Touch panel and display device

Abstract

The invention provides a touch panel and a display device. The touch panel comprises a base layer; the first conducting layer comprises a first conducting circuit arranged on the base layer; a first insulating layer on the base layer; the second conducting layer comprises a second conducting circuit located on the base layer, the second conducting circuit comprises a first sub-part, a first connecting part and a second sub-part which are connected in sequence, and the orthographic projection of the first connecting part on the base layer is overlapped with the orthographic projection of the first conducting circuit on the base layer; the orthographic projections of the first sub-part and the second sub-part on the base layer are located outside the orthographic projection of the first conductive circuit on the base layer; wherein the first insulating layer is located between the first conductive layer and the second conductive layer. According to the embodiment of the invention, the bending performance of the touch panel can be improved.

Description

Technical Field

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

[0002] For a bent display module product, a parallel plate test is performed to simulate the bending of the whole machine. The bending ability of the product is quantified according to the distance between the parallel plates when the minimum bending area is probed without cracks.

[0003] During the test, both side surfaces of the display module are fixed to the upper and lower steel plates of the parallel plate test device by paper tape. Among them, the upper steel plate presses down to bend the display module. After multiple external folding parallel plate tests, it is found that the film layer in the display module is prone to cracks.

[0004] Based on this, improving the anti-fracture ability of folding products is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] In view of this, embodiments of the present invention are committed to providing a touch panel and a display device to solve the problem that cracks are likely to appear at the edge of the wiring in the bent area of the display module in related technologies.

[0006] According to a first aspect of the present application, a touch panel is provided, including a foldable area, and the foldable area is provided with: a base layer, a first conductive layer, a first insulating layer, and a second conductive layer. The first conductive layer includes a first conductive line disposed on the base layer. The first insulating layer is located on the base layer. The second conductive layer includes a second conductive line located on the base layer. The second conductive line includes a first sub-part, a first connecting part, and a second sub-part connected in sequence. The orthographic projection of the first connecting part on the base layer overlaps with the orthographic projection of the first conductive line on the base layer. At least part of the orthographic projection of the first sub-part on the base layer is located outside the orthographic projection of the first conductive line on the base layer. At least part of the orthographic projection of the second sub-part on the base layer is located outside the orthographic projection of the first conductive line on the base layer. Among them, the first insulating layer is located between the first conductive layer and the second conductive layer.

[0007] In combination with the first aspect, in some implementation manners of the first aspect, the first conductive line includes a first part, a second connecting part, and a second part connected in sequence. The arrangement direction of the first sub-part, the first connecting part, and the second sub-part intersects with the extending direction of the second connecting part; the orthographic projection of the second connecting part on the base layer overlaps with the orthographic projection of the first connecting part on the base layer.

[0008] In combination with the first aspect, in some implementation manners of the first aspect, the extending direction of the second connecting part is parallel to the bending direction of the foldable area.

[0009] In combination with the first aspect, in some implementations of the first aspect, the touch panel further includes a first non-foldable area and a second non-foldable area, located on opposite sides of the foldable area, and the arrangement directions of the first non-foldable area, the foldable area, and the second non-foldable area are parallel to the bending direction.

[0010] In combination with the first aspect, in some implementations of the first aspect, the extending direction of the second connecting portion intersects the extending direction of the first portion, and the extending direction of the second connecting portion intersects the extending direction of the second portion.

[0011] In combination with the first aspect, in some implementations of the first aspect, at least a part of the orthographic projection of the second connecting portion on the base layer is located within the orthographic projection of the first connecting portion on the base layer.

[0012] In combination with the first aspect, in some implementations of the first aspect, at least a part of the orthographic projection of the first portion on the base layer does not overlap with the orthographic projection of the first connecting portion on the base layer, and at least a part of the orthographic projection of the second portion on the base layer does not overlap with the orthographic projection of the first connecting portion on the base layer.

[0013] In combination with the first aspect, in some implementations of the first aspect, the extending direction of the first portion is parallel to the extending direction of the second portion.

[0014] In combination with the first aspect, in some implementations of the first aspect, the width of the first connecting portion is greater than the width of the first sub-portion, and the width of the first connecting portion is greater than the width of the second sub-portion.

[0015] In combination with the first aspect, in some implementations of the first aspect, the area of the orthographic projection of the second connecting portion on the base layer is smaller than the area of the orthographic projection of the first connecting portion on the base layer.

[0016] In combination with the first aspect, in some implementations of the first aspect, the shape of the first connecting portion is rectangular.

[0017] In combination with the first aspect, in some implementations of the first aspect, the shape of the first connecting portion is square.

[0018] In combination with the first aspect, in some implementations of the first aspect, at least some vertices of the first connecting portion in the orthographic projection on the base layer are located within the orthographic projection of the first sub-portion, the second sub-portion, or the first conductive circuit on the base layer.

[0019] In combination with the first aspect, in some implementations of the first aspect, the first connecting portion includes a first side, and the vertices at both ends of the first side in the orthographic projection on the base layer are located within the orthographic projection of the first conductive circuit on the base layer, and the extending direction of the first side is perpendicular to the bending direction of the foldable area.

[0020] In combination with the first aspect, in some implementations of the first aspect, the touch panel further includes a first non-foldable area and a second non-foldable area, which are located on opposite sides of the foldable area, and the arrangement directions of the first non-foldable area, the foldable area, and the second non-foldable area are parallel to the bending direction.

[0021] In combination with the first aspect, in some implementations of the first aspect, the width of the first connecting portion is greater than the width of the first sub-portion, and the width of the first connecting portion is greater than the width of the second sub-portion. The first conductive line includes a first portion, a second connecting portion, and a second portion that are sequentially connected. The orthographic projection of the first connecting portion on the base layer is located within the orthographic projection of the second connecting portion on the base layer; the orthographic projection area of the first connecting portion on the base layer is smaller than the orthographic projection area of the second connecting portion on the base layer.

[0022] In combination with the first aspect, in some implementations of the first aspect, the width of the second connecting portion is greater than the width of the first portion, and the width of the second connecting portion is greater than the width of the second portion.

[0023] In combination with the first aspect, in some implementations of the first aspect, the touch panel further includes: a plurality of first touch electrode blocks, which are arranged on the base layer, and two adjacent first touch electrode blocks along the first direction are connected by a first conductive line.

[0024] In combination with the first aspect, in some implementations of the first aspect, the touch panel further includes: a plurality of second touch electrode blocks, which are arranged on the base layer, and two adjacent second touch electrode blocks along the second direction are connected by a second conductive line. Among them, the first direction and the second direction intersect.

[0025] In combination with the first aspect, in some implementations of the first aspect, one of the first touch electrode block and the second touch electrode block is a touch driving electrode, and the other is a touch sensing electrode.

[0026] In combination with the first aspect, in some implementations of the first aspect, one of the first touch electrode block and the second touch electrode block is located in the first conductive layer, and the other is located in the second conductive layer; or, the first touch electrode block and the second touch electrode block are located in the first conductive layer, or, the first touch electrode block and the second touch electrode block are located in the second conductive layer.

[0027] In combination with the first aspect, in some implementations of the first aspect, the touch panel further includes: a plurality of first touch electrode blocks, which are arranged on the base layer, and two adjacent first touch electrode blocks along the first direction are connected by a connection structure, and the connection structure includes at least one first conductive line and at least one second conductive line connected by a via hole penetrating through the first insulating layer; a plurality of second touch electrode blocks, which are arranged on the base layer, and two adjacent second touch electrode blocks along the second direction are connected by at least one first conductive line or at least one second conductive line; the first direction and the second direction intersect.

[0028] In combination with the first aspect, in some implementations of the first aspect, the first touch electrode block and the second touch electrode block are located on the first conductive layer, or the first touch electrode block and the second touch electrode block are located on the second conductive layer.

[0029] In combination with the first aspect, in some implementations of the first aspect, one of the first touch electrode block and the second touch electrode block is a touch driving electrode, and the other is a touch sensing electrode.

[0030] In combination with the first aspect, in some implementations of the first aspect, the first touch electrode block and the second touch electrode block are in a grid shape.

[0031] In combination with the first aspect, in some implementations of the first aspect, the materials of the first touch electrode block and the second touch electrode block include metal, metal oxide or alloy.

[0032] In combination with the first aspect, in some implementations of the first aspect, the first direction is perpendicular to the second direction.

[0033] In combination with the first aspect, in some implementations of the first aspect, between two adjacent first touch electrode blocks along the first direction are connected by at least two first conductive lines; between two adjacent second touch electrode blocks along the second direction are connected by at least two second conductive lines; and / or, the first conductive layer is located between the base layer and the second conductive layer, or the second conductive layer is located between the base layer and the first conductive layer.

[0034] According to the second aspect of the present application, a display device is provided, including the touch panel as described in the foregoing embodiments.

[0035] For the touch panel and the display device according to the embodiments of the present invention, by making at least part of the first sub - part have a positive projection on the base layer outside the positive projection of the first conductive line on the base layer, and at least part of the first sub - part and the second sub - part are respectively outside the positive projection of the first conductive line on the base layer, the bending performance of the touch panel can be improved. Description of the Drawings

[0036] Figure 1 Shown is a perspective view of a parallel - plate test device in the related art.

[0037] Figure 2 is Figure 1 Shown is a simplified schematic principle diagram of the parallel - plate test device.

[0038] Figure 3 Shown is a partial cross - sectional structure schematic diagram of an easily - broken position in the bending area of a display module in the related art.

[0039] Figure 4It is a schematic diagram of a partial cross-sectional structure of a bent area of a touch panel according to an embodiment of the present invention.

[0040] Figure 5 It is a schematic top view structure diagram of a bridge point of a touch layer of a touch panel according to an embodiment of the present invention.

[0041] Figure 6 It is a schematic top view of a partial structure of a touch layer of a touch panel according to an embodiment of the present invention.

[0042] Figure 7 It is a schematic diagram of a foldable area and an adjacent area of a touch panel according to an embodiment of the present invention.

[0043] Figure 8 It is a schematic top view structure diagram of a bridge point of a touch layer of a touch panel according to another embodiment of the present invention.

[0044] Figure 9 It is a schematic top view of a partial structure of a touch layer of a touch panel according to an embodiment of the present invention.

[0045] Figure 10 It is a schematic top view of a partial structure of a touch layer of a touch panel according to another embodiment of the present invention.

[0046] Figure 11 It is a schematic top view of a partial structure of a touch layer of a touch panel according to still another embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1 - Parallel plate test device;

[0049] 101 - Upper steel plate;

[0050] 102 - Lower steel plate;

[0051] 103 - Paper tape;

[0052] 2 - Display module;

[0053] 201 - First metal layer;

[0054] 202 - Insulating layer;

[0055] 203 - Second metal layer;

[0056] 3 - Touch panel;

[0057] 301 - Base layer;

[0058] 302 - First conductive circuit;

[0059] 3021 - First part;

[0060] 3022 - Second connecting part;

[0061] 3023 - Second part;

[0062] 303 - First insulating layer;

[0063] 304 - Second conductive line;

[0064] 3041 - First sub - part;

[0065] 3042 - First connection part;

[0066] 3043 - Second sub - part;

[0067] 3044 - First side;

[0068] 3045 - Vertex;

[0069] 305 - First touch electrode block;

[0070] 306 - Second touch electrode block;

[0071] 307 - Via;

[0072] x - First direction;

[0073] y - Second direction. Detailed implementation manners

[0074] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some of the well - known structures and technologies are not shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0075] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or sequence.

[0076] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0077] Figure 1 Shown is a perspective view of a parallel plate testing device in the related art; Figure 2 yes Figure 1 A simplified schematic diagram of the parallel plate test setup is shown; Figure 3 The figure shows a schematic diagram of a partial cross-sectional structure of a breakable position in a bending area of ​​a display module in the related art.

[0078] In related technologies, such as Figures 1 to 3 As shown, the parallel plate test device 1 includes an upper steel plate 101 and a lower steel plate 102, a plurality of guide posts are arranged on the lower steel plate 102, a guide hole matching the upper steel plate 101 is arranged on the upper steel plate 101, and a driving device is arranged on the upper steel plate 101, and the driving device drives the upper steel plate 101 to move in the vertical direction under the action of the guide posts. During the test, the two ends of the display module 2 are respectively attached to the upper steel plate 101 and the lower steel plate 102 by paper tape 103, and the display module 2 is subjected to an external folding test by the upper and lower steel plates. Figure 3 As described, in the schematic diagram of the partial cross-sectional structure of the display module 2, cracks start and concentrate at the metal edge position. Specifically, a first metal layer 201 is laid on the base layer, an insulating layer 202 is laid on the base layer and the first metal layer 201, and a second metal layer 203 is laid on the insulating layer. After bending, the stress of the first metal layer 201 and the second metal layer 203 is concentrated at the edge, which makes it easy for the insulating layer 202 to crack at the edge.

[0079] Therefore, improving the fracture resistance of the insulation layer of folding products is a technical problem that needs to be solved urgently.

[0080] Based on this, in order to at least alleviate or solve the above-mentioned technical problems to a certain extent, this application is proposed.

[0081] The touch panel disclosed in the embodiments of the present application can be but is not limited to mobile display devices such as mobile phones, tablets, laptop computers, and wearable devices; it can also be but is not limited to fixed display devices such as exhibition stands, visualization display windows, and desktop monitors; it can also be but is not limited to consumer entertainment products such as electric toys, game consoles, device remote controls, and head-mounted displays; it can also be but is not limited to industrial-grade devices such as industrial robots, touch consoles, power tools, and detection tools; it can also be but is not limited to transportation vehicles with display requirements such as automobiles and battery-powered vehicles, as well as other device terminals that may have display requirements.

[0082] It should be noted that the display panel to which the touch panel disclosed in the embodiments of the present application is applied can be a liquid crystal display panel, an organic light-emitting diode display panel, a micro light-emitting diode display panel, etc.

[0083] For a better understanding of the present application, the following combines Figures 4 to 11 to describe in detail the touch panel and the display device in the embodiments of the present application.

[0084] Figure 4 is a partial cross-sectional structural schematic diagram of the bending area of the touch panel according to an embodiment of the present invention, Figure 5 is a top-view structural schematic diagram of the bridge point of the touch layer of the touch panel according to an embodiment of the present invention, Figure 6 is a partial top-view structural schematic diagram of the touch layer of the touch panel according to an embodiment of the present invention.

[0085] On the one hand, the present invention provides a touch panel. As shown in Figure 4 and Figure 5 , the touch panel 3 includes a foldable area, and the foldable area is provided with: a base layer 301, a first conductive layer, a first insulating layer 303, and a second conductive layer. The first conductive layer includes a first conductive line 302 disposed on the base layer 301. The first insulating layer 303 is located on the base layer 301. The second conductive layer includes a second conductive line 304 located on the base layer 301. The second conductive line 304 includes a first sub-part 3041, a first connection part 3042, and a second sub-part 3043 that are connected in sequence. The orthographic projection of the first connection part 3042 on the base layer 301 overlaps with the orthographic projection of the first conductive line 302 on the base layer 301. At least a part of the orthographic projection of the first sub-part 3041 on the base layer 301 is located outside the orthographic projection of the first conductive line 302 on the base layer 301. At least a part of the orthographic projection of the second sub-part 3043 on the base layer 301 is located outside the orthographic projection of the first conductive line 302 on the base layer 301. Among them, the first insulating layer 303 is located between the first conductive layer and the second conductive layer.

[0086] In this embodiment, by making the orthographic projection of at least a part of the first sub - part 3041 on the base layer 301 located outside the orthographic projection of the first conductive line 302 on the base layer 301, and at least a part of the first sub - part 3041 and the second sub - part 3043 are respectively located outside the orthographic projection of the first conductive line 302 on the base layer 301, it can be ensured that the second conductive line 304 in the second conductive layer envelopes the first conductive line 302 in the first conductive layer, increasing the metal boundary distance and dispersing the stress of the first conductive line 302 and the second conductive line 304 on the first insulating layer 303 between the first conductive layer and the second conductive layer. Thus, the bending performance of the touch panel 3 is improved.

[0087] Combined with the first aspect, in some implementation manners of the first aspect, such as Figure 5 As shown, the first conductive line 302 includes a first part 3021, a second connection part 3022, and a second part 3023 connected in sequence. The arrangement direction X1 of the first sub - part 3041, the first connection part 3042, and the second sub - part 3043 intersects with the extension direction X2 of the second connection part 3022; the orthographic projection of the second connection part 3022 on the base layer 301 overlaps with the orthographic projection of the first connection part 3042 on the base layer 301.

[0088] In this embodiment, by designing the first conductive line 302 to include the second connection part 3022 and making the second connection part 3022 overlap with the first connection part 3042 of the second conductive line 304, the stress generated when the touch panel is bent can be more effectively dispersed, increasing the structural stability of the touch panel in the bending area, which helps the touch panel to still maintain good touch performance and appearance integrity after multiple bends. For example, the extension direction X2 of the second connection part 3022 intersects with the extension direction (parallel to X1) of the first connection part 3042.

[0089] Combined with the first aspect, in some implementation manners of the first aspect, the extension direction X2 of the second connection part 3022 (such as Figure 5 the dotted line along the vertical direction shown) is parallel to the bending direction of the foldable area.

[0090] In this embodiment, by setting the extension direction of the second connection part 3022 to be parallel to the bending direction, the stress generated by bending can be distributed along the extension direction of the connection part instead of concentrating on a certain point. By optimizing the stress distribution, the touch panel can better maintain the integrity of its structure and function when bent, thereby improving the bending performance and durability.

[0091] Figure 7 It is a schematic diagram of the foldable area and adjacent areas of the touch panel according to an embodiment of the present invention.

[0092] In combination with the first aspect, in some implementations of the first aspect, such as Figure 7 As shown, the touch panel further includes a first non-foldable area and a second non-foldable area, which are located on opposite sides of the foldable area, and the arrangement directions of the first non-foldable area, the foldable area, and the second non-foldable area are parallel to the bending direction. When the foldable area is in a bent state, the first non-foldable area and the second non-foldable area are stacked.

[0093] In this embodiment, during the bending process, the touch panel will be subject to certain stresses. The existence of the first non-foldable area and the second non-foldable area can optimize the stress distribution, reduce the stress concentration in the foldable area, and thus reduce the risk of damage to the touch panel. Specifically, during the bending process, the touch panel will be subject to complex stress actions, including stretching, compression, and bending, etc. The first non-foldable area and the second non-foldable area, as fixed parts, can limit the deformation range of the touch panel during bending, thereby enhancing the structural stability. At the same time, these two areas can also serve as stress dispersion areas to evenly distribute the stress on the touch panel, reducing stress concentration and the risk of damage.

[0094] In combination with the first aspect, in some implementations of the first aspect, such as Figure 5 and Figure 6 As shown, the extension direction X2 of the second connecting portion 3022 intersects with the extension direction X3 of the first portion 3041, and the extension direction X2 of the second connecting portion 3022 intersects with the extension direction X4 of the second portion 3043.

[0095] In this embodiment, in order to optimize the performance of the touch panel during bending, setting the extension direction of the second connecting portion 3022 to intersect with the extension directions of the first portion 3041 and the second portion 3043 can effectively disperse the stress generated during bending and avoid damage to the touch panel caused by stress concentration during bending.

[0096] Specifically, when the base layer 301 is subject to a bending force, the second conductive circuit 304 can deform along with the deformation of the base layer. The design that the extension direction of the second connecting portion 3022, as a bridge connecting the first portion 3041 and the second portion 3043, intersects with the extension directions of these two portions enables the stress to be more evenly distributed on the entire second conductive circuit 304. In this way, even if the touch panel is subject to a large stress during the bending process, damage caused by excessive local stress can be avoided by dispersing the stress.

[0097] In combination with the first aspect, in some implementations of the first aspect, the orthographic projection of the second connecting portion 3022 on the base layer 301 is located within the orthographic projection of the first connecting portion 3042 on the base layer 301.

[0098] In this embodiment, by limiting the second connecting portion 3022 within the range where the first connecting portion 3042 is located, and the first connecting portion 3042 enclosing the second connecting portion 3022, the bending resistance of the first connecting portion 3042 corresponding to the first insulating layer 303 can be improved, and the risk of fracture of the first insulating layer 303 corresponding to the second connecting portion 3022 during the bending process can be avoided.

[0099] Combined with the first aspect, in some implementation manners of the first aspect, at least part of the orthographic projection of the first part 3021 on the base layer 301 does not overlap with the orthographic projection of the first connecting portion 3042 on the base layer, and at least part of the orthographic projection of the second part 3023 on the base layer 301 does not overlap with the orthographic projection of the first connecting portion 3022 on the base layer 301.

[0100] In this embodiment, by limiting at least part of the first part 3021 and part of the second part 3023 outside the projection range of the first connecting portion 3042, the stress of the first insulating layer 303 corresponding to the inflection point region of the second connecting portion 3022 (i.e., the region where both ends of the second connecting portion 3022 are located) can be dispersed, and the stress concentration in the inflection point region of the second connecting portion 3022 from damaging the first insulating layer 303 can be avoided.

[0101] Combined with the first aspect, in some implementation manners of the first aspect, the extending direction X3 of the first part 3021 is parallel to the extending direction X4 of the second part 3023.

[0102] In this embodiment, the central axes of the first part 3021 and the second part 3023 of the first conductive line 302 are parallel but not coaxial. That is, when the first conductive line 302 is translated a small distance in the direction perpendicular to its extending direction, stress concentration can be avoided. Specifically, when the touch panel is bent, the foldable area will be subjected to greater stress. If the first conductive line 302 and the second conductive line 304 directly intersect at the bridge point without any adjustment, then these intersection points (i.e., the bridge points) will become stress concentration regions, increasing the risk of line fracture. By translating a small distance in the vertical direction, these stresses can be dispersed, improving the durability and reliability of the line. Further, the central axis of the second connecting portion 3022 is inclined to the central axes of the first part 3021 and the second part 3023, which can avoid stress concentration at the turning point, and distribute the stress on the second connecting portion 3022 as much as possible, further reducing the risk of line fracture.

[0103] In addition, the first conductive line 302 can be translated a short distance perpendicular to its extension direction to maintain the line spacing. Specifically, in the foldable area, due to the bending of the panel, the spacing between originally parallel lines may change. If the spacing is too small, electrical interference or short circuit between the lines may occur. By translating the lines, it can be ensured that the spacing between the lines is always kept within a safe range during the bending process, thereby avoiding electrical problems (e.g., electrical interference or short circuit).

[0104] Figure 8 is a schematic diagram of a top view of a bridge point of a touch layer of a touch panel according to another embodiment of the present invention, Figure 9 FIG. 1 is a schematic diagram of a partial top view of the touch layer of a touch panel according to an embodiment of the present invention.

[0105] In combination with the first aspect, in some implementations of the first aspect, such as Figure 8 and Figure 9 As shown, the width l2 of the first connecting portion 3042 is greater than the width l1 of the first sub-portion 3041, and the width l2 of the first connecting portion 3042 is greater than the width l3 of the second sub-portion 3043, which can further disperse the stress at the bridging node and reduce the risk of damage to the first insulating layer 303 due to stress concentration during bending.

[0106] In combination with the first aspect, in some implementations of the first aspect, the orthographic projection of the second connection portion 3022 on the base layer 301 is located within the orthographic projection of the first connection portion 3042 on the base layer 301, and the orthographic projection area of ​​the second connection portion 3022 on the base layer 301 is smaller than the orthographic projection area of ​​the first connection portion 3042 on the base layer 301. That is, by enveloping the second connection portion 3022 with the first connection portion 3042, the stress on the first insulating layer 303 in the corresponding areas of the first connection portion 3042 and the second connection portion 3022 is dispersed, thereby reducing the risk of the first insulating layer 303 being damaged due to stress concentration during bending.

[0107] In combination with the first aspect, in some implementations of the first aspect, such as Figure 8 As shown, cutting along AA can obtain Figure 4 View shown.

[0108] In combination with the first aspect, in some implementations of the first aspect, the first connection portion 3042 is rectangular in shape.

[0109] In combination with the first aspect, in some implementations of the first aspect, the first connection portion 3042 is square in shape.

[0110] Figure 10 3 is a schematic diagram of a partial top view of a touch layer of a touch panel according to another embodiment of the present invention. For example, the shape of the first connecting portion 3042 is a rectangle, such as a square.

[0111] In combination with the first aspect, in some implementations of the first aspect, as Figure 10 shown in, at least some vertices 3045 of the first connecting portion 3042 are located within the orthographic projection of the first portion 3021, the second portion 3023, or the first conductive line 302b on the base layer 301. At least some vertices 3045 of the first connecting portion 3042 are located within the orthographic projection of the first portion 3021 on the base layer 301. At least some vertices 3045 of the first connecting portion 3042 are located within the orthographic projection of the first portion 3023 on the base layer 301.

[0112] In this embodiment, by setting the vertex 3045 of the first connecting portion 3042 within the projection range of the first conductive line 302b, it is possible to avoid stress concentration at the vertex 3045 of the first connecting portion 3042 during bending and damaging the first insulating layer 303.

[0113] In combination with the first aspect, in some implementations of the first aspect, the first connecting portion 3042 includes a first side 3044, and the vertices 3045 at both ends of the first side 3044 are located within the orthographic projection of the first conductive line 302 on the base layer 301, and the extending direction of the first side 3044 is perpendicular to the bending direction of the foldable area.

[0114] In this embodiment, by defining the first side 3044 and the vertex 3045 of the first connecting portion 3042, it is possible to further disperse the stress during bending of the touch panel, prevent excessive stress concentration in the vertex 3045 area from damaging the first insulating layer 303 in the corresponding area, and improve the anti-bending performance of the touch panel.

[0115] Figure 11 It is a partial top view structural schematic diagram of the touch layer of the touch panel according to another embodiment of the present invention.

[0116] In combination with the first aspect, in some implementations of the first aspect, as Figure 11 shown, the width l2 of the first connecting portion 3042 is greater than the width l1 of the first sub-portion 3041, and the width l2 of the first connecting portion 3042 is greater than the width l3 of the second sub-portion 3043. The first conductive line includes a first portion 3021, a second connecting portion 3022, and a second portion 3023 connected in sequence, and the orthographic projection of the first connecting portion 3042 on the base layer 301 is located within the orthographic projection of the second connecting portion 3022 on the base layer 301; the orthographic projection area of the first connecting portion 3042 on the base layer is smaller than the orthographic projection area of the second connecting portion 3022 on the base layer.

[0117] In this embodiment, by defining the second connection portion 3022 of the first conductive line 302, and using the second connection portion 3022 to envelope the first connection portion 3042, the strength of the first insulating layer 303 in the corresponding regions of the first connection portion 3042 and the second connection portion 3022 is increased, and the stress distribution of the first insulating layer 303 in this region is dispersed, thereby reducing the risk of the first insulating layer 303 being damaged due to stress concentration during bending.

[0118] Combined with the first aspect, in some implementation manners of the first aspect, the width l5 of the second connection portion 3022 is greater than the width l4 of the first portion 3021, and the width l5 of the second connection portion 3022 is greater than the width l6 of the second portion 3023.

[0119] In this embodiment, by optimizing and defining the width of the second connection portion 3022, when the touch panel is bent, the stress caused by the bending is dispersed on the first conductive line 302, preventing the line from breaking due to stress concentration.

[0120] Combined with the first aspect, in some implementation manners of the first aspect, such as Figure 6 or Figure 9 as shown, the touch panel further includes: a first touch electrode block 305 and / or a second touch electrode block 306. A plurality of first touch electrode blocks 305 are arranged on the base layer 301, and two adjacent first touch electrode blocks 305 along the first direction x are connected by a first conductive line 302. A plurality of second touch electrode blocks 306 are arranged on the base layer 301, and two adjacent second touch electrode blocks 306 along the second direction y are connected by a second conductive line 304. Wherein, the first direction x and the second direction y intersect, for example, are perpendicular.

[0121] In this embodiment, a plurality of first touch electrode blocks 305 and the first conductive line 302 form a first electrode network, and a plurality of second touch electrode blocks 306 and the second conductive line 304 form a second electrode network. The first electrode network and the second electrode network are intertwined on the touch panel to jointly constitute a touch sensing area. When a touch object contacts or approaches the touch panel, a coupling capacitance will be formed with the electrode network, thereby changing the electric field distribution between the electrodes. This electric field change will be captured by the sensor inside the touch panel and converted into an electrical signal for transmission and processing.

[0122] For example, the touch panel further includes: a plurality of first touch electrodes extending along the first direction and arranged along the second direction. The first touch electrode includes a plurality of first touch electrode blocks arranged in the first direction x.

[0123] For example, the touch panel further includes: a plurality of second touch electrodes extending along the second direction and arranged along the first direction. The second touch electrode includes a plurality of second touch electrode blocks arranged in the second direction y.

[0124] In combination with the first aspect, in some implementations of the first aspect, one of the first touch electrode block 305 and the second touch electrode block 306 is a touch driving electrode block, and the other is a touch sensing electrode block.

[0125] In combination with the first aspect, in some implementations of the first aspect, one of the first touch electrode block 305 and the second touch electrode block 306 is located in the first conductive layer, and the other is located in the second conductive layer; or, the first touch electrode block 305 and the second touch electrode block 306 are located in the first conductive layer, or the first touch electrode block 305 and the second touch electrode block 306 are located in the second conductive layer.

[0126] In combination with the first aspect, in some implementations of the first aspect, such as Figure 5 and Figure 6 , or Figure 8 and Figure 9 as shown, the first touch electrode block 305 and the first conductive line 302 are located in the first conductive layer, represented by red lines (patterns), and the second touch electrode block 306 and the second conductive line 304 are located in the second conductive layer, represented by blue lines (patterns). Alternatively, the first touch electrode 305 and the first conductive line block 302 may also be located in the second conductive layer, and correspondingly, the second touch electrode block 306 and the second conductive line 304 are located in the first conductive layer.

[0127] In combination with the first aspect, such as Figure 10 or Figure 11 as shown, the first touch electrode block 305 and the first conductive line 302 are located in the first conductive layer, represented by red lines (patterns), the second touch electrode block 306 and a partial conductive line (extending from the second touch electrode block 306 and used to connect to the second conductive line 304) are located in the first conductive layer, represented by red lines (patterns), and the second conductive line 304 is located in the second conductive layer, represented by blue lines (patterns), where the orthographic projection of the second conductive line 304 on the base layer 301 overlaps with the orthographic projection of the partial conductive line extending from the second touch electrode block 306 on the base layer 301, and the second conductive line 304 and the partial conductive line extending from the second touch electrode block 306 are electrically connected through a via 307. Alternatively, the first touch electrode block 305 and the first conductive line 302 are located in the second conductive layer, the second touch electrode block 306 and a partial conductive line are located in the second conductive layer, and the second conductive line 304 is located in the first conductive layer.

[0128] In combination with the first aspect, in some implementations of the first aspect, such as Figure 10 or Figure 11As shown, the touch panel further includes: a plurality of first touch electrode blocks 305 disposed on the base layer 301, and two adjacent first touch electrode blocks 305 in the first direction are connected by a connection structure, and the connection structure includes at least one first conductive line 302 and at least one second conductive line 304 connected by a via 307 penetrating through the first insulating layer 303.

[0129] For example, as Figure 10 shown, the touch panel further includes: a plurality of second touch electrode blocks 306 disposed on the base layer 301, and two adjacent second touch electrodes 306 in the second direction are connected by at least one first conductive line 302; the first direction and the second direction intersect, for example, are perpendicular.

[0130] For example, as Figure 11 shown, the touch panel further includes: a plurality of second touch electrode blocks 306 disposed on the base layer 301, and two adjacent second touch electrodes 306 in the second direction are connected by at least one second conductive line 304 (such as 304a and / or 304b); the first direction and the second direction intersect, for example, are perpendicular.

[0131] In this embodiment, the connection structure connects the first conductive line 302 and the second conductive line 304 through the via 307. This design not only enhances the stability of the electrical connection, but also improves the structural strength of the touch panel. During the bending process, the touch panel can better maintain its integrity and functionality. In addition, adopting this setting can simplify the manufacturing process of the touch panel, reduce the complexity and uncertainty in the production process. By optimizing the connection structure and the layout of the touch electrodes, the production efficiency can be improved and the manufacturing cost can be reduced.

[0132] Combined with the first aspect, in some implementation manners of the first aspect, the first touch electrode block 305 and the second touch electrode block 306 are located in the first conductive layer, or the first touch electrode block 305 and the second touch electrode block 306 are located in the second conductive layer.

[0133] Combined with the first aspect, in some implementation manners of the first aspect, one of the first touch electrode block 305 and the second touch electrode block 306 is a touch driving electrode block, and the other is a touch sensing electrode block.

[0134] Combined with the first aspect, in some implementation manners of the first aspect, the first touch electrode block 305 and the second touch electrode block 306 are in a grid shape.

[0135] In this embodiment, the first touch electrode block 305 and the second touch electrode block 306 are in a grid shape, which can improve the light transmittance, enabling the electrode material to maintain good electrical conductivity while occupying a smaller area, thereby allowing more light to pass through the touch panel and improving the light transmittance and clarity of the touch panel. In addition, it can also enhance durability. Compared with traditional ITO (indium tin oxide) electrodes, the grid-shaped electrodes are more resistant to physical stresses such as bending and pressing, and are particularly suitable for flexible screens and folding screens, extending the service life of the touch panel.

[0136] Combined with the first aspect, in some implementation manners of the first aspect, the materials of the first touch electrode block 305 and the second touch electrode block 306 include metals, metal oxides or alloys.

[0137] Combined with the first aspect, in some implementation manners of the first aspect, the first direction is perpendicular to the second direction.

[0138] Combined with the first aspect, in some implementation manners of the first aspect, two adjacent first touch electrode blocks 305 along the first direction are connected by at least two first conductive lines 302; and / or, two adjacent second touch electrode blocks 306 along the second direction are connected by at least two second conductive lines 304.

[0139] For example, the first conductive layer is located between the base layer 301 and the second conductive layer, or the second conductive layer is located between the base layer 301 and the first conductive layer. The first conductive layer may include a metal layer. The second conductive layer may include a metal layer.

[0140] Optionally, the number of the first conductive lines 302 and the second conductive lines 304 is two, three, four or more.

[0141] In this embodiment, by providing more current channels between adjacent touch electrode blocks, the electrical conductivity between the touch electrodes is enhanced, which helps to ensure the stable transmission of touch signals and improve the sensitivity and accuracy of touch response. In addition, adjacent touch electrodes can also be connected by multiple lines to form a redundant conductive network. When the touch screen is bent and a certain line fails, other lines can still continue to work, thereby improving the reliability of the touch system.

[0142] Combined with the first aspect, in some implementation manners of the first aspect, the base layer 301 is a support layer structure or other auxiliary layer structure of the touch panel 3, providing a support carrier for the touch electrode blocks and the first insulating layer 303. Optionally, the base layer 301 is made of glass or plastic materials.

[0143] In combination with the first aspect, in some implementations of the first aspect, the materials of the first conductive line 302 and the second conductive line 3043 include metals (such as aluminum Al, magnesium Mg, calcium Ca, etc.), metal oxides (for example, ITO, indium tin oxide), transparent conductive polymers (for example, polyaniline, etc.), or alloys (such as Mg:Ag alloy, Li:Al alloy, etc.).

[0144] For example, the touch panel includes one or more line groups, and each line group includes a first conductive line and a second conductive line. For example, in the same line group, the orthographic projections of the first conductive line and the second conductive line on the base layer 301 overlap.

[0145] For example, the touch panel includes a first line group, and the first line group includes a first conductive line 302a and a second conductive line 304a. For example, a first insulating layer is provided at the overlapping position of the first conductive line 302a and the second conductive line 304a, and no vias are provided.

[0146] For example, the touch panel includes a second line group, and the second line group includes a first conductive line 302b and a second conductive line 304b. For example, a via 307 penetrating the first insulating layer is provided at the overlapping position of the first conductive line 302b and the second conductive line 304b.

[0147] For example, the touch panel includes a third line group, and the third line group includes a first conductive line 302c and a second conductive line 304c. For example, a first insulating layer is provided at the overlapping position of the first conductive line 302c and the second conductive line 304c, and no vias are provided.

[0148] For example, the touch panel includes a fourth line group, and the fourth line group includes a first conductive line 302d and a second conductive line 304d. For example, a via 307 penetrating the first insulating layer is provided at the overlapping position of the first conductive line 302d and the second conductive line 304d.

[0149] For example, the touch panel includes a fifth line group, and the fifth line group includes a first conductive line 302e and a second conductive line 304e.

[0150] For example, the touch panel includes a sixth line group, and the sixth line group includes a first conductive line 302f and a second conductive line 304f.

[0151] For example, the touch panel includes one or more of the first line group, the second line group, the third line group, the fourth line group, the fifth line group, and the sixth line group.

[0152] For example, adjacent first touch electrode blocks can be connected through one or more of the first line group, the second line group, the third line group, the fourth line group, the fifth line group, and the sixth line group.

[0153] For example, adjacent second touch electrode blocks can be connected by one or more of a first circuit group, a second circuit group, a third circuit group, a fourth circuit group, a fifth circuit group, and a sixth circuit group.

[0154] Figure 6 、 Figure 9 、 Figure 10 、 Figure 11 The touch electrode blocks are schematically shown in, and the size of the touch electrode blocks can be larger than that of the conductive lines, which is not limited herein.

[0155] The second aspect of the present invention provides a display device, including the touch panel as described in the above embodiments.

[0156] It should be noted that the display device can be various electronic display products, and specifically can include but is not limited to at least one of a mobile phone, a tablet computer, an e-book reader, a player, a digital camera, a laptop computer, a vehicle-mounted computer, a desktop computer, a set-top box, a smart TV, and a wearable device.

[0157] In addition, according to actual needs, the display device can further include other structures such as a substrate and a packaging layer. The display device can be an in-fold display device or an out-fold display device. The display device can be an in-fold display device, and when the display device is in a bent state, the display surface is located inside. Alternatively, the display device can be an out-fold display device, and when the display device is in a bent state, the display surface is located outside.

[0158] The display device can include a display function layer, and the touch panel (which can be a touch function layer) can be located on the display side of the display function layer.

[0159] Since the display device of the embodiment of the present application includes all the technical solutions of the above Figures 4 to 11 shown embodiments, it can at least achieve all the above technical effects, which will not be elaborated herein.

[0160] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A touch panel, characterized in that, including a foldable area, which is provided with: a base layer; a first conductive layer, including a first conductive circuit disposed on the base layer; a first insulating layer, located on the base layer; a second conductive layer, including a second conductive circuit located on the base layer, the second conductive circuit including a first sub - portion, a first connecting portion, and a second sub - portion connected in sequence, a positive projection of the first connecting portion on the base layer overlaps a positive projection of the first conductive circuit on the base layer, at least a part of the positive projection of the first sub - portion on the base layer is located outside the positive projection of the first conductive circuit on the base layer, and at least a part of the positive projection of the second sub - portion on the base layer is located outside the positive projection of the first conductive circuit on the base layer; wherein, the first insulating layer is located between the first conductive layer and the second conductive layer.

2. The touch panel according to claim 1, wherein The first conductive circuit includes a first part, a second connecting portion, and a second part connected in sequence, the arrangement directions of the first sub - portion, the first connecting portion, and the second sub - portion intersect the extending direction of the second connecting portion; a positive projection of the second connecting portion on the base layer overlaps a positive projection of the first connecting portion on the base layer; Preferably, the extending direction of the second connecting portion is parallel to the bending direction of the foldable area; Preferably, the touch panel further includes a first non - foldable area and a second non - foldable area, located on opposite sides of the foldable area, and the arrangement directions of the first non - foldable area, the foldable area, and the second non - foldable area are parallel to the bending direction; Preferably, the extending direction of the second connecting portion intersects the extending direction of the first part, and the extending direction of the second connecting portion intersects the extending direction of the second part; Preferably, at least a part of the positive projection of the second connecting portion on the base layer is located within the positive projection of the first connecting portion on the base layer; Preferably, at least a part of the positive projection of the first part on the base layer does not overlap the positive projection of the first connecting portion on the base layer, and at least a part of the positive projection of the second part on the base layer does not overlap the positive projection of the first connecting portion on the base layer; Preferably, the extending direction of the first part is parallel to the extending direction of the second part.

3. The touch panel according to claim 2, wherein the width of the first connecting portion is greater than the width of the first sub - portion, and the width of the first connecting portion is greater than the width of the second sub - portion; Preferably, the area of the positive projection of the second connecting portion on the base layer is smaller than the area of the positive projection of the first connecting portion on the base layer.

4. The touch panel according to claim 1, wherein The width of the first connecting portion is greater than the width of the first sub - portion, and the width of the first connecting portion is greater than the width of the second sub - portion; Preferably, the shape of the first connecting portion is rectangular; Preferably, the shape of the first connecting portion is square; Preferably, at least some vertices of the first connecting portion in the positive projection on the base layer are located within the positive projection of the first conductive circuit on the base layer; Preferably, the first connection part includes a first side, and the projections of the vertices at both ends of the first side on the base layer are located within the projection of the first conductive line on the base layer. The extending direction of the first side is perpendicular to the bending direction of the foldable area. Preferably, the touch panel further includes a first non-foldable area and a second non-foldable area, which are located on opposite sides of the foldable area, and the arrangement directions of the first non-foldable area, the foldable area, and the second non-foldable area are parallel to the bending direction.

5. The touch panel according to claim 1, wherein, The width of the first connection part is greater than the width of the first sub-part, and the width of the first connection part is greater than the width of the second sub-part. The first conductive line includes a first part, a second connection part, and a second part connected in sequence, and the projection of the first connection part on the base layer is located within the projection of the second connection part on the base layer. The projected area of the first connection part on the base layer is smaller than the projected area of the second connection part on the base layer. Preferably, the width of the second connection part is greater than the width of the first part, and the width of the second connection part is greater than the width of the second part.

6. The touch panel according to claim 1, wherein The touch panel further includes: A plurality of first touch electrode blocks are arranged on the base layer, and at least one of the first conductive lines is connected between two adjacent first touch electrode blocks in the first direction. A plurality of second touch electrode blocks are arranged on the base layer, and at least one of the second conductive lines is connected between two adjacent second touch electrode blocks in the second direction; the first direction and the second direction intersect. Preferably, one of the first touch electrode block and the second touch electrode block is a touch driving electrode block, and the other is a touch sensing electrode block. Preferably, one of the first touch electrode block and the second touch electrode block is located in the first conductive layer, and the other is located in the second conductive layer. Alternatively, the first touch electrode block and the second touch electrode block are located in the first conductive layer, or the first touch electrode block and the second touch electrode block are located in the second conductive layer.

7. The touch panel according to claim 1, wherein The touch panel further includes: A plurality of first touch electrode blocks are arranged on the base layer, and a connection structure is connected between two adjacent first touch electrode blocks in the first direction. The connection structure includes at least one of the first conductive lines and at least one of the second conductive lines connected through vias penetrating the first insulating layer. Preferably, the touch panel further includes: A plurality of second touch electrode blocks are arranged on the base layer, and at least one of the first conductive lines or at least one of the second conductive lines is connected between two adjacent second touch electrode blocks in the second direction; the first direction and the second direction intersect. Preferably, the first touch electrode block and the second touch electrode block are located in the first conductive layer, or the first touch electrode block and the second touch electrode block are located in the second conductive layer. Preferably, one of the first touch electrode block and the second touch electrode block is a touch driving electrode, and the other is a touch sensing electrode.

8. The touch panel according to claim 6 or 7, characterized in that, The first touch electrode block and the second touch electrode block are in a grid shape; Preferably, the materials of the first touch electrode block and the second touch electrode block include metal, metal oxide or alloy; Preferably, the first direction is perpendicular to the second direction.

9. The touch panel according to claim 6, wherein Two adjacent first touch electrode blocks along the first direction are connected by at least two first conductive lines; two adjacent second touch electrode blocks along the second direction are connected by at least two second conductive lines; And / or, the first conductive layer is located between the base layer and the second conductive layer, or the second conductive layer is located between the base layer and the first conductive layer.

10. A display device, characterized in that, It includes the touch panel according to any one of claims 1 to 9.

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