CN110083276B - Touch panel and signal detection method thereof - Google Patents
Touch panel and signal detection method thereof Download PDFInfo
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- CN110083276B CN110083276B CN201910100304.8A CN201910100304A CN110083276B CN 110083276 B CN110083276 B CN 110083276B CN 201910100304 A CN201910100304 A CN 201910100304A CN 110083276 B CN110083276 B CN 110083276B
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- 238000001514 detection method Methods 0.000 title abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 description 23
- 239000002356 single layer Substances 0.000 description 9
- -1 IZO) Chemical compound 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
- 229910052738 indium Inorganic materials 0.000 description 8
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 6
- 229910052733 gallium Inorganic materials 0.000 description 6
- 229910021393 carbon nanotube Inorganic materials 0.000 description 4
- 239000002041 carbon nanotube Substances 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- BEQNOZDXPONEMR-UHFFFAOYSA-N cadmium;oxotin Chemical compound [Cd].[Sn]=O BEQNOZDXPONEMR-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 2
- LFKMKZZIPDISEK-UHFFFAOYSA-L magnesium;4-carboxy-2,6-dihydroxyphenolate Chemical compound [Mg+2].OC1=CC(C([O-])=O)=CC(O)=C1O.OC1=CC(C([O-])=O)=CC(O)=C1O LFKMKZZIPDISEK-UHFFFAOYSA-L 0.000 description 2
- PNHVEGMHOXTHMW-UHFFFAOYSA-N magnesium;zinc;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Zn+2] PNHVEGMHOXTHMW-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- RRKGBEPNZRCDAP-UHFFFAOYSA-N [C].[Ag] Chemical compound [C].[Ag] RRKGBEPNZRCDAP-UHFFFAOYSA-N 0.000 description 1
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 1
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000012937 correction Methods 0.000 description 1
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- HRHKULZDDYWVBE-UHFFFAOYSA-N indium;oxozinc;tin Chemical compound [In].[Sn].[Zn]=O HRHKULZDDYWVBE-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- AHADSRNLHOHMQK-UHFFFAOYSA-N methylidenecopper Chemical compound [Cu].[C] AHADSRNLHOHMQK-UHFFFAOYSA-N 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch panel and a signal detection method thereof, wherein the touch panel comprises a substrate, a plurality of node areas are defined on the substrate, each node area comprises at least two transmitting terminal electrodes extending along a first direction, and a receiving terminal electrode extending along the first direction and positioned between the two transmitting terminal electrodes.
Description
The patent application of the invention is a divisional application of the patent application of the invention with the application date of 2014, 01, 14, the application number of 201410015912.6 and the name of touch panel and signal detection method thereof.
Technical Field
The present invention relates to the field of touch control, and in particular, to a touch panel and a detection method thereof.
Background
In the market of various consumer electronic products, portable electronic products such as Personal Digital Assistants (PDAs), mobile phones (mobile phones), notebook computers (notebook PCs) and tablet PCs (tablet PCs) have widely used touch panels (touch panels) as interface tools for data communication, and particularly, under the driving of the demands of tablet computers requiring humanized designs, the touch panels have become one of the key components.
The mutual inductance type single-layer electrode touch panel is a known touch panel, although the mutual inductance type single-layer electrode touch panel has a multi-point touch function, since nodes are fully distributed on the whole touch panel, and each node must have at least one wire connected with a transmitting end electrode (Tx), the disadvantage of the mutual inductance type single-layer electrode touch panel is that the number of wires required by the whole touch panel is large, and the wires cannot be staggered with each other because the touch panel is of a single-layer structure, so that the area of a peripheral area required by the touch panel is larger to accommodate the wires, and the display range of the touch panel is further limited.
Therefore, the mutual inductance type single-layer electrode touch panel in the prior art has the defect that the mutual inductance type single-layer electrode touch panel is difficult to overcome.
Disclosure of Invention
In view of the above, an object of the present invention is to effectively reduce the number of wires while maintaining the multi-touch function.
The invention provides a touch panel, which comprises a substrate, wherein a plurality of node areas are defined on the substrate and are arranged on the substrate, each node area comprises at least two transmitting end electrodes extending along a first direction, and a receiving end electrode is arranged along the first direction and is positioned between the two transmitting end electrodes.
According to an embodiment of the present invention, the receiving terminal electrodes included in each node area arranged in the same row in the first direction are in a continuous structure.
According to an embodiment of the present invention, each of the transmitting-end electrodes has a plurality of first branch electrodes extending outwardly from each of the transmitting-end electrodes in a second direction; each receiving terminal electrode has a plurality of second branch electrodes extending outwardly from each receiving terminal electrode toward the second direction.
According to an embodiment of the present invention, each of the first branch electrodes and each of the second branch electrodes are arranged in a comb shape, and each of the first branch electrodes and each of the second branch electrodes are not in direct contact.
According to an embodiment of the present invention, the area sizes of the first branch electrodes located in each node area are different from each other, and the area sizes of the second branch electrodes are different from each other.
According to an embodiment of the present invention, a length of each of the first branch electrodes included in one of the transmitting-end electrodes in each of the node regions gradually changes from long to short from one end to the other end in the first direction, and a length of each of the first branch electrodes included in the other transmitting-end electrode gradually changes from short to long.
According to an embodiment of the present invention, the first branch electrodes in each node area have different pitches, and the second branch electrodes have different pitches.
According to an embodiment of the present invention, the number of the first branch electrodes included in each node region arranged in the same column in the first direction is different from each other, and the number of the second branch electrodes included in each node region is also different from each other.
According to an embodiment of the present invention, at least two or more node areas are arranged in the same column in the first direction.
According to an embodiment of the present invention, boundaries of the node regions arranged on the substrate are aligned with each other.
According to an embodiment of the present invention, the apparatus further includes a plurality of wires respectively connected to each of the transmitting terminal electrodes and each of the receiving terminal electrodes.
The invention further provides a detection method of the touch panel, which comprises the following steps: firstly, a touch panel is provided, the touch panel comprises a substrate, a plurality of node areas are defined on the substrate and are arranged on the substrate, each node area comprises at least two transmitting end electrodes extending along a first direction, a receiving end electrode is arranged along the first direction and is positioned between the two transmitting end electrodes, then the touch panel is touched, and the touch position of the touch panel is determined according to a capacitance change value generated by each node area.
According to an embodiment of the present invention, the touch location is located between two adjacent node areas, and the touch location is determined by a ratio of capacitance change values generated by the two adjacent node areas.
According to an embodiment of the present invention, the touch location is located in a node area, two capacitance change values with different magnitudes are generated by the receiving end electrode and the two transmitting end electrodes in the node area, and the touch location is determined by a ratio of the two capacitance change values.
The invention is characterized in that a plurality of node areas are orderly arranged on the touch panel, and each node area is internally provided with two groups of transmitting end electrodes and a receiving end electrode, and each transmitting end electrode and each receiving end electrode are provided with branch electrodes with different areas, densities and numbers, so that the position of a touch point can be further accurately found in a large range of node areas by calculating the ratio of capacitance change values generated by the two groups of transmitting end electrodes to the receiving end electrodes respectively. Therefore, compared with the conventional mutual inductance type single-layer electrode touch panel, the area of each node area can be made larger to reduce the number of nodes required for achieving the sensing function, thereby reducing the number of wires of the touch panel and reducing the use area of the peripheral area.
Drawings
Fig. 1 is a schematic view of a touch panel according to a preferred embodiment of the invention.
Fig. 2 shows a partial enlarged view of the area a in fig. 1.
Fig. 3 is a top view of a touch panel structure according to an embodiment of the invention.
Fig. 4 is a top view of a touch panel according to another preferred embodiment of the invention.
Fig. 5 is a schematic enlarged view of a portion of an electrode structure in a node area according to the present invention.
Fig. 6 shows a variation of the electrode structure of fig. 5.
Fig. 7 shows a variation of the structure of the other electrode in fig. 5.
Wherein reference numerals are as follows:
1. 2 touch panel
10. Substrate board
12. 12A, 12B, 12C, 12' node area
14. Conducting wire
20A, 20B emitter electrode
22A, 22B first branch electrode
22A, 22B first branch electrode
30. Receiving terminal electrode
32. Second branch electrode
A. Region B
C. D, E touch point
Detailed Description
The following description of the preferred embodiments of the present invention will be presented to enable those skilled in the art to make a further understanding of the invention, and is made in detail by reference to the accompanying drawings.
For convenience of description, the drawings of the present invention are only schematic in nature, so that a user can easily understand the present invention, and detailed proportions of the components in the drawings may be adjusted according to design requirements. With respect to the relative positioning of the components in the figures described herein, those skilled in the art will understand the relative positioning of the objects and will therefore be able to invert to present the same elements, and therefore all shall fall within the scope of the present description.
Referring to fig. 1 to 2, fig. 1 is a schematic view of a touch panel according to a preferred embodiment of the invention, and fig. 2 is a partial enlarged view of a region a in fig. 1. As shown in fig. 1, the touch panel 1 of the present invention includes a substrate 10, on which a plurality of node areas 12 are arranged on the substrate 10. In addition, the substrate further includes a plurality of wires 14, wherein one end of each wire 14 is connected to an electrode structure (not shown in fig. 1) in the node area 12, and the other end is connected to an external processor (not shown in the figure) in a centralized manner. It should be noted that, in the present embodiment, the node areas 12 (such as the node area 12A and the node area 12B in fig. 1) arranged in the same column in a first direction (such as the Y-axis) are directly connected to each other, and the sensing areas (such as the node area 12A and the node area 12C in fig. 1) in different columns are separated from each other by the conductive line 14, but each node area 12 has a boundary aligned with the boundary of the other node areas 12 in the same row and the same column, that is, in the present embodiment, the top edge and the bottom edge of each node area 12 (that is, the upper boundary and the lower boundary of each node area 12 in fig. 1) are aligned with the top edge and the bottom edge of the other node areas 12 in the same row, respectively. Likewise, the sides of any node region 12 are also aligned with the sides of other node regions 12 on the same column.
Referring to fig. 2, each node area 12 includes two emitter electrodes, namely an emitter electrode 20A and an emitter electrode 20B, which are arranged along a first direction (such as a Y-axis). The node region 12 further includes a receiving-side electrode 30, and the receiving-side electrode 30 is disposed between the transmitting-side electrode 20A and the transmitting-side electrode 20B, which are also aligned along a first direction (such as a Y-axis). In addition, in the present invention, the transmitting electrode 20A, the transmitting electrode 20B and the receiving electrode 30 each have a plurality of branch electrodes extending outwards in a second direction (X-axis in the present embodiment), which are the first branch electrode 22A, the first branch electrode 22B and the second branch electrode 32, respectively. The present embodiment is described with reference to fig. 2, in which the first branch electrode 22A extends rightward from the transmitting-end electrode 20A, the first branch electrode 22B extends leftward from the transmitting-end electrode 20B, and the second branch electrode 32 extends leftward and rightward from the body of the receiving-end electrode 30. It should be noted that, in the same node region 12, the length of the first branch electrode 22A gradually changes from long to short from one end to the other end (such as from top to bottom in fig. 2), and at the same time, the length of the first branch electrode 22B gradually changes from short to long. When the length of the first branch electrode 22A or the first branch electrode 22B is longer, the length of the second branch electrode 32 corresponding to the position of the first branch electrode 22A or the first branch electrode 22B on the receiving end electrode 30 is longer.
In more detail, as shown in the upper left region B of fig. 2, the length of each first branch electrode 22A gradually changes from long to short from above to below the Y-axis, and the length of each first branch electrode 22B gradually changes from short to long. Meanwhile, as the length of the first branch electrode 22A or the first branch electrode 22B is longer, the length of the second branch electrode 32 corresponding to the position thereof is longer. In other words, the length of the second branch electrode 32 extending from above to below along the Y-axis is gradually changed from long to short at the position on the left side of the receiving-end electrode 30. Meanwhile, the length of the second branch electrode 32 located at the right side of the receiving terminal electrode 30 is gradually changed from short to long. It is noted that in the present invention, not all the length variations of the branch electrodes in the node area are the same as this area B, but they follow the following rules: (1) In the case where the first branch electrode 22A extends from one end to the other end in the first direction in the same node region, the first branch electrode 22B must gradually change from long to short if it gradually changes from short to long, and vice versa. (2) When the length of the first branch electrode 22A or the first branch electrode 22B is longer, the length of the second branch electrode 32 located on the same side on the receiving-end electrode 30 is longer, and vice versa.
In addition, it should be noted that, since the electrode of the present invention has a single-layer structure, the first branch electrode 22A, the first branch electrode 22B and the second branch electrode 32 are not in direct contact with each other, but at least one gap is left between each two. Preferably, the first branch electrodes 22A and the second branch electrodes 32 are arranged in a comb shape, and the first branch electrodes 22B and the second branch electrodes 32 are also arranged in a comb shape, so as to enhance the interaction capacitance generated between the transmitting end electrode and the receiving end electrode, and the capacitance variation generated in the subsequent step of touching the upper region of the electric pole is also obvious.
As shown in fig. 1-2, at least one wire 14 is connected to the emitter electrode 20A and the emitter electrode 20B in any node region 12, and each node region 12 arranged in the same column in the first direction (such as the Y-axis) shares a receiver electrode 30. That is, a complete receiver electrode 30 passes through the range of node areas 12 on the same column, and only one wire is required to connect with the receiver electrode 30.
Regarding the materials of the emitter electrode 20A, the emitter electrode 20B, and the receiver electrode 30 in the present invention, transparent materials such as Indium Tin Oxide (ITO), indium zinc oxide (indium zinc oxide, IZO), cadmium tin oxide (cadmium tin oxide, CTO), aluminum zinc oxide (aluminum zinc oxide, AZO), indium zinc tin oxide (indium tin zinc oxide, ITZO), tin oxide (tin oxide), zinc oxide (zinc oxide), cadmium oxide (cam ium oxide), hafnium oxide (hafnium oxide, hfO), indium gallium zinc oxide (indium gallium zinc oxide, inGaZnO), indium gallium zinc magnesium oxide (indium gallium zinc magnesium oxide, inGaZnMgO), indium gallium magnesium oxide (indium gallium magnesium oxide, inGaMgO), indium gallium aluminum oxide (indium gallium aluminum oxide, inGaAlO), carbon Nanotubes (CNT), silver Carbon nanotubes or copper Carbon nanotubes, or other transparent conductive materials and metal or non-metal composite materials may be used for the conductive wire 14, but the present invention is not limited thereto.
Fig. 3 is a top view of a touch panel according to an embodiment of the invention. As shown in fig. 3, in the present embodiment, the length and width of each node region 12 are equal, and the number of the first branch electrodes 22A, the first branch electrodes 22B, and the second branch electrodes 32 included in each node region 12 is also the same. However, the present invention is not limited thereto, and various embodiments of the touch panel of the present invention will be described below. For simplicity of explanation, the following description mainly refers to the differences between the embodiments, and the details of the differences will not be repeated. In addition, like components in the various embodiments of the present invention are labeled with like reference numerals to facilitate cross-reference between the various embodiments.
Fig. 4 is a top view of a touch panel according to another preferred embodiment of the invention. As shown in fig. 4, the touch panel 2 includes a substrate 10, and a plurality of node areas 12 'are arranged on the substrate 10, which is different from the touch panel 1 shown in fig. 1 in that the sizes of the node areas 12' in the present embodiment are not limited to be the same. That is, the area of each node area 12' can be adjusted according to the actual requirement. Therefore, the number of the first branch electrodes (not shown) and the second branch electrodes (not shown) included in each node area 12' may also be changed according to actual needs. The number of first branch electrodes 22A and first branch electrodes 22B included in the different node regions 12' may be the same or different.
In addition, the shapes, sizes, and arrangement densities of the emitter electrode 20A and the emitter electrode 20B inside the respective node areas 12' may be adjusted according to actual needs. Referring to fig. 5 to 7, fig. 5 illustrates an electrode structure in a node area according to the present invention, and fig. 6 to 7 illustrate two different embodiments of the electrode structure in the node area according to the present invention. As shown in fig. 5, a node area 12' includes a transmitting electrode 20A, a transmitting electrode 20B, a receiving electrode 30, a plurality of first branch electrodes 22A, a plurality of first branch electrodes 22B, and a plurality of second branch electrodes 32, and the structure thereof is substantially the same as the area B shown in fig. 2, and the detailed description thereof will be omitted. Fig. 6 is a variation of fig. 5, and the main difference is that the widths of each of the first branch electrode 22A, the first branch electrode 22B and the second branch electrode 32 are widened, and the widths of the branch electrodes are increased, so as to help to reduce the process difficulty and improve the yield, and the method is suitable for products with lower requirements on touch accuracy. Of course, the present invention is not limited thereto, and the width of each branch electrode can be adjusted according to the actual requirement, and can be freely widened or narrowed, which is also included in the scope of the present invention.
Referring again to fig. 7, fig. 7 is another variation of fig. 5, and is different from fig. 5 mainly in that the density of arrangement of the branch electrodes is not fixed but freely adjustable. Taking fig. 7 as an example, the branched electrodes are arranged more closely for the region in which the branched electrodes are longer, and conversely, the branched electrodes are arranged more loosely for the region in which the branched electrodes are shorter. Of course, the present invention is not limited to the arrangement shown in fig. 7, and the arrangement of the branch electrodes may be adjusted according to actual requirements.
The above-described variations of the embodiments shown in fig. 4 to 7 may be combined with each other, for example, the different node areas 12' of the touch panel in fig. 4 may include branch electrodes with different sizes, widths, and arrangement densities, which also falls within the scope of the present invention.
The touch point detection method of the touch panel of the present invention will be described below. First, a touch panel is provided, and the structure of the touch panel is the same as that of the above embodiment, and further description is omitted herein. Then, the touch panel is touched, for example, the local touch panel shown in fig. 2, and when the range of the touch point is located in a node area 12 (such as point C shown in fig. 2, which represents the range of the touch point), the capacitance change value generated by the touch point can be immediately sensed by the receiving terminal electrode 30 in the node area 12. Therefore, in the present embodiment, the X-coordinate of the touch point can be determined by the receiving electrode 30. As for the Y-axis coordinate of the touch point, it can be calculated by the following formula:
wherein:
y=y-axis coordinates of the touch point.
y1=the Y-axis coordinates of the first endpoint represented within the node region.
y2=the Y-axis coordinates of the other endpoint represented within the node region.
Δc—1=the capacitance change value between the first endpoint and the receiving terminal electrode represented in the node area.
Δc—2=the capacitance change value between the other end point represented in the node area and the receiving-end electrode.
α, β = weight parameter
More specifically, the receiving electrode 30 and the transmitting electrodes 20A and 20B on the left and right sides respectively generate capacitance change values Δc_1 and Δc_2 with different magnitudes, and the coordinates of the upper and lower end points of the transmitting electrodes 20A and 20B on the left and right sides are y1 and y2 respectively. It should be noted that the endpoint coordinates herein are calculated by the Y-axis coordinates of the longest branch electrode on the emitter electrode, that is, the node area 12 in which the area B is located in fig. 2, Y1 is the uppermost Y-axis coordinate of the left emitter electrode 20A, and Y2 is the lowermost Y-axis coordinate of the right emitter electrode 20B. It will be appreciated that the y1 and y2 coordinates herein are based on the electrode pattern shown in FIG. 2, and that the y1 and y2 coordinates will be adjusted when the electrode patterns are different. The α and β are correction parameters, which are adjusted according to various conditions such as the shape, width, arrangement density, etc. of the electrodes on both sides. According to the above formula, the receiving electrode 30 and the transmitting electrodes 20A and 20B on the left and right sides generate capacitance change values Δc_1 and Δc_2 with different magnitudes, respectively, to perform proportional distribution, so as to calculate the Y-axis coordinate. It should be noted that the calculated Y-axis coordinate is closer to the coordinate at the end with larger capacitance change, for example, the longer the branch electrode is located above the left emitter electrode 20A in the node area 12 where the area B is located, so that the larger the capacitance change is. When Δc—1 is larger, the capacitance change value generated by the left transmitting electrode 20A and the left receiving electrode 30 is larger, so that the calculated touch point position is located above the node area 12. Vice versa, as ΔC_2 increases, the calculated touch point position is located lower in the node area 12. According to the calculation of the above formula, the position of the touch point (i.e. the touch position) can be finely subdivided again within the range of the single node area 12, so that the single node area 12 can have a larger area, and thus the number of node areas on the whole touch panel can be reduced.
When the touch position is located at the junction of two different node areas on the Y-axis (such as the touch point D shown in fig. 2, which represents the range of the touch point), a capacitance change value with a certain magnitude is generated in both the upper and lower node areas, and thus can be calculated by the following formula:
wherein:
y=y-axis coordinates of the touch point.
y1=the Y-axis coordinate represented by one of the nodes.
y3=the Y-axis coordinate represented by another node.
Δc—1=the capacitance change value between the transmitting-end electrode and the receiving-end electrode of one of the node areas.
Δc—3=the capacitance change value between the transmitting-end electrode and the receiving-end electrode of the other node region.
α, β = weight parameter
Through the calculation of the formula, the capacitance change values respectively generated by the upper node area and the lower node area can be proportionally distributed, so that the Y-axis coordinate of the touch point can be accurately calculated, and the calculation principle is similar to that described in the previous paragraph and is not repeated.
As for the touch position, if the touch position is located at the junction of two different node areas on the X-axis (such as the touch point E shown in fig. 2, which represents the range of the touch point), a capacitance change value with a certain magnitude is generated in both the left and right adjacent node areas, and thus can be calculated by the following formula:
wherein:
x = X-axis coordinates of the touch point.
x1=the X-axis coordinate represented by one of the nodes.
X2 = X-axis coordinate represented by another node.
Δc—1=the capacitance change value between the transmitting electrode and the receiving electrode of one of the node areas.
Δc—2=the capacitance change value between the transmitting-end electrode and the receiving electrode of the other node region.
α, β = weight parameter
Through the calculation of the formula, the capacitance change values generated by the left node area and the right node area can be proportionally distributed, so that the X-axis coordinate of the touch point can be accurately calculated, and the calculation principle is similar to that described in the previous paragraph and is not repeated.
The invention is characterized in that a plurality of node areas are arranged in order on the touch panel, and each node area is internally provided with two groups of transmitting end electrodes and a receiving end electrode. Because each transmitting end electrode and each receiving end electrode are provided with branch electrodes with different areas, densities and numbers, the touch position can be further accurately found in a large-range node area by calculating the ratio of capacitance change values generated by the two groups of transmitting end electrodes to the receiving end electrodes respectively. Therefore, compared with the conventional mutual inductance type single-layer electrode touch panel, the area of each node area can be made larger, so that the number of wires of the touch panel is reduced, and the use area of the peripheral area is reduced.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A touch panel, comprising:
a substrate; and
a plurality of node areas are defined on the substrate and are arranged along a first direction and a second direction, wherein each node area comprises:
at least two emitter electrodes each extending along the first direction, wherein the first direction is perpendicular to the second direction; and
and each receiving end electrode is provided with a second body part and a plurality of second branch electrodes, the second body parts are respectively extended from two sides of the second body parts of each receiving end electrode along the second direction towards each transmitting end electrode, wherein the distances between the second branch electrodes on the same side of the second body part and the first body parts of the transmitting end electrodes on the same side are different, the length of the first branch electrode contained in one transmitting end electrode along the second direction gradually changes from long to short along the first direction, and the length of the first branch electrode contained in the other transmitting end electrode along the second direction gradually changes from long to short along the second direction.
2. The touch panel of claim 1, wherein the substrate comprises at least two or more of the node regions arranged in a same column along the first direction and at least two or more of the node regions arranged in a same row along the second direction.
3. The touch panel of claim 1, wherein the boundary of any one of the node regions is mutually aligned with the boundary of another of the node regions located in the same row or column.
4. The touch panel of claim 1, wherein the receiving terminal electrodes of the node areas in the same column are structurally and electrically connected to each other in succession, and the transmitting terminal electrodes of the node areas in the same column are structurally and electrically separated from each other.
5. The touch panel of claim 1, wherein the plurality of first branch electrodes and the plurality of second branch electrodes are arranged in a comb shape, and each of the first branch electrodes and each of the second branch electrodes are staggered in the first direction and are not in direct contact.
6. The touch panel according to claim 1, wherein the area sizes of the first branch electrodes in the node regions are different from each other, and the area sizes of the second branch electrodes are different from each other.
7. The touch panel according to claim 1, wherein a pitch of the first branch electrodes in the first direction is different from each other in the node region, and a pitch of the second branch electrodes in the first direction is different from each other.
8. The touch panel according to claim 1, wherein each of the node areas located in the same column includes a different number of the first branch electrodes, and each of the node areas located in the same column includes a different number of the second branch electrodes.
9. The touch panel according to claim 1, wherein the first body portion of each of the transmitting-end electrodes and the second body portion of the receiving-end electrode are parallel to each other in the second direction.
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| CN201910100304.8A CN110083276B (en) | 2013-10-04 | 2014-01-14 | Touch panel and signal detection method thereof |
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| US201361886674P | 2013-10-04 | 2013-10-04 | |
| US61/886,674 | 2013-10-04 | ||
| TW102146767A TWI607351B (en) | 2013-10-04 | 2013-12-17 | Touch panel and detecting methods thereof |
| TW102146767 | 2013-12-17 | ||
| CN201410015912.6A CN104516573A (en) | 2013-10-04 | 2014-01-14 | Touch panel and signal detection method thereof |
| CN201910100304.8A CN110083276B (en) | 2013-10-04 | 2014-01-14 | Touch panel and signal detection method thereof |
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