TWI835629B - Touch panel - Google Patents

Abstract

The present invention provides a touch panel including a substrate, a first metal layer, and a second metal layer. The first metal layer is disposed on the substrate and includes a plurality of first mesh electrodes extending along a first direction, and each first mesh electrode has an irregular mesh pattern. 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 a second direction, in which the first mesh electrodes cross the second mesh electrodes in a top view, and each second mesh electrode has another irregular mesh pattern.

Description

Touch panel

The present invention relates to a touch panel, and in particular to a touch panel including grid electrodes.

In recent years, in order to reduce production costs and impedance, touch panels using metal mesh as sensing electrodes have been developed. Common metal grid electrodes are composed of periodic diamond-shaped lattice. However, because the periodic diamond-shaped grid is used with a display panel with a periodic pixel arrangement, such as a liquid crystal display panel or an organic light-emitting display panel, visible moiré patterns are easily produced. (moiré pattern), causing discomfort to the user. Although the industry has currently proposed an irregular metal grid solution to reduce moiré, this solution still has many shortcomings, such as uneven coupling capacitance, uneven impedance, and poor visual effects of the touch panel, making it unsatisfactory. Commercially available product specifications, so it is not easy to find touch panels with irregular metal grids in actual products.

According to an embodiment of the present invention, a touch panel is provided, which includes a substrate, a first metal layer and a second metal layer. The substrate has a plurality of first virtual areas and a plurality of second virtual areas, wherein the first virtual areas are separated from each other and arranged in an array, the second virtual areas are separated from each other and arranged in an array, and the first virtual areas are The second virtual area is arranged in a staggered manner, and the first virtual area A projection in a first direction and a projection in a second direction of one of the regions and one of the adjacent second virtual regions have a first interval and a second interval respectively. The first metal layer is disposed on the substrate, and the first metal layer includes a plurality of first grid electrodes extending along the first direction, wherein each first grid electrode 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 quadrilaterals, so that each first grid electrode has an irregularly shaped grid pattern, where in a top view of the touch panel , each first node is respectively disposed in one of the corresponding first virtual areas. 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 grid electrodes extending along the second direction, wherein the first grid electrode is connected to the first grid electrode in a top view. Two grid electrodes are interlaced, each second grid electrode 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 quadrilaterals, so that each second grid electrode The two grid electrodes have another grid pattern of irregular shape, wherein in the top view, each second node is respectively disposed in one of the corresponding second virtual areas.

1,1a,1b:Touch panel

12:Substrate

14: First metal layer

141: First grid electrode

142: First dummy electrode

16: Second metal layer

161: Second grid electrode

162: Second virtual electrode

18: First connection electrode

20: Second connection electrode

22:Insulation layer

a1,a2,b1,b2:width

CP: intersection point

D1: first direction

D2: second direction

L1: first grid line

L2: second grid line

L3: The third grid line

L4: The fourth grid line

P1: first node

P2: second node

P3: The third node

P4: The fourth node

Px1,Px2,Py1,Py2: pitch

Q1: First quadrilateral

Q2: Second quadrilateral

R1:Region

S1: first interval

S2: second interval

S3: The third interval

S4: The fourth interval

S5: The fifth interval

S6: The sixth interval

SU: sensing unit

TD: looking down direction

VR1: The first virtual area

VR2: The second virtual area

θ11,θ12,θ13,θ14,θ11',θ12',θ13',θ14',θ21,θ22,θ23,θ24,θ21',θ22',θ23',θ24',α,β,α',β': Angle

Figure 1 is a schematic top view of a touch panel according to an embodiment of the present invention.

Figures 2 and 3 are enlarged schematic views of the structure of the touch panel in Figure 1 in region R1.

Figures 4 and 5 are schematic cross-sectional views of touch panels according to different embodiments of the present invention.

The content of the present invention will be described in detail below with reference to specific embodiments and drawings. In order to make the content of the present invention clearer and easier to understand, the following drawings are schematic diagrams that may be simplified, and the elements thereof may not be drawn to scale. Moreover, the number and size of each element in the drawings are only for illustration and are not used to limit the scope of the present invention.

Please refer to Figures 1 to 3. Figure 1 illustrates a top view of a touch panel according to an embodiment of the present invention, and Figures 2 and 3 illustrate the touch panel of Figure 1 in area R1. Enlarged diagram of the structure. In order to clearly show the structure of the touch panel, Figure 2 shows the positional relationship between the virtual area and the grid electrodes, and Figure 3 shows the angle relationship between the grid lines of the grid electrodes. Moreover, in order to clearly display the grid patterns of different metal layers, the grid lines of different metal layers in Figures 1 to 3 are displayed with different thicknesses, but this is not used to limit the line width of the grid lines. As shown in Figure 1, the touch panel 1 provided in this embodiment includes a substrate 12, a first metal layer 14 and a second metal layer 16, where the first metal layer 14 and the second metal layer 16 are disposed on On the substrate 12 , the second metal layer 16 is electrically insulated from the first metal layer 14 . The first metal layer 14 includes a plurality of first mesh electrodes 141 extending along the first direction D1, and the second metal layer 16 includes a plurality of second mesh electrodes 161 extending along the second direction D2. For example, the peripheral outlines of the first mesh electrode 141 and the second mesh electrode 161 may be elongated or other suitable shapes, but are not limited thereto. Furthermore, in a top view of the touch panel 1 (that is, viewed along the top view direction TD of the touch panel 1), the first grid electrodes 141 intersect with the second grid electrodes 161 and generate capacitive coupling to form multiple sensing elements. The unit SU is used to detect the position of the touch object. Each sensing unit SU may, for example, be formed by staggering one first grid electrode 141 and one second grid electrode 161 . For example, the first mesh electrode 141 and the second mesh electrode 161 can be respectively the driving electrode for transmitting the driving signal and the sensing electrode for receiving the sensing signal in the touch panel 1, or vice versa.

The substrate 12 can be used to carry the first metal layer 14 and the second metal layer 16 . The 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 the substrate 12 includes a display panel, the first metal layer 14 and the second metal layer 16 can be formed on the display surface of the display panel or in the display panel, or formed inside and outside the display panel respectively. 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.

As shown in Figures 1 and 2, each first grid electrode 141 may include a plurality of first grid lines L1 and a plurality of first nodes P1, and the first grid lines L1 are connected through the first nodes P1 and surround the The plurality of first quadrilaterals Q1 are such that each first mesh electrode 141 has an irregularly shaped mesh pattern. Furthermore, each second grid electrode 161 includes a plurality of second grid lines L2 and a plurality of second nodes P2, and the second grid lines L2 are connected through the second nodes P2 and surround a plurality of second quadrilaterals Q2, so that Each second mesh electrode 161 has an irregularly shaped mesh pattern. Since the first grid electrode 141 and the second grid electrode 161 may respectively have irregular grid patterns without periodicity, moiré patterns are unlikely to interfere with the periodically arranged pixels in the display panel.

Specifically, as shown in Figure 2, a first node P1 can be connected to four first grid lines L1, and the four first grid lines L1 can surround a first quadrilateral Q1. Moreover, each first quadrilateral Q1 may be an irregular quadrilateral. For example, its two opposite sides are neither parallel nor have the same length. Therefore, the first quadrilateral Q1 may be spliced to form an irregular grid without periodicity. pattern. Any two adjacent first quadrilaterals Q1 may, for example, be different from each other. Each first node P1 may be a corner of the first quadrilateral Q1, and the first grid line L1 connected between two adjacent first nodes P1 may be a side of the first quadrilateral Q1. . In some embodiments, a part of the first grid line L1 may, for example, be connected only to the first node P1 of the outermost first quadrilateral Q1. Similarly, a second node P2 can be connected to four second grid lines L2, and the four second grid lines L2 can surround a second quadrilateral Q2. Each second quadrilateral Q2 may be an irregular quadrilateral. For example, its two opposite sides are not parallel and have the same length. Therefore, the second quadrilateral Q2 may be spliced to form an irregular grid pattern without periodicity. Any two adjacent second quadrilaterals Q2 may, for example, be different from each other. Each second node P2 may be a corner of the second quadrilateral Q2, and the second grid line L2 connected between two adjacent second nodes P2 may be a side of the second quadrilateral Q2. . In some embodiments, a portion of the second grid line L2 may, for example, only be connected to the second node P2 of the outermost second quadrilateral Q2. Need explanation It is worth mentioning that since the first mesh electrode 141 and the second mesh electrode 161 are both formed by quadrilateral shapes, the impedance of the first mesh electrode 141 can be similar or the same as the impedance of the second mesh electrode 161, so that the touch panel 1 can have uniform electrical properties. Moreover, since the nodes (such as the first node P1 or the second node P2) and the plurality of grid lines (such as the first grid line L1 or the second grid line L2) can be formed, for example, through a lithography process and an etching process, there is a limitation. Due to process limitations, the width of the node may be slightly larger than the line width of the grid line, but is not limited to this. The line width of the first ruled line L1 may be, for example, the same as the line width of the second ruled line L2.

In a top view of the touch panel 1 (viewed along the top view direction TD), the first quadrilateral Q1 and the second quadrilateral Q2 can be arranged in a staggered manner, so that only one first quadrilateral Q1 is provided with A second node P2, and only one first node P1 is provided in a second quadrilateral Q2. In this embodiment, the first quadrilateral Q1 and the second quadrilateral Q2 that are interlaced with each other in a top view may, for example, be different from each other.

In addition, as shown in FIG. 2 , the first grid lines L1 may respectively intersect with the second grid lines L2 in a top view (viewed along the top view direction TD), so that one of the first grid electrodes 141 is connected to the second grid line. One sensing unit SU formed by staggering one of the electrodes 161 may have multiple intersection points CP. In some embodiments, since one of the first grid lines L1 may only form one intersection point CP with the corresponding one of the second grid lines L2, the number of intersection points CP in different sensing units SU may be the same or similar to each other. , but not limited to this. Through the same or similar number of intersection points CP, the coupling capacitances of different sensing units SU can be made similar or consistent to meet the requirements of the applied products.

The method of forming the first quadrilateral Q1 and the second quadrilateral Q2 will be further described in detail below, so that the irregular mesh patterns of the first mesh electrode 141 and the second mesh electrode 161 can be formed by irregular quadrilateral shapes. form. As shown in FIG. 2 , the substrate 12 may have multiple positions for limiting the position of the first node P1 A first virtual area VR1 and a plurality of second virtual areas VR2 used to limit the position of the second node P2, where the first virtual areas VR1 are separated from each other and arranged in an array, and the second virtual areas VR2 are separated from each other and Arranged in an array, the first virtual area VR1 and the second virtual area VR2 are arranged in a staggered manner, and the projection of one of the second virtual areas VR2 and the adjacent first virtual area VR1 in the first direction D1 is the same as the projection of the adjacent first virtual area VR1 in the first direction D1. The projections in the two directions D2 respectively have a first interval S1 and a second interval S2. In the top view, each first node P1 is respectively disposed in a corresponding first virtual region VR1, and each second node P2 is respectively disposed in a corresponding second virtual region VR2, so that each first node P1 can be separated from the first virtual region VR1. The two grid lines L2 overlap, and each second node P2 may not overlap the first grid line L1. The coupling capacitance generated by the overlap of the first node P1 and the second grid line L2 and/or the overlap of the second node P2 and the first grid line L1 will be different from the coupling generated by the overlap of the first grid line L1 and the second grid line L2. capacitor, so through the above design, abnormal or uneven coupling capacitance can be reduced or avoided.

It is worth noting that the first distance S1 and the second distance S2 may be greater than 0, for example, greater than the alignment error of the first metal layer 14 and the second metal layer 16 in a top view. The alignment error between the first metal layer 14 and the second metal layer 16 may be, for example, a process error in bonding the first metal layer 14 and the second metal layer 16 , or an error in the alignment of the first metal layer 14 or the second metal layer 16 . Process errors during patterning, but not limited to this. In other words, the projections of the first virtual area VR1 and the second virtual area VR2 in the first direction D1 do not overlap, and the projections of the first virtual area VR1 and the second virtual area VR2 in the second direction D2 do not overlap. In some embodiments, the first interval S1 may be the same as or different from the second interval S2. It should be noted that the width of the interval (for example, the first interval S1 or the second interval S2) needs to be larger than the width of the node (for example, the first node P1 or the second node P2), so that it is located in the adjacent first virtual region VR1 The projections of the first node P1 and the second node P2 in the second virtual region VR2 in the first direction D1 or the second direction D2 will not overlap each other, thereby avoiding the problem of abnormal or uneven coupling capacitance. In addition, the width of the interval (eg, the first interval S1 or the second interval S2) may be smaller than the width of the first virtual region VR1 and/or the width of the second virtual region VR2.

As shown in FIG. 2 , the projection of one of the second virtual areas VR2 and the other first virtual area VR1 adjacent thereto in the first direction D1 in the first direction D1 may have a third interval S3, and the The projection of one of the two virtual regions VR2 and the other first virtual region VR1 adjacent thereto in the second direction D2 in the second direction D2 may have a fourth interval S4. For example, the third interval S3 may be the same as or different from the first interval S1, and/or the fourth interval S4 may be the same as or different from the second interval S2.

In this embodiment, the first virtual regions VR1 may be the same as each other, that is, have the same width in the first direction D1 and the same width in the second direction D2. Similarly, the second virtual regions VR2 can also be the same as each other, that is, have the same width in the first direction D1 and the same width in the second direction D2. In addition, according to actual design requirements, the first virtual area VR1 may be the same as or different from the second virtual area VR2. For example, the area of each first virtual region VR1 may be greater than 0, and the area of each second virtual region VR2 may be greater than 0.

As shown in Figure 2, the first virtual area VR1 has a pitch Px1 in the first direction D1 and a pitch Py1 in the second direction D2, and the second virtual area VR2 has a pitch Px2 in the first direction D1. , and has a pitch Py2 in the second direction D2. Since the first virtual region VR1 and the second virtual region VR2 can be arranged in the same array, the pitch Px1 can be the same as the pitch Px2, and the pitch Py1 can be the same as the pitch Py2. The "pitch in the first direction D1" herein may refer to the left side (or center point or right side) of two adjacent first virtual areas VR1 (or second virtual area VR2) in the first direction D1. The distance between them, and the "pitch in the second direction D2" may refer to the upper side (or center point or lower edge) of two adjacent first virtual areas VR1 (or second virtual area VR2) in the second direction D2. sides). For example, the ratio of the width a1 of the first virtual region VR1 in the first direction D1 to the pitch Px1 may be less than 0.6, and the ratio of the width a2 of the second virtual region VR2 in the first direction D1 to the pitch Px2 may be Less than 0.6. also, The ratio of the width b1 of the first virtual region VR1 in the second direction D2 to the pitch Py1 may be less than 0.6, and the ratio of the width b2 of the second virtual region VR2 in the second direction D2 to the pitch Py2 may be less than 0.6.

It should be noted that, as shown in Figure 2, the first nodes P1 in the first virtual region VR1 arranged in the same column and/or the same row can be located at different positions in the corresponding first virtual region VR1, for example, the first node P1 in the first virtual region VR1. The distance between a node P1 and the upper side (or lower side) of the corresponding first virtual region VR1 extending along the second direction D2 is different from each other, and the first node P1 and the corresponding first virtual region VR1 are along The distances between the left sides (or right sides) extending in the first direction D1 are different from each other. Through this design, the first quadrilaterals Q1 in the same row and column can have irregular shapes, thereby forming an irregular grid pattern. For example, each first virtual region VR1 may have a plurality of points evenly distributed or arranged in an array, and the position of each point in each first virtual region VR1 is consistent with the position of a corresponding point in other first virtual regions VR1 Same location. That is, the distance between this point and the upper side and left side of the first virtual region VR1 is the same as the distance between the corresponding point and the upper side and left side of the corresponding first virtual region VR1 respectively. By randomly selecting points at different positions in the first virtual region VR1 as the first node P1, the first quadrilateral Q1 connected by the first grid line L1 can have an irregular shape and form an irregular grid pattern. Similarly, the second nodes P2 arranged in the second virtual area VR2 in the same column and/or the same row can be located at different positions in the corresponding second virtual area VR2, for example, the second node P2 and the corresponding second virtual area VR2 The distances between the upper sides (or lower sides) of the region VR2 extending along the second direction D2 are different from each other, and the second node P2 and the left side (or the lower side) of the corresponding second virtual region VR2 extending along the first direction D1 are different from each other. or right side) are different from each other. Through this design, the second quadrilateral Q2 in the same row and column can have an irregular shape, thereby forming an irregular grid pattern. The method of forming the irregular second quadrilateral Q2 may be, for example, the same as or similar to the above-mentioned method of forming the first quadrilateral Q1 , and therefore will not be described in detail here. The first virtual area VR1 and/or the second virtual area VR2 may, for example, have 100×100 or 1000×1000 points or other suitable point arrays, and the node may be a point randomly selected from the point array.

As shown in Figure 3, in a first quadrilateral Q1, the four first grid lines L1 corresponding to the same first node P1 may have four included angles θ11, θ12, θ13, θ14 (or included angles θ11', θ12' , θ13', θ14'), where each included angle θ11, θ12, θ13, θ14 is the angle between any two adjacent ones of the four first grid lines L1, and the included angle θ11, θ12, θ13, θ14 (or Any two of the included angles θ11', θ12', θ13', θ14') may be different from each other. One of the included angles θ11, θ12, θ13, and θ14 (or the included angles θ11', θ12', θ13', and θ14') may be greater than 30 degrees, for example. In addition, two included angles facing the same direction in two adjacent first quadrilaterals Q1 (or two included angles corresponding to two adjacent first nodes P1 and facing the same direction) (for example, included angle θ11, included angle θ11', included angle θ12 The included angle θ12', the included angle θ13 and the included angle θ13', or the included angle θ14 and the included angle θ14') may be different from each other to reduce the consistency of the first quadrilateral Q1, thereby reducing the occurrence of moiré patterns. In some embodiments, the two included angles facing the same direction in the two first quadrilaterals Q1 may be, for example, an obtuse angle greater than 90 degrees and an acute angle less than 90 degrees, but are not limited thereto.

Similarly, in a second quadrilateral Q2, the four second grid lines L2 corresponding to the same second node P2 may have four included angles θ21, θ22, θ23, θ24 (or included angles θ21', θ22', θ23', θ24'), where each included angle θ21, θ22, θ23, θ24 is the angle between any two adjacent ones of the four second grid lines L2, and the included angle θ21, θ22, θ23, θ24 (or the included angle θ21', Any two of θ22', θ23', θ24') may be different from each other. One of the included angles θ21, θ22, θ23, and θ24 (or the included angles θ21', θ22', θ23', and θ24') may be greater than 30 degrees, for example. In addition, two included angles facing the same direction in two adjacent second quadrilaterals Q2 (or two included angles corresponding to two adjacent second nodes P2 and facing the same direction) (for example, the included angle θ21 and the included angle θ21', the included angle θ22 and the included angle θ22', the included angle θ23 and the included angle θ23', or the included angle θ24 and the included angle θ24') may be different from each other. In some embodiments, the two included angles facing the same direction in the two second quadrilaterals Q2 may be, for example, an obtuse angle greater than 90 degrees and an acute angle less than 90 degrees, but are not limited thereto.

In addition, in a top view (viewed along the top view direction TD), the first grid line L1 and the second grid line L2 corresponding to an intersection point CP can form two pairs of included angles (a pair of included angles α and a pair of included angles β or a pair of included angles α ' and a pair of included angles β'), and each pair of included angles α (or included angles β, α', β') are opposite and the same to each other. Furthermore, the sum of adjacent angles α and angles β (or angles α’ and angles β’) is 180 degrees. In some embodiments, two included angles corresponding to two adjacent intersection points CP and facing the same direction (for example, the included angle α and the included angle α' or the included angle β and the included angle β') may be different from each other.

It is worth noting that through the above-mentioned design of nodes and grid lines, the node positions, grid line lengths and included angles may not be repeatable or periodic, so that the first grid electrode 141 and the second grid electrode 161 may have non-periodic characteristics. The irregular grid pattern is therefore less likely to interfere with the periodically arranged pixels in the display panel to produce moiré patterns, thereby improving the transparency or optical properties of the touch panel 1 . Moreover, by designing quadrilateral meshes in both the first metal layer 14 and the second metal layer 16, the impedance of the first mesh electrode 141 can be similar or the same as the impedance of the second mesh electrode 161, and different The capacitance of the sensing unit SU can also be similar or the same, so that the electrical uniformity and stability of the touch panel 1 can be maintained and meet the specifications of the product application. In addition, through the above-mentioned grid design, the alignment error between the first metal layer 14 and the second metal layer 16 will not affect the visual effect of the touch panel 1 , thereby reducing the manufacturing difficulty or improving the manufacturing efficiency.

As shown in FIGS. 1 and 2 , the first metal layer 14 may optionally further include a plurality of first dummy electrodes 142 extending along the first direction D1, and each first grid electrode 141 is respectively disposed on two phases. The adjacent first dummy electrodes 142 are separated from each other by a fifth interval S5. Viewed along the top view direction TD, the first dummy electrodes 142 may be interleaved with the second grid electrodes 161 . In one embodiment, the first dummy electrode 142 may have an irregularly shaped grid pattern. Specifically, the first dummy electrode 142 may include a plurality of third grid lines L3 and a plurality of third nodes P3, and the third grid lines L3 may be connected through the third nodes P3 and A plurality of irregular quadrilaterals are surrounded, so that each first dummy electrode 142 has an irregular-shaped grid pattern. Since the third node P3 may be disposed in the first virtual region VR1, and the conditions of the quadrilateral of the first dummy electrode 142 may be similar or identical to the conditions of the first quadrilateral Q1, no further details are given here. It should be noted that the third grid line L3 adjacent to the first grid electrode 141 may extend along the same straight line as the outermost first grid line L1 of the first grid electrode 141, so that the first grid electrode 141 and the third grid line L3 may extend along the same straight line. A dummy electrode 142 can form an approximately trapezoidal pattern, so the first grid electrode 141 and the first dummy electrode 142 can present a uniform visual effect.

In this embodiment, the second metal layer 16 may optionally further include a plurality of second dummy electrodes 162 extending along the second direction D2, and each second grid electrode 161 is respectively disposed on two adjacent second dummy electrodes 162 . The electrodes 162 are separated from the second dummy electrode 162 by a sixth interval S6. Moreover, when viewed along the top view direction TD, the second dummy electrodes 162 may intersect with the first dummy electrodes 142 and the first grid electrodes 141 . Specifically, the second dummy electrode 162 may include a plurality of fourth grid lines L4 and a plurality of fourth nodes P4, and the fourth grid lines L4 may be connected through the fourth nodes P4 and surround a plurality of irregular quadrilaterals, so that Each second dummy electrode 162 has an irregularly shaped grid pattern. Since the fourth node P4 may be disposed in the second virtual region VR2, and the conditions of the quadrilateral of the second dummy electrode 162 may be similar or identical to the conditions of the second quadrilateral Q2, no further details are given here. It should be noted that the fourth grid line L4 adjacent to the second grid electrode 161 may extend along the same straight line as the outermost second grid line L2 of the second grid electrode 161, so that the second grid electrode 161 and the second grid line L2 are aligned with each other. The two dummy electrodes 162 can form an approximately trapezoidal pattern, so the second grid electrode 161 and the second dummy electrode 162 can present a uniform visual effect.

In some embodiments, as shown in FIG. 1 , the touch panel 1 may selectively include a plurality of first connection electrodes 18 and a plurality of second connection electrodes 20 , wherein the first connection electrodes 18 may be respectively provided and connected to the first connection electrodes 18 and the second connection electrodes 20 . One or both ends of a mesh electrode 141 are used to electrically connect the first mesh electrode 141 to the pad or control element, and the second connection electrodes 20 can be respectively disposed and connected to one end or both ends of the second mesh electrode 161 to electrically connect the second mesh electrode 161 to the pads or control elements.

Please refer to FIGS. 4 and 5 , which illustrate schematic cross-sectional views of touch panels according to different embodiments of the present invention. As shown in Figure 4, in the touch panel 1a of an embodiment, 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 also include an insulating layer 22, It is disposed between the first metal layer 14 and the second metal layer 16 to electrically insulate the first metal layer 14 and the second metal layer 16 . The order in which the first metal layer 14 and the second metal layer 16 are disposed on the substrate 12 of the present invention is not limited to Figure 4, and the positions of the two can also be interchanged with each other. The stacking structure of the touch panel of the present invention is not limited to this. As shown in FIG. 5, 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, so the substrate 12 can be used to combine the first metal layer 14 with the second metal layer 16. Layer 14 is electrically insulated from 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 first, and then adhered to each other through adhesion, but this is not a limitation.

To sum up, in the touch panel of the present invention, since the node positions and the lengths and angles of the grid lines are not repeatable or periodic, the first grid electrode and the second grid electrode can have non-periodic patterns. The irregular grid pattern prevents moiré patterns from interfering with the periodically arranged pixels in the display panel. Moreover, by designing quadrilateral meshes in both the first metal layer and the second metal layer, the impedance of the first mesh electrode can be similar or the same as the impedance of the second mesh electrode, and the impedance of different sensing units can be The capacitances can also be similar or identical, thereby maintaining the electrical uniformity and stability of the touch panel and meeting the specifications of the product application.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the patentable scope of the present invention shall fall within the scope of the present invention.

1:Touch panel

12:Substrate

14: First metal layer

141: First grid electrode

142: First dummy electrode

16: Second metal layer

161: Second grid electrode

162: Second dummy electrode

18: First connection electrode

20: Second connection electrode

D1: first direction

D2: second direction

R1:Region

SU: sensing unit

TD: looking down direction

Claims (12)

A touch panel includes: a substrate having a plurality of first virtual areas and a plurality of second virtual areas, wherein the first virtual areas are separated from each other and arranged in an array, and the second virtual areas are separated from each other Separated and arranged in the array, the first virtual areas and the second virtual areas are arranged in a staggered manner, and one of the first virtual areas is connected to one of the adjacent second virtual areas. The projection in a first direction and the projection in a second direction have a first interval and a second interval respectively; a first metal layer is provided on the substrate, and the first metal layer includes a plurality of strips A first grid electrode extending along the first direction, wherein each first grid electrode 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 quadrilaterals, so that each first grid electrode has an irregularly shaped grid pattern, wherein in a top view of the touch panel, each first node is provided respectively in one of the corresponding first virtual regions; 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 strips along the first metal layer. Second grid electrodes extending in two directions, wherein the first grid electrodes intersect with the second grid electrodes in the top view, and each second grid electrode includes a plurality of second grid lines and a plurality of third grid electrodes. two nodes, and the second grid lines are connected through the second nodes and surround a plurality of second quadrilaterals, so that each second grid electrode has another grid pattern of irregular shape, wherein in the In the top view, each second node is respectively disposed in one of the corresponding second virtual areas, wherein in the top view, one of the first mesh electrodes and one of the second mesh electrodes One has a plurality of intersection points, and the one of the first grid electrodes and the one of the second grid electrodes have two included angles, respectively corresponding to two adjacent ones of the equal intersection points. facing the same direction, and the included angles are different from each other. The touch panel of claim 1, wherein the first grid lines intersect with the second grid lines respectively in the top view. The touch panel of claim 1, wherein one of the first nodes is connected to four of the first grid lines, the four of the first grid lines have another four included angles, and the Two of the other four included angles are different. The touch panel of claim 3, wherein one of the other four included angles is greater than 30 degrees. The touch panel of claim 1, wherein each second node is connected to four of the second grid lines, the four of the second grid lines have four other included angles, and the other four Two of the included angles are different. The touch panel of claim 5, wherein one of the other four included angles is greater than 30 degrees. The touch panel of claim 1, wherein two of the first quadrilaterals respectively have two other included angles, the other two included angles face the same direction, and the other two included angles are different from each other. The touch panel of claim 1, wherein two of the second quadrilaterals respectively have two other included angles, the other two included angles face the same direction, and the other two included angles are different from each other. The touch panel of claim 1, wherein the first metal layer further includes a plurality of first dummy electrodes, and one of the first grid electrodes is disposed adjacent to the first dummy electrodes. between two. The touch panel of claim 9, wherein the second metal layer further includes a plurality of second dummy electrodes, and one of the second grid electrodes is disposed on two adjacent ones of the second dummy electrodes. between them, and in the top view, one of the second dummy electrodes intersects with one of the first dummy electrodes. The touch panel of claim 1, wherein the first virtual areas have a first pitch in the first direction, and the width of one of the first virtual areas in the first direction is equal to The ratio of the first pitch is less than 0.6, the second virtual areas have a second pitch in the first direction, and the width of one of the second virtual areas in the first direction is equal to the width of the second virtual area in the first direction. The ratio of the second pitch is less than 0.6. The touch panel of claim 1, wherein the first virtual areas have a third pitch in the second direction, and the width of one of the first virtual areas in the second direction is equal to The ratio of the third pitch is less than 0.6, the second virtual areas have a fourth pitch in the second direction, and the width of one of the second virtual areas in the second direction is equal to the width of the second virtual area in the second direction. The fourth pitch ratio is less than 0.6.

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