Touch panel

Abstract

The invention provides a touch panel. The touch panel comprises a substrate, a first metal layer and a second metal layer, the first metal layer is arranged on the substrate and comprises a plurality of first polygonal meshes, wherein the length of each first polygonal mesh in the first direction is larger than the width of each first polygonal mesh in the second direction. The second metal layer is arranged on the substrate and comprises a plurality of second polygonal meshes, wherein the length of each second polygonal mesh in the second direction is larger than the width of each second polygonal mesh in the first direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a touch panel, and in particular, to a touch panel including mesh electrodes. BACKGROUND

[0002] In recent years, in order to reduce manufacturing cost and impedance, a touch panel with metal mesh electrodes has been developed. The common metal mesh electrodes are composed of periodic diamond lattices. However, the sensing electrodes extending along different directions formed by the diamond lattices still have significant impedance difference. Since the touch panel is very sensitive to the resistance-capacitance load of the sensing electrodes extending along different directions, the impedance difference between the sensing electrodes easily affects the touch sensitivity of the touch panel or causes the operation burden of the touch panel. SUMMARY

[0003] One of the main objects of the present application is to provide a touch panel to reduce the impedance difference between the sensing electrodes extending along different directions.

[0004] According to an embodiment of the present application, a touch panel is provided, which includes a substrate, a first metal layer and a second metal layer. The first metal layer is disposed on the substrate, and the first metal layer includes a plurality of first mesh electrodes extending along a first direction, wherein each first mesh electrode includes a plurality of first polygonal meshes spliced with each other, such that each first mesh electrode has a mesh pattern, wherein each first polygonal mesh has a first length in the first direction and a first width in a second direction different from the first direction, and the first length is greater than the first width. The second metal layer is disposed on the substrate and electrically insulated from the first metal layer, and the second metal layer includes a plurality of second mesh electrodes extending along the second direction, wherein the first mesh electrodes are interleaved with the second mesh electrodes in a top view of the touch panel, each second mesh electrode includes a plurality of second polygonal meshes spliced with each other, such that each second mesh electrode has another mesh pattern. Each second polygonal mesh has a second length in the second direction and a second width in the first direction, and the second length is greater than the second width.

[0005] According to another embodiment of the present application, a touch panel is provided. The touch panel includes a substrate, a first metal layer, and a second metal layer. The substrate has a plurality of first dummy areas and a plurality of second dummy areas, wherein the first dummy areas and the second dummy areas are arranged in an array and are separated from each other, and the first dummy areas and the second dummy areas are arranged alternately. The first metal layer is disposed on the substrate, and the first metal layer includes a plurality of first mesh electrodes extending along a first direction, wherein each of the first mesh electrodes includes a plurality of first grid lines and a plurality of first nodes, and the first grid lines are connected by the first nodes and surround a plurality of irregular first quadrilaterals, such that each of the first mesh electrodes has an irregular mesh pattern, wherein in a top view of the touch panel, each of the first nodes is disposed in a corresponding one of the first dummy areas, respectively. The second metal layer is disposed on the substrate and is electrically insulated from the first metal layer, and the second metal layer includes a plurality of second mesh electrodes extending along a second direction, wherein the first mesh electrodes are staggered with the second mesh electrodes in the top view, each of the second mesh electrodes includes a plurality of second grid lines and a plurality of second nodes, and the second grid lines are connected by the second nodes and surround a plurality of second quadrilaterals, such that each of the second mesh electrodes has another irregular mesh pattern, wherein in the top view, each of the second nodes is disposed in a corresponding one of the second dummy areas, respectively.

[0006] In the touch panel of the present application, since the second polygonal mesh can surround one first short side in the top view, and the first polygonal mesh can surround one second short side of the other second polygonal mesh in the top view, such that the length of the first polygonal mesh in the first direction can be greater than the width in the second direction, and the length of the second polygonal mesh in the second direction can still be greater than the width in the first direction, it is helpful to homogenize the resistance value of the first mesh electrodes in the first direction and the resistance value of the second mesh electrodes in the second direction, thereby reducing the operation burden of the touch panel and / or improving the touch sensitivity of the touch panel. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 A top view of a touch panel according to an embodiment of the present application.

[0008] Figure 2 A top view of a sensing unit according to a first embodiment of the present application.

[0009] Figure 3 An enlarged top view of a part of a sensing unit according to the first embodiment of the present application.

[0010] Figure 4 A top view of a sensing unit according to a second embodiment of the present application.

[0011] Figure 5Fig. 3 is a plan view of a sensing unit of a touch panel according to a third embodiment of the present application.

[0012] Figure 6 Fig. 4 is an enlarged plan view of a part of the sensing unit of the touch panel according to the third embodiment of the present application.

[0013] Figure 7 Fig. 5 is a plan view of a part of a sensing unit of a touch panel according to a fourth embodiment of the present application.

[0014] Figure 8 Fig. 6 is a plan view of a part of a sensing unit of a touch panel according to a fifth embodiment of the present application.

[0015] Figure 9 Fig. 7 is a cross-sectional view of a touch panel according to some embodiments of the present application. Figure 10

[0016]

Symbol Explanation

[0017] 1, 1a, 1b: Touch panel

[0018] 12: Substrate

[0019] 14: First metal layer

[0020] 141: First mesh electrode

[0021] 16: Second metal layer

[0022] 161: Second mesh electrode

[0023] 18: First connection electrode

[0024] 20: Second connection electrode

[0025] 22: Insulating layer

[0026] CL1: First cut line

[0027] CL2: Second cut line

[0028] CL3: Third cut line

[0029] CL4: Fourth cut line

[0030] CR1: First closed area

[0031] CR2: Second closed area

[0032] D1: First direction

[0033] D2: Second direction

[0034] DS1, DS2, DS3, DS4: Distance

[0035] DS5, DS6: Pitch​

[0036] G1: first grid line

[0037] G2: second grid line

[0038] L1, L11, L12, L13, L14: first long side

[0039] L2, L21, L22, L24, L23: second long side

[0040] LH1: first length

[0041] LH2: second length

[0042] P1: first node

[0043] P2: second node

[0044] Q1: first polygonal mesh

[0045] Q2: second polygonal mesh

[0046] S1, S11, S12: first short side

[0047] S2, S21, S22: second short side

[0048] SU, SU1, SU2, SU3, SU4, SU5: sensing unit

[0049] TD: top-down direction

[0050] VR1: first virtual region

[0051] VR2: second virtual region

[0052] W1: first width

[0053] W2: second width

[0054] W3, W4: maximum width

[0055] θ1, θ2: included angle DETAILED DESCRIPTION

[0056] The present application will be described in detail below with specific embodiments and accompanying drawings, and in order to make the content of the present application more clear and easy to understand, the following drawings are possible to be simplified schematic diagrams, and the elements in the drawings can not be drawn in proportion. Also, the number and size of the elements in the drawings are only for illustration, and are not intended to limit the scope of the present application.

[0057] Reference is made to Figure 1 which is a top view of a touch panel according to an embodiment of the present application. As shown in Figure 1As shown, the touch panel 1 provided in this embodiment includes a substrate 12, a first metal layer 14, and a second metal layer 16, wherein the first metal layer 14 and the second metal layer 16 are disposed on the substrate 12, and the second metal layer 16 is electrically insulated from the first metal layer 14. The first metal layer 14 includes a plurality of first grid electrodes 141 extending along a first direction D1, and the second metal layer 16 includes a plurality of second grid electrodes 161 extending along a second direction D2, wherein each first grid electrode 141 may have a grid pattern, and each second grid electrode 161 may have another grid pattern. The first direction D1 is different from the second direction D2; for example, the first direction D1 may be perpendicular to the second direction D2. For example, the outer contours of the first grid electrodes 141 and the second grid electrodes 161 may be elongated or other suitable shapes, but are not limited thereto. Furthermore, in the top view of the touch panel 1 (i.e., viewed along the top viewing direction TD of the touch panel 1), the first grid electrode 141 intersects with the second grid electrode 161 and generates capacitive coupling to form multiple sensing units SU for detecting the position of the touched object. Each sensing unit SU can, for example, be formed by an interleaved first grid electrode 141 and a second grid electrode 161. For example, the first grid electrode 141 and the second grid electrode 161 can be respectively a driving electrode for transmitting driving signals and a sensing electrode for receiving sensing signals in the touch panel 1, or vice versa. To clearly show the arrangement structure of the first grid electrode 141 and the second grid electrode 161, Figure 1 The outer contours of the first and second grid electrodes are shown, while the grid pattern is omitted, but the present invention is not limited thereto.

[0058] Substrate 12 can be used to support the first metal layer 14 and the second metal layer 16. Substrate 12 may include, for example, a transparent substrate, a display panel, or other rigid substrate. The material of the transparent substrate may include, for example, a glass substrate, a plastic substrate, an acrylic substrate, a quartz substrate, a sapphire substrate, or other suitable substrate materials. When substrate 12 includes a display panel, the first metal layer 14 and the second metal layer 16 may be formed on the display surface of the display panel or in the display panel, or respectively formed inside and outside the display panel. The first metal layer 14 and the second metal layer 16 may include, for example, gold, silver, copper, aluminum, nickel, zinc, other suitable materials, or alloys or combinations thereof.

[0059] In some embodiments, such as Figure 1 As shown, the touch panel 1 may selectively include a plurality of first connecting electrodes 18 and a plurality of second connecting electrodes 20, wherein the first connecting electrodes 18 may be respectively disposed and connected to one end or both ends of the first grid electrode 141 for electrically connecting the first grid electrode 141 to the solder pad or control element, and the second connecting electrodes 20 may be respectively disposed and connected to one end or both ends of the second grid electrode 161 for electrically connecting the second grid electrode 161 to the solder pad or control element.

[0060] In some embodiments, the first metal layer 14 can further selectively include a plurality of first dummy electrodes extending along the first direction D1, and each first mesh electrode 141 can be disposed between two adjacent first dummy electrodes. The second metal layer 16 can also further selectively include a plurality of second dummy electrodes extending along the second direction D2, and each second mesh electrode 161 can be disposed between two adjacent second dummy electrodes. By the arrangement of the first dummy electrodes and the second dummy electrodes, the first metal layer 14 and the second metal layer 16 can exhibit a uniform visual effect.

[0061] Please refer to Figure 2 With Figure 3 , Figure 2 is a top view schematic diagram of a sensing unit of a first embodiment of the present application, Figure 3 is an enlarged top view schematic diagram of a partial sensing unit of the first embodiment of the present application. As Figure 2 With Figure 3As shown, in the sensing unit SU1, each first mesh electrode 141 includes a plurality of first polygonal meshes Q1 which are tiled with each other such that each first mesh electrode 141 has a mesh pattern. Each first polygonal mesh Q1 has a first length LH1 in the first direction D1 and a first width W1 in the second direction D2, and the first length LH1 is greater than the first width W1. Each second mesh electrode 161 includes a plurality of second polygonal meshes Q2 which are tiled with each other such that each second mesh electrode 161 has another mesh pattern, wherein each second polygonal mesh Q2 has a second length LH2 in the second direction D2 and a second width W2 in the first direction D1, and the second length LH2 is greater than the second width W2. In the present disclosure, the length or width of a polygonal mesh in a direction can refer to the projected length or width of the polygonal mesh in the direction, for example, the first length LH1 (or the second width W2) of the first polygonal mesh Q1 (or the second polygonal mesh Q2) in the first direction D1 can refer to the projected length (or the projected width) of the first polygonal mesh Q1 (or the second polygonal mesh Q2) in the first direction D1, and the first width W1 (or the second length LH2) of the first polygonal mesh Q1 (or the second polygonal mesh Q2) in the second direction D2 can refer to the projected width (or the projected length) of the first polygonal mesh Q1 (or the second polygonal mesh Q2) in the second direction D2. By having the first polygonal mesh Q1 and the second polygonal mesh Q2 having longer lengths in the first direction D1 and the second direction D2 respectively, it can help to homogenize the resistance values of the first mesh electrodes 141 in the first direction D1 and the resistance values of the second mesh electrodes 161 in the second direction D2, thereby reducing the computational burden of the touch panel and / or improving the touch sensitivity of the touch panel. For example, each first mesh electrode 141 can include a plurality of first grid lines G1 and a plurality of first nodes P1, and the first grid lines G1 are connected through the first nodes P1 and surround the first polygonal mesh Q1. Each second mesh electrode 161 can include a plurality of second grid lines G2 and a plurality of second nodes P2, and the second grid lines G2 are connected through the second nodes P2 and surround the second polygonal mesh Q2. In the drawings of the present disclosure, the grid lines of the first mesh electrodes 141 and the second mesh electrodes 161 are shown with different thicknesses for the purpose of clearly distinguishing the first mesh electrodes 141 and the second mesh electrodes 161, but it is not intended to limit the line width of the grid lines. The sensing unit SU1 of the present embodiment can be applied to the sensing unit SU of the touch panel 1 of the above-mentioned embodiments or any of the touch panels described below.

[0062] As Figure 3As shown, one first polygonal grid Q1 can include four first long sides L1 and at least one first short side S1, and the first short side S1 is connected between two first long sides L1. One second polygonal grid Q2 includes four second long sides L2 and at least one second short side S2, and the second short side S2 is connected between two second long sides L2. Also, one second polygonal grid Q2 can surround one first short side S1 in a top view, and two second long sides L2 of the second polygonal grid Q2 can cross two first long sides L1 of one first polygonal grid Q1, respectively. The first polygonal grid Q1 can surround one second short side S2 of another second polygonal grid Q2 in a top view.

[0063] In Figure 3 In embodiments, each of the first polygonal grid Q1 and the second polygonal grid Q2 is a hexagon, wherein each first polygonal grid Q1 can include four first long sides L1 and two first short sides S1, and each second polygonal grid Q2 can include four second long sides L2 and two second short sides S2, but the present application is not limited thereto. For example, the first long sides L1 of each first polygonal grid Q1 include first long sides L11, L12, L13, L14, the first short sides S1 include first short sides S11, S12, and the second long sides L2 of each second polygonal grid Q2 include second long sides L21, L22, L23, L24, the second short sides S2 include second short sides S21, S22. The first short side S11 can be connected between two first long sides L11, L12, the first short side S12 can be connected between another two first long sides L13, L14, and the first long side L11 and the first long side L13 are connected between one end of the first short side S11 and one end of the first short side S12, and the first long side L12 and the first long side L14 are connected between another end of the first short side S11 and another end of the first short side S12. Thus, a first length LH1 of the first polygonal grid Q1 in a first direction D1 can be greater than a first width W1 in a second direction D2. In addition, the second short side S21 can be connected between two second long sides L21, L22, the second short side S22 can be connected between another two second long sides L23, L24, and the second long side L21 and the second long side L23 are connected between one end of the second short side S21 and one end of the second short side S22, and the second long side L22 and the second long side L24 are connected between another end of the second short side S21 and another end of the second short side S22. Thus, a second length LH2 of the second polygonal grid Q2 in the second direction D2 can be greater than a second width W2 in the first direction D1.

[0064] In this embodiment, the first polygonal mesh Q1 is irregular, meaning that the shapes of the first polygonal meshes Q1 are different from each other, resulting in an irregular mesh pattern for the first mesh electrode 141 formed by the first polygonal meshes Q1. Similarly, the second polygonal mesh Q2 is irregular, meaning that the shapes of the second polygonal meshes Q2 are different from each other, resulting in an irregular mesh pattern for the second mesh electrode 161 formed by the second polygonal meshes Q2. The irregular shape can be, for example, a non-periodic pattern. For instance, the first length LH1 of any two adjacent or identical first polygonal meshes Q1 of the same first mesh electrode 141 may be different, and / or its first width W1 may be different. Furthermore, the second length LH2 of any two adjacent or identical second polygonal meshes Q2 of the same second mesh electrode 161 may be different, and / or its second width W2 may be different. Because the first mesh electrode 141 and the second mesh electrode 161 can each have irregular mesh patterns, they are less likely to interfere with the periodically arranged pixels in the display panel, thus preventing moiré patterns.

[0065] The following section will further explain in detail the method of forming the first polygonal mesh Q1 and the second polygonal mesh Q2, so that the irregular mesh patterns of the first mesh electrode 141 and the second mesh electrode 161 can both be formed by irregular polygonal meshes. For example... Figure 3 As shown, the substrate 12 has multiple first virtual regions VR1 and multiple second virtual regions VR2. In the top view, each first node P1 is disposed in a corresponding first virtual region VR1, and each second node P2 is disposed in a corresponding second virtual region VR2. The first virtual regions VR1 can be used to restrict the position of the corresponding first node P1, and the second virtual regions VR2 can be used to restrict the position of the corresponding second node P2. In other words, although... Figure 3 The first node P1 and the second node P2 are respectively located on the edges of the first virtual region VR1 and the second virtual region VR2, but this application is not limited thereto. That is, the first node P1 can be located at any point in the first virtual region VR1, and the second node P2 can be located at any point in the second virtual region VR2. For example, the first virtual region VR1 and / or the second virtual region VR2 may have, for example, a 100×100 or 1000×1000 point array or other suitable point array, and the node may be a point randomly selected from the point array. The shapes of the first virtual region VR1 and the second virtual region VR2 may be geometric shapes, including circles, rectangles, or other suitable shapes. Figure 3 In this example, the shapes of the first virtual region VR1 and the second virtual region VR2 are circular, but are not limited to this.

[0066] It should be noted that, as Figure 3As shown, the first nodes P1 in adjacent first virtual regions VR1 can be respectively located at different positions in the corresponding first virtual regions VR1, e.g. different first nodes P1 are respectively located at different relative positions from the center point of the corresponding first virtual regions VR1. With this design, adjacent first polygonal grids Q1 can have irregular shapes, and thus can form an irregular grid pattern. Similarly, the second nodes P2 in adjacent second virtual regions VR2 can be respectively located at different positions in the corresponding second virtual regions VR2, e.g. different second nodes P2 are respectively located at different relative positions from the center point of the corresponding second virtual regions VR2. With this design, adjacent second polygonal grids Q2 can have irregular shapes, and thus can form an irregular grid pattern.

[0067] In some embodiments, the first virtual regions VR1 can be formed by providing a plurality of first regions in an array arrangement, and then moving the odd-numbered and even-numbered first regions in the odd-numbered columns along the second direction D2 and the opposite second direction D2, respectively, to form the odd-numbered columns of first virtual regions VR1 that are staggered in the first direction D1, and moving the odd-numbered and even-numbered first regions in the even-numbered columns along the opposite second direction D2 and the second direction D2, respectively, to form the even-numbered columns of first virtual regions VR1 that are staggered in the first direction D1. The first virtual regions VR1 in adjacent columns formed by the first regions in the adjacent columns can be symmetric with respect to the first direction D1. Figure 3 In some embodiments, the first virtual regions VR1 can be formed by providing a plurality of first regions in an array arrangement, and then moving the odd-numbered and even-numbered first regions in the odd-numbered columns along the second direction D2 and the opposite second direction D2, respectively, to form the odd-numbered columns of first virtual regions VR1 that are staggered in the first direction D1, and moving the odd-numbered and even-numbered first regions in the even-numbered columns along the opposite second direction D2 and the second direction D2, respectively, to form the even-numbered columns of first virtual regions VR1 that are staggered in the first direction D1. The first virtual regions VR1 in adjacent columns formed by the first regions in the adjacent columns can be symmetric with respect to the first direction D1.

[0068] In some embodiments, the first virtual regions VR1 can be formed by providing a plurality of first regions in an array arrangement, and then moving the odd-numbered and even-numbered first regions in the odd-numbered columns along the second direction D2 and the opposite second direction D2, respectively, to form the odd-numbered columns of first virtual regions VR1 that are staggered in the first direction D1, and moving the odd-numbered and even-numbered first regions in the even-numbered columns along the opposite second direction D2 and the second direction D2, respectively, to form the even-numbered columns of first virtual regions VR1 that are staggered in the first direction D1. The first virtual regions VR1 in adjacent columns formed by the first regions in the adjacent columns can be symmetric with respect to the first direction D1.

[0069] By the above formation of the first virtual regions VR1, the distance DS1 between the center points of two adjacent first virtual regions VR1 in the same row (or arranged in the second direction D2) can be made smaller than the distance DS2 between the center points of two adjacent first virtual regions VR1 in the first direction D1 (i.e., the first virtual regions VR1 formed by two adjacent first regions in the same column). In other words, the first grid lines G1 formed by the first nodes P1 in two adjacent first virtual regions VR1 in the same row can serve as first short sides S1, such as first short sides S11, S12, of the first polygonal mesh Q1, and the first grid lines G1 formed by the first nodes P1 in two adjacent first virtual regions VR1 in the first direction D1 can serve as first long sides L1, such as first long sides L11, L12, L13, L14, of the first polygonal mesh Q1.

[0070] In addition, the second virtual regions VR2 can be formed, for example, by first providing second regions arranged in an array, wherein the second regions can be staggered with the first regions, then moving the odd and even second regions in the odd rows in the direction opposite to the first direction D1 and in the first direction D1, respectively, to form the second virtual regions VR2 in the odd rows that are staggered in the second direction D2, and moving the odd and even second regions in the even rows in the first direction D1 and in the direction opposite to the first direction D1, respectively, so that the second virtual regions VR2 in the even rows are staggered in the second direction D2. The second virtual regions VR2 in adjacent rows formed by the second regions in the adjacent rows can be symmetrical to the second direction D2, for example.

[0071] By the above formation of the second virtual regions VR2, the distance DS3 between the center points of two adjacent second virtual regions VR2 in the same column (or arranged in the first direction D1) can be made smaller than the distance DS4 between the center points of two adjacent second virtual regions VR2 in the second direction D2 (i.e., the second virtual regions VR2 formed by two adjacent second regions in the same row). In other words, the second grid lines G2 formed by the second nodes P2 in two adjacent second virtual regions VR2 in the same column can serve as second short sides S2, such as second short sides S21, S22, of the second polygonal mesh Q2, and the second grid lines G2 formed by the second nodes P2 in two adjacent second virtual regions VR2 in the second direction D2 can serve as second long sides L2, such as second long sides L21, L22, L23, L24, of the second polygonal mesh Q2.

[0072] In one embodiment, the maximum width W3 of each first virtual region VR1 may be the same as each other, and the maximum width W4 of each second virtual region VR2 may be the same as each other, but is not limited thereto. The maximum width W3 of the first virtual region VR1 may be the same as or different from the maximum width W4 of the second virtual region VR2. Furthermore, the distance DS3 may be the same as or different from the distance DS1, for example. The distance DS4 may be the same as or different from the distance DS2, for example. In some embodiments, the ratio of the maximum width W3 to the distance DS2 and / or the ratio of the maximum width W4 to the distance DS4 may, for example, fall within the range of 5% to 35%. The distance DS2 and / or the distance DS4 may be greater than 200 micrometers (μm) and less than 1000 micrometers.

[0073] like Figure 3 As shown, the maximum width W3 of each first virtual region VR1 can be greater than 0 and less than the distance DS1 between the center points of two first virtual regions VR1 corresponding to the first short side S1 of a first polygonal grid Q1. In other words, two adjacent first virtual regions VR1 in the same row (or arranged in the second direction D2) can be separated from each other, but are not limited to this. Similarly, the maximum width W4 of each second virtual region VR2 can be greater than 0 and less than the distance DS3 between the center points of two second virtual regions VR2 corresponding to the second short side S2 of a second polygonal grid Q2. In other words, two adjacent second virtual regions VR2 in the same column (or arranged in the first direction D1) can be separated from each other, but are not limited to this.

[0074] Since the two first virtual regions VR1 corresponding to the first short side S1 of a first polygonal mesh Q1 are separated from each other, and the two adjacent first virtual regions VR1 in the first direction D1 are misaligned, the center points of the three first virtual regions VR1 corresponding to the two connected first long sides L1 can be connected to form two first straight lines corresponding to the two first long sides L1, and the included angle θ1 between the first straight lines can be greater than 90 degrees and less than 180 degrees. Similarly, since the two second virtual regions VR2 corresponding to the second short side S2 of a second polygonal mesh Q2 are separated from each other, and the two adjacent second virtual regions VR2 in the second direction D2 are misaligned, the center points of the three second virtual regions VR2 corresponding to the two connected second long sides L2 can be connected to form two second straight lines corresponding to the two second long sides L2, and the included angle θ2 between the second straight lines can be greater than 90 degrees and less than 180 degrees.

[0075] exist Figure 4In this embodiment, the two first virtual regions VR1 corresponding to the first long side L1 may have the same first tangent CL1, adjacent to the two second virtual regions VR2. The second virtual region VR2 adjacent to the first tangent CL1 may have a second tangent CL2 parallel to and adjacent to the first tangent CL1. The second tangent CL2 and the first tangent CL1 may have a distance DS5, ensuring that the second node P2 disposed in the second virtual region VR2 does not overlap with the first grid line G1, thereby reducing the uneven coupling capacitance of the sensing unit SU1. Similarly, the two second virtual regions VR2 corresponding to the second long side L2 may have the same third tangent CL3, adjacent to the two first virtual regions VR1. The first virtual region VR1 adjacent to the third tangent CL3 may have a fourth tangent CL4 parallel to and adjacent to the third tangent CL3. The fourth tangent CL4 and the third tangent CL3 may have a distance DS6, ensuring that the first node P1 disposed in the first virtual region VR1 does not overlap with the second grid line G2. The distance DS5 and / or the distance DS6 may be, for example, greater than 10 micrometers.

[0076] Please refer to Figure 4 This is a top view schematic diagram of the sensing unit according to the second embodiment of the present invention. Figure 3 As shown, the sensing unit SU2 provided in this embodiment and Figure 4 The difference in the sensing unit SU1 is that, in this embodiment, the first polygonal grid Q1 and the second polygonal grid Q2 have the same hexagonal shape, resulting in the first grid electrode 141 and the second grid electrode 161 having a regular grid pattern. The first polygonal grid Q1 can extend along the first direction D1, while the second polygonal grid Q2 can extend along the second direction D2. Figure 3 In this embodiment, the first node P1 can be located at the center point of the first virtual region VR1, and the second node P2 can be located at the center point of the second virtual region VR2, such that the first polygonal mesh Q1 and the second polygonal mesh Q2 are identical hexagons, but this is not limited to this. For example, the first length LH1 of any two adjacent first polygonal meshes Q1 can be the same, and their first width W1 can be the same. Furthermore, the second length LH2 of any two adjacent second polygonal meshes Q2 can be the same, and their second width W2 can be the same. Since other parts of the sensing unit SU2 in this embodiment can be... Figure 5 The sensing unit SU1 is the same as that in the above embodiment, so it will not be described in detail here. The sensing unit SU2 in this embodiment can be applied to the sensing unit SU of the touch panel 1 in the above embodiment or to any touch panel mentioned below.

[0077] Please refer to Figure 6 and Figure 5 , Figure 6 This is a top view schematic diagram of the sensing unit of the touch panel according to the third embodiment of the present invention, andFigure 5 This is an enlarged top view schematic diagram of some sensing units according to the third embodiment of the present invention. Figure 6 and Figure 3 As shown, the sensing unit SU3 provided in this embodiment and Figure 6 The difference in the sensing unit SU1 is that at least one first polygonal grid Q1 and / or at least one second polygonal grid Q2 can be quadrilaterals or pentagons to improve the irregularity of the first grid electrode 141 and the second grid electrode 161. In this case, at least another first polygonal grid Q1 and / or at least another second polygonal grid Q2 can be hexagonal. When the first polygonal grid Q1 is pentagonal, the first polygonal grid Q1 may include four first long sides L1 and one first short side S1. Similarly, when the second polygonal grid Q2 is pentagonal, the second polygonal grid Q2 may include four second long sides L2 and one second short side S2. When the first polygonal grid Q1 is quadrilateral, the first polygonal grid Q1 may include four first long sides L1. Similarly, when the second polygonal grid Q2 is quadrilateral, the second polygonal grid Q2 may include four second long sides L2. In this embodiment, the first length LH1 of any two adjacent or the same first grid electrode 141's first polygonal grid Q1 may be different, and / or its first width W1 may be different. Furthermore, the second length LH2 of any two adjacent or identical second polygonal grids Q2 of the second grid electrode 161 may be different, and / or their second width W2 may be different. In some embodiments, at least three first polygonal grids Q1 may be quadrilaterals, pentagons, and hexagons, but are not limited thereto.

[0078] exist Figure 3In an embodiment, the maximum width W3 of each first virtual region VR1 can be equal to the distance DS1 between the center points of two first virtual regions VR1 corresponding to the first short side S1 of one first polygonal grid Q1, and the maximum width W4 of each second virtual region VR2 can be equal to the distance DS3 between the center points of two second virtual regions VR2 corresponding to the second short side S2 of one second polygonal grid Q2. In other words, the edges of two adjacent first virtual regions VR1 in the same row (or arranged in the second direction D2) can be flush with each other, and the edges of two adjacent second virtual regions VR2 in the same column (or arranged in the first direction D1) can be flush with each other. The first node P1 can be disposed at any point in the first virtual region VR1, and the second node P2 can be disposed at any point in the second virtual region VR2. Since the edges of two adjacent second virtual regions VR2 are flush with each other, the first nodes P1 disposed in two adjacent first virtual regions VR1 in the same row can be different points, or can be located at the edges of the first virtual regions VR1 that are flush with each other and can be regarded as one first node P1. When the number of first nodes P1 located at the edges of the first virtual regions VR1 that are flush with each other is one, the first polygonal grid Q1 formed by the first node P1 can be a pentagon. When the number of first nodes P1 is two, the first polygonal grid Q1 can be a quadrilateral. Similarly, when the number of second nodes P2 located at the edges of the second virtual regions VR2 that are flush with each other is one or two, the second polygonal grid Q2 formed by the second node P2 can be a pentagon or a quadrilateral. Since other parts of the sensing unit SU3 of the present embodiment can be the same as the sensing unit SU1 of Figure 7 , the details are not repeated here. The sensing unit SU3 of the present embodiment can be applied to the sensing unit SU of the touch panel 1 of the above-mentioned embodiments or any of the touch panels described below.

[0079] Please refer to Figure 7 , which is a top view of a partial sensing unit of a touch panel according to a fourth embodiment of the present application. As shown in Figure 3 , the sensing unit SU4 provided by the present embodiment differs from the sensing unit SU1 of Figure 3 in that at least one first polygonal grid Q1 and / or at least one second polygonal grid Q2 can be a concave hexagon. The first length LH1 of the first polygonal grid Q1 in the first direction D1 can still be greater than the first width W1 in the second direction D2, and the length LH2 of the second polygonal grid Q2 in the second direction D2 can still be greater than the second width W2 in the first direction D1, so as to homogenize the resistance values of the first grid electrodes 141 arranged along the first direction D1 and the resistance values of the second grid electrodes 161 arranged along the second direction D2.

[0080] In this embodiment, the first virtual regions VR1 can be arranged in an array, the second virtual regions VR2 can be arranged in the same array, and the first virtual regions VR1 and the second virtual regions VR2 are arranged in a staggered manner. In this case, the center points of any two adjacent ones of the three first virtual regions VR1 arranged in the same column can be connected to form a first straight line, and the included angle θ1 between the two first straight lines formed by the connections can be equal to 180 degrees. Similarly, the included angle θ2 between the two second straight lines formed by the connections of the center points of the three second virtual regions VR2 arranged in the same row can also be equal to 180 degrees.

[0081] In particular, the first polygonal grid Q1 and the second polygonal grid Q2 can be irregular first hexagons and second hexagons, respectively. Also, one second hexagon can surround one side of one first hexagon in a top view, two sides of the second hexagon can cross two other sides of the first hexagon connected to the one side, respectively, and the first hexagon can surround one side of another second hexagon in a top view. For example, the first lengths LH1 of the first hexagons of any two adjacent or the same first grid electrodes 141 can not be the same, and / or the first widths W1 thereof can not be the same. Also, the second lengths LH2 of the second hexagons of any two adjacent or the same second grid electrodes 161 can not be the same, and / or the second widths W2 thereof can not be the same. In this embodiment, the short sides of the first hexagons are not limited to be formed by two adjacent first virtual regions VR1 in the same row, and the short sides of the second hexagons are not limited to be formed by two adjacent second virtual regions VR2 in the same column. Since other parts of the sensing unit SU4 of this embodiment can be the same as those of the sensing unit SU1 of Figure 8 , the details thereof will not be repeated here. The sensing unit SU4 of this embodiment can be applied to the sensing unit SU of the touch panel 1 of the above-mentioned embodiments or any of the touch panels described below.

[0082] Please refer to Figure 8 , which is a top view of a partial sensing unit of a touch panel of a fifth embodiment of the present application. As shown in Figure 3 , the sensing unit SU5 provided by this embodiment is different from the sensing unit SU1 of Figure 3 in that the first polygonal grid Q1 and the second polygonal grid Q2 are quadrilateral grids, wherein the first grid lines G1 are connected by the first nodes P1 and surround a plurality of irregular first quadrilateral grids, and the second grid lines G2 are connected by the second nodes P2 and surround a plurality of second quadrilateral grids.

[0083] In this embodiment, the first virtual regions VR1 and the second virtual regions VR2 can be arranged in an array and separated from each other, wherein the first virtual regions VR1 and the second virtual regions VR2 are arranged in a staggered manner. In other words, Figure 3Two adjacent first virtual regions VR1 in the same row (or arranged in the second direction D2) can be moved to coincide with each other to form the same first virtual region VR1, and edges of two adjacent second virtual regions VR2 in the same column (or arranged in the first direction D1) can be moved to coincide with each other to form the same second virtual region VR2, such that the first virtual regions VR1 and the second virtual regions VR2 in the same row of the array are sequentially and alternately arranged, and the first virtual regions VR1 and the second virtual regions VR2 in the same column of the array are also sequentially and alternately arranged. That is, the arrangement of the first virtual regions VR1 and the second virtual regions VR2 in the embodiment is as follows: Figure 3 In the case that the distance DS1 and the distance DS3 in the above formula are 0. For example, the center points in three adjacent first virtual regions VR1 corresponding to two first sides (i.e., two connected first grid lines G1) connected to each other of the first polygonal grid Q1 can be connected into two first straight lines, and the included angle θ1 between the two connected first straight lines can be equal to 90 degrees. Similarly, the included angle θ2 between two second straight lines connected by the center points of three second virtual regions VR2 corresponding to two second sides (i.e., two connected second grid lines G2) connected to each other of the second polygonal grid Q2 is also equal to 90 degrees.

[0084] By randomly setting each first node P1 in the corresponding first virtual region VR1 and randomly setting each second node P2 in the corresponding second virtual region VR2, the first and second irregular quadrilateral grids can be formed. Since adjacent first quadrilateral grids can have different shapes, the first nodes P1 arranged in the first virtual regions VR1 in the same row can not be arranged in the same straight line, and the first nodes P1 arranged in the first virtual regions VR1 in the same column can also not be arranged in the same straight line. Similarly, since adjacent second quadrilateral grids can have different shapes, the second nodes P2 arranged in the second virtual regions VR2 in the same row can not be arranged in the same straight line, and the second nodes P2 arranged in the second virtual regions VR2 in the same column can also not be arranged in the same straight line. Since other parts of the sensing unit SU5 of the embodiment can be the same as the sensing unit SU1 of Figure 9 , which is the same as the sensing unit SU1 of the embodiment, will not be described here. The sensing unit SU5 of the embodiment can be applied to the sensing unit SU of the touch panel 1 of the above-mentioned embodiments or any of the touch panels below.

[0085] Please refer to Figure 10 and Figure 9 , which are cross-sectional schematic views of the touch panel of some embodiments of the present application. As Figure 9 ​As shown, in some embodiments of the touch panel 1a, the first metal layer 14 and the second metal layer 16 can be disposed on the same side of the substrate 12, and the touch panel can further include an insulating layer 22 disposed between the first metal layer 14 and the second metal layer 16 for electrically insulating the first metal layer 14 and the second metal layer 16. The order of disposing the first metal layer 14 and the second metal layer 16 on the substrate 12 is not limited, and the positions of the first metal layer 14 and the second metal layer 16 can also be exchanged with each other. The stack structure of the touch panel of the present application is not limited. As shown, in another embodiment of the touch panel 1b, the first metal layer 14 and the second metal layer 16 can be disposed on two opposite sides of the substrate 12, respectively, and thus the substrate 12 can be used to electrically insulate the first metal layer 14 and the second metal layer 16. In some embodiments, the first metal layer 14 and the second metal layer 16 can also be formed on different substrates, respectively, and then adhered to each other, but the present application is not limited thereto. Figure 10 ​

[0086] In summary, in the touch panel of the present application, since the second polygonal mesh can surround one first short side in the top view, and the first polygonal mesh can surround one second short side of the second polygonal mesh in the top view, the length of the first polygonal mesh in the first direction can be greater than the width in the second direction, and the length of the second polygonal mesh in the second direction can still be greater than the width in the first direction, thus helping to homogenize the resistance value of the first mesh electrode in the first direction and the resistance value of the second mesh electrode in the second direction, thereby reducing the operation burden of the touch panel and / or improving the touch sensitivity of the touch panel. In addition, since the first mesh electrode and the second mesh electrode can have irregular mesh patterns without periodicity, moire caused by interference with the periodically arranged pixels in the display panel can also be reduced.

[0087] The above description is only the preferred embodiments of the present application, and any equivalent changes and modifications made according to the claims of the present application shall be within the scope of the present application.​​

Claims

1. A touch panel, characterized by, Comprising: a substrate; a first metal layer disposed on the substrate, and the first metal layer includes a plurality of first mesh electrodes extending along a first direction, wherein each of the first mesh electrodes includes a plurality of first polygonal meshes that are spliced to each other such that each of the first mesh electrodes has a mesh pattern, wherein each of the first polygonal meshes has a first length in the first direction and a first width in a second direction different from the first direction, and the first length is greater than the first width; and a second metal layer disposed on the substrate and electrically insulated from the first metal layer, and the second metal layer includes a plurality of second mesh electrodes extending along the second direction, wherein the first mesh electrodes are interleaved with the second mesh electrodes in a top view of the touch panel, each of the second mesh electrodes includes a plurality of second polygonal meshes that are spliced to each other such that each of the second mesh electrodes has another mesh pattern, wherein each of the second polygonal meshes has a second length in the second direction and a second width in the first direction, and the second length is greater than the second width.

2. The touch panel according to claim 1, wherein The first polygonal meshes are irregular such that the mesh pattern is irregularly shaped, and the second polygonal meshes are irregular such that the other mesh pattern is irregularly shaped.

3. The touch panel according to claim 1, wherein Each of the first polygonal meshes and each of the second polygonal meshes is a hexagon.

4. The touch panel according to claim 1, wherein At least one of the second polygonal meshes or at least one of the first polygonal meshes is a quadrilateral or a pentagon.

5. The touch panel according to claim 1, wherein One of the first polygonal meshes includes four first long sides and at least one first short side connected between two of the first long sides, two of the second polygonal meshes each include four second long sides and at least one second short side connected between two of the second long sides, and one of the two of the second polygonal meshes surrounds the at least one first short side in the top view of the touch panel, two of the second long sides of the one of the two of the second polygonal meshes each intersects two of the first long sides of the one of the first polygonal meshes, and the one of the first polygonal meshes surrounds the at least one second short side of the other of the two of the second polygonal meshes in the top view.

6. The touch panel according to claim 5, wherein Each of the first mesh electrodes includes a plurality of first grid lines and a plurality of first nodes, the first grid lines are connected by the first nodes and surround the first polygonal meshes, each of the second mesh electrodes includes a plurality of second grid lines and a plurality of second nodes, and the second grid lines are connected by the second nodes and surround the second polygonal meshes.

7. The touch panel according to claim 1, wherein ​ 8. The touch panel according to claim 7, wherein The substrate has a plurality of first dummy areas and a plurality of second dummy areas, each of the first nodes is disposed in a corresponding one of the first dummy areas, and each of the second nodes is disposed in a corresponding one of the second dummy areas in the top view, wherein center points of six of the first dummy areas corresponding to one of the first polygonal meshes are connected to form a first closed area, the first closed area surrounds two of the second dummy areas, center points of six of the second dummy areas corresponding to one of the second polygonal meshes are connected to form a second closed area, and the second closed area surrounds two of the first dummy areas.

9. The touch panel according to claim 8, wherein, One of the first polygonal meshes includes two first long sides connected to each other, and one of the second polygonal meshes includes two second long sides connected to each other, wherein center points of three of the first dummy areas corresponding to the first long sides are connected to form two first straight lines corresponding to the first long sides, an included angle between the first straight lines is greater than 90 degrees and less than or equal to 180 degrees, center points of three of the second dummy areas corresponding to the second long sides are connected to form two second straight lines corresponding to the second long sides, and an included angle between the second straight lines is greater than 90 degrees and less than or equal to 180 degrees.

10. The touch panel according to claim 8, wherein One of the first polygonal meshes includes two first long sides connected to each other, one of the second polygonal meshes includes two second long sides connected to each other, each of the first dummy areas and each of the second dummy areas is circular, two of the first dummy areas corresponding to one of the first long sides have a same first tangent line, the two of the second dummy areas are adjacent to the two of the first dummy areas, one of the two of the second dummy areas is adjacent to the two of the first dummy areas and has a second tangent line parallel to and adjacent to the first tangent line, and a distance between the first tangent line and the second tangent line is greater than 10 microns.

11. The touch panel according to claim 8, wherein One of the first polygonal meshes includes at least one first short side, and one of the second polygonal meshes includes at least one second short side, wherein a maximum width of each of the first dummy areas is greater than 0 and less than or equal to a distance between center points of two of the first dummy areas corresponding to the at least one first short side, and a maximum width of each of the second dummy areas is greater than 0 and less than or equal to a distance between center points of two of the second dummy areas corresponding to the at least one second short side.

12. The touch panel according to claim 1, wherein At least one of the first polygonal meshes and at least one of the second polygonal meshes is a concave hexagon.

13. A touch panel, characterized by comprising: Comprising: A substrate has a plurality of first dummy areas and a plurality of second dummy areas, wherein the first dummy areas and the second dummy areas are arranged in an array and are separated from each other, and the first dummy areas and the second dummy areas are arranged alternately. a first metal layer disposed on the substrate, and the first metal layer includes a plurality of first mesh electrodes extending along the first direction, wherein each of the first mesh electrodes includes a plurality of first grid lines and a plurality of first nodes, and the first grid lines are connected through the first nodes and surround a plurality of irregular first quadrilateral meshes, so that each of the first mesh electrodes has an irregular mesh pattern, wherein in a top view of the touch panel, each of the first nodes is disposed in a corresponding one of the first virtual regions, respectively; and a second metal layer disposed on the substrate and electrically insulated from the first metal layer, and the second metal layer includes a plurality of second mesh electrodes extending along the second direction, wherein the first mesh electrodes are interleaved with the second mesh electrodes in the top view, each of the second mesh electrodes includes a plurality of second grid lines and a plurality of second nodes, and the second grid lines are connected through the second nodes and surround a plurality of second quadrilateral meshes, so that each of the second mesh electrodes has another irregular mesh pattern, wherein in the top view, each of the second nodes is disposed in a corresponding one of the second virtual regions, respectively.

14. The touch panel according to claim 13, wherein one of the first quadrilateral meshes includes two first sides connected to each other, and one of the second polygonal meshes includes two second sides connected to each other, wherein center points of three of the first virtual regions corresponding to the first sides are connected into two first straight lines corresponding to the first sides, an included angle between the first straight lines is equal to 90 degrees, center points of three of the second virtual regions corresponding to the second sides are connected into two second straight lines corresponding to the second sides, and an included angle between the second straight lines is equal to 90 degrees.

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