Abstract: Disclosed is a method of forming an identification pattern for a touchscreen. The method comprising: (a) defining a touch region by touching a region forming point on a touchscreen; and (b) forming an identification pattern by touching an identification pattern point in the touch region.

Abstract: A position indicator includes a light emitting element, a resonance circuit including a coil which, in operation, transmits and receives a signal to and from a sensor of a position detection apparatus and a capacitor connected in parallel to the coil, and a signal generation circuit which, in operation, accumulates power of the signal received from the sensor by the resonance circuit and generates a light emission driving controlling signal that drives and controls the light emitting element to emit light based on the accumulated power. The light emitting element is driven and controlled by the light emission driving controlling signal generated by the signal generation circuit to perform light emission control of the light emitting element of the position indicator by the position detection apparatus. The position indicator has a simple configuration and performs light emission control of the light emitting element under control of the position detection apparatus.

Abstract: The structure and devices described herein provide an improved attachment for a peripheral device, such as a stylus, to a computing device when not in use. A stylus may have magnets contained therein that cooperate with magnets in a computing device to magnetically secure the stylus to the computing device when not in use. In addition, a retractable interlock may automatically extend from the stylus when the stylus is in proximity of the computing device. The interlock is received in a receptacle of the computing device to provide an improved attachment through the mechanical interaction of the interlock and the receptacle. The interlock is biased in a retracted position and automatically extends through magnetic attraction with the computing device.

Abstract: One embodiment provides a method. The method includes receiving, with a computing system, stylus orientation data representing an orientation of a stylus. The method includes receiving, with a computing system, grip characteristics data representing a grip on the stylus by a user. The method includes identifying, with the computing system, a stylus mode for use by the computing system, at least partially based on the stylus orientation data and the grip characteristics data. The method includes applying the stylus mode to the computing system to interpret interaction data representing interactions of the stylus with the computing system.

Abstract: An input method and electronic device using a pen input device are provided. In an embodiment, status information of the pen input device is received, and contact information of a contact point between the pen input device and the terminal is generated, based on the received status information. Expressive effects of a pen input, such as line thickness, density and texture, are varied based on the contact information. Such input method and electronic device using the pen input device can simply and conveniently vary expressive effects of a pen-based input. In other embodiments, contact information is determined from actual contact points and expressive effects are varied as a function of the contact information or pen status information derived from the actual contact information.

Abstract: An input device and method for control based on input device tilt is provided. The input device includes a conductive tip formed at one end of the input device, a resonant circuit unit configured to generate a response signal corresponding to a signal entering through the conductive tip and output the response signal through the conductive tip, and a connection part formed between the conductive tip and a body of the input device to enclose a periphery of the conductive tip so as to have a part of the conductive tip exposed from one end of the input device. The connection part includes a metal member having a larger cross-section area than a cross-section area of the conductive tip and which affects signal intensity in response to input device tilt as detected by a touch screen of an electronic device.

Abstract: A display processing method and a display processing device are described. The method includes receiving a first gesture operation on a touch display region of an electronic device, when a first application interface of a first application installed in the electronic device is displayed in the touch display region; determining whether the first gesture operation satisfies a first predetermined condition or not; generating a first sub interface to be displayed in a first sub region of the touch display region and a second sub interface to be displayed in a second sub region of the touch display region when it is determined that the first gesture operation satisfies the first predetermined condition; and displaying the first sub interface in the first sub region, and displaying the second sub interface in the second sub region.

Abstract: A system and method for transmitting an input value to a computing device are included herein. The method includes detecting sensor data in a stylus. The method also includes detecting a gesture event with the stylus. In addition, the method includes generating an input value based on the sensor data and the gesture event. Furthermore, the method includes sending the input value from the stylus to a computing device.

Abstract: Stroke operation prediction techniques and systems for three-dimensional digital content are described. In one example, stroke operation data is received that describes a stroke operation input via a user interface as part of the three-dimensional digital content. A cycle is generated that defines a closed path within the three-dimensional digital content based on the input stroke operation and at least one other stroke operation in the user interface. A surface is constructed based on the generated cycle. A predicted stroke operation is generated based at least in part on the constructed surface. The predicted stroke operation is then output in real time in the user interface as part of the three-dimensional digital content as the stroke operation data is received.

Abstract: Touch-based input devices, such as a stylus, can receive tactile input from a user. The tactile input functions can be performed by a touch sensor, such as a capacitive sensing device. A touch sensor can be integrated into a stylus in a low profile form. Wireless charging and magnetic coupling with a host device are also facilitated. The stylus can be provided with the above features in a small form factor that improves a user experience with the stylus.

Abstract: A computer peripheral includes a stylus having a capacitive stylus nib and an earpiece dock. An earpiece is removably dockable at the earpiece dock. The earpiece includes a speaker, an earpiece battery, and a wireless radio configured to communicatively couple with a host device. The computer peripheral further includes a charger configured to receive power, and while the earpiece is docked, to use the power to charge the earpiece battery.

Abstract: A display may include a viewing area and a border about the viewing area. The border is visibly opaque and near infrared transparent. An encoded pattern underlies the border.

Abstract: A method to identify positions of fingers of a hand is described. The method includes capturing images of a first hand using a plurality of cameras that are part of a wearable device. The wearable device is attached to a wrist of a second hand and the plurality of cameras of the wearable device is disposed around the wearable device. The method includes repeating capturing of additional images of the first hand, the images and the additional images captured to produce a stream of captured image data during a session of presenting the virtual environment in a head mounted display (HMD). The method includes sending the stream of captured image data to a computing device that is interfaced with the HMD. The computing device is configured to process the captured image data to identify changes in positions of the fingers of the first hand.

Abstract: Disclosed are a method and corresponding touch sensitive device that detects touch and provides tactile feedback. In an embodiment, the device includes a touch interface having row conductors and column conductors. A first row signal generator transmits a first row signal on a first row conductor. A second row signal generator transmits a second row signal on a second row conductor, the second row signal being orthogonal to the first row signal. A third row signal generator generates an electrotactile discharge signal on at least one of the row conductors. In an embodiment, the electrotactile discharge signal is time multiplexed with at least one of said first row signal or said second row signal. A touch processor identifies a touch event on the touch interface by processing signals present on at least one of the column conductors.

Abstract: An electronic device, with a touch-sensitive surface and display, displays a user interface at a first display rate. While displaying the user interface, the device detects movement of a touch input across the touch-sensitive surface at a first detection rate that is higher than the first display rate. An application-independent touch processing module sends to an application-specific portion of the first software application touch location information for the touch input that identifies: one or more predicted locations of the touch input on the touch-sensitive surface, and one or more predicted intensity values of the touch input at one or more intensity locations of the touch input on the touch-sensitive surface. The first software application processes the touch location information and updated the user interface accordingly.

Abstract: Methods for providing information related to selected content and a suggested completion of one or more written words are provided. In one aspect, a method includes invoking an assistant tool, displaying an assistant window on a device display, receiving an indication of a selection of content on the display, generating a query for information associated with the selected content, receiving ranked results from the query, and displaying the received results in the assistant window. In one aspect, a snapshot of the selected content is captured and displayed with the results. In one aspect, a method includes receiving an indication of one or more words being written on the display and providing at least one suggested completion of a word or sentence being written. Systems and machine-readable media are also provided.

Abstract: The present disclosure provides a touch driving circuit, a touch display device, and a pen data recognition method by a touch circuit, and the touch circuit supplies a touch driving signal to two or more touch electrodes from among the plurality of touch electrodes in a pen data mode, generates sensing data for recognizing pen data which is transmitted from an active pen via the two or more touch electrodes in response to the touch driving signal, and performs range conversion and merger of two or more pieces of sensing data generated by detecting the pen data of same bit value, so as to generate summation sensing data.

Abstract: A portable electronic device includes a stylus including a pen-shaped casing structure, a support structure, a rear circuit board, a function assembly, a pen head structure and a power supply. The support structure is disposed in the casing structure. The rear circuit board is positioned on the support structure. The function assembly is disposed on the support structure. The head structure is partially disposed out of the casing structure. The power supply is electrically connected to the rear circuit board. The function assembly includes first, second and third conductive members, first and second movable members, and a button body. When the button body is pressed to drive the first and second movable members to move simultaneously, the first movable member simultaneously electrically contacts the first and second conductive members, so the first and the second conductive members are electrically connected with each other through the first movable member.

Abstract: Active styli, methods and non-transitory computer readable storage media can be used for mitigating noise coupling from an active stylus to a touch sensing system. An active stylus can include a force sensor that can be used to detect stylus touch-down and lift-off events. Based on a touch-down and lift-off events, the stylus can generate stimulation signals and ramp up or ramp down the amplitude of the stimulation signals. Additionally or alternatively, an active stylus can receive information to synchronize the active stylus with a touch-sensitive device. Based on the information, the stylus can synchronize generation of stimulation signals with the stylus scan performed by the touch-sensitive device. The stimulation signals can be ramped up during a guard band period before a stylus scan and can be ramped down during a guard band period after the stylus scan.

Abstract: A stylus including a pen rod, a first pen barrel, a second pen barrel, a driving element, and an actuating element is provided. The first pen barrel has a first end portion, a second end portion, and a first engagement slot located at the second end portion. The first end portion is fixed to the pen rod. The second pen barrel is sleeved on the second end portion. The driving element is disposed in the first pen barrel and includes an engagement portion. The engagement portion is engaged with the first engagement slot. The actuating element passes through the second pen barrel and the first pen barrel and is coupled to the driving element. The actuating element is configured to move toward a first direction after receiving a force to cause the driving element to be elastically deformed to separate the engagement portion from the first engagement slot.

Abstract: An electronic device is provided. The electronic device includes a first antenna part configured to exchange a first wireless signal with a coordinate sensing sensor of a second electronic device by electromagnetic induction, and a second antenna part configured to exchange a second wireless signal with a data communication antenna of the second electronic device by electromagnetic induction.

Abstract: The present disclosure provides a portable electronic device and an active capacitive stylus thereof. The active capacitive stylus includes a pen-shaped casing structure, a support structure, a circuit substrate, a sensor module, an elastic assembly, an abutting assembly, a pen head structure and a power supply component. The circuit substrate is positioned on the support structure. The sensor module is electrically connected to the circuit substrate. The elastic assembly includes a flexible holder contacting the sensor module and a flexible element disposed between the flexible holder and the sensor module. The abutting assembly is disposed inside the pen-shaped casing structure to abut against the flexible holder. The pen head structure, the abutting assembly, the elastic assembly and the sensor module are abutted one to another, so that there is no gap between two of the pen head structure, the abutting assembly, the elastic assembly and the sensor module.

Abstract: An adaptor allows a user to turn any pencil or pen into a capacitive stylus while still allowing it to write on paper. When attached to a pencil, pen or similarly shaped and purposed tool, it gives the tool the added capability of operating electronic devices having a capacitive touch screen. It does this while constantly maintaining the writing instrument's intrinsic capability of marking paper. The main component of the invention comprises a fastener which allows electricity to pass along it while simultaneously allowing the writing utensil tip to be permanently exposed. It can transfer electricity from the user's hand to the touch screen without interfering with the original function or ergonomic shape of the writing instrument. A seamless workflow between surfaces is created since the same end of the writing instrument is used and no other action is required to reveal or conceal its tip.

Abstract: A touch-sensitive display device includes a touch sensor having a plurality of display electrodes and control logic coupled to the plurality of display electrodes. The control logic is configured to receive, for each of a plurality of stylus electrodes of an active stylus interacting with the touch-sensitive display device, a spatial capacitance measurement over the touch sensor for that stylus electrode. Relative to the touch sensor, and based on spatial capacitance measurements of the stylus electrodes, the control logic is configured to determine (i) a tip position of the active stylus, (ii) a tilt parameter of the active stylus, and (iii) a twist parameter of the active stylus.

Abstract: Methods and apparatuses are provided for determining a pitch and yaw of an elongated interface object relative to a proximity sensitive surface. In one aspect, a proximity image is received having proximity image data from which it can be determined which areas of the proximity sensitive surface sensed the elongated interface object during a period of time. A proximity blob is identified in the proximity image and the proximity image is transformed using a plurality of different transformations to obtain a plurality of differently transformed proximity images. A plurality of features is determined for the identified blob in the transformed proximity images and the pitch of the elongated interface object relative to the proximity sensitive surface is determined based upon the determined features and a multi-dimensional heuristic regression model of the proximity sensitive surface; and a yaw is determined based upon the pitch.

Abstract: A pressure detection apparatus includes: a drive power supply, a differential circuit, a pressure calculation unit, and at least one pressure sensor. Each pressure sensor includes a first electrode plate, a second electrode plate, a third electrode plate, a first elastic dielectric layer, and a second elastic dielectric layer. One detection capacitor is formed between the first electrode plate and the second electrode plate, and one detection capacitor is formed between the first electrode plate and the third electrode plate. The pressure sensor is connected between the drive power supply and an input terminal of the differential circuit, and an output terminal of the differential circuit is connected to the pressure calculation unit.

Abstract: A touch screen device capable of executing an event based on a gesture combination according to an exemplary embodiment of the present invention, and an operating method thereof maintain a command database storing a plurality of predetermined gesture combinations, in which two or more gestures are sequentially combined, and commands corresponding to the plurality of predetermined gesture combinations, and confirm a gesture combination according to two or more touch inputs when a user inputs the two or more touch inputs onto a touch screen with an interval within a predetermined time, extract a command corresponding to the gesture combination from the command database, and execute an event corresponding to the extracted command.

Abstract: Enhanced 3D enabled transparent display screen for electronic mobile device and method of operation. The display may include a dual display screen varying in translucency. The dual display screen may be a type of transparent organic light emitting display or type of LCD, LED. For gaming and photo applications, the invention response to different level of pressure on touch screen to access different layers of objects in parallax image or bottom layer of transparent display screen. Advertisements delivered on the electronic mobile devices by a mobile app are displayed on the electronic device screen outside the confines or borders of the mobile app. Advertisements are viewed on a rear display screen to non-users of the electronic mobile device. The dual screen may be touch screen with proximity detection and allow for multi-player gaming.

Abstract: In one example, an input pen to control an operation of a display is described, which may include a sensor to detect an input pen gesture, a communication interface to establish a connection with the display, and a controller to transmit a control signal corresponding to the detected input pen gesture to the display via the communication interface. The control signal may be used to retrieve a gesture command to manipulate data on the display.

Abstract: The present disclosure relates to a terminal, a method, an apparatus and an electronic device for determining a mode of operation. In some aspects, the terminal includes: an ultrasonic wave emitter, an ultrasonic wave signal path and a microphone. The ultrasonic wave emitter is arranged inside the terminal, a first hole is arranged on a side-frame of the terminal for accommodating the microphone, an ultrasonic wave signal emitted by the ultrasonic wave emitter propagates from inside of the terminal to a surface of the terminal via the ultrasonic wave signal path, the microphone is configured to receive an ultrasonic echo signal of the ultrasonic wave signal, and to determine whether the terminal is touched according to the ultrasonic echo signal.

Abstract: A synchronous displaying method and a synchronous displaying apparatus are provided. An ability to transmit at any time is possessed by intercepting screen content at regular time and performing compression, which improves transmission effects and shortens transmission time. A comparison of the intercepted screen content and intelligent determining on the synchronous image is performed by using eigenvalues parsed and obtained during image compression. In addition, synchronous transmission is realized automatically without manual operations. Moreover, the transmission of repeated screen content is avoided to the greatest extent, which reduces storage pressure on student user terminals and ensures content comprehensiveness. Further, marking and judging on the screen image content improve the efficiency of student reviews. For example, students can directly see the last few pages of each blackboard-writing during reviews.

Abstract: Methods and systems for selecting and displaying items includes causing the display of a large image of a selected item, a plurality of view icons indicative of different views of the selected item, and item details associated with a selected item. After the customer selects a view and/or color for the large image and mouses over the image, a zoom box appears and a corresponding magnified image window appears with a magnified image of the zoom box image for the selected view and color of the item.

Abstract: A method for identifying an error in a tip status indication from a stylus includes detecting input from a stylus with a digitizer sensor via an electrostatic (ES) wireless communication channel established between said stylus and said digitizer sensor. An indication of a tip status is received from the stylus, indicating whether the tip status is in hover or touch. The tip status is verified based on input detected with the digitizer sensor. When an error is identified in the tip status indication, a notification of the error is sent.

Abstract: An active stylus signal identification method applied to a capacitive touch panel is disclosed. When an active stylus and a finger approach the capacitive touch panel at the same time, the active stylus signal identification method includes steps of: (a) during a first period, the active stylus emits an active stylus signal toward the capacitive touch panel according to a protocol; (b) during a second period after the first period, the active stylus stops emitting the active stylus signal and a touch sensing circuit performs a finger touch sensing on the capacitive touch panel; (c) during a third period after the second period, the active stylus emits the active stylus signal toward the capacitive touch panel again according to the protocol.

Abstract: An active stylus includes a signal processing section. The signal processing section during operation in a first mode, while supplying a downlink signal DS1, obtained by modulating a pulse train signal with a pen pressure level P, to an electrode, determines whether it is necessary to switch to a second mode. The signal processing section during operation in the second mode, while supplying a downlink signal DS2, obtained by modulating a sine wave signal with the pen pressure level P, to the electrode, determines whether it is necessary to switch to the first mode. The signal processing section switches to operation in the second mode when determining that such is necessary, and switches to operation in the first mode when determining that such is necessary. The active stylus may be used with two position detection devices, one supporting only the first method and the other supporting only the second method.

Abstract: Certain exemplary embodiments can provide a method, which comprises causing an image or video to be transmitted to a database. The image or video is transmitted from a body camera worn by a user. The image or video is linked to detected writing of the user. The writing is detected via a device worn on a hand of the user. The device is worn on the hand of the user and is not comprised by the body camera.

Abstract: Aspects herein describe a display system that moves at least a portion of a displayed GUI in response to turbulent motions in a vehicle. In one aspect, the GUI is displayed on a screen that includes an integrated touch sensing region that permits a user to interact with one or more elements in the GUI. However, turbulent motion may cause the user to miss the interactive element or inadvertently touch the wrong element in the GUI. To aid the user to touch the desired portion of the GUI, in one aspect, the display system tracks the movement of a hand or finger of the user to determine its position relative to a screen displaying the GUI and maintains the spatial relationship of the hand or the finger to the GUI during turbulent motions.

Abstract: The present disclosure provides an active pen, an active pen touch system and a method for performing touch using an active pen. The active pen comprises an active pen main body comprising a pen tip and a pen body, wherein the pen tip is configured to receive a signal from a touch screen; a judgment circuit electrically connected to the pen tip, and configured to judge whether the signal is a synchronization control signal or an electrostatic signal; and an electrostatic discharge switch circuit electrically connected between the judgment circuit and the pen body, and configured to be turned on on condition that the signal is an electrostatic signal, so as to electrically connect the judgment circuit to the pen body.

Abstract: Provided is technology that makes it easy to select a format for inputting drawings or characters when inputting to a display apparatus such as a tablet or the like using a touch pen. A display-input system includes a tablet, and a touch pen as an input unit for the tablet. The tablet and touch pen are capable of linked operation by communicating with each other. Contents (input-format-selection screen) that are the same as a palette of the tablet are displayed on a pen-side touch panel of the touch pen so that selection is possible. A format that is selected by a user operating the pen-side touch panel is reflected on an application that is being executed by the tablet, and reflected on the application in the same way as direct operation on the tablet.

Abstract: A pen pressure detection device includes: a pressure sensor including electrodes that output electrical information corresponding to an applied pressure; and a holder configured to electrically connect the pressure sensor to a circuit board having a circuit that detects the applied pressure based on the electrical information output from the pressure sensor. The holder includes a first portion that retains the pressure sensor and a second portion that engages with the circuit board, and the holder has a surface on which wiring is formed, the wiring extending from the first portion to the second portion, and the electrodes of the pressure sensor being electrically connected to the circuit board via the wiring when the holder and the circuit board are engaged with each other. The pen pressure detection device can be easily assembled and maintain a connection to the circuit board when the applied pressure is high.

Abstract: An email client having multiple screens that may be displayed in different corresponding ones of a plurality of different display portions of a handheld electronic device. The screens of the email client may be related by way of a dependency relationship and/or may provide for control between the various screens. In one embodiment, the email client includes a folder management screen, a message listing screen, a message detail screen, and an attachment screen. Additionally, the email client may be responsive to received gesture inputs to navigate with respect to the screens and/or perform actions with respect to one or more elements (e.g., messages) of the various screens.

Abstract: Examples of the disclosure enable managing a user account, such that a peripheral device is configured to interact with one or more user devices associated with the user account. In some examples, a device identity associated with the peripheral device is identified, and it is determined whether the device identity is associated with a user account. Upon determining that the device identity is associated with the user account, the peripheral device is paired with a user device associated with the user account without manually pairing the peripheral device with the user device. Examples of the disclosure enable the peripheral device to interact with one or more user devices in an efficient, user-friendly manner.

Abstract: Handwriting verification methods and related computer systems, and handwriting-based user authentication methods and related computer systems are disclosed. A handwriting verification method comprises obtaining a handwriting test sample containing a plurality of available parameters, extracting geometric parameters, deriving geometric features comprising an x-position value and a y-position value for each of a plurality of feature points in the test sample, performing feature matching between geometric features of the test sample and a reference sample, determining a handwriting verification result based at least in part on the feature matching, and outputting the handwriting verification result. Techniques and tools for generating and preserving electronic handwriting data also are disclosed. Raw handwriting data is converted to a streamed format that preserves the original content of the raw handwriting data.

Abstract: Paintbrush and liquid simulation techniques are described. In one or more implementations, input is received to perform brush strokes with a virtual paintbrush on a virtual canvas. For virtual paint on the virtual canvas, lifelike paint qualities are simulated. However, the lifelike paint qualities are simulated solely for the virtual paint that is within a region of the canvas. The lifelike paint qualities are not simulated for virtual paint located outside the region. As part of simulating the interaction between the virtual paint, the virtual paintbrush, and the virtual canvas, various parts of the simulation may be performed by different processing units. For example, bristles of the virtual paintbrush may be simulated utilizing a first processing device such as a central processing unit (CPU). A second processing unit, such as a graphics processing unit (GPU), may be employed to simulate the lifelike effects of the virtual paint.

Abstract: To provide a display device with a touch detection function capable of suppressing an increase in price. The display device is provided with a pixel array which includes a plurality of pixels; a plurality of signal lines which supply an image signal to the plurality of pixels; a plurality of drive electrodes which supply a drive signal to the plurality of pixels; and an electrode driving circuit which supplies a magnetic field drive signal to the drive electrode at a time of detecting an external proximity object using the magnetic field, and supplies an electric field drive signal to the drive electrode at a time of detecting the external proximity object using the electric field.

Abstract: An electronic device can include a housing including a first surface, a second surface, and a third surface, the first and second surface defining an electronic component mounting space and the second and third surface defining a pen mounting space adapted to receive an electronic pen; and a display and an ElectroMagnetic Resonance (EMR) sensor pad disposed in the electronic component mounting space. When the electronic pen is mounted in the pen mounting space, the EMR sensor pad may detect a resonance frequency of a coil body of the electronic pen.

Abstract: A display system includes a pointing device and a display device. The pointing device includes: a magnetic member; a contact detector configured to detect contact with a user; a motion detector configured to detect a motion of the pointing device; and a transmitter configured to transmit state information to the display device in response to a state determining unit determining that contact detection information indicating detection of the contact is acquired from the contact detector and a value indicating the motion is less than a reference value. The display device includes: an electromagnet; a status determining unit configured to determine an energization status of the electromagnet; a receiver configured to receive the state information; and an electromagnet controller configured to control energization to the electromagnet in accordance with the energization status of the electromagnet when the state information is received.

Abstract: An electronic system comprising an electronic device and an indicating device is provided. The indicating device includes a wireless communication circuit configured to be communicated with the electronic device, a switch circuit, a motion sensor for detecting a movement of the indicating device, and a control unit coupled to the wireless communication circuit, the motion sensor and the switch circuit. In a period that the switch circuit is triggered, the motion sensor detects a plurality of three-dimensional rotation matrices of the indicating device in the space. A movement trace of the indicating device is computed by the electronic device according to the three-dimensional rotation matrices, and a corresponding operating function is enabled according to the movement trace. An operating method and an indicating device is further provided.

Abstract: An electronic pen has a tubular housing which has an opening provided at one end in an axial direction of the housing and is closed at another end thereof, and has at least one electronic pen main body accommodated in the tubular housing. The electronic pen main body includes a core body having an end in the axial direction of the housing that serves as a pen tip, and a magnetic core provided at an end of core body that is opposite to the end of the core body that serves as the pen tip and having a coil wound thereon. In operation, the end of the core body that serves as the pen tip projects from the opening of the housing to outside of the housing, and part of the magnetic core projects from the opening of the housing to outside of the housing.

Abstract: A control method of a touch system is provided. The touch system includes a touch device and an active pen, the touch device comprises a touch display panel, a timing control circuit, and a touch detection circuit electrically connecting to the timing control circuit. The control method comprises steps of: outputting a beacon signal with a frequency from the active pen; detecting the beacon signal by the touch detection circuit; adjusting a refresh frequency of the touch display panel to be equal to a frequency of the beacon signal when the refresh frequency of the touch display panel is different from the frequency of the beacon signal; and transmitting a start trigger signal of a frame of the adjusted refresh frequency by the timing control circuit after a delay time.