CN111475055A - touch panel - Google Patents

Abstract

A touch panel comprises a substrate, a first conductive layer, a second conductive layer, an insulating layer, a plurality of first bonding pads and a plurality of second bonding pads. The first conductive layer has a plurality of first touch electrodes and a plurality of virtual electrodes. The plurality of first touch electrodes and the plurality of virtual electrodes are structurally separated from each other and arranged in a first direction. The second conductive layer has a plurality of second touch electrodes. The plurality of second touch electrodes are structurally separated from each other and arranged in a second direction. The first direction is staggered with the second direction. The insulating layer is disposed between the first conductive layer and the second conductive layer so that the plurality of first touch electrodes are electrically independent of the plurality of second touch electrodes. The plurality of first touch electrodes are electrically connected to the plurality of first bonding pads. The plurality of second touch electrodes are electrically connected to the plurality of virtual electrodes of the first conductive layer through a plurality of contact windows of the insulating layer, and the plurality of virtual electrodes are electrically connected to the plurality of second bonding pads.

Description

touch panel

technical field

The present invention relates to an electronic device, and in particular, to a touch panel.

Background technique

The touch panel has the advantage of convenient operation, so it is widely installed in electronic products (eg, mobile phones, tablet computers, satellite navigation, etc.). Generally speaking, a touch device may include a substrate, a plurality of first touch electrodes, a plurality of second touch electrodes, and a plurality of bonding pads, wherein the first touch electrodes are arranged in a first direction, and the plurality of second touch electrodes are arranged in a first direction. The control electrodes are arranged in the second direction, and the plurality of bonding pads are arranged in the first direction and are used for electrical connection with the touch driving circuit. In order to enable the second touch electrodes to be electrically connected to the bonding pads, peripheral traces must be arranged on the left and right sides of the touch area of the touch device, so that the width of the frame of the touch panel cannot be further reduced. If the width of the frame of the touch panel cannot be reduced, the width of the entire frame of the touch display device including the touch panel and the display panel cannot be reduced.

SUMMARY OF THE INVENTION

The present invention provides a touch panel with an ultra-narrow frame or even no frame on at least one side.

A touch panel of the present invention includes a substrate, a first conductive layer, a second conductive layer, an insulating layer, a plurality of first bonding pads and a plurality of second bonding pads. The substrate has a touch area and a peripheral area, wherein the peripheral area is located on one side of the touch area. The first conductive layer is disposed on the substrate, wherein the first conductive layer has a plurality of first touch electrodes and a plurality of dummy electrodes, and the plurality of first touch electrodes and the plurality of dummy electrodes are located in the touch area and are structurally separated from each other , a plurality of first touch electrodes and a plurality of dummy electrodes are arranged in the first direction, and each dummy electrode is disposed between two adjacent ones of the plurality of first touch electrodes. The second conductive layer is disposed on the substrate, wherein the second conductive layer has a plurality of second touch electrodes, the plurality of second touch electrodes are located in the touch area and are separated from each other in structure, and the plurality of second touch electrodes are in the first They are arranged in two directions, and the first direction and the second direction are staggered. The insulating layer is disposed between the first conductive layer and the second conductive layer, so that the plurality of first touch electrodes are electrically independent of the plurality of second touch electrodes. The insulating layer has a plurality of contact windows. The plurality of first bonding pads are disposed on the peripheral region of the substrate, wherein the plurality of first touch electrodes are electrically connected to the plurality of first bonding pads. A plurality of second bonding pads are disposed on the peripheral region of the substrate, wherein the plurality of second touch electrodes of the second conductive layer are electrically connected to the plurality of dummy electrodes of the first conductive layer through the plurality of contact windows of the insulating layer, and The plurality of dummy electrodes are electrically connected to the plurality of second bonding pads.

In an embodiment of the present invention, the dummy electrode has a first portion and a second portion, the first portion and the second portion are arranged in a second direction, and the first portion overlaps at least one contact window of the insulating layer and is electrically The second part is connected to the second bonding pad, the second part spans at least one second touch electrode, and the first part is disconnected from the second part.

In an embodiment of the present invention, the first conductive layer and the second conductive layer have a plurality of repeating structures arranged in an array in the touch area, a part of the first conductive layer of a repeating structure and a second conductive layer of the repeating structure A part of the layer has a coupling capacitance Cm, and Cm≤1.5pF.

In an embodiment of the present invention, each of the above-mentioned first touch electrodes has opposite first sides and second sides, and the plurality of dummy electrodes includes a plurality of first dummy electrodes and a plurality of second dummy electrodes. The first dummy electrodes are structurally separated from the plurality of second dummy electrodes, the plurality of first dummy electrodes are arranged on the plurality of first sides of the plurality of first touch electrodes, and the plurality of second dummy electrodes are arranged on the plurality of first touch electrodes A plurality of second sides of the touch electrodes, and a second touch electrode is electrically connected to a first dummy electrode and a second dummy electrode located on the first side and the second side of the same first touch electrode.

In an embodiment of the present invention, the above-mentioned plurality of dummy electrode groups include a plurality of first dummy electrodes and a plurality of second dummy electrodes, and each dummy electrode group includes a first side and a first side respectively located on the same first touch electrode. A first dummy electrode and a second dummy electrode on the second side; the touch area includes a first sub-touch area and a second sub-touch area outside the first sub-touch area, and each second touch electrode has The first part and the second part are respectively located in the first sub-touch area and the second sub-touch area; the first part and the second part of the second touch electrode are respectively electrically connected to different multiple dummy electrode groups.

In an embodiment of the present invention, each of the above-mentioned first touch electrodes has opposite first sides and second sides, and the plurality of dummy electrodes are disposed on the plurality of first sides of the plurality of first touch electrodes.

In an embodiment of the present invention, each of the above-mentioned first touch electrodes has opposite first sides and second sides, and the plurality of dummy electrodes includes a plurality of first dummy electrodes and a plurality of second dummy electrodes. The first dummy electrodes are arranged on the first sides of the first touch electrodes, and the second dummy electrodes are arranged on the second sides of the first touch electrodes; the touch area includes first sub-contacts The control area and the second sub-touch area outside the first sub-touch area, each of the second touch electrodes has a first part and a second part respectively located in the first sub-touch area and the second sub-touch area ; The first part and the second part of a second touch electrode are respectively electrically connected to a first dummy electrode and a second dummy electrode, and a first dummy electrode and the second dummy electrode are provided between At least one first touch electrode.

In an embodiment of the present invention, the above-mentioned touch area includes a first sub-touch area and a second sub-touch area outside the first sub-touch area, and each of the second touch electrodes includes a first sub-touch area respectively located in the first sub-touch area. The first part and the second part of the touch area and the second sub-touch area; the first part and the second part of the second touch electrode are separated in structure and are respectively electrically connected to a plurality of different dummy electrodes.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a touch display device 10 according to an embodiment of the present invention.

FIG. 2 is a schematic top view of the touch panel 100 according to the first embodiment of the present invention.

FIG. 3 shows the first conductive layer 120 on the touch area 110a of FIG. 2 .

FIG. 4 shows the second conductive layer 140 on the touch area 110a of FIG. 2 .

FIG. 5 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120 , and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 2 .

FIG. 6 is an enlarged schematic view of the staggered position R of FIG. 5 .

FIG. 7 is a schematic cross-sectional view of the touch panel 100 according to the first embodiment of the present invention.

FIG. 8 is an enlarged schematic view of the repeating structure U of FIG. 2 .

FIG. 9 is a schematic top view of the touch panel 100A according to the second embodiment of the present invention.

FIG. 10 shows the first conductive layer 120A on the touch area 110a of FIG. 9 .

FIG. 11 shows the second conductive layer 140 on the touch area 110a of FIG. 9 .

FIG. 12 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120A and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 9 .

FIG. 13 is a schematic top view of the touch panel 100B according to the third embodiment of the present invention.

FIG. 14 shows the first conductive layer 120B on the touch area 110a of FIG. 13 .

FIG. 15 shows the second conductive layer 140 on the touch area 110a of FIG. 13 .

FIG. 16 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120B and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 13 .

FIG. 17 is a schematic top view of the touch panel 100C according to the fourth embodiment of the present invention.

FIG. 18 shows the first conductive layer 120C on the touch area 110a of FIG. 17 .

FIG. 19 shows the second conductive layer 140 on the touch area 110a of FIG. 17 .

FIG. 20 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120C and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 17 .

FIG. 21 is a schematic top view of the touch panel 100D according to the fifth embodiment of the present invention.

FIG. 22 shows the first conductive layer 120D on the touch area 110a of FIG. 21 .

FIG. 23 shows the second conductive layer 140D on the touch area 110a of FIG. 21 .

FIG. 24 shows the second touch electrodes 142 of the second conductive layer 140D, the dummy electrodes 124 of the first conductive layer 120D, and the contact windows 132 of the insulating layer 130 on the touch area 110a of FIG. 21 .

Description of reference numbers:

10: Touch display device

100, 100A, 100B, 100C, 100D: touch panel

110: Substrate

110a: Touch area

110a-1: the first sub-touch area

110a-2: the second sub-touch area

110b: Surrounding area

120, 120A, 120B, 120C, 120D: the first conductive layer

122: The first touch electrode

124: Virtual Electrode

124a: Part 1

124b: Part II

124-1: First virtual electrode

124-2: Second virtual electrode

130: Insulation layer

132: Contact window

140, 140D: the second conductive layer

142: Second touch electrode

142a: Part 1

142b: Part II

144: Virtual Electrode

152: First bond pad

154: Second Bond Pad

200: Display panel

300: Adhesive layer

A-A': Section line

G: virtual electrode group

R: staggered region

L1: first wire

L2: Second wire

U: repeating structure

x: the first direction

y: the second direction

Detailed ways

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals are used in the drawings and description to refer to the same or like parts.

It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may refer to the existence of other elements between the two elements.

As used herein, "about," "approximately," or "substantially" includes the stated value and the average within an acceptable deviation from the particular value as determined by one of ordinary skill in the art, given the measurement in question and the A specified amount of measurement-related error (ie, a limitation of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, "about", "approximately" or "substantially" may be used to select a more acceptable range of deviation or standard deviation depending on optical properties, etching properties or other properties, and not one standard deviation may apply to all properties. .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be construed as having meanings consistent with their meanings in the context of the related art and the present invention, and are not to be construed as idealized or excessive Formal meaning, unless expressly defined as such herein.

FIG. 1 is a schematic cross-sectional view of a touch display device 10 according to an embodiment of the present invention.

Referring to FIG. 1 , the touch display device 10 includes a touch panel 100 and a display panel 200 , wherein the touch area 110 a of the touch panel 100 overlaps the display area 200 a of the display panel 200 .

The touch panel 100 includes a substrate 110 and a first conductive layer 120 , an insulating layer 130 and a second conductive layer 140 formed on the substrate 110 . For example, in this embodiment, the substrate 110 of the touch panel 100 may be a cover lens of the touch display device 10 , and the touch panel 100 may be attached to the display panel 200 by using the adhesive layer 300 . In other words, in this embodiment, the touch panel 100 may be an out-cell touch panel. However, the present invention is not limited thereto, and according to other embodiments, the touch panel 100 may also be an on-cell, in-cell or other type of touch panel.

FIG. 2 is a schematic top view of the touch panel 100 according to the first embodiment of the present invention.

FIG. 3 shows the first conductive layer 120 on the touch area 110a of FIG. 2 .

FIG. 4 shows the second conductive layer 140 on the touch area 110a of FIG. 2 .

FIG. 5 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120 , and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 2 .

FIG. 6 is an enlarged schematic view of the staggered position R of FIG. 5 .

FIG. 7 is a schematic cross-sectional view of the touch panel 100 according to the first embodiment of the present invention. Fig. 7 corresponds to the line A-A' of Fig. 6 .

FIG. 8 is an enlarged schematic view of the repeating structure U of FIG. 2 .

It should be noted that, for the sake of clarity, FIGS. 2 to 5 represent the grid-shaped first touch electrodes 122 , the grid-shaped dummy electrodes 124 , the grid-shaped first touch electrodes 124 and the grid-shaped The second touch electrodes 142 and the grid-shaped dummy electrodes 144 . In addition, FIG. 8 omits the illustration of the contact window 132 of the insulating layer 130 .

Referring to FIG. 2 , the touch panel 100 includes a substrate 110 . The substrate 110 has a touch area 110a and a peripheral area 110b, wherein the peripheral area 110b is located on one side of the touch area 110a. For example, in this embodiment, the peripheral area 110b may be an outer lead bonding (OLB) area located on the lower side of the touch area 110a. In this embodiment, the material of the substrate 110 may be glass, quartz, organic polymer or other applicable materials.

Referring to FIG. 2 and FIG. 3 , the touch panel 100 includes a first conductive layer 120 . The first conductive layer 120 is disposed on the substrate 110 . The first conductive layer 120 has a plurality of first touch electrodes 122 and a plurality of dummy electrodes 124 . The plurality of first touch electrodes 122 and the plurality of dummy electrodes 124 are located on the touch area 110a of the substrate 110 and are structurally separated from each other. The plurality of first touch electrodes 122 and the plurality of dummy electrodes 124 are arranged in the first direction x, and each dummy electrode 124 is disposed between two adjacent first touch electrodes 122 .

Referring to FIG. 2 and FIG. 8 , for example, in this embodiment, the first touch electrodes 122 and the dummy electrodes 124 may be a plurality of grid electrodes formed by interlacing a plurality of first wires L1 . In this embodiment, the first conductive layer 120 may be a first metal layer; that is, the first touch electrodes 122 and the dummy electrodes 124 may be a plurality of metal mesh electrodes, but the present invention does not This is limited.

Referring to FIG. 2 and FIG. 4 , the touch panel 100 further includes a second conductive layer 140 . The second conductive layer 140 is disposed on the substrate 110 . The second conductive layer 140 has a plurality of second touch electrodes 142 . One of the first touch electrodes 122 and the second touch electrodes 142 is a transmission (Transmission; Tx) electrode. The other of the first touch electrodes 122 and the second touch electrodes 142 is a reception (Reception; Rx) electrode. The plurality of second touch electrodes 142 are located on the touch area 110a of the substrate 110, and the plurality of second touch electrodes 142 are structurally separated from each other. The plurality of second touch electrodes 142 are arranged in the second direction y, and the first direction x and the second direction y are staggered. That is to say, the plurality of first touch electrodes 122 and the plurality of second touch electrodes 142 are arranged alternately. For example, in this embodiment, the first direction x and the second direction y are substantially perpendicular, but the invention is not limited to this.

In this embodiment, the second conductive layer 140 further includes a plurality of dummy electrodes 144 . The plurality of second touch electrodes 142 and the plurality of dummy electrodes 144 are located on the touch area 110a of the substrate 110 and are structurally separated from each other. The plurality of second touch electrodes 142 and the plurality of dummy electrodes 144 are arranged in the second direction y, and each dummy electrode 144 is disposed between two adjacent second touch electrodes 142 .

Referring to FIG. 2 and FIG. 8 , for example, in the present embodiment, the second touch electrodes 142 and the dummy electrodes 144 may be a plurality of grid electrodes formed by interweaving a plurality of second wires L2 . In this embodiment, the second conductive layer 140 may be a second metal layer; that is, the second touch electrodes 142 and the dummy electrodes 144 may be a plurality of metal mesh electrodes, but the present invention does not This is limited.

Please refer to FIG. 1 and FIG. 2 , the touch panel 100 further includes an insulating layer 130 . The insulating layer 130 is disposed between the first conductive layer 120 and the second conductive layer 140 , so that the plurality of first touch electrodes 122 of the first conductive layer 120 are electrically independent from the plurality of second contacts of the second conductive layer 140 Control electrode 142 . For example, in this embodiment, the material of the insulating layer 130 may be an inorganic material (eg, silicon oxide, silicon nitride, silicon oxynitride, or a stacked layer of at least two of the above-mentioned materials), an organic material, or a combination of the above-mentioned materials. .

Referring to FIG. 2 , the touch panel 100 further includes a plurality of first bonding pads 152 and a plurality of second bonding pads 154 . The first bonding pads 152 and the second bonding pads 154 are disposed in the peripheral region 110 b of the substrate 110 . The first bonding pad 152 and the second bonding pad 154 are located on one side of the touch area 110a. The first touch electrodes 122 are electrically connected to the first bonding pads 152 . The second touch electrodes 142 are electrically connected to the second bonding pads 154 . The first bonding pads 152 and the second bonding pads 154 are used for electrical connection with a touch driving circuit (not shown).

In this embodiment, the first bonding pads 152 can be fabricated by using the first conductive layer 120, the second conductive layer 140, other conductive layers (not shown), or a combination of at least two of the above; the second bonding pads 154 can be fabricated using The first conductive layer 120 , the second conductive layer 140 , other conductive layers (not shown), or a combination of at least two of the above are fabricated; the present invention is not limited.

Please refer to FIG. 2 , FIG. 5 , FIG. 6 and FIG. 7 , it is worth noting that the second touch electrodes 142 of the second conductive layer 140 are electrically connected to the first conductive layer 120 through the contact windows 132 of the insulating layer 130 The dummy electrode 124 is electrically connected to the second bonding pad 154 . In other words, the dummy electrodes 124 of the first conductive layer 120 are used as touch signal lines for the second touch electrodes 142; The dummy electrodes 124 are electrically connected to the second bonding pads 154 instead of being electrically connected to the second bonding pads 154 by peripheral traces disposed outside the touch area 110a. Therefore, the touch panel 100 has an ultra-narrow frame, which helps to reduce the width of the overall frame of the touch display device 10 .

Referring to FIG. 2 , FIG. 5 and FIG. 6 , in this embodiment, the dummy electrodes 124 of the first conductive layer 120 and the second touch electrodes 142 of the second conductive layer 140 are staggered to form a staggered region R (marked with in Figure 5 and Figure 6). In the staggered region R, the plurality of first wires L1 of the dummy electrodes 124 of the first conductive layer 120 and the plurality of second wires L2 of the second touch electrodes 142 of the second conductive layer 140 form M staggered points; On N staggered points of the staggered points, the first wires L1 of the dummy electrodes 124 and the second wires L2 of the second touch electrodes 142 are in electrical contact with each other; M and N are positive integers, and M≧N. Preferably, (N/M)≥50%, for example, in this embodiment, (N/M)=100%; The conductive lines L1 and the plurality of second conductive lines L2 of the second touch electrodes 142 are in electrical contact at all the intersections thereof, but the invention is not limited to this.

Referring to FIGS. 2 and 3 , in this embodiment, a dummy electrode 124 of the first conductive layer 120 has a first portion 124a and a second portion 124b (marked in FIG. 3 ), and the first portion 124a of a dummy electrode 124 has Aligned with the second portion 124b in the second direction y, the first portion 124a of the dummy electrode 124 of the first conductive layer 120 overlaps the contact window 132 of the insulating layer 130 and is electrically connected to the second bonding pad 154, the second portion 124b It spans at least one second touch electrode 142, and the first portion 124a and the second portion 124b are disconnected. Therefore, the probability of ghosting during the operation of the touch panel 100 can be reduced.

FIG. 8 shows a repeating structure U of the first conductive layer 120 and the second conductive layer 140 on the touch area 110a of FIG. 2 . 2 and FIG. 8 , the first touch electrodes 122 and the dummy electrodes 124 of the first conductive layer 120 on the touch area 110a and the second touch electrodes 142 and the dummy electrodes 144 of the second conductive layer 140 can be arranged in an array A part of the first conductive layer 120 and a part of the second conductive layer 140 of each repeating structure U have a coupling capacitance Cm, Cm≤1.5pF, which is beneficial to the driving of the touch panel 100 .

Referring to FIG. 2 and FIG. 5 , in this embodiment, each of the first touch electrodes 122 has a first side (eg: right side) and a second side (eg: left side) opposite to each other, and the first conductive layer 120 The plurality of dummy electrodes 124 include a plurality of first dummy electrodes 124-1 and a plurality of second dummy electrodes 124-2, and the plurality of first dummy electrodes 124-1 and the plurality of second dummy electrodes 124-2 are structurally separated , a plurality of first dummy electrodes 124-1 are arranged on a plurality of first sides (eg, right sides) of a plurality of first touch electrodes 122, and a plurality of second dummy electrodes 124-2 are arranged on a plurality of first touch electrodes 122 A plurality of second sides (eg, left sides) of the electrodes 122 , and each second touch electrode 142 is electrically connected to a first dummy electrode located on the first side and the second side of the same first touch electrode 122 124-1 and a second dummy electrode 124-2.

Referring to FIG. 5 , further, a plurality of first dummy electrodes 124 - 1 and a plurality of second dummy electrodes 124 - 2 may constitute a plurality of dummy electrode groups G, and each dummy electrode group G includes a plurality of first dummy electrodes located in the same first A first dummy electrode 124-1 and a second dummy electrode 124-2 on the first side and the second side of the touch electrode 122; the touch area 110a includes a first sub-touch area 110a-1 and a first sub-touch In the second sub-touch area 110a-2 outside the control area 110a-1, each of the second touch electrodes 142 has a first sub-touch area 110a-1 and a second sub-touch area 110a-2, respectively. part 142a and second part 142b; in this embodiment, the first part 142a and the second part 142b of the same second touch electrode 142 can be electrically connected to a plurality of first dummy electrodes of different dummy electrode groups G, respectively electrode 124-1 and a plurality of second dummy electrodes 124-2.

In other words, in this embodiment, the dummy electrodes 124 used as the touch signal lines of the same second touch electrodes 142 are disposed on opposite sides of the same first touch electrodes 122 and serve as the same second touch electrodes 142 . The plurality of dummy electrodes 124 used by the plurality of touch signal lines of the touch electrode 142 are the first sub-touch area 110a-1 and the second sub-touch area 110a-2 disposed on both sides of the touch area 110a.

It must be noted here that the following embodiments use the element numbers and part of the contents of the previous embodiments, wherein the same numbers are used to represent the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

FIG. 9 is a schematic top view of the touch panel 100A according to the second embodiment of the present invention.

FIG. 10 shows the first conductive layer 120A on the touch area 110a of FIG. 9 .

FIG. 11 shows the second conductive layer 140 on the touch area 110a of FIG. 9 .

FIG. 12 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120A and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 9 .

It should be noted that, for the sake of clarity, FIG. 9 to FIG. 12 represent the grid-shaped first touch electrodes 122 , the grid-shaped dummy electrodes 124 , and the grid-shaped second touch electrodes 142 with simple frames. and grid-shaped dummy electrodes 144 .

Please refer to FIG. 9 , FIG. 10 , FIG. 11 and FIG. 12 , the touch panel 100A of the second embodiment is similar to the touch panel 100 of the first embodiment. As shown in 12, the first portion 142a of a second touch electrode 142 is electrically connected to a dummy electrode group G, and the dummy electrode group G used as a touch signal line of a second touch electrode 142 is disposed in the The first sub-touch area 110a-1 on one side of the touch area 110a.

FIG. 13 is a schematic top view of the touch panel 100B according to the third embodiment of the present invention.

FIG. 14 shows the first conductive layer 120B on the touch area 110a of FIG. 13 .

FIG. 15 shows the second conductive layer 140 on the touch area 110a of FIG. 13 .

FIG. 16 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120B and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 13 .

It should be noted that, for the sake of clarity, FIG. 13 to FIG. 16 represent the grid-shaped first touch electrodes 122 , the grid-shaped dummy electrodes 124 , and the grid-shaped second touch electrodes 142 with simple frames. and grid-shaped dummy electrodes 144 .

Referring to FIGS. 13 , 14 , 15 and 16 , the touch panel 100B of the third embodiment is similar to the touch panel 100 of the first embodiment. The difference between the two is: in the third embodiment, as shown in FIG. 13 and FIG. 16, each of the first touch electrodes 122 has opposite first sides (eg: right side) and second sides (eg: left side), and is used as a dummy electrode 124 for touch signal lines are disposed on the first side (eg, the right side) of the corresponding first touch electrodes 122 . That is to say, in the third embodiment, there is only one dummy electrode 124 located between two adjacent first touch electrodes 122 , and the dummy electrode 124 has a larger width.

13 and FIG. 16, in the third embodiment, each of the first touch electrodes 122 has opposite first sides (eg: right side) and second sides (eg: left side), a plurality of The dummy electrodes 124 include a plurality of first dummy electrodes 124-1 and a plurality of second dummy electrodes 124-2, and the plurality of first dummy electrodes 124-1 are disposed on a plurality of first sides of the plurality of first touch electrodes 122, The plurality of second dummy electrodes 124-2 are disposed on the plurality of second sides of the plurality of first touch electrodes 122; the touch area 110a includes a first sub-touch area 110a-1 and a first sub-touch area 110a-1 Outside the second sub-touch area 110a-2, each second touch electrode 142 has a first portion 142a and a second portion located in the first sub-touch area 110a-1 and the second sub-touch area 110a-2, respectively portion 142b; the first portion 142a and the second portion 142b of a second touch electrode 142 are electrically connected to the first dummy electrode 124-1 and the second dummy electrode 124-2, respectively, and are connected to the same second touch electrode 142 Other first touch electrodes 122 are disposed between the electrically connected first dummy electrodes 124-1 and the second dummy electrodes 124-2.

In other words, in the third embodiment, the dummy electrodes 124 used as touch signal lines are located on one side of the corresponding first touch electrodes 122 , and the plurality of dummy electrodes 124 are disposed in the touch area 110 a The first sub-touch area 110a-1 and the second sub-touch area 110a-2 on both sides.

FIG. 17 is a schematic top view of the touch panel 100C according to the fourth embodiment of the present invention.

FIG. 18 shows the first conductive layer 120C on the touch area 110a of FIG. 17 .

FIG. 19 shows the second conductive layer 140 on the touch area 110a of FIG. 17 .

FIG. 20 shows the second touch electrodes 142 of the second conductive layer 140 , the dummy electrodes 124 of the first conductive layer 120C and the contact windows 132 of the insulating layer 130 on the touch area 110 a of FIG. 17 .

It should be noted that, for the sake of clarity, FIG. 17 to FIG. 20 represent the grid-shaped first touch electrodes 122 , the grid-shaped dummy electrodes 124 , and the grid-shaped second touch electrodes 142 with simple frames. and grid-shaped dummy electrodes 144 .

Referring to FIGS. 17 , 18 , 19 and 20 , the touch panel 100C of the fourth embodiment is similar to the touch panel 100B of the third embodiment, and the difference is that in the fourth embodiment, as shown in FIG. 17 and FIG. 20, one second touch electrode 142 is electrically connected to only one dummy electrode (eg, the first dummy electrode 124-1), and is used as a plurality of dummy electrodes ( For example, the plurality of first dummy electrodes 124-1) are the first sub-touch areas 110a-1 disposed on one side of the touch area 110a.

FIG. 21 is a schematic top view of the touch panel 100D according to the fifth embodiment of the present invention.

FIG. 22 shows the first conductive layer 120D on the touch area 110a of FIG. 21 .

FIG. 23 shows the second conductive layer 140D on the touch area 110a of FIG. 21 .

FIG. 24 shows the second touch electrodes 142 of the second conductive layer 140D, the dummy electrodes 124 of the first conductive layer 120D, and the contact windows 132 of the insulating layer 130 on the touch area 110a of FIG. 21 .

It should be noted that, for the sake of clarity, FIGS. 21 to 24 represent the grid-shaped first touch electrodes 122 , the grid-shaped dummy electrodes 124 , and the grid-shaped second touch electrodes 142 with simple frames. and grid-shaped dummy electrodes 144 .

Please refer to FIG. 21 , FIG. 22 , FIG. 23 and FIG. 24 , the touch panel 100D of the fifth embodiment is similar to the touch panel 100 of the first embodiment. 23 and FIG. 24, the second touch electrode 142 includes a first portion 142a and a second portion 142b located in the first sub-touch area 110a-1 and the second sub-touch area 110a-2, respectively, and the first portion 142a The second portion 142b is structurally separated and electrically connected to different dummy electrodes 124 respectively. Therefore, the coupling capacitance between the first conductive layer 120D and the second conductive layer 140D of the touch panel 100D can be reduced, which facilitates the driving of the touch panel 100D.

Claims (8)

1. A touch panel, comprising: a substrate having a touch area and a peripheral area, wherein the peripheral area is located on one side of the touch area; A first conductive layer disposed on the substrate, wherein the first conductive layer has a plurality of first touch electrodes and a plurality of dummy electrodes, the first touch electrodes and the dummy electrodes are located in the touch area and Structurally separated from each other, the first touch electrodes and the dummy electrodes are arranged in a first direction, and each of the dummy electrodes is disposed between two adjacent ones of the first touch electrodes; A second conductive layer disposed on the substrate, wherein the second conductive layer has a plurality of second touch electrodes, the second touch electrodes are located in the touch area and are separated from each other in structure, the second touch electrodes The touch electrodes are arranged in a second direction, and the first direction and the second direction are staggered; An insulating layer is disposed between the first conductive layer and the second conductive layer, so that the first touch electrodes are electrically independent from the second touch electrodes, wherein the insulating layer has a plurality of contact windows ; a plurality of first bonding pads disposed on the peripheral region of the substrate, wherein the first touch electrodes are electrically connected to the first bonding pads; and A plurality of second bonding pads are disposed on the peripheral region of the substrate, wherein the second touch electrodes of the second conductive layer are electrically connected to the first conductive layer through the contact windows of the insulating layer The dummy electrodes are electrically connected to the second bonding pads. 2 . The touch panel of claim 1 , wherein the dummy electrode has a first part and a second part, the first part and the second part are arranged in the second direction, the first part At least one of the contact windows overlapping the insulating layer is electrically connected to one of the second bonding pads, the second portion spans at least one of the second touch electrodes, and the first portion is disconnected from the second portion. 3 . The touch panel of claim 1 , wherein the first conductive layer and the second conductive layer have a plurality of repeating structures arranged in an array in the touch area, and the first conductive layer of the repeating structure has a plurality of repeating structures. 4 . A part of the second conductive layer of the repeating structure has a coupling capacitance Cm, and Cm≤1.5pF. 4 . The touch panel of claim 1 , wherein each of the first touch electrodes has a first side and a second side opposite to each other, and the dummy electrodes comprise a plurality of first dummy electrodes and a plurality of first Two dummy electrodes, the first dummy electrodes are structurally separated from the second dummy electrodes, the first dummy electrodes are disposed on the first sides of the first touch electrodes, the second dummy electrodes disposed on a plurality of second sides of the first touch electrodes, and one of the second touch electrodes is electrically connected to a first side and the second side of the same first touch electrode a dummy electrode and the second dummy electrode. 5 . The touch panel of claim 4 , wherein a plurality of dummy electrode groups comprise the first dummy electrodes and the second dummy electrodes, and each of the dummy electrode groups comprises the same first touch electrodes respectively. 6 . a first dummy electrode and a second dummy electrode on the first side and the second side; the touch area includes a first sub-touch area and a second sub-touch area outside the first sub-touch area sub-touch areas, each of the second touch electrodes has a first part and a second part respectively located in the first sub-touch area and the second sub-touch area; the second touch electrodes The first part and the second part are respectively electrically connected to different dummy electrode groups. 6 . The touch panel of claim 1 , wherein each of the first touch electrodes has a first side and a second side opposite to each other, and the dummy electrodes are disposed between the first touch electrodes. 7 . Multiple first sides. 7 . The touch panel of claim 1 , wherein each of the first touch electrodes has a first side and a second side opposite to each other, and the dummy electrodes comprise a plurality of first dummy electrodes and a plurality of first Two dummy electrodes, the first dummy electrodes are disposed on a plurality of first sides of the first touch electrodes, and the second dummy electrodes are disposed on a plurality of second sides of the first touch electrodes; the touch The control area includes a first sub-touch area and a second sub-touch area outside the first sub-touch area, each of the second touch electrodes is located in the first sub-touch area and the second sub-touch area respectively a first part and a second part of a sub-touch area; the first part and the second part of a second touch electrode are respectively electrically connected to a first dummy electrode and a second dummy electrode , and at least one first touch electrode of the first touch electrodes is disposed between the first dummy electrode and the second dummy electrode. 8. The touch panel of claim 1, wherein the touch area comprises a first sub-touch area and a second sub-touch area outside the first sub-touch area, each of the second touch sub-areas The control electrode includes a first part and a second part respectively located in the first sub-touch area and the second sub-touch area; the first part and the second part of the second touch electrode are in the structure are separated on top and are respectively electrically connected to the different dummy electrodes.

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