WO2020047777A1 - 触控感应方法、触控芯片、电子设备以及触控*** - Google Patents

触控感应方法、触控芯片、电子设备以及触控*** Download PDF

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Publication number
WO2020047777A1
WO2020047777A1 PCT/CN2018/104209 CN2018104209W WO2020047777A1 WO 2020047777 A1 WO2020047777 A1 WO 2020047777A1 CN 2018104209 W CN2018104209 W CN 2018104209W WO 2020047777 A1 WO2020047777 A1 WO 2020047777A1
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WO
WIPO (PCT)
Prior art keywords
touch
detection signal
stylus
intensity
touch screen
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Application number
PCT/CN2018/104209
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English (en)
French (fr)
Inventor
毛志敏
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 PCT/CN2018/104209 priority Critical patent/WO2020047777A1/zh
Priority to EP18914935.4A priority patent/EP3640775B1/en
Priority to CN201880001284.2A priority patent/CN111164553B/zh
Priority to US16/664,775 priority patent/US10996802B2/en
Publication of WO2020047777A1 publication Critical patent/WO2020047777A1/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
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • 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
    • G06F3/041—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
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • 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 the field of touch technology, and in particular, to a touch sensing method, a touch chip, an electronic device, and a touch system.
  • Touch input replaces traditional keyboard input, providing users with a convenient and fast input method when using electronic devices such as mobile phones and tablet computers.
  • a touch pen in addition to directly performing touch operations on the touch screen by hand, in order to further improve the user experience, a touch pen can also be used to perform touch operations on the touch screen.
  • the stylus can be divided into a passive stylus and an active stylus according to whether a power source is used.
  • a passive stylus pen simply simulates a human finger with a conductive object (conductor or conductive rubber, etc.), forming a capacitor between the pen tip and the conductive screen driving conductive strip, in order to affect the detection result of the touch screen.
  • an active stylus is provided with a power source therein, and there may be two kinds of it specifically: an inductive pen (EMR) and a capacitive stylus.
  • EMR inductive pen
  • An inductive pen requires a layer of inductive sensor on the touch screen, and additional hardware is required to implement the writing function.
  • the capacitive stylus does not need to add an inductive sensor, and can be directly used in the existing market.
  • the capacitive stylus has a signal generation module, which can generate multiple sinusoidal or square wave signals with different frequencies. The signal is coupled to the driving channel and the sensing channel of the touch screen for the touch chip to detect its position.
  • one of the technical problems solved by the embodiments of the present application is to provide a touch sensing method, a touch chip, an electronic device, and a touch system to overcome the above defects in the prior art.
  • An embodiment of the present application provides a touch sensing method, which includes:
  • An embodiment of the present application provides a touch chip, which includes a detection module and a processor, where the detection module is configured to detect a touch detection signal transmitted between a current time of a stylus pen and a touch screen to determine the touch
  • the intensity of the detection signal is used by the processor to determine whether the intensity of the touch detection signal at the current moment is greater than or equal to the acquired intensity threshold. If the intensity of the touch detection signal at the current moment is greater than or equal to the intensity threshold, It is determined that the stylus touches the touch screen at the current moment.
  • An embodiment of the present application provides an electronic device including the touch control chip in the embodiment of the present application.
  • An embodiment of the present application provides a touch system, which includes a stylus pen and an electronic device in the embodiments of the present application.
  • the intensity threshold value of the recorded touch detection signal is obtained, and the strength of the touch detection signal transmitted between the current time of the stylus pen and the touch screen is determined; Control whether the intensity of the detection signal is greater than or equal to the acquired intensity threshold, and if the intensity of the touch detection signal is greater than or equal to the intensity threshold at the current moment, determine that the stylus touches the touch at the current moment Screen, thereby realizing that when the stylus pen approaches the touch screen, as long as it touches the touch screen, it can be determined that the stylus pen touches the touch screen, Further responding to the touch operation improves the user experience.
  • FIG. 1 is a schematic structural diagram of a capacitive touch according to an embodiment of the present application.
  • FIG. 2 is a general structural diagram of a stylus pen in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a circuit function structure of the stylus pen in FIG. 2 according to the embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a touch sensing method according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a touch sensing method according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a touch sensing method according to an embodiment of the present application.
  • Capacitive screens can be divided into two types: surface capacitive and projected capacitive. Surface capacitive touch screen electrodes are drawn from the four corners. The basic principle is to detect the change in capacitance when the conductor is close to sense the position of the touch point. Projected capacitive screens are further divided into mutual capacitances and self-capacitives.
  • a mutual capacitance-based touch screen includes two sets of vertical electrode arrays and a touch screen controller. One electrode array is used as a driving electrode, and the other electrode array is a detection electrode.
  • a mutual capacitance is formed between the driving electrode and the detection electrode.
  • the electrode transmits a driving signal under the driving of the driving module of the touch screen controller, and the detection electrode receives the above driving signal.
  • a grounded conductive object finger, etc.
  • the capacitance value determines a touch point position by detecting a change in the capacitance value of the mutual capacitance.
  • all electrodes form a self-capacitance to the ground.
  • the touch screen controller will drive an electrode, and then detect the change in the capacitance value of the self-capacitance of the electrode to determine whether there is a conductive object grounded nearby and determine the Handle position.
  • FIG. 1 is a schematic structural schematic diagram of capacitive touch according to an embodiment of the present application.
  • a mutual capacitance array touch screen is taken as an example for description.
  • the touch screen controller 101 included in the touch chip includes a driving module 111.
  • a long driving electrode 102 constitutes a driving channel
  • a long detecting electrode 103 constitutes a detecting channel.
  • the driving module 111 sends a driving signal to drive the driving electrodes 102 one by one.
  • the driving electrodes 102 may be X-axis conductive bars, and the Y-axis conductive bars are detection electrodes 103 (in other embodiments, the driving electrodes are Y-axis conductive bars).
  • the detection electrode is an X-axis conductive strip).
  • the driving signal may be a set of pulses (pulse train) or a set of sine waves or a set of triangular waveforms, etc. (only a set of pulse waveforms are shown in FIG. 1), and a set of pulses includes multiple pulses.
  • a driving signal is coupled to the detecting electrode 103 through a mutual capacitance between the driving electrode 102 and the detecting electrode 103. If a conductive object contacts or approaches the driving electrode 102 and the detection electrode 103, the capacitance value of the mutual capacitance between the driving electrode 102 and the detection electrode 103 is changed.
  • the detection module 121 detects the output signals of multiple detection electrodes one by one or in parallel to determine the capacitance value of each mutual capacitance of the mutual capacitance array and the capacitance value when it is in contact with or close to no conductive object (also known as the basic capacitance value). ) Comparison to obtain the capacitance value change image, calculate the position of the conductive object according to the capacitance value change image, and send the coordinates of the position to the host to realize the related touch operation.
  • the driving electrodes 102 and the detection electrodes 103 may be rectangular or diamond-shaped, and the driving electrodes 102 and the detection electrodes 103 in the stripe shape shown in FIG. 1 are merely examples. .
  • FIG. 2 is an overall structural diagram of a stylus pen in an embodiment of the present application.
  • the stylus pen in this embodiment includes a conductive pen tip 201, a pen tip 202, and a pen body 203.
  • FIG. 3 is a schematic diagram of the circuit functional structure of the stylus pen in FIG. 2 according to the embodiment of the present application.
  • the stylus pen includes a power supply (not shown) in FIG. 2
  • the pen body 203 is provided with a signal generating module 204, a pressure sensing device 205, and a microcontroller 206.
  • the conductive pen tip 201 is electrically connected to the signal generating module 204 and the pressure sensing device 205.
  • the conductive pen tip 201 and the pen body 203 are mechanically connected. On the one hand, it serves as a tool for clicking the target area of the touch screen, and on the other hand, it serves as a coupling device to couple the touch detection signal output by the signal generation module 204 to On the electrodes of the touch screen (driving and detecting electrodes), the pressure on the conductive pen tip is sensed by the pressure sensing device 205 to generate pressure characteristic data, which can help determine whether the stylus is in contact with the touch screen.
  • the signal generation module 204 outputs a touch detection signal according to a preset protocol.
  • the touch detection signal may include information such as the pressure characteristic data identified by the pressure sensing device 205. .
  • the intensity threshold of the touch detection signal corresponds to the proximity of the stylus to the touch pen.
  • the pressure characteristic data will change, but the touch The strength of the detection signal remains unchanged.
  • the intensity threshold may be set to be not greater than the intensity of the touch detection signal when the stylus touches the touch screen.
  • the following uses the touch pen shown in FIG. 2 and FIG. 3 to touch the touch screen in FIG. 1 as an example for description.
  • FIG. 4 is a schematic flowchart of a touch sensing method according to an embodiment of the present application; as shown in FIG. 4, it may include the following steps S401-S404:
  • the intensity threshold is specifically recorded (also referred to as stored) locally at the terminal where the touch screen is located.
  • the locally stored intensity threshold is obtained by the touch chip.
  • the touch detection signals coupled to the touch screen electrodes when the stylus touches multiple sampling positions of the touch screen can be collected in advance, and the previously collected touch detection signals can also be referred to as touch Detect signal samples, analyze these touch detection signal samples to determine their average intensity values, and use the average intensity value as the intensity threshold.
  • the foregoing method of determining the intensity threshold by collecting touch detection signals in advance can be specifically completed before the product leaves the factory, or can be collected in advance during use, similar to the process of collecting fingerprint data to establish a fingerprint sample. If the stylus is used to perform a touch operation on the touch screen at the current time t1 (that is, the current time), before the current time t1, the stylus sends the stylus to the touch screen before the current time t1.
  • the signal strength of the touch detection signal of the control screen is recorded, and the average of the recorded signal strength is calculated to obtain the average value of the signal strength.
  • the average value of the signal strength is the above-mentioned intensity threshold, that is, it is used to determine whether the stylus touches the touch Basis for controlling the screen.
  • the intensity threshold corresponds to the amplitude of the voltage signal.
  • a common intensity threshold is set for all touchable positions of the touch screen, that is, regardless of any valid touch position on the touch screen, it must be the same as that in the subsequent step S403.
  • the intensity thresholds are compared.
  • S402 Determine the strength of a touch detection signal transmitted between the current time of the stylus and the touch screen;
  • the transmission may specifically be sending or pulling.
  • the above detection module scans multiple rows of channels simultaneously, including a drive channel and a sensing channel.
  • a coupling capacitance is formed between the conductive pen tip 201 of the stylus and the electrodes (including the driving electrode and the detection electrode) on the touch screen. The closer the electrode of the touch screen is to the conductive pen tip, the larger the coupling capacitance value between the conductive pen tip and the electrode of the touch screen (including the driving electrode or the detection electrode), so that the conductive pen tip 201 is coupled to the touch on the touch screen. The stronger the control detection signal is.
  • the strength of the touch detection signal sent to the touch screen by the current time (t1) of the stylus is determined by the touch chip, and is specifically detected by the detection module in FIG. 1 described above.
  • the touch detection signal sent by the stylus pen is gradually coupled to the electrodes in the touch screen through the conductive pen tip, thus causing a touch.
  • the touch detection signals received by the electrodes in the control screen are getting larger and larger.
  • the detection module in FIG. 3 can be used to scan the electrodes in the touch screen in real time and determine the strength of the touch detection signal received by the electrodes.
  • the intensity of the signal received by the electrode is calculated to obtain an intensity difference value.
  • the intensity difference value is the intensity of the touch detection signal sent by the stylus pen to the electrodes in the touch screen.
  • the intensity difference may be compared with the intensity threshold. If the comparison result is close to 0, it may be determined that the intensity of the touch detection signal is greater than or equal to the acquired intensity threshold.
  • the above determination process can be implemented by directly comparing the amplitudes of the voltage signals.
  • the above comparison process may be implemented in a hardware or software manner.
  • the contact includes a first contact and a full contact with the touch screen after the first contact. Specifically, if the intensity of the touch detection signal is equal to the intensity threshold at the current moment, it can be determined that the stylus touches the touch screen for the first time from far and near. If the intensity of the touch detection signal is greater than the intensity threshold at the current moment, it can be determined that the stylus pen fully touches the touch screen from far and near.
  • FIG. 5 is a schematic flowchart of a touch sensing method according to an embodiment of the present application; as shown in FIG. 5, it includes:
  • step S501 Determine whether a touch detection signal sent by the stylus is detected, and if yes, perform step S502;
  • step S501 is determined by the detection module in FIG. 1.
  • the detection module in the touch chip scans the electrodes one by one when the stylus approaches or touches the touch screen during use.
  • the pen tip is relatively far away, and the strength of the touch detection signal coupled to the electrode is relatively weak. If it is outside the effective detection range of the detection module, the detection module cannot even detect the touch detection signal.
  • the detection module detects the touch detection signal, and its intensity gradually increases.
  • a driving signal is provided to the driving electrodes through a driving module in the touch screen, and then the touch position is determined by referring to the change in the capacitance of the mutual capacitance described in the above-mentioned touch detection principle in FIG. 1.
  • the touch detection signal output by the signal generating module 204 preferably has a high intensity.
  • the touch detection signal is a voltage signal
  • the corresponding circuit design also needs to withstand 40v.
  • the touch screen is divided into a plurality of effective touch areas, and one intensity threshold is configured for each effective touch area.
  • the correspondence between the effective touch area and the intensity threshold can be reflected in the form of an index table.
  • an identifier is assigned to each effective touch area, and the corresponding effective touch area is associated with an intensity threshold by the identifier.
  • the effective touch areas can be specifically distinguished by the covered driving electrodes and detection electrodes.
  • S504. Determine the strength of the touch detection signal transmitted between the current time of the stylus and the touch screen
  • the pressure detection module in the stylus outputs valid pressure characteristic data, it is an aid to indicate that the stylus touches the touch screen, and the detection module detects the intensity of the touch detection signal at this time.
  • the intensity difference value can be compared with the intensity threshold. If the comparison result is close to 0, it can be determined that the touch detection signal is approximately equal to the acquired intensity. Threshold. When the comparison result exceeds 0, it can be determined that the touch detection signal is larger than the obtained intensity threshold.
  • the above determination process can be implemented by directly comparing the amplitudes of the voltage signals.
  • the above comparison process may be implemented in a hardware or software manner.
  • the contact includes the first contact, and also includes the full contact with the touch screen after the first contact. Specifically, if the intensity of the touch detection signal is equal to the intensity threshold at the current moment, it can be determined that the stylus touches the touch screen for the first time from far and near. If the intensity of the touch detection signal is greater than the intensity threshold at the current moment, it can be determined that the stylus pen fully touches the touch screen from far and near.
  • FIG. 6 is a schematic flowchart of a touch sensing method according to an embodiment of the present application; as shown in FIG. 6, it includes:
  • step S601. Determine whether a touch detection signal sent by the stylus is detected, and if yes, perform step S602; otherwise, perform step S607B;
  • step S601 is similar to step S501 in the embodiment of FIG. 5 described above. That is, during the process of using the stylus pen near or touching the touch screen, the detection module in the touch chip scans the electrodes. It is far away from the conductive pen tip of the stylus, and the touch detection signal strength is weak when detected from the electrode, that is to say, it is not within the range that the detection module can effectively detect, or the signal cannot be detected by the detection module. When the conductive pen tip approaches the electrode, the detection module detects a touch detection signal on the electrode, and its intensity gradually increases.
  • S602. Determine the touch position of the stylus on the touch screen.
  • the position of the touch pen on the touch screen is determined by combining the principle of determining the touch position shown in FIG. 1 above.
  • the conductive pen tip of the stylus when the conductive pen tip of the stylus is in contact with the touch screen, the conductive pen tip will be subjected to a certain pressure.
  • the pressure sensing device wakes up the microcontroller in the sleep state.
  • the microcontroller determines the magnitude of the pressure by receiving the pressure characteristic data generated by the pressure sensing device. Further, the microcontroller controls the signal generation module to encode the pressure characteristic data into the touch detection signal according to a set protocol.
  • the pressure sensing device does not sense pressure within a set period of time, no pressure characteristic data is generated, and the microcontroller enters a sleep state to save power consumption.
  • the touch chip can analyze the touch detection signal detected by the detection module to determine whether the pressure characteristic is included therein. Data, if the pressure detection device generates pressure characteristic data, it can be considered that the stylus touches the touch screen; otherwise, it indicates that the pressure detection device does not generate pressure characteristic data, that is, the stylus does not touch the touch screen.
  • whether the pressure detection device generates pressure characteristic data is essentially only related to the stylus touching the touch screen, and has nothing to do with other reasons, such as the failure of the pressure detection device due to other reasons such as the failure of the pressure detection device. A situation where pressure characteristic data is generated; or, it is impossible to determine whether the pressure detection data is included in the touch detection signal due to a failure of the detection module.
  • step S604A Determine whether a preset intensity threshold value of the touch detection signal corresponding to the touch position is successfully acquired; if yes, perform step S605A; otherwise, perform step S605B;
  • step S604A may be performed by the touch chip, because the intensity threshold of the touch detection signal may be recorded in advance locally on the electronic device to which the touch chip is applied.
  • the touch chip first needs to obtain the intensity threshold of the touch detection signal locally from the electronic device. Further, according to whether the result is successfully obtained, the subsequent steps are performed to finally determine whether to respond to the stylus. The touch operation on the touch screen at the current time still does not respond to the touch operation on the touch screen at the current time of the stylus.
  • the touch area of the touch screen is divided into multiple effective touch areas, and each effective touch area corresponds to one of the intensity thresholds, that is, for each Each effective touch area is configured with one of the above-mentioned intensity thresholds.
  • the correspondence between the effective touch area and the intensity threshold can be reflected in the form of an index table. For example, an identifier is assigned to each effective touch area, and the corresponding effective touch area is associated with an intensity threshold by the identifier. It should be noted that the effective touch areas can be specifically distinguished by the covered driving electrodes and sensing electrodes.
  • the coordinates of the current touch point and the coordinates of the effective touch area are compared to determine the effective touch area of the current touch position at the current time. To obtain the intensity threshold of the corresponding touch detection signal.
  • step S604B Determine whether a preset intensity threshold value of the touch detection signal corresponding to the touch position is successfully obtained; if yes, go to step S606; otherwise, perform step S607A.
  • step S607A it is convenient to determine whether the stylus touches the touch screen at the next moment, and the intensity threshold of the touch detection signal is set in real time. If not, the subsequent step S607A , It will be determined from the pressure characteristic data that the stylus has been in contact with the touch screen, and an intensity threshold value of a touch detection signal is configured for the stylus at the touch position of the touch screen, so that the stylus is next Determine whether the touch position is reached, and further obtain an intensity threshold of a touch detection signal configured for the touch position.
  • S605A Determine whether the intensity threshold of the touch detection signal is reached; if yes, execute step S606; otherwise, execute step S605B;
  • step S605A is similar to the above embodiment.
  • S605B Does not respond to the operation of the stylus on the touch screen
  • the touch chip does not send the coordinates of the touch position to the host, or the host does not receive the coordinates of the touch position sent by the touch chip, and further does not respond to the operation of the stylus on the touch screen. It means that the stylus is not in effective contact with the touch screen.
  • step S605B is mainly based on judging whether the stylus has made effective contact with the touch screen through the above-mentioned intensity threshold, and does not consider other reasons such as the touch chip not successfully sending the touch position.
  • the coordinates, or the touch chip sent the coordinates of the touch position, but the host did not receive the coordinates of the touch position sent by the touch chip due to the host failure.
  • S606 Respond to the operation of the stylus on the touch screen
  • the host can implement the touch operation function, such as writing on the touch screen with a stylus (making the stylus "water”), etc. Any gesture operation.
  • a timing retransmission mechanism can be set to solve the sending or receiving of the coordinates of the touch position until the host successfully receives the coordinates of the touch position sent by the touch chip.
  • a threshold for the number of retransmissions may be defined in the retransmission mechanism. If the number of retransmissions exceeds the threshold, the process may jump to step S607B to end the processing flow at the current time.
  • S607A Record the detected intensity value of the touch detection signal at the touch position as the intensity threshold, and jump to step S606.
  • next time t2 it is equivalent to set before the step S601, before obtaining the recorded touch detection signal intensity threshold, according to the pressure characteristic data applied by the stylus to the touch screen at the current time.
  • the intensity threshold of the touch detection signal for the next time t2 is recorded. That is, the intensity of a touch detection signal transmitted between the stylus pen and the touch screen during the touch operation on the touch screen by the stylus pen at the current time t1, sets and records the next time t2.
  • the threshold of the intensity of the touch detection signal is
  • the signal intensity of the touch detection signal corresponding to when the stylus is in contact with any one of the positions of each effective touch area can be selected as the general use for the The intensity threshold of the touch detection signal in the touch area.
  • the detection process is repeated. In order to avoid falling into an endless loop, you can set the number of repeated detections. When the set number of times is reached, the intensity of the touch detection signal has not been detected to be greater than the set intensity threshold, then the current process is ended without responding to the current time of the stylus Operations on the touch screen. After that, the processing procedure of the foregoing method embodiment is continued at the next moment.
  • An embodiment of the present application provides a touch chip, which includes a detection module and a processor, where the detection module is configured to detect a touch detection signal transmitted between a current time of a stylus pen and a touch screen to determine the touch
  • the intensity of the detection signal is used by the processor to determine whether the intensity of the touch detection signal at the current moment is greater than or equal to the acquired intensity threshold. If the intensity of the touch detection signal at the current moment is greater than or equal to the intensity threshold, It is determined that the stylus touches the touch screen at the current moment.
  • An embodiment of the present application further provides an electronic device including the above-mentioned touch chip.
  • the touch is updated. Controls the intensity threshold of the detection signal. Specifically, if it is determined that the intensity of the touch detection signal is still less than its intensity threshold after the several judgments, it indicates that the intensity threshold is set too large, and a smaller intensity threshold needs to be set.
  • the intensity of the touch detection signal detected by the detection module at the current time t1 may be directly used as the updated intensity threshold, so as to perform the judgment processing of whether the stylus touches the touch shot again at the next time t2.
  • the touch chip can detect the included angle between the stylus and the touch screen.
  • multiple intensity thresholds of the touch detection signals are set at the same touch position, and the touch The intensity threshold of the detection signal is correspondingly associated with different said angles.
  • the signal generating device in the stylus pen When the signal generating device in the stylus pen generates a touch detection signal through coding, it may further include information reflecting the angle between the stylus pen and the touch screen.
  • the touch control chip decodes the touch detection signals to obtain different intensity thresholds of the touch detection signals at different angles. Further, when judging whether the intensity of the touch detection signal is greater than or equal to the intensity threshold of the touch detection signal at the current time, it is first determined that the touch pen at the touch position and the touch screen have an angle between the current time. Compare the intensity of the touch detection signal with the intensity threshold of the touch detection signal at the current moment.
  • the contact may be an actual physical contact, or the stylus pen approaches to form an actual physical contact, for example, the stylus pen and the touch screen have a small distance. If it is a small distance, it can be lower than the intensity of the touch detection signal when the stylus pen and the touch screen make actual physical contact when the intensity threshold is set as described above.
  • the electronic devices in the embodiments of the present application exist in various forms, including but not limited to:
  • Mobile communication equipment This type of equipment is characterized by mobile communication functions, and its main goal is to provide voice and data communication.
  • Such terminals include: smart phones (such as iPhone), multimedia phones, feature phones, and low-end phones.
  • Ultra-mobile personal computer equipment This type of equipment belongs to the category of personal computers, has computing and processing functions, and generally has the characteristics of mobile Internet access.
  • Such terminals include: PDA, MID and UMPC devices, such as iPad.
  • Portable entertainment equipment This type of equipment can display and play multimedia content.
  • Such devices include: audio and video players (such as iPod), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.
  • Server A device that provides computing services.
  • the composition of the server includes processors, hard disks, memory, and system buses.
  • the server is similar to a general-purpose computer architecture, but because it needs to provide highly reliable services, it has high processing power and stability. , Reliability, security, scalability, manageability and other requirements.

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Abstract

一种触控感应方法、触控芯片、电子设备以及触控***，触控感应方法包括：获取记录的触控检测信号的强度阈值(S401)，并确定触控笔当前时刻与触控屏之间传输的触控检测信号的强度(S402)；判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值(S403)，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏(S404A)。上述方法实现了所述触控笔在靠近所述触控屏的过程中确定出所述触控笔接触到所述触控屏以进行了触控操作，进一步对该触控操作进行响应，提高了用户体验。

Description

触控感应方法、触控芯片、电子设备以及触控*** 技术领域
本申请实施例涉及触控技术领域，尤其涉及一种触控感应方法、触控芯片、电子设备以及触控***。
背景技术
触控输入替代传统的键盘输入，为用户在使用电子设备如手机和平板电脑过程中提供了便捷快速的输入方式。
现有技术中，除了可以直接用手去对触控屏进行触控操作，为了进一步提高用户体验，还可以使用触控笔对触控屏进行触控操作。而该触控笔按是否使用电源可以区分为无源触控笔和有源触控笔。无源触控笔是简单地用导电物(导体或导电橡胶等)模拟人类手指，在笔尖和触控屏驱动导电条之间形成一个电容，以便影响触控屏的检测结果。有源触控笔顾名思义在其中设置有电源，其具体可以也有两种：电感笔(EMR)和电容式触控笔。电感笔(EMR)需要在触控屏上加一层电感传感器，需要额外的硬件才能实现书写功能。电容式触控笔，不需要增加电感传感器，可以直接使用在现有市场上的就有电容式触控笔，其内部配置信号发生模块，可以产生多个不同频率的正弦信号或者方波信号，通过将信号耦合到触控屏的驱动通道和感应通道上，以供触控芯片检测其位置。
但是，现有技术中，在使用电容式触控笔过程中，必须施加一定压力后才能实现对触控屏的操作，比如，如果要实现在触控屏上进行书写，只有施加一定压力后电容式触控笔才能“出水”，由此导致缺少真实的书写体验，进一步导致用户体验较差。
发明内容
有鉴于此，本申请实施例所解决的技术问题之一在于提供一种触控感应方法、触控芯片、电子设备以及触控***，用以克服现有技术中的上述缺陷。
本申请实施例提供了一种触控感应方法，其包括：
获取记录的触控检测信号的强度阈值，并确定触控笔当前时刻与触控屏 之间传输的触控检测信号的强度；
判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏。
本申请实施例提供一种触控芯片，其包括：检测模块以及处理器，所述检测模块用于检测触控笔当前时刻与触控屏之间传输的触控检测信号以确定所述触控检测信号的强度，所述处理器用于判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏。
本申请实施例提供一种电子设备，其包括本申请实施例中的触控芯片。
本申请实施例提供一种触控***，其包括触控笔以及本申请实施例中的电子设备。
本申请实施例提供的技术方案中，通过获取记录的触控检测信号的强度阈值，并确定触控笔当前时刻与触控屏之间传输的触控检测信号的强度；判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏，从而实现了所述触控笔在靠近所述触控屏的过程中，只要接触到所述触控屏即可确定出所述触控笔对所述触控屏进行了触控操作，进一步对该触控操作进行响应，提高了用户体验。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本申请实施例的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1为本申请实施例中电容触控的原理结构示意图。
图2为本申请实施例中触控笔的总体结构图。
图3为本申请实施例上述图2中触控笔的电路功能结构示意图。
图4为本申请实施例中一种触控感应方法的流程示意图。
图5为本申请实施例中一种触控感应方法的流程示意图。
图6为本申请实施例中一种触控感应方法的流程示意图。
具体实施方式
实施本申请实施例的任一技术方案必不一定需要同时达到以上的所有优点。
下面结合本申请实施例附图进一步说明本申请实施例具体实现。
在说明本申请之前，先简单说明下触控的工作原理。
触控输入的实现主要依赖于电阻屏和电容屏。相对于电阻屏来说，电容屏具备灵敏度高及易实现多点触控的优点，应用范围较广。电容屏又可以分为表面电容式和投射电容式两种。表面电容式触控屏电极从四角引出，其基本原理也是检测导体靠近时的电容变化来感知触控点位置。投射式电容屏进一步分成互电容(mutual capacitive)和自电容(self capacitive)两种。基于互电容的触控屏包含两组垂直的电极阵列和一触控屏控制器，其一电极阵列作为驱动电极，另一电极阵列为检测电极，驱动电极和检测电极之间形成互电容，驱动电极在触控屏控制器的驱动模块的驱动下发射驱动信号，检测电极接收上述驱动信号，当接地的导电物(手指等)靠近电容屏时，影响驱动电极和检测电极之间的互电容的电容值，通过检测该互电容的电容值变化来确定触控点位置。基于自电容的触控屏，所有电极对地形成自电容，触控屏控制器会驱动一条电极，跟着检测该条电极的自电容的电容值变化来判断附近有没有接地的导电物进而确定触控点位置。
图1为本申请实施例中电容触控的原理结构示意图；如图1所示，以互电容阵列的触控屏为例进行说明，触控芯片包括的触控屏控制器101包括驱动模块111和检测模块121，一个长条状的驱动电极102构成一个驱动通道，一个长条状的检测电极103构成一个检测通道。
本实施例中，驱动模块111发出驱动信号逐条驱动驱动电极102，驱动电极102可以是X轴导电条，Y轴的导电条都是检测电极103(其他实施例中，驱动电极为Y轴导电条，检测电极为X轴导电条)。驱动信号可以是一组脉冲(pulse train)或一组正弦波或一组三角波形，等等(图1中只显示一组脉冲波形)，一组脉冲包含多个脉冲。
当一条驱动电极102被驱动时，驱动信号会透过驱动电极102跟检测电极103之间的互电容耦合到检测电极103。如果有导电物接触或靠近驱动电极 102和检测电极103的话，就会改变驱动电极102和检测电极103之间的互电容的电容值。
进一步地，检测模块121逐条或者多条并行检测多个检测电极的输出信号，确定互电容阵列的每一个互电容的电容值并跟没有导电物接触或靠近时的电容值(又称基础电容值)比较，从而得出电容值变化影像，根据该电容值变化影像计算出导电物的位置，并将该位置的坐标发送给主机实现相关的触控操作。
当然，本领域普通技术人员也可以理解，在其他实施例中，驱动电极102和检测电极103也可以为矩形或者菱形等形状，上述图1中驱动电极102和检测电极103为条状仅仅是示例。
图2为本申请实施例中触控笔的总体结构图，如图2所示，本实施例中的触控笔包括导电笔尖201、笔头202及笔身203。
图3为本申请实施例上述图2中触控笔的电路功能结构示意图，如图3所示，本实施例中，触控笔包括除电源(图中未示出)外，在上述图2中的笔身203内设置有信号发生模块204、压力感应装置205以及微控制器206，导电笔尖201与信号发生模块204和压力感应装置205形成电连接。
本实施中，导电笔尖201与笔身203采用机械式接触性连接，一方面其作为点击触控屏目标区域的工具，另一方面作为耦合装置将信号发生模块204输出的触控检测信号耦合到触控屏的电极上(驱动和检测电极)上，再一方面通过压力感应装置205来感应导电笔尖所受压力的大小，生成压力特征数据，可以辅助判断触控笔是否与触控屏接触。
具体地，信号发生模块204根据预先设置的协议输出触控检测信号，当需要压力感应模块205输出压力特征数据时，该触控检测信号可以含有压力感应装置205所识别到的压力特征数据等信息。
由于触控笔在接触到触控屏之后，电极接收到的所述触控检测信号的强度基本保持不变，因此，所述触控检测信号的强度阈值对应所述触控笔在靠近所述触控屏的过程中接触到所述触控屏时的所述触控检测信号的强度，当触控笔接触到触控屏，继续按压的话，压力特征数据会有变化，但所述触控检测信号的强度保持不变。为此，为了控制触控精度，在设置强度阈值时可以使其不大于当所述触控笔接触到所述触控屏时的所述触控检测信号的强度。
以下结合上述图2、图3所示触控笔对上述图1中的触控屏进行触控为例进行说明。
以下结合上述触控检测原理对本申请实施例的技术方案做示例性说明。
图4为本申请实施例中一种触控感应方法的流程示意图；如图4所示，其可以包括如下步骤S401-S404：
S401、获取记录的触控检测信号的强度阈值；
本实施例中，所述强度阈值具体记录(又称之为存储)在触控屏所在终端的本地，在执行步骤S401时，由触控芯片获取所述本地存储的强度阈值。
本实施例中，可以预先收集当触控笔接触到触控屏的多个采样位置时耦合到触控屏电极的触控检测信号，该预先收集的触控检测信号又可以称之为触控检测信号样本，对这些触控检测信号样本进行分析确定出其平均强度值，并将该平均强度值作为上述强度阈值。
上述通过预先收集触控检测信号来确定上述强度阈值的方式，具体可以在产品出厂前完成，也可以在使用过程中进行预先收集，类似采集指纹数据建立指纹样本的过程。假如在当前时刻t1(即当前时刻)要使用触控笔在触控屏上进行触控操作，则预先将当前时刻t1之前，当触控笔接触到触控屏时由触控笔发送给触控屏的触控检测信号的信号强度记录下来，并对记录的信号强度进行均值计算得到信号强度均值，该信号强度均值即为上述强度阈值，即作为判断当前时刻t1触控笔是否接触到触控屏的依据。
在一具体应用场景中，若触控检测信号为电压信号，则所述强度阈值对应电压信号的幅值。
本实施例中，对于触控屏的所有可触控位置，设置一个通用的强度阈值，即无论触控到触控屏上的任一有效触控位置，均要在后续步骤S403中与同一个强度阈值进行比对。
S402、确定触控笔当前时刻与触控屏之间传输的触控检测信号的强度；
本实施例中，所述传输具体可以为发送或者拉取。上述检测模块同时扫描多行通道，包括驱动通道和感应通道。触控笔的导电笔尖201会与触控屏上的电极(包括驱动电极和检测电极)之间形成耦合电容。触控屏的电极距离导电笔尖越近，导电笔尖和触控屏的电极(包括驱动电极或者检测电极)之间的耦合电容值就越大，从而使得导电笔尖201耦合到触控屏上的触控检测信号也就越强。
本实施例中，由触控芯片确定触控笔当前时刻(t1)发送给触控屏的触控检测信号的强度，具体由上述图1中的检测模块来检测。
具体地，在一具体应用场景中，由于触控笔接近直至与触控屏接触的过 程中，触控笔发出触控检测信号通过导电笔尖逐渐耦合到触控屏中的电极上，因此导致触控屏中的电极接收到的触控检测信号越来越大。基于该原理，在确定触控笔是否接触到触控屏时，可以通过上述图3中的检测模块实时扫描触控屏中的电极并确定电极接收到的触控检测信号的强度，以与无触控笔靠近时电极接收到的信号的强度做差求得强度差值，该强度差值即为触控笔发送给触控屏中电极的触控检测信号的强度。
S403、判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值；若是，则执行步骤S404A，否则，执行S404B结束。
本实施例中，具体可以通过上述强度差值与所述强度阈值进行比较，如果比较结果接近0，则可判定所述触控检测信号的强度大于等于获取到的所述强度阈值。
在一具体应用场景中，如前所述，触控检测信号为电压信号的话，则直接通过电压信号的幅值比较即可实现上述判断过程。
进一步地，本实施例中，上述比较过程可以通过硬件或者软件的方式实现。
S404A、若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏。
S404B、结束。
本实施例中，所述接触包括首次接触，也包括首次接触之后与触控屏的充分接触。具体地，如果当前时刻所述触控检测信号的强度等于所述强度阈值，则可确定触控笔由远及近首次接触到触控屏。如果当前时刻所述触控检测信号的强度大于所述强度阈值，则可确定触控笔由远及近充分接触到触控屏。
如前所述，本实施例中，由于对触控屏上的所有有效触控位置设置一个通用性的强度阈值，因此，简单的通过存在上述等于，还是大于的关系，确定触控笔是首次还是充分接触触控屏。
图5为本申请实施例中一种触控感应方法的流程示意图；如图5所示，其包括：
S501、判断是否检测到触控笔发送的触控检测信号，若是，则执行步骤S502；
本实施例中，如前所述，步骤S501中由图1中的检测模块来判断。为了较容易地进行步骤S501的判断，本实施例中，触控笔在使用时靠近或触碰触控屏过程中，触控芯片中的检测模块逐条扫描电极，当电极距离触控笔的导 电笔尖比较远，触控检测信号耦合到电极的强度比较弱，若位于检测模块的有效检测范围外，检测模块甚至检测不到触控检测信号。当导电笔尖接近电极时，检测模块就会检测到触控检测信号，且其强度逐渐增强。
S502、确定触控笔在触控屏上的触控位置；
本实施例中，通过触控屏中的驱动模块给驱动电极提供驱动信号，再参见上述图1触控检测原理中描述的互电容的电容量变化确定出触控位置。
本实施例中，为了耦合足够强度的触控检测信号到触控屏的电极，信号发生模块204输出的触控检测信号优选具有较高强度，比如若触控检测信号为电压信号的话，则该电压比如40v，相应地电路设计也需要耐压达到40v。
S503、获取预先设置的触控笔接触到对应所述触控位置处时触控检测信号的强度阈值；
本实施例中，在步骤S503中，与上述图4实施例不同的是，将触控屏划分成了若干有效触控区域，针对每个有效触控区域配置了一个上述强度阈值。有效触控区域与强度阈值的对应关系可以通过索引表的形式体现。比如，给每个有效触控区域分配一个标识，通过该标识将对应的有效触控区域与强度阈值对应起来。需要说明的是，有效触控区域之间具体可以通过覆盖的驱动电极和检测电极来区分。
S504、确定触控笔当前时刻与触控屏之间传输的触控检测信号的强度；
本实施例中，如果存在触控笔中的压力检测模块输出了有效的压力特征数据，则辅助表明触控笔接触到了触控屏，则此时检测模块检测触控检测信号的强度。
S505、判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值；如果是，则执行步骤S506A，否则执行步骤S506B；
本实施例中，与上述实施例类似，具体可以通过上述强度差值与所述强度阈值进行比较，如果比较结果接近0，则可判定所述触控检测信号的近似等于获取到的所述强度阈值。当比较结果超过0，则可判定所述触控检测信号的大于获取到的所述强度阈值。
在一具体应用场景中，如前所述，触控检测信号为电压信号的话，则直接通过电压信号的幅值比较即可实现上述判断过程。
进一步地，本实施例中，上述比较过程可以通过硬件或者软件的方式实现。
S506A、若当前时刻所述触控检测信号的强度大于等于所述强度阈值， 则确定在当前时刻所述触控笔接触到所述触控屏。
本实施例中，与上述实施例类似，所述接触包括首次接触，也包括首次接触之后与触控屏的充分接触。具体地，如果当前时刻所述触控检测信号的强度等于所述强度阈值，则可确定触控笔由远及近首次接触到触控屏。如果当前时刻所述触控检测信号的强度大于所述强度阈值，则可确定触控笔由远及近充分接触到触控屏。
S506B、结束。
图6为本申请实施例中一种触控感应方法的流程示意图；如图6所示，其包括：
S601、判断是否检测到触控笔发送的触控检测信号，若是，则执行步骤S602否则执行步骤S607B；
本实施例中，步骤S601类似上述图5实施例中的步骤S501，即触控笔在使用时靠近或触碰触控屏过程中，触控芯片中的检测模块扫描电极，当触控屏电极距离触控笔的导电笔尖比较远，从电极上检测到触控检测信号强度比较弱，即可认为不在检测模块能有效检测的范围之内，也可以近似检测模块检测不到信号。当导电笔尖接近电极时，检测模块就会在电极上检测到触控检测信号，且其强度逐渐增强。
S602、确定触控笔在触控屏上的触控位置；
本实施例中，结合上述图1所示的确定触控位置的原理，从而确定出触控笔在触控屏上的位置。
S603、判断触控笔的压力检测模块是否产生压力特征数据；如果是，则执行步骤S604B，否则执行步骤S604A；
本实施例中，当触控笔的导电笔尖与触控屏接触时，导电笔尖会受到一定的压力，当压力达到上述压力感应装置的感应范围时，压力感应装置将休眠状态的微控制器唤醒。微控制器通过接收压力感应装置生成的压力特征数据从而确定压力大小，进一步，微控制器控制信号发生模块按照设定的协议将压力特征数据编码到触控检测信号中。当压力感应装置在设定的时段内没有感应到压力时即没有压力特征数据生成，微控制器进入休眠状态以节省功耗。
本实施例中，由于如果压力检测模块产生了压力特征数据，就会编码在触控检测信号中，因此，触控芯片可以对检测模块检测的触控检测信号进行解析，确定其中是否包括压力特征数据，如果压力检测装置产生了压力特征数据， 即可认为触控笔接触到触控屏，否则，则表明压力检测装置未产生压力特征数据，即触控笔没有接触到触控屏。
但是，需要说明的是，压力检测装置是否产生压力特征数据实质上只与触控笔接触到触控屏有关，而与其他原因无关，比如由于压力检测装置出现故障等其他原因导致压力检测装置无法产生压力特征数据的情形；或者，由于检测模块故障无法确定触控检测信号中是否包括压力特征数据。
S604A、判断是否成功获取到预先设置的、针对该触控位置处对应的触控检测信号的强度阈值；如果是，则执行步骤S605A，否则执行步骤S605B；
本实施例中，步骤S604A可以由触控芯片执行，由于可以预先将触控检测信号的强度阈值记录在应用触控芯片的电子设备本地。为了便于后续步骤的处理，触控芯片首先要从电子设备本地去获取触控检测信号的强度阈值，进一步地，根据是否成功获取到的结果，实现后续步骤的执行，最终确定是否响应触控笔当前时刻在触控屏上的触控操作，还是不响应触控笔当前时刻在触控屏上的触控操作。
与前所述，类似上述步骤S503，本实施例中，所述触控屏的触控区域被划分为多个有效触控区域，每个有效触控区域对应一个所述强度阈值，即针对每个有效触控区域配置了一个上述强度阈值。有效触控区域与强度阈值的对应关系可以通过索引表的形式体现。比如，给每个有效触控区域分配一个标识，通过该标识将对应的有效触控区域与强度阈值对应起来。需要说明的是，有效触控区域之间具体可以通过覆盖的驱动电极和感应电极来区分。
一具体应用场景中，具体通过当前时刻触控位置的坐标与划分出有效触控区域的坐标进行比对，从而确首先确定出当前时刻触控位置处于哪一个有效触控区域，再通过查找索引的方式获取对应的触控检测信号的强度阈值。
S604B、判断是否成功获取到预先设置的、针对该触控位置处对应的触控检测信号的强度阈值；如果是，则跳转到步骤S606；否则，执行步骤S607A。
本实施例中，区别于上述步骤S604A的执行，便于下一时刻确定触控笔是否接触到触控屏，实时进行触控检测信号的强度阈值的设定，如果否的话，则通过后续步骤S607A，将通过上述压力特征数据确定出触控笔已经与触控屏接触，为触控笔在触控屏的该触控位置配置一个触控检测信号的强度阈值，以便下一时刻进行触控笔是否接触到该触控位置到的判断，并进一步获取为该触控位置配置的触控检测信号的强度阈值。
S605A、判断是否达到了触控检测信号的强度阈值；如果是，则执行步 骤S606；否则，执行步骤S605B；
本实施例中，步骤S605A类似上述实施例。
S605B、不响应触控笔在触控屏上的操作；
本实施例中，触控芯片不向主机发送触控位置的坐标，或者又称之主机没收到触控芯片发送的触控位置的坐标，进一步不响应触控笔在触控屏上的操作，则表明触控笔没有与触控屏进行有效的接触。
需要说明的是，步骤S605B的执行主要依据于通过上述强度阈值判断出触控笔是否与触控屏之间形成了有效的接触，并不考虑其他原因如触控芯片没有成功发送触控位置的坐标，或者，触控芯片发送了触控位置的坐标，但由于主机故障导致主机没有接收到由触控芯片发送的触控位置的坐标。
S606、响应触控笔在触控屏上的操作；
本实施例中，可以将通过触控芯片计算出触控位置的坐标后，发送主机进行触控操作功能的实现，比如实现触控笔在触控屏幕书写(使触控笔“出水”)等任一手势操作。
当然，在具体实施时，如果实际上出现了触控笔接触到触控屏，但触控芯片没有成功发送触控位置的坐标或者主机没有接收到由触控芯片发送的触控位置的坐标，则可以通过设置定时重发机制来解决触控位置的坐标发送或者接收，直至主机成功接收到由触控芯片发送的触控位置的坐标。这里，在重发机制中可以定义重发的次数阈值，重发的次数超过次数阈值，则可以跳转到步骤S607B，结束当前时刻的处理流程。
S607A、记录检测到的、该触控位置处的触控检测信号的强度值为所述强度阈值，并跳转到步骤S606。
对于下一时刻t2来说，相当于在步骤S601之前，在获取记录的触控检测信号的强度阈值之前，根据当前时刻所述触控笔施加到所述触控屏上的压力特征数据，设置并记录针对下一时刻t2的所述触控检测信号的强度阈值。即将当前时刻t1所述触控笔对所述触控屏进行触控操作过程中触控笔与触控屏之间传输的触控检测信号的强度，设置并记录针对下一时刻t2的所述触控检测信号的强度阈值。
在针对每个有效触控区域配置一个上述强度阈值时，可以选定触控笔与每个有效触控区域中的任一一个位置接触时对应的触控检测信号的信号强度作为通用于该触控区域中的触控检测信号的强度阈值。
需要说明的是，上述在方法的执行过程理解为执行一个周期，当需要重 复执行时，可以根据需要灵活设置步骤之间的跳转关系。
比如如果检测模块检测到的触控检测信号的强度不大于设定的强度阈值，则重复该检测处理过程。为了避免陷入死循环，可以设置重复检测的次数，当达到设定的次数时，还没检测到触控检测信号的强度大于设定的强度阈值，则结束当前流程，不响应触控笔当前时刻在触控屏上的操作。之后，下一个时刻继续执行上述方法实施例的处理过程。
本申请实施例提供一种触控芯片，其包括：检测模块以及处理器，所述检测模块用于检测触控笔当前时刻与触控屏之间传输的触控检测信号以确定所述触控检测信号的强度，所述处理器用于判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏。
本申请实施例还提供一种电子设备，其包括上述触控芯片。
需要说明的是，在其他实施例中，若当前时刻t1获取到压力特征数据，且经过所述若干次判断之后确定出所述触控检测信号的强度仍小于其强度阈值，则更新所述触控检测信号的强度阈值。具体地，经过所述若干次判断之后确定出所述触控检测信号的强度仍小于其强度阈值的话，表明该强度阈值设置过大，则需要设置较小的强度阈值。在具体实施时，可以直接将当前时刻t1检测模块检测到的触控检测信号的强度作为更新后的强度阈值，以在下一时刻t2再次进行触控笔是否接触到触控拍的判断处理。
另外，在其他实施例中，触控芯片可以检测触控笔与触控屏的夹角，为此，在同一触控位置，设置多个所述触控检测信号的强度阈值，所述触控检测信号的强度阈值对应关联与不同所述夹角。
触控笔中的信号发生装置通过编码生成触控检测信号时还可以包括反应触控笔与触控屏的夹角的信息。触控芯片对所述触控检测信号进行解码从而获得不同夹角时不同的所述触控检测信号的强度阈值。进一步在判断当前时刻所述触控检测信号的强度是否大于等于所述触控检测信号的强度阈值时，首先确定出其触控位置处触控笔与触控屏具有当前时刻的夹角时对应的强度阈值，再进行当前时刻所述触控检测信号的强度与所述触控检测信号的强度阈值比较。
另外，需要说明的是，上述实施例中，所述接触可以为实际的物理接触，或者触控笔接近形成实际的物理接触，比如触控笔与触控屏有较小的距离。如果是较小距离的情形，则可以如前所述，在设置强度阈值时其小于触控笔与触控屏形成实际物理接触的触控检测信号的强度。
本申请实施例的电子设备以多种形式存在，包括但不限于:
(1)移动通信设备:这类设备的特点是具备移动通信功能，并且以提供话音、数据通信为主要目标。这类终端包括:智能手机(例如iPhone)、多媒体手机、功能性手机，以及低端手机等。
(2)超移动个人计算机设备:这类设备属于个人计算机的范畴，有计算和处理功能，一般也具备移动上网特性。这类终端包括:PDA、MID和UMPC设备等，例如iPad。
(3)便携式娱乐设备:这类设备可以显示和播放多媒体内容。该类设备包括:音频、视频播放器(例如iPod)，掌上游戏机，电子书，以及智能玩具和便携式车载导航设备。
(4)服务器:提供计算服务的设备，服务器的构成包括处理器、硬盘、内存、***总线等，服务器和通用的计算机架构类似，但是由于需要提供高可靠的服务，因此在处理能力、稳定性、可靠性、安全性、可扩展性、可管理性等方面要求较高。
(5)其他具有数据交互功能的电子装置。
至此，已经对本主题的特定实施例进行了描述。其它实施例在所附权利要求书的范围内。在一些情况下，在权利要求书中记载的动作可以按照不同的顺序来执行并且仍然可以实现期望的结果。另外，在附图中描绘的过程不一定要求示出的特定顺序或者连续顺序，以实现期望的结果。在某些实施方式中，多任务处理和并行处理可以是有利的。
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。
本说明书中的各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (14)

  1. 一种触控感应方法，其特征在于，包括：
    获取记录的触控检测信号的强度阈值，并确定触控笔当前时刻与触控屏之间传输的触控检测信号的强度；
    判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏。
  2. 根据权利要求1所述的方法，其特征在于，所述确定触控笔与触控屏之间传输的触控检测信号的强度，包括：确定触控笔发送给触控屏的触控检测信号的强度。
  3. 根据权利要求1所述的方法，其特征在于，还包括：根据所述触控笔施加到所述触控屏上的压力特征数据，设置并记录所述触控检测信号的强度阈值。
  4. 根据权利要求1所述的方法，其特征在于，还包括：根据当前时刻之前所述触控笔对所述触控屏进行触控操作过程中触控笔与触控屏之间传输的触控检测信号的强度，设置并记录所述触控检测信号的强度阈值。
  5. 根据权利要求1所述的方法，其特征在于，所述触控检测信号的强度阈值对应所述触控笔在靠近所述触控屏的过程中接触到所述触控屏的所述触控检测信号的强度。
  6. 根据权利要求1所述的方法，其特征在于，确定在当前时刻所述触控笔接触到所述触控屏之后，还包括：响应触控操作。
  7. 根据权利要求1所述的方法，其特征在于，所述触控屏的触控区域被划分为多个有效触控区域，每个所述有效触控区域对应一个所述强度阈值；
    对应地，获取为当前时刻为所述触控笔触控的有效触控区域配置的触控检测信号的强度阈值，并确定触控笔当前时刻在所述所要有效触控区域之间传输的触控检测信号的强度。
  8. 根据权利要求7所述的方法，其特征在于，选定触控笔与每个有效触控区域中的任一一个位置接触时对应所述触控检测信号的强度作为通用于该有效触控区域中的触控检测信号的强度阈值。
  9. 根据权利要求1所述的方法，其特征在于，还包括：若未获取到记录的触控检测信号的强度阈值，不响应所述触控操作。
  10. 根据权利要求6或者9所述的方法，其特征在于，所述触控操作包括所述触控笔在所述触控屏上进行的手势操作。
  11. 根据权利要求10所述的方法，其特征在于，还包括：若当前时刻获取到压力特征数据，且经过所述若干次判断之后确定出当前时刻所述触控检测信号的强度仍小于其强度阈值，则更新所述触控检测信号的强度阈值。
  12. 一种触控芯片，其特征在于，包括：检测模块以及微控制器，所述检测模块用于检测触控笔当前时刻与触控屏之间传输的触控检测信号以确定所述触控检测信号的强度，所述微控制器用于判断当前时刻所述触控检测信号的强度是否大于等于获取到的所述强度阈值，若当前时刻所述触控检测信号的强度大于等于所述强度阈值，则确定在当前时刻所述触控笔接触到所述触控屏。
  13. 一种电子设备，其特征在于，包括权利要求12所述的触控芯片。
  14. 一种触控***，其特征在于，包括触控笔以及权利要求13所述的电子设备。
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