Display panel, display equipment and preparation method of display panel

Abstract

The invention relates to the technical field of display, in particular to a display panel, and aims to solve the problem that an existing display panel is not beneficial to lightening and thinning when an antenna is arranged. In order to achieve the purpose, the display panel comprises a substrate and a first NFC antenna, the first NFC antenna is arranged on the first surface of the substrate and comprises a multi-turn coil, and the multi-turn coil comprises a first metal wire extending in the first direction and a second metal wire extending in the second direction. The first metal wire and the second metal wire are arranged on different layers on the first surface and are electrically connected through via holes between the different layers, and orthographic projections of the first direction and the second direction on the substrate are crossed. The first metal wire and the second metal wire are electrically connected through the via hole to form the continuous first NFC antenna, so that the first NFC antenna is integrated in the structure of the display panel, the space occupied by the first NFC antenna is reduced, and the structural design of the display panel is lighter and thinner.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and specifically provides a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] Near Field Communication (NFC) is a contactless identification and interconnection technology. It uses near-field magnetic field communication to perform near-field communication among mobile devices, consumer electronics products, PCs, and intelligent control tools. The NFC communication technology provides a simple and touch-based solution that allows consumers to simply and intuitively exchange information, access content, and services.

[0003] The near-field communication technology has been widely applied to electronic devices for data exchange. The NFC communication technology consists of an NFC communication module and an NFC communication antenna. The NFC communication module generally consists of a high-speed single-chip microcomputer, a radio frequency chip, and a matching circuit; the NFC communication antenna is used to transmit and receive electromagnetic wave signals on the device. For existing electronic devices using the NFC communication technology, most of them externally place an independent NFC communication module on the main board of the electronic device, so it requires a large amount of space and is not conducive to the thin and light design. Summary of the Invention

[0004] The present invention aims to solve the problems of the existing technology and provides a display panel, a display device, and a method for manufacturing a display panel.

[0005] In a first aspect, the present invention provides a display panel, including: a substrate; a first NFC antenna disposed on a first surface of the substrate, including a multi-turn coil, wherein the multi-turn coil includes a first metal trace extending in a first direction and a second metal trace extending in a second direction, wherein the first metal trace and the second metal trace are disposed on different layers on the first surface, electrically connected through vias between the different layers, and the first direction and the second direction intersect in the orthographic projection on the substrate.

[0006] In some exemplary embodiments, the first metal trace is disposed on the same layer as the source-drain electrodes of the display panel; the second metal trace is disposed on the same layer as the gate of the display panel.

[0007] In some exemplary embodiments, the first direction is consistent with the extending direction of the source-drain electrodes; the second direction is consistent with the extending direction of the gate.

[0008] In some exemplary embodiments, the display panel includes a first touch electrode and a second touch electrode; the first metal trace is disposed on the same layer as the first touch electrode; the second metal trace is disposed on the same layer as the second touch electrode.

[0009] In some exemplary embodiments, the first direction is consistent with the extending direction of the first touch electrode; the second direction is consistent with the extending direction of the second touch electrode.

[0010] In some exemplary embodiments, the orthographic projection of the multi-turn coil on the substrate forms an annular structure, so that when a current flows through the multi-turn coil, a magnetic field in the same direction is generated in the area surrounded by the annular structure.

[0011] In some exemplary embodiments, the orthographic projection of the multi-turn coil on the substrate at least includes a connected first area and a second area, so that when a circuit current flows through the multi-turn coil, magnetic fields in different directions are generated in the first area and the second area.

[0012] In some exemplary embodiments, the first area and the second area form a jumper area at the connection; around the jumper area, the area where the first metal trace and the second metal trace cross in the first area and the second area forms a wiring area; wherein, in the jumper area, the first metal trace and the second metal trace are electrically insulated from each other; in the wiring area, the first metal trace and the second metal trace are electrically connected through the via.

[0013] In some exemplary embodiments, the distance between the first metal trace located in the jumper area and the adjacent first metal trace located in the wiring area is greater than the distance between adjacent first metal traces in the jumper area and / or the wiring area; the distance between the second metal trace located in the jumper area and the adjacent second metal trace located in the wiring area is greater than the distance between adjacent second metal traces in the jumper area and / or the wiring area.

[0014] In some exemplary embodiments, a second NFC antenna is disposed on a second surface of the substrate opposite to the first surface.

[0015] In a second aspect, the present invention provides a display device, including the above-mentioned display panel.

[0016] In a third aspect, the present invention provides a method for manufacturing a display panel, including: forming a first NFC antenna composed of multi-turn coils on a first surface of a substrate, wherein the multi-turn coils include a first metal trace extending along a first direction and a second metal trace extending along a second direction, wherein the first metal trace and the second metal trace are disposed on different layers on the first surface and are electrically connected through vias between the different layers, and the first direction and the second direction cross in the orthographic projection on the substrate.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The display panel provided by the present invention includes a substrate and a first NFC antenna. The first NFC antenna is disposed on a first surface of the substrate and includes a multi-turn coil. The multi-turn coil includes a first metal trace extending in a first direction and a second metal trace extending in a second direction. The first metal trace and the second metal trace are disposed on different layers on the first surface, and are electrically connected through vias between different layers. The first direction and the second direction intersect in the orthographic projection on the substrate. After the first metal trace and the second metal trace are electrically connected through vias, a continuous first NFC antenna is formed, so that the first NFC antenna is integrated into the structure of the display panel, thereby reducing the space occupied by the first NFC antenna, and making the structural design of the display panel more lightweight and thinner.

[0019] Furthermore, the first metal trace is disposed on the same layer as the source-drain electrodes of the display panel, and the second metal trace is disposed on the same layer as the gate of the display panel. In this way, while saving the manufacturing process, the first NFC antenna is integrated on the array substrate, and at least a part of the first NFC antenna can be arranged in the display area, so as to increase the arrangement space of the first NFC antenna, thereby increasing the number of turns of the coil that can be arranged by the first NFC antenna, and thus increasing the communication distance of the first NFC antenna.

[0020] Furthermore, the display panel includes a first touch electrode and a second touch electrode. The first metal trace is disposed on the same layer as the first touch electrode, and the second metal trace is disposed on the same layer as the second touch electrode. In this way, while saving the manufacturing process, the first NFC antenna is integrated on the touch screen, and at least a part of the first NFC antenna can be arranged in the display area, so as to increase the arrangement space of the first NFC antenna, thereby increasing the number of turns of the coil that can be arranged by the first NFC antenna, and thus increasing the communication distance of the first NFC antenna.

[0021] Furthermore, the orthographic projection of the multi-turn coil on the substrate at least includes a connected first area and a second area, so that when the circuit flows through the coil, magnetic fields in different directions are generated in the first area and the second area, and two adjacent magnetic fields are superimposed on each other to form a magnetic field loop, so as to increase the magnetic field intensity generated by the multi-turn coil and expand the magnetic field range, thereby increasing the communication distance of the NFC antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings, in which:

[0023] Figure 1 is a plan view of a first display panel provided by at least one embodiment of the present disclosure;

[0024] Figure 2 is Figure 1Schematic cross-sectional view of the display panel along the A-A direction;

[0025] Figure 3 It is a plan view of the first NFC antenna in the wiring area provided by at least one embodiment of the present disclosure;

[0026] Figure 4 It is a plan view of the second display panel provided by at least one embodiment of the present disclosure;

[0027] Figure 5 It is a plan view of the first NFC antenna provided by at least one embodiment of the present disclosure;

[0028] Figure 6 is Figure 1 or Figure 4 Schematic cross-sectional view of the display panel along the B-B direction;

[0029] Figure 7 It is a plan view of the touch screen provided by at least one embodiment of the present disclosure.

[0030] Description of reference numerals:

[0031] AA, display area; NA, non-display area; 10, array substrate; 1, substrate; 2, pixel driving circuit; 21, active layer; 22, gate; 23, source-drain electrode; 231, source electrode; 232, drain electrode; 3, gate insulating layer; 31, first gate insulating layer; 32, second gate insulating layer; 4, interlayer insulating layer; 5, storage capacitor; 51, first electrode plate; 52, second electrode plate;

[0032] 20, first NFC antenna; 201, first metal trace; 202, second metal trace; 203, first region; 204, second region; 205, jumper area; 206, wiring area; 207, first lead end; 208, second lead end; 209, insulating layer;

[0033] 30, control circuit; 40, FPC board; 401, first wire; 402, second wire; 50, second NFC antenna;

[0034] 61, first touch electrode; 62, second touch electrode; X, first direction; Y, second direction. Detailed implementation manners

[0035] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Some current display panels with NFC antennas place independent NFC antennas on the main board of the electronic device, which occupies a large space and is not conducive to lightweight design.

[0039] In view of this, a display panel is provided in an embodiment of the present disclosure, in which a coil is integrated on the display panel to realize an integrated design of an NFC near-field communication antenna and a display panel, which is beneficial to saving space and realizing a lightweight design of a display module, while also being able to increase the number of coil turns of the antenna to increase the communication distance.

[0040] The display panel according to the embodiment of the present disclosure is described below with reference to the accompanying drawings and specific embodiments.

[0041] Figure 1 It is a plan view of a first display panel provided by at least one embodiment of the present disclosure. Figure 6 yes Figure 1 The cross-sectional schematic diagram of the panel along the BB direction is shown in FIG.

[0042] like Figure 1 and Figure 6 As shown, an embodiment of the present disclosure provides a display panel. The display panel includes an array substrate 10, and the array substrate 10 includes a substrate 1 and a pixel driving circuit including a TFT transistor 2, and the TFT transistor 2 is located on one side of the substrate 1. A light-emitting element located in a display area AA is provided on the side of the array substrate 10 away from the substrate 1, and the TFT transistor 2 is configured to drive the light-emitting element to emit light. Each TFT transistor 2 and the corresponding light-emitting element constitute a sub-pixel, and a plurality of sub-pixels are combined into a pixel array.

[0043] like Figure 1As shown in the figure, the display panel provided by the embodiments of the present disclosure further includes a first NFC antenna 20 and a control circuit 30. The first NFC antenna 20 is formed on the first surface of the substrate 1, that is, the surface of the substrate 1 close to the TFT transistor 2. The first NFC antenna 20 is electrically connected to the control circuit 30 to form a closed loop, and an induced current loop can be formed between the first NFC antenna 20 and the control circuit 30 to complete near-field communication.

[0044] Figure 2 is Figure 1 a schematic cross-sectional view of the display panel along the A-A direction. Figure 3 is a plan view of the first NFC antenna in the wiring area provided by at least one embodiment of the present disclosure.

[0045] As Figures 1 to 3 shown, the first NFC antenna 20 includes a multi-turn coil. The multi-turn coil includes a first metal trace 201 extending along the first direction X and a second metal trace 202 extending along the second direction Y. Among them, the first metal trace 201 and the second metal trace 202 are disposed on different layers located on the first surface, and are electrically connected through vias between different layers, and the positive projections of the first direction X and the second direction Y on the substrate 1 intersect. After the first metal trace 201 and the second metal trace 202 are electrically connected through vias, a continuous first NFC antenna 20 is formed, so that the first NFC antenna 20 is integrated into the structure of the display panel, thereby reducing the space occupied by the first NFC antenna 20, and making the structural design of the display panel more lightweight and thinner.

[0046] For example, an insulating layer 209 is disposed between the first metal trace 201 and the second metal trace 202, and the via penetrates the insulating layer 209.

[0047] In one example, the thicknesses of the first metal trace 201 and the second metal trace 202 are from 2000 Å to 20000 Å, the line width of the first metal trace 201 is 2 μm, and the line width of the second metal trace 202 is 3 μm. The line widths of the first metal trace 201 and the second metal trace 202 are both small, and the influence on optical display is very small, and it will not affect the normal display of the display panel. For example, in the case where higher thickness requirements are imposed on the first metal trace 201 and / or the second metal trace 202, after forming a whole layer structure by sputtering or evaporation, electroplating is used to increase the thickness, and then a patterning process is used to form the first metal trace 201 and the second metal trace 202.

[0048] For example, the multi-turn coils are connected in parallel to reduce the internal resistance of the first NFC antenna 20 and increase the maximum current that the first NFC antenna 20 can pass through. The larger the maximum current passing through the first NFC antenna 20, the greater the magnetic field strength generated by the first NFC antenna 20, and the longer the maximum communication distance of the first NFC antenna 20.

[0049] As Figure 3 shown, the area where the first metal trace 201 and the second metal trace 202 are electrically connected through vias is called the wiring area, and the black dot-like area indicates the area where the vias are located. In some examples, within the wiring area, one second metal trace 202 is electrically connected to the first metal trace 201 of the multi-turn coil, and one first metal trace 201 is electrically connected to the second metal trace 202 of the multi-turn coil, thereby paralleling the multi-turn coils.

[0050] In the first example, as Figure 1 shown, the orthographic projection of the multi-turn coil in the first NFC antenna 20 on the substrate 1 forms an annular structure (those skilled in the art can understand that the so-called annular structure here is not a completely closed ring, and the first NFC antenna 20 needs to be electrically connected to the control circuit 30 through FPC traces), so that when current flows through the multi-turn coil, a magnetic field in the same direction is generated in the area surrounded by the annular structure.

[0051] In the first example, the magnetic field generated within the annular structure is in the same direction, and sometimes the magnetic field strength cannot meet the actual requirements, and the communication distance still needs to be improved. For this reason, the present invention provides a more preferred second example.

[0052] Figure 4 is a plan view of a second display panel provided by at least one embodiment of the present disclosure. Figure 5 is a plan view of a first NFC antenna 20 provided by at least one embodiment of the present disclosure.

[0053] In the second example, as Figure 4 and Figure 5As shown, the orthographic projection of the multi-turn coil in the first NFC antenna on the substrate 1 is no longer an annular structure, but is formed to include at least a connected first region 203 and a second region 204. When the current flowing out of the control circuit 30 passes through the coil, magnetic fields in different directions are generated in the first region 203 and the second region 204 (right-hand screw rule). Two adjacent magnetic fields are superimposed on each other to form a magnetic field loop, so as to increase the magnetic field intensity generated by the multi-turn coil and expand the magnetic field range, thereby increasing the communication distance of the first NFC antenna 20. Compared with the case where the orthographic projection of the multi-turn coil on the substrate 1 only includes an annular region (i.e., Embodiment 1), the orthographic projection of the multi-turn coil on the substrate 1 includes at least a connected first region 203 and a second region 204, which can form a closed magnetic field with a higher magnetic field intensity in the same layout space, thereby improving the communication distance of the first NFC antenna 20. Of course, on the premise of not deviating from the principle of the present disclosure, the orthographic projection of the multi-turn coil on the substrate 1 may further include three or more regions connected in sequence. When the current passes through the coil, the magnetic field directions generated in two adjacent regions are opposite, ensuring that the magnetic fields generated in two adjacent regions can be superimposed on each other to form a magnetic field loop, thereby increasing the communication distance of the first NFC antenna 20.

[0054] For example, the current flows into the first NFC antenna 20 from the left side and flows out of the first NFC antenna 20 from the right side. At this time, the flowing direction of the current in the first region 203 is clockwise, forming a first magnetic field perpendicular to the paper surface and pointing inwards; the flowing direction of the current in the second region 204 is counterclockwise, forming a second magnetic field perpendicular to the paper surface and pointing outwards. The first magnetic field formed by the first region 203 and the second magnetic field formed by the second region 204 are superimposed to form a closed annular magnetic field, so that the magnetic field intensities of the first magnetic field and the second magnetic field can both be enhanced, thereby increasing the communication distance of the first NFC antenna 20.

[0055] Among them, the first region 203 and the second region 204 jointly constitute a jumper area 205 at the connection of the first region 203 and the second region 204. In the jumper area 205, the first metal trace 201 and the second metal trace 202 are insulated from each other (i.e., not electrically connected through vias as shown in Figure 2 ). Around the jumper area 205, the area where the first metal trace 201 and the second metal trace 202 cross in the first region 203 and the second region 204 constitutes a wiring area 206. In the wiring area 206, the first metal trace 201 and the second metal trace 202 are electrically connected through vias (where the black dot-shaped area indicates the area where the vias are located), so that the first metal trace 201 and the second metal trace 202 form a conductive path.

[0056] In one embodiment, the distance between the first metal trace 201 located in the jumper region 205 and the adjacent first metal trace 201 located in the wiring region 206 (i.e., the distance between the two first metal traces 201 with the shortest distance in the jumper region 205 and the wiring region 206) is greater than the distance between two adjacent first metal traces 201 in the jumper region 205 and / or the wiring region 206. Preferably, the spacing between two adjacent first metal traces 201 in the jumper region 205 is the same as the spacing between two adjacent first metal traces 201 in the wiring region 206, and the spacing between the first metal trace 201 in the jumper region 205 close to the wiring region 206 and the first metal trace 201 in the wiring region 206 close to the jumper region 205 (i.e., the distance between the two first metal traces 201 with the shortest distance in the jumper region 205 and the wiring region 206) is greater than or equal to twice the spacing between two adjacent first metal traces 201 in the wiring region 206. By restricting the spacing between the two first metal traces 201 with the shortest distance in the jumper region 205 and the wiring region 206, the current coupling effect between the first metal traces 201 in the jumper region 205 and the wiring region 206 can be reduced. That is, in the jumper region 205 and the wiring region 206, when the current flowing through the first metal trace 201 in one of them changes, the influence on the current of the first metal trace 201 in the other is within a controllable range and will not affect near-field communication accordingly.

[0057] Similarly, the distance between the second metal trace 202 located in the jumper region 205 and the adjacent second metal trace 202 located in the wiring region 206 (i.e., the distance between the two second metal traces 202 with the shortest distance in the jumper region 205 and the wiring region 206) is greater than the distance between two adjacent second metal traces 202 in the jumper region 205 and / or the wiring region 206. Preferably, the spacing between two adjacent second metal traces 202 in the jumper region 205 is the same as the spacing between two adjacent second metal traces 202 in the wiring region 206, and the spacing between the second metal trace 202 in the jumper region 205 close to the wiring region 206 and the second metal trace 202 in the wiring region 206 close to the jumper region 205 (i.e., the distance between the two second metal traces 202 with the shortest distance in the jumper region 205 and the wiring region 206) is greater than or equal to twice the spacing between two adjacent second metal traces 202 in the wiring region 206. By restricting the spacing between the two second metal traces 202 with the shortest distance in the jumper region 205 and the wiring region 206, the current coupling effect between the second metal traces 202 in the jumper region 205 and the wiring region 206 can be reduced.

[0058] For example, as Figure 1 and Figure 4As shown, a first lead end 207 and a second lead end 208 are provided at the end of the first NFC antenna 20, and the control circuit 30 is disposed on an externally connected FPC board 40. A first wire 401 and a second wire 402 are provided on the FPC board 40. The first wire 401 is electrically connected to the first lead end 207, and the second wire 402 is electrically connected to the second lead end 208. The first NFC antenna 20 is electrically connected to the control circuit 30 through the first wire 401 and the second wire 402. After the first wire 401 is electrically connected to the first lead end 207 and the second wire 402 is electrically connected to the second lead end 208, they are bonded with ACF glue and ultraviolet cured with UV glue to ensure the reliability of the connection.

[0059] For example, as Figure 4 shown, the display panel further includes a second NFC antenna 50, and the second NFC antenna 50 is disposed on the second surface of the substrate 1 opposite to the first surface. For example, the second NFC antenna 50 is disposed on an externally connected FPC board 40, and the FPC board 40 provided with the second NFC antenna 50 is folded to the second surface of the substrate 1 (in the figure, the state before folding is shown for the second NFC antenna 50 to be visible). For example, the second NFC antenna 50 is connected in parallel with the first NFC antenna 20 and is electrically connected to the control circuit 30 to form a current loop. Near-field communication is mainly performed by the second NFC antenna 50 on the non-display side of the display panel, and near-field communication is mainly performed by the first NFC antenna 20 on the display side of the display panel, so that the display panel can obtain good near-field communication performance in both directions.

[0060] It should be noted that Figure 1 and Figure 4 for the display panel shown, the cross-sectional schematic diagrams along the A-A direction and the B-B direction are exactly the same.

[0061] For example, as Figure 6 shown, the thin film transistor includes an active layer 21, a gate 22, an insulating layer 3 (including a first gate insulating layer 31 and a second gate insulating layer 32), an interlayer insulating layer 4, and source-drain electrodes 23 (including a source electrode 231 and a drain electrode 232) that are sequentially disposed on the substrate 1. Those skilled in the art can understand that the source and drain are only differences in naming, and there is no difference in the process preparation between them. The source electrode 231 can also be called the drain electrode, and the drain electrode 232 can be called the source electrode, which is not limited herein. The pixel driving circuit further includes structures such as a storage capacitor 5. The storage capacitor 5 includes a first electrode plate 51 and a second electrode plate 52. For example, the first electrode plate 51 can be disposed on the same layer as the gate 22, and the second electrode plate 52 is between the gate insulating layer 3 and the interlayer insulating layer 4.

[0062] In the disclosed embodiments of the present invention, the co - layer setting of two or more functional layers means that these co - layer - set functional layers can be formed using the same material layer and the same preparation process (such as a patterning process, etc.), thereby simplifying the preparation process of the display panel.

[0063] For example, as Figure 2 and Figure 6 shown, the first metal trace 201 is co - layer set with the source - drain electrodes 23 of the array substrate 10, and the second metal trace 202 is co - layer set with the gate 22. In this way, the first NFC antenna 20 is integrated into the known structure of the array substrate 10. Without increasing the process steps, the thickness of the array substrate 10 is not increased, and the space for arranging the first NFC antenna 20 is relatively large, enabling an increase in the number of turns of the first NFC antenna 20 to improve the communication distance of the first NFC antenna 20. For example, the first direction X is consistent with the extension direction of the source - drain electrodes 23, and the second direction Y is consistent with the extension direction of the gate 22, that is, the first metal trace 201 is consistent with the extension direction of the source - drain electrodes 23, and the second metal trace 202 is consistent with the extension direction of the gate 22, so as to avoid interference between the first metal trace 201 and the source - drain electrodes 23 and interference between the second metal trace 202 and the gate 22.

[0064] For example, for a pixel unit including red, green, and blue colors, corresponding to three source electrodes 231 respectively, in the area where the first metal trace 201 is set, only one first metal trace 201 is arranged in parallel beside each source electrode 231. Of course, on the premise of not deviating from the principle of the present disclosure, one first metal trace 201 can be arranged in parallel beside any one of the three source electrodes 231.

[0065] The NFC antenna of the present invention can be applied to a touch screen. Figure 7 is a plan view of a touch screen provided by at least one embodiment of the present disclosure.

[0066] For example, as Figure 7As shown, the display panel further includes a touch screen, which is located on the side of the array substrate 10 facing away from the substrate 1. The touch screen includes a first touch electrode 61 and a second touch electrode 62 arranged in sequence along the direction away from the substrate 1. The first metal trace 201 is arranged on the same layer as the first touch electrode 61, and the second metal trace 202 is arranged on the same layer as the second touch electrode 62. In this way, the first NFC antenna 20 is integrated into the known structure of the touch screen, which will not increase the thickness of the display panel, and the space for arranging the first NFC antenna 20 is relatively large, enabling an increase in the number of turns of the first NFC antenna 20 to improve the communication distance of the first NFC antenna 20. For example, the first direction X is consistent with the extension direction of the first touch electrode 61, and the second direction Y is consistent with the extension direction of the second touch electrode 62, that is, the first metal trace 201 is consistent with the extension direction of the first touch electrode 61, and the second metal trace 202 is consistent with the extension direction of the second touch electrode 62, so as to avoid interference between the first metal trace 201 and the first touch electrode 61 and interference between the second metal trace 202 and the second touch electrode 62.

[0067] An embodiment of the present disclosure further provides a display device, including the display panel of any of the above. The display device provided by the embodiment of the present disclosure may be a wearable device, such as a watch. Of course, it may also be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0068] Another embodiment of the present invention further provides a method for manufacturing a display panel, including: forming a first NFC antenna composed of multiple turns of coils on a first surface of a substrate, where the multiple turns of coils include a first metal trace extending along a first direction and a second metal trace extending along a second direction, where the first metal trace and the second metal trace are arranged on different layers on the first surface and are electrically connected through vias between the different layers, and the first direction and the second direction intersect in the orthographic projection on the substrate 。

[0069] Next, taking the formation of Figures 1 to 4 and Figure 6 the shown display panel as an example, the method for manufacturing the display panel provided by the embodiment of the present disclosure will be further introduced.

[0070] First, provide the substrate 1. For example, when the display panel is a flexible display panel, the provided substrate 1 may be a flexible substrate such as polyimide (PI), and when the display panel is a rigid panel, the substrate 1 may be a rigid substrate such as glass or quartz.

[0071] For example, an active layer 21 is formed on a substrate 1 by using a patterning process; a first gate insulating layer 31 is formed on the active layer 21 by means of deposition or the like; a gate electrode 22, a first electrode plate 51, and a second metal trace 202 are simultaneously formed on the first gate insulating layer 31 by using a patterning process. At this time, the second metal trace 202, the gate electrode 22, and the first electrode plate 51 are formed in the same layer, thereby simplifying the manufacturing process of the display panel. Then, an interlayer dielectric layer 32 is simultaneously formed on the gate electrode 22, the first electrode plate 51, and the second metal trace 202 by means of deposition or the like; a second electrode plate 52 is formed by using a patterning process; a planarization layer 4 is simultaneously formed on the second electrode plate 52 by means of deposition or the like; then, the insulating layer 3 and the planarization layer 4 are etched to form vias exposing the active layer 21 and vias exposing the second metal trace 202. For example, a single patterning process includes processes such as photoresist formation, exposure, development, and etching.

[0072] For example, the materials of the gate electrode 22, the first electrode plate 51, and the second metal trace 202 include metals or alloy materials such as aluminum, titanium, and cobalt. During preparation, first, a layer of gate electrode 22 material layer, the first electrode plate 51, and the second metal trace 202 are formed by means of sputtering or evaporation, etc., then the material layer is thickened by means of electroplating, and then a patterning process is performed on the gate electrode 22 material layer to form the patterned gate electrode 22, the first electrode plate 51, and the second metal trace 202. The formation methods of other structures formed in the same layer are similar to this, so they will not be elaborated here.

[0073] For example, the active layer 21 can adopt materials such as polysilicon and metal oxides, the insulating layer 3 can adopt inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride, the second electrode plate 52 can adopt metals or alloy materials such as aluminum, titanium, and cobalt, and the planarization layer 4 can adopt inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride. The embodiments of the present disclosure do not limit the materials of each functional layer, and the materials of each functional layer are not limited to the above examples.

[0074] After the vias in the planarization layer 4 are formed, source-drain electrodes 23 and a first metal trace 201 are formed. The first metal trace 201 and the source-drain electrodes 23 are arranged in the same layer, thereby simplifying the manufacturing process of the display panel.

[0075] For example, the source-drain electrodes 23 and the first metal trace 201 can be formed as a multi-layer metal structure, such as a three-layer metal layer structure. For example, in one example, a titanium material layer, an aluminum material layer, and a titanium material layer can be sequentially formed by means of sputtering or evaporation, etc., and then the three material layers are patterned by using the same patterning process to form a titanium / aluminum / titanium three-layer metal structure.

[0076] The display panel provided by the embodiments of the present disclosure or the display panel obtained by using the preparation method provided by the embodiments of the present disclosure can be used in a display device, and the display device can be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. The embodiments of the present disclosure do not make any limitations thereto.

[0077] There are also the following points that need to be explained:

[0078] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0079] (2) For clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of the layer or region is enlarged or reduced, that is, these drawings are not drawn according to the actual scale. It can be understood that when an element such as a layer, a film, a region or a substrate is referred to as being "on" or "under" another element, the element can be "directly" on or under the other element or there can be an intermediate element.

[0080] (3) Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0081] As described above, the above are only the specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A display panel, characterized in that, Comprising: A substrate; A first NFC antenna disposed on a first surface of the substrate, including a multi-turn coil, wherein the multi-turn coil includes a first metal trace extending in a first direction and a second metal trace extending in a second direction, wherein the first metal trace and the second metal trace are disposed on different layers on the first surface, electrically connected through vias between the different layers, and the first direction and the second direction intersect in the orthographic projection on the substrate.

2. The display panel according to claim 1, wherein: The first metal trace is disposed on the same layer as the source-drain electrodes of the display panel; The second metal trace is disposed on the same layer as the gate of the display panel.

3. The display panel according to claim 2, wherein: The first direction is consistent with the extending direction of the source-drain electrodes; The second direction is consistent with the extending direction of the gate.

4. The display panel according to claim 1, wherein: The display panel includes a first touch electrode and a second touch electrode; The first metal trace is disposed on the same layer as the first touch electrode; The second metal trace is disposed on the same layer as the second touch electrode.

5. The display panel according to claim 2, wherein: The first direction is consistent with the extending direction of the first touch electrode; The second direction is consistent with the extending direction of the second touch electrode.

6. The display panel according to any one of claims 1-5, wherein: The orthographic projection of the multi-turn coil on the substrate forms an annular structure, such that when current flows through the multi-turn coil, a magnetic field in the same direction is generated in the region surrounded by the annular structure.

7. The display panel according to any one of claims 1-5, wherein: The orthographic projection of the multi-turn coil on the substrate at least includes a connected first region and a second region, such that when current flows through the multi-turn coil, magnetic fields in different directions are generated in the first region and the second region.

8. The display panel according to claim 7, wherein: The first region and the second region form a jumper area at the connection; surrounding the jumper area, the region where the first metal trace and the second metal trace cross in the first region and the second region forms a wiring area; Wherein, in the jumper area, the first metal trace and the second metal trace are electrically insulated from each other; In the wiring area, the first metal trace and the second metal trace are electrically connected through the via.

9. The display panel according to claim 8, wherein: The distance between the first metal trace located in the jumper area and the adjacent first metal trace located in the wiring area is greater than the distance between adjacent first metal traces in the jumper area and / or the wiring area; The distance between the second metal trace located in the jumper area and the adjacent second metal trace located in the wiring area is greater than the distance between adjacent second metal traces in the jumper area and / or the wiring area.

10. The display panel according to claim 1, wherein, Further comprising: A second NFC antenna is disposed on a second surface of the substrate opposite to the first surface.

11. A display device, characterized in that, A display panel according to any one of claims 1 to 10.

12. A method for manufacturing a display panel, characterized in that, Comprising: A first NFC antenna formed by a multi-turn coil on a first surface of a substrate, wherein the multi-turn coil includes a first metal trace extending in a first direction and a second metal trace extending in a second direction, wherein the first metal trace and the second metal trace are disposed on different layers on the first surface, electrically connected through vias between the different layers, and the first direction and the second direction intersect in a positive projection on the substrate.

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