WO2020034056A1 - 信号发射方法、信号接收方法及装置 - Google Patents

信号发射方法、信号接收方法及装置 Download PDF

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Publication number
WO2020034056A1
WO2020034056A1 PCT/CN2018/100178 CN2018100178W WO2020034056A1 WO 2020034056 A1 WO2020034056 A1 WO 2020034056A1 CN 2018100178 W CN2018100178 W CN 2018100178W WO 2020034056 A1 WO2020034056 A1 WO 2020034056A1
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WO
WIPO (PCT)
Prior art keywords
signal
pen tip
pen
code signal
information
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Application number
PCT/CN2018/100178
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English (en)
French (fr)
Inventor
蒋宏
张冠军
Original Assignee
深圳市汇顶科技股份有限公司
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 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to EP18907472.7A priority Critical patent/EP3637231B1/en
Priority to PCT/CN2018/100178 priority patent/WO2020034056A1/zh
Priority to CN201880001143.0A priority patent/CN111052051B/zh
Priority to US16/569,622 priority patent/US10838522B2/en
Publication of WO2020034056A1 publication Critical patent/WO2020034056A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
    • 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G06F3/0383—Signal control means within the pointing device
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/038—Indexing scheme relating to G06F3/038
    • G06F2203/0384—Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices
    • 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
    • G06F3/0442—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Definitions

  • the embodiments of the present application relate to touch technology, and in particular, to a signal transmitting method, a signal receiving method, and a device.
  • the touch screen of an electronic device can usually be touched by a finger or by a stylus.
  • the stylus includes an active stylus and a passive stylus.
  • the active stylus is also called an active stylus, which is more and more widely used, and it is developing towards a faster refresh rate and more information transmission trends.
  • the active pen can send the pen tip signal to the touch screen to realize the information transmission between the active pen and the touch screen. At present, there is a certain time interval between each code in the pen tip signal. Therefore, when the coding time is limited, the information that the active pen can transmit to the touch screen is limited.
  • the embodiments of the present application provide a signal transmitting method, a signal receiving method, and a device, so as to increase the amount of information transmitted between the active pen and the touch screen within a limited time.
  • An embodiment of the present application provides a signal transmission method.
  • the method is applied to an active pen.
  • the method includes:
  • the preset phase signal is used to phase-encode the information to be transmitted to obtain an encoded signal; this encoding can be binary encoding or multi-ary encoding.
  • phase is used for multi-ary coding, fewer coding bits can be realized and more information can be transmitted. For example, if hexadecimal encoding is performed for phases 0 °, 90 °, 180 °, and 270 °, 6 bits can transmit 4096-level pressure encoding. Similarly, more phases can be used to encode more bits, which can achieve more Fewer bits carry more information.
  • a pen tip signal is transmitted, the pen tip signal including the encoded signal.
  • An embodiment of the present application may further provide a signal receiving method.
  • the method is applied to an electronic device having a touch screen.
  • the method includes:
  • the nib signal includes: an encoded signal
  • An embodiment of the present application may further provide a signal transmitting device, including:
  • An encoding module configured to phase-encode the information to be transmitted by using a preset phase signal to obtain an encoded signal
  • the transmitting module is configured to transmit a pen tip signal, where the pen tip signal includes the encoded signal.
  • An embodiment of the present application may further provide a signal receiving device, including:
  • An acquisition module configured to acquire a pen tip signal emitted by the active pen; the pen tip signal includes: an encoded signal;
  • a decoding module is configured to perform phase decoding on the encoded signal according to a preset phase signal to obtain transmission information.
  • the signal transmitting method, signal receiving method and device provided in the embodiments of the present application can perform phase encoding on the information to be transmitted through a preset phase signal to obtain an encoded signal, and transmit a pen tip signal including the encoded signal.
  • the encoded signal in the pen tip signal is encoded according to the phase signal.
  • the information can be transmitted continuously in the code time, so that it can transmit more information in the effective coding time. When multiple phases are used for multi-ary encoding, more information can be transmitted with fewer coding bits.
  • FIG. 1A is a first schematic structural diagram of a capacitive touch system applicable to an embodiment of the present application
  • FIG. 1B is a second schematic structural diagram of a capacitive touch system applicable to an embodiment of the present application.
  • 1C is a schematic structural diagram of an AFE circuit in a capacitive touch system applicable to an embodiment of the present application
  • FIG. 2 is a flowchart of a signal transmission method according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a phase signal applied in a signal transmission method according to an embodiment of the present application.
  • FIG. 4 is a flowchart of a signal receiving method according to an embodiment of the present application.
  • FIG. 5 is a diagram illustrating a correspondence between a pen tip signal and a coding frequency according to an embodiment of the present application
  • FIG. 6 is a schematic diagram of a pen tip signal emitted by an active pen according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of demodulation of a beacon code signal in a signal receiving method according to an embodiment of the present application.
  • FIG. 8 is a relationship diagram between a signal sampled by an ADC and a signal of a pen tip in a signal receiving method according to an embodiment of the present application;
  • FIG. 9 is a diagram illustrating a correspondence between demodulation amplitude and time in a signal receiving method according to an embodiment of the present application.
  • FIG. 10 is a diagram illustrating a correspondence between demodulation amplitude and time in a signal receiving method according to an embodiment of the present application.
  • FIG. 11 is a diagram illustrating a correspondence relationship between demodulation amplitude and time in a signal receiving method according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of demodulating encoded information in a signal receiving method according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a signal transmitting device according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a signal receiving device according to an embodiment of the present application.
  • 15 is a schematic structural diagram of an active pen according to an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of an electronic device with a touch screen according to an embodiment of the present application.
  • the signal transmitting method, signal receiving method, and device provided by the following embodiments of the present application can be applied to various capacitance detection fields that require a finger and an active pen, such as a smart phone, a notebook computer, and an active pen with a touch function.
  • a finger and an active pen such as a smart phone, a notebook computer, and an active pen with a touch function.
  • Any electronic device with a touch function such as a wearable device, a home appliance, and a tablet.
  • These electronic devices may have a capacitive touch screen for implementing a touch function based on the capacitance detection technology.
  • FIG. 1A is a first schematic structural diagram of a capacitive touch system applicable to an embodiment of the present application.
  • the capacitive touch system may include a touch screen 1, an active pen 2, a touch chip 3, and a host 4.
  • the touch screen 1 may include a plurality of touch sensors 11, and the plurality of touch sensors 11 includes N transmitting sensors and M receiving sensors.
  • the N transmitting sensors and the M receiving sensors are in a matrix form. Arrange.
  • the N transmitting sensors may be Tx1, Tx2,... TxN shown in FIG. 1.
  • the M receiving sensors may be Rx1, Rx2,... RxM shown in FIG. 1.
  • the plurality of touch sensors 11 are all connected to the touch chip 3.
  • the touch chip 3 is connected to the host 4.
  • the host 4 may be, for example, a central processing unit (CPU) of an electronic device.
  • the capacitive touch system shown in FIG. 1 can support touch with a finger and an active pen at the same time.
  • the touch chip 3 can recognize the position of the finger on the touch screen 1 by detecting the mutual capacitance and self-capacitance between the finger and the touch sensor 11 at the corresponding position.
  • a coupling capacitance is formed between the pen tip of the active pen 2 and the touch sensor 11 at a corresponding position.
  • the active pen 2 codes the information to be transmitted, and transmits the coding signal or the pen tip signal to the touch chip 3 through a coupling capacitor between the pen tip of the active pen 2 and the touch sensor 11.
  • the touch chip 3 can obtain the transmission information of the active pen 2 by identifying the coded signal received by the touch sensor 11 and demodulating the coded signal. In another example, the touch chip 3 can transmit the coded signal to the host 4, and the host 4 demodulates the coded signal to obtain the transmission information of the active pen 2. In another example, the touch chip 3 can be combined with the host 4 to demodulate the coded signal to obtain the transmission information of the active pen 2. For example, the touch chip 3 may determine part of the information of the active pen 2, and the host 4 determines other information of the active pen 2.
  • FIG. 1B is a second schematic structural diagram of a capacitive touch system applicable to an embodiment of the present application.
  • the capacitive touch system is based on the above FIG. 1A, wherein the touch chip 3 may include a plurality of analog front-end (AFE) circuits 31 and an analog-to-digital converter (Analog). -to-Digital Converter (ADC) 32 and digital processing module 33.
  • AFE analog front-end
  • ADC analog-to-Digital Converter
  • each AFE circuit 31 can be connected to one touch sensor 11.
  • the pen tip signal of the active pen 2 can be coupled to the AFE circuit 31 connected to the touch sensor 11 through the coupling capacitance of the pen tip and the corresponding touch sensor 11, and the pen tip signal is amplified and / or filtered by the AFE circuit 31 .
  • Each AFE circuit 31 is also connected to the ADC 32 to transmit the nib signal processed by each AFE circuit 31 to the ADC 32, so that the nib signal processed by each AFE circuit 31 is collected by the ADC
  • the ADC 32 converts the collected signal into a digital signal and transmits it to the digital processing module 33, so that the digital processing module 33 determines the transmission information of the active pen 2 according to the converted digital signal, and transmits the result to the host 4.
  • the touch chip 3 may not include a digital processing module 33, and the ADC 32 may convert the collected signal into a digital signal and transmit it to the host computer 4, and the host computer 4 may determine the active pen 2 based on the converted digital signal. Transmission information.
  • FIG. 1C is a schematic structural diagram of an AFE circuit in a capacitive touch system applicable to an embodiment of the present application.
  • each AFE circuit 31 shown in the above FIG. 1B may include: a programmable gain amplifier (Programmable Gain Amplifier (PGA)) 311 and an analog anti-aliasing filter (AAF) 312 .
  • the input terminal of the PGA 311 is connected to a touch sensor 11, which can be a transmitting sensor or a receiving sensor.
  • the output of PGA311 is also connected to AAF312.
  • AAF312 is also connected to ADC32.
  • PGA 311 can amplify the pen tip signal of the active pen 2 coupled to it, for example, adjust the amplitude of the pen tip signal to a preset amplitude to achieve the amplitude amplification.
  • AAF 312 can filter out the interference other than the preset coding frequency in the signal processed by PGA 312, and then transmit it to ADC 32, so that the signal collected by ADC 32 is a valid signal in the pen tip signal.
  • FIG. 2 is a flowchart of a signal transmission method according to an embodiment of the present application. This signal transmission method can be implemented by the active pen 2 in any of the touch systems described above. As shown in FIG. 2, the signal transmission method may include the following:
  • S201 Perform phase encoding on the information to be transmitted by using a preset phase signal to obtain an encoded signal.
  • the active pen 2 can acquire the information to be transmitted in a case of being in contact with the touch screen 1, and then execute S201.
  • the information to be transmitted may be a digital signal.
  • the preset phase signal may be, for example, an analog phase signal, and may be any type of analog phase signal such as a sine wave signal, a cosine wave signal, and a triangle wave signal.
  • the preset phase signal is used to phase encode the information to be transmitted, and the obtained encoded signal can be an analog signal.
  • different multi-ary encodings may use different phase signals for phase encoding.
  • the different phase signals may be, for example, multiple signals with different starting phases.
  • the N-coded numbers "0", “1” to “N-1" may be phase-coded with a sine wave signal having a starting phase difference of 360 / N, respectively.
  • the information to be transmitted is a binary code
  • the binary number “0” and the binary number “1” are respectively phase-coded by using a sine wave signal with an initial phase difference of 180 °.
  • the quaternion numbers "0", “1”, “2”, and “3” use sinusoids with initial phase differences of 0 °, 90 °, 180 °, and 270 °, respectively.
  • the wave signal is phase-encoded.
  • phase signals are used to encode more digits, and more information can be transmitted with fewer bits.
  • FIG. 3 is a schematic diagram of a phase signal used for binary coding according to an embodiment of the present application.
  • the first phase signal and the second phase signal may be, for example, sinusoidal signals with an initial phase difference of 180 °.
  • FIG. 3 is only one possible example of a phase signal used for phase encoding, and the initial phase difference between the first phase signal and the second phase signal may also be other values, and details are not described herein again.
  • the active pen after acquiring the binary code of the information to be transmitted, can use the first phase signal shown in FIG. 3 to perform phase coding on the binary number “0” in the binary code.
  • the second phase signal shown in FIG. 3 in the binary encoding, the binary number “1” is subjected to phase encoding to obtain the encoded signal.
  • the active pen may use the second phase signal shown in FIG. 3 to perform phase encoding on the binary number “0” in the binary encoding;
  • the first phase signal shown in FIG. 3 in the binary coding, the binary number “1” is phase-coded, and then the coded signal is obtained.
  • the information to be transmitted by the active pen may include information such as pen tip pressure information of the active pen and / or function key pressing information of the active pen.
  • the encoded signal can be obtained after executing the above S201, and the pen tip signal is obtained according to the encoded signal, so that the pen tip signal includes the encoded signal.
  • the pen tip signal can be obtained directly from the encoded signal, and the pen tip signal can also be obtained from the encoded signal and other signals.
  • the pen tip signal may also be referred to as a pen tip coding signal or a coding signal.
  • the active pen When the active pen acquires the pen tip signal, it can couple the pen tip signal to the touch chip through the coupling capacitance between the pen tip and the touch sensor on the touch screen when it is in contact with the touch screen of the electronic device. Emission of the nib signal.
  • phase encoding of the information to be transmitted can be performed by using a preset phase signal to obtain an encoded signal, and a pen tip signal including the encoded signal is transmitted.
  • the encoded signal in the pen tip signal is encoded according to the phase signal.
  • phase signals of the information to be transmitted can be encoded with different phase signals, so that more information can be transmitted with less binary bits.
  • the embodiment of the present application may further provide a signal receiving method.
  • the signal receiving method can be applied to an electronic device with a touch screen.
  • the electronic device with a touch screen may include at least the touch screen 1, the touch chip 3, and the host 4 in the touch system described in any one of FIG. 1A to FIG. 1C.
  • the electronic device may further include other components, and details are not described herein again.
  • FIG. 4 is a flowchart of a signal receiving method according to an embodiment of the present application.
  • the signal receiving method may be implemented by an electronic device through software and / or hardware. As shown in FIG. 4, the signal receiving method may include the following:
  • the pen tip signal includes: a coded signal.
  • the S401 can obtain the nib signal emitted by the active pen through the coupling capacitance between the touch sensor on the touch screen and the pen tip of the active pen.
  • S402. Perform phase decoding on the encoded signal according to a preset phase signal to obtain transmission information.
  • the electronic device side is also called a screen terminal, and the preset phase signal used may be the same as the active pen side and also called a pen terminal.
  • the phase signal used is the same.
  • the pen tip signal transmitted by the active pen may be an analog signal
  • the encoded signal may be an analog encoded signal.
  • phase decoding By performing phase decoding on the encoded signal, encoding information of the transmission information can be obtained, such as multi-ary encoding of the transmission information.
  • each code of the received signal can be phase demodulated, and the coded signal can be decoded according to a preset correspondence between the phase and the code.
  • binary coding is used as an example for description.
  • the phase 180 ° corresponds to the binary number “1”.
  • phase decoding can be performed by the touch chip of the electronic device, and the phase decoding can also be performed by the host of the electronic device. That is, S402 may be executed by a touch chip of an electronic device, and may also be executed by a host of the electronic device.
  • the electronic device After the electronic device obtains the transmission information, it can perform a corresponding touch operation according to the transmission information.
  • the transmission information may include: pen tip pressure information of the active pen and / or function key pressing information of the active pen, and the like.
  • the electronic device After the electronic device obtains the transmission information by executing S402, it can also determine the pen tip pressure information of the active pen and / or the function key pressing information of the active pen, etc. based on the transmission information, and then according to the pen tip pressure information of the active pen and / or The active pen's function key press information and the like perform corresponding touch operations.
  • a pen tip signal emitted by an active pen may be obtained.
  • the pen tip signal includes an encoded signal, and the encoded signal is phase-decoded according to a preset phase signal to obtain transmission information.
  • the encoded signal in the pen tip signal is encoded according to the phase signal. There is no need to set a time interval between different information in the encoded signal. Therefore, the time occupied by the invalid signal of the pen tip signal is reduced, and the active pen is playing.
  • the information can be transmitted continuously in the code time, so that it can transmit more information in the effective coding time, and when multiple phases are used for multi-ary encoding, more information can be transmitted with fewer coding bits.
  • the method may further include:
  • the beacon code signal is used to determine a touch position of the active pen on the touch screen.
  • the preset beacon code signal may be a preset waveform signal, such as a preset sine wave signal.
  • the beacon code signal may include a first beacon code signal and / or a second beacon code signal.
  • the first beacon code signal and the second beacon code may be the same preset waveform signal or different waveform signals.
  • the first beacon code signal may be referred to as a head code signal and may be located in front of the encoded signal in the pen tip signal; the second beacon code signal may be referred to as a tail code signal and may be located in the pen tip signal. Behind the signal.
  • obtaining the pen tip signal according to the encoded signal and a preset beacon code signal in the above method may include:
  • the pen tip signal is obtained according to the encoded signal, a preset beacon code signal, and a space code signal.
  • the null code signal is used to determine a start time or an end time of the beacon code signal, and then perform timing synchronization between the pen tip signal and the touch screen.
  • the electronic device needs to perform timing synchronization after acquiring the pen tip signal sent by the active pen.
  • the active pen may include the null code signal in the pen tip signal transmitted. After the electronic device determines the start time or end time of the beacon code signal according to the null code signal, and then performs timing synchronization between the active pen and the touch screen, it can more accurately determine the start time of coding of the active pen, and The position of different encoded signals in the pen tip signal can also be accurately identified.
  • Empty code signal, Gu Mingsiyi empty coded signal, that is, the active pen within the empty code signal does not transmit any signal, no coding.
  • the electronic device can also perform operations such as finger touch recognition.
  • the information to be transmitted may include: the information to be transmitted of the active pen and a preset check code.
  • the check code can be used to check the information to be transmitted of the active pen, and exclude decoding error information caused by factors such as interference.
  • the check code can be located at a preset fixed position in the pen tip signal.
  • the check code can be a fixed check code or a variable check code.
  • the check code is a fixed check code
  • the check code may be a preset binary number "0" or "1".
  • the check code may be determined according to the information to be transmitted of the active pen, which may follow the information of the active pen to be transmitted, such as pressure information and / or key information. Change changes.
  • the check code may be, for example, a parity check code determined according to the information to be transmitted of the active pen.
  • the electronic device After obtaining the pen tip signal, the electronic device performs phase decoding on the encoded signal according to a preset phase signal to obtain transmission information of the active pen and the check code, and according to the check code, The information is transmitted for verification. If the verification is passed, the electronic device may perform a corresponding touch operation according to the transmission information of the active pen.
  • the method can also combine a check code to eliminate erroneous decoding and reduce the false alarm rate.
  • transmitting the pen tip signal in the above S202 may include:
  • the pen tip signal is transmitted using multiple coding frequency interaction modes.
  • the active pen can transmit the pen tip signal within at least one period corresponding to the first coding frequency and at least one corresponding to the second coding frequency. During the period, the pen tip signal is transmitted.
  • the multiple coding frequencies can be used to decode the obtained pen tip signal, and then the electronic device can obtain transmission information in the pen tip signal, such as pen tip pressure information. And / or the function key press information, in this case, the pressure and / or key information of the electronic device and the refresh rate of the coordinate information can be kept unchanged.
  • the electronic device detects that the interference of one of the multiple coding frequencies is large, the pen tip signal corresponding to the coding frequency can be discarded, the refresh rate of the electronic device can be reduced, and the anti-interference ability can be improved.
  • the pen tip signal is transmitted by using multiple coding frequency interaction modes, which can effectively improve the anti-interference ability of the electronic device.
  • FIG. 5 is a diagram illustrating a correspondence between a pen tip signal and a coding frequency according to an embodiment of the present application.
  • the active pen can transmit the pen tip signal during at least one period corresponding to the coding frequency A, and can transmit the pen tip signal during at least one period corresponding to the coding frequency B.
  • the electronic device When the electronic device detects that there is no interference between the coding frequency A and the coding frequency B, the coding frequency A and the coding frequency B can be used to decode the obtained pen tip signal. In this case, the electronic device's The refresh rate of pressure and / or key information and coordinate information is unchanged.
  • the electronic device When the electronic device detects that the interference between one of the coding frequencies A and B is large, it can discard the pen tip signal corresponding to the coding frequency, which can reduce the refresh rate of the touch screen to the original refresh rate. 1/2, improve anti-interference ability.
  • FIG. 6 is a schematic diagram of a pen tip signal emitted by an active pen according to an embodiment of the present application.
  • the pen tip signal transmitted by the active pen may include: W head code signals, X encoding and check code signals, Y tail code signals, and Z space code signals.
  • each code length t is T / (W + X + Y + Z).
  • the W head code signals and Y tail code signals can be used to enable the electronic device to synchronize the screen end and the pen end, and determine the touch position of the pen tip of the active pen on the touch screen, such as the coordinate position.
  • the X coded signals may include a pressure code signal and / or a key code signal.
  • the pressure code signal may be used to transmit pressure information of a pen tip of the active pen
  • the key code signal may be used to transmit function key pressing information of the active pen.
  • the X coded signals may include at least 12 pressure code signals. Using quaternary coding, only the X coded signals are 6 pressure code signals shall be included to transmit the pressure information.
  • the X coded signals may include at least one check code signal, and the at least one check code signal may be located at a preset fixed position of the coded signal.
  • the at least one verification code signal may be used to enable the electronic device to verify information such as a pressure code signal and / or a key code signal in the received pen tip signal, so as to verify the pressure code signal and the pen tip signal. Whether the information such as the key code signal is accurate.
  • the check code signal may be a coded signal with a preset fixed position in the pen tip signal. If the check code signal is a variable check code signal, the check code signal may be, for example, a check code signal determined according to information such as the pressure code signal and / or a key code signal, such as a parity check signal. ).
  • the active pen does not code, that is, it does not transmit signals, which enables the electronic device to perform touch detection of the finger and the like.
  • the relative positions and types of the pen tip signals, head code signals, tail code signals, coded signals, and space code signals shown in FIG. 6 are only one possible example, and can also be shown in FIG. 6 s difference.
  • the X encoded signals in the pen tip signal may be encoded signals obtained by performing phase encoding according to a preset phase signal.
  • different phase signals can be used for coding.
  • the encoded signal in the pen tip signal is encoded according to the phase signal. There is no need to set a time interval between different information in the encoded signal. Therefore, the time occupied by the invalid signal of the pen tip signal is reduced, and the active pen is playing.
  • the information can be transmitted continuously in the code time, so that it can transmit more information in the effective coding time. When multiple phases are used for multi-ary encoding, more information can be transmitted with fewer coding bits.
  • the pen tip signal obtained by executing S401 may include an encoded signal and a preset beacon code signal.
  • the method may further include:
  • a touch position of the active pen on the touch screen is determined.
  • the electronic device After acquiring the pen tip signal, the electronic device can determine the touch position of the active pen on the touch screen according to the beacon code signal in the pen tip signal, which is also called touch coordinates or coordinate position.
  • the touch position of the active pen on the touch screen may be the positions of the transmitting sensor and the receiving sensor where the pen tip of the active pen is located on the touch screen.
  • determining the touch position of the active pen on the touch screen according to the beacon code signal may include:
  • a touch position of the active pen on the touch screen is determined.
  • the beacon code signal includes: a first beacon code signal and / or a second beacon code signal; wherein the first beacon code signal is located in the pen tip signal, in front of the coded signal; the first The two beacon code signals are located in the pen tip signal, behind the coded signal.
  • the beacon code signal may be IQ demodulated to obtain the first demodulation amplitude. If the demodulation amplitude is greater than or equal to a preset value, it is determined that the active pen is in the Touch position on the touch screen.
  • the first demodulation amplitude is an amplitude that can be a beacon code signal.
  • the electronic device can demodulate the first beacon code signal, and can also demodulate the second beacon code signal, and can also stitch the first beacon code signal with the second beacon code signal. Then demodulate.
  • FIG. 7 is a schematic diagram of demodulation of a beacon code signal in a signal receiving method according to an embodiment of the present application. It is assumed that in each coding period T, the pen tip signals obtained by the electronic device include: W head code signals, X code signals and check code signals, Y tail code signals, and Z null code signals.
  • the electronic device may determine the head code amplitude by performing IQ analysis on the head code signal, and determine the coordinate position of the pen tip of the active pen on the touch screen according to the head code amplitude.
  • the electronic device may determine the tail code amplitude by performing IQ analysis on the tail code signal, and determine the coordinate position of the pen tip of the active pen on the touch screen according to the tail code amplitude.
  • the electronic device may splice the head code signal and the tail code signal, and perform IQ analysis on the spliced signal to obtain the amplitudes of the head code and the tail code, and according to the amplitudes of the head code and the tail code. Determine the coordinate position of the pen tip of the active pen on the touch screen.
  • the pen tip signal further includes a null code signal.
  • the signal receiving method may further include:
  • the pen tip signal and the touch screen are synchronized in time.
  • determining a start time or an end time of the beacon code signal according to the null code signal may include:
  • a start time or an end time of the beacon code signal is determined.
  • the second demodulation amplitude may be an amplitude of a signal of a preset code for a long time including the null code signal.
  • the signal of the preset code for a long time including the null code signal may be referred to as a signal of a null code attachment in the pen tip signal.
  • the electronic device may further determine an amplitude change within the preset time according to the second demodulation amplitude, and determine the start time or end time of the beacon code signal according to the amplitude change. . For example, if the amplitude change within the preset time is the amplitude decrease, the end time of the beacon code, that is, the end time of the last code signal may be determined; if the amplitude change within the preset time is the amplitude increase, then the The start time of the beacon code, such as the start time of the head code.
  • FIG. 8 is a relationship diagram between a signal sampled by an ADC and a signal of a pen tip in a signal receiving method according to an embodiment of the present application.
  • the ADC in electronic equipment can collect the signals output by all touch sensors on the touch screen, such as the AFE circuit connected to all the receiving sensors.
  • the pen tip signal can be ADC acquisition.
  • the duration of each signal acquired by the ADC is a preset pen tip signal period T, also referred to as the period T.
  • the signal collected by the ADC may be aligned with the pen tip signal emitted by the active pen.
  • the signals collected by the ADC may include: a complete tail code signal, a complete coded signal, a complete space code signal, and a small number of head code signals.
  • the signals collected by the ADC may include: a complete tail code signal, a complete space code signal, a complete head code signal, and a part of the encoded signal.
  • the signal collected by the ADC may include a part of the tail code signal, a complete space code signal, a complete head code signal, and a part of the encoded signal.
  • the signal collected by the ADC may include: part of the null code signal, such as a 1/2 null code signal, a complete head code signal, a complete coded signal, a complete end code signal, and a 1/2 space in the next cycle. Code signal.
  • the five situations described above can be divided into two categories: 1. complete empty code signal, complete end code signal and / or complete head code signal; 2.1 / 2 empty code signal, complete head code signal, and / Or end code signal.
  • the pen tip signal collected by the ADC may not be aligned with the pen tip signal emitted by the active pen, there is any of the scenarios 2 to 5 shown in FIG. 8 above. Therefore, it is necessary to determine the head code in the collected pen tip signal. The start time of the signal or the end time of the end code signal, and then the timing of the collected pen tip signal is synchronized.
  • FIG. 9 is a diagram illustrating a correspondence between demodulation amplitude and time in a signal receiving method according to an embodiment of the present application.
  • the pen tip signals obtained by the electronic device include: W head code signals 0, X code signals and check code signals, Y tail code signals, and Z space code signals.
  • the electronic device can perform IQ demodulation on the signal within the preset demodulation duration to obtain the demodulation amplitude.
  • the demodulation duration may be a duration of M code lengths.
  • the demodulation amplitude is the maximum value M * A and remains unchanged.
  • A is the demodulation amplitude within a single code length.
  • the demodulation time period there are some continuous signals.
  • the demodulation amplitude decreases with the length of the space code signal.
  • the encoding phase is mistakenly identified as the empty code phase.
  • M can be odd and empty If the amplitude detected in the code signal is 0 and kept for a period of time, no misidentification will occur.
  • the demodulation amplitude M * A can be a tail code signal or a head code signal, and the demodulation amplitude 0 is a null code signal. According to the demodulation amplitude change from M * A to 0, the end time of the tail code signal can be determined; according to the demodulation amplitude change from 0 to M * A, the start time of the head code signal can be determined.
  • FIG. 10 is a diagram illustrating a correspondence relationship between demodulation amplitude and time in a signal receiving method according to an embodiment of the present application. Assuming that the position of the start time of the head code signal or the end time of the end code signal in the nib signal collected by the ADC can be obtained by the method shown in FIG. 9 above, it can be determined that the nib signal collected by the ADC is relative to the ideal ADC Time offset between acquired signals.
  • the ideal ADC acquisition signal can be a pen tip signal emitted by an active pen.
  • the end time of the end code signal is detected and the position of the nib signal collected by the ADC is t1
  • the time deviation between the nib signal collected by the ADC and the ideal nib signal can be determined, and the sampling start time of the ADC can be determined Move t0-t1 forward to achieve timing synchronization of the nib signal collected by the ADC.
  • the start of the head code signal is at position 0 in the nib signal sampled by the ADC.
  • the start of the head code signal is detected at the position of the nib signal sampled by the ADC at t2
  • the nib sampled by the ADC can be determined.
  • the time difference between the signal and the ideal pen tip signal can be moved forward by T-t2 for the ADC's sampling start time to achieve the timing synchronization of the pen tip signal collected by the ADC.
  • the data of each AFE circuit can be collected by the ADC, and the acquisition time of each AFE circuit can be a preset period T.
  • the ADC After the ADC receives the pen tip signal transmitted by the AFE circuit, the ADC can transmit the pen tip signal to the touch chip, and the touch chip performs phase decoding on the pen tip signal to determine the touch position of the pen tip on the touch screen. And transmission information in the pen tip signal, such as pen tip pressure information and / or function key information.
  • transmission information can be obtained by performing S402 in the above signal receiving method, and the transmission information may include transmission information of the active pen and a preset check code.
  • the transmission information of the active pen may include: pen tip pressure information and / or function key information.
  • check code For a description of the check code, refer to the foregoing description, and details are not described herein again.
  • the signal receiving method may further include:
  • the transmission information of the active pen is checked.
  • the check passes, it can be determined that the comparison signal is received, and the transmission information of the active pen is accurately decoded, and then the transmission information of the active pen is reported, that is, the reporting point. If the check fails, it can be determined that the comparison signal is received, the transmission information of the active pen is not decoded accurately, and the pen tip signal obtained during this period can be discarded.
  • FIG. 11 is a diagram of a correspondence relationship between demodulation amplitude and time in a signal receiving method according to an embodiment of the present application.
  • the electronic device may use IQ demodulation to demodulate a head code signal and / or a tail code signal in a pen tip signal, determine a demodulation amplitude, and determine a pen tip of the active pen according to the demodulation amplitude.
  • the coordinate position of the touch screen such as the position of the touch sensor corresponding to the touch screen where the pen tip is located.
  • the demodulation amplitude is greater than or equal to a preset value, the coordinate position of the pen tip of the active pen on the touch screen can be determined.
  • the electronic device also demodulates the coded signal in the pen tip signal to determine the phase of each coded signal in the coded signal, and then determines the code corresponding to the coded signal according to the preset correspondence between the phase and the code, also known as the coding sequence. , And then the transmission information, that is, the pen tip pressure information and / or the function key pressing information, etc. may be determined according to the coding corresponding to the coding signal. At the same time, it is also judged whether the pen tip signal collected in this period T is correct according to the check code.
  • performing phase decoding on the encoded signal according to a preset phase signal in S402 to obtain transmission information includes:
  • phase information of each numbered signal is analyzed according to a preset phase signal, and the encoding of each encoded signal is determined.
  • performing phase decoding on the encoded signal according to a preset phase signal in S402 to obtain transmission information includes:
  • the splicing signal is analyzed according to a preset phase signal to determine the encoding of each encoded signal; the transmission information includes: the encoding of at least one encoded signal in the pen tip signal.
  • each coded signal and the beacon code signal increases the equivalent coding time and the equivalent coding voltage, which can effectively improve the anti-interference ability of signal analysis.
  • FIG. 12 is a schematic diagram of demodulating encoded information in a signal receiving method according to an embodiment of the present application.
  • the number of coded signals is large, because the single code length is usually short, when using IQ demodulation, the anti-interference ability is poor when parsing the coded information.
  • multiple coded signals can be spliced and then IQ demodulated, which can effectively improve the anti-interference ability.
  • Fig. 13 for binary coding, when two phase signals with a starting phase difference of 180 ° are used to decode the binary numbers "0" and "1”, the same phase signal can be used for the head code signal and the tail code signal. For example, if it is "0", the head code signal can be used for IQ demodulation to determine the demodulation amplitude, and then the coordinate position of the pen tip of the active pen on the touch screen can be determined.
  • the demodulation phase may not be performed by using the IQ demodulation method for each coded signal shown in FIG. 11, and each coded signal and the head code signal are stitched together.
  • the following W + 1 code signals are IQ demodulated. If the value obtained by demodulating a single code length signal IQ is A, then the value obtained by demodulating a head code signal IQ is W * A.
  • FIG. 13 is a schematic structural diagram of a signal transmitting device according to an embodiment of the present application. As shown in FIG. 13, the signal transmitting device 130 may include:
  • the encoding module 131 is configured to perform phase encoding on the information to be transmitted by using a preset phase signal to obtain an encoded signal.
  • the transmitting module 132 is configured to transmit a pen tip signal, where the pen tip signal includes the encoded signal.
  • the signal transmitting module 130 may further include:
  • a generating module configured to obtain the pen tip signal according to the encoded signal and a preset beacon code signal
  • the beacon code signal is used to determine a touch position of the active pen on the touch screen.
  • the generating module is specifically configured to obtain the pen tip signal according to the encoded signal, a preset beacon code signal, and a space code signal.
  • the null code signal is used to determine a start time or an end time of the beacon code signal, and then perform timing synchronization between the pen tip signal and the touch screen.
  • the beacon code signal includes a first beacon code signal and / or a second beacon code signal.
  • the first beacon code signal is located in the pen tip signal and is in front of the coded signal; the second beacon code signal is located in the pen tip signal and is behind the coded signal.
  • the information to be transmitted includes: the information to be transmitted of the active pen and a preset check code;
  • the check code is used for checking the information to be transmitted of the active pen.
  • the information to be transmitted by the active pen includes: tip pressure information of the active pen and / or function key pressing information of the active pen.
  • the signal transmitting device provided in the embodiment of the present application can execute the signal transmitting method performed by the active pen provided in any of the foregoing embodiments.
  • the active pen provided in any of the foregoing embodiments.
  • FIG. 14 is a schematic structural diagram of a signal receiving device according to an embodiment of the present application. As shown in FIG. 14, the signal receiving device 140 may include:
  • the obtaining module 141 is configured to obtain a pen tip signal emitted by the active pen.
  • the pen tip signal includes: an encoded signal.
  • the decoding module 142 is configured to perform phase decoding on the encoded signal according to a preset phase signal to obtain transmission information.
  • the pen tip signal further includes a preset beacon code signal.
  • the signal receiving device 140 may further include:
  • a first determining module is configured to determine a touch position of the active pen on the touch screen according to the beacon code signal.
  • the first determining module is specifically configured to perform IQ demodulation on the beacon code signal to obtain a first demodulation amplitude, and determine a touch of the active pen on the touch screen according to the first demodulation amplitude. ⁇ ⁇ Control position.
  • the pen tip signal further includes a null code signal.
  • the signal receiving device 140 may further include:
  • a second determining module configured to determine a start time or an end time of the beacon code signal according to the null code signal
  • a synchronization module is configured to perform timing synchronization between the pen tip signal and the touch screen according to a start time or an end time of the beacon code signal.
  • a second determining module is specifically configured to perform IQ demodulation on the signal of the pen tip, including a preset code for a long time, to obtain a second demodulation amplitude; according to the second The demodulation amplitude determines the start time or end time of the beacon code signal.
  • the decoding module 142 is specifically used for the nib signal, which can perform IQ demodulation on each coded signal separately, demodulate phase information, and analyze the phase of each coded signal according to a preset phase signal.
  • the information determines the encoding of each encoded signal.
  • the encoding of the transmission information includes: encoding of at least one encoded signal in the pen tip signal.
  • the decoding module 142 is specifically configured to splice each coded signal with the beacon code signal to obtain a spliced signal, and analyze the spliced signal according to a preset phase signal. Determine the encoding of each encoded signal; the encoding of the transmission information includes: encoding of at least one encoded signal in the pen tip signal.
  • the beacon code signal includes: a first beacon code signal and / or a second beacon code signal;
  • the first beacon code signal is located in the pen tip signal and is in front of the coded signal; the second beacon code signal is located in the pen tip signal and is behind the coded signal.
  • the encoding of the transmission information includes: an encoding of the transmission information of the active pen and a preset check code.
  • the signal receiving device 140 may further include:
  • the verification module is configured to verify the encoding of the transmission information of the active pen according to the verification code.
  • the transmission information of the active pen includes: tip pressure information of the active pen and / or function key pressing information of the active pen.
  • the signal receiving apparatus provided in the embodiment of the present application can execute the signal receiving method performed by the electronic device provided in any of the foregoing embodiments.
  • the electronic device provided in any of the foregoing embodiments.
  • FIG. 15 is a schematic structural diagram of an active pen according to an embodiment of the present application.
  • the active pen 150 may include a memory 151 and a processor 152.
  • the memory 151 is coupled with the processor 152.
  • the memory 151 is configured to store a program instruction.
  • the processor 152 is configured to call a program instruction stored in the memory, so that the active pen executes any one of the signal transmitting methods described above.
  • An embodiment of the present application may further provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by the processor 152, the signal transmission method described above is implemented.
  • the active pen and the computer-readable storage medium provided in the embodiments of the present application can execute the signal transmission method performed by the active pen provided in any of the foregoing embodiments.
  • FIG. 16 is a schematic structural diagram of an electronic device with a touch screen according to an embodiment of the present application.
  • the electronic device 160 having a touch screen may include a memory 161 and a processor 162.
  • the memory 161 is coupled with the processor 162.
  • the memory 161 is configured to store a program instruction.
  • the processor 162 is configured to call a program instruction stored in the memory, so that the electronic device 160 having a touch screen executes any one of the signal receiving methods described above.
  • An embodiment of the present application may further provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by the processor 162, the signal receiving method described above is implemented.
  • An electronic device with a touch screen and a computer-readable storage medium provided in the embodiments of the present application can execute a signal receiving method performed by the electronic device provided in any of the foregoing embodiments.
  • a signal receiving method performed by the electronic device provided in any of the foregoing embodiments.
  • the foregoing program may be stored in a computer-readable storage medium.
  • the program is executed, the program is executed.
  • the method includes the steps of the foregoing method embodiment; and the foregoing storage medium includes: a ROM, a RAM, a magnetic disk, or an optical disc, which can store various program codes.

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Abstract

本申请提供一种信号发射方法、信号接收方法及装置，其中，信号发射方法应用于主动笔，可包括：采用预设的相位信号对待传输信息进行相位编码，得到编码信号；发射笔尖信号，所述笔尖信号包括所述编码信号。本申请可提高有限时间内主动笔与触控屏间的传输信息量。

Description

信号发射方法、信号接收方法及装置 技术领域
本申请实施例涉及触控技术，尤其涉及一种信号发射方法、信号接收方法及装置。
背景技术
随着触控技术的发展，越来越多的电子设备可通过触控技术实现人机交互。
电子设备的触控屏通常可通过手指进行触控，也可通过触控笔进行。触控笔包括主动触控笔和被动触控笔，其中，主动触控笔也称主动笔，应用越来越广泛，且向着更快的刷新率、更多的信息传输趋势发展。主动笔可通过向触控屏发送笔尖信号，实现主动笔与触控屏间的信息传输。目前，该笔尖信号中，每个编码之间具有一定的时间间隔。因而在打码时间有限的情况下，主动笔能够传输至触控屏的信息受限。
发明内容
本申请实施例提供一种信号发射方法、信号接收方法及装置，以提高有限时间内主动笔与触控屏间的传输信息量。
本申请实施例提供一种信号发射方法，所述方法应用于主动笔，所述方法包括：
采用预设的相位信号对待传输信息进行相位编码，得到编码信号；此编码可为二进制编码，也可为多进制编码。采用相位进行多进制编码时，可实现更少的编码位数，传输更多的信息。如相位0°、90°、180°和270°实行4进制编码，则6个位即可传输4096级压力编码；同理，采用更多的相位进行更多位的编码，则可实现更少的位传输更多的信息。
发射笔尖信号，所述笔尖信号包括所述编码信号。
本申请实施例还可提供一种信号接收方法，所述方法应用于具有触控屏的电子设备，所述方法包括：
获取主动笔发射的笔尖信号；所述笔尖信号包括：编码信号；
根据预设的相位信号，对所述编码信号进行相位解码，得到传输信息。
本申请实施例还可提供一种信号发射装置，包括：
编码模块，用于采用预设的相位信号对待传输信息进行相位编码，得到编码信号；
发射模块，用于发射笔尖信号，所述笔尖信号包括所述编码信号。
本申请实施例还可提供一种信号接收装置，包括：
获取模块，用于获取主动笔发射的笔尖信号；所述笔尖信号包括：编码信号；
解码模块，用于根据预设的相位信号，对所述编码信号进行相位解码，得到传输信息。
本申请实施例提供的信号发射方法、信号接收方法及装置，可通过预设的相位信号对待传输信息进行相位编码，得到编码信号，并发射包括该编码信号的笔尖信号。由于该方法中，笔尖信号中的编码信号是根据相位信号进行编码的，该编码信号中不同信息之间无需设置时间间隔，因而，减少了笔尖信号无效信号所占用的时间，使得主动笔在打码时间内可连续传输信息，使其在有效打码时间内传输更多的信息；并采用多个相位进行多进制编码时，更可实现更少的编码位传输更多的信息。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1A为本申请实施例所适用的一种电容触控系统的结构示意图一；
图1B为本申请实施例所适用的一种电容触控系统的结构示意图二；
图1C为本申请实施例所适用的一种电容触控系统中的AFE电路的结构示意图；
图2为本申请实施例提供的一种信号发射方法的流程图；
图3为本申请实施例提供的一种信号发射方法中所适用的相位信号的示 意图；
图4为本申请实施例提供的一种信号接收方法的流程图；
图5为本申请实施例提供的一种笔尖信号与打码频率的对应关系图；
图6为本申请实施例提供的一种主动笔发射的笔尖信号的示意图；
图7为本申请实施例提供的信号接收方法中信标码信号的解调示意图；
图8为本申请实施例提供的一种信号接收方法中ADC采样的信号相对于笔尖信号的关系图；
图9为本申请实施例提供的一种信号接收方法中解调幅度与时刻的对应关系图；
图10为本申请实施例提供的一种信号接收方法中对解调幅度与时刻的对应关系图；
图11为本申请实施例提供的一种信号接收方法中对解调幅度与时刻的对应关系图；
图12为本申请实施例提供的一种信号接收方法中进行编码信息解调的示意图；
图13为本申请实施例提供的一种信号发射装置的结构示意图；
图14为本申请实施例提供的一种信号接收装置的结构示意图；
图15为本申请实施例提供的主动笔的结构示意图；
图16为本申请实施例提供的具有触控屏的电子设备的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。 下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
本申请下述各实施例提供的信号发射方法、信号接收方法及装置，可应用于各种需要手指与主动笔的电容检测领域，例如带主动笔与触控功能的智能手机、笔记本电脑、可穿戴设备、家电设备、平板电脑等任一具有触控功能的电子设备。该些电子设备可具有电容触控屏，用以实现基于电容检测技术的触控功能。
如下先对本申请实施例的方案所适用的电容触控系统进行示例说明。图1A为本申请实施例所适用的一种电容触控系统的结构示意图一。如图1A所示，该电容触控系统可包括：触控屏1、主动笔2、触控芯片3及主机4。其中，触控屏1可包括：多个触控传感器11，该多个触控传感器11包括N个发射传感器，及M个接收传感器，该N个发射传感器和该M个接收传感器以矩阵的形式进行排列。该N个发射传感器可以为图1所示的Tx1、Tx2……TxN。该M个接收传感器可以为图1所示的Rx1、Rx2……RxM。
该多个触控传感器11均与触控芯片3连接。触控芯片3与主机4连接。主机4例如可以为电子设备的中央处理器(Central Processing Unit，简称CPU)。
该图1所示的电容触控系统可同时支持手指与主动笔进行触控。当通过手指进行触控时，触控芯片3可通过检测手指与对应位置的触控传感器11之间的互容与自容对该手指在触控屏1上的位置进行识别。
当通过主动笔进行触控时，主动笔2的笔尖与对应位置的触控传感器11之间形成耦合电容。主动笔2通过对待传输信息进行打码，并通过主动笔2的笔尖与触控传感器11之间的耦合电容，将该打码信号或称为笔尖信号传输至触控芯片3上。
一种示例中，触控芯片3可通过识别触控传感器11接收到的打码信号，并对该打码信号进行解调，得到该主动笔2的传输信息。在另一种示例中，触控芯片3可将该打码信号传输至主机4，由主机4对该打码信号进行解调，得到主动笔2的传输信息。在又一种示例中，可由触控芯片3与主机4结合，对该打码信号进行解调，得到该主动笔2的传输信息。例如，触控芯片3可确定主动笔2的部分信息，主机4确定该主动笔2的其它信息。
图1B为本申请实施例所适用的一种电容触控系统的结构示意图二。如图1B所示，该电容触控系统在上述图1A的基础上，其中，触控芯片3可包括：多个模拟前端(Analog Front-End，简称AFE)电路31、模数转换器(Analog-to-Digital Converter，简称ADC)32及数字处理模块33。其中，每个AFE电路31可连接一个触控传感器11。主动笔2的笔尖信号可通过笔尖与对应触控传感器11的耦合电容，耦合至与该触控传感器11连接的AFE电路31，由该AFE电路31对该笔尖信号进行放大和/或滤波等处理。每个AFE电路31还与ADC 32连接用以将该每个AFE电路31处理后的笔尖信号传输至ADC 32，即使得该每个AFE电路31处理后的笔尖信号被ADC 32所采集。
ADC 32将采集到的信号转换为数字信号后，传输至数字处理模块33，用以使得数字处理模块33根据转换后的数字信号，确定主动笔2的传输信息，并将结果传输至主机4。
或者，触控芯片3中也可不包括数字处理模块33，ADC 32可将采集到的信号转换为数字信号后，传输至主机4，由主机4根据该转换后的数字信号，确定该主动笔2的传输信息。
图1C为本申请实施例所适用的一种电容触控系统中的AFE电路的结构示意图。如图1C所示，上述图1B中所示的每个AFE电路31可包括：可编程增益放大器(Programmable Gain Amplifier，简称PGA)311和模拟抗混叠滤波器(Analog Antialiasing Filter，简称AAF)312。PGA 311的输入端与一个触控传感器11连接，该触控传感器11可以为发射传感器或者接收传感器。PGA 311的输出端还与AAF 312连接。AAF 312还与ADC 32连接。
其中，PGA 311可将耦合到的主动笔2的笔尖信号进行放大，例如将该笔尖信号的幅值调整至预设的幅值，实现幅值的放大。AAF 312可将PGA 312处理后的信号中预设打码频率之外的干扰进行滤除之后，传输至ADC 32，使得ADC 32采集的信号为笔尖信号中的有效信号。
如下通过多个实例对应用于图1A-图1C任一所述的触控系统中的信号发射与接收方法、主动笔、电子设备及存储介质等进行说明。
图2为本申请实施例提供的一种信号发射方法的流程图。该信号发射方法可应用于上述任一所述的触控系统中的主动笔2执行。如图2所示，该信 号发射方法可包括如下：
S201、采用预设的相位信号对待传输信息进行相位编码，得到编码信号。
该主动笔2可在与触控屏1接触的情况下，获取该待传输信息，继而执行S201。该待传输信息可以为数字信号。
该预设的相位信号例如可以为模拟相位信号，例如可以为正弦波信号、余弦波信号、三角波信号等任一类型的模拟相位信号。
采用预设相位信号对该待传输信息进行相位编码，得到的该编码信号便可以为模拟信号。
其中，对于该待传输信息，不同的多进制编码可采用不同的相位信号进行相位编码，该不同的相位信号例如可以为起始相位不同的多个信号。
若该待传输信息为N进制编码，则N进制数“0”、“1”到“N-1”可以分别采用起始相位差为360/N的正弦波信号进行相位编码。
例如，若该待传输信息为二进制编码，二进制数“0”和二进制数“1”分别采用起始相位差为180°的正弦波信号进行相位编码。
若该待传输信息为四进制编码，四进制数“0”、“1”、“2”及“3”分别采用起始相位差为0°、90°、180°和270°的正弦波信号进行相位编码。
同理，采用更多的相位信号，进行更多位进制数的编码，可实现更少位传输更多的信息。
图3为本申请实施例提供的一种用于二进制编码的相位信号的示意图。图3所示的，该第一相位信号和第二相位信号例如可以为起始相位差为180°的正弦波信号。当然，图3仅为进行相位编码所采用的相位信号的一种可能的示例，该第一相位信号和该第二相位信号的起始相位差也可为其它的数值，在此不再赘述。
在一种示例中，该主动笔在获取到该待传输信息的二进制编码后，便可采用图3所示的第一相位信号，对该二进制编码中，二进制数“0”进行相位编码，采用图3所示的该第二相位信号，对该二进制编码中，二进制数“1”进行相位进行编码，继而得到该编码信号。
在另一种示例中，该主动笔在获取到该待传输信息的二进制编码后，便可采用图3所示的第二相位信号，对该二进制编码中，二进制数“0”进行相位编码；采用图3所示的该第一相位信号，对该二进制编码中，二进制数“1” 进行相位进行编码，继而得到该编码信号。
可选的，该主动笔的待传输信息可以包括：该主动笔的笔尖压力信息和/或该主动笔的功能键按压信息等信息。
S202、发射笔尖信号，该笔尖信号包括该编码信号。
该方法中，可在执行上述S201后得到，该编码信号，并根据该编码信号，得到该笔尖信号，使得该笔尖信号中包括有该编码信号。
示例地，该方法中，可直接根据该编码信号，得到该笔尖信号，也可根据该编码信号以及其他的信号得到该笔尖信号。
该笔尖信号还可称为笔尖打码信号或者打码信号等。
主动笔在获取该笔尖信号，可在与电子设备的触控屏接触的情况下，通过笔尖与触控屏上的触控传感器间的耦合电容，将该笔尖信号耦合至触控芯片，实现该笔尖信号的发射。
本申请实施例提供的信号发射方法中，可通过预设的相位信号对待传输信息进行相位编码，得到编码信号，并发射包括该编码信号的笔尖信号。由于该方法中，笔尖信号中的编码信号是根据相位信号进行编码的，该编码信号中不同信息之间无需设置时间间隔，因而，减少了笔尖信号中无效信号所占用的时间，使得主动笔在打码时间内可连续传输信息，使其在有效打码时间内传输更多的信息。
并且，对于该待传输信息的不同进制位，可采用不同的相位信号进行编码，可使得更少进制位传输更多的信息。
本申请实施例还可提供一种信号接收方法。该信号接收方法可应用于具有触控屏的电子设备中。该具有触控屏的电子设备至少可包括上述图1A-图1C中任一所述的触控系统中的触控屏1、触控芯片3以及主机4。当然，该电子设备还可包括其它的组件，在此不再赘述。图4为本申请实施例提供的一种信号接收方法的流程图。该信号接收方法可由电子设备通过软件和/或硬件的方式实现。如图4所示，该信号接收方法可包括如下：
S401、获取主动笔发射的笔尖信号；该笔尖信号包括：编码信号。
该S401可通过触控屏上的触控传感器与主动笔的笔尖的耦合电容，获取该主动笔发射的笔尖信号。
S402、根据预设的相位信号，对该编码信号进行相位解码，得到传输信 息。
在电子设备侧也称屏端，所采用的该预设的相位信号可与主动笔侧又称笔端，所采用的相位信号相同，其具体描述参见上述，在此不再赘述。
该主动笔发射的笔尖信号可以为模拟信号，则其中，该编码信号可以为模拟的编码信号。通过对该编码信号进行相位解码，可得到该传输信息的编码信息，如该传输信息的多进制编码。
该方法中，可通过对接收到的信号每个码进行相位解调，根据预设的相位与编码的对应关系，对该编码信号进行解码。
示例地，以二进制编码为例进行说明，如上述二进制编码中，若预设相位0°对应二进制数“0”，相位180°对应二进制数“1”。对接收到的信号中的每个码信号相位解调，如某个码信号的相位为0°，则此码信号对应二进制数“0”，如某个码信号的相位为180°，则此码信号对应二进制数“1”，继而得到该传输信息的所有的二进制编码。
需要说明的是，在该方法中，可由电子设备的触控芯片进行相位解码，也可由电子设备的主机进行相位解码。也就是说，S402可由电子设备的触控芯片执行，也可由电子设备的主机执行。
该电子设备在得到该传输信息后，便可根据该传输信息执行对应的触控操作。
可选的，其中，该传输信息可包括：该主动笔的笔尖压力信息和/或该主动笔的功能键按压信息等。
电子设备执行S402得到该传输信息后，还可根据该传输信息，确定该主动笔的笔尖压力信息和/或该主动笔的功能键按压信息等，继而根据该主动笔的笔尖压力信息和/或该主动笔的功能键按压信息等执行对应的触控操作。
本申请实施例提供的信号接收方法中，可通过获取主动笔发射的笔尖信号，该笔尖信号包括编码信号，并根据预设的相位信号对该编码信号进行相位解码，得到传输信息。由于该方法中，笔尖信号中的编码信号是根据相位信号进行编码的，该编码信号中不同信息之间无需设置时间间隔，因而，减少了笔尖信号无效信号所占用的时间，使得主动笔在打码时间内可连续传输信息，使其在有效打码时间内传输更多的信息，并采用多个相位进行多进制编码时，更可实现更少的编码位传输更多的信息。
可选的，在上述图2所示的信号发射方法的基础上，在S202中发射笔尖信号之前，该方法还可包括：
根据该编码信号及预设的信标码信号，得到该笔尖信号；
该信标码信号用于确定该主动笔在触控屏上的触控位置。
其中，该预设的信标码信号可以为预设的波形信号，例如预设的正弦波信号。
可选的，该信标码信号可包括：第一信标码信号和/或第二信标码信号。该第一信标码信号和该第二信标码可以为预设的相同的波形信号，也可以为不同的波形信号。
其中，该第一信标码信号可称为头码信号，可位于该笔尖信号中该编码信号的前面；该第二信标码信号可称为尾码信号，可位于该笔尖信号中该编码信号的后面。
可选的，上述方法中根据该编码信号及预设的信标码信号，得到该笔尖信号可包括：
根据该编码信号、预设的信标码信号以及空码信号，得到该笔尖信号。
该空码信号用于确定该信标码信号的起始时刻或结束时刻，继而对该笔尖信号和该触控屏进行时序同步。
由于主动笔和触控屏为两个时钟系统，因此，电子设备在获取到主动笔所发送的笔尖信号后，需进行时序同步。为便于进行该主动笔与触控屏间的时序同步，该主动笔可在发射的该笔尖信号中包括该空码信号。电子设备在根据空码信号确定该信标码信号的起始时刻或结束时刻，继而进行主动笔与触控屏间的时序同步之后，可更精确的确定主动笔的打码起始时刻，同时还可准确识别该笔尖信号中不同编码的信号的位置。
空码信号，顾明思议，空编码的信号，即在该空码信号内主动笔不发射任何信号，不打码。该空码信号的时间段内，电子设备还可进行手指的触控识别等操作。
在上述任一所述的信号发射方法的基础上，其中，该待传输信息可包括：该主动笔的待传输信息及预设的校验码。
该校验码，可用于对该主动笔的待传输信息进行校验，排除因干扰等因素引起的解码错误信息。
该校验码可位于笔尖信号中的预设固定位置。
该校验码可以为固定校验码，也可以为可变校验码。
若该校验码为固定校验码，则该校验码可以为预设的二进制数“0”或“1”。若该校验码为可变校验码，则该校验码可以为根据该主动笔的待传输信息所确定，其可随着该主动笔的待传输信息例如压力信息和/或按键信息的变化进行变化。
示例地，该校验码例如可以为根据该主动笔的待传输信息所确定的奇偶校验码。
电子设备在获取到该笔尖信号之后，在根据预设的相位信号对该编码信号进行相位解码，得到该主动笔的传输信息，以及该校验码，并根据该校验码对该主动笔的传输信息进行校验。若校验通过，则电子设备可根据该主动笔的传输信息执行对应的触控操作。
该方法还可结合校验码，排除错误的解码，降低误报率。
可选的，在上述任一所述的信号发射方法的基础上，上述S202中发射笔尖信号可包括：
采用多个打码频率交互方式，发射该笔尖信号。
假设，若该多个打码频率包括两个打码频率，则该主动笔可在第一打码频率对应的至少一个周期内，发射该笔尖信号，还在第二打码频率对应的至少一个周期内，发射该笔尖信号。
当电子设备检测到该多个打码频率均无干扰，则可采用该多个打码频率，对获取到的笔尖信号进行解码，继而使得电子设备得到该笔尖信号中传输信息，例如笔尖压力信息和/或功能键按压信息，在此情况下，可使得电子设备的压力和/或按键信息，以及坐标信息的刷新率不变。
当电子设备检测到该多个打码频率中一个打码频率的干扰较大时，可放弃该打码频率对应的笔尖信号，可降低电子设备的刷新率，提高抗干扰能力。
该方法中，采用多种打码频率交互的方式发射该笔尖信号，可有效提高电子设备的抗干扰能力。
图5为本申请实施例提供的一种笔尖信号与打码频率的对应关系图。如图5所示，该主动笔可在打码频率A对应的至少一个周期内，发射该笔尖信号，还在打码频率B对应的至少一个周期内，发射该笔尖信号。
当电子设备检测到打码频率A和打码频率B均无干扰，则可采用打码频率A和打码频率B，对获取到的笔尖信号进行解码，在此情况下，可使得电子设备的压力和/或按键信息，以及坐标信息的刷新率不变。
当电子设备检测到打码频率A和打码频率B中一个打码频率的干扰较大时，可放弃该打码频率对应的笔尖信号，可降低触控屏的刷新率至原有刷新率的1/2，提高抗干扰能力。
如下结合示例，对主动笔所发射的笔尖信号进行说明。图6为本申请实施例提供的一种主动笔发射的笔尖信号的示意图。如图6所示，在每个周期T内，主动笔所发射的笔尖信号中可包括：W个头码信号、X个编码与校验码的信号、Y个尾码信号和Z个空码信号。其中，每个码长t为T/(W+X+Y+Z)。W个头码信号与Y个尾码信号可用于使得电子设备进行屏端与笔端的时序同步，以及确定主动笔的笔尖在触控屏上的触控位置，如坐标位置。
其中，X个编码信号可包括压力码信号和/或按键码信号，其中，压力码信号可用于传输该主动笔的笔尖的压力信息，该按键码信号可用于传输该主动笔的功能键按压信息。例如，若主动笔的笔尖压力信息包括4096级的压力信息，采用二进制编码，则该X个编码信号中至少可包括12个压力码信号，采用四进制编码，则该X个编码信号中只需包括6个压力码信号，用以传输该压力信息。
X个编码信号中可包括至少一个校验码信号，该至少一个校验码信号可位于编码信号的预设固定位置。该至少一个校验码信号可用于使得电子设备对接收到的笔尖信号中的，压力码信号和/或按键码信号等信息进行校验，用以校验该笔尖信号中的该压力码信号和/或按键码信号等信息是否准确。
若该校验码信号为固定校验码信号，则该校验码信号可为笔尖信号中预设固定位置的编码信号。若该校验码信号为可变校验码信号，则该校验码信号例如可以为根据该压力码信号和/或按键码信号等信息确定的校验码信号，例如奇偶校验码的信号)。
在Z个空码信号的时期内主动笔不打码，即不发射信号，可使得电子设备进行手指的触控检测等。需要说明的是，图6所示的笔尖信号，各头码信号、尾码信号、编码信号和空码信号的相对位置以及包含的种类仅为一种可能的示例，还可以与图6所示的不同。
图6所示的每个打码周期T内，笔尖信号中的X个编码信号可以为根据预设的相位信号进行相位编码后得到的编码信号。对于不同的编码，可采用不同的相位信号进行编码。
由于该方法中，笔尖信号中的编码信号是根据相位信号进行编码的，该编码信号中不同信息之间无需设置时间间隔，因而，减少了笔尖信号无效信号所占用的时间，使得主动笔在打码时间内可连续传输信息，使其在有效打码时间内传输更多的信息，采用多个相位进行多进制编码时，更可实现更少的编码位传输更多的信息。
对应的，在上述图4所示的信号接收方法的基础上，通过执行S401获取到的笔尖信号可包括：编码信号以及预设的信标码信号。该方法还可包括：
根据该信标码信号，确定该主动笔在该触控屏上的触控位置。
该电子设备可在获取到该笔尖信号后，便根据该笔尖信号中的该信标码信号，确定该主动笔在该触控屏上的触控位置，也称触控坐标或坐标位置。
该主动笔在该触控屏上的触控位置可以为该主动笔的笔尖在该触控屏上所处的发射传感器与接收传感器的位置。
示例地，上述根据该信标码信号，确定该主动笔在该触控屏上的触控位置可包括：
对该信标码信号进行同相正交(In-phase Quadrature，简称IQ)解调，得到第一解调幅度；
根据该第一解调幅度，确定该主动笔在该触控屏上的触控位置。
可选的，该信标码信号包括：第一信标码信号和/或第二信标码信号；其中，该第一信标码信号位于该笔尖信号中，该编码信号的前面；该第二信标码信号位于该笔尖信号中，该编码信号的后面。
该方法中，可对该信标码信号进行IQ解调，得到该第一解调幅度，若该解调幅度大于或等于预设值，则根据该第一解调幅度确定该主动笔在该触控屏上的触控位置。其中，该第一解调幅度为可以为信标码信号的幅度。
其中，该电子设备可对第一信标码信号进行解调，也可对该第二信标码信号进行解调，还可将该第一信标码信号与该第二信标码信号拼接后进行解调。
图7为本申请实施例提供的信号接收方法中信标码信号的解调示意图。假 设，在每个打码周期T内，电子设备所获取的笔尖信号包括：W个头码信号、X个编码信号与校验码信号、Y个尾码信号和Z个空码信号。
在一种示例中，电子设备可通过对头码信号进行IQ解析，确定头码幅度，并根据该头码幅度确定该主动笔的笔尖在该触控屏上的坐标位置。
在另一种示例中，电子设备可通过对尾码信号进行IQ解析，确定尾码幅度，并根据该尾码幅度确定该主动笔的笔尖在该触控屏上的坐标位置。
在又一种示例中，电子设备可对该头码信号和尾码信号进行拼接，对拼接后的信号进行IQ解析，得到头码和尾码的幅度，并根据该头码和尾码的幅度确定该主动笔的笔尖在该触控屏上的坐标位置。
可选的，在上述任一所述的信号接收方法的基础上，其中，该笔尖信号还包括：空码信号。
该信号接收方法还可包括：
根据该空码信号，确定该信标码信号的起始时刻或结束时刻；
根据该信标码信号的起始时刻或结束时刻，对该笔尖信号和该触控屏进行时序同步。
示例地，上述方法中，根据该空码信号，确定该信标码信号的起始时刻或结束时刻，可包括：
对该笔尖信号中，包括该空码信号在内的预设码长时间内的信号进行IQ解调，得到第二解调幅度；
根据该第二解调幅度，确定该信标码信号的起始时刻或结束时刻。
该第二解调幅度可以为包括该空码信号在内的预设码长时间内的信号的幅度。
该包括该空码信号在内的预设码长时间内的信号可称为该笔尖信号中，空码附件的信号。
电子设备在确定该第二解调幅度后，还可根据该第二解调幅度确定该预设时间内的幅度变化，根据该幅度变化，确定的该信标码信号的起始时刻或结束时刻。例如，该预设时间内的幅度变化为幅度下降，则可确定该信标码的结束时刻，即尾码信号的结束时刻；若该预设时间内的幅度变化为幅度上升，则可确定该信标码的开始时刻，例如头码的开始时刻。
例如，图8为本申请实施例提供的一种信号接收方法中ADC采样的信号相 对于笔尖信号的关系图。电子设备中ADC可对触控屏上所有触控传感器例如所有的接收传感器连接的AFE电路所输出的信号进行采集，当主动笔的笔尖与触控屏的任意位置接触时，笔尖信号便可被ADC采集到。ADC每次采集信号的时长为预设的笔尖信号周期T，也称为周期T。当笔尖信号被电子设备的ADC所采集到时，ADC所采集到的信号与主动笔周期发射的笔尖信号之间存在图8所示的5种情形。
情形1，ADC采集的信号，可能与主动笔发射的笔尖信号完成对齐。
情形2：ADC采集的信号可能包括：完整的尾码信号、完整的编码信号、完整的空码信号及少量的头码信号。
情形3：ADC采集的信号可能包括：完整的尾码信号、完整的空码信号、完整的头码信号及部分的编码信号。
情形4：ADC采集的信号可能包括：部分的尾码信号、完整的空码信号、完整的头码信号以及部分的编码信号。
情形5：ADC采集的信号可能包括：部分的空码信号如1/2的空码信号、完整的头码信号、完整的编码信号、完整的尾码信号以及下一周期内的1/2空码信号。
如上所述的5种情形又可分为两大类：1.完整的空码信号、完整的尾码信号和/或完整的头码信号；2.1/2空码信号、完整的头码信号和/或尾码信号。
由于ADC采集到的笔尖信号可能与主动笔发射的笔尖信号之间不对其，存在上述图8所示的情形2至情形5中任一，因此，需可确定采集到的笔尖信号中的头码信号的起始时刻或尾码信号的结束时刻，继而对采集到的笔尖信号进行时序同步。
图9为本申请实施例提供的一种信号接收方法中解调幅度与时刻的对应关系图。如图9所示，若一个周期T内，该电子设备所获取的笔尖信号包括：W个头码信号0、X个编码信号与校验码信号、Y个尾码信号和Z个空码信号。
该电子设备可在预设的解调时长内，对该解调时长内的信号进行IQ解调，得到解调幅度。该解调时长可以为M个码长的时长。在该解调时长内，若信号连续，则解调幅度为最大值M*A，且保持不变。其中，A为单个码长内的解调幅度。例如，在解调时长t0-t1和t5-t6内，信号连续，便可解调得到解调幅度为最大值M*A。在解调时长内，有部分连续信号，部分空码信号时，解 调幅度随着空码信号的时长越大，解调幅度越小，例如，解调时长t1-t2和t4-t5。当解调时长内，全为空码信号时，解调幅度为0，例如解调时长t2-t4。
若Z/2-1>M且M<min(W,Y)(W、Y、Z为上文头码信号、尾码信号、空码信号的个数)，则可对图9所示的电子设备的ADC采样到的信号中，数据沿起始时刻按预设的步进间隔进行IQ解调，都会有从M*A变化到0或者从0变化到M*A的时间段，且M*A和0会保持一段时间。其中，M*A和0保持一段时间是为了防止误识别。例如。当不同二进制码进行相位编码的相位信号的起始相位差为180度时，为了避免特殊编码情况下，如101010…，编码阶段被误识别为空码阶段，此时M可以为奇数，且空码信号内检测到的幅度为0且保持一段时间，则不会出现误识别。
解调幅度M*A处可以为尾码信号或者头码信号，解调幅度0处则为空码信号。根据解调幅度从M*A变化到0，便可确定尾码信号的结束时刻；根据解调幅度从0变化到M*A，便可确定头码信号的开始时刻。
图10为本申请实施例提供的一种信号接收方法中对解调幅度与时刻的对应关系图。假设通过上述图9所示的方法，可得到头码信号的开始时刻或者尾码信号的结束时刻在ADC所采集的笔尖信号中的位置，便可确定该ADC采集到的笔尖信号相对于理想ADC采集信号之间的时间偏差。该理想ADC采集信号可以为主动笔发射的笔尖信号。
如图10所示，在理想情况下，尾码信号的结束时刻在ADC采集到的笔尖信号中的位置可以为t0＝t 头码+t 编码+t 尾码。当检测到尾码信号的结束时刻在ADC采集到的笔尖信号的位置为t1时，便可确定ADC采集到的笔尖信号相对于理想笔尖信号之间的时间偏差，可将ADC的采样起始时间前移t0-t1，即可实现ADC采集到的笔尖信号的时序同步。
理想情况下，头码信号的开始时刻在ADC采样的笔尖信号中的位置为时刻0，当检测到头码信号的开始时刻在ADC采样的笔尖信号的位置为t2时，便可确定ADC采样的笔尖信号相对于理想笔尖信号之间的时间偏差，可将ADC的采样的起始时刻前移T-t2，即可实现ADC采集到的笔尖信号的时序同步。
在对ADC采集的笔尖信号进行时序同步后，便可由ADC采集每个AFE电路的数据，每个AFE电路的采集时长可以为预设的周期T。ADC在采集到AFE电路传输的笔尖信号后，可将该笔尖信号传输至触控芯片，由该触控芯片对 该笔尖信号进行相位解码等操作，确定该笔尖在触控屏上的触控位置以及该笔尖信号中的传输信息如笔尖压力信息和/或功能按键信息。
可选的，通过执行上述信号接收方法中S402，便可得到传输信息，该传输信息可包括：该主动笔的传输信息及预设的校验码。该主动笔的传输信息可包括：笔尖压力信息和/或功能按键信息。
该校验码的描述可参见上述，在此不再赘述。
该信号接收方法还可包括：
根据该校验码，对该主动笔的传输信息进行校验。
若校验通过，则可确定接收到比较信号中，该主动笔的传输信息解码准确，则上报该主动笔的传输信息，即报点。若校验不通过，则可确定接收到比较信号中，该主动笔的传输信息的解码不准确，可丢弃在该周期内获取到的笔尖信号。
示例地，图11为本申请实施例提供的一种信号接收方法中对解调幅度与时刻的对应关系图。
如图11所示，该电子设备可采用IQ解调，对笔尖信号中的头码信号和/或尾码信号进行解调，确定解调幅度，并根据该解调幅度确定该主动笔的笔尖在触控屏的坐标位置，如笔尖所在触控屏对应的触控传感器的位置。当解调幅度大于或等于预设值，便可确定该主动笔的笔尖在触控屏的坐标位置。
该电子设备还对笔尖信号中的编码信号进行解调确定该编码信号中每个编码信号的相位，然后根据预设的相位与编码的对应关系，确定该编码信号对应的编码，又称编码序列，继而可根据该编码信号对应的编码，确定该传输信息，即笔尖压力信息和/或功能键的按压信息等。同时还根据校验码判断此周期T采集到的笔尖信号是否正确。
在一种实现方式中，上述S402中根据预设的相位信号，对该编码信号进行相位解码，得到传输信息，包括：
对该笔尖信号中的每个编码信号进行IQ解调，解调出相位信息；
根据预设的相位信号，解析该每个编号信号的相位信息，确定该每个编码信号的编码。
在另一种实现方式中，上述S402中根据预设的相位信号，对该编码信号进行相位解码，得到传输信息，包括：
对该笔尖信号中，每个编码信号与该信标码信号进行拼接，得到拼接信号；
根据预设的相位信号，对该拼接信号进行解析，确定该每个编码信号的编码；该传输信息包括：该笔尖信号中至少一个编码信号的编码。
对该每个编码信号与该信标码信号进行拼接进行解析，增长了等效打码时间，增大了等效打码电压，可有效提高信号解析的抗干扰能力。
图12为本申请实施例提供的一种信号接收方法中进行编码信息解调的示意图。当编码信号的个数较多，由于单个码长通常较短，利用IQ解调时，解析编码信息时的抗干扰能力较差。部分相位解码方式中，可对将多个编码信号进行拼接后，再进行IQ解调，便可有效提升抗干扰能力。如图13所示，对于二进制编码，采用起始相位差为180°两种相位信号分别对二进制数“0”和“1”进行解码时，头码信号和尾码信号可采用同一种相位信号，如“0”，可利用头码信号做IQ解调，确定解调幅度，继而确定该主动笔的笔尖在触控屏的坐标位置。
而在解析笔尖信号中的编码信号时，可不采用图11所示对每个编码信号单独做IQ解调的方式进行解调相位，而将每个编码信号和头码信号拼接在一起，对拼接之后的W+1个码信号做IQ解调。若单个码长信号IQ解调得到的值为A，那么头码信号IQ解调得到的值为W*A。拼接某个编码信号之后，若拼接之后IQ解调得到的值为(W+1)*A，则此位编码信号与头码信号具有相同的起始相位，其该位编码信号对应的二进制编码为“0”；若拼接之后IQ解调得到的值为(W-1)*A，则此位编码信号与头码信号具有相差180°的起始相位，其该位编码信号对应的二进制编码为“1”。可以看出，在已知每个编码信号的二进制编码非“0”即“1”时，“0”和“1”的编码引起的幅度差为2*A，等效打码电压为2倍，且解调或编码时长从1个码时长提升到W+1个码的时长，可有效提升解析信号时的抗干扰能力。
本申请实施例还提供一种信号发射装置。该信号发射装置可通过软件和/或硬件的方式集成在主动笔上。图13为本申请实施例提供的一种信号发射装置的结构示意图。如图13所示，该信号发射装置130可包括：
编码模块131，用于采用预设的相位信号对待传输信息进行相位编码，得 到编码信号。
发射模块132，用于发射笔尖信号，该笔尖信号包括该编码信号。
可选的，该信号发射模块130还可包括：
生成模块，用于根据该编码信号及预设的信标码信号，得到该笔尖信号；
该信标码信号用于确定该主动笔在触控屏上的触控位置。
可选的，生成模块，具体用于根据该编码信号、预设的信标码信号以及空码信号，得到该笔尖信号。
该空码信号用于确定该信标码信号的起始时刻或结束时刻，继而对该笔尖信号和该触控屏进行时序同步。
可选的，该信标码信号包括：第一信标码信号和/或第二信标码信号。
其中，该第一信标码信号位于该笔尖信号中，该编码信号的前面；该第二信标码信号位于该笔尖信号中，该编码信号的后面。
可选的，该待传输信息包括：该主动笔的待传输信息及预设的校验码；
该校验码，用于对该主动笔的待传输信息进行校验。
可选的，该主动笔的待传输信息包括：该主动笔的笔尖压力信息和/或该主动笔的功能键按压信息。
本申请实施例提供的信号发射装置，可执行上述任一所述实施例提供的主动笔执行的信号发射方法，其具体的实现过程及有益效果参见上述，在此不再赘述。
本申请实施例还提供一种信号接收装置。该信号接收装置可通过软件和/或硬件的方式集成在电子设备上。图14为本申请实施例提供的一种信号接收装置的结构示意图。如图14所示，该信号接收装置140可包括：
获取模块141，用于获取主动笔发射的笔尖信号；该笔尖信号包括：编码信号。
解码模块142，用于根据预设的相位信号，对该编码信号进行相位解码，得到传输信息。
可选的，该笔尖信号还包括：预设的信标码信号。
可选的，信号接收装置140还可包括：
第一确定模块，用于根据该信标码信号，确定该主动笔在该触控屏上的触控位置。
可选的，第一确定模块，具体用于对该信标码信号进行IQ解调，得到第一解调幅度，根据该第一解调幅度，确定该主动笔在该触控屏上的触控位置。
可选的，该笔尖信号还包括：空码信号。
信号接收装置140还可包括：
第二确定模块，用于根据该空码信号，确定该信标码信号的起始时刻或结束时刻；
同步模块，用于根据该信标码信号的起始时刻或结束时刻，对该笔尖信号和该触控屏进行时序同步。
可选的，第二确定模块，具体用于对该笔尖信号中，包括该空码信号在内的预设码长时间内的信号进行IQ解调，得到第二解调幅度；根据该第二解调幅度，确定该信标码信号的起始时刻或结束时刻。
可选的，解码模块142，具体用于对该笔尖信号中，可单独对每个编码信号进行IQ解调，解调出相位信息，根据预设的相位信号，解析该每个编码信号的相位信息，确定该每个编码信号的编码。该传输信息的编码包括：该笔尖信号中至少一个编码信号的编码。
可选的，解码模块142，具体用于对该笔尖信号中，可将每个编码信号与该信标码信号进行拼接，得到拼接信号；根据预设的相位信号，对该拼接信号进行解析，确定该每个编码信号的编码；该传输信息的编码包括：该笔尖信号中至少一个编码信号的编码。
可选的，该信标码信号包括：第一信标码信号和/或第二信标码信号；
其中，该第一信标码信号位于该笔尖信号中，该编码信号的前面；该第二信标码信号位于该笔尖信号中，该编码信号的后面。
可选的，该传输信息的编码包括：该主动笔的传输信息的编码及预设的校验码。
信号接收装置140还可包括：
校验模块，用于根据该校验码，对该主动笔的传输信息的编码进行校验。
可选的，该主动笔的传输信息包括：该主动笔的笔尖压力信息和/或该主动笔的功能键按压信息。
本申请实施例提供的信号接收装置，可执行上述任一所述实施例提供的电子设备执行的信号接收方法，其具体的实现过程及有益效果参见上述，在 此不再赘述。
本申请实施例还可提供一种主动笔。图15为本申请实施例提供的主动笔的结构示意图。如图15所示，该主动笔150可包括存储器151和处理器152。存储器151与处理器152耦合。
存储器151，用于存储程序指令。
处理器152，用于调用该存储器存储的程序指令，使得该主动笔执行上任一所述的信号发射方法。
本申请实施例还可提供一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器152执行时实现执行上任一所述的信号发射方法。
本申请实施例提供的主动笔及计算机可读存储介质，可执行上述任一所述实施例提供的主动笔执行的信号发射方法，其具体的实现过程及有益效果参见上述，在此不再赘述。
本申请实施例还可提供一种具有触控屏的电子设备。图16为本申请实施例提供的具有触控屏的电子设备的结构示意图。如图16所示，具有触控屏的电子设备160可包括存储器161和处理器162。存储器161与处理器162耦合。
存储器161，用于存储程序指令。
处理器162，用于调用该存储器存储的程序指令，使得具有触控屏的电子设备160执行上任一所述的信号接收方法。
本申请实施例还可提供一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器162执行时实现执行上任一所述的信号接收方法。
本申请实施例提供的具有触控屏的电子设备及计算机可读存储介质，可执行上述任一所述实施例提供的电子设备执行的信号接收方法，其具体的实现过程及有益效果参见上述，在此不再赘述。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通 技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (30)

  1. 一种信号发射方法，其特征在于，所述方法应用于主动笔，所述方法包括：
    采用预设的相位信号对待传输信息进行相位编码，得到编码信号；
    发射笔尖信号，所述笔尖信号包括所述编码信号。
  2. 根据权利要求1所述的方法，其特征在于，所述发射笔尖信号之前，所述方法还包括：
    根据所述编码信号及预设的信标码信号，得到所述笔尖信号；
    所述信标码信号用于确定所述主动笔在触控屏上的触控位置。
  3. 根据权利要求2所述的方法，其特征在于，根据所述编码信号及预设的信标码信号，得到所述笔尖信号，包括：
    根据所述编码信号、预设的信标码信号以及空码信号，得到所述笔尖信号；
    所述空码信号用于确定所述信标码信号的起始时刻或结束时刻，继而对所述笔尖信号和所述触控屏进行时序同步。
  4. 根据权利要求2所述的方法，其特征在于，所述信标码信号包括：第一信标码信号和/或第二信标码信号；
    其中，所述第一信标码信号位于所述笔尖信号中，所述编码信号的前面；所述第二信标码信号位于所述笔尖信号中，所述编码信号的后面。
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，所述待传输信息包括：所述主动笔的待传输信息及预设的校验码；
    所述校验码，用于对所述主动笔的待传输信息的编码进行校验。
  6. 根据权利要求5所述的方法，其特征在于，所述主动笔的待传输信息包括：所述主动笔的笔尖压力信息和/或所述主动笔的功能键按压信息。
  7. 一种信号接收方法，其特征在于，所述方法应用于具有触控屏的电子设备，所述方法包括：
    获取主动笔发射的笔尖信号；所述笔尖信号包括：编码信号；
    根据预设的相位信号，对所述编码信号进行相位解码，得到传输信息。
  8. 根据权利要求7所述的方法，其特征在于，所述笔尖信号还包括：预设的信标码信号；
    所述方法还包括：
    根据所述信标码信号，确定所述主动笔在所述触控屏上的触控位置。
  9. 根据权利要求8所述的方法，其特征在于，所述根据所述信标码信号，确定所述主动笔在所述触控屏上的触控位置，包括：
    对所述信标码信号进行同相正交IQ解调，得到第一解调幅度；
    根据所述第一解调幅度，确定所述主动笔在所述触控屏上的触控位置。
  10. 根据权利要求8所述的方法，其特征在于，所述笔尖信号还包括：空码信号；
    所述方法还包括：
    根据所述空码信号，确定所述信标码信号的起始时刻或结束时刻；
    根据所述信标码信号的起始时刻或结束时刻，对所述笔尖信号和所述触控屏进行时序同步。
  11. 根据权利要求10所述的方法，其特征在于，所述根据所述空码信号，确定所述信标码信号的起始时刻或结束时刻，包括：
    对所述笔尖信号中，包括所述空码信号在内的预设码长时间内的信号进行IQ解调，得到第二解调幅度；
    根据所述第二解调幅度，确定所述信标码信号的起始时刻或结束时刻。
  12. 根据权利要求10所述的方法，其特征在于，所述根据预设的相位信号，对所述编码信号进行相位解码，得到传输信息，包括：
    对所述笔尖信号中，每个编码信号与所述信标码信号进行拼接，得到拼接信号；
    根据预设的相位信号，对所述拼接信号进行解析，确定所述每个编码信号的编码；所述传输信息包括：所述笔尖信号中至少一个编码信号的编码。
  13. 根据权利要求10所述的方法，其特征在于，所述信标码信号包括：第一信标码信号和/或第二信标码信号；
    其中，所述第一信标码信号位于所述笔尖信号中，所述编码信号的前面；所述第二信标码信号位于所述笔尖信号中，所述编码信号的后面。
  14. 根据权利要求7-13中任一项所述的方法，其特征在于，所述传输信息包括：所述主动笔的传输信息及预设的校验码；
    所述方法还包括：
    根据所述校验码，对所述主动笔的传输信息进行校验。
  15. 根据权利要求14所述的方法，其特征在于，所述主动笔的传输信息包括：所述主动笔的笔尖压力信息和/或所述主动笔的功能键按压信息。
  16. 一种信号发射装置，其特征在于，包括：
    编码模块，用于采用预设的相位信号对待传输信息进行相位编码，得到编码信号；
    发射模块，用于发射笔尖信号，所述笔尖信号包括所述编码信号。
  17. 根据权利要求16所述的装置，其特征在于，所述装置还包括：
    生成模块，用于根据所述编码信号及预设的信标码信号，得到所述笔尖信号；所述信标码信号用于确定主动笔在触控屏上的触控位置。
  18. 根据权利要求17所述的装置，其特征在于，
    所述生成模块，具体用于根据所述编码信号、预设的信标码信号以及空码信号，得到所述笔尖信号；所述空码信号用于确定所述信标码信号的起始时刻或结束时刻，继而对所述笔尖信号和所述触控屏进行时序同步。
  19. 根据权利要求17所述的装置，其特征在于，所述信标码信号包括：第一信标码信号和/或第二信标码信号；
    其中，所述第一信标码信号位于所述笔尖信号中，所述编码信号的前面；所述第二信标码信号位于所述笔尖信号中，所述编码信号的后面。
  20. 根据权利要求17-19中任一项所述的装置，其特征在于，所述待传输信息包括：所述主动笔的待传输信息及预设的校验码；
    所述校验码，用于对所述主动笔的待传输信息的编码进行校验。
  21. 根据权利要求20所述的装置，其特征在于，所述主动笔的待传输信息包括：所述主动笔的笔尖压力信息和/或所述主动笔的功能键按压信息。
  22. 一种信号接收装置，其特征在于，包括：
    获取模块，用于获取主动笔发射的笔尖信号；所述笔尖信号包括：编码信号；
    解码模块，用于根据预设的相位信号，对所述编码信号进行相位解码，得到传输信息。
  23. 根据权利要求22所述的装置，其特征在于，所述笔尖信号还包括：预设的信标码信号；所述装置还包括：
    第一确定模块，用于根据所述信标码信号，确定所述主动笔在触控屏上的触控位置。
  24. 根据权利要求23所述的装置，其特征在于，
    所述第一确定模块，具体用于对所述信标码信号进行同相正交IQ解调，得到第一解调幅度；根据所述第一解调幅度，确定所述主动笔在所述触控屏上的触控位置。
  25. 根据权利要求23所述的装置，其特征在于，所述笔尖信号还包括：空码信号；
    所述装置还包括：
    第二确定模块，用于根据所述空码信号，确定所述信标码信号的起始时刻或结束时刻；
    同步模块，用于根据所述信标码信号的起始时刻或结束时刻，对所述笔尖信号和所述触控屏进行时序同步。
  26. 根据权利要求25所述的装置，其特征在于，
    所述第二确定模块，具体用于对所述笔尖信号中，包括所述空码信号在内的预设码长时间内的信号进行IQ解调，得到第二解调幅度；根据所述第二解调幅度，确定所述信标码信号的起始时刻或结束时刻。
  27. 根据权利要求25所述的装置，其特征在于，
    所述解码模块，具体用于对所述笔尖信号中，每个编码信号与所述信标码信号进行拼接，得到拼接信号；根据预设的相位信号，对所述拼接信号进行解析，确定所述每个编码信号的编码；所述传输信息包括：所述笔尖信号中至少一个编码信号的编码。
  28. 根据权利要求25所述的装置，其特征在于，所述信标码信号包括：第一信标码信号和/或第二信标码信号；
    其中，所述第一信标码信号位于所述笔尖信号中，所述编码信号的前面；所述第二信标码信号位于所述笔尖信号中，所述编码信号的后面。
  29. 根据权利要求22-28中任一项所述的装置，其特征在于，所述传输信息包括：所述主动笔的传输信息及预设的校验码；
    所述装置还包括：
    校验模块，用于根据所述校验码，对所述主动笔的传输信息进行校验。
  30. 根据权利要求29所述的装置，其特征在于，所述主动笔的传输信息包括：所述主动笔的笔尖压力信息和/或所述主动笔的功能键按压信息。
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US10838522B2 (en) 2020-11-17
US20200050297A1 (en) 2020-02-13
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