CN111966250B - Mouse with mouse body - Google Patents

Mouse with mouse body Download PDF

Info

Publication number
CN111966250B
CN111966250B CN202010721591.7A CN202010721591A CN111966250B CN 111966250 B CN111966250 B CN 111966250B CN 202010721591 A CN202010721591 A CN 202010721591A CN 111966250 B CN111966250 B CN 111966250B
Authority
CN
China
Prior art keywords
sensing
capacitive touch
mouse
detection
touch panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010721591.7A
Other languages
Chinese (zh)
Other versions
CN111966250A (en
Inventor
陈勇维
王彦章
张彦闵
陈信嘉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pixart Imaging Inc
Original Assignee
Pixart Imaging Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pixart Imaging Inc filed Critical Pixart Imaging Inc
Priority to CN202010721591.7A priority Critical patent/CN111966250B/en
Publication of CN111966250A publication Critical patent/CN111966250A/en
Application granted granted Critical
Publication of CN111966250B publication Critical patent/CN111966250B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • H04B5/70—

Abstract

The mouse comprises a plurality of sensing conductors, at least one of which is used as a clock frequency bit, and one of which is used as a positioning bit for identifying the placement direction of the mouse; and a controller coupled to the plurality of sensing conductors for modulating the potentials of the plurality of sensing conductors as a configuration feature to determine whether the mouse belongs to a specific object.

Description

Mouse with mouse body
The present application is a divisional application of a chinese invention patent application with application number 201610404744.9, application date 2016, 06, 08, and name "capacitive communication system and bluetooth pairing method".
Technical Field
The present invention relates to an interactive input device, and more particularly, to a capacitive touch device, a capacitive communication device, and a communication system.
Background
Capacitive sensors (capacitive sensor) typically include a pair of electrodes for sensing a finger. The amount of charge transfer between the pair of electrodes is changed when a finger is present, so that the presence or absence of the finger can be detected based on the change in the voltage value. The array of electrode pairs may form a sensing array.
Fig. 1A and 1B are schematic diagrams of a conventional capacitive sensor, which includes a first electrode 91, a second electrode 92, a driving circuit 93, and a detecting circuit 94. The driving circuit 93 is configured to input a driving signal to the first electrode 91, and an electric field is generated between the first electrode 91 and the second electrode 92 to transfer charges to the second electrode 92. The detection circuit 94 can detect the charge transfer amount of the second electrode 92.
When a finger is present, for example, represented by the equivalent circuit 8, the finger may interfere with the electric field between the first electrode 91 and the second electrode 92 to reduce the charge transfer. The detection circuit 94 detects the voltage change, thereby determining the presence of the finger.
In addition, when another capacitive sensor is close, the electric field between the first electrode 91 and the second electrode 92 can be changed to change the charge transfer amount. The detection circuit 94 can also detect a change in the voltage value, thereby determining the presence of the other capacitive sensor.
Disclosure of Invention
In view of the above, the present invention provides a capacitive touch device, a capacitive communication device and a communication system capable of detecting a touch event and performing near field communication.
The invention provides a capacitive touch device, a capacitive communication device and a communication system, which can judge a touch event according to vector norm changes of two detection components and perform near field communication according to phase changes of detection signals.
The invention also provides a capacitive touch device, a capacitive communication device and a communication system, which have longer transmissible distance.
The invention also provides a capacitive communication system for identifying different objects and exchanging data with said objects by means of near field communication.
The invention also provides a bluetooth pairing (Bluetooth pairing) method with a simplified triggering procedure.
The invention provides a capacitive communication system, which comprises an object and a capacitive touch panel. The object includes at least one sensing conductor and a controller. The controller is coupled to the at least one sensing conductor for modulating a potential of the at least one sensing conductor as identification data. The capacitive touch panel comprises at least one detection electrode and a processing unit. The at least one detection electrode is used for forming a coupling electric field with the at least one induction conductor, wherein the detection electrode is used for outputting a detection signal relative to the identification data according to the coupling electric field. The processing unit is used for judging whether the object belongs to a specific object according to the detection signal.
The invention also provides a Bluetooth pairing method which is suitable for a Bluetooth pairing program between a master device comprising a capacitive touch panel and a slave device comprising at least one sensing conductor. The Bluetooth pairing method comprises the following steps: sensing the at least one sensing conductor by the capacitive touch panel; when the capacitive touch panel senses the at least one sensing conductor, the main device identifies configuration characteristics of the at least one sensing conductor; and performing the Bluetooth pairing procedure when the master device determines that the configuration feature meets a preset protocol.
The invention also provides a capacitive communication system which comprises an object and a capacitive touch panel. The object includes a plurality of sensing conductors to exhibit different potential profiles at different times by modulating their potential. The capacitive touch panel comprises a plurality of detection electrodes for forming coupling electric fields with the plurality of sensing conductors to sense the different electric potential distributions at the different times, wherein when the different electric potential distributions accord with a preset protocol, near field communication between the capacitive touch panel and the object is established.
The invention provides a mouse comprising a plurality of sensing conductors and a controller. At least one of the plurality of sensing conductors is used as a clock frequency bit, and one of the plurality of sensing conductors is used as a positioning bit for identifying the placement direction of the mouse. The controller is coupled to the plurality of sensing conductors for modulating the electric potentials of the plurality of sensing conductors as configuration characteristics so as to judge whether the mouse belongs to a specific object.
The invention provides a capacitive touch device for near field communication with an object comprising a plurality of sensing conductors, one of which is used as a positioning bit. The capacitive touch device comprises at least one detection electrode and a processing unit. The detection electrode is used for forming a coupling electric field with the plurality of induction conductors, wherein the detection electrode is used for outputting a detection signal according to the coupling electric field. The processing unit is used for judging whether the object belongs to a specific object according to the detection signal, and identifying the placement direction of the object relative to the capacitive touch device according to the positioning bit.
The invention also provides a mouse comprising a plurality of sensing conductors for representing different potential distributions at different times by modulating the potential thereof after entering a near field communication mode. The plurality of sensing conductors have a predetermined area, a predetermined arrangement, and a predetermined potential distribution before entering the near field communication mode, so as to distinguish the mouse from other objects.
In the capacitive touch device, the capacitive communication device and the communication system according to some embodiments of the present invention, the phase modulation driving signal may be a phase shift key modulation (PSK) signal or a differential phase shift key modulation (DPSK) signal. The phase shift key modulated (PSK) signal may be a binary phase shift key modulated (BPSK) signal, a quadrature phase shift key modulated (QPSK) signal, an 8-PSK modulated signal, or a 16-PSK modulated signal. The differential phase shift key modulated (DPSK) signal may be a differential binary phase shift key modulated (DBPSK) signal, a differential quadrature phase shift key modulated (DQPSK) signal, a D-8PSK modulated signal, or a D-16PSK modulated signal.
In the invention, the capacitive touch panel is a self-capacitance type touch panel or a mutual capacitance type touch panel.
In the invention, the object is, for example, an electronic lock, a mouse, an earphone, a watch, a bracelet, a smart pen, a doll, or an electronic mobile device (electronic mobiledevice) comprising another capacitive touch panel.
To make the above and other objects, features and advantages of the present invention more apparent, the following detailed description will be made in conjunction with the accompanying drawings. In the present invention, the same members are denoted by the same symbols, and will be described in advance.
Drawings
FIGS. 1A-1B are schematic block diagrams of a conventional capacitive sensor;
FIG. 2 is a schematic diagram of a capacitive touch sensing device according to an embodiment of the invention;
FIGS. 3A-3B are schematic diagrams of capacitive touch sensing devices according to some embodiments of the invention;
FIG. 4 is a schematic diagram of vector norms and threshold values in a capacitive touch sensing device according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a capacitive touch sensing device according to another embodiment of the invention;
FIG. 6 is a flowchart illustrating the operation of the capacitive touch sensing device of FIG. 5;
FIG. 7 is a block diagram of a communication system according to an embodiment of the invention;
FIG. 7A is a schematic diagram of quadrature phase shift keying phase modulation;
FIG. 8 is another block diagram of a communication system according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating the operation of a communication system according to an embodiment of the present invention;
FIG. 10 is a timing diagram illustrating operation of a communication system according to an embodiment of the present invention;
FIGS. 11A-11C are schematic diagrams of electric fields between a driving electrode and a receiving electrode;
FIG. 12 is a flow chart of a communication method of a communication system according to an embodiment of the present invention;
FIG. 13 is a block diagram of a capacitive communication system according to yet another embodiment of the present invention;
FIG. 14 is a schematic diagram of a capacitive communication system according to yet another embodiment of the present invention;
FIG. 15A is a diagram illustrating identification data according to another embodiment of the present invention;
FIG. 15B is a diagram illustrating a transmission of data according to another embodiment of the present invention;
FIG. 16 is a schematic view of an object and a sensing conductor according to yet another embodiment of the present invention;
FIG. 17 is a schematic illustration of the operation of the object of FIG. 16;
FIG. 18 is a schematic diagram of controlling the potential of a sense conductor in accordance with yet another embodiment of the present invention;
FIG. 19 is a block diagram of Bluetooth pairing in accordance with yet another embodiment of the invention;
fig. 20-21 are flowcharts of bluetooth pairing in accordance with yet another embodiment of the invention.
Description of the reference numerals
10、10 11 -10 nm Sensing unit 410, 510
101. 91 first electrode
102. 92 second electrode
103. Coupling capacitor
11. Time sequence controller
12、12 1 -12 n Driving unit
13. 94 detection circuit
131. 131', 531', 551 multipliers
132. 132' integrator
133. 133' analog-to-digital conversion unit
14. Processing unit
400. First capacitive touch device
500. Second capacitance touch device
401. 501 touch sensing area
40. 50 touch panel
42. 52 drive circuit
421. 521 driving unit
422. 522 phase modulation unit
522' modulator
4221. Encoder with a plurality of sensors
4222. Modulation unit
43. 53 detection circuit
44. 54 processing unit
541. Coordinate rotation digital computer
542. Decoding unit
55. Efficiency circuit
93. Driving circuit
8. Finger with finger tip
x (t) drive signal
y (t) detection signal
y 1 (t)、y 2 (t) post-modulation detection Signal
y d (t) digitizing the detection signal
SW 1 -SW m Switching element
S 1 、S 2 Signal signal
I. Component of Q detection vector
Dc near field communication distance
Ec coupling electric field
Data transmission Data
Ed driving electrode
Er receiving electrode.
Detailed Description
Fig. 2 is a schematic diagram of a capacitive touch sensing device according to an embodiment of the invention. The capacitive touch sensing device of the present embodiment includes a sensing unit 10, a driving unit 12, a detecting circuit 13, and a processing unit 14. The capacitive touch sensing device detects whether an object (e.g., without limitation, a finger or a metal sheet) is close to the sensing unit 10 by judging a change in charge of the sensing unit 10.
The sensing unit 10 includes a first electrode 101 (e.g., a driving electrode) and a second electrode 102 (e.g., a receiving electrode), and when a voltage signal is input to the first electrode 101, an electric field can be generated between the first electrode 101 and the second electrode 102 to form a coupling capacitor 103. The first electrode 101 and the second electrode 102 may be appropriately configured without any particular limitation, as long as the coupling capacitor 103 can be formed (e.g., via a dielectric layer); the principle of generating an electric field between the first electrode 101 and the second electrode 102 and the coupling capacitance 103 is known, and is not described herein. The invention can eliminate the interference of the phase difference caused by the signal on-line capacitance to the detection result.
The driving unit 12 is, for example, a signal generating unit, for inputting a driving signal x (t) to the first electrode 101 of the sensing unit 10. The drive signal x (t) may be a time-varying signal, such as a periodic signal. In other embodiments, the driving signal x (t) may be a meander signal (e.g., a sine wave, or a pulse signal (e.g., a square wave), but is not limited thereto. The driving signal x (t) may couple the detection signal y (t) to the second electrode 102 through the coupling capacitor 103.
The detection circuit 13 is coupled to the second electrode 102 of the sensing unit 10, and is configured to detect the detection signal y (t), and modulate the detection signal y (t) with two signals to generate a pair of modulated detection signals as two components I, Q of a two-dimensional detection vector. The two signals are, for example, successive signals or vectors that are orthogonal or non-orthogonal to each other. In one embodiment, the two signals include a sine signal and a cosine signal; that is, the two signals preferably have different phases.
The processing unit 14 is configured to calculate a magnitude (magnitude) of the pair of modulated detection signals as a vector norm (norm) of the two-dimensional detection vector (I, Q), and compare the vector norm with a threshold TH to determine a touch event (touch event). In one embodiment, the processing unit 14 may calculate the vector norms using software In another embodiment, the processing unit 14 may also perform calculations using hardware or software, such asThe coordinate rotation digital calculator (CORDIC, coordinate rotation digital computer) shown in fig. 4 calculates the vector norm ++>CORDIC is a known fast algorithm, among others. For example, when no object is close to the sensing unit 10, it is assumed that the vector norm calculated by the processing unit 14 is R; as an object approaches the sensing unit 10, the vector norm decreases to R'. When the vector norm R' is less than the threshold TH, the processing unit 14 may then determine that an object is located near the sensing unit 10 and cause a touch event. It has to be noted that the vector norm R may also be increased when other objects, such as metal sheets, approach the sensing unit 10. Thus, the processing unit 14 may determine a touch event when the vector norm changes to be greater than a preset threshold.
In another embodiment, the processing unit 14 may encode the two components I and Q of the two-dimensional detection vector using Quadrature Amplitude Shift Keying (QASK), such as 16-QASK. The processing unit 14 has previously corresponded part of the code to a touch event and another part of the code to non-touch and stored the code. When the processing unit 14 calculates the QASK codes of the current two components I and Q from the modulated detection signal, it can be determined whether an object is close to the sensing unit 10.
Fig. 3A and 3B are schematic diagrams of a capacitive touch sensing device according to an embodiment of the invention, which illustrate an implementation of the detection circuit 13.
In fig. 3A, the detection circuit 13 comprises two multipliers 131 and 131', two integrators 132 and 132', an analog-to-digital conversion unit (ADC) 133 for processing the detection signal y (t) to generate a two-dimensional detection vector (I, Q). The analog-to-digital conversion unit 133 is configured to digitize the detection signal y (t) to generate a digitized detection signal y d (t). The two multipliers 131 and 131' are used for respectively dividing two signals S 1 、S 2 And the digitized detection signal y d (t) modulating to produce a pair of modulationPost-processing detection signal y 1 (t) and y 2 (t). To sample the pair of modulated detection signals y 1 (t) and y 2 (t) modulating the pair of modulated detection signals y with the two integrators 132 and 132 1 (t) and y 2 (t) integrating to produce two digital components I, Q of the two-dimensional detection vector (I, Q); in this embodiment, the two integrators 132 and 132' may be any suitable integrating circuit, such as a capacitor (capacitor).
In fig. 3B, the detection circuit 13 includes two multipliers 131 and 131', two integrators 132 and 132', two analog-to-digital conversion units (ADCs) 133 and 133' for processing the detection signal y (t) to generate a two-dimensional detection vector (I, Q). The two multipliers 131 and 131' are used to respectively divide the two signals, for example, as shown at this time AndModulated with the detection signal y (t) to generate a pair of modulated detection signals y 1 (t) and y 2 (t). To sample the pair of modulated detection signals y 1 (t) and y 2 (t) modulating the pair of modulated detection signals y with the two integrators 132 and 132 1 (t) and y 2 (t) integrating. In the present embodiment, the form of the two integrators 132 and 132' is not particularly limited, and may be, for example, a capacitor. The two analog-to-digital conversion units 133 and 133' are used for digitizing the integrated modulated detection signal y 1 (t) and y 2 (t) to generate two digital components I, Q of the two-dimensional detection vector (I, Q). It can be appreciated that the two analog-to-digital conversion units 133 and 133 'can start to acquire digital data when the potential variation of the two integrators 132 and 132' is stabilized.
The two signals may be two vectors, such as S, in addition to the two consecutive signals described above 1 ＝[1 0 -1 0]And S is 2 ＝[0 -1 0 1]To simplify the circuit architecture. The saidThe two signals are not particularly limited as long as they are suitable simplifying vectors that can simplify the modulation and demodulation processes.
In summary, the detection method of the capacitive touch sensing device according to the embodiment of the invention includes the following steps: inputting a driving signal to a first electrode of the sensing unit; modulating the detection signals of the driving signals coupled to the second electrode through the coupling capacitor by two signals respectively to generate a pair of modulated detection signals; and calculating the magnitude of the modulated detection signal and judging a touch event according to the magnitude.
For example, referring to fig. 3A, after the driving unit 12 inputs a driving signal x (t) to the first electrode 101 of the sensing unit 10, the driving signal x (t) couples a detection signal y (t) to the second electrode 102 of the sensing unit 10 through the coupling capacitor 103. The analog-to-digital conversion unit 133 then digitizes the detection signal y (t) to generate a digitized detection signal y d (t). The detection circuit 13 uses two signals S 1 S and S 2 Respectively modulating the digitized detection signals y d (t) to generate a pair of modulated detection signals y 1 (t) and y 2 (t); wherein the two signals may be two vectors S at this time 1 ＝[1 0 -1 0]S and S 2 ＝[0 -1 0 1]. The processing unit 14 calculates the pair of modulated detection signals y 1 (t) and y 2 The magnitude of (t) and determining a touch event based thereon; wherein the pair of modulated detection signals y is calculated 1 (t) and y 2 The size of (t) can be described with reference to fig. 4, for example. Furthermore, after calculating the pair of modulated detection signals y 1 (t) and y 2 Before the magnitude of (t), the pair of modulated detection signals y may be integrated using the integrator 132 and/or 132 1 (t) and y 2 (t) then outputting two digital components I, Q of the two-dimensional detection vector (I, Q).
For example, referring to fig. 3B, after the driving unit 12 inputs a driving signal x (t) to the first electrode 101 of the sensing unit 10, the driving signal x (t) couples a detection signal y (t) to the second electrode 102 of the sensing unit 10 through the coupling capacitor 103. Then, the detecting electricity Path 13 is divided into two signals S 1 S and S 2 Respectively modulating the detection signals y (t) to generate a pair of modulated detection signals y 1 (t) and y 2 (t). The processing unit 14 calculates the pair of modulated detection signals y 1 (t) and y 2 The magnitude of (t) and determining a touch event based thereon; wherein the pair of modulated detection signals y is calculated 1 (t) and y 2 The size of (t) can be described with reference to fig. 4, for example. Furthermore, after calculating the pair of modulated detection signals y 1 (t) and y 2 Before the magnitude of (t), the pair of modulated detection signals y may be integrated using the integrator 132 and/or 132 1 (t) and y 2 After (t), two digital components I, Q of the two-dimensional detection vector (I, Q) are digitized by the analog-to-digital conversion units 133 and/or 133'.
Fig. 5 is a schematic diagram of a capacitive touch sensing device according to another embodiment of the invention. The plurality of sensing units 10 arranged in an array form a capacitive sensing array, each column of sensing units 10 is formed by a driving unit 12 1 -12 n The detection circuit 13 is driven by a plurality of switch assemblies SW 1 -SW m One of which detects the output signal of each row of sensing units 10. As shown in fig. 5, the driving unit 121 is used to drive the first column sensing unit 10 11 -10 1m The method comprises the steps of carrying out a first treatment on the surface of the Drive unit 12 2 For driving the second column of sensing cells 10 21 -10 2m The method comprises the steps of carrying out a first treatment on the surface of the …; drive unit 12 n For driving the nth column sense cells 10 n1 -10 nm The method comprises the steps of carrying out a first treatment on the surface of the Wherein n and m are positive integers and their values can be determined according to the size and resolution of the capacitive sensing array, without specific limitation.
In this embodiment, each of the sensing units 10 (here, shown as circles) includes a first electrode and a second electrode for forming a coupling capacitance therebetween, as shown in fig. 2, 3A and 3B. The plurality of driving units 12 1 -12 n Are respectively coupled to first electrodes of a row of sensing units 10. The timing controller 11 is used for controlling the driving units 12 1 -12 n The driving signals x (t) are sequentially output to the first electrodes of the plurality of sensing units 10.
The detection circuit 13 is provided with a plurality of switch assemblies SW 1 -SW m The second electrodes of the sensing units 10 are respectively coupled to one row for sequentially detecting the detection signals y (t) of the driving signals x (t) coupled to the second electrodes through the coupling capacitors of the sensing units 10. The detection circuit 13 modulates the detection signals y (t) with two signals, respectively, to generate a pair of modulated detection signals; the manner of generating the modulated detection signal is described in detail in fig. 3A and 3B and the related description, and thus is not repeated here.
The processing unit 14 determines the touch event and the touch position according to the pair of modulated detection signals. As described above, the processing unit 14 may calculate a vector norm of a two-dimensional detection vector formed by the pair of modulated detection signals, and determine the touch event when the vector norm is equal to or greater than the threshold TH, as shown in fig. 4.
In the present embodiment, when the timing controller 11 controls the driving unit 12 1 Outputting the driving signal x (t) to the first column sensing unit 10 11 -10 1m The plurality of switch assemblies SW 1 -SW m Sequentially turned on to enable the detection circuit 13 to sequentially detect the first row of sensing units 10 11 -10 1m A detection signal y (t) output by each of the sensing units. Then, the timing controller 11 sequentially controls the other driving units 12 2 -12 n Outputting the driving signal x (t) to each column of sensing units. When the detection circuit 13 detects all the sensing units, a scan period (scan period) is completed. The processing unit 14 determines the location of the sensing unit at which the touch event occurred as the touch location. It will be appreciated that the touch location may not occur with only one sensing unit 10, and that the processing unit 14 may consider all of the locations of the plurality of sensing units 10 as touch locations, or the location of one of the plurality of sensing units 10 (e.g., the center or center of gravity) as touch locations.
Referring to FIG. 6, a flowchart of the capacitive touch sensing device of FIG. 5 is shown, including the following stepsThe method comprises the following steps: inputting a driving signal to a sensing unit of the capacitive sensing array (step S 31 ) The method comprises the steps of carrying out a first treatment on the surface of the Digitizing the detection signal output by the sensing unit (step S 32 ) The method comprises the steps of carrying out a first treatment on the surface of the The digitized detection signals are modulated with two signals respectively to generate a pair of modulated detection signals (step S 33 ) The method comprises the steps of carrying out a first treatment on the surface of the Integrating the pair of modulated detection signals (step S 34 ) The method comprises the steps of carrying out a first treatment on the surface of the And judging the touch event and the touch position (step S) 35 ). The operation of this embodiment is described in detail in fig. 5 and the related description, and thus will not be repeated here.
In another embodiment, in order to save power consumption of the capacitive touch sensing device in fig. 5, the timing controller 11 can control the driving units 12 1 -12 n And simultaneously outputting the driving signal x (t) to the sensing units of the corresponding column. The detection circuit 13 uses two different continuous signals S 1 、S 2 Each column of detection signals y (t) is modulated separately for discrimination. In addition, the manner of determining the touch event and the touch position is similar to that of fig. 5, so that the description thereof is omitted.
In the embodiment of the present invention, the detection circuit 13 may further include a filter and/or an amplifier to increase the signal quality. In addition, the processing unit 14 may also be incorporated in the detection circuit 13.
In the above embodiment, since the phase change of the transmission signal caused by the signal line does not affect the vector norms of the two detection components I, Q (i.e., the digital components) of the detection signal y (t), the effect of the phase difference generated by the signal line is eliminated by modulating the detection signal y (t) with the two signals at the receiving end. Similarly, if the driving signal itself or the sensing signal from the external device has a phase change, as described above, the phase change in the driving signal and the external sensing signal will not affect the vector norms of the two detection components of the detection signal, and thus will not affect the judgment of the touch event. Therefore, the invention performs near field communication based on phase modulation to realize the capacitive touch device, the capacitive communication device and the communication system with the touch judgment and near field communication functions.
Fig. 7 is a schematic diagram of a communication system according to an embodiment of the invention, which includes a first capacitive touch device 400 and a second capacitive touch device 500. In an embodiment, the first capacitive touch device 400 and the second capacitive touch device 500 are respectively applied to portable electronic devices, such as smart phones, smart watches, tablet computers, personal digital assistants, etc., or to wearable electronic devices (wearable electronic device) for near field communication by an induced electric field coupled between the two devices. In another embodiment, one of the first capacitive touch device 400 and the second capacitive touch device 500 is applied to a portable electronic device or a wearable electronic device, and the other one is applied to a home appliance device, a security system, an automation system, a vehicle electronic device, etc. for accessing related information of the electronic device or performing relative control.
The first capacitive touch device 400 includes a touch panel 40, a plurality of driving circuits 42 (only one of which is shown for simplicity of illustration), a detection circuit 43, and a processing unit 44. The second capacitive touch device 500 includes a touch panel 50, a plurality of driving circuits 52 (only one of which is shown for simplicity of illustration), a detection circuit 53, and a processing unit 54. In the present embodiment, near field communication is performed by the coupling electric field Ec between the touch panel 40 and the touch panel 50. In other words, the touch panel 50 is an external touch panel with respect to the first capacitive touch device 400; the touch panel 40 is an external touch panel with respect to the second capacitive touch device 500.
The touch panel 40 includes a plurality of driving electrodes Ed and a plurality of receiving electrodes Er (see fig. 8, for example). As described above, the sensing unit 410 may be formed between the driving electrodes Ed and the receiving electrodes Er for sensing the proximity conductor. As shown in fig. 8, the touch sensing area 401 of the touch panel 40 includes a plurality of sensing units 410. When an external touch panel (here, for example, the touch panel 50) approaches, the driving electrodes Ed and the receiving electrodes Er may further form a coupling electric field Ec with the external touch panel. In more detail, the plurality of driving electrodes Ed of the touch panel 40 and at least one receiving electrode of the external touch panel form the coupling electric field Ec, or the plurality of receiving electrodes Er of the touch panel 40 and at least one driving electrode of the external touch panel form the coupling electric field Ec, depending on the function of the touch panel 40, for example, as a transmitting end, a receiving end or a transceiver (transceiver). Similarly, the touch panel 50 includes a plurality of driving electrodes Ed and a plurality of receiving electrodes Er for forming a sensing unit 510 therebetween and forming a coupling electric field Ec with an external touch panel (herein, for example, the touch panel 40). As shown in fig. 8, the touch sensing area 501 of the touch panel 50 includes a plurality of sensing units 510. It is understood that the touch sensing area 401 and the touch sensing area 501 may have the same or different resolutions.
The driving circuits 42 are respectively coupled to the driving electrodes Ed (see fig. 5, for example) of the touch panel 40, and respectively include a driving unit 421 and a phase modulation unit 422. The driving unit 421 may output a fixed phase driving signal x (t) or transmission Data1; wherein the stationary phase driving signal x (t) is a driving signal in a touch detection mode and the transmission Data1 is used to be transmitted to an external touch panel in a near field communication mode. The fixed phase driving signal x (t) may be a continuous or discontinuous signal of square wave, sine wave, triangular wave, trapezoidal wave, etc., without particular limitation. In one embodiment, the driving circuits 42 are coupled to the driving electrodes Ed through a plurality of switching elements (not shown), respectively.
The phase modulation unit 422 includes a coding unit 4221 and a modulation unit 4222. The encoding unit 4221 is configured to encode the transmission Data1, and the modulating unit 4222 modulates the encoded transmission Data by phase modulation and outputs a phase modulation driving signal X 1 (t)＝r 1 ∠θ 1 . In one embodiment, the phase modulation driving signal X 1 (t) may be a phase shift key modulated (PSK) signal; the phase shift key modulation signal may be a binary phase shift key modulation (BPSK) signal, a quadrature phase shift key modulation (QPSK) signal, an 8-PSK modulation signal or a 16-PSK modulation signal, but is not limited thereto. In another embodiment, the phase modulation driver Dynamic signal X 1 (t) may be a differential phase shift key modulated (DPSK) signal; the differential phase shift key modulation signal may be a differential binary phase shift key modulation (DBPSK) signal, a differential quadrature phase shift key modulation (DQPSK) signal, a D-8PSK modulation signal, or a D-16PSK modulation signal, but is not limited thereto.
Similarly, the driving circuits 52 are respectively coupled to the driving electrodes Ed of the touch panel 50. The plurality of driving circuits 52 includes a driving unit 521 for outputting a fixed phase driving signal X (t) or transmission Data2, and a phase modulating unit 522 for outputting a phase modulating driving signal X 2 (t)＝r 2 ∠θ 2 To the coupled drive electrode Ed. In one embodiment, the driving circuits 52 are coupled to the driving electrodes Ed through a plurality of switching elements (not shown), respectively.
For example, fig. 7A is a schematic diagram of Quadrature Phase Shift Keying (QPSK) phase modulation. The encoding unit 4221 encodes the transmission data into, for example, 11, 01, 00, and 10 codes, and the modulating unit 4222 modulates and outputs driving signals X in four phases of 45 °, 135 °, 225 °, and 315 ° according to the codes of the encoding unit 4221, respectively 1 (t)＝r 1 ∠θ 1 And the driving signal X 1 (t) is input to the plurality of driving electrodes Ed.
As described above, the plurality of receiving electrodes Er of the touch panel 40 are respectively configured to output the detection signals y according to the coupling electric field Ec and the coupling electric field between the driving electrode and the receiving electrode therein 1 (t). In the touch detection mode, the detection signal y 1 (t) is related to the driving signal inputted to the touch panel 40. In the near field communication mode, the detection signal y 1 (t) may be related to only the driving signal input to the touch panel 50 or to the driving signals input to the touch panel 40 and the touch panel 50 at the same time. The plurality of receiving electrodes Er of the touch panel 50 are respectively configured to output detection signals y according to the coupling electric field Ec and the coupling electric field between the driving electrode and the receiving electrode therein 2 (t); similarly, the detection signal y 2 (t) included informationDepending on the current mode of operation of the touch panel 50.
As described above, the detection circuit 43 is sequentially coupled to the plurality of receiving electrodes Er (as shown in fig. 5) of the touch panel 40, and modulates the detection signal y with two signals respectively 1 (t) to generate two detection components I 1 、Q 1 As shown in fig. 3A and 3B. The detection circuit 53 is sequentially coupled to the plurality of receiving electrodes Er (as shown in fig. 5) of the touch panel 50, and uses two signals S 1 、S 2 Respectively modulating the detection signals y 2 (t) to generate two detection components I 2 、Q 2 . As previously described, the detection circuits 43, 53 may further include an integrator for integrating the detection signal y (t) and an analog-to-digital conversion unit (ADC) for performing analog-to-digital conversion, as shown in fig. 3A and 3B.
The processing unit 44 is coupled to the detection circuit 43 for detecting the component I according to the two detection components 1 、Q 1 The vector norms are found to determine the touch event, wherein the processing unit 44 may calculate the vector norms using a coordinate rotation digital computer (CORDIC) and compare with a threshold TH as shown in fig. 4. The processing unit 54 is coupled to the detection circuit 53 for detecting the component I according to the two detection components 2 、Q 2 Obtaining vector norms to judge touch events and according to the two detection components I 2 、Q 2 Obtaining a phase value to decode the transmission Data1'; the transmission Data1' is completely equal to or partially equal to the transmission Data1 transmitted by the first capacitive touch device 400, depending on a bit error rate (bit error rate). In the present embodiment, the transmission Data1' is calculated by the coordinate rotation digital calculator 541, for example, to calculate the two detection components I 2 、Q 2 Arctangent function arctan (Q) 2 ，I 2 ) After the phase value is obtained, the phase value is decoded by the decoding unit 542. It can be appreciated that the decoding unit 542 decodes the phase value corresponding to the encoding of the encoding unit 4221.
In addition, in this embodiment, to reduce the error rate of the transmission data, the processing unit54 may also include performance circuitry 55. The performance circuit 55, for example, includes an error detector (error detector) for detecting error rates and a Phase Locked Loop (PLL) for synchronizing signals, tracking input frequencies, or generating multiples of the input frequencies. The phase-locked loop includes, for example, a loop oscillator (VCO), a voltage controlled oscillator (NCO), or a Numerical Controlled Oscillator (NCO), etc., and the output of the performance circuit 55 can be fed back (feedback) to the multipliers 531, 531', 551; wherein the plurality of multipliers 531, 531' are used to divide two signals (e.g., S of fig. 7 1 ,S 2 ) And the detection signal y 2 (t) modulating, and the multiplier 551 is used for feeding back the output of the performance circuit 55 to the detection signal y 2 (t), for example, adjusting the gain (gain) thereof.
In addition, if the touch panel 40 is also used as a receiving end of the communication system, the processing unit 44 also generates the two detection components I according to the two detection components I 1 、Q 1 The phase value is obtained to decode the transmission Data2', and the same program and functions as those of the processing unit 54 are performed, for example, but not limited to, a performance circuit, a decoding unit, etc.
It should be noted that the driving circuit 52 of the second capacitive touch device 500 in fig. 7 may include both the driving unit 521 and the phase modulating unit 522, or include the driving unit 521 without including the phase modulating unit 522, depending on the functions thereof. For example, if the second capacitive touch device 500 is used for receiving near field transmission data and not for transmitting near field transmission data, the driving circuit 52 may include only the driving unit 521 for transmitting the phase-fixed driving signal x (t). In addition, the detection circuit 43 and the processing unit 44 of the first capacitive touch device 400 in fig. 7 can be the same as the detection circuit 53 and the processing unit 54 of the second capacitive touch device 500, which are not shown for simplicity of drawing. In addition, the processing unit 44 of the first capacitive touch device 400 in fig. 7 may not include performance circuits and decoding units, depending on the functions. For example, if the first capacitive touch device 400 is used to determine a touch event without near field communication, only the touch event may be included Comprising a coordinate-rotation digital calculator for calculating two detected components I 1 、Q 1 Instead of calculating the phase value from it.
More specifically, in the first capacitive touch device 400 and the second capacitive touch device 500, when the function of sending out near field transmission data is provided, the driving end includes a phase modulation unit, otherwise, the driving end may not include a phase modulation unit; when having the function of receiving near field transmission data, the receiving end comprises a decoding unit (in some embodiments, a performance circuit) and is used for calculating phasor norms and phase values according to the two detection components; otherwise, the receiving end may not include the performance circuit and the decoding unit, and is configured to calculate phasor norms of the two detection components instead of calculating the phase value according to the two detection components.
For example, in one embodiment, the first capacitive touch device 400 is used as a transmitting device for near field communication and the second capacitive touch device 500 is used as a receiving device for near field communication. When the distance between the first capacitive touch device 400 and the second capacitive touch device 500 is greater than the near field communication distance Dc (e.g., 10 cm), as shown in fig. 9, the second capacitive touch device 500 is operated in the touch detection mode, and the driving circuit 52 outputs the fixed phase driving signal x (t). When the driving circuit 52 does not receive a communication enable signal, the stationary phase driving signal x (t) is continuously outputted; the communication enable signal is used to enable the second capacitive touch device 500 to enter a near field communication mode from the touch detection mode.
In an embodiment, the second capacitive touch device 500 may detect an access code (access code) continuously or every predetermined time in a synchronization process, so as to determine whether to enter the near field communication mode; the access code includes, for example, a sync word (synchronization word), a compensation bit (compensation code), and/or a device address (device address). To detect whether to enter the near field communication mode, the processing unit 54 may detect the component I from the same set of two 2 、Q 2 The vector norms and the phase values are calculated as shown in the lower part of fig. 10. As indicated previously, byThe phase change in the detection signal does not affect the two detection components I 2 、Q 2 So the processing unit 54 can determine the phasor norms of the (e.g., t of FIG. 10) according to the same time interval touch &t com ) Is a component I of the two detection components of (1) 2 、Q 2 And calculating vector norms and the phase values at the same time. In another embodiment, the processing unit 54 can also detect the component I according to different sets of two 2 、Q 2 Alternately (e.g. t of FIG. 10) touch 、t com ) The vector norms and the phase values are calculated as shown in the upper half of fig. 10.
In the synchronization procedure, the processing unit 54 is configured to compare the plurality of transmission data with a preset code sequence (e.g. an access code) to confirm whether synchronization is completed; the predetermined code sequence includes, for example, barker Codes (Barker Codes), which can be used to synchronize phases of a transmitting end and a receiving end, but is not limited thereto. The predetermined code sequence may also be other codes used by known communication systems. In an embodiment, when the processing unit 54 recognizes that the correlation (correlation) between the plurality of phase values (or the transmission data) and the preset code sequence exceeds a threshold, the processing unit 54 controls the second capacitive touch device 500 to enter a near field communication mode. In another embodiment, when the processing unit 54 recognizes that the plurality of phase values (or the transmission data) conform to a preset code sequence (such as an access code), the processing unit 54 controls the second capacitive touch device 500 to enter a near field communication mode. For example, when the near field communication mode is entered, the processing unit 54 outputs the communication enable signal to the driving circuit 52 and stops judging the touch event to decode only the transmission data. When the driving circuit 52 receives the communication enable signal, the output of the driving signal x (t) is stopped.
In another embodiment, the communication enable signal may be sent according to a start signal of a preset application software (APP) or a press signal of a key. For example, when an icon (icon) displayed on the display screen of the second capacitive touch device 500 is clicked or a key is pressed, the processing unit 54 receives the start signal or the pressing signal and outputs the communication enable signal to the driving circuit 52. Then, the processing unit 54 detects the access code during the synchronization, and receives a load (payload), i.e. the transmission Data1, from the first capacitive touch device 400 when the synchronization is completed.
In this embodiment, the first capacitive touch device 400 is used as a transmission end for communicating with an external electric field, so the first capacitive touch device 400 is used as a capacitive communication device. The first capacitive touch device 400 includes at least one driving electrode Ed for forming the coupling electric field Ec with an external electric field. The driving circuit 42 is configured to output a phase modulation driving signal of the predetermined code sequence (e.g. an access code) to the at least one driving electrode Ed of the touch panel 40 for transmission by the coupling electric field Ec. For example, the first capacitive touch device 400 may include only the driving electrode Ed as a transmitting antenna to form a touch detection point.
In this embodiment, since the second capacitive touch device 500 is used as a receiving end for communicating with an external electric field, the second capacitive touch device 500 is used as a capacitive communication device. The second capacitive touch device 500 may include at least one receiving electrode Er as a receiving antenna for forming a coupling electric field Ec with the external electric field, and the receiving electrode Er is configured to output a detection signal y according to the coupling electric field Ec 2 (t)。
Fig. 11A-11C are schematic diagrams showing the induced electric field between the driving electrode Ed and the receiving electrode Er. According to fig. 11A and 11B, when the fingers are close, the induced electric field is weakened, i.e., E2< E1. According to fig. 11A and 11C, when the external capacitive touch device 500 approaches, the induced electric field is increased, i.e., E3> E1. Therefore, although the touch event and the transmission data can be detected simultaneously in the present invention, the threshold TH for comparison with the vector norm may be different in the touch detection mode and the near field communication mode, thereby increasing the accuracy of judging the touch event. For example, in near field communication mode, a higher threshold may be used.
Referring to fig. 12, a flowchart of a communication method of a communication system according to an embodiment of the invention includes the following steps: inputting a phase modulation driving signal to a touch sensing area of the first touch panel (step S61); sensing the coupling electric field with a touch sensing area of the second touch panel and outputting a detection signal (step S62); inputting a stationary phase driving signal to a touch sensing area of the second touch panel (step S63); modulating the detection signals with two signals respectively and generating two detection components (step S64); obtaining a phase value according to the two detection components to decode transmission data from the first touch panel (step S65); and determining a vector norm according to the two detection components to determine a touch event of the second touch panel (step S66); steps S63 and S66 may not be performed according to different embodiments.
Referring to fig. 7, 9 and 12, the details of the present embodiment will be described.
Step S61: when the distance between the first touch panel (e.g., the touch panel 40) and the second touch panel (e.g., the touch panel 50) is smaller than the near field communication distance Dc, the first touch panel 40 enters a near field communication mode. At this time, the driving circuit (e.g., the driving circuit 42) of the first capacitive touch device 400 inputs the phase modulation driving signal X 1 (t)＝r 1 ∠θ 1 To the touch sensing area 401 of the first touch panel 40. For example, the distance may be determined based on the electric field increment (e.g., fig. 11C).
Step S62: since the distance between the first touch panel 40 and the second touch panel 50 is smaller than the near field communication distance Dc, a coupling electric field Ec is formed therebetween. The touch sensing region 501 of the second touch panel 50 outputs a detection signal y according to the coupling electric field Ec 2 (t)。
Step S63: if the second touch panel 50 does not detect a touch event in the near field communication mode, this step may not be performed. Otherwise, the driving circuit 52 of the second capacitive touch device 500 may output a stationary phase driving signal x (t) to the touch sensing area 501 of the second touch panel 50, so that the detection signal y 2 (t) at the same time compriseThe output information of the driving circuit 42 and the driving circuit 52.
Step S64: the detection circuit 53 of the second capacitive touch device 500 uses two signals (e.g. S shown in fig. 3A 1 、S 2 ) Respectively modulating the detection signals y 2 (t) and generates two detection components I 2 、Q 2 。
Step S65: the processing unit 54 of the second capacitive touch device 500 is configured to detect the two detection components I according to the two detection components I 2 、Q 2 The phase value is obtained to decode the transmission Data1' from the first touch panel 40.
Step S66: if the second touch panel 50 does not detect a touch event in the near field communication mode, this step may not be performed. Otherwise, the processing unit 54 of the second capacitive touch device 500 further generates the two detection components I according to the two detection components I 2 、Q 2 The vector norm is obtained and compared with at least one threshold (as shown in fig. 4) to determine the touch event of the second touch panel 400.
It should be noted that, in the present embodiment, the first touch panel 40 may also be used as a receiving end and the second touch panel 50 may also be used as a transmitting end. It can be appreciated that when the first touch panel 40 and the second touch panel 50 are both used for transmitting data, the data transmission time must be coordinated after the synchronization is completed, for example, the data is transmitted alternately.
Referring to fig. 13 and 14, fig. 13 is a block diagram of a capacitive communication system according to another embodiment of the invention; fig. 14 is a schematic diagram of a capacitive communication system according to yet another embodiment of the present invention. The capacitive communication system of the present embodiment includes an object 60 and a capacitive touch device; the capacitive touch device is illustrated by the second capacitive touch device 500 of fig. 7 to 9.
As described above, the second capacitive touch device 500 includes the capacitive touch panel 50 and has the touch sensing area 501. The elements of the second capacitive touch device 500 are described above, and thus are not described herein. In contrast, the capacitive touch device 500 in the present embodiment includes a modulator 522', which is not limited to performing phase modulation, but may also perform amplitude or frequency modulation.
The object 60 includes a plurality of sense conductors (e.g., 4 sense conductors P1-P4 are illustrated herein) for presenting different potential profiles at different times by modulating their potential. For example, in FIG. 15A, the plurality of sensing conductors P1-P4 are at time t 1 -t 4 Respectively at different potentials. FIG. 15A is a diagram of identification data according to another embodiment of the present invention, wherein the filled rectangle is "1" and the blank rectangle is "0", for example; the reverse can also be true. The material of the plurality of sensing conductors P1-P4 is not particularly limited, as long as the capacitance value detected by the touch sensing area 501 can be changed when the sensing conductors are close to the capacitive touch panel 50.
The capacitive touch panel 50 includes a plurality of detection electrodes (Ed and Er in FIG. 8) for forming a coupling electric field Ec (shown in FIG. 14) with the plurality of sensing conductors P1-P4 for different times (time t shown in FIG. 15A) 1 -t 4 ) Sensing the different potential profiles. When the different electric potential distribution accords with a preset cooperation between the capacitive touch panel 50 (or the capacitive touch device 500) and the object 60, near field communication between the capacitive touch panel 50 and the object 60 is established. In one embodiment, the near field communication is bluetooth communication, but not limited thereto.
The predetermined protocol is not particularly limited as long as the object 60 and the capacitive touch device 500 can be identified from each other. Therefore, the preset protocol may be preset before shipping or implemented by installing application software on the capacitive touch device 500. In one embodiment, the plurality of sensing conductors P1 and/or P4 are used as clock frequency bits for transmitting clock frequency Data, and the plurality of sensing conductors P2 and P3 are used as Data bits for transmitting Data1. The predetermined protocol is, for example, that the capacitive touch device 500 is at a relative time t 1 -t 4 The potential distribution as in fig. 15A is sequentially detected by the sensing frame (sensing frame). More specifically, the plurality of sense conductors P1-P4 are electrically connected at various times (e.g., t 1 -t 4 ) Between the potentials of (e.g. t) 1 -t 4 ) A kind of electronic deviceThe potential change can be detected by the capacitive touch panel 50.
In addition, to confirm the placement direction of the object 60 relative to the capacitive touch panel 50, one of the plurality of sensing conductors P1-P4 may be used as a positioning bit (orientation bit), for example, one of the clock frequency bits is used as the positioning bit. Thus, the relative direction of the object 60 and the capacitive touch panel 50 can be identified to confirm the bit order of the sensing conductors P2 and P3, for example, P2 is before P3 in the present invention.
The object 60 is, for example, an electronic lock, a mouse, an earphone, a watch, a bracelet, a smart pen, a doll, or an electronic mobile device including another capacitive touch panel. The plurality of sensing conductors P1-P4 are disposed on the object surface 61 of the object 60, for example, to facilitate sensing by the capacitive touch panel 50. For example, when the object 60 is a mouse 60 '(see fig. 16), the plurality of sensing conductors P1-P4 are respectively disposed on the lower surface of the mouse 60', for example, at 4 protruding fulcrums on the lower surface (i.e. the object surface 61), but not limited thereto. The plurality of sensing conductors P1-P4 may also be disposed within the interior of the object 60.
Thus, when the mouse 60' is placed on the capacitive touch panel 50 of the capacitive touch device 500 (for example, a notebook computer in fig. 17), the capacitive touch device 500 can detect the proximity of the plurality of sensing conductors P1-P4, for example, the capacitance value changes. The capacitive touch device 500 can determine whether to enter a near field communication mode according to the configuration characteristics of the plurality of sensing conductors P1-P4.
For example, the plurality of sensing conductors P1-P4 have configuration features of a predetermined area, a predetermined potential distribution, and a predetermined arrangement, and the configuration features are pre-stored in the memory of the capacitive touch device 500. When the capacitive touch device 500 confirms the preset area (the respective area of each sensing conductor), the preset potential distribution (the potential of each sensing conductor at a certain time), and/or the preset arrangement (the pitch and/or the arrangement shape), for example, the plurality of sensing units 510 (as shown in fig. 8) sensing the plurality of sensing conductors P1-P4 conform to the preset area, the preset potential distribution and/or the preset arrangement, a near field communication mode is entered to sense the different potential distributions at the different times. In more detail, the capacitive touch device 500 can identify each area, each potential or potential variation, arrangement shape or spacing, etc. of the sensing conductors P1-P4 according to the sensing units 510 sensing the sensing conductors P1-P4. And when the configuration characteristics conform to the information stored in the capacitive touch device 500, entering a near field communication mode.
In some embodiments, the configuration feature may also be a continuous time variation, such as a preset potential variation (i.e., a pattern of potential variations) of the single or multiple sensing conductors P1-P4 over a predetermined time period, or the like. Further, the configuration feature may be a combination of multiple sets of features to enhance the correctness of the identification. For example, the predetermined area, the predetermined potential distribution and/or the predetermined arrangement of the single or multiple sensing conductors P1-P4 are used as the configuration features of the first stage, and the predetermined potential variation of the single or multiple sensing conductors P1-P4 is used as the configuration features of the second stage.
When the potential variation pattern is used as the configuration feature, the capacitive touch device 500 preferably has a buffering time exceeding the predetermined time when it is determined that the touch is made; that is, the occurrence of a touch event is confirmed when the touch is detected by a plurality of consecutive sensing frames, and the detected capacitance change is not regarded as a touch event for the predetermined time.
Referring again to fig. 13 and 14, it should be noted that although fig. 13 and 14 show the object 60 including 4 sensing conductors P1-P4, this is for illustration only and not for limitation. The object 60 may include at least one sensing conductor (e.g., one, two), the number of which is not limited to the one set forth in the present invention. In addition, each sense conductor P1-P4 can have a different area or shape for separation.
The object 60 also includes a controller 63, such as a Microcontroller (MCU) or a specific function integrated circuit (ASIC), coupled to the at least one sense conductor. The controller 63 is configured to modulate the potential of the at least one sensing conductor as identification data;wherein the identification data is, for example, in the synchronization mode (synchronization pattern) in FIG. 15A, time t 1 -t 4 The potential distribution of the at least one sensing conductor (e.g., P1-P4). The identification data is used for the capacitive touch device 500 to identify different objects. In other words, the capacitive touch device 500 stores at least one object-related identification data therein (e.g., a memory) for comparing with the detection result. The memory may be a volatile or nonvolatile memory, and is not particularly limited.
The capacitive touch panel 50 includes at least one detection electrode (e.g., er of fig. 8) and a processing unit 54. The at least one detection electrode is used for forming a coupling electric field Ec with the at least one induction conductor, wherein the detection electrode is used for outputting a detection signal y corresponding to the identification data according to the coupling electric field Ec 2 (t). The processing unit 54 is a Central Processing Unit (CPU), for example, for generating the detection signal y 2 (t) determining whether the object 60 belongs to a specific object; the specific object is, for example, an object of the capacitive touch device 500 preset with corresponding application software, and information thereof is pre-stored in the capacitive touch device 500.
In one embodiment, the controller 63 modulates the potential of the at least one sensing conductor at a period to produce a potential change. For example, in FIG. 15A, at time t 1 -t 4 The potential change of the inductive conductor P1 is, for example, 1- > 0- > 1, where t 1 And t 2 Is equal to t 2 And t 3 Time interval of t 3 And t 4 Is a time interval of (2); the potential change of the plurality of sensing conductors P2-P4 is also shown in fig. 15A. Fig. 15A shows two clock frequency bits (upper diagram) and one clock frequency bit (lower diagram) at the same time, but is not limited thereto. The processing unit 54 of the capacitive touch device 500 is configured to generate the detection signal y according to the detection signal y 2 (t) taking the potential change and judging whether the detected object belongs to a specific object based on the potential change. For example, when the potential change of the sense conductor P1 (e.g., using a bit discrimination) coincides with 1 at a continuous timeWhen 1, 0 and 1, the object can be judged to belong to a preset specific object. The capacitive touch device 500 may then execute an application program (APP) or other control with respect to the particular object, which may be application specific.
Referring to fig. 18, in some embodiments, the controller 63 controls the plurality of sensing conductors P1-P4 to be Grounded (GRD) or floating (floating) through, for example, a switching element 67 to change the electric potential to 1 or 0, but is not limited thereto. In other embodiments, the controller 63 is configured to modulate at least one of the amplitude, frequency and phase of the electric potential of the plurality of sensing conductors P1-P4, so long as a 1 or 0 can be distinguished.
When the object 60 comprises a plurality of sensing conductors (e.g., two of P1-P4), the controller 63 is configured to control the potential of each sensing conductor separately. For example, in FIG. 15A, sense conductors P2 and P4 are at time t 1 -t 4 The potential change of (2) is not the same.
If the capacitive touch device 500 performs near field communication with two sensing conductors by only one detection electrode (e.g., one of Er in fig. 8), the detection electrode is used for detecting the summation of the potentials of the two sensing conductors; that is, the single detection electrode serves as a receiving antenna. In other words, the capacitive touch device 500 stores a variation pattern of the electric potential of the single sensing conductor, which is a sum of the two variation patterns. Similarly, when the object 60 includes more than two sensing conductors, the single detection electrode is also used to detect the potential addition of the more than two sensing conductors.
If the capacitive touch panel 50 includes a plurality of detection electrodes (e.g., er in fig. 8) for performing near field communication with two sensing conductors, the plurality of detection electrodes are used for respectively detecting respective potentials of the two sensing conductors. In other words, the capacitive touch device 500 stores a potential variation pattern of each sensing conductor, as shown in fig. 15A. Similarly, when the object 60 includes more than two sensing conductors, the respective potentials of the more than two sensing conductors may be detected.
As described above, to eliminate the phase difference caused by the capacitance on the signal line, the detection junction is coupled withThe capacitive touch device 500 further includes a detection circuit 53 coupled to the detection electrodes for utilizing two signals S 1 S and S 2 Respectively modulating the detection signals y 2 (t) to generate two detection components I 2 Q and Q 2 . The processing unit 54 is used for detecting the components S according to the two 1 S and S 2 The vector norms are obtained and compared with the predetermined codes to determine whether the object 60 belongs to a predetermined specific object. In other words, in this embodiment, the processing unit 54 identifies the potential change pattern of each sensing conductor (e.g. P1-P4) according to a plurality of vector norms (e.g. see fig. 15A) in addition to determining the touch event (e.g. see fig. 4) by using the vector norms.
The capacitive touch device 500 preferably has a mechanism to enter a near field communication mode from a touch detection mode. As described above, the capacitive touch device 500 can be used as a determination mechanism according to whether the key is pressed or whether the capacitance of the capacitive touch panel 50 is increased. In other embodiments, the capacitive touch device 500 may further use the configuration characteristics of the at least one sensing conductor (e.g., P1-P4) as a determination mechanism. As described above, when the capacitive touch device 500 recognizes at least one of the preset area, the preset potential distribution, the preset arrangement, and/or the preset potential change, the near field communication mode is entered.
In an embodiment, when the near field communication mode is entered, the processing unit 54 may choose to stop according to the detection signal y 2 (t) determining a touch event.
In the near field communication mode, the processing unit 54 is further configured to send a transmission start signal when the identification data (e.g. the synchronization mode of fig. 15A) conforms to a preset code. The object 60 starts transmitting the transmission data after receiving the transmission start signal. For example, FIG. 15B shows two clock frequency bits and a single clock frequency bit of the transmitted data 11,10,00, and 01 (relative to time t 1 ’-t 4 '), but the present invention is not limited thereto. In the present embodiment, the synchronization pattern of fig. 15A is used as identification data, and the number of fig. 15BThe data pattern for example contains transmission data related to the operation of the object 60.
The transmission data is, for example, digital information such as power information, operation mode information, time information, music information, tag information, etc. related to the object 60. In addition, the capacitive touch device 500 may select to display the transmission data on a screen.
In the near field communication mode, the processing unit 54 is further configured to control the capacitive touch panel 50 to output response transmission data through the coupling electric field Ec when the identification data conforms to a predetermined code (e.g. the synchronization pattern of fig. 15A). For example, when the object 60 is an electronic mobile device (e.g., the first capacitive touch device 400 of fig. 7-8) including another capacitive touch panel, the capacitive touch device 500 transmits the Data2 in response thereto; wherein the responsive transmission data may control the operational state (e.g., on/off or sleep) of the object 60, for example. In addition, when the object 60 is the first capacitive touch device 400, the plurality of sensing conductors are, for example, a portion of the driving electrode Ed shown in fig. 8. For example, the sensing conductor P1 of fig. 15A is replaced with the first driving electrode Ed of fig. 8, the sensing conductor P2 is replaced with the third driving electrode Ed of fig. 8, the sensing conductor P3 is replaced with the fifth driving electrode Ed of fig. 8, and so on. In other words, the shape of the plurality of sensing conductors is not limited to a circular shape.
Preferably, the spacing between the plurality of sensing conductors is at least greater than 12mm, but not limited thereto. The spacing may be dependent on the resolution of the capacitive touch panel 50.
The bluetooth pairing procedure between the master device and the slave device is complicated, for example, more than 6 steps may be required, which includes setting the master device and the slave device respectively and completing the pairing within a predetermined time. One embodiment of the capacitive communication system described above may be used to simplify the triggering procedure for bluetooth pairing.
Fig. 19 is a block diagram of bluetooth pairing according to still another embodiment of the invention. The present embodiment is applicable to a bluetooth pairing procedure (Bluetooth pairing procedure) between a master device 73 comprising a capacitive touch panel and a slave device 71 comprising at least one sensing conductor.
In this embodiment, the slave device 71 is, for example, the object 60, which includes at least one sensing conductor 711 (e.g., sensing conductors P1-P4), a controller 713 (e.g., controller 63), and a receiving end 715. The object 60, the at least one sensing conductor P1-P4 and the controller 63 are described above, and thus are not described herein. The receiving terminal 715 receives the device information ID from the host device 73 2 For example address information, which is for example an optical receiver, for example a photodiode, an acoustic receiver, for example a microphone, a capacitive sensing element, for example a capacitive touch pad, or a magnetic induction element, for example a hall sensor, etc., depending on the application.
The main device 73 is, for example, the capacitive touch device 500, and includes a central processor 731 (e.g., the processing unit 54), a capacitive touch panel 733 (e.g., the capacitive touch panel 50), a transmitting end 735, and a bluetooth interface 737. The capacitive touch device 500 and the capacitive touch panel 50 thereof are described above, and thus are not described herein. The transmitting terminal 735 outputs the device information ID of the host device 73 2 Such as a light emitter (e.g. a light emitting diode), a sound generator (e.g. a loudspeaker), a detection electrode (e.g. Ed, er of fig. 8), or a magnetic generating element (e.g. a magnet), etc., depending on the application. The bluetooth interface 737 is used for bluetooth pairing with the slave device 71. The cpu 731 is electrically coupled to the capacitive touch panel 733, the transmitting end 735, and the bluetooth interface 737, and configured to determine whether the slave device 71 is a predetermined specific object, control the transmitting end 735 to send device information ID2 to the slave device 71, and control the bluetooth interface 737 to perform bluetooth pairing.
Referring to fig. 20, in one embodiment, the bluetooth pairing method includes the following steps: sensing at least one sensing conductor by using a capacitive touch panel (step S81); when the capacitive touch panel senses the at least one sensing conductor, a main device identifies a configuration feature of the at least one sensing conductor (step S83); and performing a bluetooth pairing procedure when the master device determines that the configuration feature meets a preset protocol (step S85).
Step S81: as described above, when the slave device 71 approaches the capacitive touch panel 733, the at least one sensing conductor 711 can cause a capacitance change of the capacitive touch panel 733. Accordingly, the master device 73 can determine that the slave device 71 is present near the capacitive touch panel 733.
Step S82: when the master device 73 determines that the capacitive touch panel 733 senses the at least one sensing conductor 711, the master device 73 identifies a configuration feature of the at least one sensing conductor 711.
In one embodiment, the slave device 71 includes a single sense conductor 711, such as one of P1-P4 in FIGS. 13-15A. The configuration features may include at least one of an area, a potential, and a potential variation of the sense conductor (e.g., P1) 711; wherein the electric potential causes, for example, a capacitance change of the capacitive touch panel 733 to reach a preset value; the potential change being for example of the different times t in FIG. 15A 1 -t 4 Potential variation 1 of (2) 1, 0, 1.
In one embodiment, the slave device 71 includes a plurality of sense conductors 711, such as P1-P4 in FIGS. 13-15A. The configuration features may include at least one of a pitch Dp (as shown in fig. 13), an arrangement pattern (e.g., spatially distributed locations and shapes), a potential distribution pattern, and a potential variation pattern (e.g., time potential variation) as shown in fig. 15A and 15B of the plurality of sensing conductors.
Step S85: when the master device 73 determines that the configuration feature accords with a preset configuration between the master device 73 and the slave device 71, directly performing a bluetooth pairing procedure; the bluetooth pairing procedure is already known, and this embodiment is to simplify the triggering procedure of the bluetooth pairing procedure. The user simply completes the bluetooth pairing procedure by placing the slave device 71 (e.g., the object 60) having a predetermined recognizable protocol with the master device 73 within a detectable range of the capacitive touch panel 733, such as the near field communication distance Dc of fig. 9.
Referring to fig. 21, another flowchart of bluetooth pairing between a master device and a slave device according to the present invention includes the following steps: sensing at least one sensing conductor by using a capacitive touch panel (step S81); when the capacitive touch panel senses the at least one sensing conductor, a main device identifies a configuration feature of the at least one sensing conductor (step S83); transmitting device information to a slave device when the master device determines that the configuration feature meets a preset configuration (step S851); and performing a bluetooth pairing procedure when the slave device receives the device information (step S852).
The difference between the present embodiment and fig. 20 is that the slave device 71 in fig. 21 does not directly enter the bluetooth pairing mode before approaching the capacitive touch panel 733, but needs to receive the device information ID of the master device 73 from the master device 73 2 After (e.g., identification information), the bluetooth pairing mode is entered (step S851) to complete the bluetooth pairing procedure (step S852). Steps S81 and S83 are the same as those of fig. 20, and thus are not repeated here.
More specifically, the bluetooth pairing triggering procedure of the present invention can be divided into two types.
In one procedure, the slave device 71 has entered the bluetooth pairing mode before the slave device 71 approaches the capacitive touch panel 733 of the master device 73. Therefore, when the master device 73 determines that the configuration characteristics of the sensing conductors 711 of the slave device 71 conform to the predetermined protocol, the bluetooth pairing procedure is directly performed (as shown in fig. 20).
In another procedure, the slave device 71 does not enter the bluetooth pairing mode before the slave device 71 approaches the capacitive touch panel 733 of the master device 73. Therefore, when the master device 73 determines that the configuration characteristics of the sensing conductors 711 of the slave device 71 have met the predetermined protocol, the master device 73 transmits the device information ID first 2 (e.g., address information) to the slave device 71, and when the slave device 71 receives the device information ID 2 The bluetooth pairing procedure (as shown in fig. 21) is performed only when this is done. In this embodiment, the host device 73 may transmit the device information ID by capacitive sensing, light, sound, or magnetic induction 2 . More specifically, the master device 73 and the slave device 71 also have a configuration for transmitting the device information ID 2 Such as speakers and microphones, light sources and photo sensors, magnetic field generators and hall sensors, etc. For near field communicationTo exchange device information (e.g. ID) of the object (e.g. 71) and the capacitive touch panel (e.g. 73) with each other for Bluetooth communication 1 、ID 2 )
In other embodiments, the slave device 71 also includes a capacitive touch panel to provide the configuration feature to the master device 73 through the capacitive touch panel, in which case the slave device 71 may not need to further provide a sensing conductor for providing the configuration feature, for example, the capacitive touch panel thereof is used as a signal providing source. The slave device 71 can provide configuration features and coding information to the master device 73 through its capacitive touch panel, and receive coding information from the master device 73 through its capacitive touch panel, so that the two devices can be interconnected through near field communication pairing to achieve an out-of-band (out-of-band) pairing function.
It should be noted that, although the above embodiment is described by taking a capacitive touch panel as an example, that is, the driving electrode and the receiving electrode are mutually staggered electrodes and the detecting electrode includes the driving electrode and the receiving electrode, the invention is not limited thereto. In other embodiments, the capacitive touch panel is a self-capacitive touch panel, that is, the driving electrode and the receiving electrode are the same electrode, so the detecting electrode is the driving electrode and the driving electrode.
In summary, in the conventional capacitive touch device, it is only able to determine whether a touch event occurs by detecting the amplitude variation of the signal. Therefore, the present invention also provides a capacitive communication system (fig. 13 and 14) and a bluetooth pairing method (fig. 20-21), which can achieve the object identification and data transmission purposes by using near field communication.
Although the invention has been disclosed by way of the foregoing examples, it is not intended to limit the invention thereto, and various changes and modifications may be made by those skilled in the art to which the invention pertains without departing from the spirit and scope of the invention. The scope of the invention is therefore intended to be defined only by the appended claims.

Claims (6)

1. A mouse, the mouse comprising:
a plurality of sensing conductors, at least one of the plurality of sensing conductors being used as a clock frequency bit and one of the plurality of sensing conductors being used as a positioning bit for identifying a placement direction of the mouse; and
and the controller is coupled with the plurality of sensing conductors and used for modulating the electric potentials of the plurality of sensing conductors as configuration characteristics so as to judge whether the mouse belongs to a specific object or not.
2. The mouse of claim 1, wherein the controller further modulates a plurality of potentials of the plurality of sense conductors at a period to produce a potential variation.
3. The mouse of claim 1, wherein the mouse comprises two sense conductors, the controller further to modulate the potential of each sense conductor separately.
4. The mouse of claim 1, wherein the controller is configured to modulate at least one of amplitude, frequency, and phase of a plurality of potentials of the plurality of sense conductors.
5. A mouse, the mouse comprising:
a plurality of inductive conductors for presenting different potential distributions at different times by modulating their potentials after entering a near field communication mode,
the sensing conductors have preset areas, preset arrangement and preset potential distribution before entering the near field communication mode, so that the mouse and other objects can be distinguished.
6. The mouse of claim 5, wherein the plurality of sensing conductors are further configured to transmit transmission data via near field communication after the mouse receives a transmission start signal.
CN202010721591.7A 2016-06-08 2016-06-08 Mouse with mouse body Active CN111966250B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010721591.7A CN111966250B (en) 2016-06-08 2016-06-08 Mouse with mouse body

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610404744.9A CN107479772B (en) 2016-06-08 2016-06-08 Capacitive communication system and Bluetooth pairing method
CN202010721591.7A CN111966250B (en) 2016-06-08 2016-06-08 Mouse with mouse body

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201610404744.9A Division CN107479772B (en) 2016-06-08 2016-06-08 Capacitive communication system and Bluetooth pairing method

Publications (2)

Publication Number Publication Date
CN111966250A CN111966250A (en) 2020-11-20
CN111966250B true CN111966250B (en) 2024-02-06

Family

ID=60593883

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201610404744.9A Active CN107479772B (en) 2016-06-08 2016-06-08 Capacitive communication system and Bluetooth pairing method
CN202010721591.7A Active CN111966250B (en) 2016-06-08 2016-06-08 Mouse with mouse body

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201610404744.9A Active CN107479772B (en) 2016-06-08 2016-06-08 Capacitive communication system and Bluetooth pairing method

Country Status (1)

Country Link
CN (2) CN107479772B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108966068A (en) * 2018-06-21 2018-12-07 苏州佳世达电通有限公司 Earphone and electronic device engaged therewith
US11051758B2 (en) * 2019-10-03 2021-07-06 Pixart Imaging Inc. Electronic device capable of detecting wearing state or touching state
CN113141174A (en) * 2020-01-16 2021-07-20 原相科技股份有限公司 Touch keyboard capable of reducing noise interference

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488204A (en) * 1992-06-08 1996-01-30 Synaptics, Incorporated Paintbrush stylus for capacitive touch sensor pad
CN2655331Y (en) * 2003-10-22 2004-11-10 仁宝电脑工业股份有限公司 Touch-controlling input device for electronic device
CN1591301A (en) * 2003-08-29 2005-03-09 国誉株式会社 Mouse
CN101859215A (en) * 2009-04-10 2010-10-13 Nec液晶技术株式会社 Touch sensor apparatus and have the electronic equipment of this device
CN201622540U (en) * 2010-04-23 2010-11-03 深圳市迅祥达科技有限公司 Keyboard integrated wireless mouse
CN201716701U (en) * 2010-08-01 2011-01-19 苏州达方电子有限公司 Input system combining mouse and plane sensing device
CN103135797A (en) * 2011-11-28 2013-06-05 西安孔明电子科技有限公司 Touch-type mouse mat mouse device
US8633715B2 (en) * 2006-11-28 2014-01-21 Process Equipment Co. Of Tipp City Proximity detection system
CN104246791A (en) * 2012-03-01 2014-12-24 苹果公司 Electronic device with shared near field communications and sensor structures

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9035919B2 (en) * 2013-03-15 2015-05-19 Microchip Technology Incorporated Electrostatics stylus
CN103440075B (en) * 2013-08-13 2017-03-29 深圳市汇顶科技股份有限公司 A kind of capacitive touch screen terminal and its near field communication method, system
US20150199941A1 (en) * 2014-01-15 2015-07-16 Nokia Corporation 3d touch sensor reader

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488204A (en) * 1992-06-08 1996-01-30 Synaptics, Incorporated Paintbrush stylus for capacitive touch sensor pad
CN1591301A (en) * 2003-08-29 2005-03-09 国誉株式会社 Mouse
CN2655331Y (en) * 2003-10-22 2004-11-10 仁宝电脑工业股份有限公司 Touch-controlling input device for electronic device
US8633715B2 (en) * 2006-11-28 2014-01-21 Process Equipment Co. Of Tipp City Proximity detection system
CN101859215A (en) * 2009-04-10 2010-10-13 Nec液晶技术株式会社 Touch sensor apparatus and have the electronic equipment of this device
CN201622540U (en) * 2010-04-23 2010-11-03 深圳市迅祥达科技有限公司 Keyboard integrated wireless mouse
CN201716701U (en) * 2010-08-01 2011-01-19 苏州达方电子有限公司 Input system combining mouse and plane sensing device
CN103135797A (en) * 2011-11-28 2013-06-05 西安孔明电子科技有限公司 Touch-type mouse mat mouse device
CN104246791A (en) * 2012-03-01 2014-12-24 苹果公司 Electronic device with shared near field communications and sensor structures

Also Published As

Publication number Publication date
CN107479772A (en) 2017-12-15
CN107479772B (en) 2020-08-21
CN111966250A (en) 2020-11-20

Similar Documents

Publication Publication Date Title
TWI547852B (en) Capacitive touch device, capacitive communication device and communication system
US11206057B2 (en) Bluetooth pairing method
US11262858B2 (en) Timing synchronization of active stylus and touch sensor
US11099661B2 (en) Pointer, position detection apparatus and position detection method
US8797301B2 (en) Active stylus to host data transmitting method
CN108268153B (en) Touch sensing system, display device, panel, active pen and pen recognition method
US9658720B2 (en) Capacitive sense array for detecting passive touch objects and an active stylus
US10430005B2 (en) Capacitive touch device and capacitive communication device
US20120068964A1 (en) Capacitive stylus for a touch screen
CN111966250B (en) Mouse with mouse body
US9395824B2 (en) Active pen with improved interference performance
CN105094410B (en) Electronic installation with touch controllable function
Seol et al. A contact-based data communication technique using capacitive touch screen panel and support vector machine classifier
US11481074B1 (en) Method and system for quadrature proximity sensing
Vu et al. Personal touch-identification tokens
KR102168840B1 (en) Apparatus for Sending a Touch Signal and Touch Sensing Apparatus Using the Same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant