KR102104275B1 - Touch system using a stylus pen and method for detecting touch thereof - Google Patents

Abstract

Regarding a touch system using a stylus pen, the stylus pen of the touch system according to an embodiment includes a driving signal receiver configured to receive a touch driving signal from a touch panel, and a higher value than a preset value when a touch driving signal is received. It includes a stylus signal generation unit for generating a stylus signal having a frequency and a signal transmission unit for transmitting a stylus signal to a touch panel, and the touch panel includes a stylus signal according to a touch operation of the stylus pen, and a touch detection signal according to a touch operation by a hand And Non-touch (Non-touch) detects at least one signal of the non-touch signal, at least one of the detected signal machine learning, based on the results of the machine learning touch operation of the stylus pen, touch operation by hand And non-touch.

Description

Touch system using stylus pen and touch detection method using the same {TOUCH SYSTEM USING A STYLUS PEN AND METHOD FOR DETECTING TOUCH THEREOF}

The present invention relates to a touch system and a touch detection method using the same, and more particularly, to a technique for determining a touch operation based on a machine learning result.

Recently, as mutual capacitive touch screens are applied to many smart mobile devices, users' demands for a stylus pen that supports writing and drawing work beyond a simple touch environment are increasing.

In order to meet these needs, various stylus methods such as passive stylus, active stylus, Wacom EMR stylus, and N-trig stylus have appeared, but the aforementioned stylus methods have some problems in terms of touch driving and efficiency. Is occurring.

Specifically, the passive stylus method is inexpensive, but it is impossible to distinguish the stylus pen when the user's hand is placed on a smart device. Therefore, when using a stylus pen with the palm on the screen, palm rejection that does not recognize the palm is also impossible, and the tip of the stylus pen must be very thick.

In addition, the active stylus method can be used as a more sophisticated tip than the passive stylus method, but like the passive stylus method, there is a problem that palm rejection is difficult.

In addition, the Wacom EMR stylus method works with a sophisticated tip, and at the same time palm rejection is also possible, but there is a problem in that it is disadvantageous in terms of process because an additional EMR panel must be added to the mutual capacitance touch screen.

Lastly, the N-trig stylus method allows the application of sophisticated tips and palm rejection using the existing touch panel. However, there is a problem in that it is not efficient in terms of driving because the operation mode must be changed with and without a stylus pen.

Korean Registered Patent No. 10-2016-0037351, "Touch sensor circuit and touch sensing display device using same and driving method thereof" U.S. Patent No. 8,481,872, "DIGITIZER, STYLUS AND METHOD OF SYNCHRONIZATION THEREWITH"

An object of the present invention is to provide a touch system capable of improving the efficiency of touch driving while minimizing cost by classifying the touch operation of the hand and the stylus pen without distinguishing the operation mode while using the existing touch panel as it is.

In addition, the present invention is to provide a stylus pen that operates without synchronization with a touch driving signal, and aims to provide a stable driving system.

In addition, an object of the present invention is to provide a touch system capable of improving the accuracy of classification of touch operations through machine learning.

The stylus pen of the touch system according to an embodiment of the present invention generates a driving signal receiving unit that receives a touch driving signal from a touch panel and a stylus signal having a higher frequency than a preset value than the touch driving signal when the touch driving signal is received. It includes a stylus signal generation unit and a signal transmission unit for transmitting the stylus signal to the touch panel, and the touch panel includes a stylus signal according to a touch operation of the stylus pen, a touch detection signal according to a hand touch operation, and a non-touch (Non-touch) ), Detects at least one of the non-touch signals, performs machine learning on the detected at least one signal, and can determine the touch action, touch action, and non-touch of the stylus pen based on the result of the machine learning. have.

According to one side, the driving signal receiving unit may receive a touch driving signal when a touch operation occurs between the tip of the stylus pen and the touch panel.

According to one side, the signal transmission unit may transmit the stylus signal while the touch driving signal is detected without a separate synchronization process from the touch driving signal.

According to one side, the touch panel includes an analog to digital converter (ADC), samples at least one signal sensed through the ADC, and can machine-learn at least one sampled signal. .

According to one side, the touch panel collects sampling results of each of the stylus signal, the touch detection signal, and the non-touch signal, performs an initialization process of extracting a support vector using the collected results, and samples through the support vector The determined at least one signal may be determined as one of a stylus pen touch action, a hand touch action, and non-touch.

The touch panel of the touch system according to an embodiment of the present invention generates a touch driving signal, receives a driving signal generating unit and a touch driving signal that sequentially transmits a touch driving signal to each of a plurality of driving lines (Tx lines), , Detects at least one of a stylus signal according to a touch operation of a stylus pen, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to a non-touch, and detects at least one detected signal Equipped with a sensing unit for transmitting to a sensing line corresponding to a touch point among a plurality of sensing lines (Rx line) and an ADC (Analog to Digital Converter), sampling at least one signal detected through the ADC (sampling) ) To learn the sampling unit and the sampled at least one signal, and perform a touch action of the stylus pen, a touch action by the hand, and A touch determination unit for determining non-touch, the stylus pen receives a touch driving signal from the sensing unit when a touch operation occurs between the touch panel and the tip of the stylus pen, and is higher than a preset value than the touch driving signal. The stylus signal having a frequency may be transmitted to the detection unit.

According to one side, the stylus pen may transmit the stylus signal to the sensing unit while the touch driving signal is detected without a separate synchronization process from the touch driving signal.

According to one side, the touch determination unit performs an initialization process of collecting the sampling results of each of the stylus signal, the touch detection signal, and the non-touch signal from the sampling unit, and extracting a support vector using the collected result, and performing a support process. The at least one signal sampled through may be determined as one of a stylus pen touch action, a hand touch action, and a non-touch.

A touch detection method of a touch panel according to an exemplary embodiment of the present invention includes generating a touch driving signal from a driving signal generating unit, sequentially transmitting a touch driving signal to each of a plurality of driving lines (Tx lines), and a sensing unit Receives a touch driving signal, and detects at least one of a stylus signal according to a touch operation of a stylus pen, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to a non-touch, Transmitting at least one sensed signal to a sensing line corresponding to a touch point among a plurality of sensing lines (Rx lines), and at least one sensed through an analog to digital converter (ADC) in a sampling unit Step of sampling the signal and machine learning at least one signal sampled by the touch determination unit, and according to the result of the machine learning, Determining a touch operation, a touch operation by a hand, and a non-touch, and the transmitting to the detection line includes a touch driving signal from the sensing unit in the stylus pen when the tip of the stylus pen contacts the touch panel. The method may further include receiving and transmitting a stylus signal having a higher frequency than a preset value than the touch driving signal to the sensing unit.

According to one side, the step of transmitting the stylus signal to the sensing unit may transmit the stylus signal to the sensing unit while the touch driving signal is detected without synchronization with the touch driving signal from the stylus pen.

According to one side, the determining step includes collecting a sampling result of each of the stylus signal, the touch detection signal, and the non-touch signal from the sampling unit by the touch determining unit, and extracting a support vector using the collected result And determining, by the touch determination unit, at least one signal sampled through the support vector as one of a stylus pen touch operation, a hand touch operation, and non-touch.

According to one embodiment, by using the existing touch panel as it is, by distinguishing the touch operation of the hand and the stylus pen without distinguishing the operation mode, it is possible to improve the efficiency of the touch driving while minimizing the cost.

Further, according to an embodiment, by providing a stylus pen that operates without synchronization with a touch driving signal, stability of touch driving may be improved.

In addition, according to one embodiment, it is possible to improve the accuracy of the classification of the touch action through machine learning.

1 is a view showing a touch system according to an embodiment of the present invention.
2 is a view for explaining a stylus pen of a touch system according to an embodiment of the present invention.
3 is a view for explaining a touch panel of a touch system according to an embodiment of the present invention.
4 is a view for explaining an embodiment of providing a stylus signal in the stylus pen according to an embodiment of the present invention.
5 is a view for explaining the operation of the sampling unit provided on the touch panel according to an embodiment of the present invention.
6 is a view for explaining a touch detection method of a touch panel according to an embodiment of the present invention.
7 is a view for explaining an embodiment of a method for determining a touch operation of a touch panel according to an embodiment of the present invention.

Hereinafter, various embodiments of this document are described with reference to the accompanying drawings.

It should be understood that the embodiments and terms used therein are not intended to limit the technology described in this document to specific embodiments, and include various modifications, equivalents, and / or substitutes of the embodiments.

In the following description of various embodiments, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the invention, the detailed description will be omitted.

In addition, terms to be described later are terms defined in consideration of functions in various embodiments, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification.

In connection with the description of the drawings, similar reference numerals may be used for similar components.

Singular expressions may include plural expressions unless the context clearly indicates otherwise.

In this document, expressions such as “A or B” or “at least one of A and / or B” may include all possible combinations of items listed together.

Expressions such as "first," "second," "first," or "second," can modify the components, regardless of order or importance, to distinguish one component from another component It is used but does not limit the components.

When one (eg, first) component is said to be “connected (functionally or communicatively)” or “connected” to another (eg, second) component, a component is referred to as the other component It may be directly connected to the element, or may be connected through another component (eg, third component).

In this specification, "configured to (or configured) (configured to)", depending on the situation, for example, in hardware or software, "suitable for," "with the ability to", "has been modified to It can be used interchangeably with "made to do," "can do," or "designed to do."

In some situations, the expression "a device configured to" may mean that the device "can" with other devices or parts.

For example, the phrase “processors configured (or set) to perform A, B, and C” means by executing a dedicated processor (eg, an embedded processor) to perform the operation, or one or more software programs stored in the memory device. , It may mean a general-purpose processor (eg, CPU or application processor) capable of performing the corresponding operations.

In addition, the term 'or' refers to the inclusive 'inclusive or' rather than the exclusive 'exclusive or'.

That is, unless stated otherwise or unclear from the context, the expression 'x uses a or b' means any of the natural inclusive permutations.

In the above-described specific embodiments, components included in the present invention are expressed in singular or plural according to the specific embodiments presented.

However, the singular or plural expressions are appropriately selected for the situation presented for convenience of explanation, and the above-described embodiments are not limited to the singular or plural components, and even the components expressed in plural are composed of the singular or , Even a component represented by a singular number may be composed of a plurality.

On the other hand, the description of the invention has been described with respect to specific embodiments, various modifications are possible within the limits that do not depart from the scope of the technical spirit implied by various embodiments.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims described below but also by the claims and equivalents.

1 is a view showing a touch system according to an embodiment of the present invention.

Referring to FIG. 1, the touch system 100 according to an embodiment may improve stability and efficiency of touch driving while minimizing cost, and improve accuracy of classification of touch operations.

To this end, the touch system 100 may include a touch panel 110 and a stylus pen 120.

The touch panel 110 according to an embodiment may include at least one of a stylus signal according to a touch operation of the stylus pen 120, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to non-touch. Can detect the signal.

In addition, the touch panel 110 may machine-learn at least one detected signal, and determine a touch operation by the stylus pen 120, a touch operation by a hand, and non-touch based on the result of the machine learning.

Meanwhile, when the touch driving signal is received from the touch panel 110, the stylus pen 120 according to an embodiment generates a stylus signal having a higher frequency than the touch driving signal, and the generated stylus signal is touch panel 110. Can be delivered to.

A detailed description of the touch panel 110 and the stylus pen 120 of FIG. 1 will be described in more detail with reference to FIGS. 2 to 3 below.

2 is a view for explaining a stylus pen of a touch system according to an embodiment of the present invention.

Referring to FIG. 2, the stylus pen 200 according to an embodiment may include a driving signal receiving unit 210, a stylus signal generating unit 220, and a signal transmitting unit 230.

First, the driving signal receiving unit 210 according to an embodiment may receive a touch driving signal from the touch panel.

For example, the driving signal receiver 210 may include a receiving electrode and receive a touch driving signal from the touch panel through the receiving electrode.

According to one side, the driving signal receiving unit 210 may receive a touch driving signal when a touch operation occurs between a tip of the stylus pen 200 and a touch panel.

In other words, when the tip of the stylus pen contacts the screen of the touch panel, the driving signal receiving unit 210 may receive a touch driving signal applied to a driving line positioned at a contact point of the screen.

Next, when receiving the touch driving signal, the stylus signal generator 220 according to an embodiment may generate a stylus signal having a higher frequency than a preset value than the touch driving signal.

For example, the stylus signal generation unit 220 may generate a stylus signal while the touch driving signal is detected.

In addition, the stylus signal generator 220 may generate a plurality of stylus signals having a higher frequency than a preset value than the touch driving signal based on a plurality of buttons and pressure information provided in the stylus pen 200.

Specifically, the stylus pen 200 according to an embodiment may include at least one button and a pen pressure measuring means capable of measuring the pressure of the tip of the stylus pen 200.

On the other hand, the stylus signal generator 220 may generate a plurality of stylus signals having a higher frequency than a preset value based on the pressing action of at least one button or the pressure measurement information measured by the pressure measurement means.

For example, the stylus pen 200 may include a first button, a second button, and a third button, and when a pressing operation of the first to third buttons occurs by a user, input of the first to third buttons The signal may be provided to the stylus signal generator 220.

In addition, the stylus pen 200 may classify the pressure information measured by the pressure measurement means into three stages: a weak pressure, a medium pressure, and a strong pressure by a predetermined threshold.

In the present invention, the stylus pen 200 is provided with first to third buttons, and an example of classifying the pressure information into three steps is described, but the step of classifying the number of buttons and the pressure information is limited to the above-described example. It is not, and various numbers and steps can be applied.

For a more specific example, in a state in which the touch driving signal is received, the stylus signal generating unit 220 generates a first stylus signal having a higher frequency than the touch driving signal when the button input signal is not received, and inputs the first button. Upon receiving the signal, a second stylus signal having a higher frequency than the first stylus signal may be generated.

Likewise, when the second button input signal is received, the stylus signal generator 220 may generate a third stylus signal having a higher frequency than the second stylus signal. It is possible to generate a fourth stylus signal having a high frequency.

On the other hand, the stylus signal generator 220 generates a first stylus signal having a higher frequency than the touch driving signal when the pen driving information is not received while receiving the touch driving signal, and the first stylus when receiving the weak pen pressure information. A fifth stylus signal having a higher frequency than the signal can be generated.

Similarly, the stylus signal generator 220 generates a sixth stylus signal having a higher frequency than the fifth stylus signal when receiving the intermediate pressure information, and receives a strong pressure information, a seventh stylus signal having a higher frequency than the sixth stylus signal You can also generate a stylus signal.

In the present invention, an embodiment in which the stylus signal generation unit 220 generates first to seventh stylus signals having a higher frequency than the touch driving signal according to the button input signal and the pen pressure information is described, but the stylus signal generation unit ( The plurality of stylus signals generated in 220) is not limited thereto, and a stylus signal having various numbers of different frequencies may be generated according to a button input signal and pen pressure information.

On the other hand, the tip of the stylus pen according to an embodiment may be formed thinner by adjusting the pulse voltage of the stylus signal generated by the stylus signal generator 220.

The signal transmission unit 230 according to an embodiment may transmit the stylus signal generated by the stylus signal generation unit 220 to the touch panel.

For example, the signal transmission unit 230 may include a transmission electrode, and transmit a stylus signal to the touch panel through the transmission electrode.

According to one side, the signal transmitting unit 230 may transmit the stylus signal while the touch driving signal is detected without a separate synchronization process from the touch driving signal.

In other words, the signal transmitting unit 230 may transmit the generated stylus signal to the touch panel during a time when the touch driving signal is applied to the driving line located at the point where the tip of the stylus fan 200 is touched on the touch panel without synchronization. have.

Specifically, when the stylus signal is synchronized with the touch driving signal and transmitted to the touch panel, the touch panel affects the charge amplifier provided in the touch detection circuit with a pulse having a phase opposite to the touch driving signal, thereby detecting touch. The output voltage value of the circuit changes.

In other words, when the stylus signal is synchronized and transmitted to the touch panel, the mutual capacitance is reduced, as in the case of a touch operation by the user's hand, so that the touch operation on the stylus pen may be mistaken.

Accordingly, the present invention provides a stylus pen 200 that operates without synchronization with a touch driving signal, so that the touch panel can be stably driven without misrecognition of the touch operation.

Meanwhile, the touch panel according to an embodiment may include at least one of a stylus signal according to a touch operation of the stylus pen 200, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to non-touch. Signal can be detected.

In other words, the touch panel is a stylus signal transmitted from the signal transmission unit 230 when a touch operation is performed by the stylus pen 200, a touch detection signal generated when a user touches the hand, and non-touch without a touch operation. It is possible to receive at least one of the non-touch signal generated in the situation of.

For example, the touch operation by the user's hand may include all touch operations using the user's body parts, including the user's fingers, palms, hands, and hands.

In addition, the touch panel may machine-learn at least one sensed signal, and determine a touch action, a touch action by a hand, and non-touch of the stylus pen based on the result of the machine learning.

According to one side, the touch panel includes an analog to digital converter (ADC), samples at least one signal sensed through the ADC, and can machine-learn at least one sampled signal. .

For example, the touch panel may perform machine learning using a support vector machine (SVM) algorithm.

More specifically, the touch panel may perform an initialization process of collecting sampling results of each of the stylus signal, the touch detection signal, and the non-touch signal, and extracting a support vector using the collected result.

Also, the touch panel may determine at least one signal sampled through the extracted support vector as one of a stylus pen touch operation, a hand touch operation, and a non-touch operation.

The detailed description of the touch panel of FIG. 2 will be described later in more detail through FIG. 3.

3 is a view for explaining a touch panel of a touch system according to an embodiment of the present invention.

The touch panel 300 of FIG. 3 is a view for explaining an embodiment of the touch panel of FIG. 1. In the embodiments described through FIG. 3, descriptions overlapping with those described through FIGS. 1 and 2 will be omitted. Shall be

Referring to FIG. 3, the touch panel 300 according to an embodiment may include a driving signal generation unit 310, a sensing unit 320, a sampling unit 330, and a touch determination unit 340.

First, the driving signal generator 310 according to an embodiment may generate a touch driving signal and sequentially transmit the generated touch driving signal to each of a plurality of driving lines (Tx line; Tx0 to TxN).

The sensing unit 320 according to an embodiment receives the touch driving signal from the driving signal generation unit 310, the stylus signal according to the touch operation of the stylus pen, the touch detection signal according to the touch operation by the hand, and non-touch ( Non-touch) can detect at least one of the non-touch signals.

Also, the sensing unit 320 may transmit at least one sensed signal to a sensing line corresponding to a touch point among a plurality of sensing lines (Rx line; Rx0 to RxN).

For example, the plurality of driving lines Tx0 to TxN may be composed of a plurality of driving electrodes, and the plurality of sensing lines Rx0 to RxN may be composed of a plurality of sensing electrodes.

Specifically, the sensing unit 320 may include a touch screen in which a plurality of driving lines Tx0 to TxN and a plurality of sensing lines Rx0 to RxN are formed in a matrix structure, and each driving line and sensing in the touch screen Capacitors may be formed between the lines.

In addition, the capacity of the capacitor formed between the two lines is called mutual capacitance (C _M ), and when touched, the mutual capacitance may decrease, and the sensing unit 320 determines whether there is a touch for each touch pixel. It may include a touch detection circuit for detecting a change in the mutual capacitance. Here, the touch detection circuit may include a charge amplifier.

More specifically, looking at a method for detecting the presence or absence of a touch using the touch detection circuit, the switch provided in the touch detection circuit is closed to discharge (Discharge) the feedback capacitor C _FB and at the same time make the output voltage V _OUT . Given, and subsequently, when a voltage of ΔV _TX is applied to the driving line, the change value (ΔQ _M ) of the amount of charge of the mutual capacitance can be derived through Equation 1 below.

[Equation 1]

ΔQ _M = Δ (CV) = C _M ΔV _TX

Similarly, the change value (ΔQ _FB ) of the amount of charge in the feedback capacitor can be derived through Equation 2 below.

[Equation 2]

ΔQ _FB = Δ (CV) = C _FB ΔV _OUT

At this time, the sum of ΔQ _M and ΔQ _FB should be 0 as shown in Equation 3 below by the law of preserving the amount of charge.

[Equation 3]

ΔQ _M + ΔQ _FB = C _M ΔV _TX + C _FB ΔV _OUT = 0

Summarizing Equation 3 with respect to ΔV _OUT , it is as shown in Equation 4 below, and the final output value is as shown in Equation 5.

[Equation 4]

ΔV _OUT =-(C _M / C _F ) ΔV _TX

[Equation 5]

V _OUT = V _REF- (C _M / C _F ) ΔV _TX

At this time, a change occurs in the output voltage depending on the presence or absence of the touch, and the generated change in the output voltage is accumulated in the feedback capacitor by a specific number for each touch pixel, and the sampling unit 330, which will describe the accumulated value in the feedback capacitor, will be described later. You can sample with digital values.

Meanwhile, when a touch operation occurs between the touch panel 300 and the tip of the stylus pen, the stylus pen receives a touch driving signal from the sensing unit 320 and has a higher frequency than a preset value than the touch driving signal. The stylus signal may be transmitted to the sensing unit 320.

According to one side, the stylus pen may transmit the stylus signal to the sensing unit 320 while the touch driving signal is detected without a separate synchronization process from the touch driving signal.

The sampling unit 330 according to an embodiment may include an analog to digital converter (ADC), and sample at least one signal sensed through the detector 320 through the ADC.

The detailed description of the sampling unit 330 of FIG. 3 will be described later in more detail with reference to FIG. 5.

The touch determination unit 340 according to an embodiment may machine-learn at least one sampled signal, and determine a touch operation, a hand touch operation, and a non-touch operation of the stylus pen according to the machine learning result.

For example, the touch determination unit 340 may perform machine learning using a support vector machine (SVM) algorithm, but the machine learning algorithm of the present invention is not limited to the aforementioned SVM algorithm.

Specifically, the touch determination unit 340 collects the sampling results of each of the stylus signal, the touch detection signal, and the non-touch signal from the sampling unit 330, and extracts a support vector using the collected results. You can do

Next, the touch determination unit 340 may determine at least one signal sampled through the extracted support vector as one of a touch action of a stylus pen, a touch action by a hand, and a non-touch.

That is, if a touch is established by setting a specific threshold level as in the conventional touch algorithm, the stylus signal cannot be distinguished separately, but the present invention provides touch operation and hand operation by the stylus pen through machine learning based on the SVM algorithm. It is possible to more accurately determine the touch operation and non-touch by.

In addition, since the present invention can distinguish both a touch operation by a stylus pen, a touch operation by a hand, and non-touch, palm rejection can also be implemented.

According to one side, when the touch determination unit 340 determines a touch operation by the stylus pen, it collects a sampled touch detection signal corresponding to a preset area around the touch point of the stylus pen to learn the machine, and the machine learning result The unintentional touch operation in the preset area may be determined based on the.

Specifically, when a user uses a stylus pen, an unintentional touch operation may occur in which a hand gripping the stylus pen contacts the touch panel.

In order to determine the unintentional touch operation described above, the touch determination unit 340 may collect a sampling result of a touch detection signal sensed within a preset area around a touch point of the stylus pen.

Next, the touch determination unit 340 may extract a support vector according to the size of the touch area by the user's hand and the position and direction from the touch point of the stylus pen within the preset area based on the collected sampling result. have.

Next, the touch determination unit 340 may determine an unintentional touch operation in a preset area based on the extracted support vector.

4 is a view for explaining an embodiment of providing a stylus signal in the stylus pen according to an embodiment of the present invention.

Referring to FIG. 4, in the timing diagram of reference numeral 400, Tx0 to TxN illustrate touch driving signals transmitted to a plurality of driving lines Tx0 to TxN illustrated in the touch panel of FIG. 3, and timing diagram of reference numeral 400 In Stylus (Tx1) shows the stylus signal transmitted from the stylus pen to Tx1.

Specifically, the driving signal generation unit of FIG. 3 may generate a touch driving signal and sequentially transmit the generated touch driving signal to each of the plurality of driving lines Tx0 to TxN.

Meanwhile, when the stylus pen contacts Tx1 among the driving lines of the touch panel, the stylus pen may transmit the stylus signal to Tx1 while the touch driving signal is applied to Tx1 without synchronizing with the touch driving signal.

That is, by using the present invention, by providing a stylus pen that operates without synchronization with the touch driving signal, it is possible to improve the safety of the touch driving.

5 is a view for explaining the operation of the sampling unit provided on the touch panel according to an embodiment of the present invention.

In the embodiment described through the sampling unit 520 of FIG. 5, descriptions overlapping with the contents described through the sampling unit of FIG. 3 will be omitted.

Referring to FIG. 5, when a touch operation of the stylus pen occurs, the sampling unit 520 of the touch panel receives the stylus signal 511 as an analog signal from the detection unit 320 of FIG. 3, and receives the received stylus signal ( 511) may be sampled as a digital value, and the sampled digital value 531 may be provided to the touch determination unit 340 of FIG. 3.

In addition, the sampling unit 520 receives a touch detection signal 512, which is an analog signal, from the detection unit 320 of FIG. 3 when a touch operation by the user's hand occurs, and receives the received touch detection signal 512. Sampling by digital value, and the sampled digital value 532 may be provided to the touch determination unit 340 of FIG. 3.

In addition, when a touch operation does not occur, the sampling unit 520 receives the non-touch signal 513 which is an analog signal from the sensing unit 320 of FIG. 3, and samples the received non-touch signal 513 as a digital value. (Sampling), the sampled digital value 533 may be provided to the touch determination unit 340 of FIG. 3.

6 is a view for explaining a touch detection method of a touch panel according to an embodiment of the present invention.

FIG. 6 is an embodiment for explaining a method of detecting a touch operation in the touch panel of FIG. 3. In the embodiment described through FIG. 6, descriptions overlapping with the contents described through the touch panel of FIG. 3 will be omitted.

Referring to FIG. 6, in step 610, the touch detection method according to an embodiment may generate a touch driving signal by the driving signal generation unit and sequentially transmit the touch driving signals to each of a plurality of driving lines (Tx lines).

Next, in step 620, when the touch panel and the tip of the stylus pen contact the touch detection method according to an embodiment, the stylus pen receives a touch driving signal from the detection unit and is higher than a preset value than the touch driving signal. The stylus signal having a frequency may be transmitted to the detection unit.

According to one side, in step 620, the touch detection method according to an embodiment may transmit the stylus signal to the detection unit while the touch driving signal is detected without synchronizing the touch driving signal with the stylus pen.

Next, in step 630, the touch detection method according to an embodiment receives the touch driving signal from the detection unit, the stylus signal according to the touch operation of the stylus pen, the touch detection signal according to the touch operation by the hand, and non-touch (Non It detects at least one signal among non-touch signals according to -touch, and may transmit at least one detected signal to a sensing line corresponding to a touch point among a plurality of sensing lines (Rx lines).

Next, in step 640, the touch detection method according to an embodiment may sample at least one signal sensed through an analog to digital converter (ADC) in the sampling unit.

Next, in step 650, the touch detection method according to an embodiment machine-learns at least one signal sampled by the touch determination unit, and according to the result of the machine learning, the touch action of the stylus pen, the touch action by the hand, and the non-touch I can judge.

7 is a view for explaining an embodiment of a method for determining a touch operation of a touch panel according to an embodiment of the present invention.

The touch operation determination method of FIG. 7 is an embodiment for explaining a method for determining a touch operation in the touch determination unit of FIG. 3. In the embodiment described through FIG. 7, a description overlapping with the contents described through the touch determination unit of FIG. 3 It will be omitted.

Referring to FIG. 7, in a method of determining a touch operation according to an embodiment in step 710, the touch determination unit may determine whether the initialization process for determining the touch operation is completed.

According to one side, in step 720, when it is determined that the initialization process is not completed, in the step 720, the touch determination unit collects sampling results of each of the stylus signal, the touch detection signal, and the non-touch signal from the sampling unit. can do.

According to one side, in step 730, a method for determining a touch operation according to an embodiment may extract a support vector using a collection result from the touch determination unit.

According to one side, if it is determined in step 740 that the initialization process is completed according to an embodiment, at least one sampled signal received from the sampling unit through the support vector extracted by the touch determination unit is determined by the stylus pen. It can be determined as one of a touch operation, a touch operation by a hand, and a non-touch.

In the end, by using the present invention, by using the existing touch panel as it is, by distinguishing the touch operation of the hand and the stylus pen without distinguishing the operation mode, it is possible to improve the efficiency of the touch driving while minimizing the cost.

In addition, by providing a stylus pen that operates without synchronization with a touch driving signal, stability of the touch driving can be improved.

In addition, the accuracy of classifying touch motions can be improved through machine learning.

The device described above may be implemented with hardware components, software components, and / or combinations of hardware components and software components. For example, the devices and components described in the embodiments include, for example, a processor, controller, arithmetic logic unit (ALU), digital signal processor (micro signal processor), microcomputer, field programmable array (FPA), It may be implemented using one or more general purpose computers or special purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. The processing device may run an operating system (OS) and one or more software applications running on the operating system. In addition, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of understanding, a processing device may be described as one being used, but a person having ordinary skill in the art, the processing device may include a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that may include. For example, the processing device may include a plurality of processors or a processor and a controller. In addition, other processing configurations, such as parallel processors, are possible.

The software may include a computer program, code, instruction, or a combination of one or more of these, and configure the processing device to operate as desired, or process independently or collectively You can command the device. Software and / or data may be interpreted by a processing device, or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodied in the transmitted signal wave.

The software may be distributed on networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiments or may be known and usable by those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

200: stylus pen 210: drive signal receiver
220: stylus signal generation unit 230: signal transmission unit

Claims (11)

A drive signal receiver configured to receive a touch drive signal from a touch panel;
When the touch driving signal is received, a plurality of stylus signals having a higher frequency than a preset value than the touch driving signal is generated based on at least one of the button input signal and the pen pressure information, depending on the type of button or the degree of pen pressure. Stylus signal generation unit for generating the plurality of stylus signals by varying the size of the frequency and
Signal transmission unit for transmitting the stylus signal to the touch panel
Including,
The touch panel
Detects at least one analog signal among the stylus signal according to a touch operation of a stylus pen, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to a non-touch,
Equipped with an analog to digital converter (ADC), sampling the at least one detected analog signal through the ADC to a digital value,
Machine-learning at least one analog signal sampled with the digital value, and determining a touch operation, touch operation by the hand, and the non-touch of the stylus pen based on the machine learning result
Stylus pen in touch system. According to claim 1,
The driving signal receiver
When a touch operation occurs between the tip of the stylus pen and the touch panel, the touch driving signal is received.
Stylus pen in touch system. According to claim 1,
The signal transmission unit
The stylus signal is transmitted while the touch driving signal is detected without a separate synchronization process from the touch driving signal.
Stylus pen in touch system. delete According to claim 1,
The touch panel
The sampling results of the stylus signal, the touch detection signal, and the non-touch signal are collected, and an initialization process of extracting a support vector using the collected result is performed, and the sampled data is sampled through the support vector. Determining at least one signal as one of the touch action of the stylus pen, the touch action by the hand, and the non-touch
Stylus pen in touch system. A driving signal generating unit generating a touch driving signal and sequentially transmitting the touch driving signals to each of a plurality of driving lines (Tx lines);
Receiving the touch driving signal, detecting at least one analog signal among a stylus signal according to a touch operation of a stylus pen, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to a non-touch, , A sensing unit for transmitting the sensed at least one analog signal to a sensing line corresponding to a touch point among a plurality of sensing lines (Rx line);
An ADC (Analog to Digital Converter), a sampling unit for sampling the at least one detected analog signal through the ADC to a digital value;
A touch determination unit for machine learning at least one analog signal sampled by the digital value, and determining a touch operation of the stylus pen, a touch operation by the hand, and the non-touch according to the result of the machine learning
Including,
The stylus pen
When a touch operation occurs between a touch panel and a tip of the stylus pen, the touch driving signal is received from the sensing unit, and a preset value is greater than the touch driving signal based on at least one of a button input signal and pen pressure information. Generating a plurality of stylus signals having a high frequency as described above, but generating the plurality of stylus signals by varying the magnitude of the frequency according to the type of button or the degree of pressure, and transmits the stylus signals to the detection unit
Touch system touch panel. The method of claim 6,
The stylus pen
The stylus signal is transmitted to the detection unit while the touch driving signal is detected without a separate synchronization process from the touch driving signal.
Touch system touch panel. The method of claim 6,
The touch determination unit
The sampling process of the stylus signal, the touch detection signal, and the non-touch signal is collected from the sampling unit, and an initialization process is performed to extract a support vector using the collected result, and the support vector is extracted. Through the sampled at least one signal is determined as any one of the touch operation of the stylus pen, the touch operation by the hand and the non-touch
Touch system touch panel. Generating a touch driving signal in the driving signal generating unit and sequentially transmitting the touch driving signals to each of a plurality of driving lines (Tx lines);
The sensing unit receives the touch driving signal, and at least one analog signal of a stylus signal according to a touch operation of a stylus pen, a touch detection signal according to a touch operation by a hand, and a non-touch signal according to non-touch Sensing and transmitting the sensed at least one analog signal to a sensing line corresponding to a touch point among a plurality of sensing lines (Rx line);
Sampling the at least one detected analog signal through an analog to digital converter (ADC) in a sampling unit to a digital value;
Machine-learning at least one analog signal sampled by the digital value by a touch determining unit, and determining a touch operation of the stylus pen, a touch operation by the hand, and the non-touch according to the machine learning result
Including,
The step of transmitting to the sensing line
When the touch panel and the tip of the stylus pen contact, the stylus pen receives the touch driving signal from the sensing unit, and is preset from the touch driving signal based on at least one of a button input signal and pen pressure information. Generating a plurality of stylus signals having a higher frequency than the value, but further comprising the step of generating the plurality of stylus signals by varying the magnitude of the frequency according to the type of the button or the degree of pressure, and transmitting it to the detection unit
Method for detecting touch of a touch panel. The method of claim 9,
The step of transmitting the stylus signal to the detection unit
The stylus pen transmits the stylus signal to the detection unit while the touch driving signal is sensed without synchronization with the touch driving signal.
Method for detecting touch of a touch panel. The method of claim 9,
The determining step
Collecting sampling results of each of the stylus signal, the touch detection signal, and the non-touch signal from the sampling unit by the touch determination unit;
Extracting a support vector using the collected result and
And determining, by the touch determination unit, one of the sampled at least one signal through the support vector as one of a touch operation of the stylus pen, a touch operation by the hand, and the non-touch.
Method for detecting touch of a touch panel.

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