WO2015039363A1

WO2015039363A1 - Oversize multipoint touch-control induction unit and identification method therefor

Info

Publication number: WO2015039363A1
Application number: PCT/CN2013/084548
Authority: WO
Inventors: 刘泽江
Original assignee: 苏州泛普纳米科技有限公司
Priority date: 2013-09-18
Filing date: 2013-09-27
Publication date: 2015-03-26
Also published as: CN103488340B; CN103488340A

Abstract

Disclosed are an oversize multipoint touch-control induction unit and an identification method therefor. Based on a multipoint identification method, the oversize multipoint touch-control induction unit comprises a grid electromagnetic induction layer, two layers of surface substrates between which the grid electromagnetic induction layer is embedded, and an induction signal collection control integrated circuit communicatively connected to the grid electromagnetic induction layer, wherein the induction signal collection control integrated circuit is communicatively connected to a calculation control unit having a touch-control drive program. The present invention realizes the application of multipoint touch control in the technical field of oversize touch control.

Description

TECHNICAL FIELD The present invention relates to the field of touch technologies, and in particular, to an oversized multi-touch sensing unit and a method for identifying the same. BACKGROUND OF THE INVENTION With the increasing application of touch technology, its application range rapidly expands from the mass consumer electronics field such as mobile phones, PAD, GPS (global navigation system), MP3, etc. to smart homes (such as touch TV, touch refrigerator, touch Kitchen, touch coffee table, etc.), interactive digital signage, interactive exhibition display, interactive teaching and other fields. The simple, convenient and user-friendly features of touch control have become the best interface for human-computer interaction and are rapidly spreading. At present, in the field of touch technology, there are infrared, surface acoustic wave, surface capacitance, resistance, optical and other touch technologies. For medium and large size screen design requirements (3.5~7 inches for small size, 10~15 inches for medium) Large size, 17~22 inches for large size, 30 inches or larger for large size), in order to meet the integrated touch man-machine interface application, you must choose a touch sensing technology solution for larger screens.

First of all, for the resistive touch sensing technology used in the early stage, although it has advantages in material and technology cost, it can also adapt to the touch technology integration requirements of small screen to medium and large size screens, but in fact resistive touch There are still inherent limitations in materials, structure and technology. For example, the resistive touch sensing film structure will cause the screen transmittance to be affected, and the mechanical structure of the film pressure sensing will cause the service life to be touched by a large amount. It is greatly affected, and it is easy to expose technical application defects on devices that frequently use the type.

Secondly, for the capacitive touch technology, since the principle is that the operator's finger touches the screen, it affects the weak change of the capacitance state of the overall sensing layer, and then the contact position is analyzed through the touch IC. Initial development The touch design of the small screen can meet the needs of product development. However, if the touch technology integration of the medium and large size screens is integrated, the G/G (Glass to Glass) structure of the large screen protection glass is difficult to fit. The /G structural problem causes the panel strength of large-size screens to be affected. Even if the thickness of the G/G scheme does not affect the design requirements of medium- and large-size screen products, the yield of the G/G touch scheme is actually It affects the cost of the end product, which affects the cost of the medium and large size touch screen using capacitive touch technology. Therefore, the capacitive touch technology solution encounters bottlenecks in the development of large-scale.

Touch applications originally used in electronic whiteboards and public displays are also used on some branded computers. For example, in an all-in-one product that exceeds 20 inches, an optical touch solution is used, and in a larger size design, an acoustic sensing touch solution is used. Regardless of whether it is an optical touch solution or an acoustic sensing touch solution, the accuracy of the tracking contact has a certain degree of error, mainly because the optical sensing type is susceptible to light, and the acoustic sensing type The waterproof capability is weak, which results in contact accuracy that is not as accurate as resistive or capacitive touch solutions. In addition, the touch-and-interface feedback program of the human-machine interface consumes a little longer than the resistance or capacitive touch. The accuracy and system feedback speed are limited, and the benefits of large-screen applications are also affected. In addition to the accuracy and system feedback speed issues, most users are familiar with the multi-touch usage habits of small screens. In the large-screen touch products, if optical or sonic touch is used, in multi-touch Application support will also be unable to obtain a better multi-touch experience due to technical architecture bottlenecks, and a low-frequency low-sonic touch solution will also make a click when the user is hand-sliding, affecting the user. Touch experience.

Finally, the infrared touch screen is mounted on the front of the display with a circuit board outer frame. The circuit board arranges the infrared transmitting tube and the infrared receiving tube on the four sides of the screen, and one-to-one correspondingly forms an infrared matrix which is horizontally and vertically crossed. When the user touches the screen, the finger blocks the two infrared rays passing through the position, so that the position of the touch point on the screen can be determined. Currently, infrared touch screens are mostly used in large sizes, but they must be installed. On the outside of the display device, the appearance is poor. In outdoor applications, shortcomings such as anti-explosion, low water resistance and low service life also limit its application.

Known multi-touch panels (e.g., capacitors, resistors) are transparent substrates with an inductive sensing layer on the surface that are input and controlled by the user using a finger or pen tip to contact the generated signal. The inside is a multi-touch sensing detection layer composed of two layers of high transparent glass/film package ITO (indium tin oxide). The user touches the sensing layer corresponding to the relevant position on the display screen by finger touch. Touch operation. Since the manufacturing process of the multi-touch sensing layer is complicated, and indium tin oxide is a scarce resource, the price is high and the supply is limited, and the multi-touch sensing layer is mostly applied to small and medium-sized screens. 3.5~7 inches for small size, 10~15 inches for medium and large size, 17~22 inches for large size, and 30 inches for oversized size). On the other hand, the penetration capability of the above-mentioned small and medium-sized multi-touch sensing detection layer is limited to 3 mm. Due to the limitations of the process and technology, the surface touch is not possible, so the scope of application is very limited. On the other hand, in the medium and large size touch schemes, the touch accuracy is poor, there are delays and multi-point technical framework bottlenecks; these all restrict its widespread popularity.

There is also a touch film for packaging an ultra-fine wire grid electromagnetic induction layer and a manufacturing method thereof, as described in Patent Nos. 200910181699.5 and 201210236716.2, which are characterized in that the built-in ultra-fine wire has a low cost and is widely used in an oversized screen. However, because the large-size touch is limited to single-point, two-touch, it is impossible for multiple people to interact with each other on a large touch screen.

In view of the deficiencies and shortcomings of the above technical fields, it is urgent to develop a multi-touch multi-touch sensing unit that can be applied to an ultra-large size to suit the market demand and broaden the application range of the touch field. SUMMARY OF THE INVENTION In view of the above drawbacks of the prior art, an object of the present invention is to provide an ultra-large-sized multi-touch sensing unit and a recognition method thereof. The object of the invention will be achieved by the following technical solutions:

An oversized multi-touch sensing unit comprises a grid electromagnetic induction layer, two layers of surface base layers embedded with the grid electromagnetic induction layer, and an inductive signal acquisition control connected to the grid electromagnetic induction layer The integrated circuit, the sensing signal acquisition control integrated circuit is in communication with a computing control unit having a touch driver.

Preferably, in the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the grid electromagnetic induction layer comprises a disc-interlaced warp and weft network line which is wound by an ultra-fine wire and is respectively wound along an X-axis and a Y-axis. The ultrafine wires are insulated from each other at the intersection.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the grid electromagnetic induction layer is embedded in two surface base layers by printing and/or silk screen printing and/or embossing pressing. .

Preferably, in the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the grid electromagnetic induction layer is two or more layers of the warp and weft network lines, and each of the layers of the warp and weft grid lines is coated with an insulating layer.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the ultra-fine wire comprises a nano wire and/or a metal wire.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the surface base layer is a flexible transparent film, a smooth wallpaper or carpet, a transparent glass or an acrylic plate; the surface base layer has a thickness of 10 mm or less; The surface base layer is a planar or curved structure.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the ultra-fine wires of the grid electromagnetic induction layer are collected and passed through a data stream output interface and a data stream input interface and the sensing signal acquisition control The integrated circuit is connected; the data stream input interface has independent X-axis and Y-axis ultra-fine wire signal output interfaces; the data stream output interface and the data stream input interface are flexible printed circuits, electrodes or pins. Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the sensing signal acquisition control integrated circuit is an integrated circuit or integrated circuit and printing with multi-touch signal acquisition, processing and computer standard output interface functions. a circuit board combined with the circuit; the sensing signal acquisition control integrated circuit comprises:

The power conversion module converts the input voltage of the communication interface into a voltage required for the analog circuit and the digital circuit in the acquisition system, and isolates the input power source from the output power source to prevent the external power source from generating interference through the communication interface;

The transmitting circuit module is configured to generate an excitation signal required for capacitance detection, sequentially perform charge and discharge scanning on the X-axis and Y-axis intersections on the ultra-fine wire, and transmit the scanned matrix signal to the CPU processing module, in the CPU Under the control of the processing module, the matrix signals received by the different receiving channels are sent to the receiving circuit module in time sharing;

The receiving circuit module amplifies, rectifies, and filters the received matrix signal, and finally converts the matrix signal into a data signal, and sends it to the CPU processing module for processing;

And a CPU processing module, controlling the operation of the sensing signal acquisition control integrated circuit, and performing digital operation and processing on the final acquisition signal, and transmitting to the calculation control unit for multi-point identification processing.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the touch driver includes a DSP data processing program for performing multi-point recognition, and touch sensitivity of the touch sensing unit The threshold is calibrated, and the ultra-fine wire is simultaneously detected for the degree of disconnection and electromagnetic interference.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the touch driving program is installed in an operating system of the computing control unit, or is installed in a separate hardware driver for installation and debugging.

Preferably, the above-mentioned ultra-large-size multi-touch sensing unit, wherein: the calculation control sheet The operating system of the meta includes Linux, Windows or Android.

The method for identifying the super-large-size multi-touch sensing unit includes the following steps: Step 1: converting the input voltage of the communication interface to the analog signal and the digital circuit in the integrated circuit through the power conversion module The required voltage, and isolate the input power and output power to prevent external power supply from interfering through the communication interface;

Step 2: The excitation circuit sends an excitation signal, and sequentially performs charging and discharging scanning on the intersections of the ultra-fine wires on the X-axis and the Y-axis, and transmits the scanned matrix signals to the CPU processing module;

Step 3: under the control of the CPU processing module, time-sharing the matrix signals received by the different receiving channels to the receiving circuit module;

Step 4: The receiving circuit module amplifies, rectifies and filters the received matrix signal, and finally converts the matrix signal into a data signal, and sends it to the CPU processing module for processing to form a regular matrix data stream, which is transmitted to the calculation by the communication interface output. The control unit has a multi-touch operation on the grid electromagnetic induction base layer, and the generated data stream information is input to the sensing signal acquisition control integrated circuit through the data stream output interface and the data stream input interface, and the sensing signal acquisition control integrated circuit pairs The data stream information is collected and processed to form an initial matrix signal output through the communication interface;

Step 6: The initial matrix signal is input through the input interface of the calculation control unit, and the data processing is performed by the DSP data processing program to obtain the actual position of the multi-touch, thereby identifying the multi-touch operation.

Preferably, the method for identifying a super-large-scale multi-touch sensing unit is as follows, wherein: the DSP data processing program comprises a center of gravity algorithm.

The outstanding effects of the present invention are: 1. A method for identifying a large-sized multi-touch sensing unit and an oversized touch sensing unit are provided, which realizes the application of multi-touch in the field of ultra-large touch technology;

2. The preparation method of the large-size multi-touch sensing unit adopts the flow-through operation, the raw material is easily obtained, and the cost is easy to control;

3. The software based on multi-point algorithm can be manually installed to the computing control unit, or integrated in a hardware driver, plug and play, can be adapted to a variety of operating systems, and has a humanized visual interface;

4. The preparation of the ultra-large-size multi-touch sensing unit is rich in raw materials and small in amount, which can replace the traditional ITO technology, avoid the use of scarce materials such as indium tin oxide, and has no pollution;

5. The ultra-large-size multi-touch sensing unit has a penetration capacity of more than 3mm and reaches 10mm, which enhances the anti-riot and waterproof capabilities, and expands its applications in military, industrial, commercial and other fields requiring anti-riot and waterproof functions;

6. It can realize the application of large-size multi-touch sensing unit in the field of curved touch.

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solutions of the present invention can be more easily understood and understood. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of a multi-touch sensing unit according to an embodiment of the present invention;

2 is a schematic structural diagram of an inductive signal acquisition and control integrated circuit according to an embodiment of the present invention; FIG. 3 is a flowchart of a system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of detection distribution of a grid electromagnetic induction layer according to an embodiment of the present invention. Concrete embodiment An ultra-large-size multi-touch sensing unit of the present embodiment, as shown in FIG. 1 to FIG. 4, includes a grid electromagnetic induction layer 3, and two layers of surface base layers embedded with the grid electromagnetic induction layer 3 (not shown) The super-fine wires of the grid electromagnetic induction layer 3 are collected and connected to the inductive signal acquisition control integrated circuit 7 through the data stream output interface 4 and the data stream input interface 5, and the data stream input interface 5 has independent X-axis and Y-axis. Ultra-fine wire signal output interface; data stream output interface 4 and data stream input interface 5 are flexible printed circuits, electrodes or pins. The sensing signal acquisition control integrated circuit 7 is connected via a communication interface 6 to a computing control unit 9 having a touch driver.

The grid electromagnetic induction layer 3 comprises a disc-interlaced warp and weft network line which is formed by winding ultra-fine wires along the X-axis and the Y-axis respectively. The ultra-fine wires are insulated from each other at the intersection, and the space surrounded by the intersections constitutes a space. A sensing unit. Optionally, the grid electromagnetic induction layer is embedded in the two surface base layers by printing and/or silk screen printing and/or embossing, and the grid electromagnetic induction layer 3 is two or more layers. The warp and weft network line, each of the warp and weft grid lines is coated with an insulating layer, and the sensing units on each layer of the warp and weft grid lines are alternately arranged with each other in a regular honeycomb shape, a rectangular shape or a diamond shape, and the spacing between the sensing units is the same, or Not the same. Ultrafine wires include nanowires and/or metal wires.

The surface base layer is a flexible transparent film, a smooth wallpaper or carpet, a transparent glass or an acrylic sheet; the surface of the surface layer has a thickness of 10 mm or less; and the surface base layer has a flat or curved structure.

The inductive signal acquisition control integrated circuit 7 is an integrated circuit or integrated circuit integrated circuit with a multi-touch signal acquisition, processing and computer standard output interface function; the inductive signal acquisition control integrated circuit comprises:

The power conversion module converts the input voltage of the communication interface 6 into a voltage required for the analog circuit and the digital circuit in the acquisition system, and isolates the input power source from the output power source to prevent the external power source from generating interference through the communication interface; The transmitting circuit module is configured to generate an excitation signal required for capacitance detection, sequentially perform charge and discharge scanning on the X-axis and Y-axis intersections on the ultra-fine wire, and transmit the scanned matrix signal to the CPU processing module, in the CPU Under the control of the processing module, the matrix signals received by the different receiving channels are sent to the receiving circuit module in time sharing;

And the CPU processing module controls the operation of the sensing signal acquisition control integrated circuit, and finally collects the signals for digital operation and processing, and transmits the signals to the calculation control unit 9 for multi-point recognition processing.

The touch driver includes a DSP data processing program for performing multi-point recognition, and debugging calibration of the touch sensitivity and threshold of the touch sensing unit, and detecting whether the ultra-fine wire has wire breakage and electromagnetic interference. . The touch driver is installed in the operating system of the computing control unit 9, or in a separate hardware installation that is free of installation and commissioning. The operating system of the compute control unit 9 includes Linux, Windows or Android.

A method for identifying an oversized multi-touch sensing unit includes the following steps:

Step 1: The input voltage of the communication interface 6 is converted into a voltage required by the analog circuit and the digital circuit in the induction signal acquisition control integrated circuit through the power conversion module, and the input power source and the output power source are isolated to prevent the external power source from communicating. The interface generates interference;

Step 2: The excitation circuit sends an excitation signal, and sequentially performs charging and discharging scanning on the intersections of the ultra-fine wires on the X-axis and the Y-axis, respectively, and transmits the scanned matrix signals to the CPU processing module; As shown in FIG. 4, the transmission circuit module sends an excitation signal to XI, and sequentially scans the data signals of the intersection points of XI and Y1, the data signals of the intersection points of XI and Y2, and the data signals of the intersection points of XI and Y3 until scanning. Data signal to the intersection of XI and Yn, complete the whole Data acquisition on the XI axis. Data acquisition on the X2, X3, and X4 axes is completed in the same scan mode up to the Xm axis. Due to the presence of the coupling capacitor, a capacitor is formed at the intersection of each of the X-axis and the Y-axis. Assuming that a sine-wave excitation signal of amplitude and phase is transmitted in time division on the XI axis, then in XI The axis and the Y1 axis, Y2 axis, Y3 axis... The intersection of the Yn axis generates an induced signal whose amplitude and phase are related to the frequency of the excitation signal and the coupling capacitance. At this time, the sensing signal acquisition control IC collects XI. The capacitance value of the intersection of the axis with the Y1 axis, the Υ2 axis, the Υ3 axis, the ... Yn axis, respectively, is called the maximum value Vmax;

Step 4: The receiving circuit module amplifies, rectifies and filters the received matrix signal, and finally converts the matrix signal into a data signal, and sends it to the CPU processing module for processing, forming a regular matrix data stream, and transmitting the output to the communication interface 6 to The computing control unit 9; Step 5, the human hand 2 touches the multi-touch grid electromagnetic induction base layer 3 for multi-touch operation, and the generated related data stream information is input to the sensing through the data stream output interface 4 and the data stream input interface 5 The signal acquisition control integrated circuit 7, the sensing signal acquisition control integrated circuit 7 collects and processes the data stream information to form an initial matrix signal output through the communication interface 6; as shown in FIG. 4, when the human hand 2 touches the touch sensing unit When the point M (or more points, here is an example), since the human body is a static-sensing conductor, a sensing area 1 is formed on the surface of the touch sensing unit (greater than or equal to the human finger and the touch sensing unit) The contact area of the surface), the sensing area 1 covers the intersection of 6 X-axis and Y-axis Y2 comprises a shaft axis of the intersection X2 Ml, X3 axis and the Y2 axis and the axis intersection M2 ...... X4

The intersection of the Y3 axis is M6. At this time, the capacitance value of the six intersections of the M1, M2, M3, M4, M5, and M6 collected by the sensing signal acquisition control integrated circuit will be reduced. For example, M1 is assumed, and the capacitance value of the intersection is assumed to be reduced. As small as Nl, the data information of this point can be obtained by the inversion algorithm as Vmax-Nl. Similarly, the data information of the other five intersections is obtained to form an initial matrix signal.

Step 6: The initial matrix signal is input through the input interface 8 of the calculation control unit 9, and the data processing is performed by the DSP data processing program (the DSP data processing program may be integrated with the calculation control unit 9 or may be separate from the calculation control unit 9). The DSP data processing program performs an initial matrix signal, that is, data information Vmax-N1 of each intersection, to perform a center of gravity algorithm, and calculates actual position information M of the touch. The touch driver converts the position information M into a signal that can be recognized by the calculation control unit 9 and transmits it to the calculation control unit 9, thereby obtaining a touch operation of the human hand touch at the point.

When there are multiple hands on the touch operation, as shown in Figure 1, the human hand 10, the human hand 1 1. Repeat the above identification method, and is not limited by the number of touch points.

The present invention has various embodiments, and all technical solutions formed by equivalent transformation or equivalent transformation are within the scope of the present invention.

Claims

Rights request

An ultra-large-sized multi-touch sensing unit, comprising: a grid electromagnetic induction layer, two surface base layers embedded with the grid electromagnetic induction layer, and a grid electromagnetic induction layer The connected sensing signal acquisition control integrated circuit is communicatively coupled to a computing control unit having a touch driver.

2. The ultra-large-size multi-touch sensing unit according to claim 1, wherein: the grid electromagnetic induction layer comprises a disk that is wound by an ultra-fine wire along an X-axis and a Y-axis, respectively. Mis-interlaced warp and weft wires, the ultra-fine wires are insulated from each other at the intersection.

3. The ultra-large-size multi-touch sensing unit according to claim 2, wherein: the grid electromagnetic induction layer is embedded in the pressing manner by printing and/or silk screen printing and/or embossing. In the two-layer surface base layer.

4. The ultra-large-size multi-touch sensing unit according to claim 2, wherein: the grid electromagnetic induction layer is two or more layers of warp and weft network lines, and each layer of the warp and weft network lines is coated. Covered with insulation.

5. The ultra-large-size multi-touch sensing unit according to claim 2, wherein: the ultra-fine wire comprises a nano wire and/or a metal wire.

6 . The oversized multi-touch sensing unit according to claim 1 , wherein: the surface base layer is a flexible transparent film, a smooth wallpaper or carpet, a transparent glass or an acrylic plate; The thickness is less than or equal to 10 mm; the surface base layer is a planar or curved structure.

7. The ultra-large-size multi-touch sensing unit according to claim 2, wherein: the ultra-fine wires of the grid electromagnetic induction layer are collected and passed through a data stream output interface and a data stream input interface. Connected to the sensing signal acquisition control integrated circuit; the data stream input interface has independent X-axis and Y-axis ultra-fine wire signal output interfaces; the data stream output interface and the data stream input interface are flexible printed circuits, Electrode or pin.

8. The ultra-large-size multi-touch sensing unit according to claim 1, wherein: the sensing signal acquisition control integrated circuit is integrated with multi-touch signal acquisition, processing, and computer standard output interface functions. a circuit board in combination with a circuit or an integrated circuit and a printed circuit; the sensing signal acquisition control integrated circuit comprises:

The transmitting circuit module is configured to generate an excitation signal required for capacitance detection, sequentially perform charge and discharge scanning on the X-axis and Y-axis intersections on the ultra-fine wire, and transmit the scanned matrix signal to the CPU processing mode. Under the control of the CPU processing module, time-sharing sends matrix signals received by different receiving channels to the receiving circuit module;

The receiving circuit module amplifies, rectifies and filters the received matrix signal, and finally converts the matrix signal into a data signal, and sends it to the CPU processing module for processing;

And a CPU processing module, controlling the operation of the sensing signal acquisition control integrated circuit, and finally collecting signals for digital operation and processing, and transmitting to the calculation control unit for multi-point identification processing.

9. The ultra-large-size multi-touch sensing unit according to claim 1, wherein: the touch driver includes a DSP data processing program for performing multi-point recognition, and the touch sensing The unit's touch sensitivity and threshold are calibrated, and the ultra-fine wire is detected for disconnection and electromagnetic interference.

10. The ultra-large-size multi-touch sensing unit according to claim 9, wherein: the touch driver is installed in an operating system of the computing control unit, or is installed in an independent installation-free debugging hardware. The operating system of the computing control unit includes Linux, Windows or Android.

The method for identifying an ultra-large-size multi-touch sensing unit according to any one of claims 1 to 10, comprising the steps of:

Step 1: The input voltage of the communication interface is converted into a voltage required by the analog circuit and the digital circuit in the induction signal acquisition control integrated circuit through the power conversion module, and the input power source and the output power source are isolated to prevent the external power source from passing through the communication interface. Causing interference;

Step 2: The excitation circuit sends an excitation signal, and sequentially performs charging and discharging scanning on the intersections of the ultra-fine wires on the X-axis and the Y-axis, respectively, and transmits the scanned matrix signals to the CPU processing module; Step 3: Under the control of the CPU processing module, the matrix signals received by the different receiving channels are time-sharing sent to the receiving circuit module;

Step 4: The receiving circuit module amplifies, rectifies and filters the received matrix signal, and finally converts the matrix signal into a data signal, and sends it to the CPU processing module for processing to form a regular matrix data stream, which is transmitted to the calculation by the communication interface output. control unit;

Step 5: Perform multi-touch operation on the grid electromagnetic induction base layer, and generate generated data stream information to be input to the sensing signal acquisition control integrated circuit through the data stream output interface and the data stream input interface, and the sensing signal acquisition control integrated circuit pairs the data stream information. Performing acquisition and processing to form an initial matrix signal output through a communication interface;

The method for identifying an oversized multi-touch sensing unit according to claim 11, wherein: the DSP data processing program comprises a center of gravity algorithm.