KR101903415B1 - Display device with touch screen and method for driving the same - Google Patents

Abstract

More particularly, the present invention relates to a display device capable of distinguishing between a hand mode and a pen mode through touch motion, and a touch screen capable of recognizing a touch only in a touch area within a predetermined size in a pen mode, And a driving method thereof. To this end, a display device having a touch screen according to the present invention includes: a panel for displaying an image; A touch screen on which touch electrodes are formed; A touch sensing unit driving the touch screen to receive sensing signals; And detecting a motion using the touch information received from the touch sensing unit, and switching the touch mode to a hand mode or a pen mode according to the motion, and in the pen mode state, And a signal processor for outputting only the image of the touch information having the touch information through the panel.

Description

Technical Field [0001] The present invention relates to a display device having a touch screen and a method of driving the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device having a touch screen capable of sensing a touch and a driving method thereof.

As mobile electronic devices such as mobile communication terminals and notebook computers are developed, there is an increasing demand for display devices such as flat panel display devices that can be applied thereto.

Examples of such a display device include a liquid crystal display, a field emission display, a plasma display panel, an organic electro luminescence display device, and an electrophoretic display device. (EPD).

Meanwhile, as an input method for inputting a control signal to the display device, a touch input method in which a user can input information directly to a touch screen using a finger or a pen using a touch screen, And the like.

That is, a display device equipped with a touch screen may be used as a display device such as a navigation device, an industrial terminal, a notebook computer, a financial automation device, a game machine, etc. and a display device such as a mobile phone, MP3, PDA, PMP, PSP, Portable terminals, and household appliances such as refrigerators, microwave ovens, and washing machines, and has been widely applied due to its ease of operation.

FIG. 1 is a diagram illustrating a state in which a touch error occurs due to a palm in a conventional display device having a touch screen.

In a conventional display device provided with a touch screen using a capacitive method, as shown in FIG. 1, a user may place a palm on a touch screen to use a pen, When the device is caught, an abnormal touch (A) due to a palm or the like occurs in addition to the normal touch (B) by the pen.

To eliminate this error, a conventional display device equipped with a touch screen uses a method of implementing a Palm Rejection function so that the display device does not recognize the touch even when the palm rests on the touch screen have.

However, the conventional display device having a touch screen has the following problems.

First, there is a limit to the implementation of Palm Rejection.

Second, when you place your hand on the touch screen to use a pen, you must implement a Palm Rejection feature.

Third, we need a system that separates the pen and the hand touch by adding a panel that is applied (driven) like a digital device pen.

The reason why the above-described problem occurs is as follows.

First, in order to distinguish the palm (palm, Palm), there is a way to remove the size of the area. Once you set the size, when you touch the hand with thick finger like thumb, It can not be detected.

Second, in order to speed up the speed of the pen touch, it is necessary to reduce the touch process, and a large process such as Palm Rejection must be implemented.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a touch screen which can distinguish between a hand mode and a pen mode through touch motion, And a method of driving the same.

According to an aspect of the present invention, there is provided a display device including a touch screen, including: a panel for displaying an image; A touch screen on which touch electrodes are formed; A touch sensing unit driving the touch screen to receive sensing signals; And detecting a motion using the touch information received from the touch sensing unit, and switching the touch mode to a hand mode or a pen mode according to the motion, and in the pen mode state, And a signal processor for outputting only the image of the touch information having the touch information through the panel.

Here, the signal processing unit may include: a touch position detecting unit that detects coordinates of a touch with respect to each touch using the touch information transmitted from the touch sensing unit; A motion determiner for determining whether the motion formed by the touch using the coordinate information detected by the touch position detector is a mode switching control signal for requesting a touch mode switching and selecting either a hand mode or a pen mode; And in the pen mode, coordinates detected by the touch position detecting unit are analyzed to filter and delete the corresponding touch information when the touch area exceeds the previously set size, and when the touch area does not exceed the previously set size And a filtering unit for transmitting the touch recognition information to the external system so that an image of the corresponding touch information can be outputted through the panel. The filtering unit transmits touch recognition information to the external system so that an image of all touch information can be output through the panel in the hand mode. The motion determining unit may compare the coordinate information detected by the touch position detecting unit with the touch information continuously received, and switch the touch mode by comparing the coordinate information with the stored mode switching motion. Wherein the motion determination unit compares the coordinate information with the mode switching motion when the mode switching motion for switching to the hand mode or the pen mode is set to be the same, Mode to another touch mode other than the current touch mode. The predetermined size is set in consideration of the size of the touch electrode and the size of the pen. Wherein the motion determining unit maintains the current touch mode when the motion is not the mode switching control signal and the filtering unit is driven according to the current touch mode. The touch information continuously received is touch information received from touch electrodes continuously adjacent to each other or touch information that is temporally continuous.

According to another aspect of the present invention, there is provided a method of driving a display device including a touch screen, the method comprising the steps of: generating touch information for each touch by using touch information transmitted from a touch sensing unit, Detecting coordinates that have been made; Selecting either the hand mode or the pen mode by determining whether the motion formed by the touch using the detected coordinate information is a mode switching control signal requesting the touch mode switching; In the pen mode, coordinates detected by the touch position detector are analyzed to filter and delete the corresponding touch information when the touch area exceeds the predetermined size. If the touch information does not exceed the previously set size, Transmitting touch recognition information to an external system so that an image of the touch information can be output through the panel; And transmitting touch recognition information to the external system such that an image for all touch information can be output through the panel in the hand mode.

The step of determining whether or not the mode switching control signal is received may include comparing coordinates information detected by the touch position detecting unit with continuously stored mode switching motions, The touch mode is switched.

According to the above-mentioned solution, the present invention provides the following effects.

That is, according to the present invention, the hand mode and the pen mode are distinguished through the touch motion. In the pen mode, when the touch is made in the touch region within a certain size, Gives the effect that you can put your hand on the device and use the pen touch.

In addition, the present invention does not require an electronic function in the pen itself and does not require the addition of a new panel that can interact with the pen, do.

Therefore, the present invention does not require a Palm Rejection Process, and a user can place a hand on a display device and touch the pen.

FIG. 1 is a diagram illustrating a state in which a touch error occurs due to a palm in a conventional display device having a touch screen. FIG.
2 is a diagram illustrating an exemplary configuration of a display device having a touch screen according to the present invention.
3 is a diagram illustrating an internal configuration of a signal processing unit applied to a display device having a touch screen according to the present invention.
4 is a flowchart illustrating a method of driving a display device having a touch screen according to an embodiment of the present invention.
5 is a diagram illustrating motion applied to a method of driving a display device having a touch screen according to the present invention.
FIG. 6 is a view illustrating touch regions of various sizes in a method of driving a display device having a touch screen according to the present invention. FIG.
7 is a diagram illustrating a program source for switching a gesture pattern mode applied to a method of driving a display device having a touch screen according to the present invention.
8 is a diagram illustrating an example of a pen touch temporal data change graph applied to a method of driving a display device provided with a touch screen according to the present invention.
FIG. 9 is a diagram illustrating an example of a row-to-row data conversion graph applied to a method of driving a display device having a touch screen according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a view illustrating a configuration of a display device having a touch screen according to the present invention, and FIG. 3 is a diagram illustrating an internal configuration of a signal processing unit applied to a display device having a touch screen according to the present invention.

A display device provided with a touch screen according to the present invention can be applied to a display device having a touch screen using a capacitive method by using a conductive pen having a small thickness and a hand touch Hand Touch).

As shown in FIG. 2, the display device includes a panel 100 for displaying an image, a touch screen 500 for sensing a touch, a scan pulse A data driver 300 for applying a video data signal RGB to the data lines of the panel, a timing controller 400 for controlling the data driver and the gate driver, A touch sensing unit 600 for sensing a touch using a sensing signal sensed by the touch sensing unit, and a sensing unit for sensing the touch position using touch information transmitted from the touch sensing unit and then transmitting touch sensing information to a timing controller or a control unit of the external system And a signal processing unit 700.

A display device having a touch screen according to the present invention can be applied to a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescence Device, EL, and electrophoretic display (EPD).

First, the panel 100 may be formed in various forms according to the type of the flat panel display device according to the present invention. The liquid crystal display device of the above-described display devices is referred to as a touch As an example of a display device using a sensing device, a liquid crystal layer may be formed between two glass substrates. In addition, when the display device according to the present invention is configured as an organic light emitting diode display (OLED), the panel 100 may be configured such that an organic light emitting diode, a data line, and a gate line are formed between two glass substrates have.

Next, the timing controller 400 receives timing signals such as a data enable signal DE and a dot clock signal CLK from an external system and controls the operation timings of the data driver 300 and the gate driver 200 And generates control signals (GCS, DCS). In addition, the timing controller 400 performs a function of rearranging the image data input from the external system and outputting the rearranged image data to the data driver 300. Here, the gate control signal GCS for controlling the gate driver 130 may include a gate start pulse GSP, a gate shift clock GSC, a gate output enable signal GOE, and the like in accordance with the configuration of the gate driver Or may include a start signal VST, a gate clock GCLK, and the like. The data control signal DCS for controlling the data driver 120 includes a source shift clock SSC, a source start pulse SSP, a polarity control signal POL, and a source output enable signal SOE. do. The timing controller 400 controls the data driver 300 and the gate driver 200 and generates control signals for controlling the input and output operation timings of the touch sensing unit 600, 600 may be controlled.

Next, the data driver 300 converts the video data input from the timing controller into an analog pixel signal (video data signal), and supplies a video data signal for one horizontal line in each horizontal period supplied with a scan signal to the gate line, . That is, the data driver 300 converts image data into image data signals using gamma voltages supplied from a gamma voltage generator (not shown), and outputs the image data signals to a data line. The data driver 300 generates a sampling signal by shifting a source start pulse (SSP) from the timing controller 400 according to a source shift clock (SSC). The data driver 300 latches the pixel data RGB (image data) input according to the source shift clock SSC in response to the sampling signal and then responds to a source output enable (SOE) signal Supply in horizontal line units. To this end, the data driver 300 may include a data sampling unit, a latch unit, a digital-analog converter, and an output buffer.

Next, the gate driver 200 shifts a gate start pulse (GSP) transmitted from the timing controller 400 according to a gate shift clock (GSC), sequentially shifts the gate lines GL1 to GLn On voltage Von is supplied to the scan electrodes Y1 through Yn. The gate driver 200 supplies the gate-off voltage Voff to the gate lines GL1 to GLn during the remaining period when the scan pulse of the gate-on voltage Von is not supplied. Meanwhile, the gate driver 200 applied to the present invention may be configured to be independent from the panel and be electrically connected to the panel in various ways. However, the gate driver 200, which is a gate in panel : GIP) method. In this case, the gate control signal for controlling the gate driver 200 may be a start signal VST and a gate clock GCLK.

Although the timing controller 400, the data driver 300 and the gate driver 200 are described as being independently configured in the above description and FIG. 2, a timing controller, a data driver, and a gate driver , And a display driver IC (Display Driver IC).

Next, the touch screen 500 is used for detecting a touch from a user. The touch screen 500 may be configured in various forms such as a resistive type, a capacitive type, and the like, but a touch screen using the capacitive type is applied to the present invention.

Such a touch screen may be configured in various forms according to its placement position. That is, the touch screen 500 may be configured to be stacked on the upper polarizer POL1 of the panel 100. [

Also, the touch screen may be built in the panel 100. In this case, the touch screen may be configured to be sandwiched between the upper polarizer POL1 and the upper glass substrate GLS1.

Further, the touch screen may be configured to be formed on the lower glass substrate together with the pixel TFT array.

That is, the touch screen 500 may be stacked on the panel 100, inserted inside the panel 100, or formed in the pixel TFT array of the panel 100 and integrated with the panel 100, The touch screen according to the present invention may be configured in any of the above-described various forms.

Also, the touch screen is composed of a plurality of touch electrodes having various shapes and sizes.

Next, the touch sensing unit 600 performs a function of sensing whether the user touches the touch screen 500 using the sensing signal received from the touch screen 500, as described above. That is, the touch sensing unit 600 determines whether or not it is touched. If it is determined that the touch is made, the touch sensing unit 600 transmits touch information including touch coordinates to the signal processor 700. The touch sensing unit may have a different configuration depending on whether the touch screen is configured in a mutual mode or a self-cap mode. Hereinafter, the present invention will be described as an example of a mutual touch screen.

The touch screen 500 using the mutual method includes a plurality of driving electrodes Tl through Tn receiving a driving pulse from the touch sensing unit 600 and a driving electrode formed to cross the driving electrode, And a plurality of receiving electrodes R1 to Rm for transmitting the signals to the receiving electrodes R1 to Rm. When a user touches a specific area of the touch screen with a finger or a pen while a driving pulse (voltage) for touch detection is applied to the driving electrodes T1 to Tn of the touch screen 500 configured as described above The electrostatic capacitance between the driving electrodes T1 to Tn and the receiving electrodes R1 to Rm is changed and the change of the capacitance changes the voltage value applied to the signal processing unit 600 through the receiving electrode.

That is, the receiving electrodes are connected to the touch sensing unit 600, and the touch sensing unit determines whether or not the touch is performed using the changed voltage value (sensing signal). If it is determined that the touch is made, the touch information including the coordinate information of the position where the touch is made is transmitted to the signal processing unit.

In other words, the touch sensing unit 600 as described above determines whether the touch is actually performed using the sensing signal, and transmits the touch information about the received sensing signal to the signal processor only when the touch is performed Function.

That is, although the sensing signal is generated by the touch of the user, it may also be generated by various kinds of noise or the like. Therefore, the touch sensing unit 600 recognizes only the sensing signal exceeding the preset threshold value as a touch, And transmits the information to the signal processing unit 700.

Finally, the signal processor 700 detects the touch position using the touch information transmitted from the touch sensing unit 600, and transmits the touch recognition information to the timing controller or the controller of the external system. In particular, the signal processing unit 700 determines the motion of the touched image using the touch information, and converts the touch recognition mode into a hand mode or a pen mode.

3, the signal processing unit 700 includes a touch position detecting unit 710, a motion determining unit 720, and a filtering unit 730.

The touch position detecting unit 710 detects the touch coordinates of each touch using the touch information transmitted from the touch sensing unit when a plurality of touches are sensed.

The motion determiner 720 determines the motion of the image formed by the touch using the coordinate information detected by the touch position detector 710. That is, the motion determining unit 720 determines whether the user is inputting a general character or a graphic, or whether the user is inputting a predetermined motion for inputting a specific control signal to the display device. If the motion is the motion for switching the hand mode, the motion determining unit 720 changes the current touch mode to the hand mode, and if the motion is for switching to the pen mode, switches the current touch mode to the pen mode .

When the touch mode is switched to the pen mode by the motion determining unit 720, the filtering unit 730 analyzes the coordinate information detected by the touch position detecting unit and outputs the touch point (hereinafter simply referred to as 'touch region' The touch information of the touch area is filtered and deleted, and when the touch information does not exceed the predetermined range, the touch information is transmitted to the timing controller or the control unit of the external system . Here, the previously set size can be set in consideration of the size of the touch electrode and the size of the pen.

That is, the touch image based on the touch recognition information can be output through the panel by being combined with the image data which is basically outputted by the timing controller or the control unit of the external system.

Hereinafter, a method of driving a display device having a touch screen according to the present invention will be described in detail with reference to FIGS. 2 to 9. FIG.

FIG. 4 is a flowchart illustrating a method of driving a display device having a touch screen according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a motion applied to a method of driving a display device having a touch screen according to the present invention. FIG. 6 is a diagram illustrating touch regions of various sizes in a method of driving a display device having a touch screen according to the present invention. 7 is a diagram illustrating a program source for switching a gesture pattern mode applied to a method of driving a display device having a touch screen according to the present invention. 9 is a diagram illustrating an example of a finger touch low data conversion graph applied to a method of driving a display device having a touch screen according to the present invention. to be.

First, in a state in which a display device (hereinafter, simply referred to as 'display device') having a touch screen according to the present invention is being driven, the touch position detecting unit 710 detects touch information transmitted from the touch sensing unit 600 To detect the touch position (S402). At this time, when successive touches are made, successive touch positions are continuously detected. On the other hand, in the following description, the present invention is described as an example in which the hand mode is set as a default.

Next, the motion determining unit 720 determines whether the currently input touch is a motion that matches the predetermined motion using the detected touch position (S404). For example, as shown in FIGS. 5A and 5B, a touch panel 500, which is connected to a display device such as a tablet PC or a mobile device, The motion determiner 720 distinguishes between a hand mode and a pen mode when a square model or a gesture pattern such as P, which is the first alphabetical character of a pen, .

That is, when it is determined that the P-shaped motion as shown in FIG. 5 (b) is input in the hand mode, the motion determining unit 720 determines that the P-type motion is a control signal requesting the conversion to the pen mode . In addition, when it is determined that the motion of the rectangular model as shown in FIG. 5A is input in the pen mode, the motion determiner 720 determines that it is a control signal requesting the switch to the hand mode.

However, when the mode switching motions for switching to the hand mode or the pen mode are set to be the same, the motion determining unit 720 compares the coordinate information with the mode switching motion, The mode may be switched to another touch mode other than the current touch mode.

When a motion other than the motion is input, the motion determiner 720 does not judge it as a control signal, and thus performs a process corresponding to the current mode.

Next, when the current touch mode is the hand mode, when it is determined that the mode switching motion for requesting the switching to the pen mode is input through the touch screen, the motion determining unit 720 determines the current touch mode The touch mode is switched from the hand mode to the pen mode. If the touch area determined using the touch information inputted later exceeds a predetermined range, the touch information of the touch area is filtered and deleted (S408) And transmits the touch recognition information for the corresponding touch area to the timing controller (S410).

6 (a), if it is determined that a touch exceeding the preset touch area has been performed, the filtering unit 730 filters and deletes all the touch information in the corresponding area. This is because the touch can be regarded as being made by something other than a pen.

For example, FIG. 8 is an actual value of a variation amount of raw data when a touch is performed on the touch electrode. 8, assuming that the threshold value is set to 200, a touch sensor having a 4.5-mm sensor pattern has a 3-mm pen. , It can be seen that only one area is caught.

Meanwhile, FIG. 9 is an actual value of a change amount of raw data when a finger touch is performed on a touch sensor. 9, assuming that the threshold value is set to 210, a finger (the size of a finger is approximately 9 mm) is lightly touched in a touch electrode having a 4.5 mm sensor pattern , It can be seen that the area is caught by three or more.

That is, since the predetermined size is set in consideration of the size of the touch electrode, the size of the pen, the size of the finger, and the like, when the touch area in the pen mode is larger than a preset size, . Accordingly, in this case, the present invention deletes information on the corresponding touch area, and allows only touch information having a touch area within a predetermined size to be output through the panel.

Next, if the current mode is the pen mode, the motion determination unit 720 determines that the current touch mode is the pen mode, if the control signal for requesting the switch to the hand mode is inputted through the touch operation (S404) Mode to the hand mode, and converts the touch information input thereafter into touch recognition information and transmits the touch recognition information to the timing controller or the control unit of the external system (S410).

That is, in the hand mode, a variety of touches can be performed using a finger, a hand, or the like. Therefore, the filtering unit 730 transmits the touch recognition information to the timing controller or the control unit of the external system without further filtering.

Finally, when the touch information other than the mode switching control signal is received in either the hand mode or the pen mode, the motion determiner 720 performs the process in the corresponding mode.

That is, in the hand mode, the filtering unit 730 transmits touch recognition information for all the touches to a timing controller or a control unit (Host) of the external system. When the mode is the pen mode, the filtering unit 730 Only the generated touch recognition information is transmitted to the timing controller or the control unit (Host) of the external system.

Hereinafter, the present invention as described above will be summarized as follows.

The present invention is applied to a capacitive method generally used for implementing a touch screen.

In the system board (external system) of the display device, a memory for storing an application program, a central processing unit (CPU) for executing an application program, and a touch image based on the image to be displayed on the display device and the touch recognition information (A control section of an external system) (Host) that synthesizes the data, and performs signal interpolation processing and resolution conversion of the composite data. The present invention uses a MCU (signal processing unit) 700 including a multi-touch processor to develop a method of discriminating small conductive pens and hand touches from capacitive touch methods without using additional devices .

That is, in the pen mode, only the touch recognition information filtered by the signal processing unit 700 is transmitted to the control unit (graphic processing circuit) of the external system to synthesize the touch recognition information with the original image to be displayed on the display device , And output through a panel. The signal processing unit 700 may be integrally formed with the touch sensing unit 600, may be integrally formed with the timing controller 400, or may be integrally formed with the control unit of the external system.

The present invention distinguishes between a small conductive pen and a hand touch by using a gesture (motion) instead of using an additional device in a capacitive type, and thus a palm error, which is caused in a mobile device or a tablet PC, Can be reduced to provide user convenience. In addition, the present invention does not require functions such as Palm Rejection, thereby enhancing process efficiency and saving memory. In addition, since the pen used in the present invention does not require a special electrical device, it can be advantageous in price. In addition, when the present invention is used, the overall touch performance can be enhanced.

That is, FIG. 2 shows the configuration of the present invention in which the touch mode is sensed and the pen mode and the hand mode are distinguished from each other by using a motion pattern (Gesture Pattern) in the signal processing unit (MCU)

First, a readout unit (ReadOut IC: ROIC) 600 transmits touch information obtained by converting a sensing signal (Analog) obtained from a touch electrode of a touch screen to a digital signal to a signal processing unit (MCU)

The touch sensing unit 600 or the signal processing unit 700 generates raw data for determining whether a touch is made. The touch sensing unit 600 or the signal processing unit 700 generates a threshold value To detect the touch. That is, although the touch sensing unit 600 performs the above function, the signal processing unit 700 may perform this function.

On the other hand, when the user places a palm or a hand on the device when touching with a pen or a small conductive bar, the touch exceeds a threshold value, causing an unintended touch by the user.

In order to prevent such an error, the present invention switches the touch mode so that only a small area and a small signal such as a pen can be detected through a gesture pattern (motion) which is made in advance.

In the touch method using the capacitive sensing method, the analog signal is converted into a digital signal by the ADC converter in the touch sensing unit (ROIC chip) 600 or the signal processing unit 700, and the digital level is utilized (Raw-Data) .

The pen and touch discrimination method according to the present invention will now be described.

First, raw data for each node is extracted through a sensor scan.

Next, for example, the touch data senses the touch without interruption, has four directions, and detects a gesture pattern (motion) called a rectangle when the length and the length are larger than the predetermined length.

Next, in this case, since the size of the raw data is different between the actual pen and the hand touch and the area of the pen and the area of the pen itself are different from each other, the touch mode detection unit changes the touch mode .

Next, it is necessary to avoid touching by three or more touches and low data levels with a touch sensor electrode pattern, which is created by the area itself, and to avoid sensing by hand, using two or less row data having a small area such as a pen, .

Meanwhile, the process of the program shown in FIG. 7 is a program for describing a method of recognizing a motion (gesture pattern) and switching from a hand mode to a pen mode.

A portion exceeding a predetermined threshold (Threshold) is recognized as a touch while scanning each touch electrode. If the length is equal to or longer than the predetermined gesture pattern, it is recognized as a motion (gesture pattern) and the pen mode is changed from the hand mode to the pen mode.

If you want to change to hand mode again, you can change it again by repeating the above process.

The method of recognizing the pen in pen mode in the system of the present invention is as follows.

First, raw data for each node is extracted through a touch-electrode scan.

Second, look for low data that is higher than the set threshold.

Third, it finds data that has a level * N% higher than that of the hand touch and higher than the threshold value.

Fourth, if the found touch size is equal to or smaller than the pen size, the touch coordinates are transmitted.

For example, as shown in Fig. 6 (a), the size touched by the finger is different from the size when the pen is used.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: touch screen 200: gate driver
300: Data driver 400: Timing controller
500: touch screen 600: touch sensing unit
700: Signal processor

Claims (10)

delete A panel for displaying an image;
A touch screen on which touch electrodes are formed;
A touch sensing unit driving the touch screen to receive sensing signals; And
And a controller for detecting a motion using the touch information received from the touch sensing unit and switching the touch mode to a hand mode or a pen mode according to the motion, And a signal processing unit for outputting only the image of the touch information through the panel,
The signal processing unit,
A touch position detecting unit for detecting coordinates of a touch with respect to each touch using the touch information transmitted from the touch sensing unit;
A motion determiner for determining whether the motion formed by the touch using the coordinate information detected by the touch position detector is a mode switching control signal for requesting a touch mode switching and selecting either a hand mode or a pen mode; And
In the pen mode, coordinates detected by the touch position detector are analyzed to filter and delete the corresponding touch information when the touch area exceeds the predetermined size. If the touch information does not exceed the previously set size, And a filtering unit for transmitting the touch recognition information to an external system so that an image of the touch information can be outputted through the panel. 3. The method of claim 2,
Wherein the filtering unit comprises:
Wherein in the hand mode, the touch recognition information is transmitted to the external system so that an image of all touch information can be outputted through the panel. 3. The method of claim 2,
Wherein the motion determiner comprises:
Wherein the controller is configured to compare the coordinate information detected by the touch position detector with the previously stored mode switching motion for the continuously received touch information to switch the touch mode, . 5. The method of claim 4,
Wherein the motion determiner comprises:
When the mode switching motions for switching to the hand mode or the pen mode are set to be the same, if the coordinate information is compared with the mode switching motion and it is determined that they match, Wherein the touch mode is switched to another touch mode other than the touch mode. 3. The method of claim 2,
The predetermined size is, for example,
The size of the touch electrode, and the size of the pen. 3. The method of claim 2,
Wherein the motion determining unit maintains the current touch mode when it is determined that the motion is not the mode switching control signal,
Wherein the filtering unit is driven according to the current touch mode. 5. The method of claim 4,
The touch information successively received,
Wherein the touch information is touch information received from touch electrodes continuously adjacent to each other or touch information that is temporally continuous. Detecting coordinates of a touch with respect to each touch using touch information transmitted from a touch sensing unit that receives a sensing signal from the touch electrode;
The controller determines whether or not the motion formed by the touch is a mode switching control signal for requesting the touch mode switching using the coordinate information detected in the step of detecting the coordinates in which the touch is made, ;
In the pen mode, when the coordinates detected in the step of detecting the coordinate of the touch are analyzed, if the touch area exceeds the pre-set size, the touch information is filtered and deleted, Transmitting touch recognition information to an external system so that an image for the touch information can be output through the panel; And
And transmitting touch recognition information to the external system so that an image of all touch information can be output through the panel in the hand mode. 10. The method of claim 9,
Wherein the step of selecting either the hand mode or the pen mode comprises the steps of:
And the touch mode is switched by comparing the coordinate information detected in the step of detecting the coordinate with which the touch is made, with the previously stored mode switching motion for the touch information continuously received. A method of driving a display device having a screen.

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