WO2021221222A1 - Touch drive device and touch drive system - Google Patents

Abstract

The present invention relates to a touch drive device and a touch drive system. A touch drive device according to one embodiment of the present invention comprises: a touch panel including a plurality of touch electrodes; a sensor circuit which applies a first drive signal and/or a second drive signal to the touch panel, and receives a sensing signal induced by the first drive signal and/or the second drive signal; and a control unit which detects a touch input from the sensing signal received by the sensor circuit. The control unit controls to apply the first drive signal to the touch panel when a pen input is not detected after the touch drive device boots, and applies the first drive signal and the second drive signal to the touch panel when a pen input is detected at least once after the touch drive device boots. The first drive signal is a signal for detecting an input by an external object, and the second drive signal is a signal for detecting a pen input. Accordingly, the power consumption of the device can be minimized when a pen is not used.

Description

Touch-driven devices and touch-driven systems

The present invention relates to a touch driving device and a touch driving system, and more particularly, to a touch driving device and a touch driving system capable of minimizing power consumption by differently setting a driving signal applied in a standby state depending on whether an electronic pen is initially recognized. It's about the system.

A touch panel is an input device that is installed in a display device and allows a user to input information by directly touching a screen using a finger or a pen.

As a method of sensing a touch, there are a decompression method for sensing pressure and an electrostatic method for sensing a change in capacitance. The electrostatic method is a method of determining whether a touch exists and determining touch coordinates by detecting a change in capacitance that occurs when a conductive material or a part of the body comes into contact with the touch panel.

The pen to which the capacitive method is applied may be used as a touch input means in a touch panel using the capacitive method. A touch recognition method using a capacitive pen includes a passive pen method that detects a position of the pen by recognizing only a change in capacitance, and an active pen method that detects the pen by transmitting and receiving a signal to and from a touch panel.

The signal used in the active pen method may include information on the touch panel and information on the active pen, and the display device including the touch panel may provide more functions to the user by using this information.

In this case, the touch panel determines the touch input by distinguishing between an electrostatic input by a pen and an electrostatic input by a conductive material such as a finger. To this end, both a driving signal for sensing a pen and a driving signal for sensing an object other than the pen should always be applied to the touch panel in the touch input standby state or the touch input sensing state.

However, when the pen is not used on the touch panel, unnecessary power consumption occurs due to the input of a driving signal for pen sensing, and a battery usage time is shortened in the mobile electronic device.

In order to solve the above problems, it is an object of the present invention to provide a touch driving device and a touch driving system capable of minimizing power consumption by differently setting a driving signal applied in a standby state depending on whether an electronic pen is initially recognized. .

In order to solve the above problems, the present invention provides a touch driving device capable of increasing the use time of the device in an environment in which the electronic pen is not used by not applying a driving signal for pen recognition when the electronic pen is not recognized, and An object of the present invention is to provide a touch drive system.

In order to solve the above problems, an object of the present invention is to provide a touch driving device and a touch driving system capable of increasing the accuracy of touch sensing by setting different periods for applying a driving signal in a touch standby state and a touch input state. have.

In order to solve the above problems, the present invention provides a touch driving device and a touch driving device capable of minimizing power consumption and increasing touch sensing accuracy by differently setting a driving signal applied in a touch input state according to a type of an input touch. The purpose is to provide a system.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

In order to achieve the above object, a touch driving apparatus according to an embodiment of the present invention provides a touch panel including a plurality of touch electrodes, applying a first driving signal and/or a second driving signal to the touch panel, and performing the first driving a sensor circuit for receiving a sensing signal induced by the signal and/or the second driving signal; and a control unit for detecting a touch input from the sensing signal received by the sensor circuit, wherein the control unit includes a pen input after the touch driving device boots. If this is never detected, control to apply the first driving signal to the touch panel, and after the touch driving device boots up and after the pen input is detected at least once, the first driving signal and the second driving signal are applied to the touch panel, , the first driving signal may be a signal for detecting an input by an external object, and the second driving signal may be a signal for detecting a pen input.

Meanwhile, in the touch driving apparatus according to an embodiment of the present invention for achieving the above object, when the controller detects a touch input from a sensing signal corresponding to the first driving signal, an uplink signal for detecting the electronic pen is applied to the touch panel, and when a downlink signal is received, it is determined that the touch input is a pen input, and when the pen input is detected, the first driving signal and the second driving signal can be applied to the touch panel. have.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, when detecting a touch input from a sensing signal corresponding to the first driving signal, the control unit touches an uplink signal for detecting the electronic pen. If applied to the panel and a downlink signal is not received, it is determined that the touch input is not a pen input. If the pen input is not detected after the touch driving device boots, the first driving signal may be applied to the touch panel. .

Meanwhile, in the touch driving apparatus according to an embodiment of the present invention for achieving the above object, the touch input may be an input by an external object or a pen input.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, the controller applies the first driving signal periodically, and applies the first driving signal when an input by an external object is not detected. The period may be longer than the period of applying the first driving signal when an input by an external object is detected.

On the other hand, in the touch driving apparatus according to an embodiment of the present invention for achieving the above object, the control unit periodically applies the second driving signal, and when the pen input is not detected, the period of applying the second driving signal is: When the pen input is detected, it may be longer than the period of applying the second driving signal.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, the controller periodically applies the first driving signal and/or the second driving signal, and when a pen input is detected, the second driving signal A period of applying ? may be shorter than a period of applying the first driving signal when an external object input is detected.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, the controller periodically applies the first driving signal and/or the second driving signal, and when a pen input is detected, the first driving signal A period of applying ? may be longer than a period of applying the first driving signal when a touch input is not detected.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, the controller periodically applies the first driving signal and/or the second driving signal, and when an input by an external object is detected, the A period of applying the second driving signal may be longer than a period of applying the second driving signal when a touch input is not detected.

Meanwhile, in the touch driving apparatus according to an embodiment of the present invention for achieving the above object, the first driving signal may include a first sensing signal including a plurality of pulses for detecting a touch from an external object.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, the second driving signal is a second sensing consisting of a plurality of pulses for detecting an uplink signal and a downlink signal received from the electronic pen. It may contain signals.

Meanwhile, in the touch driving apparatus according to an embodiment of the present invention for achieving the above object, the magnitude of the uplink signal included in the second driving signal may be greater than the magnitude of the second sensing signal.

Meanwhile, in the touch driving device according to an embodiment of the present invention for achieving the above object, the uplink signal includes at least one of pilot data, tip selection data, and ring selection data, and the downlink signal includes pen identification information, It may include at least one of pen pressure, battery status, tip data, and ring data.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, when a downlink signal is received, the controller compares the sync of the received downlink signal with the second sensing signal, and It can be determined whether the pen is bidirectional or unidirectional according to whether or not the pen is aligned.

Meanwhile, in the touch driving device according to an embodiment of the present invention for achieving the above object, the controller may determine whether the pen is bidirectional or unidirectional based on the content of data included in the downlink signal.

On the other hand, in the touch driving apparatus according to an embodiment of the present invention for achieving the above object, the control unit, the first period of applying the second driving signal when the sync coincides with the first cycle when the sync does not coincide 2 It may be set to be shorter than the second period of applying the driving signal.

On the other hand, in the touch driving device according to an embodiment of the present invention for achieving the above object, the controller detects a touch input from a sensing signal corresponding to the first driving signal and/or the second driving signal, and on the touch panel. Touch input coordinates can be calculated.

Meanwhile, in the touch driving device according to an embodiment of the present invention for achieving the above object, the touch panel may be a capacitive touch panel, and the pen may be an active electrostatic (AES) pen.

Meanwhile, a touch driving system according to an embodiment of the present invention for achieving the above object may include a touch driving device and at least one electronic pen transmitting a downlink signal to the touch driving device.

On the other hand, in the touch driving system according to an embodiment of the present invention for achieving the above object, the electronic pen transmits the pen tip contacting or close to the touch panel of the touch driving device and the second driving signal applied to the touch panel to the pen. It may include a receiver for receiving through the tip and a transmitter for transmitting a downlink signal including pen information based on the received second driving signal.

The details of other embodiments are included in the detailed description and drawings.

According to the present invention, there are the following effects.

The touch driving apparatus and the touch driving system according to an embodiment of the present invention have the effect of minimizing power consumption by differently setting the driving signal applied in the standby state depending on whether the electronic pen is initially recognized.

In addition, the touch driving apparatus and the touch driving system according to an embodiment of the present invention reduce the use time of the device in an environment in which the electronic pen is not used by not applying a driving signal for pen recognition when the electronic pen is not recognized. has the effect of increasing it.

In addition, the touch driving apparatus and the touch driving system according to an embodiment of the present invention have the effect of increasing the accuracy of touch sensing by setting different periods of applying the driving signal in the touch standby state and the touch input state.

In addition, the touch driving apparatus and the touch driving system according to an embodiment of the present invention set different driving signals applied in a touch input state according to the type of the input touch, thereby minimizing power consumption and increasing the accuracy of touch sensing. can have an effect.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the description of the claims.

1 is a diagram illustrating a touch driving system according to an embodiment of the present invention.

2 and 3 show a mobile terminal including a touch driving device according to an embodiment of the present invention.

4 is a diagram illustrating a touch driving device according to an embodiment of the present invention.

FIG. 5 shows the structure of the electronic pen of the touch driving system of FIG. 1 .

FIG. 6 illustrates transmission and reception of uplink and downlink signals between the touch driving device and the electronic pen of FIG. 4 .

FIG. 7 illustrates a driving signal applied to the touch panel of the touch driving device of FIG. 6 .

8 to 11 show driving signals of a standby section, a pen detection section, a sensing section, and a standby section in a state before the first pen detection.

12 to 15 illustrate driving signals of a waiting section, a pen detection section, a sensing section, and a waiting section in a state after the pen is detected.

16 to 17 are diagrams illustrating that the first driving signal and the second driving signal are time-divided and input in the waiting section and the sensing section.

18 is a diagram illustrating a comparison table of current consumed in the touch driving device of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Regardless of the reference numerals, the same or similar components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

The electronic device described in this specification is mainly described by taking a mobile terminal as an example for convenience, but is not necessarily limited thereto. Here, the electronic device may include a vehicle video device such as a black box, a closed caption TV (CCTV), a mobile terminal, a robot cleaner, and the like. The mobile terminal may include a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, personal digital assistants (PDA), a navigation device, a tablet PC, a wearable device, and the like.

1 is a diagram illustrating a touch driving system 10 according to an embodiment of the present invention.

The touch driving system 10 according to an embodiment of the present invention may include a touch driving device 200 and at least one electronic pen 300 .

The touch driving apparatus 200 may sense a touch by a body part (eg, a finger) and may sense a touch by the electronic pen 300 .

For example, the touch driving device 200 may sense a touch from a pen to which an electrostatic method is applied, and transmit a signal to a passive pen or a touch panel that detects the position of the pen by recognizing only a change in capacitance. A touch may be sensed from an active pen that transmits/receives.

A touch by a passive pen is processed in the same way as a touch by a finger. Accordingly, in this specification, a touch by a finger includes a touch by a passive pen.

In the present specification, an input by an active pen is referred to as a pen input, and any touch by a passive pen or a finger other than the active pen is referred to as an input by an external object.

The touch driving device 200 may sense a touch by the active pen 300 in association with the active pen 300 .

The touch driving device 200 applies different driving signals to the touch panel for a case in which a pen input is not detected after the touch driving device 200 boots and a case in which a pen input is detected at least once, The driving device 200 may operate to reduce power consumed.

FIG. 2 is a diagram illustrating an exterior of a mobile terminal 100 including a touch driving device 200 according to an embodiment of the present invention. (a) is a front view of the mobile terminal 100, (b) is a side view, (c) is a rear view, (d) is a bottom view.

Referring to FIG. 2 , the case constituting the exterior of the mobile terminal 100 is formed by a front case 100 - 1 and a rear case 100 - 2 . Various electronic components may be embedded in the space formed by the front case 100-1 and the rear case 100-2.

Specifically, the display 180, the first camera device 195a, the first sound output module 153a, and the like may be disposed on the front case 100-1. In addition, first to second user input units 130a and 130b may be disposed on a side surface of the rear case 100 - 2 .

The display 180 may operate as a touch screen by overlapping touch pads in a layered structure. The display 180 may include the touch driving device 200 according to an embodiment of the present invention, and the touch driving device 200 may be positioned on the upper surface of the display 180 to detect a touch input.

The first sound output module 153a may be implemented in the form of a receiver or a speaker. The first camera device 195a may be implemented in a form suitable for capturing an image or a moving picture of a user or the like. In addition, the microphone 123 may be implemented in a form suitable for receiving a user's voice, other sounds, and the like.

The first to second user input units 130a and 130b and the third user input unit 130c to be described later may be collectively referred to as a user input unit 130 .

The first microphone (not shown) may be disposed on the upper side of the rear case 100-2, that is, on the upper side of the mobile terminal 100, for audio signal collection, the lower side of the rear case 100-2, That is, the second microphone 123 may be disposed under the mobile terminal 100 to collect audio signals.

A second camera device 195b , a third camera device 195c , a flash 196 , and a third user input unit 130c may be disposed on the rear side of the rear case 100 - 2 .

The second and third camera devices 195b and 195c may have a photographing direction substantially opposite to that of the first camera device 195a, and may have different pixels from the first camera device 195a. The second camera device 195b and the third camera device 195c may have different angles of view to expand the shooting range. A mirror (not shown) may be additionally disposed adjacent to the third camera device 195c. In addition, another camera device may be further installed adjacent to the third camera device 195c to be used for capturing a 3D stereoscopic image, or may be used for capturing an additional different angle of view.

The flash 196 may be disposed adjacent to the third camera 195c. The flash 196 illuminates light toward the subject when the subject is photographed by the third camera 195c.

A second sound output module 153b may be additionally disposed in the rear case 100 - 2 . The second sound output module may implement a stereo function together with the first sound output module 153a, and may be used for a call in a speakerphone mode.

A power supply unit 190 for supplying power to the mobile terminal 100 may be mounted on the rear case 100 - 2 side. The power supply unit 190 is, for example, a rechargeable battery, and may be configured integrally with the rear case 100 - 2 or may be detachably coupled to the rear case 100 - 2 for charging or the like.

FIG. 3 is a block diagram of the mobile terminal 100 of FIG. 2 .

Referring to FIG. 3 , the mobile terminal 100 includes a wireless communication unit 110 , an audio/video (A/V) input unit 120 , a user input unit 130 , a sensing unit 140 , an output unit 150 , and a memory. 160 , an interface unit 175 , a terminal control unit 170 , and a power supply unit 190 . When these components are implemented in actual applications, two or more components may be combined into one component, or one component may be subdivided into two or more components as needed.

The wireless communication unit 110 may include a broadcast reception module 111 , a mobile communication module 113 , a wireless Internet module 115 , a short-range communication module 117 , and a GPS module 119 .

The broadcast reception module 111 may receive at least one of a broadcast signal and broadcast-related information from an external broadcast management server through a broadcast channel. A broadcast signal and/or broadcast-related information received through the broadcast reception module 111 may be stored in the memory 160 .

The mobile communication module 113 may transmit/receive a wireless signal to/from at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include a voice call signal, a video call call signal, or various types of data according to text/multimedia message transmission/reception.

The wireless Internet module 115 refers to a module for wireless Internet access, and the wireless Internet module 115 may be built-in or external to the mobile terminal 100 .

The short-range communication module 117 refers to a module for short-range communication. Bluetooth, RFID (Radio Frequency Identification), infrared data association (IrDA), UWB (Ultra Wideband), ZigBee, NFC (Near Field Communication), etc. may be used as short-range communication technologies.

The Global Position System (GPS) module 119 receives location information from a plurality of GPS satellites.

The A/V (Audio/Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera device 195 , a microphone 123 , and the like.

The camera device 195 may process an image frame such as a still image or a moving image obtained by an image sensor in a video call mode or a photographing mode. Then, the processed image frame may be displayed on the display 180 .

The image frame processed by the camera device 195 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110 . Two or more camera devices 195 may be provided according to the configuration of the electronic device.

The microphone 123 may receive an external audio signal by a microphone in a display off mode, for example, a call mode, a recording mode, or a voice recognition mode, and process it as electrical voice data.

Meanwhile, the microphones 123 may be disposed as a plurality of microphones 123 at different positions. The audio signal received from each microphone may be processed by the terminal controller 170 or the like.

The user input unit 130 generates key input data input by the user to control the operation of the electronic device. The user input unit 130 may include a keypad, a dome switch, a touch pad (static pressure/capacitance), and the like, through which a command or information can be input by a user's pressing or touch manipulation. In particular, when the touch pad forms a layer structure with the display 180 to be described later, it may be referred to as a touch screen.

The sensing unit 140 is configured to control the operation of the mobile terminal 100 by sensing the current state of the mobile terminal 100 such as an open/closed state of the mobile terminal 100 , a location of the mobile terminal 100 , and whether or not there is a user's contact. A sensing signal can be generated.

The sensing unit 140 may include a proximity sensor 141 , a pressure sensor 143 , a motion sensor 145 , a touch sensor 146 , and the like.

The proximity sensor 141 may detect an object approaching the mobile terminal 100 or the presence or absence of an object existing in the vicinity of the mobile terminal 100 without mechanical contact. In particular, the proximity sensor 141 may detect a proximity object using a change in an alternating current magnetic field or a change in a static magnetic field, or a change rate of an electrostatic capacity.

The pressure sensor 143 may detect whether pressure is applied to the mobile terminal 100 and the magnitude of the pressure.

The motion sensor 145 may detect a position or movement of the mobile terminal 100 using an acceleration sensor, a gyro sensor, or the like.

The touch sensor 146 may be included in the touch driving device 200 according to an embodiment of the present invention. The touch sensor 146 may detect a touch input by a user's finger or a touch input by a specific pen. For example, when the touch driving device 200 in the form of a touch screen panel is disposed on the display 180, the touch driving device 200 includes a touch sensor ( 146) can be provided. The sensing signal sensed by the touch sensor 146 may be transmitted to the control unit 250 of the touch driving apparatus 200 , and may be transmitted to the terminal control unit 170 .

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display 180 , a sound output module 153 , an alarm unit 155 , and a haptic module 157 .

The display 180 displays and outputs information processed by the mobile terminal 100 . For example, when the mobile terminal 100 is in a call mode, a user interface (UI) or graphic user interface (GUI) related to a call is displayed. In addition, when the mobile terminal 100 is in the video call mode or the shooting mode, the captured or received images may be displayed individually or simultaneously, and a UI and a GUI may be displayed.

Meanwhile, as described above, when the display 180 and the touchpad form a mutually layered structure and are configured as a touch screen, the display 180 may also be used as an input device capable of inputting information by a user's touch in addition to an output device. can

The sound output module 153 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. In addition, the sound output module 153 outputs an audio signal related to a function performed in the mobile terminal 100, for example, a call signal reception sound, a message reception sound, and the like. The sound output module 153 may include a speaker, a buzzer, and the like.

The alarm unit 155 outputs a signal for notifying the occurrence of an event in the mobile terminal 100 . The alarm unit 155 outputs a signal for notifying the occurrence of an event in a form other than an audio signal or a video signal. For example, the signal may be output in the form of vibration.

The haptic module 157 generates various tactile effects that the user can feel. A representative example of the tactile effect generated by the haptic module 157 is a vibration effect. When the haptic module 157 generates vibration as a tactile effect, the intensity and pattern of the vibration generated by the haptic module 157 may be converted, and different vibrations may be synthesized and outputted or output sequentially.

The memory 160 may store a program for processing and control of the terminal control unit 170, and a function for temporary storage of input or output data (eg, phone book, message, still image, video, etc.) can also be performed.

The interface unit 175 functions as an interface with all external devices connected to the mobile terminal 100 . The interface unit 175 may receive data or receive power from an external device and transmit it to each component inside the mobile terminal 100 , and may allow data inside the mobile terminal 100 to be transmitted to an external device.

The mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the terminal control unit 170 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means. The fingerprint recognition sensor may be embedded in the display 180 or the user input unit 130 .

The terminal control unit 170 controls the overall operation of the mobile terminal 100 by generally controlling the operation of each unit. For example, it may perform related control and processing for voice calls, data communications, video calls, and the like. In addition, the terminal control unit 170 may include a multimedia playback module 181 for multimedia playback. The multimedia playback module 181 may be configured as hardware in the terminal control unit 170 , or may be configured as software separately from the terminal control unit 170 .

Meanwhile, the terminal control unit 170 may include an application processor (not shown) for driving an application. Alternatively, the application processor (not shown) may be provided separately from the terminal control unit 170 .

In addition, the power supply unit 190 may receive external power and internal power under the control of the terminal control unit 170 to supply power required for the operation of each component.

The power supply unit 190 may include a connection port, and the connection port may be electrically connected to an external charger that supplies power for charging the battery. Meanwhile, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port.

4 is a diagram illustrating a touch driving apparatus 200 according to an embodiment of the present invention.

The touch driving device 200 may include a touch panel 210 , a sensor circuit 220 , and a controller 230 .

The touch panel 210 may include a plurality of touch electrodes TE.

The sensor circuit 220 applies a first driving signal to the touch panel 210 or applies a first driving signal and a second driving signal, and sensing induced by the first driving signal and/or the second driving signal signal can be received.

The controller 230 may detect a touch input from the detection signal received by the sensor circuit 220 .

When the pen input is not detected after the touch driving device 200 boots, the controller 230 controls to apply the first driving signal to the touch panel 210 , and after the touch driving device 200 boots up After the pen input is detected at least once, the first driving signal and the second driving signal may be applied to the touch panel 210 .

Here, the first driving signal may be a signal for detecting an input by an external object, and the second driving signal may be a signal for detecting a pen input.

The touch driving device 200 may be included in the display unit 180 and the touch panel 210 may be integrally formed with the display panel 182 . Meanwhile, the touch panel 210 is located on the upper surface of the display panel 182 , and the touch driving apparatus 200 may control the touch section separately from the display section of the display panel 182 .

In this drawing, although an embodiment in which the touch panel 210 of the touch driving device 200 is configured separately from the display panel 181 is illustrated, the present invention is not limited thereto.

The display unit 180 may include a display panel 182 , a data driver 183 , a gate driver 184 , and a panel controller 185 .

The display panel 182 may be various types of panels such as a liquid crystal display device (LCD) or an organic light emitting display device (OLED). Hereinafter, for convenience of description, a case in which the display panel 182 is a liquid crystal panel will be described.

The display panel 182 may include a plurality of pixels arranged in a matrix form. In order to drive each pixel, the display panel 182 may include a plurality of data lines DL and a plurality of gate lines GL crossing the data lines.

A pixel is formed at the intersection of the data line and the gate line. In each pixel, a thin film transistor (TFT), a pixel electrode for charging a data voltage to the pixel, and a common electrode for driving the liquid crystal charged in the pixel together with the pixel electrode may be formed.

In addition, a black matrix BM and a color filter may be formed on the display panel 182 .

The panel controller 185 receives a timing signal such as a data enable signal DE and a clock signal CLK, and generates control signals for operations of the data driver 183 and the gate driver 184 .

The gate driver 184 sequentially applies scan pulses to the gate lines GL according to the control signal generated by the panel controller 185 .

The data driver 183 applies a data voltage corresponding to image data to the data lines DL according to the control signal generated by the panel controller 185 . In detail, a data voltage may be selectively applied to each of the data lines DL during a period in which the scan pulse is applied to the gate line GL.

The touch panel 210 of the touch driving device 200 may be formed or attached to the upper surface of the display panel 182 . For example, the touch panel 210 may be formed or attached to the display panel 182 as an in-cell type, an on-cell type, an Add-On type, or a hybrid in-cell type. have.

In the in-cell type touch panel, touch electrodes are embedded in the display panel 182 . The on-cell type touch panel is directly formed on the upper surface of the substrate constituting the display panel 182 . The add-on type touch panel is manufactured independently of the display panel 182 that outputs an image, and then is attached to the display panel 182 . In the hybrid in-cell type touch panel, some of the touch electrodes constituting the touch panel 210 may be formed on a substrate constituting the display panel 182 .

The touch panel 210 may be a touch panel using a capacitive method. The touch panel 210 may be configured in a mutual-capacitance method or may be configured in a self-capacitance method. In the mutual cap method, a driving electrode to which a touch driving voltage is sequentially supplied and a receiving electrode for receiving a sensing signal generated by the touch driving voltage are included. Meanwhile, in the self-cap method, a driving signal may be sequentially supplied to the touch electrodes, and a sensing signal may be received from the corresponding touch electrodes.

FIG. 5 shows the structure of the electronic pen 300 of the touch driving system 10 of FIG. 1 .

The electronic pen 300 may receive a driving signal from the touch panel 210 and transmit a downlink signal to the touch electrode TE of the touch panel 210 . Specifically, the electronic pen 300 may be an active electrostatic pen (AES pen).

The electronic pen 300 may include a pen tip 310 , a receiver 320 , a transmitter 330 , a pen controller 340 , and a battery 350 .

The pen tip 310 may contact or be close to the touch panel 210 of the touch driving device 200 . The pen tip 310 may generate an alternating electric field according to the downlink signal supplied from the transmitter 330 , and generate electric charge according to the driving signal transmitted from the touch panel 210 and supply it to the receiver 320 . have. The pen tip 310 may be a conductor.

The receiver 320 may receive the second driving signal applied to the touch panel 210 through the pen tip 310 . The receiver 320 may provide the second driving signal to the pen controller 340 . The second driving signal may include at least one of pilot data, tip selection data, and ring selection data.

The transmitter 330 may transmit a downlink signal including pen information generated based on the second driving signal. The transmitter 330 may transmit the downlink signal generated by the pen controller 340 to the touch panel 210 through the pen tip 310 . The downlink signal may include at least one of pen identification information (Pen ID), pen pressure, battery status, tip data, and ring data.

The pen control unit 340 generates a downlink signal including pen information based on the second driving signal received by the receiving unit 320 , and transmits the downlink signal through the transmitting unit 330 . control, and can control all functions related to driving of the electronic pen 300 .

On the other hand, the pen control unit 340 controls the operation state of a button (not shown) installed in the electronic pen 300 , the pen pressure value detected by the pen pressure detection unit (not shown) through the pen tip 310 , and the battery 350 . It is possible to output pen data such as remaining amount state data.

The battery 350 may apply power for operation of each circuit of the electronic pen 300 .

Meanwhile, the electronic pen 300 may further include a storage unit (not shown), and may store pen identification information, pen data, and the like, in the storage unit.

The electronic pen 300 may be a pen capable of two-way communication or a pen capable of one-way communication. A pen capable of bidirectional communication means a pen that receives information transmitted from a touch driving device, generates information corresponding thereto, and transmits the generated information to the touch driving device. A pen capable of one-way communication refers to a pen that generates pen-related information and transmits the generated information to a touch driving device.

For example, a pen capable of two-way communication may be an Active ElectroStatic 2.0 (AES 2.0) pen, and a pen capable of one-way communication may be an AES 1.0 pen.

Hereinafter, when the touch driving device 200 determines the touch input, detects the electronic pen 300 input, and after the touch driving device 200 boots, the pen input is detected at least once and the case where it is not detected By dividing, the application of the driving signal will be described in detail.

FIG. 6 illustrates transmission and reception of uplink and downlink signals between the touch driving device 200 and the electronic pen 300 of FIG. 4 .

The controller 230 of the touch driving device 200 applies a first driving signal to the touch electrodes TE of the touch panel 210 or a first driving signal to detect a touch input. The sensor circuit 220 may be controlled to apply the signal and the second driving signal together.

Specifically, the controller 230 controls to apply the first driving signal to the touch electrodes TE of the touch panel 210 when a pen input is never detected after the touch driving device 200 boots. When the pen input is detected at least once after the touch driving device 200 boots up, that is, after the first pen input is detected, the first driving signal is transmitted to the touch electrodes TE of the touch panel 210 . and a second driving signal may be applied.

Here, the first driving signal is a signal for detecting a touch input or proximity by an external object including a body part such as a finger or a passive pen, and the second driving signal is a touch input by an electronic pen such as an active pen or This is a signal for detecting proximity.

When a pen input has never occurred after the device boots, the user of the electronic device (eg, the mobile terminal 100) including the touch driving device 200 is in a state in which the user does not use the pen, so the controller 230 controls the external By applying only the first driving signal for detecting the input or proximity of an object to the touch electrodes TE of the touch panel 210, power consumption of the electronic device by supplying the second driving signal can be reduced.

Meanwhile, the controller 230 may detect a pen input by the electronic pen 300 in a state where only the first driving signal is applied. To this end, when a touch input is detected, the controller 230 applies an uplink signal to the touch electrodes TE of the touch panel 210 and determines whether the touch input is a pen input according to whether a downlink signal is received. can be judged

Specifically, the controller 230 may detect a touch input from a sensing signal corresponding to the first driving signal. The corresponding touch input may be an input by an external object or an input by an electronic pen.

The controller 230 may distinguish whether the detected touch input is an input by an external object or an input by an electronic pen. To this end, the controller 230 may apply an uplink signal for detecting the electronic pen to the touch electrodes TE of the touch panel 210 .

When the downlink signal is received, the controller 230 may determine that the touch input is a pen input, and when the downlink signal is not received, the controller 230 may determine that the touch input is not a pen input.

A special signal is not transmitted from an external object including a body part such as a finger or a passive pen, and a downlink signal is transmitted from an active pen. Accordingly, the controller 230 may distinguish whether the touch input is an input by an external object or a pen input based on whether a downlink signal is received.

When the pen input is detected, the controller 230 may apply the first driving signal and the second driving signal together to the touch electrodes TE of the touch panel 210 in order to detect the pen input later. Also, when the pen input is not detected, the controller 230 may apply the first driving signal to the touch electrodes TE of the touch panel 210 .

After the pen input is detected at least once, the controller 230 receives a downlink signal from the electronic pen 300 by applying the second driving signal to the touch electrodes TE, and receives the downlink signal from the received downlink signal. In addition to the pen touch input coordinates, it is possible to grasp pen-related information such as pen pressure of the pen, a tilt angle of the pen, and remaining battery state information.

FIG. 7 illustrates a driving signal applied to the touch panel 210 of the touch driving device 200 of FIG. 6 .

Referring to the drawing, the controller 230 applies a first driving signal to the touch electrodes TE of the touch panel 210 when a pen input is never detected after the touch driving device 200 boots. After the touch driving device 200 boots up, when a pen input is detected at least once, that is, after the first pen input is detected, the first touch electrodes TE of the touch panel 210 are applied. The driving signal and the second driving signal may be controlled to be applied.

Referring to FIG. 7A , the controller 230 may periodically apply a first driving signal to the touch panel 210 of the touch driving device 200 .

The first driving signal is a signal for detecting a touch input or proximity by an external object including a body part such as a finger or a passive pen.

The controller 230 may control the sensor circuit 220 so that the first driving signal is applied to the touch electrode TE at a constant cycle or a constant frequency (f _{1 Hz).}

The first driving signal may include a first sensing signal including a plurality of pulses for detecting a touch from an external object. The first sensing signal may be a pulse signal having _a constant frequency (f a Hz). For example, the frequency fa of the first sensing signal may be 354 kHz, but the frequency of the first sensing signal is not limited thereto.

Referring to FIG. 7B , after booting of the touch driving device 200 and after detecting a pen input at least once, the controller 230 periodically transmits the first driving signal and the second driving signal to the touch driving device. It can be applied to the touch panel 210 of 200 .

The second driving signal is a signal for detecting a touch input or proximity by the active pen.

The controller 230 may control the sensor circuit 220 so that the second driving signal is applied to the touch electrode TE at a constant cycle or a constant frequency (f _{2 Hz).}

The second driving signal detects an uplink signal including information to be transmitted to the active pen and a touch from the active pen, and a second sensing signal composed of a plurality of pulses for detecting a downlink signal transmitted from the active pen. signal) may be included. The second sensing signal may be a pulse signal having a constant frequency (f _{b Hz).} For example, the frequency f _b of the second sensing signal may be 1.8 MHz, but the frequency of the second sensing signal is not limited thereto. Meanwhile, the second driving signal may include only the second sensing signal.

The uplink signal may include pilot data. Meanwhile, the uplink signal may further include Tip selection data and Ring selection data.

Here, the pilot data may be data including information that enables the touch driving device 200 and the active pen to recognize a counterpart device. The tip selection data is a signal for requesting tip data transmitted from the pen tip 310 included in the pen, and the ring selection data is a signal for requesting data from a ring (not shown) included in the pen.

The downlink signal may include pen identification information (Pen ID) and pen pressure data. Meanwhile, the downlink signal may further include battery state data, Tip data, Ring data, and the like.

Here, the pen pressure data is data including a pressure value applied through the pen tip 310 when the electronic pen contacts the touch panel 210 . The battery state data may be data including a current remaining amount of a battery of the electronic pen. Tip data may be information transmitted from the pen tip 310 , and Ring data may be information transmitted from the ring of the electronic pen. The controller 230 may compare the Tip data and the Ring data, calculate the relative positions of the Tip and the Ring, and derive a tilt angle of the electronic pen based on this.

Meanwhile, when a downlink signal is received from the electronic pen 300 , the controller 230 may determine whether the electronic pen 300 is bidirectional or unidirectional based on the downlink signal. For example, the controller 230 may determine whether the electronic pen 300 is an Active ElectroStatic 2.0 (AES 2.0) pen or an AES 1.0 pen, based on the downlink signal.

_{Meanwhile, the magnitude A 21} of the uplink signal included in the second driving signal may be greater than _{the magnitude A 22} of the second sensing signal. For example, the magnitude A ₂₁ of the uplink signal may be 3V or 6V, and the magnitude A ₂₂ of the second sensing signal may be 1.8V. However, the magnitude of the uplink signal and the magnitude of the second sensing signal are not limited thereto, and may have voltage values of various magnitudes.

_{Meanwhile, the magnitude A 1} of the first sensing signal included in the first driving signal may be equal to _{the magnitude A 22} of the second sensing signal included in the second driving signal. For example, the magnitude A ₁ of the first sensing signal and the magnitude A ₂₂ of the second sensing signal may be 1.8V. However, the magnitude of the first sensing signal and the magnitude of the second sensing signal are not limited thereto, and may have voltage values of various magnitudes.

An operation for the touch driving apparatus 200 to detect a touch input may be divided into a plurality of sections. The controller 230 may apply the first driving signal and the second driving signal to the touch electrode TE of the touch driving apparatus 200 for each section. Hereinafter, operations for each touch input section of the touch driving apparatus 200 will be described in detail with reference to FIGS. 8 to 15 .

8 to 15 are diagrams illustrating a chant signal applied by the touch driving device 200 according to a touch input section and an input signal of the electronic pen 300 according thereto.

Specifically, FIGS. 8 to 11 show driving signals of the waiting section W1, the pen detecting section D1, the sensing section S1, and the waiting section W2 in a state before the first pen detection, FIGS. 12 to 15 shows driving signals in the waiting period W3, pen detecting period D2, sensing period S2, and standby period W4 in a state after the pen is detected.

For convenience of description, the first driving signal and the second driving signal are illustrated separately on different time axes. However, it should be understood that the first driving signal and the second driving signal are time-divided and applied through the same touch electrode TE.

The touch input section of the touch driving device 200 may be divided into a waiting section, a pen detecting section, and a touch sensing mode.

The controller 230 may control the first driving signal and the second driving signal in each section. _{For example, the controller 230 may differently control the first driving frequency f 1} for applying the first driving signal to the touch electrode TE for each section, and the touch electrode TE of the second driving signal Whether to apply (ON/OFF) can be differently controlled for each section, and the second driving frequency f ₂ for applying the second driving signal to the touch electrode TE can be differently controlled for each section.

First, an operation of sensing a touch input in a state in which the pen is never detected will be described.

8 illustrates the operation of the waiting period W1 in a state before the first pen detection. Referring to FIG. 8 , the controller 230 transmits the first driving signal to the touch electrode TE in order to sense the touch input in a state in which the pen input is never detected after the touch driving device 200 is booted. It is possible to control the sensor circuit 220 to apply.

Here, in the absence of a touch input, a period in which the controller 230 applies the first driving signal or the first driving signal and the second driving signal in order to sense the touch input may be referred to as a standby period.

The controller 230 may apply the first driving signal to the touch electrode TE _{at the 1-1 standby frequency f 1w1 in the standby period W1 .} The 1-1 standby frequency f _1w1 may be, for example, 70 Hz, but is not limited thereto.

Also, the controller 230 may control the second driving signal not to be applied to the touch electrode TE. Accordingly, only the first driving signal may be applied to the touch electrode TE.

Accordingly, the touch driving apparatus 200 may minimize the current applied to the touch electrode TE for sensing the touch input while the pen input is never detected.

In addition, the touch driving apparatus 200 does not apply a driving signal for pen recognition in a waiting period or a sensing period in a state in which a pen input has never been recognized, so that the electronic device is not used in an environment in which the electronic pen is not used. It has the effect of increasing the use time.

9 shows the operation of the pen detecting section D1 in a state before the first pen detection. Referring to FIG. 9 , when a touch input is generated through the touch electrode TE in the waiting period, the controller 230 may control the sensor circuit 220 to perform a pen detecting operation.

When a touch input is generated in the waiting period W1 , the controller 230 may detect the touch input from a sensing signal corresponding to the first driving signal. The corresponding touch input may be an input by an external object or an input by an electronic pen.

The controller 230 may distinguish whether the detected touch input is an input by an external object or an input by an electronic pen. To this end, the controller 230 may apply an uplink signal for detecting the electronic pen to the touch electrodes TE of the touch panel 210 .

Here, a section in which the controller 230 applies an uplink signal in response to a touch input generated in the standby section may be referred to as a pen detecting section D1.

In the pen detection period D1 , the controller 230 may control the sensor circuit 220 to apply the second driving signal for pen detection to the touch electrode TE.

In this case, the controller 230 may control the second driving signal to be periodically applied to the touch electrode TE at the _{detecting frequency f 2d .} The second driving signal may include an uplink signal and a second sensing signal.

The uplink signal is a signal for detecting the electronic pen 300 or distinguishing the type of the electronic pen 300 , and the second sensing signal is a pen touch input by sensing a downlink signal transmitted from the electronic pen 300 . It is a signal for identifying not only the coordinates but also pen-related information such as pen pressure of the pen, the inclination angle of the pen, and battery state information.

Here, the detecting frequency f _2d may be 200 Hz, but is not limited thereto. Meanwhile, the detecting frequency f _2d may be set to be the same as the frequency at which the downlink signal is transmitted from the unidirectional active pen.

The controller 230 may determine whether the touch input is a pen input according to whether a downlink signal is received.

When a downlink signal is received (cases 1 and 2), the controller 230 determines that the touch input is a pen input, and when a downlink signal is not received (case 3), determines that the touch input is not a pen input can do.

Meanwhile, when a downlink signal is received from the electronic pen 300 , the controller 230 may determine whether the electronic pen 300 is bidirectional or unidirectional based on the downlink signal. For example, the controller 230 may determine whether the electronic pen 300 is an Active ElectroStatic 2.0 (AES 2.0) pen or an AES 1.0 pen, based on the downlink signal.

Specifically, the controller 230 may compare the sync between the received downlink signal and the second sensing signal, and determine whether the pen is bidirectional or unidirectional according to whether the sync matches.

For example, the control unit 230, as shown in case 1 of FIG. 9, when the timing of the received downlink signal and the second sensing signal coincide with each other or within a set value, the received downlink signal It may be determined that the link signal is synchronized with the second sensing signal.

To this end, the controller 230 may control the sensor circuit 220 to include the first synchronization signal in the uplink signal to be applied to the touch electrode TE.

When the electronic pen 300 is an active pen (AES 2.0) of a two-way communication method, the electronic pen 300 generates a downlink signal based on the first synchronization signal included in the uplink signal to generate the touch driving device 200 . ) can be transmitted to the touch panel 210 . The electronic pen 300 may synchronize the internal operation timing of the pen with the operation timing of the touch driving device 200 using the first synchronization signal. For example, the electronic pen 300 may synchronize an operating frequency or an operating timing within a frequency range of 40 Hz to 360 Hz, but is not limited thereto.

In this case, the downlink signal transmitted by the electronic pen 300 may be synchronized with the second sensing signal. Accordingly, the controller 230 may determine that the electronic pen 300 is an active pen (AES 2.0) of a two-way communication method (case 1 of FIG. 9 ).

On the other hand, the control unit 230, as shown in case 2 of FIG. 9, when the timing (timing) of the received downlink signal and the second sensing signal does not match with each other or there is a difference of more than a set value, the received downlink signal It may be determined that the link signal is not synchronized with the second sensing signal.

When the electronic pen 300 is a one-way communication type active pen (AES 1.0), the electronic pen 300 generates a downlink signal irrespective of the uplink signal to the touch panel 210 of the touch driving device 200 . ) is sent to The electronic pen 300 operates according to the internal operation timing of the pen regardless of the first synchronization signal.

In this case, in the downlink signal transmitted by the electronic pen 300 , the second sensing signal and the sync do not match each other, or there is a difference by more than a set value. Accordingly, the controller 230 may determine that the electronic pen 300 is an active pen (AES 1.0) of a one-way communication method (case 2 of FIG. 9 ).

Meanwhile, the controller 230 may determine whether the pen is bidirectional or unidirectional based on the content of data included in the downlink signal.

The downlink signal transmitted from the electronic pen 300 may include pen identification information (Pen ID) and pen pressure data. Meanwhile, the downlink signal may further include battery state data, Tip data, Ring data, and the like.

When the electronic pen 300 is an active pen (AES 2.0) of a two-way communication method, the downlink signal may include pen identification information, pen pressure data, battery state data, tip data, and ring data. On the other hand, when the electronic pen 300 is a one-way communication type active pen (AES 1.0), the downlink signal does not include ring data.

Accordingly, when the downlink signal includes Ring data, the control unit 230 may determine that the electronic pen 300 is an active pen (AES 2.0) of a two-way communication method, and the downlink signal includes Ring data. If not, it may be determined that the electronic pen 300 is an active pen (AES 1.0) of a one-way communication method.

Meanwhile, the controller 230 may determine whether the electronic pen is bidirectional or unidirectional based on whether the received downlink signal is synchronized with the second sensing signal and the content of data included in the downlink signal.

Meanwhile, as illustrated in case 3 of FIG. 9 , when a downlink signal is not received, the controller 230 may determine that the touch input is not a pen input.

Meanwhile, in FIG. 9 , it is illustrated that the first driving signal is not applied to the touch electrode TE in the pen detecting period D1 . can be controlled to be applied.

FIG. 10 shows the operation of the sensing section S1 according to the type of the detected touch input. Referring to FIG. 10 , when the type of the touch input is determined in the pen detecting section D1 , the controller 230 may control the sensor circuit 220 to sense the continuously input touch input.

The controller 230 is configured to control a first driving signal and/or a second driving signal in the case of a two-way communication type active pen (case 1), a case of a one-way communication type active pen (case 2), and an external object (case 3). may be applied to the touch panel TE.

Here, a section in which the controller 230 applies the first driving signal and/or the second driving signal according to the type of the touch input may be referred to as a sensing section S1.

First, a case (case 1) in which the touch input determined in the pen detecting section D1 is a bidirectional communication type active pen will be described.

When the touch input is a bidirectional active pen, the controller 230 may control the second driving signal to be periodically applied to the touch electrode TE _{at the 2-1 th sensing frequency f 2s1 .} The second driving signal includes an uplink signal and a second sensing signal.

Here, the 2-1 sensing frequency f _2s1 may be 240 Hz, but is not limited thereto. Meanwhile, the _2-1th sensing frequency f 2s1 may be greater than the detection frequency f _{2d .}

When a downlink signal is received from the electronic pen 300 , the controller 230 may calculate coordinates at which a pen touch is input on the touch panel 210 based on the received downlink signal. Also, the controller 230 may further derive a pen pressure, an inclined angle of the pen, battery state information, and the like, based on the pen-related information included in the received downlink signal.

The control unit 230 transmits the calculated coordinate information and the derived pen-related information to the terminal control unit 170 of the electronic device including the touch driving device 200 or the panel control unit 185 of the display unit 180 . can

Meanwhile, the controller 230 may control the first driving signal to be periodically applied to the touch electrode TE _{at the 1-2 standby frequency f 1w2 .} The first driving signal includes a first sensing signal.

Here, the 1-2 standby frequency f _1w2 may be 40 Hz, but is not limited thereto.

Meanwhile, the 1-2 _th standby frequency f _1w2 may be smaller than the 1-1 th standby frequency f 1w1 . That is, as in case 1 of FIG. 10 , when the pen input is detected, the period of applying the first driving signal may be longer than the period of applying the first driving signal when the touch input is not detected (standby state W1). have.

When a touch is input to the touch panel 210 once, it is common that the same type of touch input is continuously input. When a touch by a pen is input to the touch panel 210 , the pen input may be continuously input. Accordingly, in a state in which a touch by a pen is input, the controller 230 sets the standby frequency of the first driving signal for detecting the input of an external object to be smaller than the standby frequency input in the standby state W1. , power consumed by the touch driving device 200 may be reduced.

Meanwhile, the 2-1 _th sensing frequency f 2s1 may be greater than _{the 1-2 th} standby frequency f 1w2 .

Accordingly, the touch driving apparatus 200 may set different driving signals applied in the touch input state according to the type of the input touch, thereby minimizing power consumption and increasing the accuracy of touch sensing.

Next, a case in which the touch input determined in the pen detecting section D1 is a one-way communication type active pen (case 2) will be described.

When the touch input is a unidirectional active pen, the controller 230 may control the second driving signal to be periodically applied to the touch electrode TE at the _{2-2nd sensing frequency f 2s2 .} The second driving signal may include an uplink signal and a second sensing signal. Meanwhile, the second driving signal may not include the uplink signal and may include only the second sensing signal.

Here, the 2-2 sensing frequency f _2s2 may be 200 Hz, but is not limited thereto. Meanwhile, the second-second sensing frequency f _2s2 may be the same as the detection frequency f _{2d .}

The unidirectional active pen transmits a downlink signal at a frequency of a certain magnitude. Accordingly, the _2-2nd sensing frequency f 2s2 may be set to be the same as the frequency of the downlink signal transmitted from the unidirectional active pen.

When a downlink signal is received from the electronic pen 300 , the controller 230 may calculate coordinates at which a pen touch is input on the touch panel 210 based on the received downlink signal. Also, the controller 230 may further derive pen pressure, battery state information, and the like, based on the pen-related information included in the received downlink signal.

The control unit 230 transmits the calculated coordinate information and the derived pen-related information to the terminal control unit 170 of the electronic device including the touch driving device 200 or the panel control unit 185 of the display unit 180 . can

Meanwhile, the controller 230 may control the first driving signal to be periodically applied to the touch electrode TE _{at the 1-2 standby frequency f 1w2 .} The first driving signal includes a first sensing signal.

Here, the 1-2 standby frequency f _1w2 may be 40 Hz, but is not limited thereto.

Meanwhile, the 1-2 _th standby frequency f _1w2 may be smaller than the 1-1 th standby frequency f 1w1 . That is, as in case 2 of FIG. 10 , when the pen input is detected, the period of applying the first driving signal may be longer than the period of applying the first driving signal when the touch input is not detected (standby state W1). have.

Meanwhile, the _2-2nd sensing frequency f 2s2 may be greater than the _1-2nd standby frequency f 1w2 .

Accordingly, the touch driving apparatus 200 may set different driving signals applied in the touch input state according to the type of the input touch, thereby minimizing power consumption and increasing the accuracy of touch sensing.

Next, a case in which the touch input determined in the pen detecting section D1 is not an active pen but an external object (case 3) will be described.

When the touch input is caused by an external object, the controller 230 may control the first driving signal to be periodically applied to the touch electrode TE _{at the first sensing frequency f 1s .} The first driving signal includes a first sensing signal.

Here, the first sensing frequency f _1s may be 120 Hz, but is not limited thereto.

The first sensing frequency f _1s may be greater than the 1-1 standby frequency f _1w1 or the 1-2 _{th standby frequency f 1w2 .}

That is, a period of applying the first driving signal when an input by an external object is not detected may be longer than a period of applying the first driving signal when an input by an external object is detected.

When a touch by an external object is input, the touch may be continuously input. Therefore, in order to increase the accuracy of sensing the touch input, the controller 230 is higher than _{the 1-1 standby frequency f 1w1} for applying the first driving signal in the standby state W1 in which an input by an external object is not detected. , in a state where an input by an external object is detected, the first sensing frequency f _1s for applying the first driving signal may be controlled to be greater.

Meanwhile, the first sensing frequency f _1s may be smaller than the 2-1 sensing frequency f _2s1 or the 2-2 sensing frequency f _{2s2 .} That is, a period of applying the second driving signal when a pen input is detected may be shorter than a period of applying the first driving signal when an external object input is detected.

Accordingly, the controller 230 can increase the accuracy of sensing the touch input by the pen.

When the touch input determined in the pen detecting period D1 is caused by an external object, the controller 230 may control so that the second driving signal is not applied to the touch electrode TE.

The controller 230 may control so that only the first driving signal is applied to the touch electrode TE because the input by the pen is never sensed.

11 shows the operation of the waiting period W2 after the sensing period S1. Referring to FIG. 11 , the controller 230 transmits the first driving signal and/or the second driving signal to the touch electrode TE in order to sense the touch input when there is no touch input for more than a predetermined time after a touch is input. It is possible to control the sensor circuit 220 to apply.

Here, in the absence of a touch input, a period in which the controller 230 applies the first driving signal or the first driving signal and the second driving signal in order to sense the touch input may be referred to as a waiting period W2. .

The controller 230 may control to apply the first driving signal or the first driving signal and the second driving signal in the waiting period W2 according to whether a pen input is detected.

First, cases in which the touch input determined in the pen detecting period D1 or the sensing period S1 is an active pen (cases 1 and 2) will be described.

When the touch input determined in the pen detecting period D1 or the sensing period S1 is an active pen of a bidirectional method or a unidirectional method, the controller 230 controls the first driving signal and the second driving signal in the standby period W2. can be controlled to apply.

The controller 230 may apply the first driving signal to the _{touch electrode TE at the 1-1 standby frequency f 1w1} , and touch the second driving signal at the 2-1 standby frequency f _2w1 . It may be applied to the electrode TE.

The 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be the same as each other. For example, the 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be 70 Hz, but are not limited thereto.

Since the pen input has been detected at least once, the pen input may be further detected later. Accordingly, in a state in which the pen input is detected at least once, the controller 230 applies the first driving signal and the second driving signal to the touch electrode TE to effectively detect the pen input and the external object input. do. Meanwhile, only the second sensing signal may be included in the second driving signal applied in the waiting period W2.

Next, a case in which the touch input determined in the pen detecting section D1 or the sensing section S1 is an external object (case 3) will be described.

When the touch input determined in the pen detecting period D1 or the sensing period S1 is an external object, the controller 230 may control to apply the first driving signal in the waiting period W2.

The controller 230 may apply the first driving signal to the touch electrode TE _{at the 1-1 standby frequency f 1w1 in the standby period W2 .} The 1-1 standby frequency f _1w1 may be, for example, 70 Hz, but is not limited thereto.

Also, the controller 230 may control the second driving signal not to be applied to the touch electrode TE. Accordingly, only the first driving signal may be applied to the touch electrode TE.

In this case, the operation of the waiting period W2 may be the same as the operation of the waiting period W1 .

Accordingly, in a state in which a pen input is never detected, the current applied to the touch electrode TE for sensing the touch input may be minimized.

In addition, the touch driving apparatus 200 does not apply a driving signal for pen recognition in a waiting period or a sensing period in a state in which a pen input has never been recognized, so that the electronic device is not used in an environment in which the electronic pen is not used. It has the effect of increasing the use time.

Next, an operation of sensing a touch input in a state in which the pen is detected at least once will be described.

12 illustrates the operation of the waiting period W3 after the pen is detected at least once. Referring to FIG. 12 , the controller 230 touches the first driving signal and the second driving signal to sense the touch input in a state where the pen input is detected at least once after booting the touch driving device 200 . The sensor circuit 220 may be controlled to apply to the electrode TE.

Here, in the absence of a touch input, a period in which the controller 230 applies the first driving signal and the second driving signal in order to sense the touch input may be referred to as a waiting period W3.

Since the pen input is detected at least once in the previous pen detecting section or sensing section, the controller 230 may control the sensor circuit 220 to apply the first driving signal and the second driving signal in the waiting section W3. have.

The controller 230 may apply the first driving signal to the _{touch electrode TE at the 1-1 standby frequency f 1w1} , and touch the second driving signal at the 2-1 standby frequency f _2w1 . It may be applied to the electrode TE.

The 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be the same as each other. For example, the 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be 70 Hz, but are not limited thereto.

Since the pen input has been detected at least once, the pen input may be further detected later. Accordingly, in a state in which the pen input is detected at least once, the controller 230 applies the first driving signal and the second driving signal to the touch electrode TE to effectively detect the pen input and the external object input. do. Meanwhile, the second driving signal applied in the waiting period W3 may include only the second sensing signal.

In this case, the operation of the waiting period W3 may be the same operation as cases 1 and 2 of the waiting period W2.

13 illustrates an operation of the pen detecting section D2 after the pen is detected at least once. Referring to FIG. 13 , when a touch input is generated through the touch electrode TE in the waiting period, the controller 230 may control the sensor circuit 220 to perform a pen detecting operation.

Here, a period in which the controller 230 applies a second driving signal including an uplink signal in response to a touch input generated in the standby period may be referred to as a pen detection period D2.

Since cases 4, 5, and 6 of the pen detecting section D2 are the same as cases 1, 2, and 3 of the pen detecting section D1 described above, a detailed description thereof will be omitted.

14 illustrates the operation of the sensing section S2 according to the type of the detected touch input. Referring to FIG. 14 , when the type of the touch input is determined in the pen detecting section D2 , the controller 230 may control the sensor circuit 220 to detect the continuously input touch input.

The controller 230 touches the first driving signal and the second driving signal with respect to the case of the two-way communication type active pen (case 4), the case of the one-way communication type active pen (case 5), and the case of an external object (case 6) It can be applied to the panel (TE).

Here, a section in which the controller 230 applies the first driving signal and the second driving signal according to the type of touch input may be referred to as a sensing section S2.

Since the touch input determined in the pen detecting section D2 is the same as case 1 and case 2 of the sensing section S1, in the case of the two-way communication type active pen (case 4) and the unidirectional communication type active pen (case 5), , a detailed description is omitted.

Hereinafter, a case where the touch input determined in the pen detecting section D2 is not an active pen but an external object (case 6) will be described.

When the touch input is caused by an external object, the controller 230 may control the first driving signal to _{be periodically applied to the touch electrode TE at the first sensing frequency f 1s} , and the second driving signal may be applied to the second driving signal. 2-2 It can be controlled to be periodically applied to the touch electrode TE with the standby frequency f _{2w2 .}

Here, the 2-2 standby frequency f _2w2 may be 40 Hz, but is not limited thereto.

Meanwhile, the _2-2nd standby frequency f _2w2 may be the same as the 1-2nd standby frequency f 1w2 .

Meanwhile, the _2-2nd standby frequency f 2w2 may be smaller than the 2nd-1st standby frequency f _{2w1 .} That is, when an external object input is detected as in case 6, the period of applying the second driving signal may be longer than the period of applying the second driving signal when the touch input is not detected (standby state W3).

When a touch is input to the touch panel 210 once, it is common that the same type of touch input is continuously input. When a touch by an external object is input to the touch panel 210 , an input by an external object may be continuously input. Accordingly, in a state in which a touch by an external object is input, the controller 230 sets the standby frequency of the second driving signal for sensing the pen input to be smaller than the standby frequency input in the standby state W3, Power consumed by the touch driving device 200 may be reduced.

Meanwhile, the _2-2nd standby frequency f 2w2 and the 2-1th standby frequency f _2w1 may be smaller than the _2-1th sensing frequency f _{2s1 and the 2-2nd sensing frequency f 2s2 .} .

That is, the period of applying the second driving signal when the pen input is not detected may be longer than the period of applying the second driving signal when the pen input is detected.

When a touch by a pen is input, the touch may be continuously input. Therefore, in order to increase the accuracy of sensing the touch input, the control unit 230 is higher than _{the 2-1 standby frequency f 2w1} for applying the second driving signal in the standby state W3 in which the input by the pen is not detected, 2-1 sensing frequency for applying a second drive signal in a state in which the input pen is detected by (f _2s1) and the second-second sensing frequency (f _2s2) is can be controlled to be larger.

Meanwhile, the first sensing frequency f _1s may be greater than the 1-1 standby frequency f _1w1 or the 1-2 standby frequency f _{1w2 .}

That is, a period of applying the first driving signal when an input by an external object is not detected may be longer than a period of applying the first driving signal when an input by an external object is detected.

When a touch by an external object is input, the touch may be continuously input. Accordingly, in order to increase the accuracy of sensing the touch input, the controller 230 is higher than _{the 1-1 standby frequency f 1w1} for applying the first driving signal in the standby state W3 in which an input by an external object is not detected. , in a state where an input by an external object is detected, the first sensing frequency f _1s for applying the first driving signal may be controlled to be greater.

Meanwhile, the first sensing frequency f _1s may be smaller than the 2-1 sensing frequency f _2s1 or the 2-2 sensing frequency f _{2s2 .} That is, a period of applying the second driving signal when a pen input is detected may be shorter than a period of applying the first driving signal when an external object input is detected.

Accordingly, the controller 230 can increase the accuracy of sensing the touch input by the pen.

15 shows the operation of the waiting period W4 after the sensing period S2. Referring to FIG. 15 , the controller 230 applies a first driving signal and a second driving signal to the touch electrode TE in order to sense the touch input when there is no touch input for more than a predetermined time after a touch is input. The sensor circuit 220 may be controlled to do so.

Here, in the absence of a touch input, a period in which the controller 230 applies the first driving signal and the second driving signal to sense the touch input may be referred to as a waiting period W4.

Since the pen input has been detected at least once in the previous pen detecting section or sensing section, the controller 230 may control the sensor circuit 220 to apply the first driving signal and the second driving signal in the standby section W4. have.

The controller 230 may apply the first driving signal to the _{touch electrode TE at the 1-1 standby frequency f 1w1} , and touch the second driving signal at the 2-1 standby frequency f _2w1 . It may be applied to the electrode TE.

The 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be the same as each other. For example, the 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be 70 Hz, but are not limited thereto.

Since the pen input has been detected at least once, the pen input may be further detected later. Accordingly, in a state in which the pen input is detected at least once, the controller 230 applies the first driving signal and the second driving signal to the touch electrode TE to effectively detect the pen input and the external object input. do. Meanwhile, only the second sensing signal may be included in the second driving signal applied in the waiting period W4.

In this case, the operation of the waiting period W4 may be the same as the operation of the waiting period W3 .

16 to 17 are diagrams illustrating that the first driving signal and the second driving signal are time-divided and input in the waiting section and the sensing section.

8 to 15, for convenience, the first driving signal and the second driving signal are shown separately on different time axes. However, the first driving signal and the second driving signal are the same touch electrode TE. It is time-shared through

16 is a diagram illustrating that the first driving signal and the second driving signal are time-divided and applied in the waiting period. Referring to FIG. 16 , in the waiting period, the controller 230 controls the first driving signal to be applied to the touch electrode TE or the first driving signal and the second driving signal to be applied to the touch electrode TE. can do.

Referring to (a) of FIG. 16 , the controller 230 transmits the first driving signal to the touch electrode in order to detect the touch input in a state in which the pen input is never detected after the touch driving device 200 is booted. The sensor circuit 220 may be controlled to apply (TE).

The controller 230 may apply the first driving signal to the touch electrode TE _{at the 1-1 standby frequency f 1w1 .} The time for which the first driving signal is applied to the touch electrode TE may be _{changed as} needed within one period (1/f 1w1 ) during which the first driving signal is applied.

For example, in order to increase the sensing accuracy of the external object input sensed by the first driving signal, the controller 230 may set a long time for the first driving signal to be applied to the touch electrode TE. Meanwhile, in order to reduce power consumption consumed by the first driving signal, the controller 230 may set a short time for which the first driving signal is applied to the touch electrode TE.

Referring to (b) of FIG. 16 , the control unit 230 is configured to detect a touch input at least once after booting of the touch driving device 200, so as to detect a touch input using a first driving signal and a second driving signal. The sensor circuit 220 may be controlled to apply the driving signal to the touch electrode TE.

The controller 230 applies the first driving signal to the _{touch electrode TE at the 1-1 standby frequency f 1w1} , and applies the second driving signal to the touch electrode TE at the 2-1 standby frequency f _2w1 . TE) may be approved.

Here, the 1-1 standby frequency f _1w1 and the 2-1 standby frequency f _2w1 may be the same.

The first driving signal and the second driving signal may be time-divided and sequentially applied. Specifically, after the first driving signal is applied for a predetermined time, the second driving signal may be applied for a predetermined time.

The time for which the first driving signal is applied to the touch electrode TE may be varied as needed within _{one period (1/f 1w1} ) to which the first driving signal is applied, and the second driving signal may be applied to the touch electrode ( The time applied to TE) may be varied as needed within _{one period (1/f 2w1} ) in which the second driving signal is applied.

For example, the controller 230 may be configured to increase the sensing accuracy of the external object input sensed by the first driving signal and the sensing accuracy of the pen input sensed by the second driving signal, the first driving signal and the second driving signal. The time for which the signal is applied to the touch electrode TE may be set to be long. Meanwhile, in order to reduce power consumption by the first driving signal and the second driving signal, the control unit 230 may set a shorter time for which the first driving signal and the second driving signal are applied to the touch electrode TE. can

17 is a diagram illustrating that the first driving signal and the second driving signal are time-divided and applied in the sensing section. Referring to FIG. 17 , in the sensing section, the controller 230 performs a second operation in the case of a bidirectional communication type active pen (case 4), a unidirectional communication type active pen case (case 5), and an external object (case 6). The first driving signal and the second driving signal may be time-divided and applied to the touch panel TE.

When the touch input is a two-way communication type active pen or a unidirectional communication type active pen (cases 4 and 5), the controller 230 applies the first driving signal at the 1-2 standby frequency f _1w2 , The second driving signal may be time- _{divided into a 2-1 th} sensing frequency f 2s1 or a 2-2 th sensing frequency f 2s2 and applied. Accordingly, the first driving signal may be periodically applied to the touch panel TE to have a longer period than the second driving signal in a state where it does not overlap the second driving signal.

On the other hand, when the touch input is an external object (case 6), the controller 230 applies the first driving signal to the first sensing frequency f _1s and applies the second driving signal to the 2-2 standby frequency f _2w2 ) can be applied by time division. Accordingly, the first driving signal may be periodically applied to the touch panel TE to have a shorter period than the first driving signal in a state where it does not overlap the second driving signal.

Meanwhile, the time for which the first driving signal is applied to the touch electrode TE may be about 1 ms, and the time for which the second driving signal is applied to the touch electrode TE may be about 2 ms. However, the length of time during which the first driving signal and the second driving signal are applied is not limited thereto, and may be set to various lengths of time.

18 is a diagram illustrating a comparison table of current consumed by the touch driving device 200 of the present invention.

In the table, Modes 1 and 2 are input frequencies of the first driving signal and the second driving signal in the standby state W1 and the standby state W3 of the touch driving apparatus 200 according to an embodiment of the present invention; and a standby current flowing through the touch driving device 200 . Mode 3, as a comparative example, shows the input frequencies of the first and second driving signals and the standby current flowing through the touch driving device in the full sensing state.

Referring to the table, it can be seen that the standby current flowing through the touch driving device 200 in a state where there is no pen input is 0.63 mA, which is about 5% compared to the standby current in the full sensing state. It can be seen that the standby current flowing through the touch driving device 200 in the state of being detected at least once is 1.93 mA, which is about 13% compared to the standby current of the full sensing state.

That is, the touch driving apparatus 200 according to an embodiment of the present invention may reduce power consumption by differently setting the driving signal applied in the standby state according to whether the electronic pen is initially recognized. In addition, the touch driving apparatus 200 according to an embodiment of the present invention reduces power consumption by setting a period of applying a driving signal in a standby state longer than a period of applying a driving signal in a sensing state where a touch is input. can do it

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims (21)

a touch panel including a plurality of touch electrodes; a sensor circuit for applying a first driving signal and/or a second driving signal to the touch panel and receiving a sensing signal induced by the first driving signal and/or the second driving signal; a control unit for detecting a touch input from the sensing signal received by the sensor circuit; The control unit is control to apply the first driving signal to the touch panel when a pen input is never detected after the touch driving device boots; After the pen input is detected at least once after the touch driving device boots, the first driving signal and the second driving signal are applied to the touch panel; The first driving signal is a signal for detecting an input by an external object, and the second driving signal is a signal for detecting the pen input. According to claim 1, The control unit is When a touch input is detected from the sensing signal corresponding to the first driving signal, an uplink signal for detecting the electronic pen is applied to the touch panel, and when a downlink signal is received, the touch input is It is judged to be pen input, and applying the first driving signal and the second driving signal to the touch panel when the pen input is detected. According to claim 1, The control unit is When a touch input is detected from the sensing signal corresponding to the first driving signal, an uplink signal for detecting the electronic pen is applied to the touch panel, and when a downlink signal is not received, the touch input is determined not to be a pen input judge, and applying the first driving signal to the touch panel when a pen input is never detected after the touch driving device boots. According to claim 1, The touch input is The touch driving device, characterized in that the input by the external object or the pen input. 5. The method of claim 4, The control unit periodically applies the first driving signal, A period of applying the first driving signal when the input by the external object is not detected is longer than a period of applying the first driving signal when the input by the external object is detected . 5. The method of claim 4, The control unit periodically applies the second driving signal, A period of applying the second driving signal when the pen input is not detected is longer than a period of applying the second driving signal when the pen input is detected. 5. The method of claim 4, The control unit periodically applies the first driving signal and/or the second driving signal, A period of applying the second driving signal when the pen input is detected is shorter than a period of applying the first driving signal when the external object input is detected. 5. The method of claim 4, The control unit periodically applies the first driving signal and/or the second driving signal, A period of applying the first driving signal when the pen input is detected is longer than a period of applying the first driving signal when the touch input is not detected. 5. The method of claim 4, The control unit periodically applies the first driving signal and/or the second driving signal, A period of applying the second driving signal when the input by the external object is detected is longer than a period of applying the second driving signal when the touch input is not detected. According to claim 1, The first driving signal comprises a first sensing signal comprising a plurality of pulses for detecting a touch from an external object. According to claim 1, The second driving signal includes a second sensing signal including a plurality of pulses for detecting an uplink signal and a downlink signal received from the electronic pen. 12. The method of claim 11, A level of the uplink signal included in the second driving signal is greater than a level of the second sensing signal. 12. The method of claim 11, The uplink signal includes at least one of pilot data, tip selection data, and ring selection data, The downlink signal includes at least one of pen identification information, pen pressure, battery status, tip data, and ring data. 12. The method of claim 11, The control unit is When the downlink signal is received, comparing the sync of the received downlink signal with the second sensing signal, and determining whether the pen is bidirectional or unidirectional according to whether the sync matches. 15. The method of claim 14, The control unit is and determining whether the pen is bidirectional or unidirectional based on content of data included in the downlink signal. 15. The method of claim 14, The control unit is Touch driving, characterized in that a first period of applying the second driving signal when the syncs match is set shorter than a second period of applying the second driving signal when the syncs do not match. Device. According to claim 1, The control unit is and detecting a touch input from a sensing signal corresponding to the first driving signal and/or the second driving signal, and calculating the coordinates of the touch input on the touch panel. According to claim 1, The touch panel is a capacitive touch panel, The pen is an active electrostatic (AES) pen, characterized in that the touch driving device. The touch drive device of any one of claims 1 to 18; and at least one electronic pen for transmitting a downlink signal to the touch driving device; 20. The method of claim 19, The electronic pen is a pen tip in contact with or close to the touch panel of the touch driving device; a receiver configured to receive a second driving signal applied to the touch panel through the pen tip; and and a transmitter configured to transmit the downlink signal including pen information based on the received second driving signal. An electronic device comprising the touch driving device of any one of claims 1 to 18.

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