CN206470732U - Double layer mutual capacitive touch panel - Google Patents

Abstract

The utility model provides a double-deck formula touch panel that holds each other, including first conducting layer and second conducting layer. The first conductive layer comprises a plurality of electrodes which are arranged into an array, wherein in each row of the array, the electrodes positioned in the (N x M) -1 rows are electrically connected with each other to form a first electrode serial, the electrodes positioned in the N x M rows are electrically connected with each other to form a second electrode serial, N is a positive integer larger than or equal to 2, and M is a positive integer larger than or equal to 1. The second conductive layer includes M electrode strip groups insulated from each other, and the M electrode strip groups are sequentially arranged along the row direction of the array, wherein each electrode strip group includes N electrode strips electrically connected to each other, and each electrode strip of each electrode strip group extends along the column direction of the array and is respectively overlapped with the electrodes of a corresponding column.

Description

Double layer mutual capacitive touch panel

technical field

The utility model relates to a mutual capacitance touch panel, in particular to a double-layer mutual capacitance touch panel with a double-layer electrode structure.

Background technique

With the rapid development of science and technology, touch display devices composed of displays and touch panels can realize touch and display functions at the same time, and have the characteristics of human-computer interaction, and have been widely used in smart phones (smart phones), satellites, etc. Navigation system (GPS navigator system), tablet computer (tablet PC) and notebook computer (laptopPC) and other electronic products. Among them, the mutual capacitive touch panel has become the mainstream touch technology used in the industry due to its advantages of high accuracy, multi-touch, high durability, and high touch resolution.

The mutual capacitive touch technology mainly detects the touch event by detecting the change of coupling capacitance between the static electricity on the touch object and the touch unit when the touch object is adjacent to or in contact with the touch unit on the touch panel. The mutual capacitive touch technology can be mainly divided into two types in terms of structural design: a single-layer electrode structure and a double-layer electrode structure. Please refer to FIG. 1 , which shows a schematic top view of a traditional mutual capacitive touch panel with a single-layer electrode structure. As shown in FIG. 1 , the driving electrodes 12 and the sensing electrodes 14 of the touch panel 10 with the traditional single-layer electrode structure are formed by the same electrode layer, so the thickness of the touch panel 10 as a whole can be reduced. Moreover, each sensing electrode 14 is strip-shaped, and is arranged corresponding to a plurality of driving electrodes 12 to generate a coupling capacitance with each driving electrode 12 to serve as a touch control unit respectively. However, in order to electrically connect each driving electrode 12 to the surrounding pads, wires 16 need to be arranged between adjacent sensing electrodes 14 to be electrically connected to each driving electrode 12 respectively, so that the distance between adjacent sensing electrodes 14 is Due to the influence of the configuration of the wires 16 , it cannot be reduced, thereby limiting the pitch of the touch units and the distribution density of the touch units (that is, the resolution of the touch panel). Moreover, when the touch panel 10 with a single-layer electrode structure is disposed on a display, since the sensing electrodes 14 are completely exposed on the display, the sensing electrodes 14 are likely to receive noise from the display, resulting in poor touch positioning sensitivity.

Please refer to FIG. 2 , which shows a schematic top view of a conventional mutual capacitive touch panel with a double-layer electrode structure. As shown in FIG. 2 , each sensing electrode 22 and each driving electrode 24 of the touch panel 20 are strip-shaped and interlaced with each other to form a touch unit, and the driving electrodes 24 are arranged between the sensing electrodes 22 and the display. , to block noise from the display. In addition, due to the design of the double-layer electrode structure, since the sensing electrodes 22 and the driving electrodes 24 intersect with each other, there is no need to arrange wires between the sensing electrodes 22 or between the driving electrodes 24, thereby increasing the distribution density of the touch control units. And simplify the pattern design to reduce the difficulty of production. Moreover, in terms of the algorithm used by the touch chip to control the touch panel 20 , the design of the double-layer electrode structure is also easier than the design of the single-layer electrode structure. Therefore, the design of the double-layer electrode structure is widely used in middle and high-end consumer electronic products. However, in the design of the conventional double-layer electrode structure, the wires 26 for electrically connecting the sensing electrodes 22 to the pads are arranged in the peripheral regions 20b on both sides of the touch region 20a, so that the peripheral region 20b The range will be limited by the number of wires 26 and cannot be reduced.

Utility model content

One of the objectives of the present invention is to provide a double-layer mutual capacitive touch panel with fewer wires, which reduces the number of wires, thereby reducing the width of the peripheral areas on both sides of the touch area.

An embodiment of the present invention provides a double-layer mutual-capacitance touch panel, which has a touch area and a peripheral area, and includes a first conductive layer, a second conductive layer, and an insulating layer. The first conductive layer includes a plurality of electrodes arranged in an array and located in the touch area, wherein in each row of the array, the electrodes located in (N*M)-1 columns are electrically connected to each other to form a first electrode series, And the electrodes located in N*M columns are electrically connected to each other to form a second electrode series, N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1. The second conductive layer is disposed on the first conductive layer, and the second conductive layer includes M electrode strip groups insulated from each other, which are sequentially arranged in the touch area along the row direction of the array, wherein each electrode strip group includes N The electrode strips are electrically connected to each other, and each electrode strip of each electrode strip group extends along the column direction of the array and overlaps with electrodes corresponding to a column respectively. The insulation layer is disposed between the first conductive layer and the second conductive layer.

In the double-layer mutual capacitive touch panel of the present invention, the same electrode strip group and at least the first electrode series and the second electrode series in the same row are capacitively coupled to form at least two different touch panels. unit, and the electrode strips of each electrode strip group are electrically connected to each other, so that a single electrode strip group can be regarded as a single sensing electrode, so at least two touch units only need a second wire to transmit the sensing signal to the second pad, thereby The number of second wires required by the double-layer mutual-capacitive touch panel can be reduced by at least half compared with the conventional double-layer mutual-capacitive touch panel, thereby reducing the width of the peripheral area for arranging the second wires.

Description of drawings

FIG. 1 illustrates a schematic top view of a conventional mutual-capacitive touch panel with a single-layer electrode structure.

FIG. 2 is a schematic top view of a conventional mutual capacitive touch panel with a double-layer electrode structure.

FIG. 3 is a schematic cross-sectional view of a touch display device according to an embodiment of the present invention.

FIG. 4 is a schematic top view of the double-layer mutual-capacitance touch panel according to the first embodiment of the present invention.

FIG. 5 is a schematic top view of a double-layer mutual-capacitance touch panel according to a variant embodiment of the first embodiment of the present invention.

FIG. 6 is a schematic top view of the first conductive layer of the second embodiment of the present invention.

FIG. 7 is a schematic top view of the second conductive layer of the second embodiment of the present invention.

FIG. 8 is a schematic top view of a double-layer mutual-capacitance touch panel according to the second embodiment of the present invention.

FIG. 9 is a schematic top view of a double-layer mutual-capacitance touch panel according to a third embodiment of the present invention.

Symbol Description

10, 20 Touch panel 12, 24 Drive electrodes

14, 22 Sensing electrodes 16, 26 Wires

20a, 102a touch area 20b, 102b peripheral area

100 touch display devices

102, 102’, 102” double-layer mutual capacitive touch panel

104 Display panel 106 Substrate

108 film 110, 110a, 110' first electrode series

112, 112a, 112' second electrode series 114, 114' first connecting line segment

116, 116' second connecting line segment 118, 118a electrode strip group

119, 119a, 119’, 119” electrode strips

120 first wire

122 Second wire 122a branch

122L Left Wire 122R Right Wire

124 First Pad 126 Second Pad

128 Third electrode series 130 Third connecting line segment

C1, C1a, C1’ first conductive layer

C2, C2a, C2’, C2” second conductive layer

CD row direction RD column direction

E1, E1’, E2, E2’, E3 electrodes

TU1, TU2, TU3, TU’ touch unit

S Displacement CP Cross

FE1 First floating electrode FE2 Second floating electrode

CA Notch Z Vertical Projection Direction

OP opening FE3 third floating electrode

FE4 Fourth floating electrode

detailed description

Please refer to FIG. 3 , which shows a schematic cross-sectional view of a touch display device according to an embodiment of the present invention. As shown in FIG. 3 , the touch display device 100 of this embodiment includes a double-layer mutual-capacitance touch panel 102 and a display panel 104 , wherein the double-layer mutual-capacitance touch panel 102 can be arranged on the display surface of the display panel 104 . The double-layer mutual capacitive touch panel 102 has a touch area 102a and a peripheral area 102b, wherein the touch area 102a is used for setting driving electrodes and sensing electrodes, and the peripheral area 102b is used for setting connection lines. In this embodiment, the peripheral area 102b may surround the touch area 102a, but it is not limited thereto. Moreover, the double-layer mutual capacitive touch panel 102 may include a first conductive layer C1 and a second conductive layer C2, which are sequentially disposed on the display surface, and the first conductive layer C1 and the second conductive layer C2 may be transparently disposed on the display surface. The insulating layers therebetween are electrically insulated from each other. In this embodiment, the double-layer mutual capacitive touch panel 102 may further include a substrate 106 and two thin films 108 . The first conductive layer C1 and the second conductive layer C2 can be respectively formed on the film 108, and the substrate 106 is bonded to the film 108 provided with the second conductive layer C2 through two adhesive layers, and the film 108 provided with the first conductive layer C1 The thin film 108 is bonded to the thin film 108 provided with the second conductive layer C2 to form a double-layer mutual capacitive touch panel 102 . Then, the double-layer mutual capacitive touch panel 102 can be pasted on the display surface through the adhesive layer, so that the first conductive layer C1 and the second conductive layer C2 are disposed between the substrate 106 and the display panel 104 . The thin film 108 disposed between the first conductive layer C1 and the second conductive layer C2 can be used as an insulating layer to electrically insulate the two. Preferably, the first conductive layer C1 closer to the display panel may include driving electrodes for transmitting driving signals, and the second conductive layer C2 closer to the touch object may include sensing electrodes for generating sensing signals, thereby driving The electrodes can not only be used to transmit driving signals, but also can shield the influence of the display panel on the sensing electrodes. The double layer mutual capacitive touch panel 102 of the present invention is not limited to the above. In another embodiment, the second conductive layer C2 and the first conductive layer C1 can also be directly formed on the substrate 106 in sequence, and an insulating layer is formed between the first conductive layer C1 and the second conductive layer C2, so as to Both are electrically insulated. In yet another embodiment, the first conductive layer C1 and the second conductive layer C2 can also be directly formed on the display surface of the display panel 104, such as a color filter substrate of a liquid crystal display panel or a packaging cover of an organic light emitting display panel. . In addition, the substrate 106 may include a rigid substrate or a flexible substrate, such as a glass substrate, a strengthened glass substrate, a quartz substrate, a sapphire substrate, a hard cover lens (cover lens), a plastic substrate, a flexible cover lens, a flexible plastic substrate, or Thin glass substrate.

The first conductive layer C1 includes a plurality of electrodes arranged in an array and located in the touch area 102a. Each row of the array includes at least a first electrode series in which electrodes in (N*M)-1 columns are electrically connected to each other, and a second electrode series in which electrodes in N*M columns are electrically connected to each other row, N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1. Please refer to FIG. 4 , which shows a schematic top view of the double-layer mutual-capacitance touch panel according to the first embodiment of the present invention. For convenience of illustration, the film 108 is omitted in FIG. 4 , but the present invention is not limited thereto. As shown in FIG. 4, N in this embodiment is equal to 2, so in each row of the array, the electrodes E1 located in odd columns (ie, 2*M−1 columns) are electrically connected to each other to form a first electrode series 110, and The electrodes E2 located in even columns (ie, 2*M columns) are electrically connected to each other to form a second electrode series 112 . The first electrode series 110 and the second electrode series 112 are insulated from each other, and any two adjacent electrodes E1 or E2 located in the same column but in different rows are separated and insulated from each other, so that the first electrode series 110 in different rows and in different rows The second electrode series 112 are insulated from each other. Specifically, the first conductive layer C1 may further include a plurality of first connecting line segments 114 and a plurality of second connecting line segments 116, each first connecting line segment 114 is connected to two adjacent electrodes E1 ( That is, two adjacent electrodes E1 located in the same row and different odd-numbered columns), each second connection line segment 116 connects two adjacent electrodes E2 in each second electrode series 112 (that is, two adjacent electrodes E2 located in the same row and different even-numbered columns) Two adjacent electrodes E2). In this embodiment, the first connecting line segment 114 and the second connecting line segment 116 corresponding to the same row of electrodes E1 and E2 are respectively arranged on both sides of the same row of electrodes E1 and E2, for example, they are respectively arranged on the left side and the right side or vice versa. In this way, the first connecting line segment 114 and the second connecting line segment 116 can be staggered to avoid electrical connection. Specifically, the electrodes E1 and E2 of each row overlap and align with each other in the row direction CD of the array. Moreover, the first connection line segment 114 does not overlap with the corresponding electrode E1 of the first electrode series 110 in the row direction CD of the array, and the second connection line segment 116 does not overlap with the corresponding second electrode series in the row direction CD of the array. Electrodes E2 of row 112 overlap.

In addition, the second conductive layer C2 includes a plurality of electrode strip groups 118 insulated from each other, arranged sequentially along the row direction CD of the array, and each electrode strip group 118 includes two electrode strips 119 electrically connected to each other. Each electrode strip 119 of each electrode strip group 118 extends along the column direction RD of the array and overlaps with the electrodes E1 or E2 corresponding to a column in a vertical projection direction Z, so that the electrode strips 119 corresponding to the same row of electrodes E1 can be Generate capacitive coupling with each electrode E1 to form a touch unit TU1, and the electrode strip 119 corresponding to the same row of electrodes E2 can generate capacitive coupling with each electrode E2 to form a touch unit TU2 for detecting the touch object Location. Since the two electrode strips 119 of the same electrode strip group 118 are adjacent to each other, they can overlap with the electrodes E1 and E2 of two adjacent columns respectively, that is, they can overlap with the first electrode series 110 and the second electrode series 112 respectively. Coupling, whereby the same electrode strip group 118 can form two different touch units TU1 and TU2 with the first electrode series 110 and the second electrode series 112 in the same row. In this embodiment, each electrode strip 119 can be in the shape of a long strip, but it is not limited thereto, and can also be in other shapes. In addition, the width of each electrode E1 and E2 in the row direction CD of the array can be greater than the width of each electrode strip 119 in the row direction CD of the array, so the electrodes E1 and E2 can effectively shield and block the influence of the display on the electrode strip 119 , so as to improve the touch accuracy of the double-layer mutual capacitive touch panel 102 .

In this embodiment, the double-layer mutual capacitive touch panel 102 may further include a plurality of first wires 120 and a plurality of second wires 122 disposed on the substrate 106 in the peripheral region 102b. Each first wire 120 is electrically connected to each first electrode series 110 and each second electrode series 112 , and each second wire 122 is electrically connected to each electrode strip 119 of each electrode strip group 118 . Specifically, the first wire 120 and the second wire 122 may include silver or a transparent conductive material, for example. The first wire 120 can extend from the peripheral area 102b to the touch area 102a to connect with the corresponding first connecting line segment 114 or the second connecting line segment 116 . Each of the first wires 120 and the electrodes E1 and E2 may be formed by the same first conductive layer C1 or by different conductive layers. Each second wire 122 may include two branch portions 122a, respectively connected to the electrode strips 119 of the same electrode strip group 118, and each second wire 122 may be formed of the same second conductive layer C2 as the electrode strip 119 or by a different conductive layer. formed. In addition, the double-layer mutual capacitive touch panel 102 may further include a plurality of first pads 124 and a plurality of second pads 126 disposed on the substrate 106 in the peripheral region 102b on the same side as the touch region 102a. Specifically, the first pads 124 and the second pads 126 can be respectively disposed on different films 108 , but it is not limited thereto. Each first pad 124 is electrically connected to each first wire 120, and each second pad 126 is electrically connected to each second wire 122, so that the electrode strip set 118 can be electrically connected to the first pad 124. The external control chip, the first electrode series 110 and the second electrode series 112 can be electrically connected to the external control chip through the second pad 126 . Furthermore, the second wire 122 can be distinguished from the left wire 122L and the right wire 122R, which are respectively disposed on two sides of the touch area 102a, and extend to the other side of the touch area 102a to communicate with the second pad 126 connect. It is worth noting that each second wire 122 in this embodiment can not only connect the same electrode strip group 118 to the second pad 126, but also electrically connect the electrode strips 119 of the same electrode strip group 118, so that the same electrode strip group 118 can be electrically connected to each other. The electrode strips 119 of the group 118 can be electrically connected at the peripheral region 102b. The utility model is not limited to this electrical connection method. In another embodiment, the electrode strips 119 of each electrode strip group 118 can also be electrically connected in the touch area 102a. For example, the double-layer mutual capacitive touch panel 102 may further include a plurality of connecting line segments disposed in the touch area 102a, and each connecting line segment is respectively disposed between the electrode strips 119 of each electrode strip group 118 and connects two By. The connection line segment and the electrode strip 119 may be formed by the same second conductive layer C2 or by a different conductive layer.

Further, the first electrode series 110 and the second electrode series 112 can be used as different driving electrodes for respectively transmitting a driving signal. The electrode strips 119 of each electrode strip group 118 are electrically connected to each other, so a single electrode strip group 118 can be regarded as a single sensing electrode for generating a corresponding sensing signal due to capacitive coupling when the corresponding electrode E1 or E2 receives a driving signal. Taking a single electrode strip group 118 as an example, when performing touch detection, the control chip will send driving signals to the first electrode series 110 and the second electrode series 112 respectively, and the electrode strip groups 118 can respectively correspond to the first electrode series The driving signals of the row 110 and the second electrode series 112 generate corresponding sensing signals, so that a single electrode strip group 118 can generate two sensing signals respectively according to two different driving signals or two identical driving signals at different times, so as to achieve two-touch Detection of control units TU1 and TU2. Those skilled in the art can understand that this operational characteristic can be applied to all the embodiments of the present invention, and will not be described in detail below. It can be seen from the operation mode that two different touch units TU1 and TU2 are formed through the capacitive coupling configuration of the same electrode strip group 118 and the first electrode series 110 and the second electrode series 112 in the same row. The two touch units TU1 and TU2 only need one second wire 122 to transmit the sensing signal to the second pad 126, so that the number of second wires 122 required by the double-layer mutual-capacitive touch panel 102 of this embodiment can be compared with The conventional double-layer mutual-capacitive touch panel shown in FIG. 2 is reduced by half, thereby reducing the width of the peripheral area 102b for disposing the second wire 122 . Taking the double-layer mutual capacitive touch panel 102 with 28×17 touch units as an example, each row has 28 touch units TU1 and TU2, and each column has 17 touch units TU1 and TU2. In this embodiment, The double-layer mutual capacitive touch panel 102 needs 17 first electrode series 110 and 17 second electrode series 112 , but only needs 14 electrode strip groups 118 . That is to say, only 14 second wires 122 are needed to connect the electrode strip groups 118 . Furthermore, the second conductive wires 122 can be respectively disposed in the peripheral regions 102b on both sides of the touch area 102a, so only seven second conductive wires 122 need to be disposed in the peripheral region 102b on one side. When the width of the second conducting wire 122 is 0.1 mm and the distance between adjacent second conducting wires 122 is 0.05 mm, the width of the one-side peripheral region 102b is only 1.05 mm. On the contrary, as shown in FIG. 1, a single sensing electrode and a single driving electrode of a conventional double-layer mutual-capacitance touch panel are only coupled to form a touch unit, so it requires 28 wires for connecting the sensing electrodes, so that The width of the peripheral area on one side needs to be 0.1×14+0.05×14=2.1 mm. It can be seen that the double-layer mutual capacitive touch panel 102 of this embodiment can effectively reduce the width of the peripheral area 102b located on the left and right sides of the touch area 102a. When the column direction RD of the touch panel 102 is the same as the horizontal direction of the image displayed on the display panel, the frame of the applied touch display device 100 can be further reduced without being limited by the number of the second wires 122 . In particular, when the touch display device 100 of this embodiment is applied to a smart phone, the borders on the left and right sides of the device can be reduced to achieve a nearly borderless appearance, so that the size of the smart phone can be reduced without changing the size of the smart phone. Increase the size of the display screen down.

The double-layer mutual capacitive touch panel of the present invention is not limited to the above-mentioned embodiments. In the first conductive layer, each row of the array is not limited to include a first electrode series of odd-numbered column electrodes and a second electrode series of even-numbered column electrodes. More precisely, each row of the array of the present invention at least includes a first electrode series in which the electrodes in (N*M)-1 columns are electrically connected to each other, and the electrodes in N*M columns are electrically connected to each other. N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1. For the first embodiment, N is equal to 2, but the present invention is not limited thereto. In order to facilitate the comparison of the differences between the first embodiment and other variant embodiments and other embodiments and to simplify the description, the same symbols are used to mark the same components in other variant embodiments and other embodiments below, and mainly for The differences between the first embodiment and the variant embodiments and the differences between the first embodiment and other embodiments will be described, and the repeated parts will not be repeated.

In another variant embodiment, as shown in FIG. 5 , when N is equal to 3, each row of the array includes not only the first electrode series 110 and the second electrode series 112 , but also the third electrode series 128 . For clarity, Fig. 5 only shows a single row, but not limited thereto. Compared with the first embodiment, in the first conductive layer C1a of this variant embodiment, the electrodes E1 located in 3*M-1 columns are electrically connected to each other to form a first electrode series 110a, and the electrodes located in 3*M columns E2 are electrically connected to each other to form a second electrode series 112a, and electrodes E3 located in 3*M-2 columns are electrically connected to each other to form a third electrode series 128, wherein the first electrode series 110a, the second electrode series 112a and the third electrode series 128 are insulated from each other. Each first wire 120 is electrically connected to each first electrode series 110 a , each second electrode series 112 a and each third electrode series 128 . Moreover, the first conductive layer C1a may further include a plurality of third connection line segments 130 respectively connected between two adjacent electrodes E3 in the same row. In order to electrically connect two adjacent electrodes E3 in the same row, a part of each third connecting line segment 130 is disposed between two adjacent electrodes E1 and E2 . Correspondingly, the second conductive layer C2a includes M electrode strip groups 118a that are insulated from each other, and are sequentially arranged in the touch area 102a along the row direction of the array, wherein each electrode strip group 118a includes N electrode strip groups 118a that are electrically connected to each other. The electrode strips 119a, and each electrode strip 119a of each electrode strip group 118a extends along the column direction of the array and overlaps with the electrodes E1, E2 or E3 corresponding to a column in the vertical projection direction Z. Each second wire 122 is electrically connected to the electrode strips 119a of each electrode strip group 118a respectively. The electrode strips 119a corresponding to the same column of electrodes E1 can generate capacitive coupling with each electrode E1 to form a touch control unit TU1, and the electrode strips 119a corresponding to the same column of electrodes E2 can generate capacitive coupling with each electrode E2 to form a touch control unit TU2, And the electrode strips 119a corresponding to the same row of electrodes E3 can generate capacitive coupling with each electrode E3 to form a touch unit TU3. Since the three touch units TU1, TU2 and TU3 in this variation embodiment only need one second wire 122 to transmit the sensing signal, the number of second wires 122 required by the double-layer mutual capacitance touch panel in this variation embodiment is not only Compared with the conventional double-layer mutual capacitive touch panel shown in FIG. 2, the number of the second wires 122 in the first embodiment can also be reduced, and the width of the peripheral area for setting the second wires 122 can be effectively reduced. . By analogy, N in the present invention can also be a positive integer greater than 4, so as to reduce the width of the peripheral area.

The double-layer mutual capacitive touch panel of the present invention further includes other embodiments. Please refer to Figure 6 to Figure 8. Fig. 6 depicts a schematic top view of the first conductive layer of the second embodiment of the present utility model, Fig. 7 depicts a schematic top view of the second conductive layer of the second embodiment of the present utility model, and Fig. 8 depicts a schematic view of the second conductive layer of the utility model The schematic top view of the double-layer mutual-capacitance touch panel of the second embodiment of the utility model. In order to clearly show the patterns of the first conductive layer and the second conductive layer, FIG. 6 only shows a 4×2 array, and FIG. 7 Then the pattern of the second conductive layer corresponding to the 4×2 array is shown, but the present invention is not limited thereto. As shown in FIG. 6 , compared with the first embodiment, the first connecting line segment 114 ′ of the first conductive layer C1 ′ of this embodiment is connected to the electrode of the corresponding first electrode series 110 ′ in the row direction CD of the array. E1 ′ overlaps, and the second connecting line segment 116 ′ overlaps the corresponding electrode E2 ′ of the second electrode series 112 ′ in the row direction CD of the array. In this embodiment, the electrodes E1' in the odd-numbered columns and the electrodes E2' in the even-numbered columns in the same row have a displacement S in the row direction CD of the array, which is equal to the width of the first connecting line segment 114' and the width of the even-numbered columns The sum of the distances between the electrode E2' and the corresponding first connecting line segment 114'. For example, compared with the electrodes E1' in the odd columns, the electrodes E2' in the even columns can be shifted to the right, and the first connecting line segments 114' are respectively arranged on the left side of the electrodes E2' in the even columns, each The second connecting line segments 116' are respectively disposed on the right side of the electrodes E1' in odd columns, but not limited thereto. In another embodiment, the electrodes E2' in the even-numbered columns can also be displaced to the left, and each first connecting line segment 114' can be respectively arranged on the right side of each electrode E2' in the even-numbered column, and each second connecting line segment 116' can be respectively arranged It is arranged on the left side of each electrode E1' in odd columns.

As shown in FIG. 7 , compared with the first embodiment, each electrode strip 119' of this embodiment includes a plurality of cross-shaped portions CP connected in series along the column direction RD of the array to form a grid-shaped electrode strip. In order to correspond to the arrangement of the electrodes E1' and E2' in the first conductive layer C1', any two adjacent electrode strips 119' also have a displacement S in the row direction CD of the array. In addition, the second conductive layer C2' may further include a plurality of first floating electrodes FE1 and a plurality of second floating electrodes FE2. The first floating electrode FE1 is respectively arranged between any two adjacent cross-shaped parts CP connected to each other, and the second floating electrode FE2 is arranged between any two adjacent electrode strips 119 ′ to lift the touch object. The coupling capacitance with the electrode strip 119' increases the amount of induction signal generated by the electrode strip 119'. Specifically, the grid electrode strip 119' has a plurality of notches CA, and each first floating electrode FE1 is respectively disposed in each notch CA. The second floating electrodes FE2 are located outside the notch CA, and each of them is respectively located between two adjacent first floating electrodes FE1 between two adjacent electrode strips 119'.

As shown in FIG. 8 , in this embodiment, the two cross-shaped portions CP of each electrode strip 119' may overlap with a corresponding electrode E1' or E2' in the vertical projection direction Z, but it is not limited thereto. Since the displacement S of any two adjacent electrode strips 119' in the row direction CD of the array is the same as the displacement S of the electrodes E1' and E2' in the odd and even columns in the same row in the row direction CD of the array, the electrodes Strip 119' overlaps the same area as each electrode El' or E2'. It can be seen that each touch unit TU' has the same sensitivity, which can improve the accuracy of the double-layer mutual capacitive touch panel 102' in detecting the linear movement of the touch object. In addition, the width of each electrode E1' and E2' in the row direction CD of the array can also be greater than the width of each cross-shaped portion CP in the row direction CD of the array, so as to shield and block the influence of the display on the electrode strips 119'. It is worth noting that the double-layer mutual-capacitance touch panel 102' of this embodiment generates capacitive coupling with the corresponding electrode E1' or E2' through the cross-shaped part CP, so when the touch object does not touch the case When the touch is performed downward, that is, the so-called floating touch, the double-layer mutual capacitive touch panel 102 ′ can still have good touch accuracy.

In another embodiment, the odd-numbered column electrodes E1' and the even-numbered column electrodes E2' in the same row may not have displacement in the row direction CD of the array. In other words, the electrodes E1' and E2' of each row are aligned with each other in the row direction CD of the array. Moreover, the first connecting line segment 114' in this embodiment does not overlap with the corresponding electrode E1' of the first electrode series 110' in the row direction CD of the array, and the second connecting line segment 116' is in the row direction CD of the array does not overlap with the corresponding electrode E2' of the second electrode series 112'.

Please refer to FIG. 9 , which shows a schematic top view of a double-layer mutual-capacitance touch panel according to a third embodiment of the present invention. As shown in FIG. 9 , compared with the first embodiment, each electrode strip 119 ″ of the double-layer mutual capacitive touch panel 102 ″ of this embodiment may include a plurality of openings OP, sequentially along the column direction of the array. RD arrangement. Specifically, each opening OP of each electrode strip 119" overlaps with a corresponding electrode E1 or E2, thereby increasing the number of touch objects approaching or touching the double-layer mutual-capacitive touch panel 102" through the opening OP. The amount of change in sensing capacitance, thereby increasing the touch accuracy of the double-layer mutual capacitive touch panel 102". In addition, the second conductive layer C2" of this embodiment may additionally include a plurality of third floating electrodes FE3, which are respectively set In the opening OP, and the third floating electrode FE3 and the electrode bar 119" are separated from each other. For example, three third floating electrodes FE3 separated from each other can be arranged in each opening OP, but not limited to In addition, the second conductive layer C2" may further include a plurality of fourth floating electrodes FE4, which are arranged between any two adjacent electrode strips 119", so as to improve the capacitance sensing of the touch object. In another implementation In the example, the electrodes E1" in the odd columns and the electrodes E2" in the even columns in the same row have a displacement S in the row direction CD of the array, and any two adjacent electrode strips 119" are in the row direction CD of the array There is also a displacement S, so that the openings OP of two adjacent electrode strips 119" also have a displacement S.

Same as the first embodiment, in the first conductive layer of the double-layer mutual-capacitive touch panel of the second embodiment and the third embodiment, each row of the array is not limited to include the first electrode series of the odd-numbered column electrodes and a second electrode series comprising electrodes located in even columns. Each row of the array includes at least a first electrode series in which electrodes in (N*M)-1 columns are electrically connected to each other, and a second electrode series in which electrodes in N*M columns are electrically connected to each other row, N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1. Moreover, the second conductive layer correspondingly includes M electrode strip groups insulated from each other, and each electrode strip group includes N electrode strips electrically connected to each other. The rest of the same parts will not be repeated.

To sum up, in the double-layer mutual capacitive touch panel of the present invention, the same electrode strip group and at least the first electrode series and the second electrode series in the same row are capacitively coupled to form at least two different touch units, and the electrode strips of each electrode strip group are electrically connected to each other, so that a single electrode strip group can be regarded as a single sensing electrode, so at least two touch units only need a second wire to transmit the sensing signal to the second contact pads, whereby the number of second wires required by the double-layer mutual-capacitive touch panel can be reduced by at least half compared with the conventional double-layer mutual-capacitive touch panel, thereby reducing the width of the peripheral area used to arrange the second wires , and make the applied smartphone achieve a near-bezel-less appearance.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the claims of the present utility model shall fall within the scope of the present utility model.

Claims (14)

1. a kind of double-deck mutual-capacitive touch panel, it is characterised in that with a Touch Zone and a peripheral region, and the double-deck mutual tolerance Formula contact panel includes：

One first conductive layer, including multiple electrodes, are arranged in an array, and in the Touch Zone, wherein in the every of the array In a line, be electrically connected to each other into that a first electrode is serial positioned at the grade electrodes arranged of (N*M) -1, and arrange positioned at N*M this etc. Electrode is electrically connected to each other into a second electrode serially, and N is the positive integer more than or equal to 2, and M is the positive integer more than or equal to 1；

One second conductive layer, is arranged on first conductive layer, and second conductive layer includes M electrode strip groups insulated from each other, Along the line direction sequential of the array in the Touch Zone, wherein respectively the electrode strip group includes what N bars were electrically connected to each other Electrode strip, and respectively respectively electrode strip of the electrode strip group along the array column direction extension and respectively with corresponding one arrange this etc. Electrode is in overlapping on a upright projection direction；And

One insulating barrier, is arranged between first conductive layer and second conductive layer.

2. bilayer mutual-capacitive touch panel as claimed in claim 1, it is characterised in that separately including a plurality of wire, be arranged at this In peripheral region, and respectively the grade electrode strip of the respectively electrode strip group is electrically connected in the wire.

3. bilayer mutual-capacitive touch panel as claimed in claim 1, it is characterised in that first conductive layer separately includes a plurality of the One connecting line segment and a plurality of second connecting line segment, and respectively first connecting line segment to connect corresponding one first electrode respectively serial In two adjacent grade electrodes, respectively second connecting line segment connect respectively corresponding one second electrode it is serial in two it is adjacent should Deng electrode.

4. bilayer mutual-capacitive touch panel as claimed in claim 3, it is characterised in that respectively first connecting line segment is in the array Line direction on not the grade electrode serial with the corresponding first electrode it is overlapping, and respectively second connecting line segment in the row of array The grade electrode serial with the corresponding second electrode be not overlapping on direction.

5. bilayer mutual-capacitive touch panel as claimed in claim 3, it is characterised in that respectively first connecting line segment is in the array Line direction on serial with the corresponding first electrode grade electrode it is overlapping, and respectively second connecting line segment in the row side of array The grade electrode serial with the corresponding second electrode is overlapping upwards.

6. bilayer mutual-capacitive touch panel as claimed in claim 1, it is characterised in that (N*M) -1 in same a line is arranged Respectively electrode for arranging of the respectively electrode and N*M have a displacement, and the respectively grade electricity of the electrode strip group on the line direction of the array Pole bar has the displacement on the line direction of the array.

7. bilayer mutual-capacitive touch panel as claimed in claim 1, it is characterised in that respectively the electrode strip includes multiple along this The cross-shaped formation that the column direction of array is sequentially connected.

8. bilayer mutual-capacitive touch panel as claimed in claim 7, it is characterised in that each grade cross of two of the electrode strip The electrode is overlapping with corresponding one in shape portion.

9. bilayer mutual-capacitive touch panel as claimed in claim 7, it is characterised in that second conductive layer separately includes multiple the One floating electrode, is respectively arranged at that wantonly two is adjacent and between the grade cross-shaped formation that is connected to each other.

10. bilayer mutual-capacitive touch panel as claimed in claim 7, it is characterised in that second conductive layer separately includes multiple Second floating electrode, is arranged between wantonly two adjacent grade electrode strips.

11. bilayer mutual-capacitive touch panel as claimed in claim 1, it is characterised in that respectively the electrode strip includes multiple perforates, Sequentially arranged along the column direction of the array.

12. bilayer mutual-capacitive touch panel as claimed in claim 11, it is characterised in that respectively respectively perforate of the electrode strip point The electrode is not overlapping with corresponding one.

13. bilayer mutual-capacitive touch panel as claimed in claim 11, it is characterised in that second conductive layer separately includes multiple 3rd floating electrode, is respectively arranged in the grade perforate.

14. bilayer mutual-capacitive touch panel as claimed in claim 11, it is characterised in that second conductive layer separately includes multiple 4th floating electrode, is arranged between wantonly two adjacent grade electrode strips.