KR102180034B1 - Touch apparatus and touch detection method thereof - Google Patents

Abstract

The touch device according to an embodiment includes a plurality of first touch electrodes extending in a first direction and arranged in a second direction crossing the first direction, and a plurality of first touch electrodes extending in a second direction and arranged in a first direction. 2 A touch panel including a touch electrode, and a first driving signal for generating a resonance signal of the stylus pen in a first section are applied to the touch panel, and a plurality of first touch electrodes and a plurality of electrodes are applied in a second section after the first section. And a touch driver receiving sensing signals from all of the second touch electrodes of.

Description

Touch device and its touch detection method {TOUCH APPARATUS AND TOUCH DETECTION METHOD THEREOF}

The present disclosure relates to a touch device and a touch detection method thereof, and more particularly, to a touch device for detecting a touch by a stylus pen, and a touch detection method thereof.

Various terminals such as mobile phones, smart phones, tablet PCs, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), and navigation devices are equipped with touch sensors. do.

In such a terminal, the touch sensor may be located on a display panel that displays an image or may be located on a region of the terminal body. When the user interacts with the terminal by touching the touch sensor, the terminal can provide an intuitive user interface to the user.

Users can use a stylus pen for precise touch input. Such a stylus pen may transmit and receive signals to and from the touch sensor through an electrical and/or magnetic method.

The embodiments are to provide a touch device capable of acquiring a touch position within a short period of time and a touch detection method thereof.

The embodiments are to provide a touch device capable of improving a signal-to-noise ratio of an effective signal used for detecting touch coordinates and a method of detecting a touch thereof.

In order to achieve the above or other objects, the touch device according to an exemplary embodiment extends in a first direction, includes a plurality of first touch electrodes arranged in a second direction crossing the first direction, and extends in a second direction, A touch panel including a plurality of second touch electrodes arranged in a first direction, and a first driving signal for generating a resonance signal of a stylus pen in a first section is applied to the touch panel, and a second section after the first section And a touch driver receiving sensing signals from all of the plurality of first touch electrodes and the plurality of second touch electrodes.

The touch driver compares the first driving signal with the first driving signal in the second period, and transmits driving signals having a different ratio of the disable level period to the enable level period within one repeated period of the plurality of first touch electrodes and the plurality of second touches. It is applied to all of at least one type of touch electrode among the electrodes.

The touch driver receives a detection signal when a driving signal applied to at least one type of touch electrodes among the plurality of first touch electrodes and the plurality of second touch electrodes in the second period is in the disable level period.

The touch driver receives detection signals from all of the plurality of second touch electrodes when the driving signals applied to the plurality of first touch electrodes in the second section are at the disable level, and applies them to the plurality of second touch electrodes in the second section. When the driving signal is at the disable level, detection signals are received from all of the plurality of first touch electrodes.

The touch driver receives detection signals from all of the plurality of second touch electrodes when the driving signal is at the disable level during the second period in which the driving signal is applied only to the plurality of first touch electrodes within the second period, In the second period, when the driving signal is at the disable level during period 2-2 in which the driving signal is applied only to the plurality of second touch electrodes, detection signals are received from all of the plurality of second touch electrodes.

The touch driver receives detection signals from all of the plurality of first touch electrodes and the plurality of second touch electrodes when the driving signal applied to the plurality of first touch electrodes in the second period is at the disable level, and receives a plurality of detection signals in the second period. When the driving signal applied to the second touch electrode of is at the disable level, detection signals are received from all of the plurality of first touch electrodes and the plurality of second touch electrodes.

In the second period, when the driving signal is at the disable level during the 2-1 period in which the driving signal is applied only to the plurality of first touch electrodes, all of the plurality of first touch electrodes and the plurality of second touch electrodes In the second period, when the driving signal is at the disable level during the second period in which the driving signal is applied only to the plurality of second touch electrodes, the detection signal is received from the plurality of first touch electrodes and the plurality of second touch electrodes. 2 Receive sensing signals from all of the touch electrodes.

The touch driver alternately applies a driving signal of an enable level to all of the plurality of first touch electrodes and all of the plurality of second touch electrodes within the second section, and drives the enable level of all of the plurality of first touch electrodes. After the signal is applied, the period before the enable level driving signal is applied to all of the plurality of second touch electrodes and after the enable level driving signal is applied to all of the plurality of second touch electrodes, all of the plurality of first touch electrodes In a period before the enable level driving signal is applied, a detection signal is received from all of at least one type of touch electrodes among the plurality of first touch electrodes and the plurality of second touch electrodes.

The touch driver applies driving signals of the same phase to all of the plurality of first touch electrodes and all of the plurality of second touch electrodes within the second section, and when the driving signals are at the disable level, the plurality of first touch electrodes and the plurality of A sensing signal is received from all of at least one type of touch electrodes among the second touch electrodes of.

The driving signal applied to all of at least one type of touch electrode among the plurality of first touch electrodes and the plurality of second touch electrodes in the second period is in the disable level period for the enable level period within one repeated period. Rains a:2b+1, a:2b+2, a:2b+3, a:2b+4, a:(3b+1), a:2(b+3)+1, a:2(b+ 3) contains at least one of a:(2b+1), and a and b are integers.

The touch driver applies a first driving signal to all of at least one type of touch electrodes among the plurality of first touch electrodes and the plurality of second touch electrodes during the first period.

It further includes a controller that acquires touch coordinate information by using the detection signal received during the second period by the touch driver.

The controller determines the type of the touch object by using the detection signal received during the second period by the touch driver.

The touch driving unit includes a first driving unit connected to a plurality of first touch electrodes and a second driving unit connected to a plurality of second touch electrodes, and the first driving unit is a differential amplification connected to two first touch electrodes And an ADC unit that converts the differentially amplified signal into a digital signal.

The two first touch electrodes are spaced apart from each other with at least one first touch electrode therebetween.

A touch device according to another exemplary embodiment includes a plurality of first touch electrodes extending in a first direction and arranged in a second direction crossing the first direction, and a plurality of first touch electrodes extending in a second direction and arranged in the first direction. 2 A touch panel including a touch electrode, a first driving signal for generating a resonance signal of a stylus pen in a first section is applied to all of the plurality of first touch electrodes and the plurality of second touch electrodes, A second driving signal having a different ratio of the disable level period to the enable level period within one repeated period compared to the first driving signal in the second period is applied to all of the plurality of first touch electrodes and the plurality of second touch electrodes. And a touch driver receiving detection signals from both the plurality of first touch electrodes and the plurality of second touch electrodes when the second driving signal is at the disable level during the second period, and the detection signal received during the second period. And a control unit that acquires touch coordinate information by using and determines the type of the touch object.

One period of the second driving signal includes a period in which the enable level period and the disable level period are repeated at least a times, and a period in which the disable level period is maintained at least 2a times, and a is an integer.

In the touch detection method according to an embodiment, in a first section, a plurality of first touch electrodes extending in a first direction and arranged in a second direction crossing the first direction, extending in a second direction, and in a first direction Applying a first driving signal for generating a resonance signal of a stylus pen to a touch panel including a plurality of second touch electrodes arranged in a row, and in a second period following the first period, the plurality of first touch electrodes and And receiving sensing signals from all of the plurality of second touch electrodes, and obtaining touch coordinate information from the sensing signals.

In a second period following the first period, a driving signal having a different ratio of the disable level period to the enable level period within one repeated period is compared with the first driving signal. The method further includes applying to all of at least one type of touch electrode among the second touch electrodes.

The driving signal applied to all of at least one type of touch electrode among the plurality of first touch electrodes and the plurality of second touch electrodes in the second period is in the disable level period for the enable level period within one repeated period. Rains a:2b+1, a:2b+2, a:2b+3, a:2b+4, a:(3b+1), a:2(b+3)+1, a:2(b+ 3) contains at least one of a:(2b+1), and a and b are integers.

According to embodiments, a touch device and a method for detecting a touch thereof have an advantage in that touch coordinates according to two axes intersecting each other can be obtained in a short time.

According to embodiments, a touch device and a method of detecting a touch thereof have an advantage of securing a sufficient time for processing a touch signal.

1 is a schematic diagram of a touch device according to an exemplary embodiment.
2 is a diagram illustrating an example in which a stylus pen is touched on a touch device according to an exemplary embodiment.
3 is a diagram illustrating the touch device of FIG. 1 in more detail.
4 is a flowchart illustrating a touch detection method according to an exemplary embodiment.
5 and 6 are waveform diagrams illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 4.
7 is a waveform diagram illustrating a driving signal according to various aspects of an embodiment.
8 is a flowchart illustrating a touch detection method according to a first aspect.
9 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 8.
10 is a flowchart illustrating a touch detection method according to a second aspect.
11 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 10.
12 is a flowchart illustrating a touch detection method according to a third aspect.
13 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 12.
14 is a flowchart illustrating a touch detection method according to a fourth aspect.
15 is a waveform diagram showing a driving signal and a pen resonance signal according to the touch detection method of FIG. 14.
16 is a flowchart illustrating a touch detection method according to a fifth aspect.
17 and 18 are waveform diagrams illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 16.
20 is a waveform diagram illustrating a driving signal and a pen resonance signal according to a touch detection method according to an exemplary embodiment.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description have been omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, so the present invention is not necessarily limited to the illustrated bar. In the drawings, the thicknesses are enlarged to clearly express various layers and regions. And in the drawings, for convenience of description, the thickness of some layers and regions is exaggerated.

In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" or "on" another part, this includes not only "directly over" another part, but also a case where another part is in the middle. . Conversely, when one part is "directly above" another part, it means that there is no other part in the middle. In addition, to be "on" or "on" the reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "above" or "on" the direction opposite to the gravity. .

In addition, throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

Hereinafter, a touch device and a touch detection method thereof according to embodiments will be described with reference to necessary drawings.

1 is a diagram schematically illustrating a touch device according to an exemplary embodiment, and FIG. 2 is a diagram illustrating an example in which a stylus pen is touched on a touch device according to an exemplary embodiment.

Referring to FIG. 1, a touch device 10 according to an exemplary embodiment includes a touch panel 100, first and second driving units 110 and 120 driving the touch panel 100, and a control unit. controller, 130).

The touch panel 100 includes a plurality of first touch electrodes 111-1 to 111-n having a shape extending in a first direction and a plurality of second touch electrodes having a shape extending in a second direction crossing the first direction. And touch electrodes 121-1 to 121-m. In the touch panel 100, a plurality of first touch electrodes 111-1 to 111-n may be arranged along a second direction, and the plurality of second touch electrodes 121-1 to 121-m are It can be arranged along the first direction. In FIG. 1, the shape of the touch panel 100 is shown as a square, but is not limited thereto.

As shown in FIG. 2, the touch panel 100 further includes a substrate 105 and a window 103. A plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121-m may be positioned on the substrate 105. In addition, the window 103 may be positioned on the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. In FIG. 2, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121-m are shown to be located on the same layer, but are respectively located on different layers. It can be done and is not limited thereto.

The plurality of first touch electrodes 111-1 to 111-n are connected to the first driving unit 110, and the plurality of second touch electrodes 121-1 to 121-m are connected to the second driving unit 120. connected. In FIG. 1, the first driving unit 110 and the second driving unit 120 are separately illustrated, but may be implemented as a single module, unit, or chip, but is not limited thereto.

The first driver 110 may apply a driving signal to the plurality of first touch electrodes 111-1 to 111-n. Also, the first driver 110 may receive a detection signal from the plurality of first touch electrodes 111-1 to 111-n. Likewise, the second driver 120 may apply a driving signal to the plurality of second touch electrodes 121-1 to 121-m. In addition, the second driver 120 may receive a detection signal from the plurality of first touch electrodes 121-1 to 121 -m.

The driving signal may include a signal (eg, a sine wave, a square wave, etc.) having a frequency corresponding to the resonance frequency of the stylus pen 20. The resonant frequency of the stylus pen 20 depends on the design value of the resonant circuit part 23 of the stylus pen.

The touch device 10 may be used to detect a touch input (direct touch or proximity touch) by a touch object. As illustrated in FIG. 2, a touch input of a stylus pen 20 adjacent to the touch panel 100 may be sensed by the touch device 10.

The stylus pen 20 may include a conductive tip 21, a resonance circuit 23, a ground 25, and a body 27.

At least part of the conductive tip 21 is formed of a conductive material (eg, metal, conductive rubber, conductive fabric, conductive silicone, etc.), and may be electrically connected to the resonance circuit 23.

The resonant circuit 23 is an LC resonant circuit, and a plurality of first touch electrodes 111-1 to 111 -n from at least one of the first driving unit 110 and the second driving unit 120 through the conductive tip 21 And a driving signal applied to all of at least one type of electrode among the plurality of second touch electrodes 121-1 to 121-m.

The resonance signal generated by the resonance circuit 23 resonating with the driving signal may be output to the touch panel 100 through the conductive tip 21. A section in which a driving signal is applied to at least one of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m and a section thereafter At, a resonance signal due to resonance of the resonance circuit 23 may be transmitted to the conductive tip 21. The resonance circuit 23 is located in the body portion 27 and may be electrically connected to the ground portion 25.

The stylus pen 20 of this type generates a touch input by generating a resonance signal in response to a driving signal applied to at least one of the touch electrodes 111-1 to 111-n and 121-1 to 121-m. I can.

A capacitance Cx is formed by at least one of the touch electrodes 111-1 to 111-n and 121-1 to 121-m and the conductive tip 21 of the stylus pen 20. Through the capacitance Cx between at least one of the touch electrodes 111-1 to 111-n and 121-1 to 121-m and the conductive tip 21, a driving signal is transmitted to the stylus pen 20 , The resonance signal may be transmitted to the touch panel 100.

The touch device 10 is a touch object other than the stylus pen 20 using the method for generating the resonance signal described above (for example, a user's body part (finger, etc.), a passive or active method) The touch by the stylus pen) may be detected, but is not limited thereto.

For example, the touch device 10 detects a touch by a stylus pen that receives an electrical signal and outputs it as a magnetic field signal. For example, the touch device 10 may further include a digitizer. The magnetic field signal electromagnetic resonance (or electromagnetic induction) by the stylus pen is detected by the digitizer, so that a touch can be detected. Alternatively, the touch device 10 detects a touch by a stylus pen that receives a magnetic field signal and outputs it as a resonant magnetic field signal. For example, the touch device 10 may further include a coil for applying a current as a driving signal and a digitizer. The stylus pen resonates with the magnetic field signal generated by the current applied coil. The stylus pen may detect a touch by detecting an electromagnetic resonance (or electromagnetic induction) magnetic field signal by the digitizer.

The controller 130 controls driving of the touch device 10, and may output touch coordinate information in response to a result of sensing a touch of the touch device 10.

Next, the first and second driving units 110 and 120 of the touch device 10 will be described in detail with reference to FIG. 3.

3 is a diagram illustrating the touch device of FIG. 1 in more detail.

As shown, the first driving unit 110 includes a plurality of differential amplification units (or differential amplification units) 113-1 to 113-i, an ADC unit 115, and a signal processing unit (DSP, 117). . The second driving unit 120 includes a plurality of differential amplifying units 123-1 to 123-j, an ADC unit 125, and a signal processing unit DSP 127.

Input terminals of each of the differential amplifiers 113-1 to 113-i and 123-1 to 123-j are connected to two touch electrodes spaced apart from each other by at least one touch electrode. Each of the differential amplification units 113-1 to 113-i and 123-1 to 123-j may differentially amplify and output two sensing signals transmitted from the touch electrode. Each of the differential amplification units 113-1 to 113-i and 123-1 to 123-j receives and differentially amplifies the sensing signal from two touch electrodes, so even if the driving signal is simultaneously applied to a plurality of touch electrodes, It doesn't work.

Each of the differential amplifiers 113-1 to 113-i and 123-1 to 123-j may receive a sensing signal from two touch electrodes spaced apart from each other, not from two adjacent touch electrodes. For example, each of the differential amplifiers 113-1 to 113-i and 123-1 to 123-j receives sensing signals from two touch electrodes spaced apart from each other with one or more touch electrodes interposed therebetween. In FIG. 3, the differential amplifier 113-1 receives a sensing signal from the touch electrode 111-1 and the touch electrode 111-5. When the differential amplifier 113-1 receives a detection signal from two adjacent touch electrodes (for example, the touch electrode 111-1 and the touch electrode 111-2), the touch electrode 111-1 and Even though the sensing signals due to the touch in the region between the touch electrodes 111-2 are differentially amplified by the differential amplifier 113-1, their values are not sufficiently large. Therefore, when the differential amplifying unit 113-1 is connected to two adjacent touch electrodes, touch sensitivity is lowered. However, since the differential amplifier 113-1 receives the detection signal from the touch electrode 111-1 and the touch electrode 111-5, the detection signal by the touch electrode at the location where the touch is input is sufficiently large. It can be differentially amplified to have, and the touch sensitivity can be improved.

Each of the ADC units 115 and 125 converts the differentially amplified sensing signal into a digital signal. In addition, each of the signal processing units 117 and 127 processes a plurality of differential amplified signals converted into digital signals and transmits them to the control unit 130.

Next, a touch detection method according to an embodiment will be described with reference to FIG. 4.

4 is a flowchart illustrating a touch detection method according to an exemplary embodiment.

In the first period, the first driver 110 simultaneously applies a driving signal to all of the plurality of first touch electrodes 111-1 to 111-n (S10 ). The resonant circuit part 23 of the stylus pen 20 resonates with a driving signal, thereby generating a resonant signal and transmitted to the touch panel 100 through the conductive tip 21.

In the above description, in the first section, the first driver 110 applies a driving signal to all of the plurality of first touch electrodes 111-1 to 111-n at the same time, but in the first section, the second driver 120 ) Applies a driving signal to all of the plurality of second touch electrodes 121-1 to 121-m at the same time, or the first driving unit 110 and the second driving unit 120 simultaneously apply the plurality of first touch electrodes 111 A driving signal may be applied to all of -1 to 111-n), and a driving signal may be applied to all of the plurality of second touch electrodes 121-1 to 121-m. The first driving unit 110 and the second driving unit 120 transmit driving signals to all of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. When applied, the phases of the driving signals applied to the plurality of first touch electrodes 111-1 to 111-n and the driving signals applied to the plurality of second touch electrodes 121-1 to 121-m are the same. Is assumed, but is not limited thereto.

In a second section after the first section, the first driver 110 receives a detection signal transmitted from the plurality of first touch electrodes 111-1 to 111-n, and the second driver 120 2 A sensing signal transmitted from the touch electrodes 121-1 to 121-m is received (S120). The first driving unit 110 and the second driving unit 120 may process the received detection signal and transmit it to the control unit 130. The controller 130 may acquire touch coordinate information of a point where the touch of the stylus pen 20 occurs by using the transmitted detection signal.

This touch detection method will be described with reference to FIGS. 5 and 6.

5 and 6 are waveform diagrams illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 4.

As shown in FIG. 5, in the first period T1, the driving signal S_111 is applied to all of the plurality of first touch electrodes 111-1 to 111-n. The driving signal S_111 is a pulse signal having an enable level voltage VE and a disable level voltage VD, and having a frequency similar to the resonance frequency of the stylus pen 20. The stylus pen 20 outputs a signal that resonates with the driving signal S_111. In the first period T1, the magnitude of the pen resonance signal increases according to the time when the driving signal S_111 is applied. And after a certain period of time has elapsed, the magnitude of the pen resonance signal is saturated. In the first period T1, a driving signal is not applied to all of the plurality of second touch electrodes 121-1 to 121-m. In addition, in the first period T1, the reception of detection signals from the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m is not performed. Does not.

Thereafter, when the first section T1 ends, the first driver 110 stops applying the driving signal S_111. During the second period T2, the driving signals S_111 and S_121 are not applied to the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. .

In the second period T2, the first driving unit 110 and the second driving unit 120 are formed with a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121 -m) Can receive detection signals from everyone. The first driving unit 110 and the second driving unit 120 may receive a pen resonance signal in the second period T2 in which the driving signals S_111 and S121 are not applied as a detection signal. The controller 130 may determine a touch position on the touch panel 100 and a type of the touch object through the detection signal received in the second period T2. According to the touch device 10 according to an embodiment, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121-m in a second period T2 ) Since the sensing signal is received through both, there is an advantage in that it is possible to obtain touch coordinates along the two axes intersecting each other in a short time.

As shown in FIG. 6, in a first period T1, a driving signal S_111 is applied to all of the plurality of first touch electrodes 111-1 to 111-n, and the plurality of second touch electrodes 121 The driving signals S_121 are applied to all of -1 to 121-m). The driving signals S_111 and S_121 have an enable level voltage VE and a disable level voltage VD, and are pulse signals having a frequency similar to the resonance frequency of the stylus pen 20. In FIG. 6, it is described that the voltage VE of the enable level and the voltage VD of the disable level of the driving signals S_111 and S_121 are the same and in-phase signals, but the present invention is not limited thereto. In the first period T1, the magnitude of the pen resonance signal increases according to the time when the driving signals S_111 and S_121 are applied. And after a certain period of time has elapsed, the magnitude of the pen resonance signal is saturated. According to the embodiment of FIG. 6, the size of the pen resonance signal saturated in the first period T1 may be larger than the level of the pen resonance signal saturated in the first period T1 according to the embodiment of FIG. 5. In the first period T1, the reception of detection signals from the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m is not performed.

Thereafter, when the first period T1 ends, the first driving unit 110 stops applying the driving signal S_111, and the second driving unit 120 also stops applying the driving signal S_121. During the second period T2, the driving signals S_111 and S_121 are not applied to the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. .

In the second period T2, the first driving unit 110 and the second driving unit 120 are formed with a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121 -m) Can receive detection signals from everyone. The first driving unit 110 and the second driving unit 120 may receive a pen resonance signal in the second period T2 in which the driving signals S_111 and S121 are not applied as a detection signal. The controller 130 may determine a touch position on the touch panel 100 and a type of the touch object through the detection signal received in the second period T2. According to the touch device 10 according to an embodiment, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121-m in a second period T2 ) Since the sensing signal is received through both, there is an advantage in that it is possible to obtain touch coordinates along the two axes intersecting each other in a short time.

In addition, the same driving signals S_111 and S121 to all of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m in the first section T1 At the same time, there is an advantage in that the resonance signal level of the stylus pen 20 responding thereto is improved.

In the above description, the detection signal may be received at least once in the second period T2 by at least one of the first driving unit 110 and the second driving unit 120. In addition, the time point at which the detection signal is received may be at least one of the time points (signal sensing time points) shown in FIGS. 5 and 6, and in addition, a second section T2 not shown in FIGS. 5 and 6 It may include, but is not limited to, any time point within.

Next, referring to FIG. 7, driving signals S_111 and S121 that may be applied to the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. Explain the type of ).

7 is a waveform diagram illustrating a driving signal according to various aspects of an embodiment.

During the first period T1, an enable level is applied to all of at least one of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m A first driving signal in which the pulse of (VE) is repeated in a predetermined period is applied. During the first period T1, the resonance signal of the stylus pen 20 may quickly reach a predetermined voltage level (ie, may be saturated) by the first driving signal.

During the second period T2, a disable level is applied to at least one of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. A driving signal having a plurality of sections having different sections is applied.

For example, if the duty ratio of the first driving signal output in the first period T1 (the ratio of the disable level period to the enable level period within one repeated period P) is 1:1, The driving signal output in the second period T2 has a duty ratio of a:2b+1, a:2b+2, a:2b+3, a:2b+4, a:(3b+1), a:2( b+3)+1, a:2(b+3), a:(2b+1)... Etc. Here, a and b are integers. The period corresponding to one period P of the driving signal output in the second period T2 is a period in which the enable level period and the disable level period are repeated at least n times, and the disable level period is maintained at least 2n circuits. It may include a section to be. The enable level period corresponds to a period in which the driving signal has an enable level (VE), and the disable level period corresponds to a period in which the driving signal has a disable level (VE). The duty ratio of the driving signal is only an example, and may include all ratios for maintaining the resonance signal of the stylus pen 20 reaching a predetermined level at an effective level.

The resonance signal of the stylus pen 20 reaching a predetermined level by the first driving signal in the first period T1 may be maintained at the effective level by the driving signal in the second period T2. Here, the effective level means a level at which the controller 130 can detect the resonance signal of the stylus pen 20 as a touch signal.

The driving signal in the second period T2 may be a signal in which at least one pulse is periodically omitted from the first driving signal in the first period T1. As described above, since the driving signal in the second period T2 is output in a form in which at least one pulse is periodically omitted compared to the first driving signal in the first period T1, the first period T1 The pulse speeds of the first driving signal in and the driving signal in the second period T2 may be different from each other. That is, the driving signal in the second period T2 may have a lower pulse speed than the first driving signal in the first period T1. Here, the pulse rate may be the number of pulses output per unit time (eg, 1 second).

As the number of skipped pulses of the driving signal in the second period T2 decreases, energy transferred from the touch device 10 to the stylus pen 20 may increase. Accordingly, as the number of skipped pulses of the driving signal in the second period T2 decreases, the signal level of the pen resonance signal generated in the second period T2 increases. Also, as the number of skipped pulses of the driving signal in the second period T2 increases, energy consumed for outputting the driving signal may decrease. Accordingly, as the number of skipped pulses of the driving signal in the second period T2 increases, the energy consumed by the touch device 10 in the second period T2 may decrease.

Next, a touch detection method in the case of applying a driving signal in the second section T2 described in FIG. 7 will be described with reference to FIGS. 8 to 18. 8 and 18, the driving signal applied to the touch electrodes 111-1 to 111-n and 121-1 to 121-m during the second period T2 has a ratio of a non-skipped pulse to a skipped pulse. Explain assuming that it is 1:1.

For example, as shown in FIGS. 9, 11, 13, and 15, a driving signal applied to the plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes ( 121-1 to 121-m) can be expressed as a driving signal having a duty ratio of 1:3 in FIG. 7. Specifically, in the embodiments of FIGS. 9 and 11, driving signals are applied to the plurality of first touch electrodes 111-1 to 111-n during the 2-1 period: an enable level (VE) pulse, a skipped pulse, and After being applied in the order of an evil level (VE) pulse and a skipped pulse, a driving signal is applied to the plurality of second touch electrodes 121-1 to 121-m in an enable level (VE) pulse, a skipped pulse, and an enable level. It can be applied in the order of (VE) pulse and skipped pulse. In FIGS. 9 and 11, the enable level (VE) pulse and the skipped pulse are applied twice to one type of touch electrode, but as in the embodiments of FIGS. 13 and 15, the enable level (VE) pulse and the The skipped pulse may be applied once to one type of touch electrode, and the present invention is not limited to the number of times.

Or, as shown in FIGS. 17 and 18, a driving signal applied to the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m are applied. Each of the resulting driving signals may be driving signals having a duty ratio of 1:3 in FIG. 7.

8 is a flowchart illustrating a touch detection method according to a first aspect, and FIG. 9 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 8.

Referring to FIG. 8, during the second period 2-1 in the second period T2, the first driver 110 simultaneously transmits a second driving signal to all of the plurality of first touch electrodes 111-1 to 111-n. After applying, the second driver 120 receives (S210) detection signals from all of the plurality of second touch electrodes 121-1 to 121-m according to the level of the driving signal. The resonance signal of the stylus pen 20 may be maintained at an effective level by the driving signal S_111 in the second period 2-1 in the second period T2.

As shown in FIG. 9, during the 2-1 period, the second driving signal S_111 may be applied only to all of the plurality of first touch electrodes 111-1 to 111-n. During the 2-1 period, a detection signal may be received from all of the plurality of second touch electrodes 121-1 to 121-m during a period in which the pulse of the driving signal S_111 is skipped. That is, while the driving signals S_111 and S_121 applied to the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m are at the disable level. , The second driver 120 may receive a detection signal from all of the plurality of second touch electrodes 121-1 to 121-m.

Referring to FIG. 8 again, during the second period 2-2 in the second period T2, the second driving unit 120 transmits a third driving signal to all of the plurality of second touch electrodes 121-1 to 121-m. S_121) is simultaneously applied, and the first driver 110 receives (S220) detection signals from all of the plurality of first touch electrodes 111-1 to 111-n. The resonance signal of the stylus pen 20 may be maintained at an effective level by the third driving signal S_121 in the second period 2-2 in the second period T2.

As illustrated in FIG. 9, during the 2-2 period, the third driving signal S_121 may be applied only to all of the plurality of second touch electrodes 121-1 to 121 -m. During period 2-2, detection signals may be received from all of the plurality of first touch electrodes 111-1 to 111-n during a period in which the pulse of the third driving signal S_121 is skipped.

Sections 2-1 and 2-2 may be alternately arranged within the second section T2. For example, when section 2-1 ends, section 2-2 starts, and when section 2-2 ends, section 2-1 starts.

According to the touch device 10 and the touch detection method according to the first aspect, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 in a second period T2 To 121-m), since the sensing signal is received through all of them, there is an advantage in that touch coordinates according to two axes intersecting each other can be obtained in a short time.

10 is a flow chart illustrating a touch detection method according to a second aspect, and FIG. 11 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 10.

Referring to FIG. 10, during period 2-1 in the second period T2, the first driver 110 transmits a second driving signal S_111 to all of the plurality of first touch electrodes 111-1 to 111-n. ) Is applied at the same time, and the first driving unit 110 and the second driving unit 120 have a plurality of first touch electrodes 111-1 to 111-n and a plurality of 2 A sensing signal is received from all of the touch electrodes 121-1 to 121-m (S211). The resonance signal of the stylus pen 20 may be maintained at an effective level by the second driving signal S_111 in the second period 2-1 in the second period T2.

As shown in FIG. 11, during the 2-1 period, the second driving signal S_111 may be applied only to all of the plurality of first touch electrodes 111-1 to 111-n. During the period 2-1, the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121- are skipped during the period in which the pulse of the second driving signal S_111 is skipped. m) Sensing signals can be received from both at the same time. That is, while the driving signals S_111 and S_121 applied to the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m are at the disable level. , The first and second driving units 110 and 120 simultaneously receive detection signals from all of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m. Can receive.

Referring back to FIG. 10, during the second period 2-2 in the second period T2, the second driving unit 120 transmits a third driving signal to all of the plurality of second touch electrodes 121-1 to 121-m. S_121) is applied at the same time, and the first driving unit 110 and the second driving unit 120 have a plurality of first touch electrodes 111-1 to 111-n and a plurality of touch electrodes according to the level of the third driving signal S_121. A sensing signal is simultaneously received from all of the second touch electrodes 121-1 to 121-m (S221). The resonance signal of the stylus pen 20 may be maintained at an effective level by the driving signal S_121 in the second period 2-2 in the second period T2.

As shown in FIG. 11, during the 2-2 period, the third driving signal S_121 may be applied only to all of the plurality of second touch electrodes 121-1 to 121 -m. During period 2-2, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121-m during a period in which the pulse of the driving signal S_121 is skipped Sensing signals can be received from all at the same time.

Sections 2-1 and 2-2 may be alternately arranged within the second section T2. For example, when section 2-1 ends, section 2-2 starts, and when section 2-2 ends, section 2-1 starts.

According to the touch device 10 and the touch detection method according to the second aspect, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 in a second period T2 To 121-m), since the sensing signals are simultaneously received, there is an advantage in that touch coordinates according to two axes intersecting each other can be obtained in a short time.

12 is a flowchart illustrating a touch detection method according to a third aspect, and FIG. 13 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 12.

Referring to FIG. 12, during the second period T2, the first driver 110 applies a second driving signal S_111 to all of the plurality of first touch electrodes 111-1 to 111-n, and 2 The driver 120 applies the third driving signal S_121 to all of the plurality of second touch electrodes 121-1 to 121-m (S212 ). The resonance signal of the stylus pen 20 may be maintained at an effective level by the driving signal S_111 and the third driving signal S_121 in the second period T2.

As shown in FIG. 13, during the second period T2, a second driving signal S_111 is applied to all of the plurality of first touch electrodes 111-1 to 111-n, and the plurality of second touch electrodes The third driving signal S_121 may be applied to all of (121-1 to 121-m). Pulses of the enable level VE are alternately applied to all of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m.

During the second period T2, during the period in which the pulse of the second driving signal S_111 is skipped, the second driver 120 receives detection signals from all of the plurality of second touch electrodes 121-1 to 121-m. And, during the period in which the pulse of the third driving signal S_121 is skipped, the first driving unit 110 receives (S222) detection signals from all of the plurality of first touch electrodes 111-1 to 111-n. That is, the second driving signal applied to the plurality of first touch electrodes 111-1 to 111-n is at the disable level, and the third driving signal applied to the plurality of second touch electrodes 121-1 to 121-m While the driving signal is at the disable level, the second driver 120 may receive a detection signal from all of the plurality of second touch electrodes 121-1 to 121-m.

After the second driving signal S_111 of the enable level VE is applied to all of the plurality of first touch electrodes 111-1 to 111-n, the plurality of second touch electrodes 121-1 to 121-m The period before the third driving signal S_121 of the enable level VE is applied to all and the third driving of the enable level VE to all of the plurality of second touch electrodes 121-1 to 121-m After the signal S_121 is applied, in the period before the second driving signal S_111 of the enable level VE is applied to all of the plurality of first touch electrodes 111-1 to 111-n, the plurality of first The sensing signal may be received from all of the touch electrodes 111-1 to 111-n or all of the plurality of second touch electrodes 121-1 to 121-m.

According to the touch device 10 and the touch detection method according to the third aspect, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 in a second period T2 To 121-m), since the sensing signal is received through all of them, there is an advantage in that touch coordinates according to two axes intersecting each other can be obtained in a short time.

14 is a flowchart illustrating a touch detection method according to a fourth aspect, and FIG. 15 is a waveform diagram illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 14.

Referring to FIG. 14, during a second period T2, the first driver 110 applies a second driving signal S_111 to all of the plurality of first touch electrodes 111-1 to 111-n, and 2 The driver 120 applies the third driving signal S_121 to all of the plurality of second touch electrodes 121-1 to 121-m (S213). The resonance signal of the stylus pen 20 may be maintained at an effective level by the driving signal S_111 and the third driving signal S_121 in the second period T2.

As shown in FIG. 15, during the second period T2, a second driving signal S_111 is applied to all of the plurality of first touch electrodes 111-1 to 111-n, and the plurality of second touch electrodes The third driving signal S_121 may be applied to all of (121-1 to 121-m). Pulses of the enable level VE are alternately applied to all of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m.

During the second period T2, in a period in which the pulse of the second driving signal S_111 is skipped, the first and second driving units 110 and 120 may include the plurality of first touch electrodes 111-1 to 111-n and During a period in which detection signals are simultaneously received from all of the plurality of second touch electrodes 121-1 to 121-m, and the pulse of the third driving signal S_121 is skipped, the first and second driving units 110 and 120 A sensing signal is simultaneously received from all of the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m (S223). That is, the second driving signal applied to the plurality of first touch electrodes 111-1 to 111-n is at the disable level, and the third driving signal applied to the plurality of second touch electrodes 121-1 to 121-m While the driving signal is at the disable level, the first and second driving units 110 and 120 are configured with a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121- m) Can receive detection signals from all at the same time.

After the second driving signal S_111 of the enable level VE is applied to all of the plurality of first touch electrodes 111-1 to 111-n, the plurality of second touch electrodes 121-1 to 121-m The period before the third driving signal S_121 of the enable level VE is applied to all and the third driving of the enable level VE to all of the plurality of second touch electrodes 121-1 to 121-m After the signal S_121 is applied, in the period before the second driving signal S_111 of the enable level VE is applied to all of the plurality of first touch electrodes 111-1 to 111-n, the plurality of first The sensing signal may be received from both the touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m.

According to the touch device 10 and the touch detection method according to the fourth aspect, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 in a second period T2 To 121-m), since the sensing signal is received through all of them, there is an advantage in that touch coordinates according to two axes intersecting each other can be obtained in a short time.

16 is a flowchart illustrating a touch detection method according to a fifth aspect, and FIGS. 17 and 18 are waveform diagrams illustrating a driving signal and a pen resonance signal according to the touch detection method of FIG. 16.

Referring to FIG. 16, during the second period T2, the first driver 110 applies a second driving signal S_111 to all of the plurality of first touch electrodes 111-1 to 111-n, At the same time, the second driving unit 120 applies the third driving signal S_121 to all of the plurality of second touch electrodes 121-1 to 121-m (S214). The resonance signal of the stylus pen 20 may be maintained at an effective level by the driving signal S_111 and the third driving signal S_121 in the second period T2.

17 and 18, during the second period T2, a second driving signal S_111 is applied to all of the plurality of first touch electrodes 111-1 to 111-n, and 2 A third driving signal S_121 may be applied to all of the touch electrodes 121-1 to 121-m. The second driving signal S_111 and the third driving signal S_121 may be signals in phase. When the second driving signal S_111 of the enable level VE is applied to all of the plurality of first touch electrodes 111-1 to 111-n, the plurality of second touch electrodes 121-1 to 121-m ) Are applied to all of the third driving signals S_121 of the enable level VE.

Referring back to FIG. 16, during the second period T2, the second driving unit 120 may be configured to perform a second plurality of periods in which the pulses of the second and third driving signals S_111 and S_121 are skipped. After receiving detection signals from all of the touch electrodes 121-1 to 121-m, the first driving unit 110 in a second plurality of periods in which the pulses of the second and third driving signals S_111 and S_121 are skipped. And at least one of the second driver 120 is at least one type of touch electrodes from among the plurality of first touch electrodes 111-1 to 111-n and the plurality of second touch electrodes 121-1 to 121-m A detection signal is received from all (S224).

For example, as shown in FIG. 17, the second driving signal applied to the plurality of first touch electrodes 111-1 to 111-n is at the disable level, and the plurality of second touch electrodes 121-1 While the third driving signal applied to (121-m) is at the disable level, the second driver 120 may receive detection signals from all of the plurality of second touch electrodes 121-1 to 121-m. . Then, the second driving signal applied to the plurality of first touch electrodes 111-1 to 111-n is at the disable level, and the second driving signal applied to the plurality of second touch electrodes 121-1 to 121-m is 3 While the driving signal is at the disable level, the first driver 110 may receive detection signals from all of the plurality of first touch electrodes 111-1 to 111-n.

For another example, as shown in FIG. 18, the second driving signal applied to the plurality of first touch electrodes 111-1 to 111-n is at the disable level, and the plurality of second touch electrodes 121- 1 to 121-m) while the third driving signal is at the disable level, the first and second driving units 110 and 120 may be configured to include a plurality of first touch electrodes 111-1 to 111-n and a plurality of The sensing signals may be simultaneously received from all of the second touch electrodes 121-1 to 121-m.

According to the touch device 10 and the touch detection method according to the fifth aspect, a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 in a second period T2 To 121-m), since the sensing signal is received through all of them, there is an advantage in that touch coordinates according to two axes intersecting each other can be obtained in a short time.

20 is a waveform diagram illustrating a driving signal and a pen resonance signal according to a touch detection method according to an exemplary embodiment.

Referring to FIG. 20, during a second period T2, a second driving signal S_111 is applied to all of the plurality of first touch electrodes 111-1 to 111-n, and the plurality of second touch electrodes 121 The third driving signal S_121 may be applied to all of -1 to 121-m). The second driving signal S_111 and the third driving signal S_121 may be signals in phase.

In the period corresponding to one period P of the second driving signal S_111 and the third driving signal S_121, the enable level period and the disable level period are at least n times (n=3 in FIG. Not) and a period in which the disable level period is maintained at least 2n times.

A second driving signal applied to the plurality of first touch electrodes 111-1 to 111-n is at a disable level, and a third driving signal applied to the plurality of second touch electrodes 121-1 to 121-m While is at the disable level, the first and second driving units 110 and 120 are configured to include a plurality of first touch electrodes 111-1 to 111-n and a plurality of second touch electrodes 121-1 to 121-m. It can receive detection signals from all at the same time.

In the description of FIGS. 8 to 19, the detection signal reception may be performed at least once in the second period T2 by at least one of the first driving unit 110 and the second driving unit 120. In addition, the time point at which the detection signal is received may be at least one of the time points (signal sensing time points) shown in Figs. 9, 11, 13, 15, 17, 18, and 19, respectively. An arbitrary viewpoint in the second section T2 that is not shown in FIGS. 9, 11, 13, 15, 17, 18, and 19 may be included, but is not limited thereto. For example, in FIG. 19, a time point when a detection signal is received by the first driver 110 and the second driver 120 may be one point immediately before the end of one period P.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (20)

A plurality of first touch electrodes extending in a first direction and arranged in a second direction crossing the first direction, and a plurality of second touch electrodes extending in the second direction and arranged in the first direction Touch panel, and
A first driving signal for generating a resonance signal of a stylus pen is applied to the touch panel in a first section, and both the plurality of first touch electrodes and the plurality of second touch electrodes are applied in a second section after the first section. Touch driver receiving a detection signal from
Including,
The touch driver compares the first driving signal with the first driving signal in the second period, and transmits a driving signal having a different ratio of the disable level period to the enable level period within one repeated period to the plurality of first touch electrodes and the Applied to all of at least one type of touch electrode among a plurality of second touch electrodes,
Touch device. delete The method of claim 1,
The touch driver receives the detection signal when a driving signal applied to at least one type of touch electrodes among the plurality of first touch electrodes and the plurality of second touch electrodes in the second period is a disable level period. ,
Touch device. The method of claim 1,
The touch driver receives detection signals from all of the plurality of second touch electrodes when driving signals applied to the plurality of first touch electrodes are at a disable level in the second period, and the plurality of Receiving detection signals from all of the plurality of first touch electrodes when the driving signal applied to the second touch electrode is at a disable level,
Touch device. The method of claim 4,
The touch driver detects from all of the plurality of second touch electrodes when the driving signal is at a disable level during a period 2-1 in which a driving signal is applied only to the plurality of first touch electrodes within the second period. When a signal is received and the driving signal is at a disable level during a period 2-2 in which a driving signal is applied only to the plurality of second touch electrodes within the second period, all of the plurality of second touch electrodes Receiving a detection signal,
Touch device. The method of claim 1,
The touch driver receives detection signals from both the plurality of first touch electrodes and the plurality of second touch electrodes when a driving signal applied to the plurality of first touch electrodes in the second section is at a disable level, Receiving detection signals from both the plurality of first touch electrodes and the plurality of second touch electrodes when a driving signal applied to the plurality of second touch electrodes is at a disable level in the second period,
Touch device. The method of claim 6,
When the driving signal is at a disable level during a period 2-1 in which a driving signal is applied only to the plurality of first touch electrodes within the second period, the plurality of first touch electrodes and the plurality of touch electrodes When a detection signal is received from all of the second touch electrodes of and the driving signal is at a disable level during a period 2-2 in which a driving signal is applied only to the plurality of second touch electrodes within the second period, the Receiving detection signals from all of the plurality of first touch electrodes and the plurality of second touch electrodes,
Touch device. The method of claim 1,
The touch driver alternately applies driving signals of an enable level to all of the plurality of first touch electrodes and all of the plurality of second touch electrodes within the second section, and to all of the plurality of first touch electrodes. After the enable level driving signal is applied, a period before the enable level driving signal is applied to all of the plurality of second touch electrodes, and after the enable level driving signal is applied to all of the plurality of second touch electrodes In a period before the driving signal of the enable level is applied to all of the plurality of first touch electrodes, a detection signal is received from all of at least one type of touch electrode among the plurality of first touch electrodes and the plurality of second touch electrodes. Receiving,
Touch device. The method of claim 1,
The touch driver applies driving signals of the same phase to all of the plurality of first touch electrodes and all of the plurality of second touch electrodes within the second period, and when the driving signals are at a disable level, the plurality of Receiving sensing signals from all of at least one type of touch electrode among the first touch electrode and the plurality of second touch electrodes,
Touch device. The method of claim 1,
In the second period, a driving signal applied to all of at least one type of touch electrode among the plurality of first touch electrodes and the plurality of second touch electrodes is disabled for the enable level period within one repeated period. The ratio of the level section is a:2b+1, a:2b+2, a:2b+3, a:2b+4, a:(3b+1), a:2(b+3)+1, a:2 (b+3) contains at least one of a:(2b+1), and a and b are integers,
Touch device. The method of claim 1,
The touch driver applies the first driving signal to all of at least one type of touch electrodes among the plurality of first touch electrodes and the plurality of second touch electrodes in the first section,
Touch device. The method of claim 1,
The touch device further comprises a control unit for acquiring touch coordinate information using a detection signal received during the second period by the touch driver. The method of claim 12,
The control unit determines the type of the touch object by using the detection signal received during the second period by the touch driver,
Touch device. The method of claim 1,
The touch driver includes a first driver connected to the plurality of first touch electrodes and a second driver connected to the plurality of second touch electrodes,
The first driving unit includes a differential amplifying unit connected to the two first touch electrodes, and an ADC unit for converting the differentially amplified signal into a digital signal,
Touch device. The method of claim 14,
The two first touch electrodes are spaced apart from each other with at least one first touch electrode therebetween,
Touch device. A plurality of first touch electrodes extending in a first direction and arranged in a second direction crossing the first direction, and a plurality of second touch electrodes extending in the second direction and arranged in the first direction Touch panel made,
In a first section, a first driving signal for generating a resonance signal of the stylus pen is applied to all of the plurality of first touch electrodes and the plurality of second touch electrodes, and the first driving signal is applied to a second section after the first section. A second driving signal having a different ratio of the disable level period to the enable level period within one repeated period compared to the driving signal is applied to all of the plurality of first touch electrodes and the plurality of second touch electrodes, A touch driver configured to receive detection signals from both the plurality of first touch electrodes and the plurality of second touch electrodes when the second driving signal is at a disable level during the second period, and
A control unit that acquires touch coordinate information using a detection signal received during the second section and determines the type of a touch object
Touch device comprising a. The method of claim 16,
One period of the second driving signal includes a period in which the enable level period and the disable level period are repeated at least a times, and a period in which the disable level period is maintained at least 2a times, and a is an integer,
Touch device. In the first section, a plurality of first touch electrodes extending in a first direction and arranged in a second direction crossing the first direction, and a plurality of first touch electrodes extending in the second direction and arranged in the first direction 2 Applying a first driving signal for generating a resonance signal of a stylus pen to a touch panel including a touch electrode,
Receiving a detection signal from both the plurality of first touch electrodes and the plurality of second touch electrodes in a second period following the first period,
In a second section after the first section, a drive signal having a different ratio of the disable level section to the enable level section within one repeated period is compared with the first drive signal, and the plurality of first touch electrodes And applying to all of at least one type of touch electrode among the plurality of second touch electrodes, and
Acquiring touch coordinate information from the detection signal
Touch detection method comprising a. delete The method of claim 18,
In the second period, a driving signal applied to all of at least one type of touch electrode among the plurality of first touch electrodes and the plurality of second touch electrodes is disabled for the enable level period within one repeated period. The ratio of the level section is a:2b+1, a:2b+2, a:2b+3, a:2b+4, a:(3b+1), a:2(b+3)+1, a:2 (b+3) contains at least one of a:(2b+1), and a and b are integers,
Touch detection method.

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