CN207833482U - Mutual capacitive touch panel with double layer electrode structure - Google Patents

Abstract

the utility model provides a mutual capacitance formula touch panel, including first conducting layer and second conducting layer, first conducting layer includes a plurality of electrodes and many connecting line sections of arranging into an array, in every line of array, the electrode that is located (N × M) -1 row sees through partial connecting line section electric connection each other and becomes a first electrode tandem, and the electrode that is located N × M row sees through partial second connecting line section electric connection each other and becomes a second electrode tandem.

Description

Mutual capacitive touch panel with double layer electrode structure

technical field

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

Background technique

With the rapid development of science and technology, the touch display device composed of a display and a touch panel can realize touch and display functions at the same time, and has the characteristics of human-computer interaction, and has been widely used in smart phones (smart phones), satellite navigation system (GPS navigator system), tablet PC (tablet PC) and notebook computer (laptop PC) and other electronic products. Among them, the mutual capacitive touch panel has become the mainstream touch technology currently 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 judges 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. Since the structure design and control algorithm of the double-layer electrode structure are simpler and easier than the single-layer electrode structure, the design of the double-layer electrode structure is generally used in mid-to-high-end consumer electronic products. In the design of the traditional double-layer electrode structure, the sensing series and the driving series extend along the horizontal and vertical directions perpendicular to each other, so the wires connecting the sensing series must be connected to the sensing series from both sides of the sensing series , so that the range of the peripheral areas on both horizontal sides of the touch panel is limited by the number of wires and cannot be reduced. For this reason, a current development method divides the driving series in the same row into two driving series, and electrically connects the two adjacent sensing series to reduce the number of wires connecting the sensing series, thereby effectively reducing the frame width. touch panel.

In order to divide the driving series in the same row into two driving series, it is necessary to electrically connect the driving electrodes in the same row and odd-numbered columns and the driving electrodes in the same row and even-numbered columns through connecting wires. In this way, when the touch object moves linearly along the Y-axis direction, the moving track measured from the sensing series may not be a straight line. As shown in Figure 1, when the touch object moves linearly along the Y-axis direction, its measurement trajectory fluctuates left and right in the X-axis direction, that is, the movement trajectory detected by the touch panel does not match the actual movement trajectory of the touch object , but there is a problem of inaccurate detection.

Utility model content

One of the objectives of the present invention is to provide a mutual capacitive touch panel with a double-layer electrode structure, which improves detection accuracy with a small number of wires.

In order to achieve the above purpose, the utility model proposes a mutual capacitive touch panel, which has a touch area and a peripheral area. The mutual capacitive touch panel includes a first conductive layer, a second conductive layer and an insulating layer. The first conductive layer includes a plurality of electrodes and a plurality of connection line segments. The electrodes are arranged in an array and located in the touch area, wherein in each row of the array, electrodes located in (N×M)-1 columns are electrically connected to each other to form a first electrode series, and electrodes located in N×M columns They 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 connecting line segments include a plurality of first connecting line segments and a plurality of second connecting line segments, and each first connecting line segment is respectively connected to two adjacent electrodes in one of the corresponding first electrode series, and each second connecting line segment is respectively connected to Corresponding to two adjacent electrodes in one of the second electrode series. 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, and each electrode strip group includes N electrode strips , each electrode strip extends along the column direction of the array and overlaps with electrodes corresponding to a column in a vertical projection direction, wherein each electrode strip includes a plurality of first strip-shaped parts and a plurality of shielding parts, and each first strip-shaped part and each shielding part are alternately connected in series along the column direction of the array, each first strip part is respectively arranged corresponding to one of the electrodes, and each shielding part overlaps with one of the corresponding connecting line segments in the vertical projection direction, and The width of each shielding portion in the row direction of the array is greater than the width of each first strip portion in the row direction of the array. The insulation layer is disposed between the first conductive layer and the second conductive layer.

In the mutual capacitive touch panel of the present invention, each electrode strip is provided with a shielding portion overlapping with the connecting line segment, and the width of the shielding portion can be greater than the width of the first strip portion, so the shielding portion can shield the connecting line segment. The generated electric lines can effectively improve the detection accuracy of the mutual capacitive touch panel.

Description of drawings

In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a moving track detected by a traditional touch panel when a touch object moves linearly along the Y-axis.

FIG. 2 is a schematic side view of the mutual capacitive touch panel of the present invention.

FIG. 3 is a schematic top view of the mutual capacitive touch panel according to the first embodiment of the present invention.

FIG. 4 is a schematic top view of the first conductive layer of the first embodiment of the present invention.

FIG. 5A is a schematic top view of the second conductive layer of the first embodiment of the present invention.

FIG. 5B is a schematic top view of the second conductive layer of a variant embodiment of the first embodiment of the present invention.

FIG. 6 is a schematic diagram of the electric force lines of the connecting line segments to the corresponding electrode strips when there is no shielding portion. FIG. 7 is a schematic diagram of the electric force lines corresponding to the electrode strips when dummy electrodes are arranged on the connection line segment. FIG. 8 is a schematic diagram of a power line in which the connecting line segment of the present invention is shielded by the corresponding shielding part.

9 is a top view of a mutual-capacitive touch panel without a shielding portion and a schematic diagram of corresponding coordinate positions according to a comparative embodiment.

10 is a schematic diagram of the X-axis position offset and the corresponding time of the Y-axis position when the mutual-capacitive touch panel detects the linear movement of the touch object along the Y-axis according to the embodiment.

FIG. 11 shows the traces measured by the mutual capacitive touch panel of the first embodiment of the present invention and the mutual capacitive touch panel of the comparative embodiment when the touch objects draw lines along different rows of the array schematic diagram.

FIG. 12 is a schematic top view of a mutual capacitive touch panel according to a second embodiment of the present invention.

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

FIG. 14 is a schematic top view of a mutual capacitive touch panel according to a fourth embodiment of the present invention.

FIG. 15 is a schematic top view of a mutual capacitive touch panel according to another variant embodiment of the first embodiment of the present invention.

The component numbers in the figure are explained as follows:

10, 100, 100’, 200, 300, 400 mutual capacitive touch panel

102 substrate 102a touch area

102b Peripheral area C1, C1' first conductive layer

C2, C2’ second conductive layer IN insulating layer

E, DEL, DEM, DER, E4 electrodes

ES1 First electrode series ES2 Second electrode series

E1 First electrode E2 Second electrode

CD Row Direction CS Connecting Line Segment

CS1 first connecting line segment CS2 second connecting line segment

EP Extension CP1 First Connection

ELM, ELM1, ELM1’, ELM2, ELM3 Electrode Strip Sets

EL, EL7, EL8, EL9 electrode strips RD column direction

ELA1, ELA2 Electrode part ELB1, ELB3 Shield part

SP1 1st strip G gap

EL1 First electrode strip EL2 Second electrode strip

EL3 third electrode strip ES3 third electrode series

CS3 third connecting line segment

BP branch FE floating electrode

CL1 First lead CL2 Second lead

CP2 Second connection part P1 First pad

P2 2nd pad TO touch object

SP2 Second strip part CP3 Third connection part

SL slit Z vertical projection direction

Detailed ways

In order to enable those skilled in the art to further understand the utility model, the embodiments of the utility model are specifically listed below, and the composition content and the desired effect of the utility model are described in detail with reference to the accompanying drawings. It should be noted that the accompanying drawings are all simplified schematic diagrams, therefore, only the components and combination relations related to the present utility model are shown to provide a clearer description of the basic structure of the present utility model, and the actual components and layout may be more accurate. complex. In addition, for the convenience of description, the components shown in the drawings of the present utility model are not drawn in proportion to the number, shape, and size of the actual implementation, and the detailed proportions can be adjusted according to design requirements.

Please refer to FIG. 2 , which shows a schematic side view of the mutual capacitive touch panel of the present invention. As shown in FIG. 2 , the mutual capacitive touch panel 100 of this embodiment has a touch area 102a and a peripheral area 102b, wherein the touch area 102a is used to set the driving electrodes and sensing electrodes, and the peripheral area 102b is used to set the connection wire. In this embodiment, the peripheral area 102b may surround the touch area 102a, but it is not limited thereto. The mutual capacitive touch panel 100 includes a first conductive layer C1, a second conductive layer C2 and an insulating layer IN, wherein the insulating layer IN is disposed between the first conductive layer C1 and the second conductive layer C2, the first conductive layer C1 and The second conductive layer C2 can be electrically insulated from each other through the insulating layer IN disposed therebetween, and the second conductive layer C2 is adjacent to the first conductive layer C1 for a touch object for inputting commands. The touch object can be, for example, a finger or a stylus. In this embodiment, the mutual capacitive touch panel 100 may further include a substrate 102, and the second conductive layer C2, the insulating layer IN and the first conductive layer C1 are sequentially formed on the same first side of the substrate 102, and the substrate The second side of 102 opposite to the first side is the side close to the touch object. The stacking structure of the mutual capacitive touch panel of the present invention is not limited thereto. In another embodiment, the first conductive layer C1 and the second conductive layer C2 can also be formed on the film respectively, and the substrate 102 is attached to the film provided with the second conductive layer C2 through two adhesive layers and the set The film with the first conductive layer C1 is bonded to the film with the second conductive layer C2 to form a mutual capacitive touch panel 100. In this embodiment, the film located between the first conductive layer C1 and the second conductive layer C2 The thin film between them can be used as the insulating layer IN. In yet another embodiment, the first conductive layer C1, the insulating layer IN and the second conductive layer C2 can also be directly formed on the display surface of the display panel in sequence, such as a color filter substrate of a liquid crystal display panel or an organic light emitting display panel. on the package cover plate, and cover the substrate 102 on the first conductive layer C1. In addition, the substrate 102 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.

Please refer to FIG. 3 to FIG. 5A. FIG. 3 is a schematic top view of a mutual capacitive touch panel according to the first embodiment of the present invention, FIG. 4 is a schematic top view of the first conductive layer according to the first embodiment of the present invention, and FIG. 5A is a schematic top view of the first conductive layer of the present invention. A schematic top view of the second conductive layer according to an embodiment. As shown in FIG. 3 and FIG. 4 , the first conductive layer C1 includes a plurality of electrodes E arranged in an array and located in the touch area 102 a. In each row of the array, there are at least a first electrode series ES1 in which electrodes E in (N×M)-1 columns are electrically connected to each other, and a first electrode series ES1 in which electrodes E in N×M columns are electrically connected to each other. In the two-electrode series ES2, N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1. Specifically, the electrodes E include at least M first electrodes E1 and M second electrodes E2. The first electrodes E1 are located in (N×M)-1 columns, the second electrodes E2 are located in N×M columns, the first electrodes E1 in the same row are electrically connected to each other to form the first electrode series ES1, and the second electrodes E2 in the same row They are electrically connected to each other to form a second electrode series ES2. That is to say, when the first electrodes E1 electrically connected to each other are defined as one type of electrodes E, and the second electrodes E2 electrically connected to each other are defined as another type of electrodes E, the arrangement of electrodes E in each row can be It is understood as: take N different types of electrodes E as a group, and repeat the arrangement M times in sequence. In this embodiment, N is equal to 2, so the first electrodes E1 are located in odd columns (ie, 2M−1 columns), and the second electrodes E2 are located in even columns (ie, 2M columns). That is to say, in each row of the array, the first electrodes E1 and the second electrodes E2 are alternately arranged sequentially along the row direction CD of the array. In another embodiment shown in FIG. 15 , N is equal to 3, then the first electrode E1 is located in the 3M-1 column, the second electrode E2 is located in the 3M column, and the third electrode E3 is additionally located in the 3M-2 column. Its specific structure is described in detail later. In this embodiment where N is equal to 2, in order to electrically connect the first electrodes E1 in the same row and the second electrodes E2 in the same row, the first conductive layer C1 further includes a plurality of connection line segments CS, including the first connection Line segment CS1 and a plurality of second connecting line segments CS2, each first connecting line segment CS1 is respectively connected to two adjacent first electrodes E1 in the corresponding first electrode series ES1 (that is, two phases in the same row and different odd-numbered columns) adjacent to the first electrode E1) to form the first electrode series ES1, and each second connection line segment CS2 connects two adjacent second electrodes E2 in the corresponding second electrode series ES2 (that is, located in the same row and different even-numbered columns Two adjacent second electrodes E2) to form the second electrode series ES2. In this embodiment, the first connecting line segment CS1 and the second connecting line segment CS2 corresponding to the first electrode E1 and the second electrode E2 in the same row are respectively arranged on both sides of the first electrode E1 and the second electrode E2 in the same row, for example, respectively It is arranged on the left side and the right side or oppositely, so that the first connection line segment CS1 and the second connection line segment CS2 can be staggered, so as to form the first connection line segment electrically connected to the first electrodes E1 in the same row in the same first conductive layer C1 CS1 is electrically connected to the second connection segment CS2 of the second electrode E2 in the same row, and the first electrode series ES1 and the second electrode series ES2 formed by the first conductive layer C1 can be insulated from each other. Each connecting line segment CS can also be subdivided into an extension EP extending along the row direction CD of the array and two first connecting parts CP1 not parallel to the extending part EP, and each first connecting part CP1 connects the extending part EP to the corresponding Electrode E. In this embodiment, the first electrodes E1 and the second electrodes E2 of each row overlap and align with each other in the row direction CD of the array. Moreover, the first connecting line segment CS1 does not overlap with the first electrode E1 of the corresponding first electrode series ES1 in the row direction CD of the array, and the second connecting line segment CS2 does not overlap with the corresponding second electrode E1 in the row direction CD of the array. The second electrodes E2 of the electrode series ES2 overlap. In addition, any two adjacent electrodes E located in the same column but different rows may be separated and insulated from each other, so that the first electrode series ES1 in different rows are insulated from each other and the second electrode series ES2 in different rows are insulated from each other.

As shown in FIG. 3 and FIG. 5A , the second conductive layer C2 includes a plurality of electrode strip groups ELM1 insulated from each other, which are sequentially arranged in the touch area 102a along the row direction CD of the array, and each electrode strip group ELM1 includes N The electrode strips EL respectively extend along the column direction RD of the array and overlap with the electrodes corresponding to a column in the vertical projection direction Z. Moreover, each electrode strip EL includes a plurality of electrode portions ELA1 and a plurality of shielding portions ELB1 , and each electrode portion ELA1 and each shielding portion ELB1 are alternately connected in series along the column direction RD of the array. More specifically, in each electrode strip EL, each electrode portion ELA1 can be arranged corresponding to one of the electrodes E, that is, overlap with one of the corresponding electrodes E in the vertical projection direction Z of each electrode portion ELA1, and Each shielding portion ELB1 overlaps with one of the connecting line segments CS located on the first conductive layer C1 in the vertical projection direction Z. In this embodiment, each electrode portion ELA1 is used to generate capacitive coupling with the corresponding electrode E to form a touch unit for detecting the position of the touch object. Each shielding part ELB1 is used to shield the influence of the signal connecting the line segment CS on the coupling capacitance generated between each electrode part ELA1 and the corresponding electrode E. Further, each electrode portion ELA1 may include a first strip portion SP1 connecting two adjacent shielding portions ELB1 in the same electrode strip EL. Moreover, the width of each shielding portion ELB1 in the row direction CD of the array is larger than the width of each first strip portion SP1 in the row direction CD of the array, so that each shielding portion ELB1 can effectively shield the area located on the first conductive layer C1. Connect line segments CS. In addition, each shielding portion ELB1 may cover at least a part of the extension portion EP of the corresponding connecting line segment CS. For example, the width of each shielding portion ELB1 in the row direction CD of the array is greater than or equal to 10% of the width of each electrode E in the row direction CD of the array. More preferably, the width of each shielding portion ELB1 in the row direction CD of the array is greater than or equal to 50% of the width of each electrode E in the row direction CD of the array. In addition, two adjacent shielding portions ELB1 between electrodes E of two adjacent rows are separated from each other with a gap G therebetween, and in this case, between electrodes E of two adjacent rows Two adjacent shielding parts ELB1 can be as close as possible to effectively shield the corresponding connecting line segment CS. For example, in terms of the yellow light process, the minimum limit for separating two adjacent shielding portions ELB1 is about 0.05 mm, so the gap G between two adjacent shielding portions ELB1 between two adjacent row electrodes E Can be greater than or equal to about 0.05 mm, but is not limited thereto. In terms of the screen printing process, the minimum limit for separating two adjacent shielding portions ELB1 is about 0.3 mm, so the gap G between two adjacent shielding portions ELB1 between two adjacent row electrodes E can be greater than or Equal to about 0.3 mm, but not limited thereto. It can be seen that, with the conditions of different manufacturing processes or the evolution of manufacturing processes, the gap G between two adjacent shielding portions ELB1 may also be reduced or different. It is worth noting that there is no floating electrode between the two adjacent shielding portions ELB1 located between the electrodes E in two adjacent rows, so as to avoid the influence of the connecting line segment CS on the induction of the electrode bar EL through the floating electrode. In this embodiment, the first electrode series ES1 and the second electrode series ES2 are respectively driving electrodes for transmitting driving signals, and each electrode strip group ELM1 is for sensing electrodes for generating sensing signals according to corresponding driving signals. Not limited to this. In another embodiment, the first electrode series ES1 and the second electrode series ES2 can also be sensing electrodes respectively, and each electrode strip group ELM1 is a driving electrode.

Furthermore, each electrode portion ELA1 of this embodiment may further include a plurality of branch portions BP protruding from both sides of each first strip portion SP1, so that the first strip portion SP1 of each electrode portion ELA1 and the branch portion The BP constitutes a grid electrode, thereby increasing the capacitance variation of each touch unit when it is touched by a touch object and not touched by a touch object. The shape of each electrode portion of the present invention is not limited thereto, and may also be other shapes.

In this embodiment, N is equal to 2, and each electrode strip group ELM1 may include two electrode strips EL, that is, the first electrode strip EL1 and the second electrode strip EL2, and the first electrode strip EL1 in each electrode strip group ELM1 It is electrically connected with the second electrode strip EL2 (the connection is shown in FIG. 3 and described later). Since the first electrode strip EL1 and the second electrode strip EL2 of the same electrode strip group ELM1 are adjacent to each other, they can overlap with the first electrode E1 and the second electrode E2 of two adjacent columns respectively, that is, they can overlap with the first electrode E2 respectively. The series ES1 and the second electrode series ES2 are capacitively coupled, so that the same electrode strip group ELM1 can form two different touch units with the first electrode series ES1 and the second electrode series ES2 in the same row. In this embodiment, the width of each electrode E on the row direction CD of the array can be greater than the width of the first strip portion SP1 of each electrode strip EL on the row direction CD of the array, so the electrode E can effectively shield and block the display pair. The effect of the electrode strips EL is used to improve the touch accuracy of the mutual capacitive touch panel 100 . Further, since each first electrode strip EL1 straddles a corresponding row of first electrodes E1, each shielding portion ELB1 of each first electrode strip EL1 is a second connecting line segment passing between the first electrodes E1 respectively. CS2 overlaps. Similarly, since each second electrode strip EL2 straddles a corresponding column of second electrodes E2, each shielding portion ELB1 of each second electrode strip EL2 is respectively connected to a first connecting line segment CS1 passing between the second electrodes E2. overlapping. In this embodiment, the width of each shielding portion ELB1 in the direction CD can be close to the width of the electrode E, so one of the shielding portions ELB1 of one of the first electrode strips EL1 is connected to the first electrode E1 Two adjacent first connecting line segments CS1 of one of them overlap, and one of the shielding portions ELB1 of one of the second electrode strips EL2 is connected to two adjacent first connecting line segments CS1 of one of the second electrodes E2. Both connecting line segments CS2 overlap. Specifically, each shielding portion ELB1 of each first electrode bar EL1 can cover the first connecting portion CP1 of two first connecting line segments CS1 adjacent to the corresponding second connecting line segment CS2, and each shielding portion CP1 of each second electrode bar EL2 The shielding portion ELB1 can cover the first connecting portion CP1 of the two second connecting line segments CS2 adjacent to the corresponding first connecting line segment CS1, thereby improving the effect of shielding the connecting line segment CS. In another embodiment, both sides of each shielding portion ELB1 in the direction RD can extend to directly above the electrodes E on both sides thereof, so that each shielding portion ELB1 can partially overlap the electrodes E on both sides.

In addition, the second conductive layer C2 may optionally further include a plurality of floating electrodes FE, wherein the floating electrodes FE are separated from each other and from the electrode strips EL, so the floating electrodes FE are not electrically connected to the electrode strips EL, and It is also not electrically connected to other signal terminals, so that the floating electrode FE is in a floating state. In this embodiment, the floating electrodes FE may be respectively disposed between two adjacent branch portions BP or between the branch portion BP and the shielding portion ELB1. Through the arrangement of the floating electrodes FE, the space between the electrode strips EL can be filled as much as possible, so that the pattern of the electrode strips EL is not easy to be recognized by human eyes visually, thereby reducing the reliability of the mutual capacitive touch panel 100. Vision. It should be noted that the floating electrodes FE need to be arranged directly above the electrodes E of each row, so that the floating electrodes FE will not overlap with the connecting line segment CS in the vertical projection direction Z and generate capacitive coupling. Specifically, taking the same row of electrodes E as an example, each electrode E has two opposite sides in the column direction RD, and the floating electrode FE corresponding to the row of electrodes E needs to be disposed between the two opposite sides. In a variant embodiment, as shown in FIG. 5B , the second conductive layer C2' may not include floating electrodes, but only include the electrode strip group ELM1.

The connection method of the electrode strips EL between the electrode strip groups ELM1 will be described below. In this embodiment, the mutual capacitive touch panel 100 may further include a plurality of first wires CL1 and a plurality of second wires CL2 disposed on the substrate 102 in the peripheral region 102b. Each first wire CL1 is electrically connected to each first electrode series ES1 and each second electrode series ES2, and each second wire CL2 is electrically connected to each electrode strip EL of each electrode strip group ELM1. Specifically, the first wire CL1 and the second wire CL2 may include silver or a transparent conductive material, for example. The first wire CL1 can extend from the peripheral area 102b to the touch area 102a to connect with the corresponding first connecting line segment CS1 or the second connecting line segment CS2. Each first wire CL1 and the electrode E can be formed by the same first conductive layer C1 or by different conductive layers. Each second conductive line CL2 may include two second connecting portions CP2, respectively connected to the electrode strips EL of the same electrode strip group ELM1, and each second conductive line CL2 may be formed by the same second conductive layer C2 as the electrode strip EL or by a different material. The conductive layer is formed. In addition, the mutual capacitive touch panel 100 may further include a plurality of first pads P1 and a plurality of second pads P2 disposed on the substrate 102 in the peripheral region 102b on the same side of the touch region 102a. Each first pad P1 is electrically connected to each first wire CL1, and each second pad P2 is electrically connected to each second wire CL2.

In another variant embodiment shown in FIG. 15 , when N is equal to 3, each row of the array includes not only the first electrode series ES1 and the second electrode series ES2 , but also the third electrode series ES3 . In the first conductive layer C1' of this variation embodiment, the electrodes E include at least M first electrodes E1, M second electrodes E2, and M third electrodes E3. The first electrodes E1 in the 3M-1 column are electrically connected to each other to form a first electrode series, the second electrodes E2 in the 3M column are electrically connected to each other to form a second electrode series ES2, and the third electrodes in the 3M-2 column are electrically connected to each other to form a second electrode series ES2. The electrodes E3 are electrically connected to each other to form a third electrode series ES3, wherein the first electrode series ES1, the second electrode series ES2 and the third electrode series ES3 are insulated from each other. Moreover, in addition to the first connecting line segment CS1 and the second connecting line segment CS2, the connecting line segment CS may also include a plurality of third connecting line segments CS3, respectively connected to two adjacent third electrodes E3 located in the same row and 3M-2 column between. Correspondingly, each electrode strip group ELM1' may include three electrode strips EL electrically connected to each other, which are respectively the first electrode strip EL1, the second electrode strip EL2 and the third electrode strip EL3, and correspond to the electrodes of the same row of electrodes E The strip EL can generate capacitive coupling with each electrode E and form a touch unit. Each second wire CL2 is respectively electrically connected to the first electrode strip EL1, the second electrode strip EL2 and the third electrode strip EL3 of each electrode strip group ELM1'. Under the same number of touch control units, the number of the second wires CL2 used to electrically connect the electrode strips EL in this variation embodiment can be less than the number of the second wires CL2 used to electrically connect the electrode strips EL in the first embodiment, so it is more The width of the peripheral area 102b for setting the second wire CL2 of the mutual-capacitive touch panel 100' 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 effect of the shielding portion shielding the connecting line segment will be described in detail below. Please refer to FIG. 6 to FIG. 8, FIG. 6 shows a schematic diagram of the electric force line to the corresponding electrode bar when the connecting line segment is not shielded by the shielding part, and FIG. 7 shows a schematic diagram of the electric force line to the corresponding electrode bar when the connecting line segment is provided with a dummy electrode , FIG. 8 is a schematic diagram of a power line in which the connecting line segment of the present invention is shielded by the corresponding shielding portion. As shown in FIG. 6 , when the connecting line section CS has no shielding portion disposed directly above it, the voltage signal transmitted to the connecting line section CS will generate a force line extending to the upper surface of the electrode strip EL. In this way, when the touch object is placed on the electrode strip EL, the electric force line on the electrode strip EL will obviously be affected by the touch object and change, so that the mutual capacitive touch panel will detect the connection between the line segment CS and the electrode. The coupling capacitance of the strip EL changes, resulting in inaccurate detection. As shown in Figure 7, when a dummy electrode DE is provided directly above the connecting line segment CS, since the dummy electrode DE is not electrically connected to the electrode bar EL, nor is it electrically connected to other signal terminals, it is in a floating state. ) state electrodes, so when the connecting line segment CS transmits a voltage signal, the dummy electrode DE will be in an equipotential state with the connecting line segment CS due to capacitive coupling, that is to say, the dummy electrode DE will also have the same potential as the connecting line segment CS In this way, the dummy electrodes DE will generate electric force lines extending to the upper surface of the electrode strips EL. Therefore, the mutual capacitive touch panel will also detect the change in the coupling capacitance between the connecting line segment CS passing through the dummy electrode DE and the electrode strip EL, resulting in inaccurate detection. As shown in Figure 8, since the shielding part ELB1 (a part of the electrode strip EL) of the present invention shields the connecting line segment CS, the electric force line generated by the voltage signal of the connecting line segment CS will only extend to the lower surface of the electrode bar EL, and It does not extend to the upper surface of the electrode strip EL, so when the touch object is placed on the electrode strip EL, the electric force line will not be affected, that is to say, the voltage signal connecting the line segment CS will not affect the detection of the touch object , so as to improve the precision of touch control.

The differences between the mutual capacitive touch panels with and without the shielding portion will be further compared below. Please refer to FIG. 9 and FIG. 10. FIG. 9 shows a top view of a mutual capacitive touch panel without a shielding portion of a comparative embodiment and a schematic diagram of the corresponding coordinate positions. FIG. 10 shows a mutual capacitive touch panel of a comparative embodiment. A schematic diagram of the X-axis position offset and the corresponding time of the Y-axis position when the panel detects that the touch object moves linearly along the Y-axis. As shown in FIGS. 9 and 10 , when the touch object TO moves linearly along the Y axis (as shown by the arrow A in FIG. 9 ), the movement measured from the electrode strip EL is not a straight line, as shown in FIG. 9 The measurement point P is shown. Since the area of the touch object TO is larger than the area of a single electrode, the detected X-axis position will be calculated based on the inductance of the electrode strip EL corresponding to the electrodes DEL, DEM, and DER, which means that the electrode strip EL is measured from the electrode DEL. The measured inductance is calculated according to the corresponding X-axis coordinate 2. Similarly, the inductance measured by the electrode strip EL from the electrode DEM and the electrode DER is calculated according to the corresponding X-axis coordinates 3 and 4. calculate. Wherein, the electrode strip EL8 located at the Y-axis coordinate 8 and the electrode strip EL9 located at the Y-axis coordinate 9 are located in the same electrode strip group ELM, and are electrically connected to each other. Take the touch object TO moving linearly along the Y-axis direction between the X-axis coordinates 3 and 4 as an example, when the electrode strip EL7 detects the maximum Gaussian inductance, the touch object TO is judged The Y-axis position of the center point is still at 7, and when the maximum Gaussian sensing value is detected by the electrode strip EL8, it is determined that the Y-axis position of the center point of the touch object TO is at 8. Therefore, when the center point of the touch object TO moves from Y-axis coordinate 7 to Y-axis coordinate 8 in a straight line, when the center point of the touch object TO is approximately at the positive angle between Y-axis coordinates 7 and 8 In the middle, the inductance measured by the electrode strip EL7 from the electrode DER is 109, but the inductance measured by the electrode strip EL8 from the electrode DER is 131, so the calculated X-axis position is 3 from the X-axis coordinate The Gaussian offsets are 0.2744 and 0.4578 respectively, that is to say, when the touch object TO is close to the same point, the corresponding X-axis positions detected by the mutual capacitive touch panel 10 of the comparative embodiment are quite different. , causing a sudden change in the Gaussian offset, resulting in inaccurate detection. Similarly, the sudden change of the Gaussian offset also exists when the center point of the touch object TO moves from the coordinate 9 on the Y axis to the coordinate 10 on the Y axis. That is to say, when the touch object TO straddles different electrode strip groups ELM, it will be influenced by the connecting line segment CS to cause the left-right fluctuation of the X-axis position.

Please refer to FIG. 11 and Table 1. FIG. 11 shows the mutual capacitive touch panel of the first embodiment of the present invention and the mutual capacitive touch panel of the comparative embodiment when the touch objects draw lines along different rows of the array. Schematic diagram of the measured line-drawing trajectories. As shown in Figure 11 and Table 1, the curves from left to right of the first embodiment and the comparative embodiment correspond to the electrodes in the first row to the fifth row respectively, and the distance between the center points of two adjacent electrodes in the same column ( That is, the pitch (pitch) of the electrodes in the X-axis direction is about 4.5 millimeters as an example, the X-axis position error detected by the mutual capacitive touch panel 10 of the comparative embodiment is about 0.4969 millimeters on average, and the X-axis position The percentage of error accounting for the pitch of the electrodes in the X-axis direction is about 11.04% on average, while the X-axis position error detected by the mutual capacitive touch panel 100 of the first embodiment of the present invention is about 0.19712 mm on average, and The X-axis position error as a percentage of the electrode pitch in the X-axis direction averaged about 4.379%. It can be seen that, compared with the comparative embodiment, since the mutual-capacitive touch panel 100 of this embodiment has the shielding portion ELB1, the detected trajectory can be more in line with the straight line that the touch object moves, that is, it can Effectively reduce the error of the X-axis position, thereby improving the detection accuracy of the X-axis position.

Table 1

The double-layer mutual capacitive touch panel of the present invention is not limited to the above-mentioned embodiments. In order to facilitate the comparison of the differences between the first embodiment and other embodiments and to simplify the description, the same symbols are used to mark the same elements in other embodiments below, and mainly focus on the differences between the first embodiment and other embodiments. The differences will be described, and the repeated parts will not be repeated.

Please refer to FIG. 12 , which is a schematic top view of a mutual capacitive touch panel according to a second embodiment of the present invention. As shown in FIG. 12 , compared with the first embodiment, each electrode portion ELA2 of the mutual capacitive touch panel 200 provided by this embodiment is in a grid shape. In addition to the first strip portion CP1, each electrode strip EL of each electrode strip group ELM2 further includes a plurality of second strip portions SP2, a plurality of third connection portions CP3 and a plurality of branch portions BP, and the first strip One of the shape portions CP1 , one of the second strip portions SP2 , two of the third connection portions CP3 and four of the branch portions BP constitute a grid electrode. For example, in addition to the first strip portion SP1, each electrode portion ELA2 also includes a second strip portion SP2, two third connection portions CP3 and four branch portions BP. The second strip portion SP2 is parallel to the first strip portion SP1 and connects two adjacent shielding portions ELB1 . Each third connection portion CP3 is respectively connected between the first strip portion SP1 and the second strip portion SP2, and a part of the branch portion BP extends from the side of the first strip portion SP1 opposite to the third connection portion CP3. Another part of the branch portion BP extends from the side of the second strip portion SP2 opposite to the third connection portion CP3, so that each electrode portion ELA2 can be in a grid shape. In another embodiment, the second conductive layer may not include a floating electrode.

Please refer to FIG. 13 , which is a schematic top view of a mutual capacitive touch panel according to a third embodiment of the present invention. As shown in FIG. 13 , compared with the first embodiment, in one of the electrode strip groups ELM3 of the mutual capacitive touch panel 300 provided by this embodiment, the electrodes E located between two adjacent rows Two adjacent shielding parts are connected to each other to form a single shielding part ELB3. In other words, the same electrode strip group ELM3 in this embodiment may include multiple shielding portions ELB3, and each shielding portion ELB3 is connected to the electrode portion ELA1 of the first electrode strip EL1 and the electrode portion ELA1 of the second electrode strip EL2, thereby The shielding part ELB3 of this embodiment can shield more parts of the connecting line segment CS. The second conductive layer in this embodiment may not include a floating electrode. In another embodiment, the second conductive layer may include a floating electrode.

Please refer to FIG. 14 , which is a schematic top view of a mutual capacitive touch panel according to a fourth embodiment of the present invention. As shown in FIG. 14 , compared with the first embodiment, each electrode E4 of the mutual capacitive touch panel 400 provided in this embodiment may include a slit SL, and one of the corresponding first strip portions SP1 or overlap. Specifically, each slit SL may at least partially overlap each electrode portion ELA1. In this embodiment, each slit SL may also have a grid shape to overlap with the branch portion BP and the first strip portion SP1 of each electrode portion ELA1. Compared with the coupling capacitance between each electrode E of the first embodiment and the corresponding electrode part ELA1, since each electrode E4 of this embodiment has a slit SL overlapping with the electrode part ELA1, each electrode E4 and the electrode part ELA1 The coupling capacitance between can be reduced. For example, when each of the first electrode series ES1 and each of the second electrode series ES2 can be sensing electrodes respectively, and each electrode strip group ELM1 is respectively a driving electrode, the electric force lines generated from each electrode strip group ELM1 will be relatively large. Multiple parts extend to the electrode E4 that is not covered by each electrode strip group ELM1, so that there will be more changes in the electric force line when the touch object touches, so the capacitance change detected by the electrode E4 can be increased through the slit SL . Moreover, in this case, the second conductive layer C2 does not have a floating electrode, so as to avoid shielding the electrodes E4 of each first electrode series ES1 and each second electrode series ES2 from induction.

To sum up, in the mutual capacitive touch panel of the present invention, each electrode strip is provided with a shielding portion overlapping with the connecting line segment, and the width of the shielding portion can be greater than the width of the first strip portion, so the shielding portion The power lines generated by the connecting line segments can be shielded, so that the detection accuracy of the mutual capacitive touch panel can be effectively improved.

Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims (16)

1. a kind of mutual-capacitive touch panel has a Touch Zone and a peripheral region, it is characterised in that the mutual-capacitive touch panel Including：

One first conductive layer, including：

Multiple electrodes are arranged in an array, and in the Touch Zone, wherein in every a line of the array, are located at (N × M)- The electrode of 1 row is electrically connected to each other into a first electrode tandem, and is electrically connected to each other into one second positioned at the electrode of N × M row Electrode tandem, N are the positive integer more than or equal to 2, and M is the positive integer more than or equal to 1；And

A plurality of connecting line segment, including a plurality of first connecting line segment and a plurality of second connecting line segment, and respectively first connecting line segment point Two adjacent electrodes in one of corresponding first electrode tandem are not connected, and respectively second connecting line segment is separately connected corresponding Two adjacent electrodes in one of second electrode tandem；

One second conductive layer is set to above first conductive layer, which includes M electrode strips insulated from each other Group, along the line direction sequential of the array in the Touch Zone, respectively the electrode strip group includes N strip electrode items, respectively the electrode Item extends respectively along the column direction of the array and is overlapped respectively on a upright projection direction with the electrode of a corresponding row, wherein Respectively the electrode strip includes multiple first stripes and multiple shielding portions, respectively first stripes with the respectively shielding portion along the battle array The column directions of row is alternately connected, respectively the setting of one of first stripes difference counter electrode, respectively the shielding portion respectively with it is right One of multiple connecting line segment answered is overlapped on the upright projection direction, and respectively line direction of the shielding portion in the array On width be more than each width of first stripes on the line direction of the array；And

One insulating layer is set between first conductive layer and second conductive layer.

2. mutual-capacitive touch panel as described in claim 1, it is characterised in that include separately a plurality of conducting wire, be set to the peripheral region It is interior, and respectively the electrode strip of the respectively electrode strip group is electrically connected in the conducting wire.

3. mutual-capacitive touch panel as described in claim 1, which is characterized in that multiple electrode include M first electrode with And M second electrode, the M first electrode are located at the row of (N × M) -1, which is located at N × M row, respectively the electrode strip The electrode strip of group includes a first electrode item and a second electrode item, and multiple shielding portions of one of multiple first electrode items One of it is Chong Die with one of multiple second connecting line segments.

4. mutual-capacitive touch panel as claimed in claim 3, which is characterized in that the person's in multiple first electrode item should The person in multiple shielding portions and two adjacent multiple first connecting line segments for being connected to one of multiple first electrode Overlapping.

5. mutual-capacitive touch panel as claimed in claim 3, which is characterized in that one of multiple second electrode item is somebody's turn to do One of multiple shielding portions are Chong Die with one of multiple first connecting line segment.

6. mutual-capacitive touch panel as claimed in claim 5, which is characterized in that the person's in multiple second electrode item should The person in multiple shielding portions and two adjacent multiple second connecting line segments for being connected to one of multiple second electrode Overlapping.

7. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the shielding portion is on the line direction of the array Width be respectively greater than or equal to the respectively electrode in 10 of the width on the line direction of the array.

8. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the shielding portion is on the line direction of the array Width be respectively greater than or equal to the respectively electrode in 50 percent of the width on the line direction of the array.

9. mutual-capacitive touch panel as described in claim 1, which is characterized in that two be located between the electrode of two adjacent rows Do not have floating electrode between adjacent shielding portion.

10. mutual-capacitive touch panel as described in claim 1, which is characterized in that in one of the M electrode strip group, Two adjacent shielding portions between the electrode of two adjacent rows are separated from one another.

11. mutual-capacitive touch panel as described in claim 1, which is characterized in that in one of the M electrode strip group, Two adjacent shielding portions between the electrode of two adjacent rows are connected to each other.

12. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the electrode strip includes separately multiple points respectively Branch extends from the both sides of respectively first stripes, and respectively first stripes and a part for multiple branch is made to constitute One gate-shaped electrode.

13. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the electrode strip includes separately a plurality of the respectively Two stripes, multiple interconnecting pieces and multiple branches, and in one of multiple first stripes, multiple second stripes One of, the two in multiple interconnecting piece constitute a grid electrodes with four in multiple branch.

14. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the electrode includes a slit, and corresponding One of multiple first stripes are overlapped.

15. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the first electrode tandem with respectively this second Electrode tandem is respectively a driving electrodes, and respectively the electrode strip group is an induction electrode.

16. mutual-capacitive touch panel as described in claim 1, which is characterized in that respectively the first electrode tandem with respectively this second Electrode tandem is respectively an induction electrode, and respectively the electrode strip group is a driving electrodes.