CN110134293B

CN110134293B - Mutual capacitance type touch panel

Info

Publication number: CN110134293B
Application number: CN201810132248.1A
Authority: CN
Inventors: 许诚显; 洪国强; 江敬群; 郭玮伦; 丁鹏云
Original assignee: ILI Techonology Corp
Current assignee: ILI Techonology Corp
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2022-05-10
Anticipated expiration: 2038-02-09
Also published as: CN110134293A

Abstract

The invention discloses a mutual capacitance type touch panel which comprises a first electrode layer and a second electrode layer. The first electrode layer comprises a plurality of first electrode groups and a plurality of second electrode groups which are arranged into an array, the first electrode groups positioned in the same row are electrically connected into a first electrode series connection, and the second electrode groups positioned in the same row are electrically connected into a second electrode series connection. The second electrode layer comprises a plurality of electrode bar groups which are insulated from each other and are sequentially arranged along the row direction of the array, wherein each electrode bar group extends along the row direction of the array and is overlapped with the electrode groups of two adjacent rows in the vertical projection direction, and the two adjacent electrode bar groups are overlapped with the electrode groups of the same row in the vertical projection direction.

Description

Mutual capacitance type touch panel

Technical Field

The present invention relates to a mutual capacitance touch panel, and more particularly, to a mutual capacitance touch panel with a dual electrode layer.

Background

With the increasing development of science and technology, a touch display device composed of a display and a touch panel has a characteristic of human-computer interaction because the touch display device can simultaneously realize touch and display functions, and has been widely applied to electronic products such as smart phones (smart phones), satellite navigation systems (GPS navigator systems), tablet PCs (tablet PCs), and notebook PCs (laptop PCs). The mutually-capacitive touch panel has become a mainstream touch technology in the industry at present due to its advantages of high accuracy, multi-touch, high durability, high touch resolution, and the like.

The mutual capacitance touch technology mainly determines a touch event by detecting that a touch object is adjacent to or in contact with a touch unit on a touch panel due to the change of coupling capacitance generated between static electricity on the touch object and the touch unit. The mutual capacitance touch technology can be divided into two types, i.e., a single-layer electrode structure and a double-layer electrode structure, in terms of structural design. Because the double-layer electrode structure is simpler and easier than the single-layer electrode structure in structural design and control algorithm, the design of the double-layer electrode structure is generally applied to middle and high-order consumer electronic products. In the design of the conventional dual-layer electrode structure, the sensing series connection and the driving series connection respectively extend along the horizontal direction and the vertical direction which are perpendicular to each other, so that the wires connecting the sensing series connection are connected with the sensing series connection from the two sides of the sensing series connection, and the range of the peripheral area at the two horizontal sides of the touch panel is limited by the number of the wires and cannot be reduced.

Therefore, at present, it is developed to divide the driving series in the same row into two driving series and electrically connect two adjacent sensing series to each other, so as to reduce the number of wires connecting the sensing series, and further reduce the frame width of the touch panel. However, in this structure, when the touch object moves linearly along the Y-axis direction, the sensing coordinates sensed by the sensing cascade will have density. In other words, when the touch object moves linearly along the X-axis direction at different positions of the Y-axis in an equidistant manner, the distances between the lines sensed by the sensing cascade are not consistent, but the lines arranged along the Y-axis direction are alternately dense and dense, which causes inaccurate detection, as shown in fig. 1. Although this problem can be eliminated by the algorithm, it consumes computation resources and processing time, which results in a burden on the processor. Therefore, continuously improving the touch accuracy of the touch panel is an object of continuous efforts in the industry.

Disclosure of Invention

One objective of the present invention is to provide a mutual capacitance touch panel to improve the detection accuracy in the Y-axis direction.

To achieve the above objective, the present invention discloses a mutual capacitance touch panel, which includes a first electrode layer, a second electrode layer and an insulating layer. The first electrode layer comprises a plurality of electrode groups which are arranged into an array, wherein the electrode groups comprise a plurality of first electrode groups and a plurality of second electrode groups, the first electrode groups are positioned in odd rows, the second electrode groups are positioned in even rows, the first electrode groups positioned in the same row are electrically connected into a first electrode series, and the second electrode groups positioned in the same row are electrically connected into a second electrode series. The second electrode layer is disposed on the first electrode layer, and includes a plurality of electrode bar groups insulated from each other and sequentially arranged in the touch region along a row direction of the array, wherein each electrode bar group extends along a column direction of the array and overlaps the electrode groups of two adjacent columns in a vertical projection direction, and the electrode groups of two adjacent columns overlap the electrode groups of the same column in the vertical projection direction. The insulating layer is arranged between the first electrode layer and the second electrode layer. The electrode group of the first row and the electrode group of the last row of each row respectively comprise an electrode, the rest electrode groups at least comprise two electrodes which are arranged along the row direction of the array, and two adjacent electrodes of the first electrode groups of each row and two adjacent electrodes of the second electrode groups of each row are sequentially and alternately arranged along the row direction of the array.

In the mutually capacitive touch panel of the invention, because of the design that two adjacent electrodes of each first electrode group and two adjacent electrodes of each second electrode group are alternately arranged along the column direction, the detected position in the column direction and the actual position of the touch object do not generate deviation, and further the touch precision in the column direction (Y axis) can be effectively improved, thereby reducing the use of algorithms, reducing the consumption of operation resources and improving the touch response time.

Drawings

Fig. 1 illustrates a movement trace of a conventional mutual capacitance type touch panel when a touch object moves linearly along an X-axis direction at different positions of a Y-axis in an equidistant manner.

Fig. 2 is a schematic side view of the mutually-capacitive touch panel according to the present invention.

Fig. 3 is a schematic top view illustrating a mutually-capacitive touch panel according to a first embodiment of the invention.

Fig. 4 is a schematic top view of the electrode strip sets of the comparative embodiment in which the first electrode serial connection and the second electrode serial connection are the same as each other, and the first electrode serial connection and the second electrode serial connection are the same as each other.

Fig. 5A is a schematic diagram illustrating a relationship between the sensing quantity and the position of the mutual capacitance touch panel of the comparative embodiment and the first embodiment when the touch object is located at the position P2.

Fig. 5B is a schematic diagram illustrating a relationship between the sensing amount and the position of the mutual capacitance touch panel of the comparative embodiment and the first embodiment when the touch object is located at the position P3.

FIG. 6 is a schematic diagram showing electric field lines generated by the second electrode and the second electrode strips of different electrode strip groups according to the comparative example.

Fig. 7 is a schematic diagram illustrating electric lines of force generated by the second electrode of the other comparative embodiment through the floating electrode and the second electrode strips of different electrode strip groups.

Fig. 8 illustrates the movement tracks of the mutual capacitance touch panel of the first embodiment and the comparative embodiment when the touch object moves linearly along the X-axis direction at different positions of the Y-axis in an equidistant manner.

Fig. 9 is a schematic top view illustrating a mutually-capacitive touch panel according to a second embodiment of the invention.

Fig. 10 is a schematic top view illustrating a first electrode layer according to a second embodiment of the invention.

FIG. 11 is a schematic top view illustrating a second electrode layer according to a second embodiment of the invention.

Fig. 12 is a schematic top view illustrating a mutual capacitance touch panel according to a third embodiment of the invention.

Fig. 13 is a schematic top view illustrating a mutual capacitance touch panel according to a fourth embodiment of the invention.

Fig. 14 is a schematic side view of a mutual capacitance touch panel according to a fifth embodiment of the invention.

FIG. 15 is a schematic top view illustrating a mutual capacitance type touch panel according to a fifth embodiment of the disclosure

Description of the symbols

100. 100', 200, 300, 400, 500 mutual-capacitance touch panel

102 substrate 102a touch area

102b peripheral area TO touch object

1021 first side 1022 second side

C1, C1 'first electrode layer C2, C2' second electrode layer

Z vertical projection direction of IN insulating layer

EM1, EM1 'first electrode group EM2, EM 2' second electrode group

First electrodes of ES1, ES1 'and ES1' in CD row direction are connected in series

ES2, ES2', ES2 "second electrode series E, E', SE, E" electrodes

CE electrode connecting line segment CS1 first connecting line segment

CS2 second connecting line segment

ELM, ELM1, ELM2, ELM' electrode strip group

RD column direction EL1 first electrode stripe

Second electrode stripes P1, P2, P3 and P4 of EL2

E12', E14' first electrode E21', E23' second electrode

ELA electrode unit ELB shielding part

SP1 stripe SP2 crossing part

CL1 first conductive line CL2 second conductive line

SL, SL 'open-pore FE, FE' floating electrode

C' notches TR1, TR2 moving track

Detailed Description

In order to make those skilled in the art understand the present invention, the following embodiments are specifically illustrated and described in detail with reference to the accompanying drawings. It should be noted that the drawings are simplified schematic diagrams, and therefore, only the elements and combinations of the elements and the combinations related to the present invention are shown to provide a clearer description of the basic architecture of the present invention, and the actual elements and layout may be more complicated. For convenience of description, the elements shown in the drawings are not necessarily drawn to scale, and the specific scale may be adjusted according to design requirements.

Fig. 2 is a schematic side view of a mutual capacitance touch panel according to a first embodiment of the invention. As shown in fig. 2, the mutual capacitance touch panel 100 of the present embodiment is used for detecting a touch position of a touch object TO, and has a touch area 102a and a peripheral area 102b, wherein the touch area 102a is used for disposing driving electrodes and sensing electrodes, and the peripheral area 102b is used for disposing connecting wires. In the present embodiment, the peripheral area 102b may surround the touch area 102a, but not limited thereto. The mutual capacitance touch panel 100 includes a first electrode layer C1, a second electrode layer C2, and an insulating layer IN, wherein the insulating layer IN is disposed between the first electrode layer C1 and the second electrode layer C2, the first electrode layer C1 and the second electrode layer C2 are electrically insulated from each other by the insulating layer IN disposed therebetween, and the second electrode layer C2 is closer TO the touch object TO for inputting a command than the first electrode layer C1. The touch object TO may be a finger or a stylus, for example. IN the present embodiment, the mutual capacitance touch panel 100 may further include a substrate 102, and the second electrode layer C2, the insulating layer IN and the first electrode layer C1 are sequentially formed on the same first side 1021 of the substrate 102, and a second side 1022 of the substrate 102 opposite TO the first side 1021 is a side close TO the touch object TO. The stacking structure of the mutually-compatible touch panel 100 of the present invention is not limited thereto. IN another embodiment, the first electrode layer C1 and the second electrode layer C2 may be formed on the films respectively, and the substrate 102 is bonded to the film with the second electrode layer C2 and the film with the first electrode layer C1 is bonded to the film with the second electrode layer C2 through two adhesive layers to form the mutual capacitance touch panel 100. IN another embodiment, the first electrode layer C1, the insulating layer IN and the second electrode layer C2 may also be sequentially and directly formed on the display surface of the display panel, such as the color filter substrate of a liquid crystal display panel or the package cover of an organic light emitting display panel, and the substrate 102 is covered on the first electrode layer C1. In addition, the substrate 102 may include a hard substrate or a soft substrate, such as a glass substrate, a strengthened glass substrate, a quartz substrate, a sapphire substrate, a hard cover plate (cover lenses), a plastic substrate, a soft cover plate, a soft plastic substrate, or a thin glass substrate.

Fig. 3 is a schematic top view illustrating a mutually-capacitive touch panel according to a first embodiment of the invention. As shown in fig. 3, the first electrode layer C1 of the present embodiment includes a plurality of electrode sets arranged in an array and spaced apart from each other. The electrode sets may include a plurality of first electrode sets EM1 and a plurality of second electrode sets EM2, each of the first electrode sets EM1 and each of the second electrode sets EM2 in the same row are alternately arranged in sequence along a row direction CD (e.g., Y axis) of the array. In other words, in each column of the array, the first electrode set EM1 is in odd rows, the second electrode set EM2 is in even rows, the first electrode set EM1 in the same column is electrically connected to a first electrode series ES1, and the second electrode set EM2 in the same column is electrically connected to a second electrode series ES 2. In this embodiment, the electrode set in the first row of each row and the electrode set in the last row of each row respectively include an electrode E, and the rest of the electrode sets at least include two electrodes E arranged along the row direction CD of the array, so that the electrodes E can also be arranged in an array manner. The electrodes E of each electrode group are spaced from each other but electrically connected. In other words, two adjacent and electrically connected electrodes E of each first electrode group EM1 and two adjacent and electrically connected electrodes E of each second electrode group EM2 in the same row may be alternately arranged in sequence along the row direction CD. Each electrode group of the present embodiment may further include an electrode connecting line CE connecting two electrodes E, such that every two electrodes E adjacent to each other in the same row may be electrically connected to each other. The electrodes E may have the same size, but are not limited thereto.

The first electrode layer C1 may further include a plurality of first connection segments CS1 and a plurality of second connection segments CS2, each of the first connection segments CS1 is respectively connected to two adjacent first electrode groups EM1 located in the same row, so that the first electrode groups EM1 located in the same row may be connected in series to form a first electrode series ES1, and each of the second connection segments CS2 is respectively connected to two adjacent second electrode groups EM2 located in the same row, so that the second electrode groups EM2 located in the same row may be connected in series to form a second electrode series ES 2. The electrode E, the electrode connecting line segment CE, the first connecting line segment CS1 and the second connecting line segment CS2 are located on the same plane. In this embodiment, the first connection line segment CS1 corresponding to the first electrode group EM1 in the same row and the second connection line segment CS2 corresponding to the second electrode group EM2 in the same row are respectively disposed on two sides of the electrode group in the same row, for example, on the left side and the right side or vice versa, so that the first connection line segment CS1 and the second connection line segment CS2 may be staggered, so as to form the first connection line segment CS1 electrically connected to the first electrode group EM1 in the same row and the second connection line segment CS2 electrically connected to the second electrode group EM2 in the same row in the same first electrode layer C1, and the first electrode series ES1 and the second electrode series ES2 formed by the first electrode layer C1 may be insulated from each other. And, any two adjacent electrodes E in the same column but different rows are 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. In one embodiment, the electrodes E of each row overlap and are aligned with each other in the row direction CD of the array, and the first connection line segment CS1 and the second connection line segment CS2 do not overlap with each electrode E in the row direction CD of the array.

The second electrode layer C2 includes a plurality of electrode bar sets ELM insulated from each other, and sequentially arranged in the touch area 102a along the row direction CD of the array. Each electrode bar set ELM extends along the column direction RD of the array and overlaps the electrode sets of two adjacent columns in the vertical projection direction Z, and the two adjacent electrode bar sets ELM overlap the electrode sets of the same column in the vertical projection direction Z. Each electrode bar set ELM may include two electrode bars electrically connected to each other, each extending along a row direction RD (e.g., X-axis) of the array, and each electrode bar may overlap with an electrode E in the same row in the vertical projection direction Z. The electrode bars of each electrode bar set ELM may be electrically connected to each other in the touch area 102a or in the peripheral area 102 b. Specifically, the electrode bars of each electrode bar group ELM may be a first electrode bar EL1 and a second electrode bar EL2, respectively, wherein each first electrode bar EL1 overlaps an electrode E in the same row of the first electrode group EM1 in the vertical projection direction Z, respectively, so that each first electrode bar EL1 and the corresponding overlapped electrode E are capacitively coupled to each other to form a touch unit, and each second electrode bar EL2 overlaps an electrode E in the same row of the second electrode group EM1 in the vertical projection direction Z, respectively, so that each second electrode bar EL2 and the corresponding overlapped electrode E are capacitively coupled to each other to form another touch unit. Moreover, since the two electrodes E of each first electrode group EM1 are adjacent to each other, and the two electrodes E of each second electrode group EM2 are adjacent to each other, the two adjacent first electrode stripes EL1 are respectively overlapped with the two adjacent rows of electrodes E of the first electrode group EM1 in the same row, and the two adjacent second electrode stripes EL1 are respectively overlapped with the two adjacent rows of electrodes E of the second electrode group EM2 in the same row. In other words, since the two adjacent electrodes E of each first electrode group EM1 and the two adjacent electrodes E of each second electrode group EM2 in the same row are alternately arranged in sequence, each two adjacent first electrode strips EL1 and each two adjacent second electrode strips EL2 can also be alternately arranged in sequence along the row direction CD, so that the same electrode strip group ELM can overlap the electrodes E of different electrode groups (i.e., overlap one row of electrodes E of the first electrode group EM1 and one row of electrodes E of the second electrode group EM 2), and the different electrode strip groups ELM can overlap the electrodes E of the same electrode group that are electrically connected to each other (i.e., overlap two rows of electrodes E of the first electrode group EM1 or two rows of electrodes E of the second electrode group EM 2). With this configuration, when the touch object TO is located close TO the position between two adjacent electrode bar sets ELM, the detected sensing signal will not deviate toward the center of one electrode bar set ELM, so as TO improve the density alternation phenomenon generated by the linear movement along the row direction CD and improve the detection accuracy of the mutual capacitance touch panel 100.

In this embodiment, in order to make each electrode strip group conform to the design of two electrode strips, each first electrode group EM1 in the first row may respectively include only one electrode E, each second electrode group EM2 in the last row may respectively include only another electrode E, and each electrode group in the 2n row and (2n +1) row may include two electrodes, where n is a positive integer and 2n is less than the total number of rows of electrodes E. That is, the electrodes E in the first row and the second row are insulated from each other and can respectively overlap the first electrode stripes EL1 and the second electrode stripes EL2 of the same electrode stripe set ELM in the vertical projection direction Z. Similarly, the electrodes E1 in the penultimate row and the last row may overlap the first electrode stripe EL1 and the second electrode stripe EL2 of the same electrode stripe set ELM in the vertical projection direction Z, respectively. The design of the first electrode set and the second electrode set is not limited thereto. In addition, each of the first electrode series ES1 and each of the second electrode series ES2 may be a driving electrode for transmitting a driving signal, and each of the electrode strip sets ELM is a sensing electrode for generating a sensing signal according to a corresponding driving signal, but is not limited thereto. In another embodiment, each of the first electrode series ES1 and each of the second electrode series ES2 may also be a sensing electrode, and each of the electrode strip sets ELM may also be a driving electrode.

The mutual capacitance type touch panel 100 of the present embodiment may further include a plurality of first conductive lines CL1 and a plurality of second conductive lines CL2 disposed on the substrate 102 in the peripheral region 102 b. Each first conductive line CL1 is electrically connected to each first electrode series ES1 and each second electrode series ES2, respectively, and is used to electrically connect each first electrode series ES1 and each second electrode series ES2 to the corresponding pad. Each second conductive line CL2 is electrically connected to the first electrode bar EL1 and the second electrode bar EL2 of each electrode bar set ELM, respectively, for electrically connecting each electrode bar set ELM to the corresponding pad.

The mutual capacitance touch panel 100 of the present embodiment has an effect of overlapping the electrode E of the same electrode strip set ELM with the electrode of the different electrode set, and overlapping the electrode E of the different electrode strip set ELM with the electrode of the same electrode set, which are electrically connected to each other. Referring to fig. 4 to 7, fig. 4 is a schematic top view illustrating a first electrode series and a second electrode series of a comparative embodiment and a first electrode series and a second electrode series of a first embodiment corresponding to the same electrode strip group, fig. 5A is a schematic top view illustrating a relationship between an induction amount and a position of a mutual capacitive touch panel of the comparative embodiment and the first embodiment when a touch object is located at a position P2, fig. 5B is a schematic top view illustrating a relationship between an induction amount and a position of a mutual capacitive touch panel of the comparative embodiment and the first embodiment when a touch object is located at a position P3, fig. 6 is a schematic top view illustrating an electric line generated by a second electrode of the comparative embodiment and a second electrode strip of a different electrode strip group, fig. 7 is a schematic top view illustrating an electric line generated by a second electrode of another comparative embodiment through a floating electrode and a second electrode strip of a different electrode strip group, fig. 8 is an electric line generated by a mutual capacitive touch panel of the first embodiment and the comparative embodiment in a manner that a touch object is equidistant on a Y axis A movement locus detected when the position is linearly moved in the X-axis direction. As shown in fig. 4, the left first electrode series ES1' and the right second electrode series ES2' represent the mutual capacitance touch panel 100' of the comparative embodiment, and the right first electrode series ES1 and the right second electrode series ES2 represent the mutual capacitance touch panel 100 of the first embodiment. In the comparison embodiment, the second electrodes E21', E23' and the first electrodes E12', E14' are alternately arranged along the row direction CD, and the first electrode series ES1 'is formed by serially connecting the first electrodes E12' and E14 'of the same row, the second electrode series ES2' is formed by serially connecting the second electrodes E21 'and E23' of the same row, while the first electrode series ES1 of the embodiment is formed by serially connecting the first electrode group EM1 including two adjacent electrodes E, and the second electrode series ES2 is formed by serially connecting the second electrode group EM2 including two adjacent electrodes E.

As shown in fig. 4 and fig. 5A, when the touch object TO moves from the position P1 TO the position P2, the relationship between the sensing amount and the position detected by the mutual capacitance touch panel 100' of the comparative embodiment is a curve CV1, and the relationship between the sensing amount and the position detected by the mutual capacitance touch panel 100 of the first embodiment is a curve CV 2. In detail, when the touch-controlled object TO moves from the position P1 TO the position P2 (i.e. moves from the electrode bar set ELM1 TO the electrode bar set ELM2), in the comparison embodiment, in addition TO the variation of the coupling capacitance between the first electrode E12 'and the second electrode EL2 of the electrode bar set ELM2, the coupling capacitance between the second electrode E21' and the second electrode EL2 of the electrode bar set ELM2 varies. Since the second electrode E21' is electrically connected to the second electrode E23' and the second electrode strips EL2 of the electrode strip group ELM2 are electrically connected to the first electrode strips EL1, the change of the coupling capacitance between the second electrode E21' and the second electrode strips EL2 of the electrode strip group ELM2 is reflected in the change of the coupling capacitance between the second electrode E23' and the first electrode strips EL1 of the electrode strip group ELM2, that is, the sensing quantities of the second electrode E21' corresponding to the position P1 and the second electrode strips EL2 of the electrode strip group ELM2 corresponding to the position P2 are merged into the sensing quantity corresponding to the position P3, as shown by the arrow in fig. 5A. In other words, when the touch object TO is located at the position P2, the sensing amount of the mutual capacitance touch panel 100' of the comparative embodiment corresponding TO the position P3 is higher than the accurate value, so that the detected position is shifted toward the position P3. The second electrode E21' is capacitively coupled to the second electrode strips EL2 of the electrode strip group ELM2, for example, as shown in fig. 6, that is, the second electrode E21' is capacitively coupled to the second electrode strips EL2 of the electrode strip group ELM2 via a connecting line segment with the second electrode E23 '. As shown in fig. 7, in another comparative example, when the floating electrode FE is disposed between the second electrode bar EL2 of the electrode bar group ELM1 and the second electrode bar EL2 of the electrode bar group ELM2, the second electrode E21' is also capacitively coupled with the second electrode bar EL2 of the electrode bar group ELM2 via the floating electrode FE, so as to increase the sensing amount of the second electrode bar EL2 of the electrode bar group ELM 2.

However, in the present embodiment, since the electrode E at the corresponding position P1 and the electrode E at the corresponding position P2 are electrically connected TO each other, and the electrode E at the corresponding position P1 is not electrically connected TO the electrode E at the corresponding position P3, when the touch object TO moves from the position P1 TO the position P2, the change in the coupling capacitance between the electrode E at the corresponding position P1 and the second electrode bar EL2 of the electrode bar group ELM2 does not reflect the change in the coupling capacitance between the electrode E at the corresponding position P3 and the first electrode bar EL1 of the electrode bar group ELM2, such as the sensing amount shown by the arrow in fig. 5A. Therefore, when the touch object TO is located at the position P2, the sensing quantity detected by the electrode E corresponding TO the position P3 and the first electrode bar EL1 of the electrode bar group ELM2 in the embodiment is not interfered by the change of the coupling capacitance between the electrode E corresponding TO the position P1 and the second electrode bar EL2 of the electrode bar group ELM2, so that the sensing quantity detected by the mutual capacitance touch panel in the embodiment approaches an accurate value, the detected position can be prevented from shifting, and the detection accuracy of the touch object TO at the position P2 can be improved.

Similarly, as shown in fig. 4 and fig. 5B, when the touch object TO moves from the position P3 TO the position P4, the relationship between the sensing amount and the position detected by the mutual capacitance touch panel 100' of the comparative embodiment is a curve CV3, and the relationship between the sensing amount and the position detected by the mutual capacitance touch panel 100 of the first embodiment is a curve CV 4. When the touch-sensitive object TO is located at the position P3, in the comparative example, the change in the coupling capacitance between the first electrode E14 'and the first electrode bar EL1 of the electrode bar set ELM2 is reflected in the change in the coupling capacitance between the first electrode E12' and the second electrode bar EL2 of the electrode bar set ELM2, i.e., the sensing quantity incorporated into the corresponding position P2, as shown by the arrow in fig. 5B. Therefore, when the touch object TO is located at the position P3, the sensing amount detected by the first electrode E12 'and the second electrode bar EL2 corresponding TO the position P2 of the capacitive touch panel 100' of the comparative embodiment is higher than the sensing amount detected by the second electrode bar EL2, so that the detected position is shifted toward the position P2. However, in the embodiment, when the touch object TO is located at the position P3, the change of the coupling capacitance between the electrode E corresponding TO the position P4 and the first electrode bar EL1 of the electrode bar group ELM2 does not reflect TO the change of the coupling capacitance between the electrode E corresponding TO the position P2 and the second electrode bar EL2 of the electrode bar group ELM2, such as the sensing amount shown by the arrow in fig. 5B. Therefore, the sensing quantity detected by the electrode E corresponding TO the position P2 and the second electrode strip EL2 of the electrode strip group ELM2 is not interfered by the change of the coupling capacitance between the electrode E corresponding TO the position P4 and the first electrode strip EL1 of the electrode strip group ELM2, and the detection accuracy of the touch object TO at the position P3 is improved.

As shown in fig. 8, a movement locus TR1 (i.e., a dotted line shown in fig. 8) represents a movement locus detected by the mutually compatible touch panel 100' of the comparative embodiment when the touch object TO is linearly moved in the X-axis direction at different positions of the Y-axis in an equidistant manner, and a movement locus TR2 (i.e., a solid line shown in fig. 8) represents a movement locus detected by the mutually compatible touch panel 100 of the first embodiment when the touch object TO is linearly moved in the X-axis direction at different positions of the Y-axis in an equidistant manner. In contrast TO the design of the embodiment in which the first electrodes and the second electrodes are alternately arranged along the row direction CD, the farther the position of the touch object TO is from the center line of the electrode strip group, the larger the detected position deviation in the row direction CD is, and therefore, when the touch object TO moves linearly along the row direction CD, the sensed touch points are alternately arranged in a dense-dense manner. However, through the design of the present embodiment in which the two adjacent electrodes E of each first electrode group EM1 and the two adjacent electrodes E of each second electrode group EM2 are alternately arranged along the column direction CD, the detected position on the column direction CD and the actual position of the touch object TO do not deviate, so as TO effectively improve the touch accuracy of the mutual capacitive touch panel 100, thereby reducing the use of algorithms, reducing the consumption of computing resources, and improving the touch response time.

The mutual capacitance touch panel of the present invention is not limited to the above embodiments. In order to facilitate comparison of differences between the first embodiment and other embodiments and simplify the description, the same elements are denoted by the same symbols in the other embodiments below, and the differences between the first embodiment and other embodiments are mainly described, and repeated descriptions are omitted.

Referring to fig. 9 to 11, fig. 9 is a schematic top view illustrating a mutual capacitance touch panel according to a second embodiment of the present invention, fig. 10 is a schematic top view illustrating a first electrode layer according to the second embodiment of the present invention, and fig. 11 is a schematic top view illustrating a second electrode layer according to the second embodiment of the present invention. As shown in fig. 9 to 11, in comparison with the first embodiment, in the mutual capacitance touch panel 200 provided in the present embodiment, each electrode group may include two electrode connecting line segments CE disposed between two electrodes E, and each electrode strip may include a plurality of electrode portions ELA and a plurality of shielding portions ELB, where each electrode portion ELA and each shielding portion ELB are alternately connected in series along the column direction RD of the array. Specifically, in each electrode bar, each electrode portion ELA overlaps with one of the corresponding electrodes E in the vertical projection direction Z, so that each electrode portion ELA can be respectively used for generating capacitive coupling with the corresponding electrode E and forming a touch unit for detecting the position of a touch object, and each shielding portion ELB overlaps with one of the corresponding connecting line segments in the vertical projection direction Z, so that each shielding portion ELB can be used for shielding the influence of the signal of the connecting line segment on the coupling capacitance generated by each electrode portion ELA and the corresponding electrode E. In this embodiment, each electrode ELA may include two bar portions SP1 and a crossing portion SP2, the bar portion SP1 is connected between two adjacent shielding portions ELB, and the crossing portion SP2 crosses the two bar portions SP1, so that each electrode ELA is in a gate shape. In addition, the width of each shielding part ELB in the row direction CD of the array is larger than the width of each strip-shaped part SP1 in the row direction CD of the array, so that each shielding part ELB can effectively shield the connecting line segment. For example, the width of each shielding portion ELB in the row direction CD of the array is greater than or equal to ten percent of the width of each electrode E in the row direction CD of the array. More preferably, the width of each shielding portion ELB in the row direction CD of the array is greater than or equal to fifty percent of the width of each electrode E in the row direction CD of the array. It should be noted that there is no floating electrode between two adjacent shielding portions ELB between two adjacent rows of electrodes E, so as to avoid the influence of the connection line segment on the induction of the electrode strip through the floating electrode. The shape of the electrode portion ELA of the present invention is not limited to the above. In another embodiment, the shape of the electrode portion ELA may also be, for example, "#" or other shapes, depending on product requirements. In another embodiment, two adjacent shielding portions ELB of each electrode strip between two adjacent rows of electrodes E may be connected to each other.

In another embodiment, the second conductive layer C2 may optionally further include a plurality of floating electrodes separated from each other and from the electrode strips, so that the floating electrodes are in a floating state. The floating electrodes can be respectively arranged between two adjacent electrode strips so as to fill the space between the electrode strips as much as possible. Besides increasing the electrode induction, the patterns of the electrode strips are not easily recognized by human eyes in vision, so as to achieve the effect of making the mutual capacitance type touch panel simple and easy to read.

Fig. 12 is a schematic top view of a mutual capacitance touch panel according to a third embodiment of the invention. As shown in fig. 12, compared to the second embodiment, in the mutual capacitance touch panel 300 provided in the present embodiment, two electrodes E of each electrode group are connected to each other to form a single electrode SE. That is, the first electrode group EM1 may be composed of a single electrode SE overlapping with different electrode bar groups ELM, and the second electrode group EM2 may be composed of a single electrode SE overlapping with different electrode bar groups ELM. Therefore, each electrode group of the present embodiment does not need an additional electrode connecting line segment.

Fig. 13 is a schematic top view illustrating a capacitive touch panel according to a fourth embodiment of the disclosure. As shown in fig. 13, compared to the second embodiment, each electrode E' of the mutual capacitance touch panel 400 provided in the present embodiment may include an opening SL substantially overlapping with the corresponding electrode portion ELA. In this embodiment, each opening SL may have a grid shape to substantially overlap the two bar portions SP1 and the cross portion SP 2. Since each electrode E 'of the present embodiment has the opening SL substantially overlapping the electrode portion ELA, the coupling capacitance between each electrode E' and the electrode portion ELA can be reduced. For example, when each of the first electrode series ES1 and each of the second electrode series ES2 are respectively sensing electrodes and each of the electrode strip sets ELM is a driving electrode, a large portion of the electric lines of force generated from each of the electrode strip sets ELM extend to the electrode E 'not shielded by each of the electrode strip sets ELM, so that a large amount of electric lines of force are changed when the touch object touches the touch object, and thus the capacitance variation detected by the electrode E' can be increased through the opening SL. In another embodiment, the first electrode layer C1 may include floating electrodes respectively disposed in the openings SL.

Referring to fig. 14 and 15, fig. 14 is a schematic side view of a mutual capacitance type touch panel according to a fifth embodiment of the disclosure, and fig. 15 is a schematic top view of the mutual capacitance type touch panel according to the fifth embodiment of the disclosure. As shown in fig. 14 and fig. 15, compared TO the first embodiment, in the mutual capacitance touch panel 500 provided in the present embodiment, the first electrode layer C1 "is closer TO the touch object TO than the second electrode layer C2". In the present embodiment, the electrode strip set ELM "is located in the second electrode layer C2", and the first electrode series ES1 "and the second electrode series ES2" are located in the first electrode layer C1", but not limited thereto. In another embodiment, the electrode strip set ELM "may also be located in the first electrode layer C1", and the first electrode series ES1 "and the second electrode series ES2" are located in the first electrode layer C1 ". In addition, the electrode strips of the electrode strip set ELM "may be combined into a single electrode strip, but is not limited thereto. In another embodiment, the electrode strip set ELM "may also include two electrode strips electrically connected to each other. In addition, the two electrodes E ″ of each electrode set of the present embodiment may be connected TO each other, and each electrode E ″ may have a plurality of recesses C "and a plurality of openings SL" overlapping the electrode bar set ELM "in the vertical projection direction Z, so that electric lines of force generated by the coupling capacitance between the electrode bars and the electrodes E ″ may extend TO the upper surface of the electrode E" through the recesses C "and the openings SL", so that the touch of the touch object TO may change the density of the electric lines of force, and thus, the coupling capacitance. In this embodiment, the first electrode layer C1 ″ may further include a plurality of floating electrodes FE ″ respectively disposed in the openings SL "and the recesses C" of the electrodes E ″. The recesses C "of two adjacent electrodes E" of the same row may be arranged opposite to each other for arranging the floating electrodes FE ". The floating electrodes FE ″ are spaced apart from each other and from the electrode E ″ so that the floating electrodes FE ″ are not electrically connected to the electrode E ″ and are also not electrically connected to other signal terminals, so that the floating electrodes FE ″ are in a floating state. For the same row electrode E ", each electrode E" has two opposite sides in the column direction RD, and the floating electrode FE "corresponding to the row electrode E" needs to be disposed between the two opposite sides. In another embodiment, the first electrode layer C1 ″ may not have a floating electrode. In the present embodiment, each of the first electrode series ES1 "and each of the second electrode series ES2" can be a sensing electrode for generating a sensing signal according to a corresponding driving signal, and each of the electrode strip sets ELM "is a driving electrode for transmitting the driving signal, but is not limited thereto. In another embodiment, each of the first electrode series ES1 "and each of the second electrode series ES2" may also be a driving electrode, and each of the electrode strip sets ELM "may also be a sensing electrode.

In summary, the mutually capacitive touch panel of the invention has a design in which two adjacent electrodes of each first electrode group and two adjacent electrodes of each second electrode group are alternately arranged along the column direction, so that the detected position in the column direction and the actual position of the touch object do not deviate, and the touch precision in the column direction (Y axis) can be effectively improved, thereby reducing the use of algorithms, reducing the consumption of computing resources, and improving the touch response time.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. A mutual capacitance touch panel for detecting a touch position of a touch object and having a touch area and a peripheral area, comprising:

a first electrode layer including a plurality of electrode groups arranged in an array, wherein the electrode groups include a plurality of first electrode groups and a plurality of second electrode groups, the first electrode groups are located in odd rows, the second electrode groups are located in even rows, the first electrode groups in a same column are electrically connected in a first electrode series connection, and the second electrode groups in the same column are electrically connected in a second electrode series connection; the first electrode layer further comprises a first connecting line section and a second connecting line section, the first connecting line section is respectively connected with two adjacent first electrode groups of the first electrode in series connection, the second connecting line section is respectively connected with two adjacent second electrode groups of the second electrode in series connection, and the first connecting line section and the second connecting line section are respectively arranged at two sides of the first electrode series connection and the second electrode series connection in the same row;

a second electrode layer disposed on the first electrode layer, the second electrode layer including a plurality of electrode strip groups insulated from each other, and sequentially arranged in the touch region along a row direction of the array, wherein each of the electrode strip groups extends along a row direction of the array and overlaps the electrode groups of two adjacent rows in a vertical projection direction, and the two adjacent electrode strip groups overlap the electrode groups of the same row in the vertical projection direction; and

an insulating layer disposed between the first electrode layer and the second electrode layer;

the electrode groups of the first row and the last row of each row respectively comprise an electrode, the rest electrode groups at least comprise two electrodes which are arranged along the row direction of the array, and two adjacent electrodes of the first electrode groups of each row and two adjacent electrodes of the second electrode groups of each row are sequentially and alternately arranged along the row direction of the array.

2. The mutual capacitance touch panel according to claim 1, wherein the two adjacent electrode bar sets respectively overlap the electrodes of one of the electrode sets in the vertical projection direction.

3. The mutual capacitance touch panel according to claim 2, wherein the electrodes of each electrode group are separated from each other, and each electrode group further comprises an electrode connecting line segment connecting the electrodes.

4. The mutual capacitance touch panel according to claim 2, wherein the electrodes of each electrode group are connected to each other.

5. The mutual capacitance touch panel according to claim 2, wherein each of the electrode strip sets includes a first electrode strip and a second electrode strip electrically connected to each other and respectively extending along the row direction of the array, two adjacent first electrode strips respectively overlap the electrodes in two adjacent rows of the first electrode sets in the same row, and two adjacent second electrode strips respectively overlap the electrodes in two adjacent rows of the second electrode sets in the same row.

6. The mutual capacitance touch panel according to claim 5, wherein each of the first electrode strips and one of the corresponding overlapped electrodes are capacitively coupled with each other to form a touch unit, and each of the second electrode strips and one of the corresponding overlapped electrodes are capacitively coupled with each other to form another touch unit.

7. The mutual capacitance touch panel according to claim 5, wherein the first electrode bar and the second electrode bar of each electrode bar group are respectively overlapped with the electrode groups of two adjacent rows in the vertical projection direction.

8. The mutual capacitance touch panel according to claim 5, wherein every two adjacent first electrode strips and every two adjacent second electrode strips are alternately arranged in sequence along the row direction of the array.

9. The mutual capacitance touch panel according to claim 5, further comprising a plurality of conductive wires disposed in the peripheral region, wherein each conductive wire is electrically connected to the first electrode bar and the second electrode bar of each electrode bar set.

10. The mutual capacitance touch panel according to claim 5, wherein each of the first electrode strips and each of the second electrode strips respectively comprises a plurality of electrode portions, and each of the electrode portions respectively overlaps a corresponding one of the electrodes.

11. The mutual capacitance touch panel according to claim 10, wherein each of the electrodes comprises an opening, and each of the openings substantially overlaps each of the electrode portions.

12. The mutual capacitance touch panel according to claim 1, wherein each of the first electrode series connections and each of the second electrode series connections are respectively a driving electrode, and each of the electrode strip sets is a sensing electrode.

13. The mutual capacitance touch panel according to claim 1, wherein each of the first electrode series connections and each of the second electrode series connections are respectively a sensing electrode, and each of the electrode strip sets is a driving electrode.

14. The mutual capacitance touch panel according to claim 1, wherein the second electrode layer is closer to the touch object than the first electrode layer.

15. The mutual capacitance touch panel according to claim 1, wherein the first electrode layer is closer to the touch object than the second electrode layer.