Display panel and display device
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-08-13
Smart Images
Figure CN2025089425_13082026_PF_FP_ABST
Abstract
Description
Display panel and display device Technical Field
[0001] This application relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology
[0002] Currently, mature touch technologies include capacitive touch, infrared touch, and resistive touch. Among them, capacitive touch has become the mainstream form for small-sized organic light-emitting diode (OLED) display products due to its simple structure, convenient manufacturing process, and excellent performance. To achieve touch functionality, the touch electrodes located in the display area need to be connected to the touch driver chip in the non-display area via touch leads. This requires a large number of touch leads in the non-display area, which is not conducive to achieving a narrow bezel. Invention Overview
[0003] This application provides a display panel and display device to achieve a narrow bezel while satisfying touch functionality.
[0004] The technical solution provided in this application is as follows:
[0005] In a first aspect, embodiments of this application provide a display panel, which includes a display area and a non-display area located on at least one side of the display area; the display panel further includes:
[0006] Display substrate;
[0007] A touch function layer is disposed 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. In the display area, the touch electrodes near the non-display area are formed with a recessed area. The recessed area is provided with at least one partial segment of the touch signal line.
[0008] The touch function layer further includes a first conductive layer and a second conductive layer located on the side of the first conductive layer away from the display substrate. At least a portion of the touch signal lines located in the recessed area include 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.
[0009] Secondly, embodiments of this application also provide a display device, which includes the display panel described in one of the foregoing embodiments. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 is a schematic diagram of a planar structure of a display panel provided in an embodiment of this application.
[0012] Figure 2 is a partial cross-sectional structural diagram of the display panel provided in an embodiment of this application.
[0013] Figure 3 is a schematic diagram of the detailed structure at point M in Figure 1.
[0014] Figure 4 is a schematic diagram of the arrangement of the touch signal lines in the second conductive layer in Figure 3.
[0015] Figure 5 is a schematic diagram of the arrangement of the touch signal lines in the first conductive layer in Figure 3.
[0016] Figure 6 is a schematic diagram showing the partial structural details of the touch electrode in Figure 3. Embodiments of the present invention
[0017] The following descriptions of the embodiments are based on the accompanying illustrations, illustrating specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and understanding of this application, and not for limiting this application. In the figures, structurally similar units are denoted by the same reference numerals. In the figures, the thickness of some layers and regions is exaggerated for clarity and ease of description. That is, the dimensions and thicknesses of each component shown in the figures are arbitrarily shown, but this application is not limited thereto.
[0018] Please refer to Figures 1 to 6. Figure 1 is a planar structural schematic diagram of a display panel provided in an embodiment of this application. Figure 2 is a partial cross-sectional structural schematic diagram of the display panel provided in an embodiment of this application. Figure 3 is a detailed structural schematic diagram of point M in Figure 1. Figure 4 is a schematic diagram of the arrangement of touch signal lines in the second conductive layer in Figure 3. Figure 5 is a schematic diagram of the arrangement of touch signal lines in the first conductive layer in Figure 3. Figure 6 is a partial detailed structural schematic diagram of the touch electrode in Figure 3. Referring to Figures 1 and 3, the display panel 100 includes a display area AA and a non-display area NA located on at least 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 effective display area of the display panel 100, which can display images, while the non-display area NA does not have the function of displaying images.
[0019] 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 touch electrodes 30 and touch signal lines 40 connected to the touch electrodes 30. The touch electrodes 30 are located in the display area AA. Within the display area AA, a portion of the touch electrodes 30 is recessed relative to another portion of the touch electrodes 30 to form a recessed area SA. That is, the touch electrodes 30 near the non-display area NA have recessed areas SA, and the opening of the recessed area SA faces the non-display area NA. The recessed area SA has at least one segment of the touch signal line 40, and the touch signal line 40 is located on the side of the touch electrode 30 closest to the non-display area NA. Thus, by placing at least a portion of the touch signal line 40 in the display area AA, the area occupied by the touch signal line 40 in the non-display area NA can be reduced, thereby reducing the bezel area and achieving a narrow bezel.
[0020] The display panel 100 further includes a touch driver chip 50 disposed in the non-display area NA. The touch electrodes 30 are connected to the touch driver chip 50 via corresponding touch signal lines 40. The touch electrodes 30 include first touch electrodes 31 spaced apart along a first direction X and second touch electrodes 32 spaced apart along a second direction Y. The first touch electrodes 31 and the second touch electrodes 32 are insulated from each other. The first direction X and the second direction Y intersect, 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, if the first direction X is horizontal and the second direction Y is vertical, then the first direction X and the second direction Y are perpendicular.
[0021] 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 both ends of the second touch electrode 32, and the third sub-area and the fourth sub-area are located at both ends of the first touch electrode 31. The touch driver chip 50 is located in the fourth sub-area.
[0022] The first touch electrode 31 includes a plurality of first electrode blocks 311 interconnected in the second direction Y, and the second touch electrode 32 includes a plurality of second electrode blocks 321 interconnected in the first direction X. Two adjacent first electrode blocks 311 are connected by a first connecting portion, and two adjacent second electrode blocks 321 are connected by a second connecting portion. The second connecting portion is insulated from and crosses the first connecting portion, that is, the second connecting portion and the first connecting portion are located on different layers.
[0023] It should be noted that the number of the first touch electrode 31 and the second touch electrode 32 in this application is not limited to the number shown in Figure 1. Figure 1 is only an example. This application may also include more or fewer 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 not limited to the number shown in Figure 1.
[0024] In some embodiments, the display panel 100 employs mutual capacitance touch control, where 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 adjacent first electrode blocks 311 and second electrode blocks 321. The touch driving chip 50 provides touch driving signals to the touch driving electrodes and receives sensing signals returned by the touch sensing electrodes. Based on the sensing signals, it determines the location of the capacitor where the capacitance value changes, thereby determining the touch position.
[0025] In some other embodiments, the display panel 100 may also employ self-capacitance touch, for example, the first electrode block 311 and the second electrode block 321 respectively form a capacitor with ground, and the touch driving chip 50 respectively detects the detection signals returned by the first touch electrode 31 and the second touch electrode 32 to determine the change of capacitance of each electrode to ground before and after touch, thereby determining the touch position.
[0026] Referring to Figure 2, the touch function layer 20 is disposed on the light-emitting side of the display panel 100, which is also the side of the display panel 100 used for displaying images. 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 fabricated on the encapsulation layer 12 of the display panel 100 using DOT (Direct On Cell Touch) technology to reduce the thickness of the display panel 100.
[0027] In some embodiments, the display layer 11 may include a substrate and a thin-film transistor layer disposed on the substrate, the thin-film transistor layer being located on the side of the substrate closer to the encapsulation layer 12. The substrate may be a polyimide substrate. When the substrate is a flexible substrate, it may be formed of multiple sub-substrates of the same material, such as polyimide, with adjacent sub-substrates bonded together by adhesive sub-layers.
[0028] In some embodiments, the thin-film transistor layer includes a thin-film transistor, which includes a semiconductor located on a substrate. The semiconductor may be formed of polycrystalline silicon or a metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and source and drain regions formed on either side of the channel region. The thin-film transistor layer also includes a first gate insulating layer covering the semiconductor.
[0029] The thin-film transistor also includes a first gate formed on a first gate insulating layer, the first gate overlapping the channel region. The first gate may be formed as multiple layers or a single layer comprising low-resistance materials such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or materials with high corrosion resistance.
[0030] The thin-film transistor layer further includes a second gate insulating layer that covers the first gate. The thin-film transistor also includes a second gate located on the second gate insulating layer, overlapping the first gate. The second gate can be formed as multiple layers or a single layer comprising a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance. The thin-film transistor layer also includes an interlayer dielectric layer formed on the second gate.
[0031] The interlayer dielectric layer, the first gate insulating layer, and the second gate insulating layer include source contact holes and drain contact holes, and the source region and the drain region are exposed through the source contact holes and drain contact holes, respectively.
[0032] Thin-film transistors also include source and drain electrodes disposed on the same layer, both formed on the interlayer dielectric layer. The source electrode is connected to the source region through a source contact hole, and the drain electrode is connected to the drain region through a drain contact hole. The source and drain electrodes can be multiple layers or a single layer formed of low-resistance materials such as Al, Ti, Mo, Cu, Ni, or their alloys, or materials with high corrosion resistance. For example, the source and drain electrodes can be triple layers of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti, or Mo / Al / Mo, or other single-layer or multi-layer structures.
[0033] In some embodiments, the display layer 11 further includes a planarization layer located between the thin-film transistor layer and the light-emitting layer, the planarization layer covering the source and drain.
[0034] In some embodiments, the display layer 11 further includes an anode layer located on the side of the planarization layer away from the thin-film transistor layer. The anode layer includes a plurality of anodes, each corresponding to a light-emitting pixel unit on the display panel 100. Each anode is electrically connected to a thin-film transistor. The planarization layer includes anode contact holes through which the anodes contact the source or drain of the thin-film transistor.
[0035] In some embodiments, the display layer 11 further includes a pixel definition layer disposed on the side of the planarization layer away from the thin-film transistor layer. The pixel definition layer includes pixel definition portions and openings located between the pixel definition portions. The display layer 11 also includes a light-emitting layer comprising a plurality of light-emitting pixel units. The light-emitting pixel units are located within the openings. Each light-emitting pixel unit is a sub-pixel. The openings expose a portion of the anode, and the pixel definition portions cover the edge of the anode. The light-emitting pixel units may include red light-emitting pixel units, green light-emitting pixel units, and blue light-emitting pixel units.
[0036] In some embodiments, the display layer 11 further includes a cathode layer covering the light-emitting layer. In the direction from the anode to the cathode layer, the light-emitting layer includes a hole-injecting organic layer, a light-emitting material layer, and an electronic organic layer stacked sequentially. The hole-injecting organic layer may include a hole injection layer and a hole transport layer, with the hole injection layer in direct contact with the anode and the hole transport layer located between the hole injection layer and the light-emitting material layer. The hole-injecting 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, with the electron injection layer in direct contact with the cathode layer and the electron transport layer 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.
[0037] In some embodiments, the encapsulation layer 12 is located on the side of the cathode layer away from the light-emitting layer. The encapsulation layer 12 is formed by alternating stacking of multiple inorganic 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.
[0038] In some embodiments, referring to FIG2, the touch functional layer 20 is located on the side of the encapsulation layer 12 away from the light-emitting layer. The touch functional 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. At least a portion of the touch signal lines 40 located in the recessed region SA includes electrically connected first leads 41 and second leads 42, with the first lead 41 located in the first conductive layer 21 and the second lead 42 located in the second conductive layer 22. Thus, at least a portion of the touch signal lines 40 located in the recessed region SA are formed by parallel connection of first leads 41 and second leads 42 located on different layers. This reduces the linewidth of the touch signal lines 40 while meeting their electrical requirements, allowing for more touch signal lines 40 to be placed within the limited display area AA, thereby further reducing the bezel area and achieving a narrower bezel.
[0039] Optionally, the touch electrode 30 is located in the second conductive layer 22, that is, both the first touch electrode 31 and the second touch electrode 32 are located in the second conductive layer 22. The touch function layer 20 also includes a bridging electrode 312 disposed 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 through the bridging electrode 312. This embodiment takes the first touch electrode 31 being bridged through the bridging electrode 312 as an example. That is, the bridging electrode 312 is a first connecting part connecting two adjacent first electrode blocks 311. The two adjacent first electrode blocks 311 are bridged through the bridging electrode 312 to achieve communication. At this time, the first connecting part is located in the first conductive layer 21, and the second connecting part is located in the second conductive layer 22.
[0040] Optionally, the first conductive layer 21 and the second conductive layer 22 may be made of transparent materials, such as indium tin oxide, or they may be made of metallic materials, such as at least one of titanium, aluminum, silver, copper, or a titanium / aluminum / titanium three-layer metal structure.
[0041] Referring again to Figure 2, the touch function layer 20 further includes a first interlayer insulating layer 23, which is located between the first conductive layer 21 and the second conductive layer 22. A first via and a second via are provided on the first interlayer insulating layer 23. The first via exposes a portion of the bridging electrode 312, and an adjacent first electrode block 311 is connected to the bridging electrode 312 through the first via. The second via exposes a portion of the first lead 41, and the second lead 42 is connected to the first lead 41 through the second via.
[0042] In some embodiments, the touch function layer 20 further includes a second interlayer insulating layer 24 and a protective layer 25. The second interlayer insulating layer 24 is located on the side of the first conductive layer 21 closest 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 the 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.
[0043] 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. The protective layer 25 is an insulating dry film, such as PAS (polyalum irlillm sulfate), which can protect the touch electrode 30 from oxidation and detachment.
[0044] In one embodiment, the orthographic projection of the first lead 41 on the display substrate 10 at least partially overlaps 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 first lead 41 and the second lead 42 have the same shape and size, and the first lead 41 and the second lead 42 completely coincide in the thickness direction of the display panel 100. In this way, 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 bezel.
[0045] Referring to Figure 3, the touch signal line 40 includes a first type of touch signal line 40-1 connected to the first touch electrode 31 and a second type of touch signal line 40-2 connected to the second touch electrode 32. The first type of touch signal line 40-1 is connected between the first touch electrode 31 and the touch driver chip 50, and the second type of touch signal line 40-2 is connected between the second touch electrode 32 and the touch driver chip 50. At least a portion of the first type of touch signal line 40-1 and / or at least a portion of the second type of touch signal line 40-2 are located in the recessed area SA.
[0046] In this application, the phrase "touch signal line 40 located in the recessed area SA" means that a portion of the touch signal line 40 is located in the recessed area SA. Conversely, "a portion of the touch signal line 40 located in the recessed area SA" means that at least a portion of the main body of a single touch signal line 40 is located within the recessed area SA. Each touch signal line 40 includes a first end connected to the touch electrode 30, a second end connected to the touch driver chip 50, and a main body connecting the first end and the second end. The length of the main body is greater than the lengths 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 a first direction X, the second end extends along a second direction Y, and the main body first extends along the second direction Y and then along the first direction X. Typically, the first end and the corresponding touch electrode 30 are both located within the display area AA, while the main body is located within the non-display area NA. The main body being located within the non-display area NA results in a larger bezel, which is not conducive to achieving a narrow bezel. In this application, by setting an indentation area SA to place part of the main body of the touch signal line 40, the space in the non-display area AA originally occupied by the main body can be saved, thereby reducing the area of the non-display area and achieving a narrow bezel.
[0047] For example, taking a portion of the second type of touch signal line 40-2 located in the recessed area SA as an example, each second type of touch signal line 40-2 includes a first end, a main body, and a second end. The first end is connected to the second touch electrode 32, and the second end is connected to the touch driver 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, and 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.
[0048] Referring again to Figure 3, this embodiment illustrates an example where a portion of the first type of touch signal line 40-1 and a portion of the second type of touch signal line 40-2 are located within the recessed area SA. Within the recessed area SA, the second type of touch signal line 40-2 is located on the side of the first type of touch signal line 40-1 furthest from the second touch electrode 32. The first type of touch signal line 40-1 is insulated from the second touch electrode 32, and the first type of touch signal line 40-1 and the second type of touch signal line 40-2 are also insulated from each other.
[0049] 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 type of touch signal line 40-1 through the first protective electrode 61, and the first type of touch signal line 40-1 is isolated from the second type of touch signal line 40-2 through the second protective electrode 62. The first protective electrode 61 is used to shield the second touch electrode 32 and the first type of touch signal line 40-1, preventing 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 also from the first type of touch signal line 40-1. The second protective electrode 62 is used to shield the first type of touch signal line 40-1 and the second type of touch signal line 40-2, preventing mutual interference between the first touch signal line 40 and the second type of touch signal line 40-2. The second protective electrode 62 is insulated from the first type of touch signal line 40-1 and also from the second type of touch signal line 40-2.
[0050] In one embodiment, within the recessed 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 is 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. 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. Placing as many first type of touch signal lines 40-1 as possible within the recessed area SA increases the number of second type of touch signal lines 40-2 within the recessed area SA, thereby reducing the area occupied by the second type of touch signal lines 40-2 in the fourth sub-area. The fourth sub-area is the lower border of the display panel 100. Reducing the area of the fourth sub-area most effectively achieves an extremely narrow bezel.
[0051] In one embodiment, referring to Figures 3 and 4, in the first type of touch signal line 40-1 located in the recessed area SA, the width of a portion of the first type of touch signal line 40-1 is greater than the width of another portion of the first type of touch signal line 40-1. Taking the second lead 42 of the first type of touch signal line 40-1 as an example, the second lead 42 includes a first type of second lead 42-1 and a second type of second lead 42-2. The width of the first type of second lead 42-1 is greater than the width of the second type of second lead 42-2. The distance between the first touch electrode 31 connected to the second type of second lead 42-1 and the touch driver chip 50 is greater than the distance between the first touch electrode 31 connected to the second type of second lead 42-2 and the touch driver chip 50. That is, the first type of second lead 42-1 with a larger width also has a larger length. By making the width of the first type of second lead 42-1 greater than the width of the second type of second lead 42-2, the impedance on the first type of second lead 42-1 and the second type of second lead 42-2 can be made consistent.
[0052] Since the first lead 41 and the second lead 42 of the first type of touch signal line 40-1 are exactly the same in size and shape, and completely overlap in the thickness direction of the display panel 100, the line width design of the first lead 41 is the same as that of the second lead 42. 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 of touch signal line 40-1.
[0053] Specifically, referring to Figure 5, the first lead 41 includes a first type of first lead 41-1 and a second type of first lead 41-2. The width of the first type of first lead 41-1 is greater than the width of the second type of first lead 41-2. The distance between the first touch electrode 31 connected to the first type of 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 of first lead 41-2 and the touch driver chip 50. That is, the first type of first lead 41-1 with a larger width also has a larger length. By making the width of the first type of first lead 41-1 greater than the width of the second type of first lead 41-2, the impedance on the first type of first lead 41-1 and the second type of first lead 41-2 can be made consistent.
[0054] In one embodiment, referring to Figures 3, 4, and 5, a portion of the second lead 42 includes a first sub-line 421 and a second sub-line 422, which are arranged in a grid-like pattern. Another portion of the second lead 42 includes either the first sub-line 421 or the second sub-line 422. That is, a portion of the second lead 42 is composed of the first sub-line 421 and the second sub-line 422, while another portion of the second lead 42 is composed of either the first sub-line 421 or the second sub-line 422. Thus, the second lead 42 composed of the first sub-line 421 and the second sub-line 422 is fully enclosed, while the second lead 42 composed of either the first sub-line 421 or the second sub-line 422 is semi-enclosed. Thus, the width of the second lead 42 formed by the first sub-line 421 and the second sub-line 422 is greater than the width of the second lead 42 formed by either the first sub-line 421 or the second sub-line 422. In other words, the second lead 42 formed by the first sub-line 421 and the second sub-line 422 is the first type of second lead 42-1, and the second lead 42 formed by either the first sub-line 421 or the second sub-line 422 is the second type of second lead 42-2. The first type of second lead 42-1 includes the first sub-line 421 and the second sub-line 422, and the second type of second lead 42-2 includes either the first sub-line 421 or the second sub-line 422.
[0055] Referring to Figures 3 and 6, the display panel 100 further includes a plurality of spaced sub-pixels SP, which are located in a portion of the area enclosed by the first sub-line 421 and the second sub-line 422. The shapes of the first sub-line 421 and the second sub-line 422 are adapted to the shapes of the corresponding sub-pixels SP.
[0056] The multiple sub-pixels SP are arranged in a sub-pixel row, and the multiple sub-pixels SP are arranged in a sub-pixel column. The extension directions of the first sub-line 421 and the second sub-line 422 are the same as the directions 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.
[0057] Referring to Figure 6, the touch electrode 30 includes a metal mesh structure composed of multiple mesh-like traces. Each mesh of the metal mesh structure corresponds to a sub-pixel SP. Specifically, the touch electrode 30 being configured with the metal mesh structure means that each of the first electrode blocks 311 and the second electrode blocks 321 on the touch electrode 30 is configured with a metal mesh structure.
[0058] Optionally, in the arrangement direction of the second lead 42, the first sub-line 421 and the second sub-line 422 are arranged alternately. In this way, 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.
[0059] Since the first lead 41 and the second lead 42 of the first type of touch signal line 40-1 are exactly 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 and the shape design of the second lead 42 are identical. Therefore, the shape design of the second lead 42 can characterize the shape design of the corresponding first lead 41, and can also characterize the shape design of the corresponding first type of touch signal line 40-1.
[0060] Specifically, referring to Figure 5, a portion of the first lead 41 includes a third sub-line 411 and a fourth sub-line 412, the third sub-line 411 and the fourth sub-line 412 forming a grid-like routing; another portion of the first lead 41 includes either the third sub-line 411 or the fourth sub-line 412. That is, a portion of the first lead 41 is composed of the third sub-line 411 and the fourth sub-line 412, while another portion of the first lead 41 is composed of only one 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 either the third sub-line 411 or 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 of first lead 41-1, and the first lead 41 formed by either the third sub-line 411 or the fourth sub-line 412 is the second type of first lead 41-2.
[0061] In one embodiment, referring to Figures 4 and 5, the first protective electrode 61 and the second protective electrode 62 are also formed using 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 described again 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 recessed 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 Figure 4; 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 in the recessed area SA is the same as the metal mesh structure of the touch electrode 30, so as to simplify the process and make full use of the space of the display area AA.
[0062] In some embodiments, a portion of the second type of touch signal line 40-2 is located in the non-display area NA, and the width of the second type of touch signal line 40-2 located in the non-display area NA is smaller than the width of the second type of touch signal line 40-2 located in the display area AA.
[0063] In some other embodiments, at least a portion of the second type of touch signal lines 40-2 located in the first sub-area and the second sub-area may be disposed within the display area AA to reduce the area of the first sub-area and the second sub-area, thereby further reducing the bezel area.
[0064] Based on the same inventive concept, this application also provides a display device, which includes the display panel 100 described in one of the foregoing embodiments. The display device can be a touch-enabled display terminal such as a mobile phone, tablet, or television, and is not limited thereto.
[0065] As can be seen from the above embodiments:
[0066] This application provides a display panel and a display device. The display panel includes a display substrate and a touch functional layer disposed on the display substrate. The touch functional layer includes touch electrodes and touch signal lines connected to the touch electrodes. The touch electrodes are located in the display area of the display panel. Within the display area, a recessed region is formed on the touch electrodes near the non-display area. At least a portion of the touch signal line is disposed in the recessed region. The touch functional layer further includes a first conductive layer and a second conductive layer located on the side of the first conductive layer away from the display substrate. At least a portion of the touch signal line is disposed in the recessed region. 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 placing at least a portion of the touch signal line in the display area, the area of the non-display area occupied by the touch signal line can be reduced, thereby reducing the bezel area and achieving a narrow bezel. Moreover, at least a portion of the touch signal line located in the recessed area is formed by connecting the first lead and the second lead located in different layers in parallel. This allows for more touch signal lines to be placed in the limited display area while meeting the electrical requirements of the touch signal line, thereby further reducing the bezel area and achieving a narrower bezel.
[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0068] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A display panel comprising a display area and a non-display area located on at least one side of the display area; The display panel also includes: Display substrate; A touch function layer is disposed 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. In the display area, the touch electrodes near the non-display area form a recessed area. The recessed area is provided with at least one partial segment of the touch signal line. The touch function layer further includes a first conductive layer and a second conductive layer located on the side of the first conductive layer away from the display substrate. At least a portion of the touch signal lines located in the recessed area include 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.
2. The display panel according to claim 1, wherein, 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.
3. The display panel according to claim 2, wherein, In the thickness direction of the display panel, the first lead and the second lead are arranged to completely overlap.
4. The display panel according to claim 1, wherein, The touch electrode includes a first touch electrode arranged at intervals along a first direction and a second touch electrode arranged at intervals along a second direction. The first touch electrode and the second touch electrode are insulated from each other, and the first direction and the second direction are intersecting. The touch signal lines include a first type of touch signal line connected to the first touch electrode and a second type of touch signal line connected to the second touch electrode; Wherein, at least a portion of the first type of touch signal lines and / or at least a portion of the second type of touch signal lines are located in the recessed area.
5. The display panel according to claim 4, wherein, Both the first touch electrode and the second touch electrode are located in the second conductive layer. The touch function layer also 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 through the bridging electrode.
6. The display panel according to claim 4, wherein, When a portion of the first type of touch signal line and a portion of the second type of touch signal line are located in the recessed area, the second type of touch signal line is located on the side of the first type of touch signal line away from the second touch electrode; 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 through the first protection electrode, and the first type of touch signal line is isolated from the second type of touch signal line through the second protection electrode.
7. The display panel according to claim 6, wherein, The first touch electrode is a touch driving electrode, and the second touch electrode is a touch sensing electrode. Within the recessed 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, wherein, The display panel also includes a touch driver chip disposed in the non-display area, and the touch electrodes are connected to the touch driver chip through corresponding touch signal lines; In the first type of touch signal line located in the recessed area, the second lead includes a first type of second lead and a second type of second lead. The width of the first type of second lead is greater than the width of the second type of second lead. The distance between the first touch electrode connected to the first type of second lead and the touch driver chip is greater than the distance between the first touch electrode connected to the second type of second lead and the touch driver chip.
9. The display panel according to claim 6, wherein, Some of the second type of touch signal lines are located in the non-display area, and the width of the second type of touch signal lines located in the non-display area is smaller than the width of the second type of touch signal lines located in the recessed area.
10. The display panel according to claim 8, wherein, The first type of second lead includes a first sub-line and a second sub-line, and the second type of second lead includes either the first sub-line or the second sub-line. The first sub-line and the second sub-line are arranged in a grid-like routing pattern, and the touch electrode includes a metal grid structure composed of multiple grid-like routing patterns.
11. The display panel according to claim 10, wherein, In the arrangement direction of the second lead, the first sub-line and the second sub-line are arranged alternately.
12. The display panel according to claim 10, wherein, The display panel also includes a plurality of spaced sub-pixels, which are located in a portion of the 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.
13. The display panel according to claim 12, wherein, The multiple sub-pixels are arranged in a sub-pixel row, and the multiple sub-pixels are arranged in a sub-pixel column, wherein the extension direction of the first sub-line and the second sub-line is the same as the direction of the sub-pixel row or the sub-pixel column.
14. A display device comprising a display panel, the display panel including a display area and a non-display area located on at least one side of the display area; The display panel also includes: Display substrate; A touch function layer is disposed 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. In the display area, the touch electrodes near the non-display area form a recessed area. The recessed area is provided with at least one partial segment of the touch signal line. The touch function layer further includes a first conductive layer and a second conductive layer located on the side of the first conductive layer away from the display substrate. At least a portion of the touch signal lines located in the recessed area include 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.
15. The display device according to claim 14, wherein, 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.
16. The display device according to claim 14, wherein, The touch electrode includes a first touch electrode arranged at intervals along a first direction and a second touch electrode arranged at intervals along a second direction. The first touch electrode and the second touch electrode are insulated from each other, and the first direction and the second direction are intersecting. The touch signal lines include a first type of touch signal line connected to the first touch electrode and a second type of touch signal line connected to the second touch electrode; Wherein, at least a portion of the first type of touch signal lines and / or at least a portion of the second type of touch signal lines are located in the recessed area.
17. The display device according to claim 16, wherein, When a portion of the first type of touch signal line and a portion of the second type of touch signal line are located in the recessed area, the second type of touch signal line is located on the side of the first type of touch signal line away from the second touch electrode; 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 through the first protection electrode, and the first type of touch signal line is isolated from the second type of touch signal line through the second protection electrode.
18. The display device according to claim 17, wherein, The display panel also includes a touch driver chip disposed in the non-display area, and the touch electrodes are connected to the touch driver chip through corresponding touch signal lines; In the first type of touch signal line located in the recessed area, the second lead includes a first type of second lead and a second type of second lead. The width of the first type of second lead is greater than the width of the second type of second lead. The distance between the first touch electrode connected to the first type of second lead and the touch driver chip is greater than the distance between the first touch electrode connected to the second type of second lead and the touch driver chip.
19. The display device according to claim 18, wherein, The first type of second lead includes a first sub-line and a second sub-line, and the second type of second lead includes either the first sub-line or the second sub-line. The first sub-line and the second sub-line are arranged in a grid-like routing pattern, and the touch electrode includes a metal grid structure composed of multiple grid-like routing patterns.
20. The display device according to claim 19, wherein, In the arrangement direction of the second lead, the first sub-line and the second sub-line are arranged alternately.