TWI654548B - Touch device - Google Patents

Abstract

A touch device includes a substrate, a main touch sensing structure, a first electrode, a second electrode, a first conductive element electrically connected to the first electrode, and a second conductive element electrically connected to the second electrode. The substrate has a primary touch area and a secondary touch area. The main touch sensing structure is disposed in the main touch area. The first electrode and the second electrode are disposed in the secondary touch area and are electrically independent of each other. The second conductive element includes a plurality of branch portions and a plurality of conductive portions. The plurality of bifurcation portions are located on opposite sides of the first conductive element, respectively. Each of the plurality of conductive portions is electrically connected between the plurality of branch portions. The plurality of conductive portions are separated from each other and straddle the first conductive element to form an intersection between the first conductive element and the second conductive element.

Description

Touch device

The invention relates to an electronic device, and more particularly to a touch device.

Touch devices can be roughly classified into in-cell, on-cell, and out-cell. The external touch device has the advantage of being easy to assemble with an existing display panel, so it is also a touch device that is widely used. However, one of the most criticized shortcomings of the plug-in touch device is that it is too thick. Therefore, an OGS (one glass solution) touch device in which a touch sensing structure is directly formed on a cover glass has been developed.

Generally speaking, a touch device includes a primary touch sensing structure disposed in a primary touch area and a secondary touch sensing structure disposed in a secondary touch area. Both the primary touch sensing structure and the secondary touch sensing structure need to be electrically connected to the pads located in the peripheral area by using conductive elements. However, in order to save the layout area, a plurality of conductive elements that are electrically connected to the first electrode of the secondary touch sensing structure and the second electrode of the secondary touch sensing structure must be interleaved, respectively. Due to the high capacitance value formed by the interleaving of multiple conductive elements, the touch sensitivity of the touch device is not good.

The invention provides a touch device with excellent touch sensitivity.

The touch device of the present invention includes a substrate, a main touch sensing structure, at least one first electrode, at least one second electrode, a first conductive element, and a second conductive element. The substrate has a main touch area, at least one touch area, and peripheral areas outside the main touch area and the secondary touch area. The main touch sensing structure is disposed in the main touch area. The first electrode and a second electrode are disposed in the secondary touch area. The first electrode and the second electrode are electrically independent of each other. The first conductive element is electrically connected to at least one first electrode. The second conductive element is electrically connected to the at least one second electrode and has at least one staggered position with the first conductive element. The second conductive element includes a plurality of branch portions and a plurality of conductive portions. The plurality of bifurcation portions are located on opposite sides of the first conductive element, respectively. The plurality of conductive portions are separated from each other and cross the first conductive element to form a staggered place. The plurality of conductive portions are respectively electrically connected between the plurality of branch portions located on opposite sides of the first conductive element.

In an embodiment of the present invention, the touch device further includes an insulating layer. The insulating layer has a plurality of through holes. The insulating layer covers the bifurcation portions of the first conductive element and the second conductive element at the intersection. The conductive portion of the second conductive element is disposed on the insulation layer and is electrically connected to the branch portion through the through hole.

In an embodiment of the present invention, each branching portion of the second conductive element has an end point, and each end point overlaps with a through hole of the insulating layer.

In an embodiment of the present invention, the at least one first electrode and the at least one second electrode are composed of a light-transmitting material.

According to an embodiment of the present invention, the conductive portion of the second conductive element described above It consists of light-transmitting materials.

In an embodiment of the present invention, the at least one first electrode, the at least one second electrode, and the conductive portions of the second conductive element belong to the same film layer.

In an embodiment of the present invention, the above-mentioned main touch sensing structure includes a plurality of first touch electrodes and a plurality of second touch electrodes. The plurality of first touch electrodes are separated from each other and extend along the first direction. The plurality of second touch electrodes are separated from each other and extend along the second direction. The first direction intersects the second direction. Each first touch electrode has a plurality of first touch sensing pads. The at least one first electrode, the at least one second electrode, and the first touch sensing pad belong to the same film layer.

In an embodiment of the present invention, the touch device further includes a touch trace. The touch trace is disposed in the peripheral area and is electrically connected to the main touch sensing structure. The bifurcation portion of the second conductive element and the touch trace belong to the same film layer.

In an embodiment of the present invention, the touch device further includes a third electrode. The third electrode is disposed in the peripheral region and adjacent to the first conductive element and the second conductive element, wherein the third electrode is grounded and has a plurality of openings.

In an embodiment of the present invention, the bifurcation portion of the third electrode and the second conductive element belong to the same film layer.

In an embodiment of the present invention, the at least one first electrode and the at least one second electrode are adjacent to each other and configured to form a secondary touch sensing structure.

In an embodiment of the present invention, the at least one first electrode is a plurality of first electrodes, the at least one second electrode is a plurality of second electrodes, and the plurality of first electrodes and the plurality of second electrodes are used to constitute a plurality of first electrodes. Multiple touch sensing structures, and each touch The sensing structure includes a first electrode and a second electrode adjacent to each other.

In an embodiment of the present invention, the touch device further includes a third electrode. The third electrode is disposed in the peripheral region and is grounded. The third electrode is separated from the multiple touch sensing structures.

In an embodiment of the present invention, the multiple touch sensing structures include the first touch sensing structure and the second touch sensing structure. The second electrode of the first touch sensing structure is electrically connected to the second conductive element. The first electrode of the second touch sensing structure is electrically connected to the above-mentioned first conductive element.

In an embodiment of the present invention, the touch device further includes a first pad and a second pad. The first pad is disposed in a peripheral region of the substrate. The plurality of first electrodes of the plurality of secondary touch sensing structures are electrically connected to each other. The above-mentioned first conductive element is electrically connected between the plurality of first electrodes of the plurality of secondary touch sensing structures and the first pad. The second pad is disposed in a peripheral region of the substrate. The plurality of second electrodes of the multiple touch sensing structures are electrically connected to each other. The above-mentioned second conductive element is electrically connected between the plurality of second electrodes of the plurality of secondary touch sensing structures and the second pad.

Based on the above, the touch device according to an embodiment of the present invention can reduce the overlapping area of the first conductive element and the second conductive element at the intersection by using the branching portion and the conductive portion of the second conductive element. The overlap area of the first conductive element and the second conductive element becomes smaller at the intersection, so the capacitance value formed by the first conductive element and the second conductive element being staggered can be reduced, thereby improving the touch sensitivity of the touch device.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100‧‧‧ touch device

110‧‧‧ substrate

110a‧‧‧Main Touch Area

110b‧‧‧touch area

110c‧‧‧Peripheral area

122‧‧‧first touch electrode

122a‧‧‧The first touch sensing pad

122b‧‧‧First bridge

124‧‧‧Second touch electrode

124a‧‧‧Second touch sensing pad

124b‧‧‧Second bridge section

130‧‧‧ Insulation

130a, 130b‧‧‧ through hole

140‧‧‧Touch Trace

150‧‧‧first electrode

160‧‧‧Second electrode

170, 170-1, 170-2, 170-3, 170-4, 170-5‧‧‧ first conductive element

180‧‧‧Second conductive element

180a‧‧‧ Clearance

182‧‧‧Fork

182a‧‧‧Endpoint

184‧‧‧Conductive Section

192-1, 192-2, 192-5‧‧‧ first pad

194‧‧‧Second pad

196‧‧‧Third electrode

196a‧‧‧open

BM‧‧‧Decoration layer

BL‧‧‧ buffer layer

C‧‧‧ Intersection

131‧‧‧first insulating layer

132‧‧‧Second insulation layer

R1, R2‧‧‧partial

Tm‧‧‧Main touch sensing structure

Ts, Ts-1, Ts-2, Ts-3, Ts-4, Ts-5 ‧‧‧ touch sensing structures

x, y, z‧‧‧ directions

I-I ’, Ⅱ-Ⅱ’‧‧‧ hatching

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

FIG. 2 is a partially enlarged schematic diagram of a main touch area and a peripheral area of a touch device according to an embodiment of the present invention.

FIG. 3 is a partially enlarged schematic diagram of a secondary touch area and a peripheral area of a touch device according to an embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a touch device according to an embodiment of the present invention.

FIG. 1 is a schematic top view of a touch device according to an embodiment of the present invention. FIG. 2 is a partially enlarged schematic diagram of a main touch area and a peripheral area of a touch device according to an embodiment of the present invention. In particular, FIG. 2 corresponds to a partial R1 of FIG. 1. FIG. 3 is a partially enlarged schematic diagram of a secondary touch area and a peripheral area of a touch device according to an embodiment of the present invention. In particular, FIG. 3 corresponds to a partial R2 of FIG. 1. FIG. 4 is a schematic cross-sectional view of a touch device according to an embodiment of the present invention. In particular, Fig. 4 corresponds to the section line I-I 'of Fig. 2 and the section line II-II' of Fig. 3. It should be noted that the decoration layer BM (FIG. 4) is omitted in FIG. 1, FIG. 2, and FIG. 3 based on considerations clearly shown.

Please refer to FIGS. 1, 2, 3 and 4. The touch device 100 includes a substrate 110. The substrate 110 has a main touch area 110a, a secondary touch area 110b, and a peripheral area 110c outside the primary touch area 110a and the secondary touch area 110b. The main touch sensing structure Tm is disposed in the main touch area 110a. The secondary touch sensing structure Ts is disposed in the secondary touch area 110b. the first The conductive element 170, the second conductive element 180, the touch trace 140, the first pads 192-1, 192-2, 192-5, the second pad 194, and the decoration layer BM are disposed in the peripheral region 110c. Please refer to FIG. 1. For example, in this embodiment, the main touch area 110 a may be a continuous large-area area; the secondary touch area 110 b may include a plurality of small-area areas separated from each other. The small area is used to configure multiple secondary touch sensing structures Ts respectively; the peripheral area 110c may be an area located between the primary touch area 110a and the secondary touch area 110b, and an area between the multiple secondary touch areas 110b. The area between the secondary touch area 110b and the edge of the substrate 110 and the area between the primary touch area 110a and the edge of the substrate 110; however, the present invention is not limited thereto. The substrate 110 is mainly used to carry various components of the touch device 100. In this embodiment, the material of the substrate 110 is, for example, glass. However, the present invention is not limited to this. According to other embodiments, the material of the substrate 110 may be sapphire, organic polymer, or other applicable materials.

Please refer to FIGS. 1, 2 and 4. The touch device 100 includes a main touch sensing structure Tm disposed in the main touch area 110 a. In this embodiment, the main touch sensing structure Tm includes a plurality of first touch electrodes 122 and a plurality of second touch electrodes 124. The plurality of first touch electrodes 122 are separated from each other and extend along the first direction x. The plurality of second touch electrodes 124 are separated from each other and extend along the second direction y. The first direction x intersects the second direction y. For example, in this embodiment, the first direction x and the second direction y may be perpendicular, but the invention is not limited thereto.

In this embodiment, the first touch electrode 122 includes a plurality of first touch sensing pads 122a and a plurality of first bridge portions 122b. Each first bridge portion 122b is electrically connected between two adjacent first touch sensing pads 122a. Specifically, in this real In the embodiment, the touch device 100 further includes an insulating layer 130 covering the plurality of first bridge portions 122b and having a plurality of through holes 130a overlapping with both ends of each first bridge portion 122b. The touch sensing pad 122a is disposed on the insulating layer 130, and two adjacent first touch sensing pads 122a are electrically connected to the same first bridge portion 122b through a plurality of through holes 130a.

In this embodiment, the second touch electrode 124 includes a plurality of second touch sensing pads 124a and a plurality of second bridge portions 124b. Each second bridge portion 124b is electrically connected between two adjacent second touch sensing pads 124a. For example, in this embodiment, the second bridge portion 124b and the second touch sensing pad 124a may belong to the same film layer. In other words, in this embodiment, each second touch electrode 124 may be a continuous conductive pattern, but the invention is not limited thereto.

In this embodiment, the first bridge portion 122b of the first touch electrode 122 may selectively belong to the first conductive layer. The first touch sensing pad 122a of the first touch electrode 122 and the second touch sensing pad 124a and the second bridge portion 124b of the second touch electrode 124 can be formed on the insulating layer 130 simultaneously using the same process. In other words, in this embodiment, the first touch sensing pad 122a, the second touch sensing pad 124a, and the second bridge portion 124b may selectively belong to the same second conductive layer, but the present invention is not limited thereto. In this embodiment, the first conductive layer and the second conductive layer can be both selectively transparent conductive layers. The material of the transparent conductive layer may include metal oxides, such as: indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other suitable oxides, or at least the foregoing. Stacked layers of the two. However, the present invention is not limited thereto. According to other embodiments, the first conductive layer and / or the second conductive layer The layer may also be an opaque / reflective conductive layer.

It should be noted that the above-mentioned main touch sensing structure Tm is only used to illustrate the present invention and not to limit the present invention. In other embodiments, the main touch sensing structure Tm may be other Appropriate appearance.

Referring to FIG. 4, in this embodiment, the touch device 100 may optionally include a buffer layer BL, a decoration layer BM, a first insulating layer 131 and a second insulating layer 132. The buffer layer BL is disposed on the substrate 110. The decoration layer BM is disposed on the buffer layer BL. The first insulating layer 131 covers the decoration layer BM and the buffer layer BL. In this embodiment, the first bridge portion 122 b may be disposed on the first insulating layer 131. However, the present invention is not limited thereto. According to other embodiments, the touch device 100 may also omit the arrangement of the buffer layer BL and the first insulating layer 131, and the first bridge portion 122b may also be directly disposed on the substrate 110. The second insulating layer 132 covers the first touch sensing pad 122 a, the second bridge portion 124 b, and the conductive portion 184 of the second conductive element 180. In this embodiment, the decoration layer BM is, for example, a patterned light-shielding layer for shielding the first conductive element 170, the second conductive element 180, the touch trace 140, the first pads 192-1, 192-2, 192-5, second pad 194, and other components that are not intended to be perceived by the user. In this embodiment, the material of the decoration layer BM is, for example, resin, but the present invention is not limited thereto. According to other embodiments, the material of the decoration layer BM may also be ink, photoresist, other appropriate materials, or a combination of the foregoing materials. In this embodiment, the color of the decoration layer BM is, for example, black, but the present invention is not limited thereto. According to other embodiments, the color of the decoration layer BM may also be other colors (for example, white, gold, etc.) to make the touch The control device 100 has a personalized appearance.

Please refer to FIGS. 1, 2 and 4. In this embodiment, the touch device 100 A plurality of touch traces 140 are also included. The plurality of touch traces 140 are disposed in the peripheral area 110c and are electrically connected to the main touch sensing structure Tm. In detail, the plurality of touch traces 140 are electrically connected to the plurality of first touch electrodes 122 and the plurality of second touch electrodes 124 of the main touch sensing structure Tm, respectively. FIG. 2 and FIG. 4 depict a touch trace 140 connected to the first touch electrode 122 as an example. Those skilled in the art should be able to achieve the above and multiple A plurality of touch lines 140 electrically connected to a touch electrode 122 and a plurality of second touch electrodes 124 are not shown here one by one. Referring to FIG. 4, in this embodiment, the touch trace 140 may be disposed on a part of the first insulating layer 131 located on the decoration layer BM. However, the present invention is not limited thereto. In other embodiments, the touch trace 140 may also be directly disposed on the non-conductive decoration layer BM. In this embodiment, the touch trace 140 may belong to a metal layer. In other words, the material of the touch trace 140 is, for example, metal. However, the present invention is not limited thereto. In other embodiments, the material of the touch trace 140 may be other conductive materials or a combination of metal and other conductive materials.

Referring to FIG. 1, the touch device 100 includes a plurality of first electrodes 150 and a plurality of second electrodes 160. The plurality of first electrodes 150 and the plurality of second electrodes 160 are electrically independent from each other and are disposed in the plurality of secondary touch areas 110b. Specifically, in this embodiment, one of the first electrode 150 and the second electrode 160 (for example, the first electrode 150) is a transmission electrode (Tx). The other (eg, the second electrode 160) is a receiving electrode (Rx), and a first electrode 150 and a second electrode 160 adjacent to each other may form a secondary touch sensing structure Ts. In this embodiment, the touch device 100 includes separate configurations Multiple sub-touch sensing structures Ts in multiple sub-touch areas 110b. FIG. 1 depicts five sub-touch sensing structures Ts-1, Ts-2, Ts-3, Ts-4, and Ts-5 as examples, but the present invention is not limited to this. The settings of the sub-touch sensing structure Ts The quantity depends on the actual demand. In this embodiment, the first electrode 150 and the second electrode 160 of the same touch sensing structure Ts may be an I-shaped conductive pattern and an irregular conductive pattern that substantially surrounds the I-shaped conductive pattern, but The present invention is not limited to this, the shape of the first electrode 150 and the shape of the second electrode 160 may be determined according to actual needs.

In this embodiment, the first electrode 150 and the second electrode 160 are made of a light-transmitting material. The sub-touch sensing structure Ts formed by the adjacent first electrodes 150 and the second electrodes 160 overlaps the transparent hole (not shown) of the decoration layer BM. In other words, the adjacent first electrodes 150 The sub-touch sensing structure Ts formed with the second electrode 160 and the decoration layer BM do not overlap in the direction of the vertical substrate. The light beam from the inside of the system (for example, the center console of a car) with the touch device 100 can pass through the transparent hole of the decorative layer BM and the secondary touch sensing structure Ts, and the secondary touch sensing structure Ts can be regarded as The light-emitting touch-sensing key (for example, a volume adjustment key) is used to sense whether the user touches the touch-sensing structure Ts a second time, and then performs a corresponding action (for example, adjusting a volume).

Please refer to FIGS. 1, 2 and 4. In this embodiment, the first and second electrodes 150 and 160 of the secondary touch sensing structure Ts and the second touch sensing pad of the primary touch sensing structure Tm 124a, the second bridge portion 124b, and the first touch sensing pad 122a may selectively belong to the same conductive layer (for example, the second conductive layer). In other words, in this embodiment, the first electrode 150 and the second electrode 160 of the secondary touch sensing structure Ts may be fabricated together with a part of the primary touch sensing structure Tm, and the setting of the secondary touch sensing structure Ts may be The process steps of the touch device 100 are not added, but the present invention is not limited thereto.

Please refer to FIGS. 1, 3 and 4. The touch device 100 includes a plurality of first conductive elements 170. The plurality of first conductive elements 170 are electrically connected to the plurality of first electrodes 150 of the plurality of sub-touch sensing structures Ts, respectively. In this embodiment, the plurality of first conductive elements 170 that are respectively electrically connected to the plurality of first electrodes 150 of different secondary touch sensing structures Ts may be electrically connected together or not electrically connected together. . Please refer to FIG. 1. For example, in this embodiment, the first conductive element 170-1 electrically connected to the first electrode 150 of the secondary touch sensing structure Ts-1 and the secondary touch sensing structure Ts- The first conductive elements 170-2 electrically connected to the first electrodes 150 of 2 may be electrically independent of each other. A first conductive element 170 that is electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-3 and a first conductive element 170 that is electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-2 -2 can be electrically connected to each other. The first conductive element 170 electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-4 and the first conductive element 170 electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-1 -1 can be electrically connected to each other. The first conductive element 170-5 electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-5 may be electrically independent of the first conductive elements 170-1, 170-2, 170-3, and 170-4. However, the present invention is not limited to this. In this embodiment, the first conductive element 170 electrically connected to the secondary touch sensing structure Ts and the touch trace 140 electrically connected to the primary touch sensing structure Tm may selectively belong to the same film layer (for example, : Metal layer), but the invention is not limited to this.

In this embodiment, the touch device 100 further includes a first bounding pad 192-1 disposed in the peripheral region 110c. First touch of the secondary touch sensing structure Ts-1 The electrode 150 and the first electrode 150 of the sub-touch sensing structure Ts-4 are electrically connected to each other, and the first conductive element 170-1 is electrically connected to the first electrode 150 and the first electrode 150 of the sub-touch sensing structure Ts-1. Between a pad 192-1 and the first electrode 150 and the first pad 192-1 of the secondary touch sensing structure Ts-4. In other words, the plurality of first electrodes 150 respectively belonging to different touch sensing structures Ts-1 and Ts-4 may be selectively electrically connected to the same first pad 192-1. However, the present invention is not limited thereto. The plurality of first electrodes 150 belonging to different touch sensing structures Ts-1, Ts-2, and Ts-5 may also be electrically connected to different first pads, respectively. 192-1, 192-2, 192-5. For example, in this embodiment, the touch device 100 further includes a first pad 192-2 disposed in the peripheral region 110c and located outside the first pad 192-1. The first electrodes 150 of the sub-touch sensing structure Ts-1 and the first electrodes 150 of the sub-touch sensing structure Ts-2 can pass through the first conductive elements 170-1 and 170-2 respectively. Connected to the first pad 192-1 and the first pad 192-2.

Please refer to FIGS. 1, 3 and 4. The touch device 100 includes a second conductive element 180. The second conductive element 180 is electrically connected to the second electrode 160 and has at least one intersection C between the second electrode 160 and the at least one first conductive element 170. For example, in this embodiment, the second conductive element 180 is electrically connected to the second electrode 160 of the secondary touch sensing structure Ts-1, the second conductive element 180 and the secondary touch sensing structure Ts-1 The first conductive element 170-1 electrically connected to the first electrode 150 and the first conductive element 170-2 electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-2 have an intersection C. In other words, in this embodiment, the second conductive element 180 may be electrically connected to the first conductive element 170-1 that is electrically connected to the first electrode 150 of the secondary touch sensing structure Ts-1 to which it belongs. The second conductive element 180 may be staggered with the first conductive element 170-2 that is electrically connected to the first electrode 150 of the second touch-sensing structure Ts-2, which is not itself. However, the present invention is not limited thereto. In another embodiment, the second conductive element 180 may also be only the first conductive element that is electrically connected to the first electrode 150 of the secondary touch sensing structure Ts-1 to which it belongs. 170-1 is interlaced; in yet another embodiment, the second conductive element 180 may be only the first conductive element 170- which is electrically connected to the first electrode 150 of the sub-touch sensing structure Ts-2 that is not itself. 2 staggered; the number and type of the first conductive elements 170 staggered with the second conductive element 180 may be other suitable designs depending on the actual layout, which is not limited in the present invention.

The second conductive element 180 includes a plurality of branch portions 182 and a plurality of conductive portions 184. The plurality of branch portions 182 are respectively located on opposite sides of the first conductive element 170. The plurality of conductive portions 184 are separated from each other and cross the first conductive element 170 to form a staggered portion C. The plurality of conductive portions 184 are respectively electrically connected between the plurality of branch portions 182 located on opposite sides of the first conductive element 170. For example, in this embodiment, the insulating layer 130 covers the branching portion 182 of the first conductive element 170 and the second conductive element 180 at the intersection C, and the insulating layer 130 has a branching portion 182 from the second conductive element 180. The plurality of through-holes 130b whose end points 182a overlap each other. The conductive portion 184 of the second conductive element 180 is disposed on the insulating layer 130 and is electrically connected to the plurality of branch portions 182 through the plurality of through-holes 130b. In this embodiment, the branching portion 182 and the touch trace 140 of the first conductive element 170 and the second conductive element 180 may both belong to the metal layer, and the conductive portion 184 and the secondary touch sensing structure of the second conductive element 180 First electrode 150 and second electrode 160 of Ts, second touch sensing pad 124a, second bridge portion 124b of main touch sensing structure Tm, and The first touch sensing pad 122a may selectively belong to the same conductive layer (for example, the second conductive layer), but the present invention is not limited thereto.

In the present embodiment, the plurality of conductive portions 184 of the second conductive element 180 are separated from each other. In a direction y parallel to the extending direction of the first conductive element 170, there is at least one gap 180a between the plurality of conductive portions 184 (labeled in FIG. 3). In a direction z perpendicular to the substrate 110, a part of the first conductive element 170 overlaps the gap 180a. The second conductive element 180 is separated from each other by a plurality of conductive portions 184 and is electrically connected to a plurality of branch portions 182 respectively located on opposite sides of the first conductive element 170. Thereby, at the intersection C of the first conductive element 170 and the second conductive element 180, the overlapping area of the first conductive element 170 and the second conductive element 180 in the direction z becomes smaller. The overlapping area of the first conductive element 170 and the second conductive element 180 becomes smaller, so the capacitance value formed by the interleaving of the first conductive element 170 and the second conductive element 180 becomes smaller, which can improve the touch device 100. Touch sensitivity.

Referring to FIG. 1, in this embodiment, the touch device 100 further includes a second pad 194 disposed in the peripheral region 110 c. The plurality of second electrodes 160 of the plurality of sub-touch sensing structures Ts may be electrically connected to each other, and the second conductive element 180 may be electrically connected to the plurality of second electrodes 160 of the plurality of sub-touch sensing structures Ts and Second pad 194. In other words, in this embodiment, the multiple second electrodes 160 of all the secondary touch sensing structures Ts can be electrically connected to the same second pad 194, but the invention is not limited thereto.

Please refer to FIGS. 1 and 3. In this embodiment, the touch device 100 further includes a third electrode 196. The third electrode 196 is disposed in the peripheral region 110 c and is adjacent to the first conductive element 170 and the second conductive element 180. Furthermore, the third electrode 196 The multiple touch sensing structures Ts are separated. In this embodiment, the bifurcation portion 182 and the touch trace 140 of the third electrode 196 and the second conductive element 180 may belong to the same metal layer, but the present invention is not limited thereto. It is worth noting that, in this embodiment, the third electrode 196 is grounded and has a plurality of openings 196a. In this embodiment, the shape of the opening 196a is rectangular. However, the present invention is not limited to this. In other embodiments, the shape of the opening 196a may be other suitable shapes, such as square, polygon, circle, and oval. Wait. In other words, the physical area of the third electrode 196 is small. Thereby, the capacitance value formed by the secondary touch sensing structure Ts and the third electrode 196 is small, and the touch sensitivity of the touch device 100 can be further improved. Moreover, with this design, it is possible to reduce the yield loss due to static electricity.

In summary, a touch device according to an embodiment of the present invention includes a first electrode and a second electrode disposed in a secondary touch area, a first conductive element electrically connected to the first electrode, and a second electrode electrically connected to the first electrode. Of the second conductive element. There is at least one staggered place between the second conductive element and the first conductive element. The second conductive element includes a plurality of branch portions and a plurality of conductive portions. The plurality of bifurcation portions are located on opposite sides of the first conductive element, respectively. The plurality of conductive portions are separated from each other and straddle the first conductive element to form an intersection between the second conductive element and the first conductive element. The plurality of conductive portions are respectively electrically connected between the plurality of branch portions located on opposite sides of the first conductive element. The bifurcation portion and the conductive portion of the second conductive element make the overlapping area of the first conductive element and the second conductive element smaller at the intersection. The overlapping area of the first conductive element and the second conductive element becomes smaller at the intersection. Therefore, the capacitance value formed by staggering the first conductive element and the second conductive element can be reduced, thereby improving the touch sensitivity of the touch device.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (15)

A touch device includes: a substrate having a main touch area, at least one touch area, and the main touch area and a peripheral area outside the secondary touch area; and a main touch sensing structure disposed on the main touch area. A main touch area; at least one first electrode and at least one second electrode are disposed in the secondary touch area, wherein the at least one first electrode and the at least one second electrode are electrically independent of each other; a first conductive element, Electrically connected to the at least one first electrode; and a second conductive element electrically connected to the at least one second electrode and having at least one staggered place with the first conductive element, wherein the second conductive element includes : A plurality of bifurcation portions, which are respectively located on opposite sides of the first conductive element; and a plurality of conductive portions, which are separated from each other and cross the first conductive element to form the staggered place, and are electrically connected to the first conductive element respectively. Between the bifurcation portions on opposite sides of a conductive element. The touch device according to item 1 of the scope of patent application, further comprising: an insulating layer having a plurality of through holes, wherein the insulating layer covers the first conductive element and the second conductive element at the intersection. Fork portions, the conductive portions of the second conductive element are disposed on the insulating layer and are electrically connected to the branch portions through the through holes. The touch device according to item 2 of the scope of patent application, wherein each branch of the second conductive element has an end point, and each of the end points overlaps with the through holes of the insulating layer. The touch device according to item 1 of the scope of patent application, wherein the at least one first electrode and the at least one second electrode are made of a light-transmitting material. The touch device according to item 1 of the scope of patent application, wherein the conductive portions of the second conductive element are composed of a light-transmitting material. The touch device according to item 1 of the scope of patent application, wherein the at least one first electrode, the at least one second electrode, and the conductive portions of the second conductive element belong to the same conductive layer. The touch device according to item 1 of the patent application scope, wherein the main touch sensing structure includes: a plurality of first touch electrodes separated from each other and extending along a first direction; and a plurality of second touch The electrodes are separated from each other and extend along a second direction, wherein the first direction and the second direction are staggered, each first touch electrode has a plurality of first touch sensing pads, the at least one first electrode, The at least one second electrode and the first touch sensing pads belong to the same conductive layer. The touch device according to item 1 of the patent application scope further includes: a touch trace disposed in the peripheral area and electrically connected to the main touch sensing structure, wherein the second conductive elements are The bifurcation portion and the touch trace belong to the same film layer. The touch device according to item 1 of the scope of patent application, further comprising: a third electrode disposed in the peripheral region and adjacent to the first conductive element and the second conductive element, wherein the third electrode is grounded and With multiple openings. The touch device according to item 9 of the scope of patent application, wherein the third electrode and the branch portions of the second conductive element belong to the same film layer. The touch device according to item 1 of the scope of patent application, wherein the at least one first electrode and the at least one second electrode are adjacent to each other and are used to form a one-touch sensing structure. The touch device according to item 1 of the patent application scope, wherein the at least one first electrode is a plurality, the at least one second electrode is a plurality, and the first electrodes and the second electrodes are used to form a plurality Multiple touch sensing structures, and each of the secondary touch sensing structures includes a first electrode and a second electrode adjacent to each other. The touch device according to item 12 of the patent application scope further includes a third electrode disposed in the peripheral area and grounded, wherein the third electrode separates the touch sensing structures. The touch device according to item 12 of the application, wherein the touch sensing structures include: a first touch sensing structure, wherein a second touch sensing structure of the first touch sensing structure An electrode is electrically connected to the second conductive element; and a second touch sensing structure, wherein a first electrode of the second touch sensing structure is electrically connected to the first conductive element. The touch device according to item 12 of the scope of patent application, further comprising: a first pad disposed in the peripheral region of the substrate, wherein the first electrodes of the touch sensing structures are electrically connected to each other. And the first conductive element is electrically connected between the first electrodes of the touch sensing structures and the first pad; and a second pad disposed in the peripheral region of the substrate Wherein the second electrodes of the touch sensing structures are electrically connected to each other, and the second conductive element is electrically connected to the second electrodes of the touch sensing structures and the second connection Between pads.