Display panel and display apparatus

Abstract

The present disclosure relates to the technical field of display, and provides a display panel and a display apparatus. The display panel comprises: a display region and a non-display region disposed outside the display region, wherein the non-display region comprises a step region and a non-step region, the step region comprises a wire region and a functional region which are arranged along a first direction, and the functional region is provided with a bonding pin; a touch electrode and a touch signal line electrically connected to the touch electrode, wherein the touch signal line extends from the wire region to the functional region and is electrically connected to the bonding pin, and the part of the touch signal line located in the functional region is a touch wire; and a first signal line located in the functional region and configured to transmit an alternating current signal, wherein along a second direction, the first signal line at least partially overlaps the touch wire, an overlapping region of the first signal line and the touch wire is isolated by a first shielding portion, the first shielding portion is configured to receive a fixed potential signal, and the second direction is perpendicular to a light exit surface of the display panel. In this way, the interference of other signals in the panel on a touch signal can be reduced or avoided.

Description

A display panel and display device

[0001] This invention claims priority to Chinese Patent Application No. 202411204925.8, filed with the State Intellectual Property Office of China on August 29, 2024, entitled “A Display Panel and Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0003] With the continuous development of science and technology, more and more display products, such as mobile phones, tablets, laptops and smart wearable devices, are being widely used in people's daily lives and work, bringing great convenience to people's daily lives and work, and becoming an indispensable tool for people today.

[0004] For display products with touch functionality, how to reduce or avoid interference from other signals in the display product on the touch signal and improve touch accuracy has become one of the urgent technical problems to be solved at present.

[0005] Summary of the Invention

[0006] To address the aforementioned technical issues, this disclosure provides a display panel and a display device, which aim to reduce or avoid interference from other signals in the display panel on touch control and improve touch accuracy.

[0007] In a first aspect, this disclosure provides a display panel, including:

[0008] The display area and the non-display area located outside the display area, the non-display area includes a stepped area and a non-stepped area, the stepped area includes a trace area and a functional area arranged along a first direction, and the functional area is provided with bonding pins;

[0009] Touch electrodes and touch signal lines electrically connected to the touch electrodes. The touch signal lines extend from the routing area to the functional area and are electrically connected to the bonding pins. The part of the touch signal lines located in the functional area is the touch routing.

[0010] The first signal line, located in the functional area, is configured to transmit AC signals;

[0011] Along the second direction, the first signal line and the touch trace at least partially overlap, and the overlapping area of ​​the first signal line and the touch trace is isolated by a first shielding part, which is configured to receive a fixed potential signal. The second direction is perpendicular to the light-emitting surface of the display panel.

[0012] Secondly, based on the same inventive concept, this disclosure also provides a display device, including the display panel provided in the first aspect of this disclosure.

[0013] The technical solutions provided in this disclosure have the following advantages compared with the prior art:

[0014] In the display panel and display device provided in this disclosure, the touch signal lines connected to the touch electrodes extend to the functional area and are electrically connected to the bonding pins in the functional area. Besides the touch signal lines, some other signal lines in the display panel (the first signal lines mentioned in this disclosure) are also led to the functional area and electrically connected to other bonding pins in the functional area. The first signal lines include signal lines in the functional area used for transmitting AC signals, such as signal lines for transmitting data signals, signal lines for transmitting clock signals, etc. The signals transmitted by these signal lines are not constant DC signals, but alternating AC signals. In the functional area, due to the large number of wirings, the touch traces and the first signal lines may overlap. Since the signals transmitted on the first signal lines are AC signals, when the signal on the first signal lines changes, due to coupling, the signal on the touch traces will also change, thus affecting the accuracy of the touch signals transmitted on the touch traces and impacting touch precision. Therefore, this disclosure introduces a first shielding portion in the overlapping area of ​​the first signal line and the touch trace. The signal on the first shielding portion is a fixed potential signal. The first shielding portion can shield the signal coupling between the first signal line and the touch trace, thereby reducing or avoiding the influence of signal jumps on the first signal line on the touch signal on the touch trace, and thus improving touch accuracy. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a plan view of a display panel provided in an embodiment of this disclosure;

[0018] Figure 2 shows a schematic diagram of a connection between touch electrodes and touch signal lines in a display panel provided in an embodiment of this disclosure;

[0019] Figure 3 shows an enlarged schematic diagram of region A in Figure 1;

[0020] Figure 4 is a schematic diagram of a pixel arrangement in a display panel provided in an embodiment of this disclosure;

[0021] Figure 5 shows a cross-sectional view of the display panel in Figure 4 along the AA direction.

[0022] Figure 6 shows a top view of the touch signal line, power signal line, and first signal line;

[0023] Figure 7 shows a schematic diagram of a BB-oriented film layer as shown in Figure 6;

[0024] Figure 8 shows a wiring diagram of a data line in a display panel provided in an embodiment of this disclosure;

[0025] Figure 9 shows another enlarged schematic diagram of region A in Figure 1;

[0026] Figure 10 shows another enlarged schematic diagram of region A in Figure 1;

[0027] Figure 11 shows another enlarged schematic diagram of region A in Figure 1;

[0028] Figure 12 shows a relative positional relationship between the touch wiring of the functional area, the first signal line and the first shielding part;

[0029] Figure 13 shows a schematic diagram of the main body, first branch and second branch of the touch wiring in the functional area of ​​Figure 9, Figure 10 or Figure 11.

[0030] Figure 14 shows a top view of a second shielding section disposed between the first branch and the second branch;

[0031] Figure 15 shows another top view of the second shielding part disposed between the first branch and the second branch.

[0032] Figure 16 shows another wiring diagram of the main body, the first branch and the second branch in the touch wiring of the functional area.

[0033] Figure 17 shows another top view of the second shielding part disposed between the first branch and the second branch;

[0034] Figure 18 shows a schematic diagram of a film layer of a functional area of ​​a display panel provided in this disclosure;

[0035] Figure 19 shows another schematic diagram of the film layer of the functional area of ​​the display panel provided in this disclosure;

[0036] Figure 20 shows a wiring diagram of the first branch line at the junction of the cross-line area and the first area;

[0037] Figure 21 shows a comparative schematic diagram corresponding to Figure 20;

[0038] Figure 22 shows a top view of the ramp structure and the first branch line;

[0039] Figure 23 shows a CC-direction cross-sectional view corresponding to the structure in Figure 22;

[0040] Figure 24 shows another top view of the ramp structure and the first branch line;

[0041] Figure 25 shows a schematic diagram of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0043] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0044] Figure 1 is a plan view of a display panel provided in an embodiment of the present disclosure; Figure 2 is a schematic diagram of a connection between the touch electrode T0 and the touch signal line X in the display panel provided in an embodiment of the present disclosure; Figure 3 is an enlarged schematic diagram of region A in Figure 1. Referring to Figures 1 to 3, the present disclosure provides a display panel 100, including:

[0045] The display area AA and the non-display area A0 located outside the display area AA. The non-display area A0 includes a stepped area A1 and a non-stepped area A2. The stepped area A1 includes a trace area Q1 and a functional area Q2 arranged along a first direction D1. The functional area Q2 is provided with a bonding pin B0. The first direction D1 is the direction from the display area AA to the stepped area A1. Optionally, the stepped area A1 is located on one side of the display area AA along the first direction D1. The non-stepped area A2 can be regarded as other border areas in the display panel other than the stepped area A1, such as the left border, the right border, and the top border.

[0046] The display panel 100 also includes a touch electrode T0 and a touch signal line X electrically connected to the touch electrode T0. The touch signal line X extends from the trace area Q1 to the functional area Q2 and is electrically connected to the bonding pin B0. The portion of the touch signal line X located in the functional area Q2 is the touch trace X0. Optionally, the touch electrode T0 is a mutual capacitance touch electrode as shown in FIG2, including a touch sensing electrode RX and a touch driving electrode TX. The touch signal line X includes a touch signal line X1 connected to the touch driving electrode TX and a touch signal line X2 connected to the touch sensing electrode RX. This embodiment takes the scheme of the touch signal line X1 extending from the bottom of the display area to the step area and the touch signal line X2 extending from the non-step area to the bottom of the display area and then extending to the step area as an example for illustration, but it is not limited to this. In some other embodiments of this disclosure, the touch signal lines X1 and X2 can also extend directly from the bottom of the display area to the step area. In some other embodiments of this disclosure, the touch electrode may also be a self-capacitive touch electrode, and the touch signal line is a signal line connected to the self-capacitive touch electrode.

[0047] The display panel also includes a first signal line S1, which is located in the functional area Q2 and is configured to transmit AC signals. The first signal line S1 is, for example, a signal line that provides the circuits in the display panel with the signals required for display to realize the display function, such as at least one of data lines, clock signal lines, gate drive signal lines, light emission control signal lines, etc.

[0048] Along the second direction, the first signal line S1 and the touch trace X0 overlap at least partially. The overlap area of ​​the first signal line S1 and the touch trace X0 is isolated by the first shielding part 91, which is configured to receive a fixed potential signal. The second direction is perpendicular to the light-emitting surface of the display panel.

[0049] It should be noted that Figures 1 and 2 are only illustrated using a rectangular display panel as an example, and do not limit the actual shape of the display panel. In some other embodiments of this disclosure, the display panel can also be any other feasible structure, such as a rounded rectangle, a circle, etc. Optionally, the stepped area A1 in this disclosure also includes a bending area Q0, which is located between the wiring area Q1 and the functional area Q2. The functional area Q2 is bent to the side of the display panel away from the light-emitting surface through the bending area Q0. By bending the functional area Q2 to the non-light-emitting surface of the display panel through the bending area Q0, the bottom bezel width of the display panel can be reduced, achieving a narrow bezel effect. It should be noted that the embodiments in Figures 1 and 3 only show the scheme where the display panel has not yet been bent.

[0050] Optionally, the display panel provided in this embodiment can be a display panel using organic light-emitting diode (OLED) display technology. For example, please refer to Figures 4 and 5. Figure 4 shows a schematic diagram of a pixel arrangement in the display panel provided in this embodiment, and Figure 5 shows a cross-sectional view along axis AA of the display panel in Figure 4. It should be noted that the pixel arrangement structure shown in Figure 4 is only schematic and does not limit the actual pixel arrangement or number of pixels in the display panel. Referring to Figure 5, the basic structure of the light-emitting element 30 of the OLED display panel includes an anode 301, a light-emitting material layer 302, and a cathode 303. When a suitable voltage is supplied, holes in the anode 301 and electrons in the cathode 303 combine in the light-emitting material layer 302 to generate light. Compared with thin-film transistor liquid crystal displays, OLED display panels have high visibility and high brightness, and are more energy-efficient, lightweight, and thin. Of course, in some other embodiments of the present invention, the display panel may also be a display panel using inorganic light-emitting diode display technology, such as a Micro LED display panel, or a Mini LED display panel, etc., and this disclosure is not limited thereto.

[0051] Taking the display panel in Figures 4 and 5 as an example, the display layer 10 includes a pixel definition layer 19, which defines a plurality of pixel openings; a light-emitting material layer 302 is located at least in the pixel openings, along the second direction D2, an anode 301 and a cathode 303 are located on opposite sides of the light-emitting material layer 302, and the anode 301 is located on the side of the cathode 303 facing the substrate 00. Optionally, an encapsulation layer 50 is also provided on the side of the cathode 303 away from the anode 301, and a touch electrode T0 is located on the side of the encapsulation layer 50 away from the cathode 303. Optionally, the encapsulation layer 50 includes a first inorganic layer 51, an organic layer 52 and a second organic layer 53 stacked together. The display panel also includes a driving layer 40 disposed between the substrate 00 and the display layer 10, and a driving circuit is disposed in the driving layer 40 for providing a driving voltage to the display layer 10 to drive the display layer 10 to emit light, and the driving circuit includes a plurality of transistors M0.

[0052] Please continue referring to Figures 2 and 3. The touch signal line X, connected to the touch electrode T0, extends to functional area Q2 and is electrically connected to the bonding pin B0 in functional area Q2. Optionally, the bonding pin B0 is used to bond a driver chip, which may be, for example, a chip integrating a touch driver chip and a display driver chip. In addition to the touch signal line X, some other signal lines in the display panel (the first signal line S1 mentioned in this embodiment) are also led to functional area Q2 and electrically connected to other bonding pins B0 in functional area Q2. The first signal line S1 includes signal lines in functional area Q2 used for transmitting AC signals, such as signal lines for transmitting data signals, signal lines for transmitting clock signals, etc. The signals transmitted by these signal lines are not constant DC signals, but alternating AC signals. In functional area Q2, due to the large number of wiring lines, the touch trace X0 overlaps with the first signal line S1. Since the signal transmitted on the first signal line S1 is an AC signal, when the signal on the first signal line S1 changes direction, the coupling effect causes a corresponding change in the signal on the touch trace X0, thus affecting the accuracy of the touch signal transmitted on the touch trace X0 and impacting touch precision. Therefore, this disclosure introduces a first shielding portion 91 in the overlapping area of ​​the first signal line S1 and the touch trace X0. The signal on this first shielding portion 91 is a fixed potential signal. This first shielding portion 91 can shield the signal coupling between the first signal line S1 and the touch trace X0, thereby reducing or avoiding the impact of signal changes on the first signal line S1 on the touch signal on the touch trace X0, and thus improving touch precision.

[0053] It should be noted that, for touch signal lines X, only touch signal lines X1 and X2 are shown in Figure 3 with different fills. In fact, touch signal lines X1 and X2 shown in Figure 3 each include multiple independent touch signal lines as shown in Figure 2. The illustration in Figure 3 is only to more clearly show the arrangement of touch signal lines in the display panel.

[0054] Please continue to refer to Figure 3. In one optional embodiment of this disclosure, the display panel further includes a power signal line PX, which is configured to provide a DC power signal to the display area AA. In the functional area Q2, the power signal line PX is multiplexed as the first shield 91.

[0055] Taking an OLED display panel as an example, when the light-emitting element is driven to emit light by the pixel driving circuit, both the pixel driving circuit and the light-emitting element are electrically connected to the power signal line PX. The power signal line PX includes a positive power signal line PVDD and a negative power signal line PVEE. Optionally, the negative terminal of the light-emitting element is connected to the negative power signal line PVEE, and the positive terminal is connected to the pixel driving circuit. The pixel driving circuit is connected to the positive power signal line PVDD. The signal transmitted on the power signal line PX is a constant DC power signal. For the specific structure of the pixel driving circuit, refer to the structure of relevant prior art; this disclosure does not limit it. In the display panel, the power signal line PX extends from the display area AA to the functional area Q2. After obtaining the power signal through the functional area Q2, it is transmitted to the display area AA. For example, the power signal line PX can be electrically connected to the flexible circuit board FPC in the functional area Q2, and obtain the power signal through the flexible circuit board FPC. In functional area Q2, this disclosure reuses the power signal line PX as the first shielding part 91 to shield the signal coupling between the first signal line S1 and the touch trace X0. Thus, there is no need to introduce a new film layer structure in functional area Q2 to make the first shielding part 91, which helps to simplify the manufacturing process of the display panel and improve the production efficiency of the display panel.

[0056] Figure 6 shows a top view of the touch signal line X, the power signal line PX, and the first signal line S1. Figure 7 shows a schematic diagram of the BB-direction film layer of Figure 6. Referring to Figures 6 and 7, in an optional embodiment of this disclosure, the display panel further includes a substrate 00. The power signal line PX and the first signal line S1 are located on the same side of the substrate. The display panel further includes an organic insulating layer JY, which is adjacent to the power signal line PX and located on the side of the power signal line PX facing the substrate 00. The power signal line PX is provided with a plurality of through holes K. Along the second direction D2, the through holes K penetrate the power signal line PX, and the through holes K do not overlap with the first signal line S1.

[0057] The organic insulating layer JY in the display panel can be, for example, a planarization layer, with the power signal line PX located on the side of the organic insulating layer JY facing away from the substrate 00. To reduce the voltage drop of the power supply signal, when forming the power signal line PX in the functional area Q2 of the display panel, if space permits, the power signal line PX is usually set to have a larger linewidth, for example, a planar structure. The organic insulating layer JY is made of organic materials. After high-temperature processing, organic materials will volatilize some water vapor and other substances. If a large area of ​​metal covers the organic insulating layer, the volatile substances of the organic insulating layer usually cannot penetrate the dense metal layer, for example, they cannot penetrate the power signal line PX, thus causing bulging on the surface of the power signal line PX in some areas, resulting in defects. Therefore, this disclosure provides multiple through holes K on the power signal line PX. When the organic insulating layer produces volatile substances, the volatile substances can volatilize through the through holes K, thereby avoiding the problem of bulging of the power signal line PX due to the difficulty in evaporation of volatile substances. Furthermore, this disclosure specifies that the through hole K along the second direction D2 does not overlap with the first signal line S1, which can prevent the signal of the first signal line S1 from passing through the through hole K and coupling to the touch trace, thereby ensuring the signal shielding effect when the power signal line PX is multiplexed as the first shielding part 91.

[0058] Please continue referring to Figure 3. In one optional embodiment of this disclosure, in functional area Q2, the touch trace X0 includes a main body ZT and a first branch FZ1. The main body ZT is electrically connected to the touch signal line X, and the two ends of the first branch FZ1 are electrically connected to the main body ZT and the bonding pin B0, respectively. It should be noted that when the signal lines connected to the touch electrode include touch signal lines X1 and X2, the touch trace X0 corresponding to touch signal lines X1 and X2 can both include the main body ZT and the first branch FZ1.

[0059] Figure 3 illustrates the first fan-out lines SC1 and SC2 using only the same filling structure. However, in reality, both the first fan-out lines SC1 and SC2 include multiple independent signal lines. For example, refer to Figure 8, which shows a wiring diagram of the data line DL in a display panel provided by an embodiment of this disclosure. The display area AA includes the data line DL, the wiring area Q1 includes the first fan-out line SC1 electrically connected to the data line DL, and the functional area Q2 includes the second fan-out line SC2 electrically connected to the first fan-out line SC1. Along the second direction, the first branch FZ1 does not overlap with the second fan-out line SC2.

[0060] In this disclosure, when the touch trace X0 is laid out in the functional area Q2, the main body ZT of the touch trace X0 is located on the side of the first branch FZ1 facing the display area AA. In the embodiment shown in Figure 3, the main body ZT extends along the first direction D1, and the portion of the first branch FZ1 connected to the main body ZT extends along the third direction D3 and further extends to the location of the bonding pin B0. It should be noted that both the main body ZT and the first branch FZ1 include multiple touch signal lines X.

[0061] Referring to Figures 3 and 8, the data line DL in display area AA provides data signals to the pixel driving circuit corresponding to the light-emitting element. After being led out from display area AA, the data line DL extends to the bonding pin B0 of functional area Q2 through the first fan-out line SC1 and the second fan-out line SC2, respectively. That is to say, the signals transmitted on the first fan-out line SC1 and the second fan-out line SC2 are also data signals. In functional area Q2, one arrangement of touch trace X0 and the second fan-out line SC2 is that the first branch FZ1 of touch trace X0 is wound around the outside of the second fan-out line SC2. This avoids the first branch FZ1 and the second fan-out line SC2 from overlapping, thereby helping to prevent the data signal transmitted on the second fan-out line SC2 from affecting the touch signal transmitted on the first branch FZ1, thus improving the accuracy of touch signal transmission.

[0062] Please continue referring to Figure 3. In one optional embodiment of this disclosure, the main body ZT and the second fan-out line SC2 do not overlap along the second direction D2. In this embodiment, neither the main body ZT nor the first branch FZ1 corresponding to the touch trace X0 overlaps with the second fan-out line SC2. Therefore, it is beneficial to avoid the coupling effect of the data signal transmitted on the second fan-out line SC2 on the touch signal transmitted on the main body ZT and the first branch FZ1, which is more conducive to improving the transmission accuracy of the touch signal.

[0063] Referring again to Figure 3, in an optional embodiment of this disclosure, in functional area Q2, the main body ZT and the first branch FZ1 are both located on both sides of the second fan-out line SC2 along the third direction D3. The third direction D3 intersects the first direction D1 and is perpendicular to the second direction. This is equivalent to winding the main body ZT and the first branch FZ1 of the touch trace X0 around both sides of the second fan-out line SC2, avoiding placing the main body ZT and the first branch FZ1 in the area where the second fan-out line SC2 is located. This prevents the main body ZT and the first branch FZ1 from overlapping with the second fan-out line SC2 and causing signal coupling, thus improving the accuracy of touch signal transmission. Optionally, referring to Figure 3, the touch signal line X also includes a lead-out portion YC that connects the touch signal line X of the display area AA and the main body ZT of functional area Q2. The lead-out portion YC is located in the trace area Q1, and along the direction of touch signal transmission, the lead-out portion YC is located between the main body ZT and the touch electrode T0 of the display area AA. In this embodiment, the connection position between the main body ZT and the lead-out part YC can be set on both sides of the first fan-out line SC1 along the third direction D3, thereby avoiding the overlap between the main body ZT and the first fan-out line SC1.

[0064] Figure 9 shows another enlarged schematic diagram of region A in Figure 1. The difference from Figure 3 is that the connection positions of the main body ZT and the lead-out part YC are different. Referring to Figure 9, in an optional embodiment of this disclosure, along the second direction (perpendicular to the light-emitting surface of the display panel), the main body ZT overlaps with the second fan-out line SC2, and the first signal line S1 includes the second fan-out line SC2; the overlapping area of ​​the main body ZT and the second fan-out line SC2 is isolated by the first shielding part 91.

[0065] Compared to Figure 3, in the embodiment of Figure 9, the connection position of the main body ZT and the lead-out part YC is closer to the center of the lower bezel of the display panel, while in Figure 3, the connection position of the main body ZT and the lead-out part YC is closer to the two side edges of the lower bezel of the display panel. In practical applications, the connection position of the main body ZT and the lead-out part YC can be selected according to the actual situation. As shown in Figure 9, when the connection position of the main body ZT and the lead-out part YC is closer to the center of the lower bezel of the display panel, the main body ZT will overlap with the second fan-out line SC2. At this time, a first shielding part 91 can be introduced into the overlap area of ​​the main body ZT and the second fan-out line SC2 to shield the signals of the main body ZT and the second fan-out line SC2, thereby avoiding the interference problem between the data signal on the second fan-out line SC2 and the touch signal on the main body ZT. When the main body ZT overlaps with the second fan-out line SC2, the first branch FZ1 can be routed around the second fan-out line SC2 by winding, so as to avoid the first branch FZ1 overlapping with the second fan-out line SC2, thereby reducing the overlap area between the touch trace X0 and the second fan-out line SC2 and reducing the signal interference between them.

[0066] It should be noted that when the main body ZT or the first branch FZ1 overlaps with other fan-out lines, the first shielding part 91 can also be used to shield the interference signal between the fan-out line and the main body ZT, which is also beneficial to improving the transmission accuracy of the touch signal.

[0067] Figure 10 shows another enlarged schematic diagram of region A in Figure 1. Compared with Figure 3, the difference is that the touch trace X0 in the embodiment of Figure 10 also includes a second branch FZ2. Referring to Figure 10, in an optional embodiment of this disclosure, the display panel also includes a test pin VT-P located in functional area Q2; the touch trace X0 also includes a second branch FZ2 located in functional area Q2, and the two ends of the second branch FZ2 are electrically connected to the main body ZT and the test pin VT-P, respectively; along the second direction D2, the second branch FZ2 does not overlap with the second fan-out line SC2.

[0068] This embodiment illustrates a scheme for introducing a test pin VT-P in functional area Q2. During the display panel manufacturing process, before assembling the finished product, various functions of the display panel can be tested using the test pin VT-P. In this embodiment, the touch trace X0 of functional area Q2 is divided into two paths: a first branch FZ1 and a second branch FZ2. The first branch FZ1 is electrically connected to the bonding pin B0, and the second branch FZ2 is electrically connected to the test pin VT-P. When the second branch FZ2 of touch trace X0 is connected to the test pin VT-P, the touch performance of the display panel can be tested using the test pin VT-P. Optionally, the test pin VT-P is located on the lower left and lower right edges of functional area Q2. This avoids overlap between the second branch FZ2 and the second fan-out line SC2 when connecting the second branch FZ2 to the test pin VT-P, thereby preventing the data signal transmitted on the second fan-out line SC2 from affecting the touch signal transmitted on the second branch FZ2, thus improving the accuracy of touch signal transmission during the testing phase.

[0069] In this disclosure, the power signal line PX is connected to the flexible circuit board (FPC), and the power signal is obtained through the FPC. Optionally, the test pin VT-P is located on the side of the flexible circuit board away from the bonding pin B0. When the second branch FZ2 is connected to the bonding pin B0, the second branch FZ2 can extend through the area of ​​the flexible circuit board FPC to the location of the test pin VT-P. Optionally, after the test is completed, the test pin VT-P can be removed according to actual needs. Of course, the test pin VT-P can also be retained as needed, and this disclosure does not specifically limit this.

[0070] Please continue to refer to Figure 10. In one optional embodiment of this disclosure, the non-step region A2 includes a gate driving circuit (not shown in the figure, used to provide gate driving signals to the pixel circuit, for example, it may be located on the left and right bezels of the display panel), the step region A1 includes a drive signal fan-out line VSR-X electrically connected to the gate driving circuit, the first signal line S1 includes the aforementioned drive signal fan-out line VSR-X, in the functional region Q2, the drive signal fan-out line VSR-X is located on both sides of the second fan-out line SC2 along the third direction D3, the third direction D3 intersects with the first direction D1 and is perpendicular to the second direction; in the functional region Q2, along the second direction D2, the drive signal fan-out line VSR-X and the second branch FZ2 at least partially overlap, and the overlap area of ​​the drive signal fan-out line VSR-X and the second branch FZ2 is isolated by the first shielding part 91. It should be noted that the present disclosure illustrates the use of different fillers for the positive power signal line PVDD and the negative power signal line PVEE, but this does not represent the specific film layers of the two. Since both the positive power signal line PVDD and the negative power signal line PVEE can be reused as the first shielding part 91, different first shielding parts 91 may appear in the schematic diagram with different fillers.

[0071] Specifically, when a gate driving circuit is provided in the display panel to provide gate driving signals to the pixel driving circuit, the gate driving circuit is located in a non-stepped area, such as in the left and right bezel areas of the display panel. The gate driving circuit is electrically connected to the bonding pin B0 through the gate driving signal fan-out line VSR-X in the stepped area. Since the gate driving circuit is located in the left and right bezel areas of the display panel, to simplify wiring, the gate driving signal fan-out line connected to the gate driving circuit can be placed on the left and right sides of the stepped area near the edge, that is, on both sides of the second fan-out line SC2 along the third direction D3, to avoid the gate driving signal fan-out line overlapping with the second fan-out line SC2, thereby helping to avoid signal crosstalk between the two. When the second branch FZ2 in the touch trace X0 is electrically connected to the test pin VT-P in the lower left or lower right area of ​​the functional area Q2, the second branch FZ2 is also located near the left or right edge of the functional area Q2. In this case, the drive signal fan-out line VSR-X and the second branch FZ2 will overlap. At this time, the drive signal fan-out line VSR-X is equivalent to the first signal line S1 in this disclosure. A first shield 91 can be introduced between the drive signal fan-out line VSR-X and the second branch FZ2 to shield the signals of both, thus helping to avoid signal crosstalk. It should be noted that the first shield 91 here can reuse either the positive power supply signal line PVDD or the negative power supply signal line PVEE; this disclosure does not specifically limit its use.

[0072] The embodiment shown in Figure 10 illustrates a scheme in which the touch trace X0 is divided into two branches from the main body ZT, namely the first branch FZ1 and the second branch FZ2. The second branch FZ2 is used to achieve electrical connection with the test pin VT-P. In other embodiments of this disclosure, other wiring methods can also be used to achieve the connection between the touch trace X0 and the test pin VT-P. For example, please refer to Figure 11, which shows another enlarged schematic diagram of region A in Figure 1. In an optional embodiment of this disclosure, the display panel further includes a test pin VT-P located in the functional area Q2. The test pin VT-P is located on the side of the bonding pin B0 away from the first branch FZ1. The touch trace X0 also includes an extension YS located in the functional area Q2. The two ends of the extension YS are electrically connected to the bonding pin B0 and the test pin VT-P, respectively.

[0073] The difference between the embodiment shown in Figure 11 and Figure 10 lies in the location of the test pin VT-P in functional area Q2 and the connection method between the touch trace X0 and the test pin VT-P. In the embodiment shown in Figure 10, the test pin VT-P is located in the lower left and lower right areas of functional area Q2. In the embodiment shown in Figure 11, the test pin VT-P is located below the bonding pin B0, close to the center line of functional area Q2. The position of the test pin VT-P can be set according to the actual situation during the display panel manufacturing process. Please refer to Figure 11. This embodiment takes the test pin VT-P located directly below the bonding pin B0 as an example. In order to test the touch function, the touch trace X0 needs to be connected to the test pin VT-P. In this embodiment, an extension YS is introduced. The extension YS is led out from the bonding pin B0 connected to the first branch FZ1 and extends directly to the location of the test pin VT-P. It does not need to be led out from the main body ZT. This setting simplifies the wiring complexity of connecting the touch trace X0 and the test pin VT-P, and reduces the wiring length. While realizing touch detection, it also helps to simplify the wiring process of the display panel.

[0074] Optionally, the test pin VT-P is located below the bonding pin B0 and on the side of the flexible circuit board FPC away from the bonding pin B0. The extension YS extends from the bonding pin B0, passes through the area of ​​the flexible circuit board FPC, and is electrically connected to the test pin VT-P. Optionally, after completing the test, the test pin VT-P can be removed according to actual needs. Of course, the test pin VT-P can also be retained as needed; this disclosure does not specifically limit this.

[0075] Figure 12 shows a relative positional relationship between the touch trace X0, the first signal line S1, and the first shielding part 91 in functional area Q2. Referring to Figure 12, in an optional embodiment of this disclosure, functional area Q2 further includes a test pin VT-P. In functional area Q2, the touch trace X0 includes a main body ZT, a first branch FZ1, and a second branch FZ2. The main body ZT is electrically connected to the touch signal line in the trace area. The two ends of the first branch FZ1 are electrically connected to the main body ZT and the bonding pin B0, respectively. The two ends of the second branch FZ2 are electrically connected to the main body ZT and the test pin VT-P, respectively. Along the second direction, the main body ZT, the first branch FZ1, and the second branch FZ2 all overlap with the first shielding part 91.

[0076] It should be noted that Figure 12 only shows a relative positional relationship of the touch trace X0, the first shielding part 91, and the first signal line S1 in the functional area Q2, and does not show other signal lines in the functional area Q2. Furthermore, although the touch trace X0 in this embodiment is illustrated with a uniform fill, it actually includes multiple independent signal lines. Similarly, although the first signal line S1 in this embodiment is illustrated with a uniform fill, it actually includes multiple independent signal lines. The first signal line S1 can be, for example, the fan-out line corresponding to the data line DL, or other signal lines transmitting AC signals. The main body ZT corresponding to the touch trace X0 branches out into two branches: a first branch FZ1 and a second branch FZ2. The first branch FZ1 is electrically connected to the bonding pin B0, and the second branch FZ2 is electrically connected to the test pin VT-P. Optionally, the bonding area where the bonding pin B0 is located on the first branch FZ1 is electrically connected to the driver chip. The test pin VT-P is located below the flexible circuit board FPC. The second branch FZ2 passes through the area of ​​the flexible circuit board and then electrically connects to the test pin VT-P. The power signal line PX is electrically connected to the flexible circuit board, and the power voltage signal is obtained through the flexible circuit board. Optionally, some signal lines in the first signal line S1 also pass through the area of ​​the flexible circuit board and are electrically connected to the test pin VT-P to realize the testing function.

[0077] This embodiment illustrates a scenario where the first branch FZ1 and the second branch FZ2 of the touch trace X0 both overlap with the first signal line S1. In this case, along the second direction D2, the main body ZT, the first branch FZ1, and the second branch FZ2 all overlap with the first shielding portion 91. Specifically, the first shielding portion 91 is provided in both the overlap area of ​​the first branch FZ1 and the first signal line S1 and the overlap area of ​​the second branch FZ2 and the first signal line S1 to shield the first signal line S1 from signal interference to the touch trace X0. It should be noted that the first shielding portion 91 can reuse at least one of the positive power signal line PVDD and the negative power signal line PVEE in the display panel. This embodiment shows a scheme where the first shielding portion 91 overlapping with the main body ZT and the second branch FZ2 includes the negative power signal line PVEE, and the first shielding portion 91 overlapping with the first branch FZ1 includes both the positive power signal line PVDD and the negative power signal line PVEE, but this disclosure is not limited to this. If the areas where the positive power signal line PVDD and the negative power signal line PVEE are located in the actual manufacturing process do not include the aforementioned overlapping area, the positive power signal line PVDD or the negative power signal line PVEE can be extended to the aforementioned overlapping area to achieve the function of signal shielding. In this way, there is no need to introduce another structure in the display panel as the first shielding part 91, which helps to simplify the overall structure and manufacturing process of the display panel.

[0078] Figure 13 shows a wiring diagram of the main body ZT, the first branch FZ1, and the second branch FZ2 in the touch wiring X0 of functional area Q2 in Figures 9, 10, or 11. It can be regarded as a refinement of the main body and branch located in the left area of ​​functional area Q2 in Figures 9, 10, or 11. The refinement of the main body and branch in the right area of ​​functional area Q2 can be regarded as a structure symmetrically arranged with respect to Figure 13. This disclosure will not describe it further. Referring to Figures 10 and 13, in one optional embodiment of this disclosure, functional area Q2 includes a bonding pin B0 and a test pin VT-P; touch trace X0 includes a main line ZTX, a first branch line FZX1, and a second branch line FZX2. The main line ZTX is electrically connected to the touch signal line X in the trace area. The first branch line FZX1 is electrically connected to the main line ZTX and the bonding pin B0, respectively. The second branch line FZX2 is electrically connected to the main line ZTX and the test pin VT-P, respectively. The first branch line FZX1 and the main line ZTX are arranged on the same layer, and the second branch line FZX2 is arranged on a different layer and electrically connected to the main line ZTX through the first line replacement hole K0. The first branch line FZX1 and the second branch line FZX2 extend in different directions. This embodiment is described using the example of the first branch line FZX1 extending in a first direction and the second branch line FZX2 extending in a second direction.

[0079] This embodiment illustrates the refined wiring structure of the touch trace X0. The entire structure composed of multiple main lines ZTX can be considered as the main body ZT in the aforementioned embodiment. The entire structure composed of multiple first branch lines FZX1 can be considered as the signal line arrangement in a portion of the first branch FZ1 in the aforementioned embodiment. The entire structure composed of multiple second branch lines FZX2 can be considered as the signal line arrangement in a portion of the second branch FZ2 in the aforementioned embodiment. Along the first direction D1, the end of the main line ZTX away from the display area AA includes a branch point (the location of the first line switching hole K0). Two branch lines emerge from this branch point, namely the first branch line FZX1 and the second branch line FZX2. The first branch line FZX1 and the second branch line FZX2 extend in different directions. The main line ZTX and the first branch line FZX1 are disposed on the same layer and can be manufactured in the same process. The second branch line FZX2 is located on a different film layer than the main line ZTX. At the branch point, the second branch line FZX2 is electrically connected to the main line ZTX through the first wire exchange hole K0, allowing the first branch line FZX1 and the second branch line FZX2 to extend to their respective pins on different film layers. Specifically, the first branch line FZX1 extends to the area where the bonding pin B0 is located, and the second branch line FZX2 extends to the area where the test pin VT-P is located. This layered wiring method for the first branch line FZX1 and the second branch line FZX2 simplifies the wiring difficulty of the touch trace X0 in the functional area Q2 and improves the production efficiency of the display panel.

[0080] Please continue to refer to Figure 13, and in conjunction with Figure 10, in one optional embodiment of this disclosure, the main line ZTX and the first branch line FZX1 extend along the first direction D1 and are arranged along the third direction D3, the second branch line FZX2 is arranged along the first direction D1 and extends along the third direction D3, and the first direction D1 and the third direction D3 intersect; the functional area Q2 includes a first center line ZX1 extending along the first direction D1, and on the same side of the first center line ZX1, along the third direction D3, in the direction from the first center line ZX1 to the edge of the display panel, the length of the main line ZTX decreases, the length of the first branch line FZX1 increases, and the first line replacement hole is located between the main line ZTX and the first branch line FZX1.

[0081] This embodiment illustrates a scheme where the length of the main line ZTX is set in a gradually changing form. Specifically, taking the main line ZTX in the left area of ​​functional area Q2 as an example, the arrangement of the main line ZTX in the right area of ​​functional area Q2 is symmetrical to that in the left area. Along the first center line of functional area Q2 pointing towards the left edge of functional area Q2, the length of the main line ZTX gradually decreases. That is, the closer to the first center line ZX1 of functional area Q2, the longer the main line ZTX is. The branch point on the main line ZTX (corresponding to the location of the first wire switching hole K0) is closer to the lower edge of functional area Q2, and the length of the corresponding first branch line FZX1 changes in the opposite direction to the length of the main line ZTX. Thus, when the second branch line FZX2 is led out from the branch point of each main line ZTX along the third direction D3, an insulating space can be separated between each second branch line FZX2, so that each second branch line FZX2 can be set on the same film layer, without the need to set different film layers for different second branch lines FZX2. Therefore, it is beneficial to simplify the overall film layer structure of the functional area Q2 in the display panel and reduce the wiring difficulty of the main line and branch line in the touch wiring X0.

[0082] Figure 14 shows a top view of a second shielding portion 92 disposed between the first branch line FZX1 and the second branch line FZX2. Referring to Figure 13 and in conjunction with Figure 14, in an optional embodiment of this disclosure, the first branch line FZX1 and the second branch line FZX2 overlap along the second direction; the display panel also includes a second shielding portion 92 located between the first branch line FZX1 and the second branch line FZX2, the second shielding portion 92 being configured to receive a fixed potential signal.

[0083] When the wiring structure shown in Figure 13 is used to arrange the main line ZTX, the first branch line FZX1, and the second branch line FZX2, the first branch line FZX1 and the second branch line FZX2 are wired on different film layers, resulting in overlapping areas. When the overlapping first branch line FZX1 and the second branch line FZX2 correspond to different touch traces X0, the different touch signals transmitted by them may cause signal crosstalk, affecting touch accuracy. Therefore, this disclosure introduces a second shielding part 92 between the first branch line FZX1 and the second branch line. Since the second shielding part 92 receives a fixed potential signal, it can shield the signals of the first branch line FZX1 and the second branch line FZX2, which helps to avoid signal crosstalk and thus improves touch accuracy.

[0084] It should be noted that in the actual manufacturing process of the second shielding part 92, the second shielding part 92 can be introduced only in the overlapping area of ​​the first branch line FZX1 and the second branch line FZX2, or the area of ​​the second shielding part 92 can be expanded. For example, please continue to refer to Figures 13 and 14. In an optional embodiment of this disclosure, the second shielding part 92 extends along the first direction D1 and is arranged along the third direction D3; along the second direction D2, the second shielding part 92 overlaps with the second branch line FZX2 and is arranged in a one-to-one correspondence.

[0085] The second shielding portion 92 shown in Figure 14 not only covers the overlapping area of ​​the first branch line FZX1 and the second branch line FZX2, but also has a further enlarged area. Specifically, the top view structure of the second shielding portion 92 corresponds to the top view structure of the first branch line FZX1. Optionally, along the second direction, the projection of the second shielding portion 92 coincides with the projection of the first branch line FZX1, or the projection of the first branch line FZX1 is located within the projection range of the second shielding portion 92. By adopting the same wiring structure as the first branch line FZX1 to set the second shielding part 92, the structure of the second shielding part 92 can be simplified. In the overlapping area corresponding to the first branch line FZX1 and the second branch line FZX2, the overlapping area located in the same column along the first direction D1 corresponds to the same second shielding part 92. In this way, it is not necessary to set different second shielding parts 92 for different overlapping areas, which helps to reduce the number of second shielding parts 92 actually corresponding to the first branch line FZX1 and the second branch line FZX2. While ensuring that the overlapping area of ​​the first branch line FZX1 and the second branch line FZX2 is shielded by a corresponding second shielding part 92, it also helps to simplify the manufacturing process of the second shielding part 92.

[0086] Figure 15 shows another top view of the second shielding part 92 disposed between the first branch line FZX1 and the second branch line FZX2. Referring to Figures 14 and 15, in an optional embodiment of this disclosure, the second shielding part 92 includes a first end DB1 and a second end DB2 opposite to each other along the first direction D1. The first end DB1 of each second shielding part 92 is electrically connected, and the second end DB2 of each second shielding part 92 is electrically connected.

[0087] Compared to the embodiment shown in Figure 14, please refer to Figure 15. In this embodiment, the ends of each second shield 92 are electrically connected. For example, the first ends DB1 of each second shield 92 are electrically connected to each other, and the second ends DB2 of each second shield 92 are electrically connected to each other. In this way, each second shield 92 forms an integral structure and is at the same potential. When transmitting a fixed potential signal to the second shield 92, it is only necessary to lead out a single signal interface for the entire second shield 92. There is no need to introduce different signal interfaces for different second shields 92. Therefore, it is beneficial to simplify the connection between the second shield 92 and the fixed potential signal and to simplify the wiring structure of the functional area Q2.

[0088] It should be noted that Figures 14 and 15 show a scheme in which the second shielding part 92 is configured to have the same structure as the first branch line FZX1. In some other embodiments of this disclosure, the second shielding part 92 can also be configured to have the same structure as the second branch line FZX2. For example, please refer to Figures 16 and 17. Figure 16 shows another wiring diagram of the main body ZT, the first branch FZ1, and the second branch FZ2 in the touch trace X0 of the functional area Q2. Figure 17 shows another top view of the second shielding part 92 disposed between the first branch line FZX1 and the second branch line FZX2, wherein the second shielding part 92 is arranged along the third direction D3. Extending and arranged along the first direction D1, the length variation trend of the second shielding part 92 is the same as that of the second branch FZX2. Optionally, along the second direction D2, the projection of the second shielding part 92 coincides with that of the second branch FZX2, or the projection of the second branch FZX2 is located within the projection range of the second shielding part 92. In this case, among the multiple overlapping areas of the first branch FZX1 and the second straight line, the overlapping areas located in the same row along the third direction D3 correspond to the same second shielding part 92. It is not necessary to introduce different second shielding parts 92 for different overlapping areas, which also helps to reduce the number of second shielding parts 92 and simplify the manufacturing process of the display panel. Optionally, the end of the second shielding part 92 along the third direction D3 is electrically connected. In this way, the second shielding part 92 can also form an equipotential overall structure. Only one signal interface is needed to realize the transmission of fixed potential signals to the second shielding part 92, which also helps to simplify the connection between the second shielding part 92 and the fixed potential signal.

[0089] Referring appropriately to Figures 13 and 15, in one alternative embodiment of this disclosure, the display panel further includes a power signal line PX, which is configured to provide a DC power signal to the display area AA, and the second shield 92 is electrically connected to the power signal line PX.

[0090] Referring to Figure 10, the power signal line PX mentioned in this disclosure can be either a positive power signal line PVDD or a negative power signal line PVEE. In actual manufacturing, the second shield 92 can be electrically connected to either the positive power signal line PVDD or the negative power signal line PVEE. A DC power signal is provided to the second shield 92 through the positive power signal line PVDD or the negative power signal line PVEE as a fixed potential signal on the second shield 92. There is no need to introduce a new fixed potential signal for the second shield 92, which helps to simplify the number of signal terminals in the display panel and the structure of the display panel.

[0091] Figure 18 shows a schematic diagram of a film layer of the functional area Q2 of the display panel provided in this disclosure. Referring to Figure 18, in an optional embodiment of this disclosure, the display panel includes a substrate 00 and a plurality of metal layers disposed on one side of the substrate 00. Adjacent metal layers along the second direction D2 are isolated by an insulating layer. Along the direction from the substrate to the light-emitting surface of the display panel, the metal layers include a first metal layer M1, a second metal layer M2, a third metal layer M3, a first touch metal layer TM1, and a second touch metal layer TM2. In the functional area Q2, referring to Figures 10, 13 to 17, the main line ZTX and the first branch line FZX1 are located in the second touch metal layer TM2, the second branch line FZX2 is located in the third metal layer M3, the second shielding part 92 is located in the first touch metal layer TM1, the first shielding part 91 is located in the second metal layer M2, and the first signal line S1 is located on the side of the first shielding part 91 facing the substrate.

[0092] It should be noted that the embodiment shown in Figure 18 only illustrates the relative positional relationship of the first metal layer M1, the second metal layer M2, the third metal layer M3, the first touch metal layer TM1, and the second touch metal layer TM2 in functional area Q2, and does not represent the actual number of film layers in functional area Q2. In some other embodiments of the present invention, other conductive film layers may be included between two adjacent metal layers. For example, there may be a capacitive metal layer MC between the first metal layer M1 and the second metal layer M2. This disclosure does not specifically limit this. In this embodiment, the first metal layer M1, the second metal layer M2, the third metal layer M3, the first touch metal layer TM1, and the second touch metal layer TM2 are stacked along the direction from the substrate 00 to the metal layers located on the same side thereon, and the first metal layer M1 is closest to the substrate, while the second touch metal layer TM2 is farthest from the substrate.

[0093] In the display area AA, referring to Figure 5, the driving layer 40 includes multiple transistors M0. The gates of the transistors are typically disposed in the aforementioned first metal layer M1, and the sources (s) and drains (d) of the transistors are typically disposed in the aforementioned second metal layer M2. The third metal layer M3 can be used, for example, to provide the power signal line PX. The first touch metal layer TM1 and the second touch metal layer TM2 are used to provide the bridge line between the touch electrode T0 and the touch electrode. Referring to Figure 18, no transistors are disposed in the wiring area corresponding to functional area Q2, so these metal layers can be used for wiring. In this embodiment, in functional area Q2, the main line ZTX and the first branch line FZX1 are located in the second touch metal layer TM2, and the second branch line FZX2 is located in the third metal layer M3. The main line ZTX and the second branch line FZX2 are electrically connected through a connection hole penetrating the insulating layer between the second touch metal layer TM2 and the third metal layer M3. At this time, since the first touch metal layer TM1 does not have touch traces X0, the second shielding part 92 can be disposed in the first touch metal layer TM1, such that the second shielding part 92 is located between the film layers containing the first branch line FZX1 and the second branch line FZX2, thereby shielding the signal between the first branch line FZX1 and the second branch line FZX2 and avoiding signal crosstalk between the first branch line FZX1 and the second branch line FZX2. Optionally, in the functional area Q2, the second metal layer M2 and the third metal layer M3 are used to house the power signal line PX. It should be noted that in this embodiment, when the second branch line FZX2 is disposed in the third metal layer M3, the area in the third metal layer M3 where the second branch line FZX2 is disposed will not have the power signal line PX disposed. In this embodiment, when the second shielding part 92 is disposed in the first touch metal layer TM1, the second shielding part 92 and the power signal line PX retained on the third metal layer M3 can be connected through vias, thus eliminating the need to introduce a new fixed potential signal, which is beneficial for simplifying the structural design of the display panel.

[0094] For the first signal line S1 in functional area Q2, wiring can be performed on the first metal layer M1. Alternatively, wiring can be performed simultaneously on the capacitive metal layer MC between the first metal layer M1 and the second metal layer M2. That is, the first signal line S1 is located on the side of the second metal layer M2 facing the substrate. In this case, the first shielding part 91 can be disposed on the second metal layer M2, which is equivalent to placing the first shielding part 91 between the film layer where the touch trace X0 is located and the film layer where the first signal line S1 is located. Therefore, the first shielding part 91 can play a better signal shielding role, preventing the AC signal on the first signal line S1 from affecting the signal on the touch trace X0. Optionally, in functional area Q2, the second metal layer M2 and the third metal layer M3 are used to house the power signal line PX. In this case, the power signal line PX in the second metal layer M2 can be directly reused as the first shielding part 91, so there is no need to introduce a new film layer to house the first shielding part 91, which helps to simplify the film layer structure of the display panel.

[0095] Figure 19 shows another schematic diagram of the film layer of the functional area Q2 of the display panel provided in this disclosure. Referring to Figure 19, in an optional embodiment of this disclosure, the display panel includes a substrate 00 and a plurality of metal layers disposed on one side of the substrate 00. Adjacent metal layers along the second direction D2 are isolated by an insulating layer. Along the direction from the substrate to the light-emitting surface of the display panel, the metal layers include a first metal layer M1, a second metal layer M2, a third metal layer M3, a fourth metal layer M4, a first touch metal layer TM1, and a second touch metal layer TM2. In the functional area Q2, the main line ZTX and the first branch line FZX1 are located in the second touch metal layer TM2, the second branch line FZX2 is located in the third metal layer M3, the second shielding part 92 is located in the fourth metal layer M4, the first shielding part 91 is located in the second metal layer M2, and the first signal line S1 is located on the side of the first shielding part 91 facing the substrate.

[0096] The embodiment shown in Figure 19 differs from that in Figure 18 in that a fourth metal layer M4 is introduced between the first touch metal layer TM1 and the third metal layer M3. Other similarities will not be repeated. Optionally, the fourth metal layer M4 is used to house the power signal line PX. Referring to Figures 10, 13, and 19, in this embodiment, the main line ZTX and the first branch line FZX1 are also located on the second touch metal layer TM2, and the second branch line FZX2 is located on the third metal layer M3. Thus, the area between the layers containing the first branch line FZX1 and the second branch line FZX2 will include two metal film layers: the fourth metal layer M4 and the first touch metal layer TM1. In this case, the second shielding part 92 can be placed on the fourth metal layer M4, using the power signal line PX on the fourth metal layer M4 as the second shielding part 92. Therefore, it is unnecessary to introduce a new film layer and signal for the second shielding part 92 in the display panel, which simplifies the display panel design.

[0097] In this embodiment, the first signal line S1 in functional area Q2 can be wired using the first metal layer M1. Alternatively, it can be wired simultaneously using the capacitive metal layer MC between the first metal layer M1 and the second metal layer M2. That is, the first signal line S1 is located on the side of the second metal layer M2 facing the substrate. In this case, the first shielding part 91 can be disposed in the second metal layer M2, which is equivalent to disposing the first shielding part 91 between the film layer where the touch trace X0 is located and the film layer where the first signal line S1 is located. Therefore, the first shielding part 91 can exert a good signal shielding effect, preventing the AC signal on the first signal line S1 from affecting the signal on the touch trace X0. Optionally, in functional area Q2, the power signal line PX can be distributed in the second metal layer M2, the third metal layer M3, and the fourth metal layer M4 to reduce the voltage drop on the power signal line PX. In this case, the power signal line PX in the second metal layer M2 can be directly reused as the first shielding part 91, thus eliminating the need to introduce a new film layer to set the first shielding part 91, which simplifies the film layer structure of the display panel.

[0098] Figure 20 shows a wiring diagram of the first branch line FZX1 at the junction of the cross-line area KQ and the first area Q11. Figure 21 shows a comparative diagram corresponding to Figure 20. In the embodiment shown in Figure 20, a ramp structure XP is formed at the junction of the cross-line area KQ and the first area Q11. In the embodiment shown in Figure 21, no ramp structure XP is formed at the junction of the cross-line area KQ and the first area Q11. Referring to Figures 20, 21, 10, and 13, in an optional embodiment of this disclosure, the display panel includes a substrate 00 and a plurality of metal layers disposed on one side of the substrate 00. Adjacent metal layers along the second direction D2 are isolated by an insulating layer. Along the direction from the substrate to the light-emitting surface of the display panel, the metal layers include a first metal layer M1, a second metal layer M2, a third metal layer M3, a first touch metal layer TM1, and a second touch metal layer TM2. The first branch line FZX1 is located in the second touch metal layer TM2. Functional region Q2 includes a crossover region. The first branch line FZX1 and the second branch line FZX2 overlap in the crossover region KQ. In the crossover region KQ, the distance between the insulating layer of the first branch line FZX1 facing the substrate and the substrate is H1. Functional region Q2 also includes a first region Q11 adjacent to the crossover region. In the first region Q11, the distance between the insulating layer of the first branch line FZX1 facing the substrate and the substrate is H2, where H1 < H2. At the boundary between the crossover region and the first region, the insulating layer adjacent to the first branch line FZX1 and located on the substrate-facing side of the first branch line FZX1 includes a ramp structure XP. Along the direction from the crossover region to the first region, the height of the ramp gradually increases. The first branch line FZX1 extends to the first region Q11 via the ramp structure XP.

[0099] In this disclosure, in functional area Q2, power signal lines PX are distributed across at least two film layers and arranged in a planar pattern. For example, power signal lines PX are distributed at least between the second metal layer M2 and the third metal layer M3. Power signal lines PX located in the two metal layers and transmitting the same power signal are electrically connected, which helps to reduce the overall impedance of the power signal lines PX and reduce the voltage drop of the power signal transmitted by the power signal lines PX. When the second branch line FZX2 is located in the film layer where the original power signal line PX is located, for example, when the second branch line FZX2 is located in the cross-line area of ​​the third metal layer M3, the planar power signal line PX will no longer be provided in the cross-line area of ​​the third metal layer M3, but will be replaced by the strip-shaped second branch line FZX2. When an insulating layer is introduced on the side of the third metal layer M3 facing away from the substrate, in the cross-line region, the insulating layer will at least fill the spaces between the strip-shaped second branch lines FZX2. However, in other regions (the first region, which can be considered as other regions adjacent to the cross-line region in functional region Q2), the insulating layer is placed on the entire power signal line PX. This results in the overall thickness of the insulating layer in the cross-line region being less than the thickness of the insulating layer in other regions. For example, referring to Figure 20, a height difference occurs at the junction of the cross-line region KQ and the first region Q11. Since the film layer containing the first branch line FZX1 is located above the insulating layer, when the first branch line FZX1 extends further into the first region through the cross-line region, the position of the step difference may cause the first branch line FZX1 to break. Therefore, referring to Figure 20, this disclosure sets a ramp structure XP at the position of the step difference, and gradually increases the height of the ramp along the direction from the cross-line region to the first region, thereby achieving a smooth transition of the first branch line FZX1 from the cross-line region to the first region, effectively avoiding the problem of line breakage.

[0100] Please continue referring to Figure 20. In one optional embodiment of this disclosure, the angle between the inclined surface and the bottom surface of the slope structure XP is α, where α ≤ 50°. It should be noted that the smaller the angle between the inclined surface and the bottom surface of the slope structure XP, the gentler the slope, and the better it avoids the problem of line breakage in the first branch line FZX1. This disclosure sets the angle between the inclined surface and the bottom surface of the slope structure XP to less than or equal to 50°, which is more conducive to the smooth transition of the first branch line FZX1 to the first zone, and helps to improve the reliable coverage of the first branch line FZX1 at the junction of the crossing area and the first zone, thus avoiding the problem of line breakage.

[0101] When a slope structure XP is formed at the junction of the cross-line area and the first area, the upper surface of the inclined surface of the slope structure XP can be a flat structure. In some other embodiments of this disclosure, the upper surface of the inclined surface of the slope structure XP can also be set as a non-flat structure. For example, please refer to Figures 22 and 23. Figure 22 shows a top view of the slope structure XP and the first branch line FZX1. Figure 23 shows a CC-direction cross-sectional view corresponding to the structure in Figure 22. In an optional embodiment of this disclosure, the inclined surface of the slope structure XP includes a plurality of recesses AX extending from the bottom of the slope to the top of the slope. Along the second direction, the first branch line FZX1 overlaps with the recesses AX. Along the third direction D3, the width of the first branch line FZX1 is greater than the width of the recesses AX.

[0102] Please continue referring to Figures 22 and 23. In this embodiment, a recessed portion AX is introduced on the inclined surface of the slope structure XP. The recessed portion AX can be regarded as a structure that is recessed from the inclined surface to the bottom surface. The recessed portion AX is a strip-shaped structure extending from the top to the bottom of the slope structure XP, and the width of the slope structure XP is smaller than the line width of the first branch line FZX1. When the first branch line FZX1 extends on the slope structure XP, the first branch line FZX1 covers at least two recessed portions AX. At least a portion of the first branch line FZX1 will fill the recessed portions AX, which is more conducive to improving the coverage of the first branch line FZX1 on the slope structure XP and is more conducive to avoiding the problem of the first branch line FZX1 breaking.

[0103] Figure 22 shows a scheme in which a row of recesses AX are formed on the slope structure XP. Each recess AX extends from the top of the slope to the bottom of the slope. In some other embodiments of this disclosure, two or more rows of recesses AX can also be formed on the slope. For example, please refer to Figure 24. Figure 24 shows another top view of the slope structure XP and the first branch line FZX1. Compared with the embodiment shown in Figure 22, the length of the recesses AX in Figure 24 is shorter, but the overall extension direction of the recesses AX is the same as the extension direction of the recesses AX in Figure 20. When the first branch line FZX1 is formed on the inclined surface of the slope structure XP, the first branch line FZX1 can also fill the recesses AX to improve the coverage of the first branch line FZX1 on the inclined surface.

[0104] Based on the same inventive concept, this disclosure also provides a display device. Figure 25 shows a schematic diagram of a display device 200 provided in an embodiment of this disclosure. Referring to Figure 25, the display device 200 includes the display panel 100 in any of the above embodiments. The display device 200 provided in the embodiments of this disclosure can be any electronic device with display function, such as a touch screen, mobile phone, tablet computer, laptop computer, e-reader, or television. The display device 200 provided in the embodiments of this disclosure has the beneficial effects of the display panel provided in the embodiments of this disclosure. For details, please refer to the specific descriptions of the display panel in the above embodiments, which will not be repeated here.

[0105] It is understood that Figure 25 only illustrates one shape of the display device 200 using a rounded rectangle structure as an example. In some other embodiments of this disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and this disclosure does not specifically limit it in this regard.

[0106] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0107] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, include: A display area and a non-display area located outside the display area, the non-display area including a stepped area and a non-stepped area, the stepped area including a trace area and a functional area arranged along a first direction, the functional area being provided with bonding pins; Touch electrodes and touch signal lines electrically connected to the touch electrodes, the touch signal lines extending from the trace area to the functional area and electrically connected to the bonding pins, the portion of the touch signal lines located in the functional area being touch traces; The first signal line, located in the functional area, is configured to transmit AC signals; Along the second direction, the first signal line and the touch trace at least partially overlap, and the overlapping area of ​​the first signal line and the touch trace is isolated by a first shielding part, which is configured to receive a fixed potential signal. The second direction is perpendicular to the light-emitting surface of the display panel.

2. The display panel according to claim 1, characterized in that, It also includes a power signal line configured to provide a DC power signal to the display area, wherein the power signal line is multiplexed as the first shielding portion in the functional area.

3. The display panel according to claim 2, characterized in that, It also includes a substrate, the power signal line and the first signal line are located on the same side of the substrate, and the display panel also includes an organic insulating layer, the organic insulating layer being adjacent to the power signal line and located on the side of the power signal line facing the substrate; The power signal line is provided with multiple through holes. Along the second direction, the through holes penetrate the power signal line and do not overlap with the first signal line.

4. The display panel according to claim 1, characterized in that, In the functional area, the touch trace includes a main body and a first branch. The main body is electrically connected to the touch signal line, and the two ends of the first branch are electrically connected to the main body and the bonding pin, respectively. The display area includes a data line, the wiring area includes a first fan-out line electrically connected to the data line, and the functional area includes a second fan-out line electrically connected to the first fan-out line; along the second direction, the first branch and the second fan-out line do not overlap.

5. The display panel according to claim 4, characterized in that, Along the second direction, the main body portion does not overlap with the second fan-out line.

6. The display panel according to claim 5, characterized in that, In the functional area, the main body and the first branch are both located on both sides of the second fan-out line along a third direction, which intersects with the first direction and is perpendicular to the second direction.

7. The display panel according to claim 4, characterized in that, Along the second direction, the main body overlaps with the second fan-out line, and the first signal line includes the second fan-out line; the overlapping area of ​​the main body and the second fan-out line is isolated by the first shielding part.

8. The display panel according to claim 4, characterized in that, It also includes a test pin located in the functional area; the touch trace also includes a second branch located in the functional area, the two ends of the second branch being electrically connected to the main body and the test pin respectively; along the second direction, the second branch does not overlap with the second fan-out line.

9. The display panel according to claim 8, characterized in that, The non-stepped region includes a gate driving circuit, and the stepped region includes a drive signal fan-out line electrically connected to the gate driving circuit. The first signal line includes the drive signal fan-out line. In the functional area, the drive signal fan-out line is located on both sides of the second fan-out line along a third direction. The third direction intersects with the first direction and is perpendicular to the second direction. In the functional area, along the second direction, the drive signal fan-out line at least partially overlaps with the second branch, and the overlapping area of ​​the drive signal fan-out line and the second branch is isolated by the first shielding portion.

10. The display panel according to claim 4, characterized in that, It also includes a test pin located in the functional area, the test pin being located on the side of the bonding pin away from the first branch; The touch trace also includes an extension located in the functional area, with both ends of the extension electrically connected to the bonding pin and the test pin, respectively.

11. The display panel according to claim 1, characterized in that, The functional area also includes test pins; in the functional area, the touch trace includes a main body, a first branch, and a second branch. The main body is electrically connected to the touch signal line. The two ends of the first branch are electrically connected to the main body and the bonding pin, respectively. The two ends of the second branch are electrically connected to the main body and the test pin, respectively. Along the second direction, the main body, the first branch, and the second branch all overlap with the first shielding portion.

12. The display panel according to claim 1, characterized in that, The functional area also includes test pins; the touch traces include a main line, a first branch line and a second branch line, the main line is electrically connected to the touch signal line, the first branch line is electrically connected to the main line and the bonding pin respectively, and the second branch line is electrically connected to the main line and the test pin respectively. The first branch line and the main line are arranged on the same layer, and the second branch line and the main line are arranged on different layers and electrically connected through the first wire switching hole. The first branch line and the second branch line extend in different directions.

13. The display panel according to claim 12, characterized in that, The main line and the first branch line extend along the first direction and are arranged along the third direction, the second branch line is arranged along the first direction and extends along the third direction, and the first direction and the third direction intersect. The functional area includes a first center line extending along the first direction. On the same side of the first center line, along the third direction, in the direction from the first center line to the edge of the display panel, the length of the main line decreases, the length of the first branch line increases, and the first cable replacement hole is located between the main line and the first branch line.

14. The display panel according to claim 13, characterized in that, Along the second direction, the first branch and the second branch overlap; the display panel further includes a second shielding portion located between the first branch and the second branch, the second shielding portion being configured to receive a fixed potential signal.

15. The display panel according to claim 14, characterized in that, The second shielding portion extends along the first direction and is arranged along the third direction; along the second direction, the second shielding portion overlaps with the second branch line and is arranged in a one-to-one correspondence.

16. The display panel according to claim 15, characterized in that, The second shielding portion includes a first end and a second end that are opposite each other along a first direction, the first ends of each second shielding portion are electrically connected, and the second ends of each second shielding portion are electrically connected.

17. The display panel according to claim 14, characterized in that, It also includes a power signal line configured to provide a DC power signal to the display area, and the second shield is electrically connected to the power signal line.

18. The display panel according to claim 14, characterized in that, The display panel includes a substrate and a plurality of metal layers disposed on one side of the substrate, with adjacent metal layers along the second direction being separated by an insulating layer; Along the direction from the substrate to the light-emitting surface of the display panel, the metal layer includes a first metal layer, a second metal layer, a third metal layer, a first touch metal layer, and a second touch metal layer; in the functional area, the main line and the first branch line are located in the second touch metal layer, the second branch line is located in the third metal layer, the second shielding part is located in the first touch metal layer, the first shielding part is located in the second metal layer, and the first signal line is located on the side of the first shielding part facing the substrate.

19. The display panel according to claim 14, characterized in that, The display panel includes a substrate and a plurality of metal layers disposed on one side of the substrate, with adjacent metal layers along the second direction being separated by an insulating layer; Along the direction from the substrate to the light-emitting surface of the display panel, the metal layer includes a first metal layer, a second metal layer, a third metal layer, a fourth metal layer, a first touch metal layer, and a second touch metal layer; in the functional area, the main line and the first branch line are located in the second touch metal layer, the second branch line is located in the third metal layer, the second shielding part is located in the fourth metal layer, the first shielding part is located in the second metal layer, and the first signal line is located on the side of the first shielding part facing the substrate.

20. The display panel according to claim 14, characterized in that, The display panel includes a substrate and a plurality of metal layers disposed on one side of the substrate, with adjacent metal layers along the second direction being separated by an insulating layer; Along the direction from the substrate to the light-emitting surface of the display panel, the metal layer includes a first metal layer, a second metal layer, a third metal layer, a first touch metal layer, and a second touch metal layer; the first branch is located in the second touch metal layer, and the second branch is located in the third metal layer; The functional area includes a crossover area, where the first branch line and the second branch line overlap. In the crossover area, the distance between the insulating layer on the side of the first branch line facing the substrate and the substrate is H1. The functional area includes a first area adjacent to the crossover area, where the distance between the insulating layer on the side of the first branch line facing the substrate and the substrate is H2, where H1 < H2. At the boundary between the crossover area and the first area, the insulating layer adjacent to the first branch and located on the side of the first branch facing the substrate includes a ramp structure. The height of the ramp gradually increases along the direction from the crossover area to the first area, and the first branch extends to the first area via the ramp structure.

21. The display panel according to claim 20, characterized in that, The angle between the inclined surface and the bottom surface of the slope structure is α, where α ≤ 50°.

22. The display panel according to claim 20, characterized in that, The inclined surface of the slope structure includes a plurality of recesses extending from the bottom of the slope to the top of the slope. Along the second direction, the first branch line overlaps with the recesses. Along the third direction, the width of the first branch line is greater than the width of the recesses.

23. The display panel according to claim 1, characterized in that, The stepped area also includes a bending area, which is located between the wiring area and the functional area. The functional area is bent through the bending area to the side of the display panel that is away from the light-emitting surface.

24. A display device, characterized in that, Includes the display panel described in any one of claims 1 to 23.

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