CN106155430A - Bar shaped self-tolerant touch pad and touch-control system - Google Patents
Bar shaped self-tolerant touch pad and touch-control system Download PDFInfo
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Abstract
The invention provides a kind of bar shaped self-tolerant touch pad and touch-control system, described touch pad includes: induction electrode, pcb board and device routing layer, wherein, described induction electrode is located at the upper surface of described pcb board, described device routing layer is located at the lower surface of described pcb board, described device routing layer is provided with touch pad controller and many first electrical interconnection lines, described touch pad controller is electrically interconnected line by described first and connects described induction electrode, the signal of telecommunication is provided for described induction electrode, and monitor finger in described induction electrode and touch or the electric capacity knots modification of electric capacity corresponding to close each region and the change order of maximum capacitor knots modification thereof.Pcb board in the present invention only need to be designed to double-layer structure, thus can significantly reduce manufacturing process complexity and the manufacturing cost of touch pad.
Description
Technical Field
The present disclosure relates to touch panels and touch systems, and particularly to a touch panel and a touch system.
Background
Wearable devices are becoming more and more popular and their manner of operation is continually challenged by ease of use. The strip-shaped capacitive touch pad has the advantages of convenience in operation, natural interaction, strong false triggering resistance and the like, and is a mainstream touch pad in wearable equipment. The conventional bar-type capacitive touch pad is mainly realized by a mutual capacitance technology, namely, an upper layer and a lower layer of grid lines are arranged in a bar-type touch area to sense the touch action of fingers, so that the operation gesture of a user is obtained. The touch panel is generally manufactured by adopting a four-layer PCB structure, namely a row scanning line, a column scanning line, a grounding layer and a device layer, when a finger touches the intersection of the row scanning line and the column scanning line, the capacitance of an induction electrode at the intersection changes, and therefore the touch position of the finger can be calculated.
However, the requirement of the mutual capacitance technology on the touch panel controller is very high, and the touch panel controller supporting the mutual capacitance scanning needs to be selected and configured with corresponding mutual capacitance scanning control software. In addition, the PCB with more layers leads the touch pad to have high manufacturing cost and complex manufacturing process, and is not easy to popularize in low-cost wearable equipment.
In order to realize high-precision scanning, the scanning lines of the mutual capacitance type touch pad need to have higher density, and the number of corresponding channels is also increased sharply, so that the design complexity of the touch pad controller is further increased, and the cost of the mutual capacitance type touch pad is further increased. In addition, the longitudinal operation of the mutual-capacitance touch pad is limited in width size, at most three rows of scanning lines are arranged, and at most three points can only represent the longitudinal sliding of a finger, so that the touch precision is poor, and longitudinal misoperation is easily caused by point jumping touch.
The sensing electrode of the existing self-contained touch panel is generally composed of a plurality of wedge-shaped electrodes and is mainly used on a large-size touch panel or a touch screen. Fig. 1 is a schematic structural diagram of an induction electrode of a conventional self-contained touch panel, and as shown in fig. 1, when a finger touches a wider part and a narrower part of a wedge-shaped electrode 101 in an induction electrode 100, capacitance in the touch panel changes in a nonlinear manner, and in any microscopic state, two wedge-shaped electrodes 101 are required to work cooperatively to eliminate the nonlinearity, so that a correction algorithm of touch panel controller control software is relatively complex, and the number of wedge-shaped electrodes required by the touch panel in unit area is relatively large.
Disclosure of Invention
The invention provides a strip-shaped self-contained touch pad and a touch system, which are used for reducing the manufacturing cost of the strip-shaped touch pad in the conventional wearable equipment, improving the induction precision of the strip-shaped touch pad and reducing the complexity of the manufacturing process of the strip-shaped touch pad.
The invention provides a strip-shaped self-contained touch pad, which comprises: response electrode, PCB board and device routing layer, wherein, the response electrode is located the upper surface of PCB board, the device routing layer is located the lower surface of PCB board, be provided with touch pad controller and many first electric interconnection lines in the device routing layer, touch pad controller passes through first electric interconnection line connects the response electrode, does the response electrode provides the signal of telecommunication, and monitors the capacitance change amount of the electric capacity that each region that finger touched or was close to corresponds among the response electrode and the change order of its maximum capacitance change amount.
In one embodiment, the sensing electrode comprises: at least two rectangular metal electrodes arranged in at least one row; each metal electrode is connected with the touch panel controller through a first electric interconnection line; when a finger touches or approaches the metal electrode, the capacitance of the capacitor corresponding to the metal electrode changes.
In one embodiment, the spacing between adjacent metal electrodes is equal.
In one embodiment, the ratio of the length to the width of the metal electrodes is 7.2:4.3, and the distance is 0.2-0.8 mm.
In one embodiment, the number of the metal electrodes is 16, and the metal electrodes are arranged in two rows, so that the sensing electrodes are in a rectangular structure.
In one embodiment, the metal electrodes have a length and width dimension of 7.2mm × 4.3mm, the pitch is 0.4mm, and the PCB board has a length and width dimension of 63mm × 10 mm.
In one embodiment, the touch panel further comprises: and the second electric interconnection lines are led out from the touch panel controller, part of the second electric interconnection lines are connected with an application processor, the other part of the second electric interconnection lines are connected with a power management chip, and the application processor is connected with the power management chip.
In one embodiment, each of the second electrical interconnection lines is respectively connected with a metal finger, and a part of the second electrical interconnection lines are connected with the application processor through the metal fingers connected with the second electrical interconnection lines; another part of the second electric interconnection lines are connected with the power management chip through the metal fingers connected with the second electric interconnection lines.
The present invention also provides a touch system, comprising: the touch panel comprises a strip-shaped self-contained touch panel, an application processor and a power management chip; wherein, the bar is from holding formula touch pad includes: the device comprises an induction electrode, a PCB (printed Circuit Board) and a device wiring layer; the induction electrodes are arranged on the upper surface of the PCB, the device routing layer is arranged on the lower surface of the PCB, and a touch panel controller, a plurality of first electric interconnection lines and a plurality of second electric interconnection lines are arranged in the device routing layer; the touch panel controller is connected with the induction electrodes through the first electric interconnection lines, provides electric signals for the induction electrodes, and monitors capacitance change amounts of the capacitances corresponding to the areas touched or close to the fingers in the induction electrodes and the change sequence of the maximum capacitance change amount of the capacitance change amounts; the touch panel controller is connected with the application processor through a part of the second electric interconnection lines and is connected with the power management chip through another part of the second electric interconnection lines, and the application processor is connected with the power management chip; the application processor is used for controlling the power management chip to supply power to the touch panel controller, and the application processor is also used for initializing the touch panel controller.
In one embodiment, the sensing electrode comprises: the metal electrodes are arranged into at least one row, and the intervals between the adjacent metal electrodes are equal; each metal electrode is connected with the touch panel controller through a first electric interconnection line; when a finger touches or approaches the metal electrode, the capacitance of the capacitor corresponding to the metal electrode changes.
The touch pad of the embodiment of the invention can only adopt the PCB with the two-layer structure, thereby simplifying the manufacturing process of the PCB and obviously reducing the complexity and the manufacturing cost of the manufacturing process of the touch pad. Furthermore, rectangular metal electrodes are used as the induction electrodes of the touch pad in the embodiment of the invention, the capacitance corresponding to the metal electrodes changes in a nonlinear manner, high-density electrodes are not required to be arranged, high channel number is not required, the design complexity of the touch pad controller is obviously reduced, and the manufacturing cost of the strip-shaped touch pad is further reduced. The scheme of the invention realizes the gesture recognition of the self-induction capacitance type bar-shaped touch pad with extremely low cost, and has the advantages of low cost, high precision, easy production and the like. The touch system provided by the embodiment of the invention has lower total equipment cost and higher market competitiveness because of the low-cost strip-shaped self-contained touch panel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural diagram of a sensing electrode of a conventional self-contained touch panel;
FIG. 2 is a schematic structural diagram of a touch system according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a sensing electrode of a touch panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a device routing layer corresponding to the sensing electrode in FIG. 3 according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail with reference to fig. 2 to 4. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Fig. 2 is a schematic structural diagram of a touch system according to an embodiment of the invention. As shown in fig. 2, the Touch system includes an Application Processor (AP), a Power Management IC (PMIC), and a Touch Pad (TP). A Touch Pad Controller (TPC) is disposed on the Touch pad TP, and the TPC is connected to the sensing electrodes on the Touch pad TP.
The application processor AP is connected with the power management chip PMIC, and the power management chip PMIC is connected with the touch panel controller TPC so that the application processor AP enables the power management chip PMIC to supply power to the touch panel controller TPC through a control command; the application processor AP is electrically connected to the touchpad controller TPC via an I2C interface to initialize the touchpad controller TPC via an I2C interface and to enter a normal operating mode.
In a normal operating mode, the touch panel controller TPC provides an electrical signal such as a voltage to the sensing electrode of the touch panel TP, and sets an initial operating parameter, such as a voltage threshold, noise, and the like; after initialization is completed, the touch pad controller TPC enters a monitoring mode; in the monitoring mode, the touch panel controller TPC monitors or monitors a capacitance change condition of a capacitance corresponding to the sensing electrode in the touch panel TP, so as to determine a position where the finger touches or approaches and a touch gesture of the finger.
The touch panel TP of the embodiment of the present invention includes an inductive electrode, a PCB, and a device wiring layer. The induction electrode is arranged on the upper surface of the PCB, and the device wiring layer is arranged on the lower surface of the PCB. The device wiring layer is provided with a touch pad controller TPC and a plurality of electric interconnection lines connected with the touch pad controller TPC. The touch panel controller TPC is connected to the sensing electrode through one part of the electrical interconnection lines, connected to the application processor AP through the other part of the electrical interconnection lines, and connected to the power management chip PMIC through the remaining part of the electrical interconnection lines, that is, the touch panel controller TPC is respectively connected to the sensing electrode, the application processor AP, and the power management chip PMIC through different electrical interconnection lines. The touch panel controller provides an electric signal for the induction electrode, and monitors or monitors the capacitance change quantity of the capacitance corresponding to each area touched or approached by the finger in the induction electrode and the change sequence of the maximum capacitance change quantity. A ground plane may also be included in the touch pad and may be attached externally to the device trace layer to provide a capacitive counter electrode for the sense electrodes.
In the embodiment of the invention, the electrical interconnection line for connecting the application processor AP and the touch pad controller TPC may be connected to a metal finger at one end close to the application processor AP, so as to connect the application processor AP and the touch pad controller TPC simply and conveniently in a plug-in manner. Similarly, the electrical interconnection line connecting the power management chip PMIC and the touch panel controller TPC may be connected to a metal finger at an end close to the power management chip PMIC, so as to connect the power management chip PMIC and the touch panel controller TPC simply by plugging.
In the embodiment of the invention, the sensing electrodes and the device wiring layer are respectively arranged on two outer surfaces of the PCB, namely the upper surface and the lower surface, and the grounding layer can be externally attached to one side of the device wiring layer far away from the PCB. Therefore, the PCB only needs to be designed into a two-layer structure, and does not need to be designed into a four-layer structure like the PCB in the existing self-contained touch panel, so that the self-contained touch panel provided by the embodiment of the invention has a simpler manufacturing process.
The specially designed sensing electrode in the touch panel of the embodiment of the invention is formed by arranging a plurality of metal electrodes. The metal electrode is rectangular in shape and can be made of sheet metal. The metal electrodes are arranged in one or more rows for broadside, longitudinal sensing. When the metal electrodes are arranged in a plurality of rows, the number of the metal electrodes in each row may be the same or different.
Each metal electrode is connected with the touch panel controller through one electric interconnection line in the device wiring layer. When a finger touches or approaches the metal electrode, the capacitance of the capacitor corresponding to the metal electrode changes.
In different embodiments, each metal electrode in the sensing electrode can be a combination of various sizes and spacings.
In one embodiment, the adjacent metal electrodes (including the adjacent metal electrodes in the same row and the adjacent metal electrodes in different rows) have the same spacing, and the spacing can range from 0.2 mm to 0.8 mm.
In an embodiment, the adjacent metal electrodes are equally spaced, and all the metal electrodes may have the same length and width dimensions or a ratio thereof, and the length to width dimension ratio may be 7.2:4.3, which is not limited herein.
The total number of the metal electrodes can be selected in various ways, for example, 8, 16 or more, and the specific number can be determined according to the requirement of the strip-type self-capacitance touch pad.
The longitudinal direction of the induction electrode of the prior strip-shaped self-capacitance touch pad is provided with three rows at most, while the longitudinal induction width of the touch pad can be adjusted by arranging a plurality of rows in the longitudinal direction or adjusting the longitudinal width of the metal electrode, so that the longitudinal arrangement of the induction electrode is more flexible, and the strip-shaped self-capacitance touch pad can meet the diversified requirements.
In one embodiment, when the rectangular metal electrodes are arranged in a plurality of rows, each row of metal electrodes may have the same number, and the adjacent metal electrodes have the same spacing, so that the entire sensing electrode has a rectangular structure. The number, size, arrangement, etc. of the metal electrodes can be adjusted in different degrees, which can be determined according to the needs of the touch system.
Of course, in order to meet the shape requirement of the strip-shaped self-capacitance type touch pad, or in order to achieve other purposes, part of the metal electrodes in the sensing electrodes can be in other shapes, such as triangles or parallelograms. In other words, the sensing electrodes are formed by arranging metal electrodes with different shapes.
In the embodiment of the invention, the relative position of the finger and each metal electrode determines the capacitance change amount of the capacitance corresponding to the metal electrode. When a finger touches or approaches a certain metal electrode, the capacitance of the capacitor formed by each metal electrode and the grounding layer changes, and the capacitance change amount of the metal electrode closer to the touched or approached metal electrode is larger. The application processor can obtain the position touched or approached by the finger in the induction electrode and the touch gesture of the finger by analyzing the change quantity of the capacitance corresponding to each metal electrode and the change sequence of the maximum capacitance change quantity recorded by the touch panel controller.
The advantages of the bar-type self-contained touch pad of the present invention will be described in one embodiment. In this embodiment, the sensing electrodes and the device routing layers are respectively disposed on the upper surface and the lower surface of the PCB. The metal electrodes in the sensing electrodes have the same shape and size and are aligned in a rectangular shape. The length-width size ratio of the metal electrodes is 7.2:4.3, the distance between every two adjacent metal electrodes is changed within the range of 0.2-0.8 mm, and the touch pad has a size matched with that of the sensing electrodes. In order to provide the touch panel with greater touch sensitivity and sensing accuracy, it is preferable that, in the following embodiment, the length and width dimensions of the PCB board are 63mm × 10mm, the length and width dimensions of the metal electrodes are 7.2mm × 4.3mm, and the interval between adjacent metal electrodes is 0.4 mm.
Fig. 3 is a schematic structural diagram of a sensing electrode of a touch panel according to an embodiment of the present invention. As shown in fig. 3, the sensing electrode 200 disposed on the upper surface of the PCB includes 16 rectangular metal electrodes 201, each metal electrode 201 has the same length and width dimensions, and the 16 metal electrodes 201 are arranged in two rows, so that the sensing electrode 200 is in a long rectangular shape.
FIG. 4 is a schematic diagram of a device routing layer corresponding to the sensing electrode in FIG. 3 according to an embodiment of the present invention. As shown in fig. 4, the device trace layer 300 disposed on the lower surface of the PCB includes electrical interconnection lines 302 and a touch panel controller 301, wherein 16 electrical interconnection lines 302 respectively electrically connect 16 metal electrodes 201 to the touch panel controller 301, and 8 electrical interconnection lines 302 are led out from the touch panel controller 301 and respectively extend to 8 metal fingers 303 disposed on one side of the device trace layer 300, wherein at least 4 metal fingers 303 are used for accessing an application processor (I2C interface connectable to the application processor AP), and at least 2 metal fingers 303 are used for accessing a power management chip. In other embodiments, the number of electrical interconnect lines 302 and metal fingers 303 may be adjusted, for example, the number of metal fingers is at least 6.
Those skilled in the art should understand that the above-mentioned electrical interconnection lines, metal fingers, the number, kinds, and positions of the devices are not limited to the description of the above embodiments.
The sensing electrodes of the touch panel in the embodiment of the invention can be only provided with a small number of metal electrodes, so that a large number of routing wires can be saved, and further, a large number of routing space can be saved.
For the strip-type self-capacitance touch panel comprising the sensing electrodes shown in fig. 3 and the device wiring layer shown in fig. 4, when the touch panel controller is in a monitoring mode, the application processor can obtain the touch position and the touch gesture of the finger by receiving and analyzing the capacitance change condition in the touch panel monitored by the touch panel controller.
Specifically, for example, when a finger touches or approaches one metal electrode 201, for example, the finger touches the metal electrode No. 3 (number 3 in fig. 3) in fig. 3, the capacitance of the capacitance formed by 16 metal electrodes 201 and the ground layer changes, wherein the capacitance change of the metal electrode No. 3 is the largest, and the capacitance change of the metal electrode No. 16 farthest from the metal electrode No. 3 is the smallest, and the application processor receives the above capacitance change monitored by the touch panel controller, so that it can analyze that the finger touches the metal electrode No. 3.
For another example, when a finger touches or approaches the plurality of metal electrodes 201 simultaneously, for example, the finger touches the number 3 and the number 4 metal electrodes in fig. 3 simultaneously, the contact areas of the finger and the number 3 and the number 4 metal electrodes are different, and the capacitance change amounts of the capacitances corresponding to the number 3 and the number 4 metal electrodes are also different, for example, the capacitance change amount of the number 3 metal electrode is larger, and the processor is applied to determine the position where the finger touches the number 3 metal electrode and approaches the number 4 metal electrode by analyzing the capacitance change amount.
For another example, when a finger touches or approaches the sensing electrode 200 and slides a distance, for example, the finger slides along a straight line from the metal electrode No. 3 to the metal electrode No. 7 in fig. 3, and the metal electrodes No. 3, No. 5, and No. 7 have the maximum capacitance change in sequence, the application processor can know that the finger slides from the metal electrode No. 3 to the metal electrode No. 7 through the metal electrode No. 5 by analyzing the change sequence of the maximum capacitance change. Besides, other various touch gestures, such as double-click, long-press, etc., can also be obtained through analyzing the change order of the capacitance change amount and the maximum capacitance change amount of the metal electrode monitored by the touch panel controller.
The touch pad provided by the embodiment of the invention only needs the PCB with the two-layer structure, so that the manufacturing cost of the touch pad is obviously reduced, and the touch pad is suitable for the low-cost requirement of wearable touch equipment. Furthermore, the touch panel of the embodiment of the invention comprises the specially designed sensing electrodes, when a finger touches or approaches different positions of the rectangular metal electrodes, the capacitance corresponding to the metal electrodes has the same capacitance change amount and the capacitance linearly changes, so that the design complexity of the touch panel controller can be simplified, the manufacturing cost of the touch panel and the technical requirements of the touch panel controller can be reduced, and the sensing electrodes are suitable for various self-capacitance type touch panels, especially for the strip-shaped self-capacitance type touch panel, and the strip-shaped self-capacitance type touch panel can have various transverse and longitudinal dimensions. In addition, the sensing electrodes in the conventional strip-shaped mutual capacitance touch panel are formed by intersections of row and column scanning lines, and the sensing electrodes in the embodiment of the invention are formed by metal electrodes with a surface structure, so that the embodiment of the invention can increase the contact area between a finger and the sensing electrodes, thereby remarkably increasing the touch sensitivity and precision of the touch panel.
The touch system of the embodiment of the invention can be various wearable touch devices, and has lower total cost of the device and more market competitiveness because of the low-cost strip-shaped self-contained touch pad.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A bar-shaped self-contained touch pad, the touch pad comprising: response electrode, PCB board and device routing layer, wherein, the response electrode is located the upper surface of PCB board, the device routing layer is located the lower surface of PCB board, be provided with touch pad controller and many first electric interconnection lines in the device routing layer, touch pad controller passes through first electric interconnection line connects the response electrode, does the response electrode provides the signal of telecommunication, and monitors the capacitance change amount of the electric capacity that each region that finger touched or was close to corresponds among the response electrode and the change order of its maximum capacitance change amount.
2. The strip-form, self-contained touch pad of claim 1, wherein the sense electrodes comprise: at least two rectangular metal electrodes arranged in at least one row; each metal electrode is connected with the touch panel controller through a first electric interconnection line; when a finger touches or approaches the metal electrode, the capacitance of the capacitor corresponding to the metal electrode changes.
3. The strip-form, self-contained touch panel of claim 2, wherein adjacent metal electrodes are equally spaced.
4. The strip-shaped self-contained touch panel according to claim 3, wherein the ratio of the length to the width of the metal electrodes is 7.2:4.3, and the pitch is 0.2 to 0.8 mm.
5. The strip-form self-contained touch panel of claim 4, wherein the number of said metal electrodes is 16, arranged in two rows, such that said sensing electrodes are in a rectangular configuration.
6. The strip-form, self-contained touch panel of claim 5, wherein the metal electrodes have a length and width dimension of 7.2mm x 4.3mm, the pitch is 0.4mm, and the PCB has a length and width dimension of 63mm x 10 mm.
7. The bar-shaped self-contained touch pad of any of claims 1 to 6, further comprising: and the second electric interconnection lines are led out from the touch panel controller, part of the second electric interconnection lines are connected with an application processor, the other part of the second electric interconnection lines are connected with a power management chip, and the application processor is connected with the power management chip.
8. The touch pad of claim 7, wherein each of said second electrical interconnect lines is connected to a respective metal finger, and wherein a portion of said second electrical interconnect lines are connected to said application processor through said metal finger connected thereto; another part of the second electric interconnection lines are connected with the power management chip through the metal fingers connected with the second electric interconnection lines.
9. A touch system, comprising: the touch panel comprises a strip-shaped self-contained touch panel, an application processor and a power management chip; wherein,
the bar-shaped self-contained touch panel includes: the device comprises an induction electrode, a PCB (printed Circuit Board) and a device wiring layer; the induction electrodes are arranged on the upper surface of the PCB, the device routing layer is arranged on the lower surface of the PCB, and a touch panel controller, a plurality of first electric interconnection lines and a plurality of second electric interconnection lines are arranged in the device routing layer; the touch panel controller is connected with the induction electrodes through the first electric interconnection lines, provides electric signals for the induction electrodes, and monitors capacitance change amounts of the capacitances corresponding to the areas touched or close to the fingers in the induction electrodes and the change sequence of the maximum capacitance change amount of the capacitance change amounts;
the touch panel controller is connected with the application processor through a part of the second electric interconnection lines and is connected with the power management chip through another part of the second electric interconnection lines, and the application processor is connected with the power management chip; the application processor is used for controlling the power management chip to supply power to the touch panel controller, and the application processor is also used for initializing the touch panel controller.
10. The touch system of claim 9, wherein the sensing electrode comprises: the metal electrodes are arranged into at least one row, and the intervals between the adjacent metal electrodes are equal; each metal electrode is connected with the touch panel controller through a first electric interconnection line; when a finger touches or approaches the metal electrode, the capacitance of the capacitor corresponding to the metal electrode changes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510148576.7A CN106155430A (en) | 2015-03-31 | 2015-03-31 | Bar shaped self-tolerant touch pad and touch-control system |
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| CN201510148576.7A CN106155430A (en) | 2015-03-31 | 2015-03-31 | Bar shaped self-tolerant touch pad and touch-control system |
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| CN108768373A (en) * | 2018-07-03 | 2018-11-06 | 珠海进田电子科技有限公司 | A kind of novel line control machine of gesture control |
| WO2020056600A1 (en) * | 2018-09-18 | 2020-03-26 | 深圳市汇顶科技股份有限公司 | Touch assembly, apparatus, and touch method |
| US11334204B2 (en) | 2018-09-18 | 2022-05-17 | Shenzhen GOODIX Technology Co., Ltd. | Touch component, touch apparatus, and touch-control method |
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