Display panel and display device

Abstract

The utility model provides a display panel and a display device, and relates to the technical field of display, the display panel comprises a display area and a non-display area arranged outside the display area, the non-display area comprises a step area and a non-step area, the step area comprises a wiring area and a functional area which are arranged along a first direction, and the functional area is provided with binding pins; the touch signal lines are electrically connected with the touch electrodes, the touch signal lines extend from the wiring area to the functional area and are electrically connected with the binding pins, and the parts, located in the functional area, of the touch signal lines are touch wires; a first signal line located in the functional area and configured to transmit an alternating current signal; in the second direction, the first signal lines and the touch wires are at least partially overlapped, the overlapping area of the first signal lines and the touch wires is isolated by first shielding parts, the first shielding parts are configured to receive fixed potential signals, and the second direction is perpendicular to the light emitting face of the display panel. Therefore, the interference of other signals in the panel on the touch signal can be reduced or avoided.

Description

Technical Field

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

[0002] With the continuous development of science and technology, more and more display products, such as mobile phones, tablet computers, laptop computers, and smart wearable devices, etc., are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable important tool for people today.

[0003] For display products with touch functions, how to reduce or avoid the interference of other signals in the display product on the touch signal and improve the touch accuracy has become one of the technical problems to be solved urgently at present. Summary of the Utility Model

[0004] To solve the above technical problems, the present disclosure provides a display panel and a display device, aiming to reduce or avoid the interference of other signals in the display panel on touch and improve the touch accuracy.

[0005] In a first aspect, the present disclosure provides a display panel, including:

[0006] A display area and a non-display area disposed outside the display area. The non-display area includes a stepped area and a non-stepped area. The stepped area includes a wiring area and a functional area arranged along a first direction. The functional area is provided with bonding pins;

[0007] A touch electrode and a touch signal line electrically connected to the touch electrode. The touch signal line extends from the wiring area to the functional area and is electrically connected to the bonding pin. The part of the touch signal line located in the functional area is a touch trace;

[0008] A first signal line, located in the functional area, configured to transmit an alternating current signal;

[0009] Along a second direction, the first signal line and the touch trace at least partially overlap. The overlapping area of the first signal line and the touch trace is isolated by a first shielding portion. The first shielding portion is configured to receive a fixed potential signal. The second direction is perpendicular to the light-emitting surface of the display panel.

[0010] In a second aspect, based on the same inventive concept, the present disclosure further provides a display device, including the display panel provided in the first aspect of the present disclosure.

[0011] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0012] In the display panel and the display device provided by the present disclosure, the touch signal line connected to the touch electrode extends to the functional area and is electrically connected to the bonding pins in the functional area. In addition to the touch signal line, some other signal lines in the display panel (the first signal lines mentioned in the present disclosure) also lead to the functional area and are electrically connected to other bonding pins in the functional area. Among them, the first signal lines include the signal lines for transmitting alternating current signals in the functional area, such as the signal lines for transmitting data signals, the signal lines for transmitting clock signals, etc. The signals transmitted by these signal lines are not constant direct current signals, but jumping alternating current signals. In the functional area, due to a large number of wirings, the touch trace overlaps with the first signal line, and the signal transmitted on the first signal line is an alternating current signal. When the signal on the first signal line jumps, due to the coupling effect, the signal on the touch trace will jump accordingly, thus affecting the accuracy of the touch signal transmitted on the touch trace and the touch accuracy. Therefore, the present 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. Through the first shielding portion, the signal coupling between the first signal line and the touch trace can be shielded, which is beneficial to reducing or avoiding the influence of the signal jump on the first signal line on the touch signal on the touch trace, and further beneficial to improving the touch accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a planar structure diagram of a display panel provided by an embodiment of the present disclosure;

[0016] Figure 2 It shows a connection schematic diagram of touch electrodes and touch signal lines in a display panel provided by an embodiment of the present disclosure;

[0017] Figure 3 It shows Figure 1 An enlarged schematic diagram of area A in

[0018] Figure 4 It shows a pixel arrangement schematic diagram in a display panel provided by an embodiment of the present disclosure;

[0019] Figure 5 It shows Figure 4A sectional view of the display panel in the AA direction;

[0020] Figure 6 Shown is a top view of a touch signal line, a power signal line, and a first signal line;

[0021] Figure 7 Shown is Figure 6 A schematic diagram of the film layer in the BB direction;

[0022] Figure 8 Shown is a wiring schematic diagram of the data line in the display panel provided by the present disclosure;

[0023] Figure 9 Shown is Figure 1 Another enlarged schematic diagram of area A in;

[0024] Figure 10 Shown is Figure 1 Another enlarged schematic diagram of area A in;

[0025] Figure 11 Shown is Figure 1 Another enlarged schematic diagram of area A in;

[0026] Figure 12 Shown is a relative position relationship diagram of the touch trace, the first signal line, and the first shielding portion in the functional area;

[0027] Figure 13 Shown is Figure 9 , Figure 10 or Figure 11 A wiring schematic diagram of the main body portion, the first branch portion, and the second branch portion in the touch trace of the functional area;

[0028] Figure 14 Shown is a top view of the second shielding portion provided between the first branch line and the second branch line;

[0029] Figure 15 Shown is another top view of the second shielding portion provided between the first branch line and the second branch line;

[0030] Figure 16 Shown is another wiring schematic diagram of the main body portion, the first branch portion, and the second branch portion in the touch trace of the functional area;

[0031] Figure 17 Shown is another top view of the second shielding portion provided between the first branch line and the second branch line;

[0032] Figure 18 Shown is a schematic diagram of the film layer of the functional area of the display panel provided by the present disclosure;

[0033] Figure 19 Another schematic diagram of the functional layer of the display panel provided by the present disclosure is shown;

[0034] Figure 20 A wiring schematic diagram of the first branch line at the junction of the cross-line area and the first area is shown;

[0035] Figure 21 Shown as Figure 20 A corresponding comparison schematic diagram;

[0036] Figure 22 A top view of the ramp structure and the first branch line is shown;

[0037] Figure 23 Shown as Figure 22 A CC-direction cross-sectional view corresponding to the structure;

[0038] Figure 24 Another top view of the ramp structure and the first branch line is shown;

[0039] Figure 25 A schematic structural diagram of a display device provided by an embodiment of the present disclosure is shown. Detailed implementation manners

[0040] In order to be able to more clearly understand the above objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0041] Many specific details are set forth in the following description in order to provide a thorough understanding of the present disclosure, but the present disclosure may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0042] Figure 1 A planar structure diagram of a display panel provided by an embodiment of the present disclosure, Figure 2 A connection schematic diagram of the touch electrode T0 and the touch signal line X in the display panel provided by an embodiment of the present disclosure is shown, Figure 3 Shown as Figure 1 An enlarged schematic diagram of area A in Figures 1 to 3 , the present disclosure provides a display panel 100, including:

[0043] A display area AA and a non-display area A0 disposed 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 wiring area Q1 and a functional area Q2 arranged along a first direction D1. The functional area Q2 is provided with a bonding pin B0. Wherein, 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 of the display panel except the stepped area A1, for example, including a left border, a right border, and an upper border.

[0044] The display panel 100 further 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 wiring area Q1 to the functional area Q2 and is electrically connected to the bonding pin B0. The part of the touch signal line X located in the functional area Q2 is a touch trace X0. Optionally, the touch electrode T0 is a mutual capacitance touch electrode as shown in Figure 2 The mutual capacitance touch electrode includes 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. In this embodiment, the touch signal line X1 extends from below the display area to the stepped area, and the touch signal line X2 extends from the non-stepped area to below the display area and then extends to the stepped area as an example for illustration, but it is not limited thereto. In some other embodiments of the present disclosure, both the touch signal lines X1 and X2 can also directly extend to the stepped area through below the display area. In some other embodiments of the present disclosure, the touch electrode can also be embodied as a self-capacitance touch electrode, and the touch signal line is a signal line connected to the self-capacitance touch electrode.

[0045] The display panel further includes a first signal line S1. The first signal line S1 is located in the functional area Q2 and is configured to transmit an alternating current signal. The first signal line S1 is, for example, a signal line that provides signals required for display to the circuit in the display panel to implement the display function, such as at least one of signal lines such as a data line, a clock signal line, a gate driving signal line, and a light emission control signal line.

[0046] Along a second direction, the first signal line S1 and the touch trace X0 at least partially overlap. The overlapping area of the first signal line S1 and the touch trace X0 is isolated by a first shielding portion 91. The first shielding portion 91 is configured to receive a fixed potential signal. The second direction is perpendicular to the light-emitting surface of the display panel.

[0047] It should be noted that Figure 1 and Figure 2Taking the display panel with a rectangular structure as an example for illustration, the actual shape of the display panel is not limited. In some other embodiments of the present disclosure, the display panel may also be embodied as any other feasible structure, such as a rounded rectangle, a circle, etc. Optionally, the step region A1 in the present disclosure further includes a bending region Q0, and the bending region Q0 is located between the wiring region Q1 and the functional region Q2. The functional region Q2 is bent to the side of the display panel facing away from the light-emitting surface through the bending region Q0. Through the bending region Q0, the functional region Q2 can be bent to the non-light-emitting surface of the display panel to reduce the width of the lower border of the display panel and achieve a narrow border effect. It should be noted that Figure 1 and Figure 3 The embodiment only shows the scheme where the display panel has not been bent.

[0048] Optionally, the display panel provided in this embodiment may be a display panel using organic light-emitting diode display technology, that is, an OLED (Organic Light-Emitting Diode) display panel. For example, please refer to Figure 4 and Figure 5 , where Figure 4 shows a schematic diagram of a pixel arrangement in the display panel provided by the embodiment of the present disclosure. Figure 5 As shown is Figure 4 a cross-sectional view of the display panel in AA direction in Figure 4 . It should be noted that Figure 5 the pixel arrangement structure shown is only schematic and does not limit the actual pixel arrangement method and the number of pixels included in the display panel. Please refer 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 an appropriate voltage is supplied by the power supply, the holes of the anode 301 and the electrons of the cathode 303 will combine in the light-emitting material layer 302 to generate bright light. Compared with the thin-film field-effect transistor liquid crystal display, the OLED display panel has the characteristics of high visibility and high brightness, and is more power-saving, light in weight, and thin in thickness. Of course, in some other embodiments of the present disclosure, 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. The present disclosure is not limited thereto.

[0049] Taking Figure 4 and Figure 5Taking the display panel as an example, the display layer 10 includes a pixel definition layer 19 that defines a plurality of pixel openings; a light-emitting material layer 302 is at least located in the pixel openings. Along the second direction D2, an anode 301 and a cathode 303 are respectively located on both 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, a packaging layer 50 is further 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 packaging layer 50 facing away from the cathode 303. Optionally, the packaging layer 50 includes a first inorganic layer 51, an organic layer 52, and a second organic layer 53 that are stacked. The display panel further includes a driving layer 40 disposed between the substrate 00 and the display layer 10. A driving circuit is provided in the driving layer 40 for providing a driving voltage to the display layer 10 to drive the display layer 10 to emit light. The driving circuit includes a plurality of transistors M0.

[0050] Please continue to refer to Figure 2 and Figure 3 , a touch signal line X connected to the touch electrode T0 extends to the functional area Q2 and is electrically connected to a bonding pin B0 in the functional area Q2. Optionally, the bonding pin B0 is used to bond a driving chip, and the driving chip may be, for example, a chip integrating a touch driving chip and a display driving 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) also lead to the functional area Q2 and are electrically connected to other bonding pins B0 in the functional area Q2. The first signal line S1 includes signal lines in the functional area Q2 for transmitting alternating current 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 direct current signals but jumping alternating current signals. In the functional area Q2, due to a large number of wirings, the touch trace X0 and the first signal line S1 will overlap. Since the signal transmitted on the first signal line S1 is an alternating current signal, when the signal on the first signal line S1 jumps, due to the coupling effect, the signal on the touch trace X0 will also jump accordingly, thus affecting the accuracy of the touch signal transmitted on the touch trace X0 and affecting the touch accuracy. Therefore, the present 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 the first shielding portion 91 is a fixed potential signal. Through the first shielding portion 91, the signal coupling between the first signal line S1 and the touch trace X0 can be shielded, thereby facilitating reducing or avoiding the influence of the signal jump on the first signal line S1 on the touch signal on the touch trace X0, and further facilitating improving the touch accuracy.

[0051] It should be noted that for the touch signal line X, in Figure 3 only the touch signal lines X1 and X2 are schematically shown with different fillings. In fact, Figure 3 the shown touch signal lines X1 and X2 respectively include a plurality of independent ones such asFigure 2 The touch signal lines shown Figure 3 The schematic manner is only to more clearly show the arrangement of the touch signal lines in the display panel.

[0052] Please continue to refer to Figure 3 , in an alternative embodiment of the present disclosure, the display panel further includes a power supply signal line PX, and the power supply signal line PX is configured to provide a DC power supply signal to the display area AA. In the functional area Q2, the power supply signal line PX is reused as the first shielding portion 91.

[0053] 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 supply signal line PX. The power supply signal line PX includes a positive power supply signal line PVDD and a negative power supply signal line PVEE. Optionally, the negative electrode of the light-emitting element is connected to the negative power supply signal line PVEE, the positive electrode is connected to the pixel driving circuit, and the pixel driving circuit is connected to the positive power supply signal line PVDD. The signal transmitted on the power supply signal line PX is a constant DC power supply signal. For the specific structure of the pixel driving circuit, reference can be made to the structures of related prior arts, and the present disclosure does not limit this. In the display panel, the power supply signal line PX extends from the display area AA to the functional area Q2, and after obtaining the power supply signal through the functional area Q2, it is transmitted to the display area AA. For example, the power supply signal line PX can be electrically connected to the flexible printed circuit board FPC in the functional area Q2 to obtain the power supply signal through the flexible printed circuit board FPC. In the functional area Q2, the present disclosure reuses the power supply signal line PX as the first shielding portion 91 to shield the signal coupling between the first signal line S1 and the touch trace X0. In this way, there is no need to introduce a new film layer structure in the functional area Q2 to manufacture the first shielding portion 91, which is beneficial to simplifying the manufacturing process of the display panel and improving the production efficiency of the display panel.

[0054] Figure 6 Shown is a top view of the touch signal line X, the power supply signal line PX, and the first signal line S1. Figure 7 Shown is Figure 6 a schematic view of the film layer in the BB direction of Figure 6 and Figure 7 , in an alternative embodiment of the present disclosure, the display panel further includes a substrate 00. The power supply 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. The organic insulating layer JY is adjacent to the power supply signal line PX and is located on the side of the power supply signal line PX facing the substrate 00. A plurality of through holes K are provided on the power supply signal line PX. Along the second direction D2, the through holes K penetrate through the power supply signal line PX, and the through holes K do not overlap with the first signal line S1.

[0055] The organic insulating layer JY in the display panel can be embodied as a flat layer, for example. The power supply signal line PX is located on the side of the organic insulating layer JY away from the substrate 00. To reduce the voltage drop of the power supply voltage signal, when forming the power supply signal line PX in the functional area Q2 of the display panel, if space permits, the power supply signal line PX is usually set to have a relatively large line width, for example, set as a planar structure. The organic insulating layer JY is made of an organic material. After undergoing a high-temperature process, the organic material will volatilize some water vapor and other substances. When a large area of metal covers the organic insulating layer, the volatile substances of the organic insulating layer usually cannot penetrate the metal layer with a dense film quality, for example, cannot penetrate the power supply signal line PX, resulting in bulges on the surface of the power supply signal line PX in individual areas, causing defects. Therefore, in the present disclosure, a plurality of through holes K are provided on the power supply signal line PX. When the organic insulating layer generates volatile substances, the volatile substances can volatilize through the through holes K, thereby avoiding the problem of bulging of the power supply signal line PX caused by the difficulty of volatilization of the volatile substances. In addition, the present disclosure defines that the through holes K do not overlap with the first signal line S1 along the second direction D2, which can prevent the signal of the first signal line S1 from passing through the through holes K and coupling to the touch trace, so as to ensure the signal shielding effect when the power supply signal line PX is reused as the first shielding portion 91.

[0056] Please continue to refer to Figure 3 , in an alternative embodiment of the present disclosure, in the functional area Q2, the touch trace X0 includes a main body portion ZT and a first branch portion FZ1. The main body portion ZT is electrically connected to the touch signal line X, and both ends of the first branch portion FZ1 are electrically connected to the main body portion ZT and the bonding pin B0 respectively. It should be noted that when the signal lines connected to the touch electrodes include the touch signal lines X1 and X2, the corresponding touch traces X0 of the touch signal lines X1 and X2 can both include the main body portion ZT and the first branch portion FZ1.

[0057] Figure 3 Only the structures filled with the same are used to illustrate the first fan-out lines SC1 and SC2, but in fact, both the first fan-out lines SC1 and SC2 include multiple independent signal lines, for example, reference can be made to Figure 8 , Figure 8 As shown in the wiring schematic diagram of the data line DL in the display panel provided by the embodiment of the present disclosure. The display area AA includes the data line DL, the routing 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 portion FZ1 does not overlap with the second fan-out line SC2.

[0058] When the present disclosure arranges the touch trace X0 in the functional area Q2, the main body portion ZT in the touch trace X0 is located on the side of the first branch portion FZ1 facing the display area AA, Figure 3In the illustrated embodiment, the main body portion ZT extends along the first direction D1. After the portion of the first branch portion FZ1 connected to the main body portion ZT extends along the third direction D3, it further extends to the position where the bonding pin B0 is located. It should be noted that both the main body portion ZT and the first branch portion FZ1 include a plurality of touch signal lines X.

[0059] Please continue to refer to Figure 3 and Figure 8 , the data line DL in the display area AA is used to provide data signals to the pixel driving circuits corresponding to the light emitting elements. After the data line DL is led out from the display area AA, it extends to the bonding pin B0 in the 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 the functional area Q2, one arrangement of the touch trace X0 and the second fan-out line SC2 is that the first branch portion FZ1 of the touch trace X0 winds around the outside of the second fan-out line SC2. In this way, it is possible to avoid the overlap between the first branch portion FZ1 and the second fan-out line SC2, which is beneficial to avoiding the influence of the data signals transmitted on the second fan-out line SC2 on the touch signals transmitted on the first branch portion FZ1, so as to improve the accuracy of touch signal transmission.

[0060] Please continue to refer to Figure 3 , in an alternative embodiment of the present disclosure, along the second direction D2, the main body portion ZT does not overlap with the second fan-out line SC2. In this embodiment, neither the main body portion ZT nor the first branch portion FZ1 corresponding to the touch trace X0 overlaps with the second fan-out line SC2. Therefore, it is beneficial to avoid the coupling influence of the data signals transmitted on the second fan-out line SC2 on the touch signals transmitted on the main body portion ZT and the first branch portion FZ1, which is more beneficial to improving the transmission accuracy of touch signals.

[0061] Continue to refer to Figure 3 , in an alternative embodiment of the present disclosure, in the functional area Q2, both the main body portion ZT and the first branch portion FZ1 are 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 this way, it is equivalent to winding the main body portion ZT and the first branch portion FZ1 of the touch trace X0 on both sides of the second fan-out line SC2, avoiding arranging the main body portion ZT and the first branch portion FZ1 in the area where the second fan-out line SC2 is located, so as to avoid the signal coupling influence caused by the overlap between the main body portion ZT and the first branch portion FZ1 and the second fan-out line SC2. Therefore, it is beneficial to improve the accuracy of touch signal transmission. Optionally, please refer to Figure 3, the touch signal line X further includes a lead-out portion YC that connects the touch signal line X in the display area AA and the main body portion ZT in the functional area Q2 respectively. The lead-out portion YC is located in the routing area Q1. Along the transmission direction of the touch signal, the lead-out portion YC is located between the main body portion ZT and the touch electrode T0 in the display area AA. In this embodiment, the connection position of the main body portion ZT and the lead-out portion YC can be set on both sides of the first fan-out line SC1 along the third direction D3, so as to avoid the overlap between the main body portion ZT and the first fan-out line SC1.

[0062] Figure 9 As shown in Figure 1 Another enlarged schematic diagram of area A in Figure 3 , the difference is that the connection positions of the main body portion ZT and the lead-out portion YC are different. Please refer to Figure 9 , in an alternative embodiment of the present disclosure, along the second direction (the direction perpendicular to the light-emitting surface of the display panel), the main body portion 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 portion ZT and the second fan-out line SC2 is isolated by the first shielding portion 91.

[0063] Compared with Figure 3 , Figure 9 in the embodiment, the connection position of the main body portion ZT and the lead-out portion YC is closer to the center position of the lower border of the display panel, while Figure 3 in Figure 9 the connection position of the main body portion ZT and the lead-out portion YC is closer to the two side edge positions of the lower border of the display panel. In practical applications, the connection position of the main body portion ZT and the lead-out portion YC can be selected according to the actual situation. As Figure 9 shown, when the connection position of the main body portion ZT and the lead-out portion YC is closer to the center position of the lower border of the display panel, the main body portion ZT will overlap with the second fan-out line SC2. At this time, the first shielding portion 91 can be introduced into the overlapping area of the main body portion ZT and the second fan-out line SC2, and the first shielding portion 91 is used to shield the signal between the main body portion ZT and the second fan-out line SC2, so as to avoid the interference problem between the data signal on the second fan-out line SC2 and the touch signal on the main body portion ZT. When the main body portion ZT overlaps with the second fan-out line SC2, the first branch portion FZ1 can also be wired around the second fan-out line SC2 to avoid the overlap between the first branch portion FZ1 and the second fan-out line SC2, thereby reducing the overlapping area of the touch trace X0 and the second fan-out line SC2 and reducing the signal interference between the two.

[0064] It should be noted that when the main body portion ZT or the first branch portion FZ1 also overlaps with other fan-out lines, the first shielding portion 91 can also be used to shield the interference signal between the fan-out line and the main body portion ZT, which is also beneficial to improving the transmission accuracy of the touch signal.

[0065] Figure 10 Another enlarged schematic diagram of region A in Figure 1 is shown. Compared with Figure 3 , the difference lies in that Figure 10 the touch trace X0 in the embodiment further includes a second branch FZ2. Please refer to Figure 10 , in an alternative embodiment of the present disclosure, the display panel further includes a test pin VT-P located in the functional area Q2; the touch trace X0 further includes a second branch FZ2 located in the functional area Q2, and both 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.

[0066] This embodiment shows a solution of introducing the test pin VT-P in the functional area Q2. During the manufacturing process of the display panel, before assembling the finished product, various functions of the display panel can be tested through the test pin VT-P. In this embodiment, the touch trace X0 in the functional area Q2 is divided into two paths, namely the first branch FZ1 and the 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 connecting the second branch FZ2 of the touch trace X0 to the test pin VT-P, the touch performance of the display panel can be tested through the test pin VT-P. Optionally, the test pin VT-P is located at the lower left border and the lower right border of the functional area Q2. In this way, when connecting the second branch FZ2 to the test pin VT-P, the second branch FZ2 can be prevented from overlapping with the second fan-out line SC2, thereby avoiding the data signal transmitted on the second fan-out line SC2 from affecting the touch signal transmitted on the second branch FZ2, which is beneficial to improving the accuracy of touch signal transmission during the test stage.

[0067] In the present disclosure, the power supply signal line PX is connected to the flexible printed circuit board FPC to obtain the power supply signal through the flexible printed circuit board FPC. Optionally, the test pin VT-P is located on the side of the flexible printed circuit board away from the bonding pin B0. When connecting the second branch FZ2 to the bonding pin B0, the second branch FZ2 can extend through the area where the flexible printed circuit board FPC is located to the position where the test pin VT-P is located. 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 according to requirements, and the present disclosure does not make specific limitations on this.

[0068] Please continue to refer to Figure 10, in an alternative embodiment of the present disclosure, the non-step region A2 includes a gate driving circuit (not shown in the figure, which is used to provide a gate driving signal to the pixel circuit and may be located, for example, on the left and right borders of the display panel), the step region A1 includes a driving signal fan-out line VSR-X electrically connected to the gate driving circuit, the first signal line S1 includes the aforementioned driving signal fan-out line VSR-X, in the functional region Q2, the driving signal fan-out line VSR-X is located on both sides of the second fan-out line SC2 along the third direction D3, and 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 driving signal fan-out line VSR-X at least partially overlaps with the second branch FZ2, and the overlapping region between the driving signal fan-out line VSR-X and the second branch FZ2 is isolated by the first shielding portion 91. It should be noted that in the embodiments of the present disclosure, the positive power supply signal line PVDD and the negative power supply signal line PVEE are schematically shown with different fillings, but this does not represent their specific film layers. Since both the positive power supply signal line PVDD and the negative power supply signal line PVEE can be reused as the first shielding portion 91, there may be a situation where different first shielding portions 91 correspond to different fillings in the schematic diagram.

[0069] Specifically, when a gate driving circuit for providing a gate driving signal to the pixel driving circuit is provided in the display panel, the gate driving circuit is located in the non-step region, for example, in the left and right border regions 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 step region. Since the gate driving circuit is located in the left and right border regions of the display panel, for simplicity of wiring, the gate driving signal fan-out line connected to the gate driving circuit can be arranged at positions near the edges on both sides of the step region, that is, on both sides of the second fan-out line SC2 along the third direction D3, to avoid the overlap between the gate driving signal fan-out line and the second fan-out line SC2, thereby facilitating the avoidance of 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 region or the lower right region of the functional region Q2, the second branch FZ2 is also located at a position near its left edge or right edge in the functional region Q2. In this way, the driving signal fan-out line VSR-X and the second branch FZ2 will overlap. At this time, the driving signal fan-out line VSR-X is equivalent to the first signal line S1 in the present disclosure, and the first shielding portion 91 can be introduced between the driving signal fan-out line VSR-X and the second branch FZ2 to shield the signals of the two, thus facilitating the avoidance of the problem of signal crosstalk. It should be noted that the first shielding portion 91 here can reuse the positive power supply signal line PVDD or the negative power supply signal line PVEE, and the present disclosure does not specifically limit this.

[0070] Figure 10The illustrated embodiment shows a solution where the touch trace X0 is divided into two branches from the main body ZT, namely the first branch FZ1 and the second branch FZ2, and the electrical connection with the test pin VT-P is achieved through the second branch FZ2. In some other embodiments of the present disclosure, the connection between the touch trace X0 and the test pin VT-P can also be achieved through other wiring methods. For example, please refer to Figure 11 , Figure 11 As shown in Figure 1 , another enlarged schematic diagram of area A in

[0071] Figure 11 . In an alternative embodiment of the present 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 further includes an extension part YS located in the functional area Q2. Both ends of the extension part YS are electrically connected to the bonding pin B0 and the test pin VT-P respectively. Figure 10 The difference between the illustrated embodiment and Figure 10 is that the position of the test pin VT-P in the functional area Q2 is different, and the connection method between the touch trace X0 and the test pin VT-P is different. Figure 11 In the illustrated embodiment, the test pin VT-P is located in the lower left area and the lower right area of the functional area Q2. Figure 11 In the illustrated embodiment, the test pin VT-P is located below the bonding pin B0 and close to the center line of the functional area Q2. During the manufacturing process of the display panel, the position of the test pin VT-P can be set according to the actual situation. Please refer to

[0072] . In this embodiment, taking the test pin VT-P being directly below the bonding pin B0 as an example, to achieve the test of the touch function, the touch trace X0 needs to be connected to the test pin VT-P. In this embodiment, the extension part YS is introduced. The extension part YS is led out from the bonding pin B0 connected to the first branch FZ1 and directly extends to the position where the test pin VT-P is located, without being led out from the main body ZT. Such a setting simplifies the wiring complexity of the connection between the touch trace X0 and the test pin VT-P, and at the same time reduces the wiring length, which is beneficial to simplifying the wiring process of the display panel while realizing touch detection.

[0073] Figure 12Shown is a relative position relationship diagram of the touch trace X0, the first signal line S1, and the first shielding portion 91 in the functional area Q2. Please refer to Figure 12 , in an alternative embodiment of the present disclosure, the functional area Q2 further includes a test pin VT-P; in the functional area Q2, the touch trace X0 includes a main body portion ZT, a first branch portion FZ1, and a second branch portion FZ2. The main body portion ZT is electrically connected to the touch signal line in the trace area. Both ends of the first branch portion FZ1 are respectively electrically connected to the main body portion ZT and the bonding pin B0. Both ends of the second branch portion FZ2 are respectively electrically connected to the main body portion ZT and the test pin VT-P; along the second direction, the main body portion ZT, the first branch portion FZ1, and the second branch portion FZ2 all overlap with the first shielding portion 91.

[0074] It should be noted that Figure 12 The embodiment only shows a relative position relationship diagram of the touch trace X0, the first shielding portion 91, and the first signal line S1 in the functional area Q2, and does not show other signal lines in the functional area Q2. Additionally, although the touch trace X0 in this embodiment is schematically shown with a unified filling, in fact, the touch trace X0 includes multiple independent signal lines. Similarly, although the first signal line S1 in this embodiment is schematically shown with a unified filling, in fact, the first signal line S1 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 for transmitting AC signals. Two branch portions are led out from the main body portion ZT corresponding to the touch trace X0, which are the first branch portion FZ1 and the second branch portion FZ2 respectively. The first branch portion FZ1 is used to be electrically connected to the bonding pin B0, and the second branch portion FZ2 is used to be electrically connected to the test pin VT-P. Optionally, the bonding area where the bonding pin B0 corresponding to the first branch portion FZ1 is located is used to be electrically connected to the driving chip. The test pin VT-P is located under the flexible printed circuit board FPC. The second branch portion FZ2 passes through the area where the flexible printed circuit board is located and is electrically connected to the test pin VT-P. The power signal line PX is electrically connected to the flexible printed circuit board to obtain the power voltage signal through the flexible printed circuit board. Optionally, some signal lines in the first signal line S1 also pass through the area where the flexible circuit board is located and are electrically connected to the test pin VT-P to achieve the test function.

[0075] This embodiment shows a case where both the first branch FZ1 and the second branch FZ2 of the touch trace X0 overlap with the first signal line S1. At this time, 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. In particular, the first shielding portion 91 is provided in both the overlapping region between the first branch FZ1 and the first signal line S1 and the overlapping region between the second branch FZ2 and the first signal line S1 to shield the signal interference of the first signal line S1 on the touch trace X0. It should be noted that the first shielding portion 91 can reuse at least one of the positive power supply signal line PVDD and the negative power supply signal line PVEE in the display panel. This embodiment shows a solution in which the first shielding portion 91 overlapping with the main body ZT and the second branch FZ2 includes the negative power supply signal line PVEE, and the first shielding portion 91 overlapping with the first branch FZ1 includes the positive power supply signal line PVDD and the negative power supply signal line PVEE, but the present disclosure is not limited thereto. If the regions where the positive power supply signal line PVDD and the negative power supply signal line PVEE are located in the actual manufacturing process do not include the above overlapping regions, the positive power supply signal line PVDD or the negative power supply signal line PVEE can be extended to extend to the aforementioned overlapping regions to perform the signal shielding function. In this way, there is no need to introduce another structure in the display panel as the first shielding portion 91, so it is beneficial to simplify the overall structure and manufacturing process of the display panel.

[0076] Figure 13 as shown Figure 9 、 Figure 10 or Figure 11 a wiring schematic 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, which can be regarded as a refinement of Figure 9 、 Figure 10 or Figure 11 the main body and branches in the left region of the functional area Q2 in, and the refinement of the main body and branches in the right region of the functional area Q2 can be regarded as a structure symmetrically arranged with Figure 13 and will not be described in the present disclosure. Please refer to Figure 10 and Figure 13, in an alternative embodiment of the present disclosure, the functional area Q2 includes a bonding pin B0 and a test pin VT-P; the 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. The second branch line FZX2 is arranged on a different layer from the main line ZTX and is electrically connected through a first wire-changing hole K0. The extending directions of the first branch line FZX1 and the second branch line FZX2 are different. In this embodiment, an example is given where the first branch line FZX1 extends in a first direction and the second branch line FZX2 extends in a second direction for illustration.

[0077] This embodiment schematically shows the refined wiring structure of the touch trace X0. Among them, the overall formed by multiple main lines ZTX can be regarded as the main body ZT in the previous embodiment. The overall formed by multiple first branch lines FZX1 can be regarded as the signal line arrangement in a partial area of the first branch FZ1 in the previous embodiment. The overall formed by multiple second branch lines FZX2 can be regarded as the signal line arrangement in a partial area of the second branch FZ2 in the previous embodiment. Along the first direction D1, the end of the main line ZTX away from the display area AA includes a branch point (the position where the first wire-changing hole K0 is located). Two branch lines are led out from this branch point, namely the first branch line FZX1 and the second branch line FZX2. The extending directions of the first branch line FZX1 and the second branch line FZX2 are different. The main line ZTX and the first branch line FZX1 are arranged on the same layer and can be fabricated in the same process. The second branch line FZX2 and the main line ZTX are located in different film layers. At the position of the branch point, the second branch line FZX2 and the main line ZTX are electrically connected through the first wire-changing hole K0, so that the first branch line FZX1 and the second branch line FZX2 extend to the corresponding pins in different film layers respectively, that is, 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. The method of wiring the first branch line FZX1 and the second branch line FZX2 in different layers is beneficial to simplifying the wiring difficulty of the touch trace X0 in the functional area Q2 and improving the production efficiency of the display panel.

[0078] Please continue to refer to Figure 13 , and in combination with Figure 10, in an alternative embodiment of the present 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. 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, and the length of the first branch line FZX1 increases. The first wire-changing hole is located between the main line ZTX and the first branch line FZX1.

[0079] This embodiment shows a solution for setting the length of the main line ZTX in a gradient form. Taking the main line ZTX in the left area of the functional area Q2 as an example for specific description, the arrangement of the main line ZTX in the right area of the functional area Q2 is symmetrically distributed with the arrangement of the main line ZTX in the left area. Along the direction from the first center line of the functional area Q2 to the left edge of the functional area Q2, the length of the main line ZTX shows a gradually decreasing trend. That is to say, the closer to the first center line ZX1 of the functional area Q2, the greater the length of the main line ZTX, and the branch point on the main line ZTX (corresponding to the position where the first wire-changing hole K0 is located) is closer to the lower edge of the functional area Q2. The change trend of the length of the corresponding first branch line FZX1 is opposite to the change trend of the main line ZTX. In this way, 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 arranged in the same film layer without setting 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.

[0080] Figure 14 Shown is a top view of a second shielding portion 92 provided between the first branch line FZX1 and the second branch line FZX2. Please continue to refer to Figure 13 and in combination with Figure 14 , in an alternative embodiment of the present disclosure, along the second direction, the first branch line FZX1 and the second branch line FZX2 overlap; the display panel further includes a second shielding portion 92 located between the first branch line FZX1 and the second branch line FZX2, and the second shielding portion 92 is configured to receive a fixed potential signal.

[0081] When using Figure 13When arranging the main line ZTX, the first branch line FZX1 and the second branch line FZX2 in the shown wiring structure, the first branch line FZX1 and the second branch line FZX2 are respectively wired in different film layers, and there will be an overlapping area between them. When the overlapping first branch line FZX1 and second branch line FZX2 correspond to different touch traces X0, different touch signals transmitted by them may cause signal crosstalk problems and affect touch accuracy. Therefore, the present disclosure introduces a second shielding portion 92 between the first branch line FZX1 and the second straight line. Since the second shielding portion 92 receives a fixed potential signal, it can shield the signals of the first branch line FZX1 and the second branch line FZX2, which is beneficial to avoiding signal crosstalk problems and thus beneficial to improving touch accuracy.

[0082] It should be noted that in the actual manufacturing process of the second shielding portion 92, the second shielding portion 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 portion 92 can be expanded on this basis. For example, please continue to refer to Figure 13 and Figure 14 , in an alternative embodiment of the present disclosure, the second shielding portion 92 extends along the first direction D1 and is arranged along the third direction D3; along the second direction D2, the second shielding portion 92 overlaps with the second branch line FZX2 and is arranged in one-to-one correspondence.

[0083] Figure 14 The shown second shielding portion 92 not only covers the overlapping area of the first branch line FZX1 and the second branch line FZX2, but also further expands the 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 within the projection range of the second shielding portion 92. By setting the second shielding portion 92 with the same structure as the wiring structure of the first branch line FZX1, the structure of the second shielding portion 92 can be simplified. In the overlapping area corresponding to the first branch line FZX1 and the second branch line FZX2, the overlapping areas located in the same column along the first direction D1 correspond to the same second shielding portion 92. In this way, there is no need to set different second shielding portions 92 for different overlapping areas, which is beneficial to reducing the number of second shielding portions 92 actually corresponding to the first branch line FZX1 and the second branch line FZX2. While ensuring that there is a corresponding second shielding portion 92 for shielding in the overlapping area between the first branch line FZX1 and the second branch line FZX2, it is also beneficial to simplify the manufacturing process of the second shielding portion 92.

[0084] Figure 15 Shown is another top view of the second shielding portion 92 provided between the first branch line FZX1 and the second branch line FZX2. Please refer to 14 and Figure 15, in an alternative embodiment of the present disclosure, the second shielding portion 92 includes a first end portion DB1 and a second end portion DB2 that are opposite to each other along the first direction D1. The first end portions DB1 of the second shielding portions 92 are electrically connected, and the second end portions DB2 of the second shielding portions 92 are electrically connected.

[0085] Compared with Figure 14 the illustrated embodiment, please refer to Figure 15 , in this embodiment, the end portions of the second shielding portions 92 are electrically connected. For example, the first end portions DB1 of the second shielding portions 92 are electrically connected to each other, and the second end portions DB2 of the second shielding portions 92 are electrically connected to each other. In this way, the second shielding portions 92 form an integral structure and are at the same potential. When a fixed potential signal is transmitted to the second shielding portion 92, only one signal interface needs to be led out from the overall second shielding portion 92, and there is no need to introduce different signal interfaces for different second shielding portions 92. Therefore, it is beneficial to simplify the connection between the second shielding portion 92 and the fixed potential signal and to simplify the wiring structure of the functional area Q2.

[0086] It should be noted that Figure 14 and Figure 15 show a solution in which the second shielding portion 92 is set to have the same structure as the first branch line FZX1. In some other embodiments of the present disclosure, the second shielding portion 92 can also be set to have the same structure as the second branch line FZX2. For example, please refer to Figure 16 and Figure 17 , Figure 16 shown is another wiring schematic diagram of the main body portion ZT, the first branch portion FZ1, and the second branch portion FZ2 in the touch wiring X0 of the functional area Q2. Figure 17 shown is another top view of the second shielding portion 92 provided between the first branch line FZX1 and the second branch line FZX2. Among them, the second shielding portion 92 extends along the third direction D3 and is arranged along the first direction D1. The length change trend of the second shielding portion 92 is the same as that of the second branch line FZX2. Optionally, along the second direction D2, the projection of the second shielding portion 92 coincides with the projection of the second branch line FZX2, or the projection of the second branch line FZX2 is within the projection range of the second shielding portion 92. At this time, among the multiple overlapping regions of the first branch line FZX1 and the second straight line, the overlapping regions in the same row along the third direction D3 correspond to the same second shielding portion 92, and there is no need to introduce different second shielding portions 92 for different overlapping regions, which is also beneficial to reducing the number of second shielding portions 92 and simplifying the manufacturing process of the display panel. Optionally, the end portions of the second shielding portion 92 along the third direction D3 are electrically connected. In this way, the second shielding portion 92 can also form an integral structure with the same potential, and only one signal interface needs to be introduced to realize the transmission of the fixed potential signal to the second shielding portion 92, which is also beneficial to simplifying the connection between the second shielding portion 92 and the fixed potential signal.

[0087] With appropriate reference Figure 13 and Figure 15 In an alternative embodiment of the present disclosure, the display panel further includes a power supply signal line PX, which is configured to provide a DC power supply signal to the display area AA, and the second shielding portion 92 is electrically connected to the power supply signal line PX.

[0088] Please also refer to Figure 10 The power supply signal line PX mentioned in the present disclosure may be a positive power supply signal line PVDD or a negative power supply signal line PVEE. In actual manufacturing processes, the second shielding portion 92 can be electrically connected to the positive power supply signal line PVDD or the negative power supply signal line PVEE, and a DC power supply signal is provided to the second shielding portion 92 through the positive power supply signal line PVDD or the negative power supply signal line PVEE as the fixed potential signal on the second shielding portion 92, without the need to introduce a new fixed potential signal for the second shielding portion 92. Therefore, it is beneficial to simplify the number of signal terminals in the display panel and the structure of the display panel.

[0089] Figure 18 The following shows a schematic diagram of a film layer in the functional area Q2 of the display panel provided by the present disclosure. Please refer to Figure 18 In an alternative embodiment of the present disclosure, the display panel includes a substrate 00 and a plurality of metal layers disposed on one side of the substrate 00. The 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, please refer to Figure 10 、 Figures 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 portion 92 is located in the first touch metal layer TM1, the first shielding portion 91 is located in the second metal layer M2, and the first signal line S1 is located on the side of the first shielding portion 91 facing the substrate.

[0090] It should be noted that Figure 18The illustrated embodiment only schematically shows 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 the functional area Q2, and does not represent the actual number of film layers in the functional area Q2. In some other embodiments of the present disclosure, there may be other conductive film layers 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. The present disclosure does not specifically limit this. In this embodiment, along the direction from the substrate 00 to the metal layers on the same side of it, 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, and the first metal layer M1 is closest to the substrate, and the second touch metal layer TM2 is farthest from the substrate.

[0091] In the display area AA, please refer to Figure 5 , the driving layer 40 includes a plurality of transistors M0. The gates of the transistors are usually disposed on the aforementioned first metal layer M1, and the sources s and drains d of the transistors are usually disposed on the aforementioned second metal layer M2. The third metal layer M3 can be used to dispose power signal lines PX, for example. The first touch metal layer TM1 and the second touch metal layer TM2 are used to dispose touch electrodes T0 and cross-bridge lines between the touch electrodes. Please refer to Figure 18 . In the wiring area corresponding to the functional area Q2, no transistors are disposed, so these metal layers can be used for wiring. In this embodiment, in the functional area Q2, the main line ZTX and the first branch line FZX1 are located on the second touch metal layer TM2, and the second branch line FZX2 is located on 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, no touch trace X0 is disposed on the first touch metal layer TM1, and the second shielding portion 92 can be disposed on the first touch metal layer TM1, so that the second shielding portion 92 is located between the film layers where the first branch line FZX1 and the second branch line FZX2 are located, to shield the signal between the first branch line FZX1 and the second branch line FZX2 and avoid the problem of 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 dispose power signal lines PX. It should be noted that in this embodiment, when the second branch line FZX2 is disposed on the third metal layer M3, no power signal line PX is disposed in the area of the third metal layer M3 where the second branch line FZX2 is disposed. When the second shielding portion 92 is disposed on the first touch metal layer TM1 in this embodiment, the second shielding portion 92 can be connected to the remaining power signal line PX on the third metal layer M3 through a via hole, so there is no need to introduce a new fixed potential signal, which is beneficial to simplifying the structural design of the display panel.

[0092] For the first signal line S1 in the functional area Q2, wiring can be performed on the first metal layer M1. Of course, wiring can also be performed on the capacitive metal layer MC between the first metal layer M1 and the second metal layer M2. That is to say, the first signal line S1 is located on the side of the second metal layer M2 facing the substrate. At this time, the first shielding portion 91 can be disposed on the second metal layer M2, which is equivalent to disposing the first shielding portion 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 portion 91 can exert a better signal shielding effect, avoiding the influence of the AC signal on the first signal line S1 on the signal on the touch trace X0. Optionally, in the functional area Q2, the second metal layer M2 and the third metal layer M3 are used to set the power signal line PX. At this time, the power signal line PX in the second metal layer M2 can be directly reused as the first shielding portion 91, so that there is no need to introduce a new film layer to set the first shielding portion 91, which is beneficial to simplifying the film layer structure of the display panel.

[0093] Figure 19 The following shows another schematic diagram of the film layer of the functional area Q2 of the display panel provided by the present disclosure. Please refer to Figure 19 , in an optional implementation manner of the present disclosure, the display panel includes a substrate 00 and a plurality of metal layers disposed on one side of the substrate 00. The 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 on the second touch metal layer TM2, the second branch line FZX2 is located on the third metal layer M3, the second shielding portion 92 is located on the fourth metal layer M4, the first shielding portion 91 is located on the second metal layer M2, and the first signal line S1 is located on the side of the first shielding portion 91 facing the substrate.

[0094] Figure 19 The difference between the shown embodiment and Figure 18 is that a fourth metal layer M4 is introduced between the first touch metal layer TM1 and the third metal layer M3, and the same parts will not be described again. Optionally, the fourth metal layer M4 is used to set the power signal line PX. Please refer to Figure 10 , Figure 13 and Figure 19, in this embodiment, the main line ZTX and the first branch line FZX1 are also located in the second touch metal layer TM2, and the second branch line FZX2 is located in the third metal layer M3. In this way, there will be two metal film layers, namely the fourth metal layer M4 and the first touch metal layer TM1, between the film layers where the first branch line FZX1 and the second branch line FZX2 are located. At this time, the second shielding portion 92 can be arranged on the fourth metal layer M4, and the power signal line PX on the fourth metal layer M4 is used as the second shielding portion 92, so that there is no need to introduce a new film layer and signal for the second shielding portion 92 in the display panel, which is beneficial to simplifying the design of the display panel.

[0095] In this embodiment, for the first signal line S1 in the functional area Q2, wiring can be carried out on the first metal layer M1, and of course, wiring can also be carried out on the capacitive metal layer MC between the first metal layer M1 and the second metal layer M2 at the same time. That is to say, the first signal line S1 is located on the side of the second metal layer M2 facing the substrate. At this time, the first shielding portion 91 can be arranged on the second metal layer M2, which is equivalent to arranging the first shielding portion 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 portion 91 can achieve a better signal shielding effect, and avoid the influence of the AC signal on the first signal line S1 on the signal on the touch trace X0. Optionally, in the functional area Q2, the power signal line PX can be distributed on the second metal layer M2, the third metal layer M3, and the fourth metal layer M4 to facilitate reducing the voltage drop on the power signal line PX. At this time, the power signal line PX in the second metal layer M2 can be directly reused as the first shielding portion 91, so that there is no need to introduce a new film layer to arrange the first shielding portion 91, which is beneficial to simplifying the film layer structure of the display panel.

[0096] Figure 20 The figure shows a wiring schematic diagram of the first branch line FZX1 at the junction of the cross-line area KQ and the first area Q11. Figure 21 The figure shows a comparison with Figure 20 a corresponding comparison schematic diagram. Figure 20 The shown embodiment forms a ramp structure XP at the junction of the cross-line area KQ and the first area Q11. Figure 21 The shown embodiment does not form a ramp structure XP at the junction of the cross-line area KQ and the first area Q11. Please refer to Figure 20 , Figure 21 and Figure 10 and Figure 13, in an alternative embodiment of the present disclosure, the display panel includes a substrate 00 and a plurality of metal layers disposed on one side of the substrate 00. The metal layers adjacent to each other 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. The functional area Q2 includes a cross-line area, and the first branch line FZX1 and the second branch line FZX2 overlap in the cross-line area KQ. In the cross-line area KQ, the distance between the insulating layer on the side of the first branch line FZX1 facing the substrate and the substrate is H1; the functional area Q2 includes a first area Q11 adjacent to the cross-line area. In the first area Q11, the distance between the insulating layer on the side of the first branch line FZX1 facing the substrate and the substrate is H2, and H1 < H2. At the junction of the cross-line area and the first area, the insulating layer adjacent to the first branch line FZX1 and located on the side of the first branch line FZX1 facing the substrate includes a ramp structure XP. Along the direction from the cross-line area to the first area, the height of the ramp gradually increases, and the first branch line FZX1 extends to the first area Q11 via the ramp structure XP.

[0097] In the present disclosure, in the functional area Q2, the power signal line PX is distributed in at least two film layers and arranged in a planar manner. For example, the power signal line PX is at least distributed in the second metal layer M2 and the third metal layer M3. The power signal lines PX located in the two metal layers and transmitting the same power signal are electrically connected, which is beneficial to reducing the overall impedance of the power signal line PX and reducing the voltage drop of the power signal transmitted by the power signal line PX. When the second branch line FZX2 is disposed in the film layer where the original power signal line PX is located, for example, when the second branch line FZX2 is disposed in the cross-line area of the third metal layer M3, the planar power signal line PX will no longer be disposed in the cross-line area of the third metal layer M3, but instead a strip-shaped second branch line FZX2 will be used. When an insulating layer is introduced on the side of the third metal layer M3 facing away from the substrate, in the cross-line area, the insulating layer will at least fill between the strip-shaped second branch lines FZX2, while in other areas (the first area, which can be regarded as other areas adjacent to the cross-line area in the functional area Q2), the insulating layer is disposed on the entire surface of the power signal line PX. This makes the overall thickness of the insulating layer in the cross-line area smaller than the thickness of the insulating layer in other areas. For example, please refer to Figure 20 , a height step difference appears at the junction of the cross-line area KQ and the first area Q11. Since the film layer where the first branch line FZX1 is located is above the insulating layer, when the first branch line FZX1 passes through the cross-line area and further extends to the first area, the position of the step difference may cause the first branch line FZX1 to break. For this reason, please refer to Figure 20, in the present disclosure, a ramp structure XP is provided at the position of the step difference, and the height of the ramp gradually increases in the direction from the crossover area to the first area, so as to realize a smooth transition of the first branch line FZX1 from the crossover area to the first area, effectively avoiding the problem of wire breakage.

[0098] Please continue to refer to Figure 20 , in an alternative embodiment of the present disclosure, the angle between the inclined surface and the bottom surface of the ramp structure XP is α, and α ≤ 50°. It should be noted that the smaller the angle between the inclined surface and the bottom surface of the ramp structure XP, the gentler the ramp, and the more capable of avoiding the problem of wire breakage of the first branch line FZX1. The present disclosure sets the angle between the inclined surface and the bottom surface in the ramp structure XP to be less than or equal to 50°, which is more conducive to the smooth transition of the first branch line FZX1 to the first area, conducive to improving the reliable coverage of the first branch line FZX1 at the junction of the crossover area and the first area, and avoiding the problem of wire breakage.

[0099] When forming the ramp structure XP at the junction of the crossover area and the first area, the upper surface of the inclined surface of the ramp structure XP can be a flat structure. In some other embodiments of the present disclosure, the upper surface of the inclined surface of the ramp structure XP can also be set as a non-flat structure. For example, please refer to Figure 22 and Figure 23 , Figure 22 shows a top view of the ramp structure XP and the first branch line FZX1, Figure 23 as shown in Figure 22 a CC-direction cross-sectional view corresponding to the structure. In an alternative embodiment of the present disclosure, the inclined surface of the ramp structure XP includes a plurality of recessed portions AX extending from the bottom of the slope to the top. Along the second direction, the first branch line FZX1 overlaps with the recessed portions AX; along the third direction D3, the width of the first branch line FZX1 is greater than the width of the recessed portions AX.

[0100] Please continue to refer to Figure 22 and Figure 23 , in this embodiment, recessed portions AX are introduced on the inclined surface of the ramp structure XP. The recessed portions AX can be regarded as structures recessed from the inclined surface to the bottom surface. The recessed portions AX are strip-shaped structures extending from the top to the bottom of the ramp structure XP, and the width of the ramp structure XP is smaller than the line width of the first branch line FZX1. When the first branch line FZX1 extends on the ramp structure XP, the first branch line FZX1 covers at least two recessed portions AX, and at least a part of the first branch line FZX1 will be filled in the recessed portions AX. In this way, it is more conducive to improving the coverage of the first branch line FZX1 on the ramp structure XP and more conducive to avoiding the problem of wire breakage of the first branch line FZX1.

[0101] Figure 22A scheme of forming a row of recesses AX on the slope structure XP is shown. Each recess AX extends from the top of the slope to the bottom of the slope. In some other embodiments of the present disclosure, two rows or more than two rows of recesses AX can also be formed on the slope. For example, please refer to Figure 24 , Figure 24 Another top view of the slope structure XP and the first branch line FZX1 is shown. Compared with the embodiment shown in Figure 22 , Figure 24 the length of the recess AX in Figure 20 is shorter, but the overall extending direction of the recess AX is the same as that of the recess AX in

[0102] When forming the first branch line FZX1 on the inclined surface of the slope structure XP, the first branch line FZX1 can also fill into the recess AX to improve the coverage of the first branch line FZX1 on the inclined surface. Figure 25 A schematic structural diagram of a display device 200 provided by an embodiment of the present disclosure is shown. Please refer to Figure 25 , and the display device 200 includes the display panel 100 in any of the above embodiments. The display device 200 provided by the embodiments of the present disclosure can be any electronic device with a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, an e-reader, or a television. The display device 200 provided by the embodiments of the present disclosure has the beneficial effects of the display panel provided by the embodiments of the present disclosure. For specific descriptions of the display panel, reference can be made to the above embodiments, and details are not repeated herein.

[0103] It can be understood that Figure 25 only a rounded rectangle structure is taken as an example to illustrate a shape of the display device 200. In some other embodiments of the present disclosure, the display device 200 can also be embodied as a circular shape, an oval shape, or any other feasible shape, and the present disclosure does not specifically limit this.

[0104] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0105] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will 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 arranged outside the display area, the non-display area includes a step area and a non-step area, the step area includes a wiring area and a functional area arranged along a first direction, and the functional area is provided with binding pins; A touch electrode and a touch signal line electrically connected to the touch electrode, wherein the touch signal line extends from the routing area to the functional area and is electrically connected to the binding pin, and a portion of the touch signal line located in the functional area is a touch routing line; A first signal line, located in the functional area, configured to transmit an AC signal; Along the second direction, the first signal line and the touch line at least partially overlap, the overlapping area of ​​the first signal line and the touch line 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 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, which is configured to provide a DC power signal to the display area. In the functional area, the power signal line is reused as the first shielding portion.

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 is adjacent to the power signal line and is located on a side of the power signal line facing the substrate; A plurality of through holes are disposed on the power signal line. Along the second direction, the through holes penetrate the power signal line, and the through holes 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 wiring includes a main body and a first branch, the main body is electrically connected to the touch signal line, and two ends of the first branch are electrically connected to the main body and the binding pin respectively; The display area includes a data line, the routing 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 portion does not overlap with the second fan-out line.

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, and the third direction 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; and an overlapping area between 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 line also includes a second branch portion located in the functional area, and two ends of the second branch portion are electrically connected to the main body and the test pin respectively; along the second direction, the second branch portion does not overlap with the second fan-out line.

9. The display panel according to claim 8, characterized in that: The non-step area includes a gate driving circuit, the step area 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, and 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, and 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 and the second branch portion at least partially overlap, and the overlapping area between the drive signal fan-out line and the second branch portion 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, wherein the test pin is located on a side of the binding pin away from the first branch portion; The touch control wiring further includes an extension portion located in the functional area, and two ends of the extension portion are electrically connected to the binding pin and the test pin respectively.

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

12. The display panel according to claim 1, characterized in that: The functional area further includes a test pin; the touch line includes 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 binding 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 in the same layer, the second branch line and the main line are arranged in different layers and are electrically connected through a first line-changing hole, and 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 a third direction respectively, 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, from the first center line to the edge of the display panel, the length of the main line decreases and the length of the first branch line increases. The first line change 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 line and the second branch line overlap; the display panel further includes a second shielding portion located between the first branch line and the second branch line, and the second shielding portion is configured to receive a fixed potential signal.

15. The display panel according to claim 14, characterized in that: The second shielding portions extend along the first direction and are arranged along the third direction; along the second direction, the second shielding portions overlap with the second branches and are arranged in a one-to-one correspondence.

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

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

18. The display panel according to claim 14, characterized in that: The display panel comprises a substrate and a plurality of metal layers arranged on one side of the substrate, wherein the metal layers adjacent to each other along the second direction are isolated 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 comprises a substrate and a plurality of metal layers arranged on one side of the substrate, wherein the metal layers adjacent to each other along the second direction are isolated 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 comprises a substrate and a plurality of metal layers arranged on one side of the substrate, wherein the metal layers adjacent to each other along the second direction are isolated 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 line is located in the second touch metal layer, and the second branch line is located in the third metal layer; The functional area includes a cross-line area, the first branch line and the second branch line overlap in the cross-line area, and in the cross-line 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 cross-line area, and in the first area, the distance between the insulating layer on the side of the first branch line facing the substrate and the substrate is H2, H1<H2; At the junction of the cross-line area and the first area, the insulating layer adjacent to the first branch line and located on the side of the first branch line facing the substrate includes a slope structure, and the height of the slope gradually increases along the direction from the cross-line area to the first area, and the first branch line extends to the first area via the slope 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, and α≤50°.

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

23. The display panel according to claim 1, characterized in that: The step area further includes a bending area, and the bending area is located between the routing area and the functional area. The functional area is bent to a side of the display panel facing away from the light emitting surface through the bending area.

24. A display device, characterized in that: The display panel comprises any one of claims 1 to 23.

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