Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a display substrate and a touch control function layer arranged on the display substrate, the touch control function layer comprises a touch control electrode and a touch control signal line connected with the touch control electrode, the touch control electrode is located in a display area of the display panel, and in the display area, the touch control signal line is connected with the touch control electrode. The touch control electrode close to the non-display area forms an inward contraction area, the inward contraction area is provided with a part of line segment of at least one touch control signal line, and the touch control function layer further comprises a first conducting layer and a second conducting layer located on the side, away from the display substrate, of the first conducting layer. At least part of the touch signal lines located in the inward contraction area comprise a first lead and a second lead which are electrically connected, the first lead is located on the first conductive layer, and the second lead is located on the second conductive layer, so that a narrow frame is achieved while the touch function is achieved.

Description

Technical Field

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

[0002] At present, the more mature touch technologies include capacitive touch, infrared touch, resistive touch, etc. Among them, capacitive touch has become the mainstream form of small-size organic light-emitting diode (OLED) display products due to its simple structure, convenient process and excellent performance. In order to realize the touch function, the touch electrodes in the display area need to be connected to the touch driver chip in the non-display area through touch leads, which requires a large number of touch leads to be set in the non-display area, which is not conducive to achieving a narrow frame. Summary of the invention

[0003] The present application provides a display panel and a display device to achieve a narrow frame while satisfying a touch function.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] An embodiment of the present application provides a display panel, which includes a display area and a non-display area located at least on one side of the display area; the display panel also includes:

[0006] Display substrate;

[0007] A touch function layer is arranged on the display substrate, the touch function layer includes touch electrodes and touch signal lines connected to the touch electrodes, the touch electrodes are located in the display area, and a retracted area is formed near the touch electrodes in the non-display area in the display area, and the retracted area is provided with a partial line segment of at least one touch signal line;

[0008] Among them, the touch function layer also includes a first conductive layer and a second conductive layer located on a side of the first conductive layer away from the display substrate, and at least part of the touch signal line located in the retracted area includes an electrically connected first lead and a second lead, the first lead is located in the first conductive layer, and the second lead is located in the second conductive layer.

[0009] In the display panel provided in the embodiment of the present application, the orthographic projection of the first lead on the display substrate at least partially overlaps with the orthographic projection of the second lead on the display substrate.

[0010] In the display panel provided in the embodiment of the present application, in the thickness direction of the display panel, the first lead line and the second lead line are arranged to completely overlap.

[0011] In the display panel provided in the embodiment of the present application, the touch electrodes include first touch electrodes arranged at intervals along a first direction, and second touch electrodes arranged at intervals along a second direction, the first touch electrodes are insulated from the second touch electrodes, and the first direction and the second direction are intersecting;

[0012] The touch signal lines include first-type touch signal lines connected to the first touch electrodes, and second-type touch signal lines connected to the second touch electrodes;

[0013] Wherein, at least part of the first-type touch signal lines and / or at least part of the second-type touch signal lines are located in the retracted area.

[0014] In the display panel provided in the embodiment of the present application, the first touch electrode and the second touch electrode are both located in the second conductive layer, the touch function layer also includes a bridging electrode arranged in the same layer as the first lead, and one of the first touch electrode and the second touch electrode is bridged by the bridging electrode.

[0015] In the display panel provided in the embodiment of the present application, when part of the first-type touch signal lines and part of the second-type touch signal lines are located in the retracted area, the second-type touch signal lines are located on a side of the first-type touch signal lines away from the second touch electrodes;

[0016] The touch function layer further includes a first protection electrode and a second protection electrode. The second touch electrode is isolated from the first type of touch signal line by the first protection electrode, and the first type of touch signal line is isolated from the second type of touch signal line by the second protection electrode.

[0017] In the display panel provided in the embodiment of the present application, the first touch electrodes are touch driving electrodes, the second touch electrodes are touch sensing electrodes, and in the retracted area, the number of the first type of touch signal lines is greater than the number of the second type of touch signal lines.

[0018] In the display panel provided in the embodiment of the present application, the display panel further comprises a touch driving chip arranged in the non-display area, and the touch electrodes are connected to the touch driving chip through the corresponding touch signal lines;

[0019] Among the first-type touch signal lines located in the retracted area, the second leads include first-type second leads and second-type second leads, the width of the first-type second leads is greater than the width of the second-type second leads, and the distance between the first touch electrode connected to the first-type second leads and the touch driver chip is greater than the distance between the first touch electrode connected to the second-type second leads and the touch driver chip.

[0020] In the display panel provided in the embodiment of the present application, part of the second-type touch signal lines are located in the non-display area, and the width of the second-type touch signal lines located in the non-display area is smaller than the width of the second-type touch signal lines located in the retracted area.

[0021] In the display panel provided in the embodiment of the present application, the first type of second lead includes a first sub-line and a second sub-line, the second type of second lead includes the first sub-line or the second sub-line, the first sub-line and the second sub-line are surrounded by a grid-like routing, and the touch electrode includes a metal grid structure composed of a plurality of the grid-like routings.

[0022] In the display panel provided by the embodiment of the present application, in the arrangement direction of the second lead lines, the first sub-lines and the second sub-lines are arranged alternately.

[0023] In the display panel provided in the embodiment of the present application, the display panel also includes a plurality of spaced-apart sub-pixels, the sub-pixels are located in a partial area enclosed by the first sub-line and the second sub-line, and the shapes of the first sub-line and the second sub-line are adapted to the shapes of the corresponding sub-pixels.

[0024] In the display panel provided in the embodiment of the present application, the plurality of sub-pixels are arranged in sub-pixel rows, the plurality of sub-pixels are arranged in sub-pixel columns, and the extension direction of the first sub-line and the second sub-line is the same as the direction of the sub-pixel rows or the sub-pixel columns.

[0025] An embodiment of the present application further provides a display device, which includes the display panel described in one of the aforementioned embodiments.

[0026] The beneficial effects of the present application are as follows: in the display panel and the display device provided by the present application, the display panel includes a display substrate and a touch function layer arranged on the display substrate, the touch function layer includes touch electrodes and touch signal lines connected to the touch electrodes, the touch electrodes are located in a display area of ​​the display panel, and in the display area, the touch electrodes close to the non-display area form a retracted area, and the retracted area is provided with at least one partial line segment of the touch signal line, the touch function layer also includes a first conductive layer and a second conductive layer located on a side of the first conductive layer away from the display substrate, and at least one touch signal line located in the retracted area Part of the touch signal lines includes an electrically connected first lead and a second lead, the first lead is located in the first conductive layer, and the second lead is located in the second conductive layer; in this way, by setting at least part of the touch signal lines in the display area, the non-display area occupied by the touch signal lines can be reduced, thereby reducing the border area and achieving a narrow border; moreover, at least part of the touch signal lines located in the retracted area are formed by connecting the first lead and the second lead located in different layers in parallel, so that more touch signal lines can be set in a limited display area while meeting the electrical requirements of the touch signal lines, thereby further reducing the border area and achieving a narrower border. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of a planar structure of a display panel provided in an embodiment of the present application.

[0029] Figure 2 A schematic diagram of a partial cross-sectional structure of a display panel provided in an embodiment of the present application.

[0030] Figure 3 for Figure 1 Detailed structural diagram of M in the figure.

[0031] Figure 4 for Figure 3 Schematic diagram of the arrangement of the touch signal lines in the second conductive layer.

[0032] Figure 5 for Figure 3 Schematic diagram of the arrangement of touch signal lines in the first conductive layer.

[0033] Figure 6 for Figure 3 Schematic diagram of the local detailed structure of the touch electrode. DETAILED DESCRIPTION

[0034] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in the present application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and regions is exaggerated for clear understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

[0035] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of a planar structure of a display panel provided in an embodiment of the present application, Figure 2 A schematic diagram of a partial cross-sectional structure of a display panel provided in an embodiment of the present application, Figure 3 for Figure 1 Detailed structural diagram of M in the figure. Figure 4 for Figure 3 The schematic diagram of the arrangement of the touch signal line in the second conductive layer, Figure 5 for Figure 3 The schematic diagram of the arrangement of the touch signal line in the first conductive layer, Figure 6 for Figure 3 Schematic diagram of the local details of the touch electrode. Figure 1 and Figure 3 The display panel 100 includes a display area AA and a non-display area NA located at least on one side of the display area AA, for example, the non-display area NA surrounds the display area AA. The display area AA is the display effective area of ​​the display panel 100, and the display effective area can display images, while the non-display area NA does not have the function of displaying images.

[0036] The display panel 100 further includes a display substrate 10 and a touch function layer 20 disposed on the display substrate 10. The touch function layer 20 includes a touch electrode 30 and a touch signal line 40 connected to the touch electrode 30. The touch electrode 30 is located in the display area AA. In the display area AA, a part of the touch electrode 30 is retracted relative to another part of the touch electrode 30 to form a retracted area SA, that is, the touch electrode 30 close to the non-display area NA is formed with a retracted area SA, and the opening of the retracted area SA faces the non-display area NA. The retracted area SA is provided with at least one partial line segment of the touch signal line 40, and the touch signal line 40 is located on the side of the touch electrode 30 close to the non-display area NA. In this way, by setting at least part of the touch signal line 40 in the display area AA, the area of ​​the non-display area NA occupied by the touch signal line 40 can be reduced, thereby reducing the frame area and achieving a narrow frame.

[0037] The display panel 100 further includes a touch driving chip 50 disposed in the non-display area NA. The touch electrodes 30 are connected to the touch driving chip 50 through the corresponding touch signal lines 40. The touch electrodes 30 include first touch electrodes 31 arranged at intervals along a first direction X, and second touch electrodes 32 arranged at intervals along a second direction Y, the first touch electrodes 31 are insulated from the second touch electrodes 32, the first direction X and the second direction Y are intersected, and the angle between the first direction X and the second direction Y is greater than 0 degrees and less than or equal to 90 degrees, for example, the first direction X is a horizontal direction, and the second direction Y is a vertical direction, and the first direction X is perpendicular to the second direction Y.

[0038] Optionally, the non-display area NA includes a first sub-area and a second sub-area opposite to each other, and a third sub-area and a fourth sub-area connecting the first sub-area and the second sub-area. The first sub-area and the second sub-area are located at two ends of the second touch electrode 32, and the third sub-area and the fourth sub-area are located at two ends of the first touch electrode 31. The touch driving chip 50 is located in the fourth sub-area.

[0039] The first touch electrode 31 includes a plurality of first electrode blocks 311 connected to each other in the second direction Y, and the second touch electrode 32 includes a plurality of second electrode blocks 321 connected to each other in the first direction X. Two adjacent first electrode blocks 311 are connected via a first connecting portion, and two adjacent second electrode blocks 321 are connected via a second connecting portion, and the second connecting portion is insulated and crossed with the first connecting portion, that is, the second connecting portion and the first connecting portion are located at different layers.

[0040] It should be noted that the number of the first touch electrodes 31 and the second touch electrodes 32 in the present application is not limited to Figure 1 The number of examples, Figure 1 This is only an example. The present application may further include more or less first touch electrodes 31 and second touch electrodes 32. Accordingly, the number of first electrode blocks 311 included in each first touch electrode 31 and the number of second electrode blocks 321 included in each second touch electrode 32 are also not limited to Figure 1 The number of examples.

[0041] In some embodiments, the display panel 100 adopts mutual capacitive touch, one of the first touch electrode 31 and the second touch electrode 32 is a touch driving electrode, and the other is a touch sensing electrode, for example, the first touch electrode 31 is a touch driving electrode, and the second touch electrode 32 is a touch sensing electrode. A capacitor is formed between the adjacent first electrode blocks 311 and second electrode blocks 321, and the touch driving chip 50 provides a touch driving signal to the touch driving electrode, and receives a sensing signal returned by the touch sensing electrode, and determines the position of the capacitor where the capacitance value changes according to the sensing signal, thereby determining the touch position.

[0042] In some other embodiments, the display panel 100 may also adopt self-capacitive touch, for example, the first electrode block 311 and the second electrode block 321 respectively form a capacitor with the ground, and the touch driver chip 50 respectively detects the detection signals sent back by the first touch electrode 31 and the second touch electrode 32 to determine the change in the capacitance of each electrode to the ground before and after the touch, thereby determining the touch position.

[0043] Reference Figure 2 The touch function layer 20 is arranged on the light emitting side of the display panel 100, and the light emitting side of the display panel 100 is also the side of the display panel 100 used for displaying pictures. The display panel 100 includes a display area AA and an encapsulation layer 12 for encapsulating the display layer 11. The touch function layer 20 can be directly made on the encapsulation layer 12 of the display panel 100 using DOT (Direct On cell Touch, the touch layer is directly made on the display panel 100) technology to reduce the thickness of the display panel 100.

[0044] In some embodiments, the display layer 11 may include a substrate and a thin film transistor layer disposed on the substrate, wherein the thin film transistor layer is located on a side of the substrate close to the encapsulation layer 12. The substrate may be a substrate formed of polyimide. When the substrate is a flexible substrate, the substrate may be formed of multiple sub-substrates with the same material such as polyimide, and adjacent sub-substrates are bonded by bonding sub-layers.

[0045] In some embodiments, the thin film transistor layer includes a thin film transistor, which includes a semiconductor located on a substrate, and the semiconductor can be formed of polysilicon or a metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and a source region and a drain region formed on both sides of the channel region. The thin film transistor layer also includes a first gate insulating layer, and the first gate insulating layer covers the semiconductor.

[0046] The thin film transistor also includes a first gate formed on the first gate insulating layer, the first gate overlapping the channel region. The first gate can be formed as a plurality of layers or a single layer including a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance.

[0047] The thin film transistor layer also includes a second gate insulating layer, which covers the first gate. The thin film transistor also includes a second gate located on the second gate insulating layer, the second gate overlaps the first gate, and the second gate can be formed as a plurality of layers or a single layer including a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer also includes an interlayer dielectric layer formed on the second gate.

[0048] The interlayer dielectric layer and the first gate insulating layer and the second gate insulating layer include a source contact hole and a drain contact hole, and the source region and the drain region are exposed through the source contact hole and the drain contact hole, respectively.

[0049] The thin film transistor also includes a source and a drain arranged in the same layer, both formed on the interlayer dielectric layer, the source electrode is connected to the source region through the source contact hole, and the drain electrode is connected to the drain region through the drain contact hole. Among them, the source and the drain can be multiple layers or a single layer formed by low-resistance materials such as Al, Ti, Mo, Cu, Ni, or their alloys, or materials with high corrosion resistance. For example, the source and the drain can be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti or Mo / Al / Mo or other single or multilayer structures.

[0050] In some embodiments, the display layer 11 further includes a planar layer located between the thin film transistor layer and the light emitting layer, and the planar layer covers the source electrode and the drain electrode.

[0051] In some embodiments, the display layer 11 further includes an anode layer located on a side of the planar layer away from the thin film transistor layer, the anode layer includes a plurality of anodes, and the anodes are arranged one by one corresponding to the light-emitting pixel units on the display panel 100. Each anode is electrically connected to the thin film transistor, respectively. The planar layer includes an anode contact hole, and the anode contacts the source or drain of the thin film transistor through the anode contact hole.

[0052] In some embodiments, the display layer 11 further includes a pixel definition layer, which is disposed on a side of the planar layer away from the thin film transistor layer, and the pixel definition layer includes a pixel definition portion and an opening between the pixel definition portions. The display layer 11 further includes a light-emitting layer, which includes a plurality of light-emitting pixel units. The light-emitting pixel units are located in the openings. Each of the light-emitting pixel units is a sub-pixel. The openings expose a portion of the anode, and the pixel definition portion covers the edge of the anode. The light-emitting pixel units may include a red light-emitting pixel unit, a green light-emitting pixel unit, and a blue light-emitting pixel unit.

[0053] In some embodiments, the display layer 11 also includes a cathode layer, and the cathode layer covers the light-emitting layer. In the direction from the anode to the cathode layer, the light-emitting layer includes a hole-type organic layer, a light-emitting material layer, and an electronic organic layer stacked in sequence. The hole-type organic layer may include a hole injection layer and a hole transport layer, the hole injection layer is in direct contact with the anode, and the hole transport layer is located between the hole injection layer and the light-emitting material layer. The hole-type organic layer may also include an electron blocking layer located between the hole transport layer and the light-emitting material layer. The electronic organic layer may include an electron injection layer and an electron transport layer, the electron injection layer is in direct contact with the cathode layer, and the electron transport layer is located between the electron injection layer and the light-emitting material layer. The electronic organic layer may also include a hole blocking layer located between the electron transport layer and the light-emitting layer.

[0054] In some embodiments, the encapsulation layer 12 is located on a side of the cathode layer away from the light-emitting layer. The encapsulation layer 12 is formed by alternating a plurality of inorganic film layers and organic film layers. For example, in the thickness direction of the display panel 100, the encapsulation layer 12 includes a first inorganic encapsulation sublayer, a first organic encapsulation sublayer, and a second inorganic encapsulation sublayer.

[0055] In some embodiments, continue to refer to Figure 2 , the touch function layer 20 is located on the side of the encapsulation layer 12 away from the light emitting layer. The touch function layer 20 further includes a first conductive layer 21 and a second conductive layer 22 located on the side of the first conductive layer 21 away from the display substrate 10, and at least part of the touch signal line 40 located in the retracted area SA includes a first lead 41 and a second lead 42 electrically connected, the first lead 41 is located in the first conductive layer 21, and the second lead 42 is located in the second conductive layer 22. In this way, at least part of the touch signal line 40 located in the retracted area SA is formed by connecting the first lead 41 and the second lead 42 located in different layers in parallel, so as to reduce the line width of the touch signal line 40 while meeting the electrical requirements of the touch signal line 40, and more touch signal lines 40 can be arranged in the limited display area AA, thereby further reducing the frame area and achieving a narrower frame.

[0056] Optionally, the touch electrode 30 is located in the second conductive layer 22, that is, the first touch electrode 31 and the second touch electrode 32 are both located in the second conductive layer 22, and the touch function layer 20 further includes a bridging electrode 312 provided in the same layer as the first lead 41, and one of the first touch electrode 31 and the second touch electrode 32 is bridged by the bridging electrode 312. This embodiment takes the example of the first touch electrode 31 being bridged by the bridging electrode 312, that is, the bridging electrode 312 is a first connecting portion connecting two adjacent first electrode blocks 311, and the two adjacent first electrode blocks 311 are bridged by the bridging electrode 312 to achieve communication. At this time, the first connecting portion is located in the first conductive layer 21, and the second connecting portion is located in the second conductive layer 22.

[0057] Optionally, the first conductive layer 21 and the second conductive layer 22 can be made of transparent materials, such as indium tin oxide, or can be made of metal materials, such as at least one of titanium, aluminum, silver, copper, etc., or a three-layer metal structure of titanium / aluminum / titanium.

[0058] Continue to refer to Figure 2 The touch function layer 20 further includes a first interlayer insulating layer 23, and the first interlayer insulating layer 23 is located between the first conductive layer 21 and the second conductive layer 22. The first interlayer insulating layer 23 is provided with a first via hole and a second via hole. The first via hole exposes a portion of the bridge electrode 312, and the adjacent first electrode block 311 is connected to the bridge electrode 312 through the first via hole. The second via hole exposes a portion of the first lead 41, and the second lead 42 is connected to the first lead 41 through the second via hole.

[0059] In some embodiments, the touch function layer 20 further includes a second interlayer insulating layer 24 and a protective layer 25, wherein the second interlayer insulating layer 24 is located on a side of the first conductive layer 21 close to the display panel 100, for example, the second interlayer insulating layer 24 is located between the first conductive layer 21 and the encapsulation layer 12. The protective layer 25 is located on a side of the second conductive layer 22 away from the first conductive layer 21, and the protective layer 25 covers the second conductive layer 22 and the first interlayer insulating layer 23.

[0060] Optionally, the first interlayer insulating layer 23 and the second interlayer insulating layer 24 are made of the same material, such as inorganic materials such as silicon oxide and silicon nitride, and the protective layer 25 is an insulating dry film, such as PAS (polyalumirlillm sulfate), which can protect the touch electrode 30 from oxidation and falling off.

[0061] In one embodiment, the orthographic projection of the first lead 41 on the display substrate 10 is at least partially overlapped with the orthographic projection of the second lead 42 on the display substrate 10. For example, in the thickness direction of the display panel 100, the first lead 41 and the second lead 42 are completely overlapped, that is, the shape and size of the first lead 41 and the second lead 42 are completely the same, and the first lead 41 and the second lead 42 are completely overlapped in the thickness direction of the display panel 100, so that the area of ​​the display area AA occupied by each touch signal line 40 can be further reduced, and more touch signal lines 40 can be arranged in the display area AA, thereby achieving a narrower frame.

[0062] Reference Figure 3 The touch signal lines 40 include first-type touch signal lines 40-1 connected to the first touch electrodes 31, and second-type touch signal lines 40-2 connected to the second touch electrodes 32. The first-type touch signal lines 40-1 are connected between the first touch electrodes 31 and the touch driving chip 50, and the second-type touch signal lines 40-2 are connected between the second touch electrodes 32 and the touch driving chip 50. At least part of the first-type touch signal lines 40-1 and / or at least part of the second-type touch signal lines 40-2 are located in the shrinking area SA.

[0063] In the present application, the touch signal line 40 being located in the retracted area SA means that part of the line segments of the touch signal line 40 are located in the retracted area SA, and the part of the line segments of the touch signal line 40 being located in the retracted area SA means that at least part of the main body of a single touch signal line 40 is located in the retracted area SA. Each of the touch signal lines 40 includes a first end connected to the touch electrode 30, a second end connected to the touch driving chip 50, and a main body connected between the first end and the second end. The length of the main body is greater than the length of the first end and the second end, and the extension direction of the main body is different from that of the first end and the second end. For example, the first end extends along the first direction X, the second end extends along the second direction Y, and the main body first extends along the second direction Y and then extends along the first direction X. Generally speaking, the first end portion and the corresponding touch electrode 30 are both located in the display area AA, and the main body portion is located in the non-display area NA. The main body portion being located in the non-display area NA will cause the frame to become larger, which is not conducive to achieving a narrow frame. In the present application, a retracted area SA is set to place part of the main body of the touch signal line 40, so that the space in the non-display area AA originally occupied by the main body portion can be saved, thereby reducing the area of ​​the non-display area and achieving a narrow frame.

[0064] For example, taking the case where some line segments of the second-type touch signal line 40-2 are located in the retracted area SA, each of the second-type touch signal lines 40-2 includes a first end, a main body and a second end, the first end is connected to the second touch electrode 32, the second end is connected to the touch driving chip 50, the main body connects the first end and the second end, the main body can be divided into two parts, the first part is located at the end of the second touch electrode 32, the second part is located at the end of the first touch electrode 31, the first part extends along the second direction Y, and the second part extends along the first direction X.

[0065] Continue to refer to Figure 3 In this embodiment, a part of the first-type touch signal lines 40-1 and a part of the second-type touch signal lines 40-2 are located in the retracted area SA as an example. In the retracted area SA, the second-type touch signal lines 40-2 are located on a side of the first-type touch signal lines 40-1 away from the second touch electrodes 32. The first-type touch signal lines 40-1 are insulated from the second touch electrodes 32, and the first-type touch signal lines 40-1 are also insulated from the second-type touch signal lines 40-2.

[0066] Optionally, the touch function layer 20 further includes a first protective electrode 61 and a second protective electrode 62. The second touch electrode 32 is isolated from the first touch signal line 40-1 by the first protective electrode 61, and the first touch signal line 40-1 is isolated from the second touch signal line 40-2 by the second protective electrode 62. The first protective electrode 61 is used to shield the second touch electrode 32 and the first touch signal line 40-1 to prevent the first touch signal line 40 from interfering with the second touch electrode 32. The first protective electrode 61 is insulated from the second touch electrode 32 and the first touch signal line 40-1. The second protective electrode 62 is used to shield the first touch signal line 40-1 and the second touch signal line 40-2 to prevent the first touch signal line 40 and the second touch signal line 40-2 from interfering with each other. The second protective electrode 62 is insulated from the first touch signal line 40-1 and the second touch signal line 40-2.

[0067] In one embodiment, in the retracted area SA, the number of the first type of touch signal lines 40-1 is greater than the number of the second type of touch signal lines 40-2. It can be understood that the first type of touch signal lines 40-1 are used to connect the first touch electrode 31 and the touch driver chip 50, and all of the first type of touch signal lines 40-1 are located between the first touch electrode 31 and the touch driver chip 50. By setting as many of the first type of touch signal lines 40-1 as possible in the retracted area SA, the number of the second type of touch signal lines 40-2 set in the retracted area SA can be increased, thereby reducing the area of ​​the fourth sub-area occupied by the second type of touch signal lines 40-2, and the fourth sub-area is the lower frame of the display panel 100. Reducing the area of ​​the fourth sub-area can most effectively achieve an extremely narrow frame.

[0068] In one embodiment, referring to Figure 3 and Figure 4 , among the first-type touch signal lines 40-1 located in the retracted area SA, the width of some of the first-type touch signal lines 40-1 is greater than the width of another part of the first-type touch signal lines 40-1. Taking the second lead 42 of the first-type touch signal line 40-1 as an example, the second lead 42 includes a first-type second lead 42-1 and a second-type second lead 42-2. The width of the first-type second lead 42-1 is greater than the width of the second-type second lead 42-2. The distance between the first touch electrode 31 connected to the first-type second lead 42-1 and the touch driving chip 50 is greater than the distance between the first touch electrode 31 connected to the second-type second lead 42-2 and the touch driving chip 50. That is, the length of the first-type second lead 42-1 with a larger width is also larger. By making the width of the first-type second lead 42-1 larger than the width of the second-type second lead 42-2, the impedances on the first-type second lead 42-1 and the second-type second lead 42-2 can be made consistent.

[0069] Since the first lead 41 of the first type touch signal line 40-1 and the second lead 42 are completely the same in size and shape, and completely overlap in the thickness direction of the display panel 100, the design of the line width of the first lead 41 is the same as the design of the line width of the second lead 42, and the line width of the second lead 42 can represent the line width of the corresponding first lead 41, and can also represent the line width of the corresponding first type touch signal line 40-1.

[0070] Specifically, refer to Figure 5The first lead 41 includes a first-type first lead 41-1 and a second-type first lead 41-2, the width of the first-type first lead 41-1 is greater than the width of the second-type first lead 41-2, the distance between the first touch electrode 31 connected to the first-type first lead 41-1 and the touch driver chip 50 is greater than the distance between the first touch electrode 31 connected to the second-type first lead 41-2 and the touch driver chip 50, that is, the length of the first-type first lead 41-1 with a larger width is also larger, and by making the width of the first-type first lead 41-1 greater than the width of the second-type first lead 41-2, the impedances on the first-type first lead 41-1 and the second-type first lead 41-2 can be made consistent.

[0071] In one embodiment, continue to refer to Figure 3 and Figure 4 , Figure 5 , part of the second lead 42 includes the first sub-line 421 and the second sub-line 422, and the first sub-line 421 and the second sub-line 422 are enclosed in a grid-like arrangement, and another part of the second lead 42 includes the first sub-line 421 or the second sub-line 422, that is, part of the second lead 42 is composed of the first sub-line 421 and the second sub-line 422, and another part of the second lead 42 is composed of one of the first sub-line 421 and the second sub-line 422, so that the second lead 42 composed of the first sub-line 421 and the second sub-line 422 is fully enclosed, and the second lead 42 composed of one of the first sub-line 421 and the second sub-line 422 is semi-enclosed. Thus, the width of the second lead 42 formed by the first sub-wire 421 and the second sub-wire 422 is greater than the width of the second lead 42 formed by one of the first sub-wire 421 and the second sub-wire 422. In other words, the second lead 42 formed by the first sub-wire 421 and the second sub-wire 422 is the first type of second lead 42-1, and the second lead 42 formed by one of the first sub-wire 421 and the second sub-wire 422 is the second type of second lead 42-2. The first type of second lead 42-1 includes the first sub-wire 421 and the second sub-wire 422, and the second type of second lead 42-2 includes the first sub-wire 421 or the second sub-wire 422.

[0072] Combined with reference Figure 3 and Figure 6 The display panel 100 further includes a plurality of spaced-apart sub-pixels SP, wherein the sub-pixels SP are located in a partial area enclosed by the first sub-line 421 and the second sub-line 422, and the shapes of the first sub-line 421 and the second sub-line 422 match the shapes of the corresponding sub-pixels SP.

[0073] A plurality of the sub-pixels SP are arranged in a sub-pixel row, a plurality of the sub-pixels SP are arranged in a sub-pixel column, and the extending direction of the first sub-line 421 and the second sub-line 422 is the same as the direction of the sub-pixel row or the sub-pixel column. The direction of the sub-pixel row is the first direction X, and the direction of the sub-pixel column is the second direction Y.

[0074] Reference Figure 6 The touch electrode 30 includes a metal grid structure formed by a plurality of grid-shaped wirings. Each mesh of the metal grid structure corresponds to a sub-pixel SP. The touch electrode 30 is arranged in the metal grid structure, which means that each of the first electrode block 311 and the second electrode block 321 on the touch electrode 30 is arranged in a metal grid structure.

[0075] Optionally, in the arrangement direction of the second lead 42, the first sub-line 421 and the second sub-line 422 are arranged alternately, so that the structure of two adjacent second-type second leads 42-2 combined together is the same as the structure of the first-type second lead 42-1, and the structure of the first-type second lead 42-1 and the second-type second lead 42-2 combined together is the same as the structure of the touch electrode 30.

[0076] Since the first lead 41 of the first type of touch signal line 40-1 and the second lead 42 are completely the same in size and shape, and completely overlap in the thickness direction of the display panel 100, the shape design of the first lead 41 is identical to the shape design of the second lead 42, and the shape design of the second lead 42 can represent the corresponding shape design of the first lead 41, and can represent the corresponding shape design of the first type of touch signal line 40-1.

[0077] Specifically, refer to Figure 5, part of the first lead 41 includes the third sub-line 411 and the fourth sub-line 412, the third sub-line 411 and the fourth sub-line 412 are enclosed in a grid-like arrangement, and another part of the first lead 41 includes the third sub-line 411 or the fourth sub-line 412, that is, part of the first lead 41 is composed of the third sub-line 411 and the fourth sub-line 412, and another part of the first lead 41 is composed of one of the third sub-line 411 and the fourth sub-line 412, so that the first lead 41 is composed of the third sub-line 411 and the fourth sub-line 412. The width of the first lead 41 formed by the third sub-line 411 and the fourth sub-line 412 is greater than the width of the first lead 41 formed by one of the third sub-line 411 and the fourth sub-line 412. In other words, the first lead 41 formed by the third sub-line 411 and the fourth sub-line 412 is the first-type first lead 41-1, and the first lead 41 formed by the third sub-line 411 and one of the fourth sub-line 412 is the second-type first lead 41-2.

[0078] In one embodiment, referring to Figure 4 and Figure 5 , the first protective electrode 61 and the second protective electrode 62 are also formed by the first conductive layer 21 and the second conductive layer 22. The specific structural design of the first protective electrode 61 and the second protective electrode 62 can refer to the design of the first type of touch signal line 40-1, and will not be repeated here. In addition, the specific structure of the first lead 41 and the second lead 42 of the second type of touch signal line 40-2 located in the retracted area SA can also refer to the design of the first type of touch signal line 40-1. For example, on the second conductive layer 22, the first protective electrode 61, the first type of touch signal line 40-1, the second protective electrode 62, and the first sub-line 421 and the second sub-line 422 corresponding to the second type of touch signal line 40-2 are arranged alternately in sequence, as shown in FIG. Figure 4 As shown; on the first conductive layer 21, the first protective electrode 61, the first type of touch signal line 40-1, the second protective electrode 62 and the third sub-line 411 and the fourth sub-line 412 corresponding to the second type of touch signal line 40-2 are arranged alternately in sequence, so that the overall structure formed by the first protective electrode 61, the first type of touch signal line 40-1, the second protective electrode 62 and the second type of touch signal line 40-2 arranged in the retracted area SA is the same as the metal grid structure of the touch electrode 30, so as to simplify the process and make full use of the space of the display area AA.

[0079] In some embodiments, part of the second-type touch signal line 40-2 is located in the non-display area NA, and the width of the second-type touch signal line 40-2 located in the non-display area NA is smaller than the width of the second-type touch signal line 40-2 located in the display area AA.

[0080] In some other embodiments, at least part of the second-type touch signal lines 40-2 located in the first sub-area and the second sub-area may be arranged in the display area AA to reduce the areas of the first sub-area and the second sub-area, thereby further reducing the border area.

[0081] Based on the same inventive concept, the embodiment of the present application further provides a display device, which includes the display panel 100 described in one of the above embodiments. The display device can be a display terminal with a touch function such as a mobile phone, a tablet, a television, etc., which is not limited here.

[0082] According to the above embodiments, it can be seen that:

[0083] In a display panel and a display device provided by the present application, the display panel includes a display substrate and a touch function layer arranged on the display substrate, the touch function layer includes touch electrodes and touch signal lines connected to the touch electrodes, the touch electrodes are located in a display area of ​​the display panel, and in the display area, the touch electrodes close to the non-display area form a retracted area, and the retracted area is provided with a partial line segment of at least one of the touch signal lines, the touch function layer also includes a first conductive layer and a second conductive layer located on a side of the first conductive layer away from the display substrate, and at least part of the touch signal line located in the retracted area The touch signal line includes a first lead and a second lead that are electrically connected, the first lead is located in the first conductive layer, and the second lead is located in the second conductive layer; in this way, by setting at least part of the touch signal line in the display area, the non-display area occupied by the touch signal line can be reduced, thereby reducing the border area and achieving a narrow border; moreover, at least part of the touch signal line located in the retracted area is formed by connecting the first lead and the second lead located in different layers in parallel, so that more touch signal lines can be set in a limited display area while meeting the electrical requirements of the touch signal line, thereby further reducing the border area and achieving a narrower border.

[0084] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area located at least on one side of the display area; the display panel further comprises: Display substrate; A touch function layer is arranged on the display substrate, the touch function layer includes touch electrodes and touch signal lines connected to the touch electrodes, the touch electrodes are located in the display area, and a retracted area is formed in the display area near the touch electrodes in the non-display area, and the retracted area is provided with a partial line segment of at least one touch signal line; Among them, the touch function layer also includes a first conductive layer and a second conductive layer located on a side of the first conductive layer away from the display substrate, and at least part of the touch signal line located in the retracted area includes an electrically connected first lead and a second lead, the first lead is located in the first conductive layer, and the second lead is located in the second conductive layer.

2. The display panel according to claim 1, characterized in that: An orthographic projection of the first lead on the display substrate at least partially overlaps with an orthographic projection of the second lead on the display substrate.

3. The display panel according to claim 2, characterized in that: In the thickness direction of the display panel, the first lead line and the second lead line are completely overlapped.

4. The display panel according to claim 1, characterized in that: The touch electrodes include first touch electrodes arranged at intervals along a first direction, and second touch electrodes arranged at intervals along a second direction, the first touch electrodes are insulated from the second touch electrodes, and the first direction and the second direction intersect each other; The touch signal lines include first-type touch signal lines connected to the first touch electrodes, and second-type touch signal lines connected to the second touch electrodes; Wherein, at least part of the first-type touch signal lines and / or at least part of the second-type touch signal lines are located in the retracted area.

5. The display panel according to claim 4, characterized in that: The first touch electrode and the second touch electrode are both located in the second conductive layer. The touch function layer further includes a bridging electrode disposed in the same layer as the first lead. One of the first touch electrode and the second touch electrode is bridged by the bridging electrode.

6. The display panel according to claim 4, characterized in that: When part of the first-type touch signal lines and part of the second-type touch signal lines are located in the retracted area, the second-type touch signal lines are located on a side of the first-type touch signal lines away from the second touch electrodes; The touch function layer further includes a first protection electrode and a second protection electrode. The second touch electrode is isolated from the first type of touch signal line by the first protection electrode, and the first type of touch signal line is isolated from the second type of touch signal line by the second protection electrode.

7. The display panel according to claim 6, characterized in that: The first touch electrodes are touch driving electrodes, the second touch electrodes are touch sensing electrodes, and in the retracted area, the number of the first type of touch signal lines is greater than the number of the second type of touch signal lines.

8. The display panel according to claim 6, characterized in that: The display panel further comprises a touch driving chip arranged in the non-display area, and the touch electrodes are connected to the touch driving chip via the corresponding touch signal lines; Among the first-type touch signal lines located in the retracted area, the second leads include first-type second leads and second-type second leads, the width of the first-type second leads is greater than the width of the second-type second leads, and the distance between the first touch electrode connected to the first-type second leads and the touch driver chip is greater than the distance between the first touch electrode connected to the second-type second leads and the touch driver chip.

9. The display panel according to claim 6, characterized in that: Some of the second-type touch signal lines are located in the non-display area, and the width of the second-type touch signal lines located in the non-display area is smaller than the width of the second-type touch signal lines located in the retracted area.

10. The display panel according to claim 8, characterized in that: The first type of second lead includes a first sub-wire and a second sub-wire, the second type of second lead includes the first sub-wire or the second sub-wire, the first sub-wire and the second sub-wire are arranged in a grid-like pattern, and the touch electrode includes a metal grid structure formed by a plurality of the grid-like patterns.

11. The display panel according to claim 10, characterized in that: In an arrangement direction of the second lead lines, the first sub-lines and the second sub-lines are arranged alternately.

12. The display panel according to claim 10, characterized in that: The display panel further includes a plurality of sub-pixels arranged at intervals, wherein the sub-pixels are located in a partial area enclosed by the first sub-line and the second sub-line, and shapes of the first sub-line and the second sub-line match shapes of the corresponding sub-pixels.

13. The display panel according to claim 12, characterized in that: A plurality of the sub-pixels are arranged in sub-pixel rows, a plurality of the sub-pixels are arranged in sub-pixel columns, and the extending direction of the first sub-line and the second sub-line is the same as the direction of the sub-pixel rows or the sub-pixel columns.

14. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 1 to 13.

Images