Touch control processing device for receiving signal value, touch control system and method thereof

Abstract

The present invention is a touch processing device, a touch system and a method for receiving signal values. The touch processing method comprises: in a reference signal period, sensing a first characteristic value of an electric signal sent by a transmitter by means of a plurality of touch electrodes of a touch panel; in a first modulation signal period, sensing a second characteristic value and a first wave number of the electric signal; in a second modulation signal period, sensing a third characteristic value and a second wave number of the electric signal; calculating a first ratio value of the second characteristic value to the first characteristic value, and calculating a second ratio value of the third characteristic value to the first characteristic value; and calculating the signal value according to a function of the first ratio value, the second ratio value, the first wave number and the second wave number.

Description

Technical Field

[0001] The present application relates to a stylus pen, and more particularly to a method for modulating and demodulating electrical signals of the stylus pen. Background Art

[0002] The stylus usually sends electrical signals to the touch panel or screen through the stylus tip electrode or the electrode near the stylus tip. The touch processing device senses the electrical signals through the touch electrodes on the touch panel or screen. How to transmit the sensing information of the stylus to the touch processing device requires the stylus to modulate the electrical signal and the touch processing device to demodulate the electrical signal. Summary of the invention

[0003] According to one aspect of the present application, a transmitter for transmitting a signal value is provided. The transmitter includes: a signal modulator for transmitting an electrical signal through an electrode, wherein the electrical signal carries information indicating the signal value; and a controller connected to the signal modulator, for causing the signal modulator to transmit the electrical signal having a first duty ratio in a reference signal period, and causing the signal modulator to transmit the electrical signal having a second duty ratio in a modulation signal period, wherein a first ratio value of the second duty ratio to the first duty ratio corresponds to the signal value, wherein the reference signal period is the same length as the modulation signal period, and wherein the maximum amplitude of the electrical signal in the reference signal period is the same as that in the modulation signal period.

[0004] Furthermore, in order to simplify the design of the transmitter and the touch processing device, the first duty ratio is a fixed value known in advance, and the controller modulates the electrical signal of the second duty ratio according to the signal value.

[0005] Furthermore, in order to transmit the signal value sensed by the sensor of the transmitter, the transmitter further includes: a sensor for measuring a physical phenomenon to generate the signal value, wherein the signal value falls within a numerical range, and the numerical range includes more than three numerical values.

[0006] Furthermore, in order to transmit the pressure value exerted on the tip of the stylus when in use, the transmitter is the stylus, the electrode is the tip electrode of the stylus, the sensor is used to measure the pressure exerted on the tip electrode, and the signal value is the pressure value generated by the sensor.

[0007] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is away from the touch panel or screen, the transmitter further includes: a lighthouse signal sensor connected to the controller, for notifying the controller after detecting the lighthouse signal, wherein the controller, after receiving the notification from the lighthouse signal sensor, enables the signal modulator to emit the electrical signal with the first duty ratio in the reference signal time period, and enables the signal modulator to emit the electrical signal with the second duty ratio in the modulation signal time period.

[0008] Furthermore, in order to utilize the lighthouse signal to synchronize the stylus pen with each time period of the touch processing device, the transmitter is the stylus pen, the electrode is the tip electrode of the stylus pen, and the lighthouse signal sensor detects the lighthouse signal emitted by the touch panel via the tip electrode.

[0009] Furthermore, in order to utilize the second modulation method to transmit more signal value information within the same time, the controller is further used to enable the signal modulator to emit the electrical signal having a third duty ratio in another modulation signal time period, the electrical signal emitted in the modulation signal time period has a first wave number, and the electrical signal emitted in the other modulation signal time period has a second wave number, wherein the signal value corresponds to a function of the first proportion value, the second proportion value, the first wave number and the second wave number, and the second proportion value is the proportion value of the third duty ratio to the first duty ratio.

[0010] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0011] According to one aspect of the present application, a method for transmitting a signal value is provided. The method comprises: in a reference signal period, an electrical signal having a first duty ratio is emitted through an electrode, wherein the electrical signal carries information indicating the signal value; and in a modulation signal period, the electrical signal having a second duty ratio is emitted, wherein a first ratio value of the second duty ratio to the first duty ratio corresponds to the signal value, wherein the length of the reference signal period is the same as that of the modulation signal period, and wherein the maximum amplitude of the electrical signal in the reference signal period is the same as that in the modulation signal period.

[0012] Furthermore, in order to simplify the design of the transmitter and the touch processing device, the first duty ratio is a fixed value known in advance, and the electrical signal of the second duty ratio is modulated according to the signal value.

[0013] Furthermore, in order to transmit the signal value sensed by the sensor of the transmitter, the signal value is generated by the sensor measuring a physical phenomenon, wherein the signal value falls within a numerical range, and the numerical range includes more than three numerical values.

[0014] Furthermore, in order to transmit the pressure value exerted on the tip of the stylus when in use, the electrode is the tip electrode of the stylus, the sensor is used to measure the pressure exerted on the tip electrode, and the signal value is the pressure value generated by the sensor.

[0015] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is far away from the touch panel or screen, the method further includes: detecting a lighthouse signal; and after detecting the lighthouse signal, emitting an electrical signal having a first duty ratio in the reference signal period, and emitting the electrical signal having a second duty ratio in the modulation signal period.

[0016] Furthermore, in order to utilize the lighthouse signal to synchronize the stylus pen with the touch processing device in each time period, the electrode is the tip electrode of the stylus pen, and the lighthouse signal detection step is to detect the lighthouse signal emitted by the touch panel by the tip electrode.

[0017] Furthermore, in order to utilize the second modulation method to transmit more signal value information within the same time, the method further includes: emitting the electrical signal having a third working ratio in another modulation signal time period, the electrical signal emitted in the modulation signal time period has a first wave number, and the electrical signal emitted in the other modulation signal time period has a second wave number, wherein the signal value corresponds to a function of the first ratio value, the second ratio value, the first wave number and the second wave number, and the second ratio value is the ratio value of the third working ratio to the first working ratio.

[0018] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0019] According to one aspect of the present application, a touch processing device for receiving a signal value is provided. The touch processing device includes: a sensing circuit module, which is used to connect to multiple touch electrodes of a touch panel to detect an electrical signal sent by a transmitter, wherein the electrical signal carries information representing the signal value; and a processor module, which is connected to the sensing circuit module, which is used to execute instructions in a non-volatile memory to implement the following steps: allowing the sensing circuit module to sense the first characteristic value of the electrical signal in a reference signal period; allowing the sensing circuit module to sense the second characteristic value and the first wave number of the electrical signal in a first modulation signal period; allowing the sensing circuit module to sense the third characteristic value and the second wave number of the electrical signal in a second modulation signal period; calculating a first ratio value of the second characteristic value to the first characteristic value, and calculating a second ratio value of the third characteristic value to the first characteristic value; and calculating the signal value according to a function of the first ratio value, the second ratio value, the first wave number, and the second wave number.

[0020] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0021] Furthermore, to facilitate the processing of the touch processing device, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0022] Furthermore, in order to restore the original modulation characteristics of the electrical signal emitted by the stylus, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the working proportions of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0023] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is far away from the touch panel or screen, the touch processing device further includes: a driving circuit module connected to the multiple touch electrodes and the processor module, wherein the processor module is further used to execute instructions in the non-volatile memory to implement the following steps: before sensing the first characteristic value, the second characteristic value and the third characteristic value, the driving circuit module emits a lighthouse signal through the multiple touch electrodes.

[0024] According to one aspect of the present application, a touch control system for receiving a signal value is provided. The touch control system comprises: a touch control panel including a plurality of touch control electrodes; and the aforementioned touch control processing device.

[0025] Furthermore, in order to maintain the integrity and compatibility of the touch system, the touch system further includes the transmitter for sending the electrical signal.

[0026] According to one aspect of the present application, a touch processing method for receiving a signal value is provided. The touch processing method includes: in a reference signal period, sensing a first characteristic value of an electrical signal sent by a transmitter by means of a plurality of touch electrodes of a touch panel; in a first modulation signal period, sensing a second characteristic value and a first wave number of the electrical signal; in a second modulation signal period, sensing a third characteristic value and a second wave number of the electrical signal; calculating a first ratio value of the second characteristic value to the first characteristic value, and calculating a second ratio value of the third characteristic value to the first characteristic value; and calculating the signal value according to a function of the first ratio value, the second ratio value, the first wave number, and the second wave number.

[0027] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0028] Furthermore, to facilitate the processing of the touch processing device, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0029] Furthermore, in order to restore the original modulation characteristics of the electrical signal emitted by the stylus, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the working proportions of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0030] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is far away from the touch panel or screen, the touch processing method further includes: before sensing the first characteristic value, the second characteristic value and the third characteristic value, emitting a beacon signal through the multiple touch electrodes.

[0031] According to the touch processing method, device and touch system provided by the present application, the sensing signal value on the stylus can be transmitted to the touch processing device through the electrical signals of more than two time periods. Since the electrical signals of the reference signal time period are used as reference, the obtained signal strength or the ratio of the working ratio will not be affected by the touch electrode density at the location where the stylus is located. In addition, the electrical signal can be modulated in two ways at the same time to transmit more information in the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 FIG. 4 is a block diagram of a touch control system according to an embodiment of the present application.

[0033] Figure 2 FIG. 1 is a block diagram of a stylus pen 130 according to an embodiment of the present application.

[0034] Figure 3A FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0035] Figure 3B FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0036] Figure 3C FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0037] Figure 4A FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0038] Figure 4B FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0039] Figure 4CFIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0040] Figure 4D FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0041] Figure 5A FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0042] Figure 5B FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0043] Figure 5C FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0044] Fig. 6A FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0045] Figure 6B FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0046] Figure 6C FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0047] Figure 7 FIG. 4 is a timing diagram of electrical signal transmission according to an embodiment of the present application.

[0048] Figure 8 A schematic flowchart of a method for transmitting a signal value according to an embodiment of the present application is provided.

[0049] Fig. 9 A schematic flowchart of a method for transmitting a signal value according to an embodiment of the present application is provided.

[0050] Fig.10 A schematic flowchart of a touch processing method for receiving a signal value according to an embodiment of the present application is provided.

[0051] Fig.11 A schematic flowchart of a touch processing method for receiving a signal value according to an embodiment of the present application is provided.

[0052]

Main component symbol description

[0053] 100: Touch control system 110: Touch control processing device

[0054] 111: Interconnection Network Module

[0055] 112: driving circuit module 113: sensing circuit module

[0056] 114: Processor module 115: Interface module

[0057] 120: touch screen or panel 121, 121A-C: first electrode

[0058] 122, 122A-H: second electrode 130: stylus

[0059] 135: Touchpad wipe 140: Host

[0060] 141: Input / output interface module 142: CPU module

[0061] 143: Graphics processor module 144: Memory module

[0062] 145: Network interface module 146: Memory module

[0063] 210: Controller 220: Pressure sensor

[0064] 230: Signal modulator 240: Pen tip

[0065] 250: Lighthouse signal sensor 300: Electrical signal transmission timing

[0066] 310: signal transmission period 312, 312D: reference signal period

[0067] 314, 314A-314F: Modulation signal period 500: Electrical signal transmission sequence

[0068] 510: Signal transmission period 520: First modulation signal period

[0069] 530: Second modulation signal period 600: Electrical signal transmission timing

[0070] 610: Signal transfer period 800: Method for transferring signal value

[0071] 810-840: Step 900: Method for transmitting signal value

[0072] 940-950: Step 1000: Touch processing method for receiving signal value

[0073] 1010-1040: Step 1100: Touch processing method for receiving signal value

[0074] 1130-1150: Steps DETAILED DESCRIPTION

[0075] Please refer to Figure 1, which is a schematic block diagram of a touch control system 100 according to an embodiment of the present invention. The touch control system 100 can be a common desktop, laptop, tablet personal computer, industrial control computer, smart phone or other computer system with touch function.

[0076] The touch control system 100 may include a touch control processing device 110, a touch panel or screen 120 connected to the touch control processing device, and a host 140 connected to the touch control processing device. The touch control system 100 may further include one or more styluses 130 and / or touchpad erasers 135. Hereinafter, in this application, the touch panel or screen 120 may be generally referred to as a touch screen 120, but in an embodiment lacking a display function, a person skilled in the art will know that the touch screen referred to in this application is a touch panel.

[0077] The touch screen 120 includes a plurality of first electrodes 121 parallel to the first axis and a plurality of second electrodes 122 parallel to the second axis. The first electrode 121 can be interlaced with the plurality of second electrodes 122 to form a plurality of sensing points or sensing areas. Similarly, the second electrode 122 can be interlaced with the plurality of first electrodes 121 to form a plurality of sensing points or sensing areas. In some embodiments, the present application may refer to the first electrode 121 as a first touch electrode 121, and the second electrode 122 as a second touch electrode 122. The present application also collectively refers to the first electrode 121 and the second electrode 122 as touch electrodes. In some embodiments of the touch screen 120, the first electrode 121 and the second electrode 122 are made of transparent materials. The first electrode 121 and the second electrode 122 can be in the same electrode layer, and the plurality of conductive sheets of each first electrode 121 or the second electrode 122 are connected by a bridge. The first electrode 121 and the second electrode 122 can also be in different electrode layers stacked up and down. Unless otherwise specified, the present application is generally applicable to embodiments of a single layer or multiple electrode layers. The first axis and the second axis are generally perpendicular to each other, but the present application does not limit the first axis to be perpendicular to the second axis. In one embodiment, the first axis can be a horizontal axis or an update axis of the touch screen 120.

[0078] The touch processing device 110 may include the following hardware circuit modules: an interconnection network module 111, a driving circuit module 112, a sensing circuit module 113, a processor module 114 and an interface module 115. The touch processing device 110 may be implemented in a single integrated circuit, which may include one or more chips. The touch processing device 110 may also be implemented using multiple integrated circuits and an interconnected circuit board carrying the multiple integrated circuits. The touch processing device 110 may also be implemented in the same integrated circuit as the above-mentioned host 140, or in the same chip as the above-mentioned host 140. In other words, the present application does not limit the implementation method of the touch processing device 110.

[0079] The connection network module 111 is used to respectively connect the plurality of first electrodes 121 and / or the plurality of second electrodes 122 of the touch screen 120. The connection network module 111 can receive control commands from the processor module 114, and is used to connect the driving circuit module 112 with any one or more touch electrodes, and is also used to connect the sensing circuit module 113 with any one or more touch electrodes. The connection network module 111 can include a combination of one or more multiplexers (MUX) to implement the above functions.

[0080] The driving circuit module 112 may include components such as a clock generator, a frequency divider, a frequency multiplier, a phase-locked loop, a power amplifier, a DC-DC voltage converter, a rectifier and / or a filter, and is used to provide a driving signal to any one or more touch electrodes through the above-mentioned connection network module 111 according to the control command of the processor module 114. Various analog signals or digital signals can be modulated for the above-mentioned driving signal to transmit certain information. The above-mentioned modulation methods include but are not limited to frequency modulation (FM), phase modulation, amplitude modulation (AM), double sideband modulation (DSB), single sideband modulation (SSB-AM), vestigial sideband modulation (Vestigial Sideband Modulation), amplitude shift modulation (ASK), phase shift modulation (PSK), quadrature amplitude modulation (QAM), frequency shift modulation (FSK), continuous phase modulation (CPM), code division multiple access (CDMA), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), pulse width modulation (PWM) and other technologies. The driving signal may include one or more square waves, sine waves or any modulated waveforms. The driving circuit module 112 may include one or more channels, and each channel may be connected to any one or more touch electrodes through the connection network module 111 .

[0081] The sensing circuit module 113 may include components such as an integrator, a sampler, a clock generator, a frequency divider, a frequency multiplier, a phase-locked loop, a power amplifier, a multiplier, a DC-DC voltage converter, a rectifier and / or a filter, and is used to sense any one or more touch electrodes through the above-mentioned connection network module 111 according to the control command of the processor module 114. When the touch signal is sent through the above-mentioned one touch electrode, the other touch electrode can sense the touch signal. The sensing circuit module 113 can cooperate with the modulation method performed by the above-mentioned driving circuit module 112 to perform corresponding demodulation on the driving signal sensed by the other touch electrode, so as to restore the information carried by the driving signal. The sensing circuit module 113 may include one or more channels, each of which can be connected to any one or more touch electrodes through the connection network module 111. At the same time, each channel can perform sensing and demodulation at the same time.

[0082] In one embodiment, the driving circuit module 112 and the sensing circuit module 113 may include an analog front-end (AFE) circuit. In another embodiment, in addition to the analog front-end circuit, the driving circuit module 112 and the sensing circuit module 113 may include a digital back-end (DBE) circuit. When the driving circuit module 112 and the sensing circuit module 113 only include the analog front-end circuit, the digital back-end circuit may be implemented in the processor module 114.

[0083] The processor module 114 may include a digital signal processor, which is used to connect the analog front-end circuits of the driving circuit module 112 and the sensing circuit module 113, and may also connect the digital back-end circuits of the driving circuit module 112 and the sensing circuit module 113. The processor module 114 may include an embedded processor, a non-volatile memory, and a volatile memory. The non-volatile memory may store a common operating system or a real-time operating system, and an application program executed under the operating system. The aforementioned operating system and application program include a plurality of instructions and data, which can be used to control other modules of the touch processing device 110, including the network connection module 111, the driving circuit module 112, the sensing circuit module 113, and the interface module 115, after the processor (including the embedded processor and / or the digital signal processor) executes these instructions. For example, the processor module 114 may include the 8051 series processor commonly used in the industry, the i960 series processor of Intel, the Cortex-M series processor of ARM, etc. The present application does not limit the type and number of processors included in the processor module 114 .

[0084] The above-mentioned multiple instructions and data can be used to implement the various steps mentioned in this application, as well as the processes and methods composed of these steps. Some instructions can operate independently within the processor module 114, such as arithmetic and logic operations. Other instructions can be used to control other modules of the touch processing device 110, and these instructions can include the input and output interfaces of the processor module 114 to control other modules. Other modules can also provide information to the operating system and / or application executed by the processor module 114 through the input and output interfaces of the processor module 114. Ordinary technicians in this field should have general knowledge of computer organization and architecture, and can understand that the processes and methods mentioned in this application can be implemented by means of the above-mentioned modules and instructions.

[0085] The interface module 115 may include various serial or parallel buses, such as a universal serial bus (USB), an integrated circuit bus (IC bus), or a serial bus. 2 C), PCI, PCI-Express, IEEE 1394 and other industrial standard input / output interfaces. The touch processing device 110 is connected to the host 140 via an interface module 115 .

[0086] The touch control system 100 may include one or more styluses 130 and / or touchpad erasers 135. The stylus 130 or touchpad eraser 135 may be a transmitter that emits an electrical signal, and may include an active transmitter that actively emits an electrical signal, or a passive transmitter that passively emits an electrical signal, or a reactive transmitter that emits an electrical signal in response to an external electrical signal. The stylus 130 or touchpad eraser 135 may include one or more electrodes for synchronously or asynchronously receiving an electrical signal from the touch screen 120, or for synchronously or asynchronously transmitting an electrical signal to the touch screen 120. These electrical signals may be modulated in one or more of the above-described ways.

[0087] The stylus pen 130 or the touchpad eraser 135 may be a conductor for conducting a driving signal or grounding through the user's hand or body. The stylus pen 130 or the touchpad eraser 135 may be connected to the input / output interface module 141 of the host 140 or other modules under the input / output interface module 141 in a wired or wireless manner.

[0088] The touch processing device 110 can detect one or more external conductive objects, such as human fingers, palms, or passive stylus 130 or touchpad eraser 135, through the touch screen 120, and can also detect the stylus 130 or touchpad eraser 135 that emits electrical signals. The touch processing device 110 can use mutual-capacitance or self-capacitance to detect external conductive objects. The above-mentioned stylus 130 or touchpad eraser 135 and the touch processing device 110 can use the above-mentioned signal modulation and corresponding signal demodulation methods to use electrical signals to transmit information. The touch processing device 110 can use electrical signals to detect one or more proximity positions of the stylus 130 or the touchpad eraser 135 approaching or contacting the touch screen 120, the sensor status (such as a pressure sensor or button) on the stylus 130 or the touchpad eraser 135, the direction of the stylus 130 or the touchpad eraser 135, or the tilt angle of the stylus 130 or the touchpad eraser 135 relative to the plane of the touch screen 120.

[0089] The host 140 is the main device for controlling the touch control system 110, and may include an input / output interface module 141 connected to the interface module 115, a central processing unit module 142, a graphics processing unit module 143, a memory module 144 connected to the central processing unit module 142, a network interface module 145 connected to the input / output interface module 141, and a storage module 146.

[0090] The memory module 146 includes a non-volatile memory, common examples of which are a hard disk, an electronically erasable programmable read-only memory (EEPROM), or a flash memory. The memory module 146 can store a common operating system and application programs executed under the operating system. The network interface module 145 can include a hardware network connection interface for wired connection and / or wireless connection. The network interface module 145 can comply with common industrial standards, such as the IEEE 802.11 wireless local area network standard, the IEEE 802.3 wired local area network standard, 3G, 4G, and / or 5G wireless communication network standards, Bluetooth wireless communication network standards, etc.

[0091] The central processing unit module 142 can be directly or indirectly connected to the above-mentioned input / output interface module 141, graphics processor module 143, memory module 144, network interface module 145 and storage module 146. The central processing unit module 142 can include one or more processors or processor cores. Common processors can include processors of x86 and x64 instruction sets of Intel, AMD, and VIA, or processors of ARM instruction sets of Apple, Qualcomm, and MediaTek, and can also include other forms of complex computer instruction sets (CISC) or reduced computer instruction sets (RISC) processors. The aforementioned operating system and application programs include multiple instructions and data corresponding to the above-mentioned instruction sets, which can be used to control other modules of the touch control system 100 after being executed by the central processing unit module 142.

[0092] The optional graphics processor module 143 is generally used to process the calculation part related to the graphics output. The graphics processor module 143 can be connected to the above-mentioned touch screen 120 to control the output of the touch screen 120. In some applications, the host 140 may not need the special processing of the graphics processor module 143, and can directly let the central processing unit module 142 perform the calculation part related to the graphics output.

[0093] The host 140 may also include other Figure 1 Components or parts not shown, such as sound input / output interface, keyboard input interface, mouse input interface, trackball input interface and / or other hardware modules. A person skilled in the art should have general knowledge of computer structure and architecture, and can understand that the touch control system 100 mentioned in this application is only a schematic description, and the rest of the parts related to the technical features of the invention provided in this application need to refer to the specification and the scope of the patent application.

[0094] Please refer to Figure 2 , which is a block diagram of a stylus pen 130 according to an embodiment of the present application. The controller 210 is used to control the stylus pen 130. The controller 210 may be a logic circuit or may include a processor. The processor is used to execute instructions stored in a non-volatile memory to control the stylus pen 130.

[0095] The stylus 130 includes a pen tip 240 and a pressure sensor 220 for measuring the force applied to the pen tip 240. In one embodiment, the pressure sensor 220 can be used to sense the force applied to a part other than the pen tip 240. For example, the pressure sensor 220 can sense the pressure at a certain part of the pen shaft of the stylus 130. The user can adjust the grip force to control the stylus 130. The pressure sensor 220 can transmit the measured pressure value to the controller 210.

[0096] It will be appreciated by those skilled in the art that although Figure 2 The embodiment of the present invention takes the pressure sensor 220 as an example, but the present invention can be applied to other sensors as long as the sensors transmit the measured values ​​to the controller 210.

[0097] After the controller 210 receives the measured pressure value, the signal modulator 230 can modulate the electrical signal to be sent according to the pressure value. In one embodiment, the pen tip 240 is composed of a conductor, and the signal modulator 230 can transmit the modulated electrical signal to the pen tip 240. When the pen tip 240 is close to or in contact with the touch panel or screen 120, the electrical signal can be conducted to the touch electrode of the touch panel or screen 120, and then transmitted to the touch processing device 110. In another embodiment, the stylus 130 can include other electrodes close to the pen tip 240, such as a ring electrode surrounding the pen tip 240. The signal modulator 230 can transmit the modulated electrical signal to other electrodes other than the pen tip 240. Similarly, when the electrode is close to the touch panel or screen 120, the electrical signal can be conducted to the touch electrode of the touch panel or screen 120, and then transmitted to the touch processing device 110.

[0098] The stylus 130 may further include a beacon signal sensor 250, which is connected to the electrode of the pen tip 240 or the electrode near the pen tip 240, and is used to receive the beacon signal sent from the touch electrode of the touch panel or screen 120. After receiving the beacon signal, the beacon signal sensor 250 notifies the controller 210, and the controller 210 then causes the signal modulator 230 to start modulation. Since the stylus 130 may not be near the touch panel or screen 120 most of the time, if the electrical signal is sent only after receiving the beacon signal sent by the touch panel or screen 120, the power of the stylus 130 can be saved and the working period of the stylus 130 can be extended.

[0099] One of the features of the present application is to use the ratio of the duty cycle of two electrical signals to transmit the above-mentioned pressure value or any sensing value, and the two electrical signals include a reference signal and a modulation signal. Since the greater the duty cycle within a certain period of time, the greater the strength of the electrical signal. The duty cycle of the reference signal can be set to a fixed value, so that the strength of the reference signal is used as a reference value. The touch processing device 110 can measure the ratio of the strength of the two electrical signals to calculate the above-mentioned pressure value or sensing value. Since the touch electrodes on the touch panel or screen 120 are not evenly distributed, if only the strength of the modulation signal is used for demodulation without a reference signal as a comparison benchmark, it is difficult to control the error caused by the change of the contact position of the pen tip 240 on the non-uniformly distributed touch electrodes. In addition, even if the stylus 130 is suspended at the same position, the strength of the modulation signal changes due to the distance between the stylus 130 and the touch panel or screen 120. If there is no reference signal as a comparison benchmark, it is difficult to control the error caused by the height change of the pen tip 240 near the position.

[0100] According to the above principle, after the controller 210 receives the sensing value, it will make the signal modulator 230 send out a reference signal with a fixed working ratio within the reference signal period, and make the signal modulator 230 send out a modulation signal with a variable working ratio within the modulation signal period. The reference signal period and the modulation signal period can constitute a signal transmission period. In addition to sending out electrical signals during the signal transmission period, the controller 210 can also send out other electrical signals before or after the signal transmission period for other purposes. For example, sending out a prefix code can be used to identify and locate the stylus 130, or sending out other electrical signals to transmit other types of information. The present invention does not limit what the electrical signal transmitted by the controller 210 is each time, as long as the sensing value is transmitted using the aforementioned signal transmission period.

[0101] Please refer to Figure 3A , which is a timing diagram of electrical signal transmission according to an embodiment of the present application. The stylus 130 can continuously send multiple signal transmission periods 310 to transmit the aforementioned sensing values. Each signal transmission period 310 can carry different sensing values. In other words, a sensor such as the pressure sensor 220 can obtain a new sensing value during the transmission of each signal transmission period 310 and transmit it in the next signal transmission period 310.

[0102] Each signal transmission period 310 includes a reference signal period 312 and a modulation signal period 314. Figure 3AAmong them, the reference signal period 312 is before the modulation signal period 314, but the present application does not limit the order of these two periods. Figure 3A There is no turnaround period between the reference signal period 312 and the modulation signal period 314 , but the present application does not limit these two periods to be directly adjacent or to include other periods in between.

[0103] In one embodiment, in order to facilitate the calculation of the touch processing device 110, the amplitude of the electrical signal of the reference signal period 312 and the modulation signal period 314 can be the same, but the present application does not limit the two to be the same. The first duty ratio DC1 of the reference signal period 312 is fixed, while the second duty ratio DC2 of the modulation signal period 314 changes in response to the sensing value to be transmitted. The sensing value to be transmitted can correspond to the ratio value R of the first duty ratio DC1 and the second duty ratio DC2. The ratio value R can be one of the following: DC1 / DC2, DC2 / DC1, DC1 / (DC1+DC2), DC2 / (DC1+DC2), (DC1-DC2) / DC2, (DC1-DC2) / DC1, etc. Ordinary people in this field can understand that the denominator of the ratio value is not zero and is not limited to the above-mentioned ratio calculation method. Since the ratio value R corresponds to the known sensing value, the first duty ratio DC1 is also a fixed value known in advance, so the controller 210 can calculate the second duty ratio DC2 according to the ratio value R and the first duty ratio DC1. Next, the controller 210 may enable the signal modulator 230 to issue a modulation signal having a second duty ratio DC2.

[0104] Please refer to Figure 3B , which is a timing diagram of electrical signal transmission according to an embodiment of the present application. Figure 3A compared to, Figure 3B The plurality of signal transmission periods 310 are not continuous. Other signal transmission periods, signal receiving periods or blank periods of unfixed lengths may be arranged between two signal transmission periods 310.

[0105] Please refer to Figure 3C , which is a timing diagram of electrical signal transmission according to an embodiment of the present application. Figure 3B compared to, Figure 3C After receiving the beacon signal sent by the touch panel or screen 120, the stylus 130 arranges a signal transmission period 310 to send out an electrical signal accordingly.

[0106] Please refer to Figure 4A As shown, it is a timing diagram of electrical signal transmission according to an embodiment of the present application. Figure 4AThe top timing diagram is an example of a reference signal period 312. The reference signal period 312 includes four square waves, and the first working ratio DC1 is 50%. It can be understood by those skilled in the art that although Figure 4A A square wave is shown, but it can also be replaced by a sine wave. In addition, the first duty ratio DC1 can also be other ratios.

[0107] Figure 4A The middle timing diagram shows the maximum second duty ratio DC2 of the modulation signal period 314, and the lower timing diagram shows the minimum second duty ratio DC2 of the modulation signal period 314. Figure 4A In the embodiment of the present invention, the ratio value R corresponding to the measured value can be DC2 / DC1. When the second working ratio DC2 is the largest, that is, 50%. At this time, the ratio value R of DC2 / DC1 is 1, that is, 100%. When the second working ratio DC2 is the smallest, that is, 0%. At this time, the ratio value R of DC2 / DC1 is 0, that is, 0%. When calculated to two decimal places, the ratio value R can correspond to the range of 0 to 100. When calculated to three decimal places, the ratio value R can correspond to the range of 0 to 1000.

[0108] In one embodiment, the touch processing device 110 does not need to measure the second duty ratio DC2 of the modulation signal period 314, but can obtain the above-mentioned ratio value R by measuring the signal strength of the reference signal period 312 and the modulation signal period 314. For example, when the sensing circuit 113 measures the signal strength of the reference signal period 312, a first signal strength value can be obtained. The signal strength value can correspond to the sum of the areas on the line. When the sensing circuit 113 measures Figure 4A When the maximum signal strength of the modulation signal period 314A is reached, the maximum second signal strength value can be obtained. Since the ratio value r of the second signal strength value / the first signal strength value is equal to 1, it is also equal to the ratio value R of DC2 / DC1 mentioned above. Figure 4A When the minimum signal strength of the modulation signal period 314B shown below is obtained, the minimum second signal strength value can be obtained to be 0. Since the ratio value r of the second signal strength value / the first signal strength value is equal to 0, it is equivalent to the ratio value R of DC2 / DC1 mentioned above. When calculated to two decimal places, the ratio value r can correspond to the range of 0 to 100. When calculated to three decimal places, the ratio value r can correspond to the range of 0 to 1000. Since the ratio value r of the signal strength can be equivalent to the ratio value R of the working ratio, the present application does not limit which ratio value the touch processing device is to measure.

[0109] Please refer to Figure 4B, which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 4A As in the embodiment shown, Figure 4B The diagram includes three timing diagrams. The top timing diagram is an example of the reference signal period 312. The middle timing diagram is a timing diagram of the signal with the maximum second duty ratio of the modulation signal period 314C. The bottom timing diagram is still a timing diagram of the signal with the minimum second duty ratio of the modulation signal period 314B. Figure 4A Compared with the modulation signal period 314A shown, Figure 4B The square wave phase of the modulation signal period 314C is delayed by 180 degrees. However, the signal strengths of the modulation signal periods 314A and 314C are the same. Even if the phase angle changes, the touch processing device 130 can still measure the same maximum second signal strength value in the modulation signal period 314C.

[0110] Please refer to Figure 4C , which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 4A As in the embodiment shown, Figure 4C It includes three timing diagrams, the top timing diagram is an example of the reference signal period 312. The middle timing diagram is the signal timing diagram of the maximum second working ratio of the modulation signal period 314D. The timing diagram at the bottom is the signal timing diagram of the minimum second working ratio of the modulation signal period 314E. The maximum second working ratio of the modulation signal period 314D reaches 75%, and the minimum second working ratio of the modulation signal period 314E is also 25%. In other words, the maximum value of the signal strength ratio r of the two time periods is 75% / 50%, and the minimum value is 25% / 50%. The ratio value r is between 1.5 and 0.5. A person of ordinary skill in the art can understand that the above-mentioned ratio value r can be transformed into a ratio value R via a linear conversion function so that its upper and lower limits correspond to between 0% and 100%. For example, R=r-0.5.

[0111] Please refer to Figure 4D , which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 4A As in the embodiment shown, Figure 4DIt includes three timing diagrams, the top timing diagram is an example of the reference signal period 312D. The middle timing diagram is the signal timing diagram of the maximum second working ratio of the modulation signal period 314F. The timing diagram at the bottom is the signal timing diagram of the minimum second working ratio of the modulation signal period 314B. In the reference signal period 312, there are four square waves, and the first working ratio of each square wave is 50%. In the reference signal period 312D, there is only a single square wave, and its first working ratio is 50%. Regardless of whether it is four square waves or a single square wave, since their working ratios are the same, the signal strengths of the reference signal periods 312 and 312D should be the same. Similarly, the second working ratio of the single square wave of the modulation signal period 314F is the same as the second working ratio of the four square waves of the modulation signal periods 314A and 314B. Therefore, the signal strengths of the modulation signal periods 314A, 314B and 314F should be the same. When calculating the signal strength ratio value r of the two periods, Figure 4D The embodiments shown and Figure 4A and Figure 4B are the same.

[0112] from Figure 4D According to the embodiment of FIG. 1 , in addition to the ratio value R of the working ratio, the signal modulator 230 of the stylus pen 130 can control the number of waves in the reference signal period 312 or the modulation signal period 314 to transmit more information. Figure 5A As shown, it is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 3A The signal transmission period 510 of the embodiment shown includes only two periods, and Figure 5A The signal transmission period 510 includes four periods, namely the first reference signal period 312, the first modulation signal period 520, the second reference signal period 312 and the second modulation signal period 530. The order of these four periods can be arbitrarily changed. In this embodiment, in order to facilitate the measurement of signal strength, the time lengths of these four periods are the same. The working proportions of the electrical signals sent by the first reference signal period 312 and the second reference signal period 312 can be the same, which is also known in advance. However, those skilled in the art can understand that the working proportions of the electrical signals sent by the first reference signal period 312 and the second reference signal period 312 can also be different. The working proportions of the first modulation signal period 520 and the second modulation signal period 530 are different. In addition, the wave numbers of the first modulation signal period 520 and the second modulation signal period 530 are also different.

[0113] In one embodiment, the duty ratio of the first modulation signal period 520 and the second modulation signal period 530 can be modulated, and the wave number of the first modulation signal period 520 and the second modulation signal period 530 can be modulated to transmit the sensing value. In this way, the resolution of the modulation duty ratio can be reduced. When a three-digit sensing value is to be transmitted, the duty ratio mentioned above can be modulated to transmit two digits, and then the sensing value is transmitted by modulating the wave number. For example, if the value 243 is to be transmitted, the first two values ​​24 and the last value 3 can be transmitted separately. First, by adjusting the duty ratio, the ratio value r1 of the signal strength of the first modulation signal period 520 and the signal strength of the first reference signal period 312 represents an integer value of 24. Then, by adjusting the duty ratio, the ratio value r2 of the signal strength of the second modulation signal period 530 and the signal strength of the second reference signal period 312 is adjusted, where r2 will be r1+1. In this example, r2 will be 25. Then, the wave number w2 emitted by the second modulation signal period 530 is set to 3, so as to represent the last value. Then, the wave number w1 emitted by the first modulation signal period 520 is set to 10-3, that is, 7.

[0114] When the touch processing device 130 receives the electrical signal in the signal transmission period 510, it can detect the aforementioned ratio values ​​r1 and r2, which are 24 and 25 respectively. It can also detect that the wave number w1 is 7 and the wave number w2 is 3. Then, the wave number w1 emitted by the first modulation signal period 520 and the wave number w2 emitted by the second modulation signal period 530, as well as the ratio values ​​r1 and r2 are substituted into the following equation 1, and a value r of 24.3 is obtained. The decimal place of r is the third value 3, and the integer place is the first two values ​​24.

[0115]

[0116] If you want to transmit a sensing value with more digits, you can also use the same method. In another embodiment, assuming that you want to transmit a value of 2433, you can set the ratio values ​​r1 and r2 to 24 and 25 respectively. And the wave number w1 is 2, and the wave number w2 is 1. When it is substituted into equation 1, you can get a value r of 24.33, where the decimal places of r are the third and fourth values ​​33, and the integer places are the first two values ​​24.

[0117] The stylus can use a table lookup or other methods to determine the aforementioned wave numbers w1 and w2. For example, when a one-digit value is to be transmitted, the sum of w1 and w2 can be 10. The wave numbers w1 and w2 can be relatively prime numbers, that is, the greatest common factor of the two is 1. If w1 and w2 are not relatively prime, they can be divided by the greatest common factor to obtain new relatively prime w1 and w2. In another example, when a two-digit value is to be transmitted, the sum of w1 and w2 can be 100. And so on.

[0118] Please refer to Figure 5B , which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 5A Compared with the embodiment shown, Figure 5B A blank period or other electrical signals may be included between the two signal transfer periods 510. The present application is not limited to the signal transfer periods 510 being continuous.

[0119] Please refer to Figure 5C , which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 5B Compared with the embodiment shown, Figure 5C The signal transmission period 510 shown is after the beacon signal emitted by the touch panel or screen 120 is detected, so as to save the power of the stylus 130 to emit invalid electrical signals when it is far away from the touch panel or screen 120 .

[0120] Please refer to Fig. 6A , which is a timing diagram of electrical signal transmission according to an embodiment of the present application. Figure 5A Compared with the embodiment shown, Fig. 6A The signal transmission period 610 shown includes only one reference signal period 312. Therefore, the ratio r1 is the ratio of the signal strength of the first modulation signal period 520 to the signal strength of the reference signal period 312, and the ratio r2 is the ratio of the signal strength of the second modulation signal period 530 to the signal strength of the reference signal period 312.

[0121] Please refer to Figure 6B , which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Fig. 6A Compared with the embodiment shown, Figure 6B A blank period or other electrical signals may be included between the two signal transfer periods 610. The present application is not limited to the signal transfer periods 610 being continuous.

[0122] Please refer to Figure 6C , which is a timing diagram of electrical signal transmission according to another embodiment of the present application. Figure 6B Compared with the embodiment shown, Figure 6C The signal transmission period 610 shown is after the beacon signal emitted by the touch panel or screen 120 is detected, so as to save the power of the stylus 130 to emit invalid electrical signals when it is far away from the touch panel or screen 120 .

[0123] Please refer to Figure 7 As shown, it is a timing diagram of electrical signal transmission according to an embodiment of the present application. Figure 7Three time periods are shown, the upper one is the reference signal time period 312D, the middle one is the first modulation signal time period 520, and the lower one is the second modulation signal time period 530. Figure 7 In the embodiment, the stylus 130 sends out seven waves in the first modulation signal period 520, and the ratio value R1 of the working ratio of each wave to the working ratio of the reference signal period 312D is 24%. The stylus 130 sends out three waves in the second modulation signal period 530, and the ratio value R2 of the working ratio of each wave to the working ratio of the reference signal period 312D is 25%. Therefore, r1 is set to 24, r2 is set to 25, the wave number w1 is set to 7, and the wave number w2 is set to 3. According to the above equation 1, r is calculated to be 24.3. The touch processing device 110 can know that the three-digit value to be transmitted by the stylus 130 is 243.

[0124] Please refer to Figure 8 As shown, it is a flow chart of a method 800 for transmitting a signal value according to an embodiment of the present application. The method 800 can be applied to Figure 1 and Figure 2 The stylus 130 is shown. In one embodiment, the method 800 begins at optional step 810. In another embodiment, the method 800 begins at step 820.

[0125] Optional step 810: Detecting a lighthouse signal. For example, through the electrode of the tip 240 of the stylus 130, the lighthouse signal detector 250 can detect a lighthouse signal from the touch panel or screen 120. Then, the process proceeds to step 820. However, the present application does not limit the order in which steps 810 and 820 are executed. Steps 810 and 820 can be executed in any order or simultaneously. In one embodiment, method 800 must first detect the lighthouse signal in step 810 before the process continues to execute steps 830 and 840.

[0126] Step 820: Receive a signal value. The signal value is generated by a sensor measuring a physical phenomenon, wherein the signal value falls within a numerical range, and the numerical range includes more than three numerical values. For example, Figure 2 In the embodiment of the present invention, after the pressure sensor 220 measures the pressure of the pen tip 240, it transmits the sensed pressure signal value to the controller 210. The value range of the sensed signal value can be 1 to 1024, 1 to 256, or 1 to 16. Then, the process proceeds to step 830. However, the present application does not limit the order in which steps 830 and 840 are executed.

[0127] Step 830: During the reference signal period, an electrical signal having a first duty ratio is emitted, wherein the electrical signal carries information indicating a signal value.

[0128] Step 840: Sending an electrical signal with a second duty ratio during the first modulation signal period.

[0129] The first ratio of the second working ratio to the first working ratio corresponds to the signal value. The first working ratio is a fixed value known in advance, and the electrical signal of the second working ratio is modulated according to the signal value. In one embodiment, the reference signal period is the same length as the modulation signal period, and the maximum amplitude of the electrical signal in the reference signal period is the same as the modulation signal period. However, it can be understood by a person skilled in the art that the length of the reference signal period and the modulation signal period can be different, and the maximum amplitude of the electrical signal in the reference signal period and the modulation signal period can also be different. After executing steps 830 and 840, the process can return to step 810 or 820.

[0130] Please refer to Fig. 9 As shown, it is a flow chart of a method 900 for transmitting a signal value according to an embodiment of the present application. The method 900 can be applied to Figure 1 and Figure 2 The stylus 130 shown. In one embodiment, the method 900 starts at optional step 810. In one embodiment, the method 800 must first detect the beacon signal in step 810 before the process continues to execute steps 830, 940 and 950. In another embodiment, the method 900 starts at step 820. After executing steps 810 and 820, the process can execute step 830. However, the present application does not limit the execution order of steps 830, 940 and 950.

[0131] Step 940: In the first modulation signal period, emit an electrical signal having a second duty ratio and a first wave number.

[0132] Step 950: In the second modulation signal period, emit an electrical signal having a third duty ratio and a second wave number.

[0133] The signal value corresponds to a function of the first ratio, the second ratio, the first wave number and the second wave number, wherein the second ratio is a ratio of the third working ratio to the first working ratio. In one embodiment, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value calculated by equation 1.

[0134] Please refer to Fig.10 , which is a flow chart of a touch processing method 1000 for receiving a signal value according to an embodiment of the present application. The touch processing method 1000 is applicable to Figure 1The touch processing device 110 shown in FIG. can cause the processor module 114 to execute instructions stored in the non-volatile memory to implement the touch processing method 1000 . The touch processing method 1000 starts from the optional step 1010 and can also start from the step 1020 .

[0135] Step 1010: Send a beacon signal. The beacon signal can be sent through multiple touch electrodes of the touch panel or screen 120, or through other antennas or electrodes. Then, the process can proceed to step 1020 or 1030. The present application does not limit the execution order of steps 1020 and 1030.

[0136] Step 1020: During the reference signal period, a first characteristic value of the electrical signal sent by the transmitter is sensed through a plurality of touch electrodes of the touch panel or screen 120. The first characteristic value may be a duty ratio or a sum of signal strengths.

[0137] Step 1030: In the first modulation signal period, the second characteristic value of the electrical signal is sensed by the plurality of touch electrodes. When the first characteristic value is the duty ratio, the second characteristic value is also the duty ratio. When the first characteristic value is the sum of the signal strengths, the second characteristic value is also the sum of the signal strengths.

[0138] Step 1040: Calculate the signal value carried by the electrical signal according to the ratio of the second eigenvalue to the first eigenvalue. Then, the method 1000 may return to the optional step 1010, or step 1020 or 1030.

[0139] Please refer to Fig.11 , which is a flow chart of a touch processing method 1100 for receiving a signal value according to an embodiment of the present application. The touch processing method 1100 is applicable to Figure 1 The touch processing device 110 shown in the figure can make the processor module 114 execute the instructions stored in the non-volatile memory to implement the touch processing method 1100. The touch processing method 1000 starts from the optional step 1010 and can also start from the step 1020. The present application does not limit the order of steps 1020, 1130 and 1140.

[0140] Step 1130: In the first modulation signal period, the second characteristic value and the first wave number of the electrical signal are sensed by the plurality of touch electrodes. When the first characteristic value is the duty ratio, the second characteristic value is also the duty ratio. When the first characteristic value is the sum of the signal strengths, the second characteristic value is also the sum of the signal strengths.

[0141] Step 1140: In the second modulation signal period, the third characteristic value and the second wave number of the electrical signal are sensed by the plurality of touch electrodes. When the first characteristic value is the duty ratio, the third characteristic value is also the duty ratio. When the first characteristic value is the sum of the signal strengths, the third characteristic value is also the sum of the signal strengths.

[0142] Step 1150: Calculate the signal value according to a function of a first ratio of the second eigenvalue to the first eigenvalue, a second ratio of the third eigenvalue to the first eigenvalue, the first wave number and the second wave number. In one embodiment, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0143] According to one aspect of the present application, a transmitter for transmitting a signal value is provided. The transmitter includes: a signal modulator for transmitting an electrical signal through an electrode, wherein the electrical signal carries information indicating the signal value; and a controller connected to the signal modulator, for causing the signal modulator to transmit the electrical signal having a first duty ratio in a reference signal period, and causing the signal modulator to transmit the electrical signal having a second duty ratio in a modulation signal period, wherein a first ratio value of the second duty ratio to the first duty ratio corresponds to the signal value, wherein the reference signal period is the same length as the modulation signal period, and wherein the maximum amplitude of the electrical signal in the reference signal period is the same as that in the modulation signal period.

[0144] Furthermore, in order to simplify the design of the transmitter and the touch processing device, the first duty ratio is a fixed value known in advance, and the controller modulates the electrical signal of the second duty ratio according to the signal value.

[0145] Furthermore, in order to transmit the signal value sensed by the sensor of the transmitter, the transmitter further includes: a sensor for measuring a physical phenomenon to generate the signal value, wherein the signal value falls within a numerical range, and the numerical range includes more than three numerical values.

[0146] Furthermore, in order to transmit the pressure value exerted on the tip of the stylus when in use, the transmitter is the stylus, the electrode is the tip electrode of the stylus, the sensor is used to measure the pressure exerted on the tip electrode, and the signal value is the pressure value generated by the sensor.

[0147] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is away from the touch panel or screen, the transmitter further includes: a lighthouse signal sensor connected to the controller, for notifying the controller after detecting the lighthouse signal, wherein the controller, after receiving the notification from the lighthouse signal sensor, enables the signal modulator to emit the electrical signal with the first duty ratio in the reference signal time period, and enables the signal modulator to emit the electrical signal with the second duty ratio in the modulation signal time period.

[0148] Furthermore, in order to utilize the lighthouse signal to synchronize the stylus pen with each time period of the touch processing device, the transmitter is the stylus pen, the electrode is the tip electrode of the stylus pen, and the lighthouse signal sensor detects the lighthouse signal emitted by the touch panel via the tip electrode.

[0149] Furthermore, in order to utilize the second modulation method to transmit more signal value information within the same time, the controller is further used to enable the signal modulator to emit the electrical signal having a third duty ratio in another modulation signal time period, the electrical signal emitted in the modulation signal time period has a first wave number, and the electrical signal emitted in the other modulation signal time period has a second wave number, wherein the signal value corresponds to a function of the first proportion value, the second proportion value, the first wave number and the second wave number, and the second proportion value is the proportion value of the third duty ratio to the first duty ratio.

[0150] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0151] According to one aspect of the present application, a method for transmitting a signal value is provided. The method comprises: in a reference signal period, an electrical signal having a first duty ratio is emitted through an electrode, wherein the electrical signal carries information indicating the signal value; and in a modulation signal period, the electrical signal having a second duty ratio is emitted, wherein a first ratio value of the second duty ratio to the first duty ratio corresponds to the signal value, wherein the length of the reference signal period is the same as that of the modulation signal period, and wherein the maximum amplitude of the electrical signal in the reference signal period is the same as that in the modulation signal period.

[0152] Furthermore, in order to simplify the design of the transmitter and the touch processing device, the first duty ratio is a fixed value known in advance, and the electrical signal of the second duty ratio is modulated according to the signal value.

[0153] Furthermore, in order to transmit the signal value sensed by the sensor of the transmitter, the signal value is generated by the sensor measuring a physical phenomenon, wherein the signal value falls within a numerical range, and the numerical range includes more than three numerical values.

[0154] Furthermore, in order to transmit the pressure value exerted on the tip of the stylus when in use, the electrode is a stylus tip electrode, the sensor is used to measure the pressure exerted on the tip electrode, and the signal value is the pressure value generated by the sensor.

[0155] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is far away from the touch panel or screen, the method further includes: detecting a lighthouse signal; and after detecting the lighthouse signal, emitting an electrical signal having a first duty ratio in the reference signal period, and emitting the electrical signal having a second duty ratio in the modulation signal period.

[0156] Furthermore, in order to utilize the lighthouse signal to synchronize the stylus pen with the touch processing device in each time period, the electrode is the tip electrode of the stylus pen, and the lighthouse signal detection step is to detect the lighthouse signal emitted by the touch panel by the tip electrode.

[0157] Furthermore, in order to utilize the second modulation method to transmit more signal value information within the same time, the method further includes: emitting the electrical signal having a third working ratio in another modulation signal time period, the electrical signal emitted in the modulation signal time period has a first wave number, and the electrical signal emitted in the other modulation signal time period has a second wave number, wherein the signal value corresponds to a function of the first ratio value, the second ratio value, the first wave number and the second wave number, and the second ratio value is the ratio value of the third working ratio to the first working ratio.

[0158] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0159] According to one aspect of the present application, a touch processing device for receiving a signal value is provided. The touch processing device includes: a sensing circuit module, which is used to connect to multiple touch electrodes of a touch panel to detect an electrical signal sent by a transmitter, wherein the electrical signal carries information representing the signal value; and a processor module, which is connected to the sensing circuit module, which is used to execute instructions in a non-volatile memory to implement the following steps: allowing the sensing circuit module to sense the first characteristic value of the electrical signal in a reference signal period; allowing the sensing circuit module to sense the second characteristic value and the first wave number of the electrical signal in a first modulation signal period; allowing the sensing circuit module to sense the third characteristic value and the second wave number of the electrical signal in a second modulation signal period; calculating a first ratio value of the second characteristic value to the first characteristic value, and calculating a second ratio value of the third characteristic value to the first characteristic value; and calculating the signal value according to a function of the first ratio value, the second ratio value, the first wave number, and the second wave number.

[0160] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0161] Furthermore, to facilitate the processing of the touch processing device, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0162] Furthermore, in order to restore the original modulation characteristics of the electrical signal emitted by the stylus, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the working proportions of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0163] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is far away from the touch panel or screen, the touch processing device further includes: a driving circuit module connected to the multiple touch electrodes and the processor module, wherein the processor module is further used to execute instructions in the non-volatile memory to implement the following steps: before sensing the first characteristic value, the second characteristic value and the third characteristic value, the driving circuit module emits a lighthouse signal through the multiple touch electrodes.

[0164] According to one aspect of the present application, a touch control system for receiving a signal value is provided. The touch control system comprises: a touch control panel including a plurality of touch control electrodes; and the aforementioned touch control processing device.

[0165] Furthermore, in order to maintain the integrity and compatibility of the touch system, the touch system further includes the transmitter for sending the electrical signal.

[0166] According to one aspect of the present application, a touch processing method for receiving a signal value is provided. The touch processing method includes: in a reference signal period, sensing a first characteristic value of an electrical signal sent by a transmitter by means of a plurality of touch electrodes of a touch panel; in a first modulation signal period, sensing a second characteristic value and a first wave number of the electrical signal; in a second modulation signal period, sensing a third characteristic value and a second wave number of the electrical signal; calculating a first ratio value of the second characteristic value to the first characteristic value, and calculating a second ratio value of the third characteristic value to the first characteristic value; and calculating the signal value according to a function of the first ratio value, the second ratio value, the first wave number, and the second wave number.

[0167] Furthermore, in order to reduce the number of waves emitted to save electricity, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the value of equation 1.

[0168] Furthermore, to facilitate the processing of the touch processing device, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0169] Furthermore, in order to restore the original modulation characteristics of the electrical signal emitted by the stylus, the first characteristic value, the second characteristic value, and the third characteristic value are respectively the working proportions of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

[0170] Furthermore, in order to prevent the stylus from emitting electrical signals and wasting power unnecessarily when the stylus is far away from the touch panel or screen, the touch processing method further includes: before sensing the first characteristic value, the second characteristic value and the third characteristic value, emitting a beacon signal through the multiple touch electrodes.

[0171] According to the touch processing method, device and touch system provided by the present application, the sensing signal value on the stylus can be transmitted to the touch processing device through the electrical signals of more than two time periods. Since the electrical signals of the reference signal time period are used as reference, the obtained signal strength or the ratio of the working ratio will not be affected by the touch electrode density at the location where the stylus is located. In addition, the electrical signal can be modulated in two ways at the same time to transmit more information in the same time.

[0172] The implementation methods of this application specification are not intended to limit the scope of the patent application. A person of ordinary skill in the art may make various changes or improvements to the implementation methods. The technical features described in a certain embodiment may also be applied to other embodiments under the premise of technical non-contradiction. Elements or steps with the same name but corresponding to different reference symbols between embodiments may also have the same technical features. As long as there is no causal relationship between the actuating mechanisms or steps of the processes of the various elements in the scope of the patent application, the specification or the drawings, they may be implemented in any sequence. The parts of the diagram may not be drawn according to their relative sizes. In order to highlight certain parts, the scale of the part may be different from the scale of other parts. And irrelevant details may not be fully drawn to make the diagram neat.

Claims

1. A touch processing device for receiving a signal value, characterized in that: Include: A sensing circuit module, used to connect to a plurality of touch electrodes of the touch panel to detect an electrical signal sent by the transmitter, wherein the electrical signal carries information indicating a signal value; as well as The processor module is connected to the sensing circuit module and is used to execute instructions in the non-volatile memory to implement the following steps: Allowing the sensing circuit module to sense a first characteristic value of the electrical signal during a reference signal period; Allowing the sensing circuit module to sense the second characteristic value and the first wave number of the electrical signal in the first modulation signal period; Allowing the sensing circuit module to sense a third characteristic value and a second wave number of the electrical signal in a second modulation signal period; Calculating a first ratio value between the second eigenvalue and the first eigenvalue, and calculating a second ratio value between the third eigenvalue and the first eigenvalue; as well as The signal value is calculated according to a function of the first ratio value, the second ratio value, the first wave number and the second wave number, the first wave number and the second wave number are mutually prime numbers, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the following values:

2. The touch processing device according to claim 1, characterized in that: The first characteristic value, the second characteristic value, and the third characteristic value are signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period, respectively.

3. The touch processing device according to claim 1, characterized in that: The first characteristic value, the second characteristic value, and the third characteristic value are respectively the duty ratios of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

4. The touch processing device according to claim 1, characterized in that: Also includes: The driving circuit module is connected to the plurality of touch electrodes and the processor module, wherein the processor module is further used to execute instructions in the non-volatile memory to implement the following steps: Before sensing the first characteristic value, the second characteristic value and the third characteristic value, the driving circuit module is enabled to send out a beacon signal through the plurality of touch electrodes.

5. A touch control system for receiving a signal value, characterized in that: Include: A touch panel comprising a plurality of touch electrodes; and A touch processing device, comprising: A sensing circuit module, used for connecting the plurality of touch electrodes to detect an electrical signal sent by the transmitter, wherein the electrical signal carries information indicating a signal value; as well as The processor module is connected to the sensing circuit module and is used to execute instructions in the non-volatile memory to implement the following steps: Allowing the sensing circuit module to sense a first characteristic value of the electrical signal during a reference signal period; Allowing the sensing circuit module to sense the second characteristic value and the first wave number of the electrical signal in the first modulation signal period; Allowing the sensing circuit module to sense a third characteristic value and a second wave number of the electrical signal in a second modulation signal period; Calculating a first ratio value between the second eigenvalue and the first eigenvalue, and calculating a second ratio value between the third eigenvalue and the first eigenvalue; as well as The signal value is calculated according to a function of the first ratio value, the second ratio value, the first wave number and the second wave number, the first wave number and the second wave number are mutually prime numbers, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the following values:

6. The touch control system for receiving a signal value according to claim 5, characterized in that: Also includes: The transmitter that sends the electrical signal.

7. The touch control system for receiving a signal value according to claim 5, characterized in that: The first characteristic value, the second characteristic value, and the third characteristic value are signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period, respectively.

8. The touch control system for receiving a signal value according to claim 5, characterized in that: The first characteristic value, the second characteristic value, and the third characteristic value are respectively the duty ratios of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

9. The touch control system for receiving a signal value according to claim 5, characterized in that: The touch processing device further comprises: The driving circuit module is connected to the plurality of touch electrodes and the processor module, wherein the processor module is further used to execute instructions in the non-volatile memory to implement the following steps: Before sensing the first characteristic value, the second characteristic value and the third characteristic value, the driving circuit module is enabled to send out a beacon signal through the plurality of touch electrodes.

10. A touch processing method for receiving a signal value, characterized in that: Include: In the reference signal period, a first characteristic value of the electrical signal sent by the transmitter is sensed by a plurality of touch electrodes of the touch panel; In a first modulation signal period, sensing a second characteristic value and a first wave number of the electrical signal; In a second modulation signal period, sensing a third characteristic value and a second wave number of the electrical signal; Calculating a first ratio value between the second eigenvalue and the first eigenvalue, and calculating a second ratio value between the third eigenvalue and the first eigenvalue; as well as The signal value is calculated according to a function of the first ratio value, the second ratio value, the first wave number and the second wave number, the first wave number and the second wave number are mutually prime numbers, the greatest common divisor of the first wave number and the second wave number is 1, and the function is related to the following values:

11. The touch processing method for receiving a signal value according to claim 10, characterized in that: The first characteristic value, the second characteristic value, and the third characteristic value are signal strengths of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period, respectively.

12. The touch processing method for receiving a signal value according to claim 10, characterized in that: The first characteristic value, the second characteristic value, and the third characteristic value are respectively the duty ratios of the electrical signal in the reference signal period, the first modulation signal period, and the second modulation signal period.

13. The touch processing method for receiving a signal value according to claim 10, characterized in that: Also includes: Before sensing the first characteristic value, the second characteristic value and the third characteristic value, a beacon signal is emitted through the plurality of touch electrodes.

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