lines of the first induction lead line EL1 are also located in the first conductive layer ML1. The touch electrodes TP, the touch lead lines TL, the second induction coil EM2 and the second induction lead line EL2 are located in the second conductive layer ML2, and the two second induction lines of the second induction lead line EL2 are also located in the second conductive layer ML2.

[0153] Further, as shown in FIG. 4, FIG. 6 and FIG. 7, a column of touch electrodes TP and the touch lead lines TL connected thereto are located within the range surrounded by a second induction coil EM2 in the display area AA, and accordingly, one segment of a second induction coil EM2 is arranged on each side of the column of touch electrodes TP. In some embodiments, among the touch lead lines TL of any two columns of touch electrodes TP, each touch lead line TL can be located on the same side of the touch electrode TP connected thereto, for example, the touch lead lines TL are all located on the right side of the touch electrode TP connected thereto. Of course, the touch lead lines TL can also be located on both sides of the touch electrode TP connected thereto.

[0154] Further, in some embodiments, as shown in FIG. 4 and FIG. 8, a row of touch electrodes TP overlaps a first induction coil EM1, that is, the orthogonal projection of a first induction coil EM1 on the drive back plate PNL passes through the orthogonal projection of a row of touch electrodes TP on the drive back plate PNL along the row direction X, instead of being located outside the orthogonal projection of a row of touch electrodes TP on the drive back plate PNL. In this way, the distance between two adjacent rows of touch electrodes TP can be reduced, for example, the distance between two adjacent rows of touch electrodes TP is less than the distance between two adjacent columns of touch electrodes TP.

[0155] In the above first embodiment, the touch lead TL is located within the range surrounded by the second induction coil EM2 in the same layer, and the two do not cross, and the second induction lead EL2 also does not cross; and the first induction coil EM1 is located in the first conductive layer ML1, which is different from the touch electrode TP, the touch lead TL, the second induction coil EM2 and the second induction lead EL2 in the same layer, and even if there is an overlap, it will not short circuit, so in this embodiment there is no cross in the same layer, so the insulation of the cross in the same layer by the cross-layer jumper can be avoided, which is beneficial to simplify the structure, reduce the process difficulty, and also avoid the signal interference caused by the cross-layer in the cross region.

[0156] It should be noted that, in order to ensure the clarity of the various traces in the drawings, not all first induction leads EL1 are shown in FIG. 4, but this does not mean that they do not exist, so some of the first induction leads EL1 in the cross-sectional views of FIG. 6-FIG. 11 are omitted in FIG. 4, but this does not affect those skilled in the art based on the understanding of the technical solutions according to the text description and the drawings, and according to the directly described content, it can be known that the technical solutions of the present disclosure can be implemented in the case of omission. In addition, similar omissions may also exist in other drawings of the present disclosure, which will not be specifically described here.

[0157] As shown in FIG. 12-FIG. 20, in the second embodiment of the present disclosure, the second induction coil EM2 and the second induction lead EL2 are located in the first conductive layer ML1, and both of the two second induction leads of the second induction lead EL2 are located in the first conductive layer ML1. The touch electrode TP is located in the second conductive layer ML2, and at least part of at least one of the touch lead TL, the first induction coil EM1 and the first induction lead EL1 is located in the second conductive layer ML2, for example:

[0158] As shown in FIG. 12, the touch lead TL is located on one side of the touch electrode TP to which it is connected, and can extend to the fan-out area FA along the column direction Y. The first induction coil EM1 intersects the touch lead TL, and in order to avoid short circuit between the two, one of the first induction coil EM1 and the touch lead TL can be jumpered to the first conductive layer ML1 at the intersection, i.e., the first induction coil EM1 or the touch lead TL is formed by the second conductive layer ML2 and the first conductive layer together. Meanwhile, at least part of the first induction lead EL1 intersects the touch lead TL, and in order to avoid short circuit between the two, one of the first induction lead EL1 and the touch lead TL can be jumpered to the first conductive layer ML1 at the intersection, i.e., the first induction lead EL1 or the touch lead TL is formed by the second conductive layer ML2 and the first conductive layer together.

[0159] In some embodiments, as shown in FIG. 17, the touch lead TL is located on the second conductive layer ML2. At least part of the first induction coil EM1 includes a plurality of induction conductive segments EMm located on the second conductive layer ML2 and an induction connection segment EMc located on the first conductive layer ML1. Adjacent two induction conductive segments EMm are connected to the same induction connection segment EMc through a contact hole passing through the second insulating layer IS2, and each induction conductive segment EMm is connected through the induction connection segment EMc. The touch lead TL overlaps the induction connection segment EMc and is spaced apart from the induction conductive segment EMm, that is, the touch lead TL can pass between two induction conductive segments EMm and intersect the induction connection segment EMc in space, thereby achieving insulation while intersecting the first induction coil EM1. The intersection and insulation with the touch lead TL are achieved by the cross-layer jumpering of the first induction coil EM1.

[0160] In some embodiments, the touch lead TL is located on the second conductive layer ML2. At least part of the first induction lead EL1 can include a plurality of induction lead segments located on the second conductive layer ML2 and a lead connection segment located on the first conductive layer ML1. Adjacent two induction lead segments are connected to the same lead connection segment through a contact hole passing through the second insulating layer IS2, and each induction lead segment is connected through the lead connection segment. The touch lead TL overlaps the lead connection segment and is spaced apart from the induction lead segment, that is, the touch lead TL can pass between two induction lead segments and intersect the lead connection segment in space, thereby achieving insulation while intersecting the first induction lead EL1. The intersection and insulation with the touch lead TL are achieved by the cross-layer jumpering of the first induction lead EL1. The specific jumpering principle can refer to the cross-layer jumpering manner of the first induction coil EM1 in FIG. 17.

[0161] Of course, in other embodiments of the present disclosure, the first induction coil EM1 and the first induction lead EL1 can be located in the second conductive layer ML2, the touch lead TL can be divided into multiple segments, and each segment can be arranged in the first conductive layer ML1 and the second conductive layer ML2, respectively, so as to realize the crossing and insulation of the first induction coil EM1 and the first induction lead EL1 through the layer-jumping of the touch lead TL.

[0162] In some embodiments of the present disclosure, as shown in FIG. 12, a row of touch electrodes TP is located within the range surrounded by a first induction coil EM1 in the display area AA, and accordingly, a segment of the first induction coil EM1 is arranged on each side of the row of touch electrodes TP, so that the first induction coil EM1 does not overlap the touch electrodes TP.

[0163] A column of touch electrodes TP and the touch leads TL connected thereto are located within the range surrounded by a second induction coil EM2 in the display area AA, and accordingly, a segment of the second induction coil EM2 is arranged on each side of the column of touch electrodes TP. In some embodiments, among the touch leads TL of any two columns of touch electrodes TP, each touch lead TL can be located on the same side of the touch electrode TP connected thereto, for example, the touch leads TL are all located on the right side of the touch electrodes TP connected thereto. Of course, the touch leads TL can also be located on both sides of the touch electrodes TP connected thereto.

[0164] As shown in FIGS. 21-27, in a third embodiment of the present disclosure, the touch lead TL, the second induction coil EM2, and the second induction lead EL2 are arranged in the same layer; the touch electrode TP, the first induction coil EM1, and the first induction lead EL1 are arranged in the same layer and are located in different layers from the touch lead TL, the second induction coil EM2, and the second induction lead EL2. For example, the touch lead TL, the second induction coil EM2, and the second induction lead EL2 are located in the first conductive layer ML1, and both second induction lines of the second induction lead EL2 are located in the first conductive layer ML1; the touch electrode TP, the first induction coil EM1, and the first induction lead EL1 are located in the second conductive layer ML2, and both first induction lines of the first induction lead EL1 are located in the second conductive layer.

[0165] In some embodiments of the present disclosure, the touch electrodes TP and the touch leads TL are located in different layers, the touch leads TL are arranged to overlap the touch electrodes TP, and the touch electrodes TP can be connected to the touch leads TL through contact holes passing through the second insulating layer IS2. For a column of touch electrodes TP: the touch leads TL connected to the touch electrodes TP in the column extend along the column direction Y and are spaced apart along the row direction X. Correspondingly, the contact holes connecting the touch electrodes TP and the touch leads TL are also distributed along the row direction X and not located on a straight line in the column direction Y. Each touch lead TL overlaps the column of touch electrodes TP, so that the space between two adjacent columns of touch electrodes TP can not be provided with a touch lead TL, which is conducive to reducing the spacing between two adjacent columns of touch electrodes TP.

[0166] The lengths of the touch leads TL connected to the touch electrodes TP in the same column can be the same, and the length of each touch lead TL is not less than the length of the touch lead TL connected to the touch electrode TP farthest from the fan-out area FA, so that the touch leads TL with different lengths do not need to be arranged, which is conducive to improving the uniformity of the film layer, so that the number of touch leads TL under each touch electrode TP in the same column of touch electrodes TP is the same, which is conducive to keeping the touch electrodes TP flat. Of course, in other embodiments of the present disclosure, the lengths of the touch leads TL connected to the touch electrodes TP in the same column can be different, and the touch leads TL connected to the touch electrodes TP closer to the fan-out area FA are shorter.

[0167] In some embodiments of the present disclosure, a row of touch electrodes TP is located within the range surrounded by a first induction coil EM1 in the display area AA, and correspondingly, one segment of the first induction coil EM1 is arranged on each side of the row of touch electrodes TP, so that the first induction coil EM1 does not overlap the touch electrodes TP. At the same time, a column of touch electrodes TP and the touch leads TL connected thereto are located within the range surrounded by a second induction coil EM2 in the display area AA, and correspondingly, one segment of the second induction coil EM2 is arranged on each side of the column of touch electrodes TP.

[0168] In the above third embodiment, the second induction coil EM2 located in the same layer as the touch leads TL is within the range surrounded by the second induction coil EM2, and the second induction coil EM2 and the touch leads TL do not cross each other. The second induction coil EM2, the touch electrodes TP, the first induction coil EM1 and the first induction lead EL1 are located in different layers, and even if there is overlap, it will not cause short circuit. Therefore, in the present embodiment, there is no cross of the same layer wiring, so that the insulation of the cross wiring of the same layer can be realized by the cross-layer jumper, which is conducive to simplifying the structure, reducing the process difficulty, and also avoiding the signal interference caused by the cross-layer in the cross area.

[0169] As shown in FIGS. 28-34, in the fourth embodiment of the present disclosure, the touch electrodes TP, the second induction coil EM2 and the second induction lead EL2 are located in the second conductive layer ML2, and the two second induction lines of any second induction lead EL2 are located in the second conductive layer ML2.

[0170] At least part of at least one of the touch leads TL, the first induction coil EM1 and the first induction lead EL1 is located in the first conductive layer ML1, for example: the touch electrodes TP and the touch leads TL are located in different layers, one touch lead TL and the touch electrodes TP connected thereto overlap and can be connected through the contact hole passing through the second insulating layer IS2, the relationship between the touch leads TL and the touch electrodes TP can refer to the third embodiment above, and will not be described in detail here.

[0171] The first induction coil EM1 crosses the touch leads TL, in order to avoid short circuit between the two, one of the first induction coil EM1 and the touch leads TL can be jumpered to the second conductive layer ML2 at the crossing, that is, the first induction coil EM1 or the touch leads TL is formed by the second conductive layer ML2 and the first conductive layer together. At the same time, at least part of the first induction lead EL1 crosses the touch leads TL, in order to avoid short circuit between the two, one of the first induction lead EL1 and the touch leads TL can be jumpered to the second conductive layer ML2 at the crossing, that is, the first induction lead EL1 or the touch leads TL is formed by the second conductive layer ML2 and the first conductive layer together.

[0172] In some embodiments, as shown in FIG. 31, the touch leads TL are located in the first conductive layer ML1. At least part of the first induction coil EM1 includes a plurality of induction conductive segments EMm located in the first conductive layer ML1 and an induction connecting segment EMc located in the second conductive layer ML2. Adjacent two induction conductive segments EMm are connected with the same induction connecting segment EMc through the contact hole passing through the second insulating layer IS2, and each induction conductive segment EMm is connected through the induction connecting segment EMc. The touch leads TL overlap the induction connecting segment EMc and are spaced apart from the induction conductive segments EMm, that is, the touch leads TL can pass between two induction conductive segments EMm and cross the induction connecting segment EMc in space, thereby achieving insulation while crossing the first induction coil EM1. The crossing and insulation of the touch leads TL and the first induction coil EM1 are achieved through the cross-layer jumpering of the first induction coil EM1.

[0173] Of course, in other embodiments of the present disclosure, the first induction coil EM1 is located in the first conductive layer ML1, the touch leads TL can be divided into multiple segments and arranged in the first conductive layer ML1 and the second conductive layer ML2 respectively, and the crossing and insulation of the touch leads TL and the first induction coil EM1 are achieved through the cross-layer jumpering of the touch leads TL.

[0174] In some embodiments of the present disclosure, as shown in FIG. 28, a row of touch electrodes TP is located within the range surrounded by a first induction coil EM1 in the display area AA, and a segment of the first induction coil EM1 is arranged on each side of the row of touch electrodes TP, so that the first induction coil EM1 does not overlap the touch electrodes TP. Meanwhile, a column of touch electrodes TP and the touch leads TL connected thereto are located within the range surrounded by a second induction coil EM2 in the display area AA, and a segment of the second induction coil EM2 is arranged on each side of the column of touch electrodes TP.

[0175] In addition, in other embodiments of the present disclosure, the first induction coil EM1 and the first induction lead EL1 can also be located in different layers, and the second induction coil EM2 and the second induction lead EL2 can also be located in different layers, that is, the touch electrodes TP, the touch leads TL, the first induction coil EM1 and the first induction lead EL1, and the second induction coil EM2 and the second induction lead EL2 can be distributed in the first conductive layer ML1 and the second conductive layer ML2 in any reasonable manner, not limited to the above four embodiments.

[0176] In addition, in some embodiments of the present disclosure, as shown in FIG. 43, the first induction lead EL1 can extend directly from the display area AA to the fan-out area FA along the column direction Y. For example, the notch EH of the first induction coil EM1 faces the fan-out area FA along the column direction Y, instead of facing the side of the display area AA along the row direction X, and the two first induction leads EL11 of the first induction lead EL1 are connected to the two ends of the notch EH respectively.

[0177] As shown in FIG. 35, in some embodiments of the present disclosure, when the induction coil and the touch electrode TP are located in different layers and overlap, in order to reduce signal interference, a through hole TPh can be formed in the region where the touch electrode TP and the induction coil overlap, so that the induction coil overlaps the through hole TPh, thereby reducing the effective overlapping area between the two, reducing coupling, and reducing signal interference. The shape of the through hole TPh can be circular, arched, oval, waist-shaped, or can be rhombic, rectangular, or other polygonal shapes, which are not specially limited here.

[0178] Further, in some embodiments, as shown in FIG. 35, the induction coil can extend along a specified direction, which can be the row direction X or the column direction Y. The touch electrode TP is provided with a plurality of through holes TPh distributed at intervals along the specified direction, and the induction coil overlaps each through hole TPh at the same time, so that the overlapping area of the induction coil and the touch electrode TP can be reduced through the plurality of through holes TPh. At the same time, the size of the through hole TPh in the direction perpendicular to the specified direction is greater than the line width of the induction coil, which can further reduce the overlapping area of the induction coil and the touch electrode TP.

[0179] The shape of the boundary of the orthographic projection of the through hole TPh on the driving back plate BP can be circular, elliptical, polygonal or other shapes, which are not particularly limited herein. Further, the through hole TPh has a dimension in the extension direction of the inductive coil overlapping therewith smaller than that in the direction perpendicular to the extension direction, so as to ensure that the inductive coil does not exceed the boundary of the through hole TPh; therefore, the through hole TPh can have an elliptical shape, a waist-round shape or the like.

[0180] As shown in FIG. 35, in some embodiments of the present disclosure, the boundary of the orthographic projection of the through hole TPh on the driving back plate BP comprises two arc segments TPh1 and a straight segment TPh2 connecting the two arc segments TPh1; the straight segment TPh2 overlaps the inductive coil, and the extension direction of the straight segment TPh2 is perpendicular to the extension direction of the inductive coil overlapping therewith; further, the number of the straight segments TPh2 can be two, and the two arc segments TPh1 are connected by the two straight segments TPh2 to form a closed figure; the arc segment TPh1 is tangent to the straight segment TPh2, and the closed figure is a waist-round shape.

[0181] In some embodiments, the boundary of the touch electrode TP can be a polygon having a side extending linearly in a specified direction, that is, the arrangement direction of the through hole TPh is the same as the extension direction of one side of the touch electrode TP.

[0182] Further, as shown in FIG. 35, in some embodiments, a break TPc can be arranged in the touch electrode TP between two adjacent through holes TPh in the same row of through holes TPh, and the break TPc can connect the two through holes TPh. A break TPc can also be arranged in the edge of the touch electrode TP corresponding to one or two outermost through holes TPh in a row of through holes TPh, so as to connect the one or two through holes TPh to the outside. The inductive coil can overlap the break TPc, and the overlapping area of the inductive coil and the touch electrode TP can be further reduced through the break TPc. The width of the break TPc is not less than the line width of the inductive coil.

[0183] When the break TPc is arranged, it should be ensured that the touch electrode TP is not completely cut off, and the number of the breaks TPc is not greater than the number of the through holes TPh in the same row. Meanwhile, since the break TPc will cut off part of the touch electrode TP, the area connecting the two sides of the through hole TPh is reduced, resulting in an increased resistance. Therefore, in order to avoid excessively large resistance, the number of the breaks TPc can be limited, for example, the number of the breaks TPc can be not greater than 2, so as to reduce the overlapping area while preventing excessively large resistance.

[0184] As shown in FIG. 35, taking the first embodiment in the above text as an example, the boundary of the touch electrode TP is in a rectangular shape, and the first induction coil EM1 overlaps with a row of touch electrodes TP in the row direction X. In a row of touch electrodes TP and the first induction coil EM1 overlapping with the row of touch electrodes TP, a plurality of through holes TPh can be arranged on the touch electrode TP, and the plurality of through holes TPh can be arranged in two rows, the number of through holes TPh in each row is the same, and the first induction coil EM1 has two segments distributed along the column direction Y and extending along the row direction X, and the two segments overlap with the two rows of through holes TPh respectively. At least part of the through holes TPh are in a waist-round shape.

[0185] In addition, as shown in FIG. 36, in some embodiments of the present disclosure, dummy electrodes TPd can be arranged in the through holes TPh, the dummy electrodes TPd are arranged in the same layer as the touch electrodes TP and are spaced apart, so that the dummy electrodes TPd are floating, that is, not connected to any electrical signal; the first induction coil EM1 overlaps with the dummy electrodes TPd at the same time of overlapping with the through holes TPh. The dummy electrodes TPd can reduce the hollowed-out area in the through holes TPh, which is conducive to improving the uniformity of the film layer and avoiding the collapse of the first induction coil EM1; at the same time, since the dummy electrodes TPd are floating, they will not interfere with the signals of the touch electrodes TP and the first induction coil EM1.

[0186] Further, as shown in FIG. 36, the shape of the dummy electrode TPd can be the same as that of the through hole TPh, so that the gap between the two is uniformly extended. The dummy electrode TPd can also adopt a grid structure, that is, have a plurality of mesh holes, and the grid structure can be connected by grid lines, one mesh hole can be surrounded by a plurality of grid lines, and during manufacturing, the dummy electrode TPd and the touch electrode TP can adopt the same grid structure, and by partially disconnecting, that is, by disconnecting part of the grid lines, the spaced dummy electrodes TPd and the touch electrodes TP are obtained. Of course, the dummy electrode TPd and the touch electrode TP can also adopt a structure without mesh holes.

[0187] In some embodiments of the present disclosure, as shown in FIGS. 37-42, the boundary of the touch electrode TP is in a polygonal shape, part of the touch electrode TP is located within the range surrounded by the induction coil, and is arranged in the same layer as the induction coil surrounding the touch electrode TP. The boundary of the touch electrode TP close to the induction coil surrounding the touch electrode TP has a plurality of recessed areas TPs, and the distance between the touch electrode TP and the induction coil can be increased through the recessed areas TPs, so as to reduce signal coupling and interference.

[0188] For the shape of the recessed area TPs, the inventors have proposed a variety of schemes, for example:

[0189] The first type of recessed area

[0190] As shown in FIGS. 37-41, the orthographic projection of the recessed area TPs on the driving back plate PNL can be an arc, which can be a circular arc or an elliptical arc. The boundaries of the orthographic projection of two adjacent recessed areas TPs on the driving back plate PNL intersect; for example, as shown in FIGS. 37 and 38, the boundaries of the orthographic projection of two adjacent recessed areas TPs on the driving back plate PNL and their extensions can be two tangent circles with the same radius, as shown in FIGS. 39 and 40, or two intersecting circles with the same radius. This structure can be considered as cutting the edges S1 of a rectangular touch electrode TP. In the first type of recessed area TPs, the range of the recessed area TPs is large, which can minimize the distance from the adjacent inductive coil, thereby reducing signal coupling and interference.

[0191] Second type of recessed area

[0192] As shown in FIG. 42, the recessed area TPs can divide the boundary of the touch electrode TP close to the surrounding inductive coil into a plurality of protrusions protruding towards the inductive coil, and the space between two adjacent protrusions is the recessed area TPs. The orthographic projection of the protrusions on the driving back plate PNL can be an arc, for example, the arc can be a circular arc, and the orthographic projection of the plurality of protrusions on the driving back plate PNL is a tangent or intersecting circular arc. Of course, the orthographic projection of the protrusions on the driving back plate PNL can also be two sides of a trapezoid or two sides of a triangle, and the shape of the protrusions is not specially limited. Although there are protrusions in the second type of recessed area, it can still be considered as cutting the edges of a rectangular touch electrode TP, and it can also reduce the distance from the adjacent inductive coil, thereby reducing signal coupling and interference.

[0193] It should be noted that the shapes of the through holes TPh, the broken sections TPc and the recessed areas TPs are only an overall description of their shapes, and the outlines are not limited to standard geometric shapes. For the dummy electrodes TPd and the touch electrodes TP using a grid structure, the through holes TPh, the broken sections TPc and the recessed areas TPs are formed by breaking part of the grid lines, and thus can not be smooth and continuous linear boundaries.

[0194] The display device can be a television, a notebook computer, a tablet computer, and can also be a display of an electronic whiteboard and the like, and will not be listed one by one here.

[0195] The display device can be a television, a notebook computer, a tablet computer, and can also be a display of an electronic whiteboard and the like, and will not be listed one by one here.

[0196] The structure and function of the display device 10 can refer to the above embodiments of the display panel and the display device, which will not be repeated here. The input device 20 can be used to emit electromagnetic signals, which can be an electromagnetic pen, which has a circuit capable of emitting electronic signals to generate a magnetic field around it. When the input device 20 moves within a certain range on the display device 10, the induction coil cuts the magnetic induction lines to generate an electric signal based on the principle of electromagnetic induction, that is, an electromagnetic induction signal. The position of the input device 20 can be determined by the electromagnetic induction signal, and the electromagnetic touch function is realized.

[0197] Of course, the input device 20 can also be replaced by other devices that can have similar functions as the electromagnetic pen. For example, the electromagnetic touch function can also be realized by setting a circuit capable of generating a magnetic field in a smart glove, a smart bracelet, a smart finger sleeve, etc. wearable device, and the input device 20 is not specially limited here.

[0198] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure that are deemed to fall within the general principles of the disclosure and include commonly known or customary techniques in the art of the disclosure. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the disclosure are indicated by the appended claims.

Claims

1. A display panel, wherein, A display panel has a display area and a peripheral area outside the display area, the peripheral area includes a fan-out area; the display panel includes: a driving backplane; a plurality of light emitting devices arrayed on the driving backplane and located in the display area; an encapsulation layer covering each of the light emitting devices; a touch function layer provided on a surface of the encapsulation layer away from the driving backplane and including a plurality of conductive layers distributed in a direction away from the driving backplane; the touch function layer further includes a plurality of touch electrodes and a plurality of sensing coils located in the display area and independent of each other, and a touch lead and a sensing lead extending to the fan-out area; the touch lead is connected with the touch electrodes; the sensing coils include a plurality of first sensing coils and a plurality of second sensing coils; the first sensing coils and the second sensing coils extend in different directions and are insulated; the sensing lead includes a first sensing lead and a second sensing lead; the first sensing lead is connected with the first sensing coils, and the second sensing lead is connected with the second sensing coils; the touch electrodes, the sensing coils, the touch lead and the sensing lead are distributed in the plurality of conductive layers; each of the first sensing coils is provided in the same layer, each of the second sensing coils is provided in the same layer, and the first sensing lead and the second sensing lead are located in different conductive layers; the touch electrodes and the sensing coils at most partially overlap.

2. The display panel of claim 1, wherein, the conductive layers include a first conductive layer and a second conductive layer distributed in the direction away from the driving backplane in sequence; each of the touch electrodes is provided in the same layer and arrayed in a row direction and a column direction; each of the first sensing coils extends in the row direction, and each of the second sensing coils extends in the column direction; one of the touch electrodes is located within a range surrounded by one of the first sensing coils or one of the second sensing coils.

3. The display panel of claim 2, wherein, the sensing coils have a broken gap, and the sensing lead is connected with both ends of the gap; the gap of the first sensing coil faces one side of the display area in the row direction, and the gaps of two adjacent first sensing coils face in opposite directions; the first sensing lead connecting the two adjacent first sensing coils is located on both sides of the display area; the gap of the second sensing coil faces the fan-out area.

4. The display panel of claim 2, wherein, the sensing coils have a broken gap; the gaps of at least part of the sensing coils located in different layers face the fan-out area; the sensing lead is connected with both ends of the gap, and at least part of the sensing lead extends from the display area to the fan-out area.

5. The display panel of claim 2, wherein, the touch electrodes and the touch lead are located in different layers; one of the touch leads and the touch electrodes connected therewith overlap one column of the touch electrodes.

6. The display panel of claim 2, wherein, the touch electrodes and the touch lead are provided in the same layer; one of the touch leads and the touch electrodes connected therewith do not overlap one column of the touch electrodes.

7. The display panel of claim 2, wherein, the first sensing coil and the first sensing lead are located in the first conductive layer; the touch electrodes, the touch lead, the second sensing coil and the second sensing lead are located in the second conductive layer; A row of the touch electrodes and the touch leads connected thereto are within a range surrounded by a second sensing coil in the display area.

8. The display panel of claim 7, wherein, The distance between two adjacent rows of the touch electrodes is less than the distance between two adjacent columns of the touch electrodes; and a row of the touch electrodes overlaps a first sensing coil.

9. The display panel of claim 2, wherein, The second sensing coil and the second sensing lead are located in the first conductive layer; the touch electrodes are located in the second conductive layer; and at least part of at least one of the touch leads, the first sensing coil and the first sensing lead is located in the second conductive layer. A row of the touch electrodes is within a range surrounded by a first sensing coil in the display area. A column of the touch electrodes and the touch leads connected thereto are within a range surrounded by a second sensing coil in the display area.

10. The display panel of claim 9, wherein, At least part of the first sensing coil includes a plurality of sensing conductive segments located in the second conductive layer and a sensing connection segment located in the first conductive layer; the sensing conductive segments are connected through the sensing connection segment; the touch leads overlap the sensing connection segment and are spaced apart from the sensing conductive segments. At least part of the first sensing lead includes a plurality of sensing lead segments located in the second conductive layer and a lead connection segment located in the first conductive layer; the sensing lead segments are connected through the lead connection segment; the touch leads overlap the lead connection segment and are spaced apart from the sensing lead segments.

11. The display panel of claim 2, wherein, The touch leads, the second sensing coil and the second sensing lead are located in the first conductive layer; the touch electrodes, the first sensing coil and the first sensing lead are located in the second conductive layer. A row of the touch electrodes is within a range surrounded by a first sensing coil in the display area. A column of the touch electrodes and the touch leads connected thereto are within a range surrounded by a second sensing coil in the display area.

12. The display panel of claim 2, wherein, At least part of at least one of the touch leads, the first sensing coil and the first sensing lead is located in the first conductive layer; the touch electrodes, the second sensing coil and the second sensing lead are located in the second conductive layer. A row of the touch electrodes is within a range surrounded by a first sensing coil in the display area. A column of the touch electrodes and the touch leads connected thereto are within a range surrounded by a second sensing coil in the display area.

13. The display panel of claim 12, wherein, At least part of the first sensing coil includes a plurality of sensing conductive segments located in the first conductive layer and a sensing connection segment located in the second conductive layer; the sensing conductive segments are connected through the sensing connection segment; the touch leads overlap the sensing connection segment and are spaced apart from the sensing conductive segments.

14. The display panel of claim 5, wherein, The touch leads connected to the touch electrodes in the same column are spaced apart along the row direction and overlap the touch electrodes connected thereto.

15. The display panel of claim 2, wherein, At least part of the sensing coil overlaps at least part of the touch electrode; The touch electrode overlapping the sensing coil is provided with a through hole, and the sensing coil overlaps the through hole.

16. The display panel of claim 15, wherein, The boundary of the orthographic projection of the through hole on the drive back plate is elliptical; or The boundary of the orthographic projection of the through hole on the drive back plate is elliptical; or The boundary of the normal projection of the through hole on the driving back plate comprises two arc segments and a straight line segment connecting the two arc segments; the straight line segment overlaps the inductive coil, and the extension direction of the straight line segment is perpendicular to the extension direction of the inductive coil.

17. The display panel of claim 15, wherein, The inductive coil extends along a specified direction, and the specified direction is the row direction or the column direction. The touch electrode is provided with a plurality of through holes spaced apart along the specified direction, and the inductive coil overlaps each through hole; the size of the through hole in the direction perpendicular to the specified direction is greater than the line width of the inductive coil.

18. The display panel of claim 17, wherein, The touch electrode is provided with a break connected between two adjacent through holes in the row direction; and / or, the touch electrode is provided with a break connected to the outermost through hole in a row of through holes. The inductive coil overlaps the break.

19. The display panel of claim 15, wherein, The through hole is provided with a dummy electrode arranged in the same layer as the touch electrode, and the dummy electrode is spaced apart from the touch electrode.

20. The display panel of claim 1, wherein, The boundary of the touch electrode is a polygon; part of the touch electrode is located in the range surrounded by the inductive coil, and the boundary of the touch electrode close to the inductive coil has a recessed area.

21. The display panel of claim 20, wherein, The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped.

22. A display device comprising: The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped.

23. A terminal device, wherein, The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of the normal projection of the recessed area on the driving back plate is arc-shaped. The boundary of

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