Touch panel and touch display device
By increasing the width of the second interval in the touch panel, the problem of bad short connection caused by foreign objects at the bridge points of the multi-layer touch panel is solved, and the effect of reducing product yield and improving signal response is achieved.
Patent Information
- Application Number
- CN202510430670.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-07-25
AI Technical Summary
When the multi-layer touch panel is produced using the 4Mask process, it is easy to cause poor short connection problems caused by foreign objects at the bridge points.
In the design of the touch panel, the second interval width between the first touch electrode block above the second conductive layer, the second touch electrode block and the second connecting portion is increased, and the problem of short-circuit failure is improved by increasing the width of the second interval to reduce the probability of foreign matter accumulation and increase the amount of foreign matter that can be accommodated.
By increasing the width of the second interval, the probability of foreign matter accumulation is reduced, the occurrence of short-circuit failure is reduced, the product yield loss rate is reduced by 10% to 20%, and has no effect on the degree of decomposition and Sensor program.
Smart Images
Figure CN120371159A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of touch display, and in particular, to a touch panel and a touch display device. Background Art
[0002] In order to reduce the process cost, a multi-layer touch panel currently mostly adopts a 4Mask (mask) process. Compared with the conventional process, the top protective layer, such as OC2 (the second optical adhesive layer) or SiON (silicon oxynitride inorganic protective layer), is reduced. During the process of lighting, appearance inspection, and polarizer lamination of the multi-layer touch panel, wiping or cleaning is often required. Due to the absence of the top protective layer, foreign matters are likely to accumulate at the bottom of the slope of the bridge point caused by OC1 (the first optical adhesive layer), ultimately resulting in a short circuit between the driving electrode and the sensing electrode. Summary of the Invention
[0003] The purpose of the embodiments of the present application is to provide a touch panel and a touch display device, so as to solve the problem that when a multi-layer touch panel is produced by a 4Mask process, foreign matters are likely to accumulate at the bridge point, resulting in poor short circuit. The specific technical solutions are as follows:
[0004] The first aspect of the present application provides a touch panel, including: a substrate; a plurality of first touch electrode blocks and a plurality of first connection portions, disposed on one side of the substrate and located in the touch area, the first connection portions being located in the first conductive layer, the first touch electrode blocks being located in the second conductive layer, the second conductive layer being located on the side of the first conductive layer away from the substrate, and two adjacent first touch electrode blocks in the same column being electrically connected through the first connection portions; a plurality of second touch electrode blocks and a plurality of second connection portions, disposed on one side of the substrate and located in the touch area, the second touch electrode blocks and the second connection portions both being located in the second conductive layer, and two adjacent second touch electrode blocks in the same row being electrically connected through the second connection portions, the first touch electrode blocks and the second touch electrode blocks being arranged in an alternating and staggered array along the row and column directions, and the orthographic projections of the first connection portions and the second connection portions on the substrate intersect; a first insulating layer, disposed between the first connection portions and the second connection portions that face each other up and down, the first insulating layer having two first side edges opposite to each other in the row direction and two second side edges opposite to each other in the column direction, the first side edges being located outside the respective side edges of the first connection portions opposite thereto, and the second side edges respectively overlapping with part of the adjacent first touch electrode blocks; there are a first gap and a second gap that communicate with each other between the first touch electrode blocks, the second touch electrode blocks, and the second connection portions, and the orthographic projection of the second gap on the substrate partially overlaps with the orthographic projection of the first insulating layer located outside the first connection portion, and the width of the second gap is greater than the width of the first gap; peripheral traces, located in the peripheral area, the peripheral area surrounding the touch area, and the peripheral traces are respectively electrically connected to the first touch electrode blocks and the second touch electrode blocks.
[0005] In some embodiments, the first gap includes a first section located between the first touch electrode block and the second touch electrode block, and a second section located between the first touch electrode block and the second connection portion, the second section including a first sub-section and a second sub-section, the second gap being located between the first sub-section and the second sub-section, the second gap including a first boundary on the same side as the first touch electrode block and a second boundary on the same side as the second connection portion, and at least part of at least one of the first boundary and the second boundary is not collinear with the boundary on the same side of the first sub-section and the second sub-section, so as to increase the width of the second gap.
[0006] In some embodiments, a part of the first side edge of the first insulating layer falls into the second gap, or a part of the first side edge and a part of the second side edge of the first insulating layer respectively fall into the second gap.
[0007] In some embodiments, a part of the first side edge and the second side edge respectively fall within the second interval. The second interval includes a first groove wall and a second groove wall that do not overlap with the first insulating layer. The first groove wall faces the first side edge, and the second groove wall faces the second side edge. The distance between the first groove wall and the first side edge is 10 micrometers to 20 micrometers, and the distance between the second groove wall and the second side edge is 15 micrometers to 30 micrometers.
[0008] In some embodiments, along the direction of the row, the length of the first sub-segment between the second interval and the first section is 8 micrometers to 20 micrometers.
[0009] In some embodiments, the first interval includes a first section located between the first touch electrode block and the second touch electrode block, and a second section located between the first touch electrode block and the second connection portion. The second interval is located between the first section and the second section. The second interval includes a first boundary on the same side as the first touch electrode block and a second boundary on the same side as the second connection portion. At least one of the first boundary and the second boundary is a broken line segment, and the folding point of the broken line segment is located outside the connection line of the end of the first section and the end of the second section.
[0010] In some embodiments, the first section is disposed opposite to the corner of the first insulating layer.
[0011] In some embodiments, the width of the second interval along the direction of the row is 20 micrometers to 40 micrometers, and the depth of the second interval along the direction of the column is 40 micrometers to 80 micrometers.
[0012] In some embodiments, the first conductive layer and the second conductive layer are transparent conductive layers, and the peripheral trace is a metal trace.
[0013] The second aspect of the present application provides a touch display device, and the touch display device includes the touch panel described above. The touch panel includes: a substrate; a plurality of first touch electrode blocks and a plurality of first connection parts, disposed on the light-emitting side of the substrate and located in the touch area, the first connection parts are located in the first conductive layer, the first touch electrode blocks are located in the second conductive layer, the second conductive layer is located on the side of the first conductive layer away from the substrate, and two adjacent first touch electrode blocks in the same column are electrically connected through the first connection parts; a plurality of second touch electrode blocks and a plurality of second connection parts, disposed on the light-emitting side of the substrate and located in the touch area, both the second touch electrode blocks and the second connection parts are located in the second conductive layer, and two adjacent second touch electrode blocks in the same row are electrically connected through the second connection parts, the first touch electrode blocks and the second touch electrode blocks are alternately arranged in a staggered array along the row and column directions, and the orthographic projections of the first connection parts and the second connection parts on the substrate intersect; a first insulating layer, disposed between the first connection parts and the second connection parts that face each other up and down, the first insulating layer has two first side edges opposite to each other along the row direction and two second side edges opposite to each other along the column direction, the first side edges are located outside the respective side edges of the first connection parts opposite thereto, and the second side edges respectively overlap with adjacent first touch electrode blocks; there are a first interval and a second interval that communicate with each other between the first touch electrode blocks, the second touch electrode blocks and the second connection parts, the orthographic projection of the second interval on the substrate partially overlaps with the orthographic projection of the first insulating layer located outside the first connection parts, and the width of the second interval is greater than that of the first interval; peripheral traces, located in the peripheral area, the peripheral area surrounds the touch area, and the peripheral traces are respectively electrically connected to the first touch electrode blocks and the second touch electrode blocks.
[0014] In some embodiments, a color filter layer is provided on the light-incident side of the substrate.
[0015] Advantageous effects of the embodiments of the present application:
[0016] For the touch panel and the touch display device provided by the embodiments of the present application, the touch panel is manufactured by a 4Mask process, and the protective layer is omitted above the second conductive layer, which can reduce the manufacturing cost. Moreover, the width of the second interval between the first touch electrode blocks above the first insulating layer, the second touch electrode blocks and the second connection parts is increased to improve the short-circuit defect caused by foreign matter accumulation, and it has no influence on the defogging degree and the Sensor program, and the product yield loss is reduced by 10% - 20%. By increasing the width of the second interval, on the one hand, the probability of foreign matter accumulation here can be reduced, and on the other hand, the amount of foreign matter accumulation that can be accommodated here is increased. Therefore, the short-circuit defect caused by foreign matter accumulation can be significantly improved.
[0017] Of course, it is not necessary for any product or method implementing the present application to achieve all of the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other embodiments based on these drawings.
[0019] Figure 1 A top view of a touch panel provided by an embodiment of the present application in one embodiment;
[0020] Figure 2 An isometric view of a touch panel provided by an embodiment of the present application in one embodiment;
[0021] Figure 3 A partial cross-sectional view of a touch panel provided by an embodiment of the present application;
[0022] Figure 4 A partial bottom view of a touch panel provided by an embodiment of the present application in one embodiment, in which the first insulating layer is shown in a perspective view;
[0023] Figure 5 For Figure 4 a cross-sectional view along B-B' in
[0024] Figure 6 For Figure 4 a cross-sectional view along C-C' in
[0025] Figure 7 A partial bottom view of a touch panel provided by an embodiment of the present application in another embodiment, in which the first insulating layer is shown in a perspective view;
[0026] Figure 8 A partial bottom view of a touch panel provided by an embodiment of the present application in yet another embodiment, in which the first insulating layer is shown in a perspective view.
[0027] The reference numerals are as follows: touch area AA; peripheral area NA; substrate 100; light-emitting side 100a; light-incident side 100b; first conductive layer 200; first connection portion 201; first insulating layer 300; first side 301; second side 302; second conductive layer 400; first touch electrode block 401; first overlapping electrode 401a; second touch electrode block 402; second overlapping electrode 402a; second connection portion 403; first interval 501; first section 5011; second section 5012; first sub-section 50121; second sub-section 50122; second interval 502; first boundary 5021; second boundary 5022; first groove wall 50201; second groove wall 50202; peripheral trace 600; first trace 601; second trace 602; second insulating layer 700; bonding electrode 800; length L1 of the first sub-section; first direction X; second direction Y; third direction Z; folding point S; foreign object M. Detailed implementation manners
[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the protection scope of the present application.
[0029] In the first aspect of the embodiments of the present application, a touch panel is provided, as Figure 1 and Figure 2As shown in the figure, the touch panel includes a substrate 100, a plurality of first touch electrode blocks 401 and a plurality of first connection parts 201 disposed on one side of the substrate 100, a plurality of second touch electrode blocks 402 and a plurality of second connection parts 403, and a peripheral trace 600. The plurality of first touch electrode blocks 401 and the plurality of first connection parts 201 are located in the touch area AA. The first connection parts 201 are located in the first conductive layer 200, and the first touch electrode blocks 401 are located in the second conductive layer 400. The second conductive layer 400 is located on the side of the first conductive layer 200 away from the substrate 100. Adjacent two first touch electrode blocks 401 in the same column are electrically connected through the first connection parts 201. The plurality of second touch electrode blocks 402 and the plurality of second connection parts 403 are located in the touch area AA. The second touch electrode blocks 402 and the second connection parts 403 are both located in the second conductive layer 400. Adjacent two second touch electrode blocks 402 in the same row are electrically connected through the second connection parts 403. The first touch electrode blocks 401 and the second touch electrode blocks 402 are arranged in an alternating and staggered array in the row and column directions. The orthographic projections of the first connection parts 201 and the second connection parts 403 on the substrate 100 intersect. A first insulating layer 300 is provided between the upper and lower opposite first connection parts 201 and second connection parts 403. The first insulating layer 300 has two first side edges 301 opposite in the row direction and two second side edges 302 opposite in the column direction. The first side edges 301 are located outside the respective side edges of the first connection parts 201 opposite thereto. The second side edges 302 respectively overlap with partial adjacent first touch electrode blocks 401. There are mutually connected first intervals 501 and second intervals 502 between the first touch electrode blocks 401 and the second touch electrode blocks 402 and the second connection parts 403. The orthographic projection of the second interval 502 on the substrate overlaps with the orthographic projection part of the first insulating layer 300 located outside the first connection parts 201 on the substrate 100. The width of the second interval 502 is greater than that of the first interval 501. The peripheral trace 600 is located in the peripheral area NA. The peripheral area NA surrounds the touch area AA. The peripheral trace 600 is electrically connected to the first touch electrode blocks 401 and the second touch electrode blocks 402 respectively.
[0030] One of the first touch electrode blocks 401 and the second touch electrode blocks 402 is a driving electrode, and the other is a sensing electrode. When the first touch electrode block 401 is the driving electrode, the second touch electrode block 402 is the sensing electrode.
[0031] To clearly describe the relationship between the first touch electrode blocks 401 and the second touch electrode blocks 402, the row direction is defined as the first direction X, and the column direction is defined as the second direction Y. In this application, the row or column direction is relative and does not constitute a limitation to this application.
[0032] In the first direction X, a plurality of first touch electrode blocks 401 in the same row are arranged at intervals. Adjacent two second touch electrode blocks 402 in the same row are connected as a whole through a second connection part 403. In the second direction Y, adjacent two first touch electrode blocks 401 in the same column are connected in series through a first connection part 201, and a plurality of second touch electrode blocks 402 in the same column are arranged at intervals. The first touch electrode blocks 401 and the second touch electrode blocks 402 are alternately and staggeredly arranged in the first direction X and the second direction Y to form a grid shape. To improve the arrangement density of the first touch electrode blocks 401 and the second touch electrode blocks 402, preferably, the first touch electrode blocks 401 and the second touch electrode blocks 402 are diamond-shaped blocks, and two nearest first touch electrode blocks 401 and two second touch electrode blocks 402 form a larger diamond-shaped block. The orthographic projections of the first connection part 201 and the second connection part 403 on the substrate base plate 100 cross, and preferably, they can be vertically crossed. In this way, the first connection part 201 straddles the second connection part 403 and is electrically connected to the first touch electrode block 401.
[0033] The first conductive layer 200 is disposed in the touch area AA of the substrate base plate 100 and includes a plurality of first connection parts 201 arranged at intervals of 500. The first connection part 201 is used to electrically connect two adjacent first touch electrode blocks 401 in the same column. The first touch electrode blocks 401 are connected in series along the second direction Y through the first connection part 201. In this way, a path is formed by the first touch electrode blocks 401 along the second direction Y, and a path is formed by the second touch electrode blocks 402 along the first direction X. The two are arranged perpendicular to each other, which is convenient for controlling on both sides of the touch panel respectively, helps to relieve the wiring pressure in the peripheral area NA, and thus reduces the wiring difficulty in the peripheral area NA. The peripheral trace 600 is located in the peripheral area NA and can be fabricated after patterning the first conductive layer 200. The peripheral trace 600 uses a metal trace, such as copper, aluminum, molybdenum, or a composite trace of one or two or even three of them. Compared with ITO or IZO traces, it has better conductivity, which is beneficial to reducing resistance and improving the signal response speed and accuracy.
[0034] As Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, a first insulating layer 300 is disposed above the first conductive layer 200. The first insulating layer 300 can be a transparent optical adhesive layer, such as OC adhesive. The first insulating layer 300 is used for insulating between the first connection portion 201 and the second connection portion 403, so that the first connection portion 201 can electrically connect two adjacent first touch electrode blocks 401 across the second connection portion 403. And the first connection portion 201 is disposed below the second connection portion 403. Since the width of the second connection portion 403 is narrower than that of the second touch electrode block 402, the crossing width of the first connection portion 201 is smaller. The first insulating layer 300 only needs to insulate between the first connection portion 201 and the second connection portion 403, and does not need to extend to the second touch electrode block 402, which is beneficial to reducing the setting area of the first connection portion 201 and the first insulating layer 300 and is more convenient for electrically connecting with the first touch electrode block 401. Two first side edges 301 of the first insulating layer 300 are located outside the respective side edges of the first connection portion 201 opposite thereto, that is, each first side edge 301 respectively extends beyond the side edge of the first connection portion 201 on the same side. By making the width of the first insulating layer 300 in the first direction X greater than the width of the first connection portion 201, the first connection portion 201 can be better wrapped, and the insulation effect between the first connection portion 201 and the second touch electrode block 402 and the second connection portion 403 can be improved. At the same time, the second side edges 302 of the first insulating layer 300 respectively overlap with parts of the adjacent first touch electrode blocks 401, so that the second side edges of the first insulating layer 300 do not fall into the first gap 501 between the first touch electrode block 401 and the second touch electrode block 402 and the second connection portion 403, and the risk of foreign matter M accumulating around the second side edges 302 can be reduced. Because, if the second side edges 302 fall into the first gap 501, due to the relatively large thickness of the first insulating layer 300, the first gap 501 will form a stepped shape, and it is easy to accumulate in the stepped first gap during subsequent wiping or cleaning processes.
[0035] As Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, since the thickness of the first insulating layer 300 is much greater than that of the first conductive layer 200. For example, the thickness of the first conductive layer 200 is about 40 nanometers to 150 nanometers, and the thickness of the first insulating layer 300 is about 1500 nanometers. Therefore, when depositing the second conductive layer 400 above the first insulating layer 300, a climbing phenomenon of the second conductive layer 400 will occur at the peripheral position of the first insulating layer 300, forming a bridge point corresponding to the boundary region of the first insulating layer 300. During the wiping or cleaning process, foreign matter M is likely to accumulate in the bridge point area, resulting in a short-circuit defect. In the embodiment of the present application, by increasing the distance between the first touch electrode block 401 located outside the first connection portion 201 and the second touch electrode block 402 and the second connection portion 403, that is, increasing the size of the second gap 502, the foreign matter M entering the first gap 501 can smoothly pass through the edge region of the first insulating layer 300 without getting stuck in the second gap 502, thereby improving the problem that foreign matter M is likely to accumulate at this position, and thus improving the short-circuit defect caused by the accumulation of foreign matter M, and having no impact on the shadow elimination degree and the Sensor program, reducing the product yield loss by 10% to 20%. By increasing the width of the second gap 502, the distance between the first touch electrode block 401 and the second touch electrode block 402 and / or between the first touch electrode block and the second connection portion 403 is increased. On the one hand, the probability of foreign matter M accumulating here can be reduced, and on the other hand, the amount of foreign matter M that can be accommodated in the accumulated state here is increased. Therefore, the short-circuit defect caused by the accumulation of foreign matter M can be significantly improved.
[0036] It should be noted that the thickness here refers to the dimension in the third direction Z of the touch panel, and the third direction Z is perpendicular to the first direction X and the second direction Y.
[0037] Among them, the first conductive layer 200 and the second conductive layer 400 can be transparent conductive layers, such as ITO (indium tin oxide) or IZO (indium zinc oxide), etc., or can be metal conductive layers, such as metals or alloys such as copper, molybdenum, and aluminum. When the first conductive layer 200 and the second conductive layer 400 are metal conductive layers, the first touch electrode block 401 and the second touch electrode block 402 are generally in a grid shape.
[0038] Optionally, the peripheral trace 600 includes a first trace 601 and a second trace 602. The first touch electrode block 401 and the first trace 601 are electrically connected through a via of the first overlapping electrode 401a in the peripheral area NA. The second touch electrode block 402 and the second trace 602 are electrically connected through a via of the second overlapping electrode 402a in the peripheral area NA. The first trace 601 of the peripheral trace 600 is electrically connected to the first touch electrode block 401 for inputting a signal to the first touch electrode block 401. The second trace 602 is electrically connected to the second touch electrode block 402 for inputting a signal to the second touch electrode block 402. The peripheral area NA further includes a plurality of bonding electrodes 800, and the first trace 601 and the second trace 602 are respectively electrically connected to the corresponding bonding electrodes 800.
[0039] By increasing the width of the second interval 502, the orthographic projection of the second interval 502 on the substrate 100 overlaps with the orthographic projection of the first insulating layer 300 located outside the first connection portion 201 on the substrate 100. That is, a part of the side of the first insulating layer 300 located above the first insulating layer 300 and not overlapping with the first connection portion 201 falls into the second interval 502. The part of the side falling into the second interval 502 may be a part of the first side 301 of the first insulating layer 300 falling into the second interval 502; it may also be a part where the first side 301 and the second side 302 intersect and falls into the second interval 502. That is, the four corners of the first insulating layer 300 respectively fall into the second interval 502.
[0040] Optionally, as Figure 4 shown, the second interval 502 may be provided with one, two, three, four or even more, etc. The second interval 502 is provided with four, that is, two are provided on each side of the first connection portion 201 and are arranged at intervals. It is inevitable that foreign matter M will enter the first interval 501 during wiping and cleaning and advance along the first interval 501 until it is blocked by the first insulating layer 300. By widening the area near the first insulating layer 300 before and / or after it, a second interval 502 with a larger width is formed, which can effectively prevent the foreign matter M from getting stuck when it moves forward to the vicinity of the first insulating layer 300, thereby improving the accumulation of the foreign matter M.
[0041] In some embodiments of the present application, the first interval 501 includes a first section 5011 located between the first touch electrode block 401 and the second touch electrode block 402, and a second section 5012 located between the first touch electrode block 401 and the second connection portion 403. The second section 5012 includes a first sub-section 50121 and a second sub-section 50122. The second interval 502 is located between the first sub-section 50121 and the second sub-section 50122. The second interval 502 includes a first boundary 5021 on the same side as the first touch electrode block 401 and a second boundary 5022 on the same side as the second connection portion 403. At least a part of at least one of the first boundary 5021 and the second boundary 5022 is non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122, so as to increase the width of the second interval 502.
[0042] In this embodiment, as Figure 4 , Figure 7 shown, the second interval 502 is provided on the second connection portion 403. At least a part of at least one of the first boundary 5021 and the second boundary 5022 being non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122 means that the first boundary 5021 is non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122, or the second boundary 5022 is non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122, or the first boundary 5021 and the second boundary 5022 are respectively non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122. As Figure 7 shown, when the first boundary 5021 is non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122, that is, the first boundary 5021 is recessed into the interior of the first touch electrode block 401. As Figure 4 shown, when the second boundary 5022 is non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122, that is, the second boundary 5022 is recessed into the interior of the second connection portion 403. When the first boundary 5021 and the second boundary 5022 are respectively non-collinear with the boundary on the same side of the first sub-section 50121 and the second sub-section 50122, the first boundary 5021 is recessed into the interior of the first touch electrode block 401, and the second boundary 5022 is recessed into the interior of the second connection portion 403.
[0043] Through the above settings, the distance between the first touch electrode block 401 and the second connection portion 403 is widened, that is, the width of the second interval 502 is widened. On the one hand, the probability of foreign object M accumulating here can be reduced. On the other hand, the accumulation amount of foreign object M that can be accommodated here is increased. Therefore, the short-circuit defect caused by the accumulation of foreign object M can be significantly improved.
[0044] In some embodiments of the present application, as Figure 4As shown, a part of the first side 301 of the first insulating layer 300 falls within the second interval 502, or, as Figure 7 shown, a part of the first side 301 and the second side 302 of the first insulating layer 300 respectively fall within the second interval 502.
[0045] As Figure 4 shown, a part of the first side 301 falls within the second interval 502, widening the distance between the first touch electrode block 401 and the second connection part 403. On the one hand, it can reduce the probability of foreign matter M accumulating here, and on the other hand, it can increase the amount of foreign matter M that can be accommodated here. Therefore, it can significantly improve the short - circuit defect caused by the accumulation of foreign matter M.
[0046] As Figure 7 shown, a part of both the first side 301 and the second side 302 fall within the second interval 502, that is, the corner position of the first insulating layer 300 falls within the corresponding second interval 502, widening the distance between the first touch electrode block 401 and the second connection part 403. On the one hand, it can reduce the probability of foreign matter M accumulating here, and on the other hand, it can increase the amount of foreign matter M that can be accommodated here. Therefore, it can significantly improve the short - circuit defect caused by the accumulation of foreign matter M. And because the corner position falls within the second interval 502, it no longer blocks foreign matter M outside the first side 301 and the second side 302 of the first insulating layer 300. Therefore, it can better avoid the accumulation of foreign matter M here and can further improve the short - circuit defect caused by the accumulation of foreign matter M.
[0047] For the case where a part of the first side 301 and the second side 302 respectively fall within the second interval 502, as Figure 7 and Figure 8 shown, the second interval 502 includes a first groove wall 50201 and a second groove wall 50202 that do not overlap with the first insulating layer 300. The first groove wall 50201 is opposite to the first side 301, and the second groove wall 50202 is opposite to the second side 302. Among them, for the Figure 7 shown embodiment, both the first groove wall 50201 and the second groove wall 50202 are part of the first boundary 5021. For the Figure 8 shown embodiment, the first groove wall 50201 is part of the second boundary 5022, and the second groove wall 50202 is part of the first boundary 5021. The distance between the first groove wall 50201 and the first side 301 is 10 μm to 20 μm, for example, it can be 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, etc. The distance between the second groove wall 50202 and the second side 302 is 15 μm to 30 μm, for example, it can be 15 μm, 20 μm, 25 μm, 28 μm, 30 μm, etc.
[0048] The distance between the first groove wall 50201 and the first side 301 is 10 to 20 micrometers, which increases the opening range of the second interval 502, making it difficult for the foreign object M to accumulate. The distance between the second groove wall 50202 and the second side 302 is 15 to 30 micrometers, which broadens the opening range where the second interval 502 is not blocked by the boundary of the first insulating layer 300, preventing the foreign object M from blocking here and reducing the possibility of short circuit caused by the accumulation of the foreign object M.
[0049] Optionally, along the row direction, that is, the first direction X, the length L1 of the first sub-segment between the second interval 502 and the first section 5011 is 8 to 20 micrometers, for example, it can be 8 micrometers, 10 micrometers, 15 micrometers, 18 micrometers, 20 micrometers, etc. Since the first touch electrode block 401 and the second touch electrode block 402 are arranged in a diamond cross pattern, there is a certain angle between the first section 5011 and the second section 5012, and the length L1 of the first sub-segment between the second interval 502 and the first section 5011 is 8 to 20 micrometers, avoiding the corner between the first section 5011 and the second section 5012, which is beneficial to reducing the accumulation of the foreign object M.
[0050] In some embodiments of the present application, as Figure 8 shown, the first interval 501 includes a first section 5011 located between the first touch electrode block 401 and the second touch electrode block 402, and a second section 5012 located between the first touch electrode block 401 and the second connection part 403. The second interval 502 is located between the first section 5011 and the second section 5012. The second interval 502 includes a first boundary 5021 on the same side as the first touch electrode block 401 and a second boundary 5022 on the same side as the second connection part 403. At least one of the first boundary 5021 and the second boundary 5022 is a broken line, and the folding point S of the broken line is located outside the connection line of the end of the first section 5011 and the end of the second section 5012.
[0051] In this embodiment, the second interval 502 is located between the first section 5011 and the second section 5012, as Figure 8As shown, when the first boundary 5021 is a polyline segment or the second boundary 5022 is a polyline segment, and the folding point S of the polyline segment is disposed outside the connection line of the ends of the first section 5011 and the second section 5012, the distance between the first touch electrode block 401 and the second touch electrode block 402 and between the first touch electrode block 401 and the second connection portion 403 can be widened. Since the second interval 502 enlarges the opening area at the corner between the first section 5011 and the second section 5012, when wiping or cleaning the touch panel, the phenomenon of foreign matter M getting stuck at the corner can be reduced. On the one hand, the probability of foreign matter M accumulating here can be reduced, and on the other hand, the accumulation amount of foreign matter M that can be accommodated here can be increased. Therefore, the short-circuit defect caused by the accumulation of foreign matter M can be significantly improved. Among them, the positive projection of the first side 301 and / or the second side 302 of the first insulating layer 300 on the substrate 100 falls within the positive projection range of the second interval 502 on the substrate 100.
[0052] Optionally, as Figure 8 shown, the first section 5011 is disposed opposite to the corner of the first insulating layer 300.
[0053] In this embodiment, a second interval 502 is provided between the first section 5011 and the second section 5012, and the first section 5011 is disposed opposite to the corner of the first insulating layer 300, so that the corner of the first insulating layer 300 falls within the range of the second interval 502, that is, the positive projection of the corner on the substrate 100 is located within the positive projection of the second interval 502 on the substrate 100. A part of the second interval 502 is formed by the first boundary 5021 recessing inwardly into the interior of the first touch electrode block 401, and a part is formed by the second boundary 5022 recessing inwardly into the interior of the second touch electrode block 402. The direction of inward recessing is not limited to recessing along the second direction Y. Since the corner of the first insulating layer 300 falls within the range of the second interval 502, at the corner position, the foreign matter M can pass smoothly and will not be blocked by the first insulating layer 300. And because the second interval 502 increases the distance between the first touch electrode block 401 and the second touch electrode block 402, the risk of foreign matter M accumulating here is reduced, and the accumulation amount of foreign matter M that the second interval 502 can accommodate is significantly increased. Therefore, the short-circuit defect caused by the accumulation of foreign matter M can be significantly improved.
[0054] As Figure 4 、 Figure 7 and Figure 8As shown, the width of the second interval 502 in the row direction is 20 to 40 micrometers, for example, it can be 20 micrometers, 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, etc., and the depth of the second interval 502 in the column direction is 40 to 80 micrometers, for example, it can be 40 micrometers, 45 micrometers, 50 micrometers, 55 micrometers, 60 micrometers, 65 micrometers, 70 micrometers, 75 micrometers, 80 micrometers, etc.
[0055] The width of the second interval 502 is 20 to 40 micrometers, and the depth is 40 to 80 micrometers, which increases the distance between the first touch electrode block 401 and the second touch electrode block 402 or between the first touch electrode block 401 and the second connection part 403 in the horizontal and vertical directions, reducing the risk of short circuit caused by the accumulation of foreign matter M here.
[0056] In some embodiments of the present application, the touch panel further includes a second insulating layer 700, which is located in the peripheral area NA and is disposed on the side of the peripheral trace 600 away from the substrate 100. The second insulating layer 700 is used to protect the peripheral trace 600, for example, to protect the first trace 601 and the second trace 602. The second insulating layer 700 can be a transparent optical adhesive layer, such as OC glue.
[0057] In a second aspect of the present application, a touch display device is provided. The touch display device includes the touch panel described above. Among them, the touch panel includes a substrate 100, a plurality of first touch electrode blocks 401, a plurality of first connection portions 201, a plurality of second touch electrode blocks 402, a plurality of second connection portions 403, and peripheral traces 600 disposed on the light-emitting side 100a of the substrate 100. The plurality of first touch electrode blocks 401 and the plurality of first connection portions 201 are located in the touch area AA and are disposed on the light-emitting side 100a of the substrate 100. The first connection portions 201 are located in the first conductive layer 200, and the first touch electrode blocks 401 are located in the second conductive layer 400. The second conductive layer 400 is located on the side of the first conductive layer 200 away from the substrate 100. Adjacent two first touch electrode blocks 401 in the same column are electrically connected through the first connection portions 201. The plurality of second touch electrode blocks 402 and the plurality of second connection portions 403 are located in the touch area AA and are disposed on the light-emitting side 100a of the substrate 100. The second touch electrode blocks 402 and the second connection portions 403 are both located in the second conductive layer 400. Adjacent two second touch electrode blocks 402 in the same row are electrically connected through the second connection portions 403. The first touch electrode blocks 401 and the second touch electrode blocks 402 are arranged in an alternating and staggered array in the row and column directions. The orthographic projections of the first connection portions 201 and the second connection portions 403 on the substrate 100 intersect. A first insulating layer 300 is provided between the upper and lower opposite first connection portions 201 and second connection portions 403. The first insulating layer 300 has two first side edges 301 opposite in the row direction and two second side edges 302 opposite in the column direction. The first side edges 301 are located outside the respective side edges of the first connection portions 201 opposite thereto. The second side edges 302 respectively overlap with partial adjacent first touch electrode blocks 401. There are mutually communicating first intervals 501 and second intervals 502 between the first touch electrode blocks 401 and the second touch electrode blocks 402 and the second connection portions 403. The orthographic projection of the second interval 502 on the substrate overlaps with a part of the orthographic projection of the first insulating layer 300 located outside the first connection portion 201 on the substrate 100. The width of the second interval 502 is greater than that of the first interval 501. The peripheral traces 600 are located in the peripheral area NA. The peripheral area NA surrounds the touch area AA. The peripheral traces 600 are respectively electrically connected to the first touch electrode blocks 401 and the second touch electrode blocks 402.
[0058] In the touch display device of this embodiment, the touch panel included therein is fabricated by a 4Mask process. Compared with the conventional fabrication process, the protective layer above the second conductive layer 400 is omitted, resulting in significant cost advantages and better shadow elimination in the bridge point area. Moreover, since a second spacer 502 is provided near the bridge point area and the width of the second spacer 502 is greater than that of the first spacer 501, foreign matter M entering the first spacer 501 can smoothly pass through the edge area of the first insulating layer 300 without getting stuck in the second spacer 502, thereby improving the problem that foreign matter M is prone to accumulate at this position, improving the short-circuit defect problem caused by the accumulation of foreign matter M, having no impact on the shadow elimination degree and the Sensor program, being able to effectively reduce the short-circuit defect caused by the accumulation of foreign matter M, and reducing the good product loss rate by 10% - 20%.
[0059] It should be noted that the light-emitting side 100a of the substrate 100 is the side from which light can enter the external environment or another medium after passing through.
[0060] In some embodiments of the present application, a color filter layer (not shown in the figure) is provided on the light-incident side 100b of the substrate 100. In this way, the touch electrodes can be integrated on the back of the color filter substrate, that is, the touch panel is a multi-layer on-cell (MLOC) touch panel. The color filter layer and the touch layer share a substrate 100, which is beneficial to reducing production costs and reducing the thickness of the touch device.
[0061] The touch panel can also be used as an independent external module and is provided on the light-emitting side 100a of the display panel.
[0062] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.
[0063] Each embodiment in this specification is described in a related manner. The same or similar parts among the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized.
[0064] The foregoing are only the preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are all included in the protection scope of the present application.
Claims
1. A touch panel, characterized in that, Comprising: A substrate; A plurality of first touch electrode blocks and a plurality of first connection portions, provided on one side of the substrate and located in the touch area. The first connection portions are located in the first conductive layer, and the first touch electrode blocks are located in the second conductive layer. The second conductive layer is located on the side of the first conductive layer away from the substrate. Adjacent two first touch electrode blocks in the same column are electrically connected through the first connection portions; A plurality of second touch electrode blocks and a plurality of second connection portions, provided on one side of the substrate and located in the touch area. The second touch electrode blocks and the second connection portions are both located in the second conductive layer. Adjacent two second touch electrode blocks in the same row are electrically connected through the second connection portions. The first touch electrode blocks and the second touch electrode blocks are arranged in an alternating and staggered array along the row and column directions. The orthographic projections of the first connection portions and the second connection portions on the substrate intersect; A first insulating layer, provided between the upper and lower opposite first connection portions and second connection portions. The first insulating layer has two first side edges opposite to each other in the row direction and two second side edges opposite to each other in the column direction. The first side edges are located outside the respective side edges of the first connection portions opposite thereto. The second side edges respectively overlap with adjacent first touch electrode blocks; There are mutually communicating first intervals and second intervals between the first touch electrode blocks, the second touch electrode blocks and the second connection portions. The orthographic projection of the second interval on the substrate partially overlaps with the orthographic projection of the first insulating layer located outside the first connection portion on the substrate. The width of the second interval is greater than that of the first interval; Peripheral traces, located in the peripheral area. The peripheral area is arranged to surround the touch area. The peripheral traces are respectively electrically connected to the first touch electrode blocks and the second touch electrode blocks.
2. The touch panel according to claim 1, wherein, The first interval includes a first section located between the first touch electrode block and the second touch electrode block, and a second section located between the first touch electrode block and the second connection portion. The second section includes a first sub-section and a second sub-section. The second interval is located between the first sub-section and the second sub-section. The second interval includes a first boundary on the same side as the first touch electrode block and a second boundary on the same side as the second connection portion. At least part of at least one of the first boundary and the second boundary is not collinear with the boundary on the same side of the first sub-section and the second sub-section, so as to increase the width of the second interval.
3. The touch panel according to claim 1, wherein A part of the first side edge of the first insulating layer falls into the second interval, or a part of the first side edge and a part of the second side edge of the first insulating layer respectively fall into the second interval.
4. The touch panel according to claim 3, wherein, A part of the first side edge and the second side edge respectively fall into the second interval. The second interval includes a first groove wall and a second groove wall that do not overlap with the first insulating layer. The first groove wall faces the first side edge, and the second groove wall faces the second side edge. The distance between the first groove wall and the first side edge is 10 micrometers to 20 micrometers, and the distance between the second groove wall and the second side edge is 15 micrometers to 30 micrometers.
5. The touch panel according to claim 3, wherein In the direction of the row, the length of the first sub-segment between the second interval and the first section is 8 micrometers to 20 micrometers.
6. The touch panel according to claim 1, wherein The first interval includes a first section located between the first touch electrode block and the second touch electrode block, and a second section located between the first touch electrode block and the second connection portion. The second interval is located between the first section and the second section. The second interval includes a first boundary on the same side as the first touch electrode block and a second boundary on the same side as the second connection portion. At least one of the first boundary and the second boundary is a broken line segment, and the inflection point of the broken line segment is located outside the connection line of the end of the first section and the end of the second section.
7. The touch panel according to claim 6, wherein, The first section is disposed opposite to the corner of the first insulating layer.
8. The touch panel according to claim 6, wherein The width of the second interval in the direction of the row is 20 micrometers to 40 micrometers, and the depth of the second interval in the direction of the column is 40 micrometers to 80 micrometers.
9. The touch panel according to any one of claims 1-8, characterized in that The first conductive layer and the second conductive layer are transparent conductive layers, and the peripheral trace is a metal trace.
10. A touch display device, characterized in that, The display device includes the touch panel according to any one of claims 1-9, and the touch panel includes: A substrate. A plurality of first touch electrode blocks and a plurality of first connection portions are disposed on the light-emitting side of the substrate and located in the touch area. The first connection portions are located in the first conductive layer, and the first touch electrode blocks are located in the second conductive layer. The second conductive layer is located on the side of the first conductive layer away from the substrate. Adjacent two first touch electrode blocks in the same column are electrically connected through the first connection portion. A plurality of second touch electrode blocks and a plurality of second connection portions are disposed on the light-emitting side of the substrate and located in the touch area. The second touch electrode blocks and the second connection portions are both located in the second conductive layer. Adjacent two second touch electrode blocks in the same row are electrically connected through the second connection portion. The first touch electrode blocks and the second touch electrode blocks are arranged in an alternating and staggered array in the directions of the row and the column. The orthographic projections of the first connection portion and the second connection portion on the substrate intersect. A first insulating layer is disposed between the first connection portion and the second connection portion that are opposite to each other up and down. The first insulating layer has two first side edges opposite to each other in the direction of the row and two second side edges opposite to each other in the direction of the column. The first side edges are located outside the respective side edges opposite to the first connection portion, and the second side edges respectively overlap with adjacent first touch electrode blocks partially. There is a first gap and a second gap that communicate with each other between the first touch electrode block, the second touch electrode block, and the second connection portion. The positive projection of the second gap on the substrate substrate partially overlaps with the positive projection of the first insulating layer located outside the first connection portion on the substrate substrate, and the width of the second gap is greater than that of the first gap. The peripheral traces are located in the peripheral area, which surrounds the touch area, and the peripheral traces are electrically connected to the first touch electrode block and the second touch electrode block respectively.
11. The touch display device according to claim 10, wherein A color filter layer is provided on the light incident side of the substrate substrate.