KR20150015097A - Display device and method of driving the same - Google Patents

Abstract

The present invention discloses a display device and an operating method thereof. The display device only drives the driving and reception electrodes in a touch activation area selected by a user to only detect the touch input in the area. Accordingly, the display device includes: a panel including a display area outputting an image and a non-display area without an image; a touch panel including driving electrodes, reception electrodes, first mode sensing electrodes arranged on the outermost edge of the driving electrodes; and second mode sensing electrodes arranged on the outermost edge of the reception electrodes; and a touch sensing unit which analyses the sensing signals received from the second mode sensing electrodes and the driving voltage from the first mode sensing electrodes to set the touch activation area and determines a touch input by only using the activated driving and reception electrodes in the touch activation area.

Description

DISPLAY APPARATUS AND DRIVING METHOD THEREOF

The present invention relates to a display device and a driving method thereof, and more particularly to a display device including a touch panel and a driving method thereof.

The touch panel includes a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting display (OLED), an electrophoretic display (EPD) And is a kind of input device that is installed in the same display device and allows the user to directly touch the screen with a finger or a pen while viewing the display device to input information.

The touch panel may be manufactured independently of the panel constituting the display device, and then attached to the upper surface of the panel, or may be formed integrally with the panel.

1 is a diagram illustrating an example of a conventional method of driving a touch panel.

The touch panel is for sensing a touch from a user, and may be configured in various forms such as a resistance film type and a capacitance type. Hereinafter, with reference to Fig. 1, a touch panel using an electrostatic capacitance method will be described.

The touch panel 40 includes a driving electrode 11 for applying a driving voltage and a receiving electrode 21 for receiving a sensing signal generated by a driving voltage. The touch sensing unit 60 includes a driving unit 61 for applying the driving voltage to the driving electrode 11 and a receiving unit 62 for sensing whether the touching is performed using the sensing signal received through the receiving electrode do.

In the conventional display device using the touch panel 40 as described above, in order to detect whether or not the touch panel 40 is touched, the driving voltage is sequentially applied to the driving electrode 11, Receives the sensing signal through all of the receiving electrodes 21 while the driving voltage is applied to the driving electrode 11 of the driving electrode 11.

Accordingly, when the number of the driving electrodes 11 is A and the number of the receiving electrodes 21 is B, the display device receives and analyzes a total of A x B received signals during one touch sensing period do.

Since the display device using the touch panel 40 as described above is mostly small in size such as a smart phone, a tablet PC, a notebook, and a monitor, the driving electrode 11 formed on the touch panel 40, And the number of the receiving electrodes 21 are not so large.

However, in recent years, the touch panel 40 is also used for a large-sized display device such as a large-sized television, a large-sized monitor or an electronic blackboard. In this case, the number of the driving electrodes 11 formed on the touch panel 40 The number of the receiving electrodes 21 is increased.

In this case, the received signals received during one touch sensing period are increased, thereby increasing the calculation time for the touch sensing analysis. Therefore, it is not quickly judged whether or not the touch is made.

As the number of the driving electrodes 11 and the number of the receiving electrodes 21 increase, the number of the driving voltage supplied to the driving electrodes 11 and the number of the driving voltage supplied to the receiving electrodes 21 The number of voltages is increased. Accordingly, the power consumption for driving the touch sensing unit 60 is increased.

In addition, as the size of the touch panel 40 increases, an unnecessary touch irrelevant to the intention of the user may occur in an area that the user does not desire. In this case, the display device may malfunction.

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 display device capable of driving only driving electrodes and receiving electrodes included in a touch activated area selected by a user, And a driving method thereof.

According to an aspect of the present invention, there is provided a display device including: a panel including a display region in which an image is output and a non-display region in which no image is output; A touch panel in which a first mode sensing electrode disposed at an outermost side of one side of the driving electrodes, a driving electrode, and a second mode sensing electrode disposed at an outermost side of one side of the receiving electrodes are formed; And a touch sensing unit for sensing a drive voltage supplied to the first mode sensing electrode and a sensing signal received from the second mode sensing electrode to set a touch activation area for determining whether the touch panel is touched, And a touch sensing unit for sensing whether the touch panel is touched using only the activation driving electrodes and the activation receiving electrodes included in the touch activation area among the reception electrodes.

According to another aspect of the present invention, there is provided a method of driving a display device, the method comprising: sensing whether an event for selecting a touch activated area is generated from a first mode sensing electrode and a second mode sensing electrode formed in a non- Determining whether or not it is possible; Setting a touch activation area according to the event; And determining whether the touching area is touched.

According to the present invention, since the user can directly select the touch activation area, the touch malfunction in the area where the user does not want can be prevented.

Further, according to the present invention, whether or not the touch is detected can be quickly determined because the touch is analyzed only in the minimum touch activation area desired by the user.

In addition, according to the present invention, since the touch is analyzed only in the minimum touch activation area desired by the user, the power consumption can be reduced.

1 is an exemplary diagram for explaining a conventional method of driving a touch panel.
2 is a configuration diagram of an embodiment of a display device according to the present invention.
3 is a diagram illustrating a configuration of a touch panel and a touch sensing unit applied to a display device according to the present invention.
4 is an exemplary view showing an external configuration of a display device according to the present invention;
5 is an exemplary view showing in detail a configuration of a touch sensing unit applied to a display device according to the present invention.
6 is a flowchart of an embodiment of a method of driving a display device according to the present invention.

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

3 is a view illustrating the configuration of a touch panel and a touch sensing unit applied to a display device according to the present invention. FIG. 4 is a diagram illustrating a touch panel according to an exemplary embodiment of the present invention. FIG. 5 is an exemplary view showing in detail a configuration of a touch sensing unit applied to a display device according to the present invention. Referring to FIG.

2 to 5, a display device according to the present invention includes a panel 100 including a display area A in which an image is output and a non-display area B in which no image is output, The first mode sensing electrode TX0 and the second sensing electrode RX1 are arranged at the outermost sides of one of the electrodes RX1 to RXn, the driving electrodes TX1 to TXm, the driving electrodes TX1 to TXm, A touch panel 500 having a second mode sensing electrode RX0 disposed at the outermost one side of the first mode sensing electrode RXn, RX0 to determine a touch activation region C to be touched or not of the touch panel 500 and then the driving electrodes TX1 to TXm and the receiving electrodes RX1 To RXn, only the activation driving electrodes and the activation receiving electrodes included in the touch activation region (C) A driving voltage supplier for generating the driving voltage, a gate for sequentially supplying gate pulses to the gate lines GL1 to GLg formed on the panel 100, A data driver 300 for supplying a data voltage to the data lines DL1 to DLd formed on the panel 100 and a data driver 300 for supplying the data voltages to the gate driver 200, And a timing controller 400 for controlling the functions of the touch sensing unit 600. [

First, the panel 100 may be a liquid crystal panel, an organic luminescent panel, a plasma display panel, and an electrophoretic display panel.

In the panel 100, the first substrate and the second substrate are bonded together through a laminating process. An intermediate layer is formed between the first substrate and the second substrate.

The intermediate layer may include different structures depending on the type of the display device according to the present invention.

For example, when the display device is a liquid crystal display (LCD), the intermediate layer may include a liquid crystal. When the display device is an organic light emitting diode (OLED), the intermediate layer may include a fluorescent organic compound or the like. When the display device is a plasma display panel (PDP), the intermediate layer may include an inert gas or the like. When the display device is an electrophoretic display (EPD), the intermediate layer may include an electrophoretic dispersion liquid or the like.

The first substrate and the second substrate may be made of glass, plastic, metal, or the like.

Hereinafter, for convenience of explanation, the present invention will be described by way of an example in which the panel 100 is a liquid crystal panel.

When the panel 100 is a liquid crystal panel, the panel 100 may be configured such that a liquid crystal layer is formed between two glass substrates.

In this case, the first substrate (TFT substrate) of the panel 100 includes a plurality of data lines DL1 to DLd, a plurality of gate lines GL1 to GLd crossing the data lines, A plurality of TFTs (Thin Film Transistors) formed on the pixels formed in each of the intersection regions of the data lines DL1 to DLd and the gate lines GL1 to GLg, Pixel electrode or the like is formed. That is, the pixels are arranged in a matrix by the intersection structure of the data lines DL1 to DLd and the gate lines GL1 to GLg.

A black matrix (BM), a color filter, a common electrode, and the like are formed on the second substrate (culler filter substrate) of the panel 100. The common electrode is formed on the upper glass substrate GLS1 in a vertical electric field driving mode such as TN (Twisted Nematic) mode and VA (Vertical Alignment) mode. The common electrode is divided into an IPS (In Plane Switching) mode, an FFS (Fringe Field Switching) Is formed on the lower glass substrate together with the pixel electrode in the same horizontal electric field driving method.

The panel 100 is formed with a display area A in which an image is output and a non-display area B in which no image is output, and is formed by intersection of the data lines and the gate lines The pixels are formed in the display area A. [

The display area A and the non-display area B formed on the panel 100 are arranged in a display area A and a non-display area (not shown) displayed on the touch panel 500 shown in FIG. B at the same time. That is, the display area A of the panel 100 is formed at a position corresponding to the display area A formed on the touch panel 500 of the panel 100, The non-display area B of the panel 100 is formed at a position corresponding to the non-display area B formed in the touch panel 500 of the panel 100.

Second, the touch panel 500 includes a plurality of first mode sensing electrodes (Rx1 to Rxn), driving electrodes (TX1 to TXm), and driving electrodes (TX1 to TXm) And a second mode sensing electrode RX0 disposed on the outermost side of one side of the reception electrodes RX1 to RXn.

Here, the receiving electrodes RX1 to RXn and the driving electrodes TX1 to TXm are formed in the display area A of the touch panel 500, and the first mode sensing electrodes TX0 and / The second mode sensing electrode RX0 is formed in the non-display region B of the touch panel 500. [

That is, the first mode sensing electrode TX0 performs the same function as the driving electrodes TX1 to TXm except that the first mode sensing electrode TX0 is formed in the non-display region B. 3, since the first mode sensing electrode TXO is disposed in the non-display area B formed at the lower end of the touch panel 500, The driving voltage may be supplied to the mode sensing electrode TX0 first, or the driving voltage may be supplied at the latest.

The second mode sensing electrode RX0 performs the same function as the reception electrodes RX1 to RXn except that the second mode sensing electrode RX0 is formed in the non-display region B. [ In the case of the touch panel 500 shown in FIG. 3, the second mode sensing electrode RX0 is disposed in the non-display area B formed on the left side of the touch panel 500. [ The second mode sensing electrode RX0 and the receiving electrodes RX1 through RXn simultaneously transmit a sensing signal to the touch sensing unit 600. [

As described above, the first mode sensing electrode TX0 and the second mode sensing electrode RX0 are formed in the non-display region B of the touch panel 500, and the non- As shown in FIG. 4, corresponds to an area where no image is displayed on the front face of the display device.

The non-display area B of the touch panel 500 may be covered by a top case 700 constituting the display device as shown in FIG. 4, Or may be covered with a black matrix when not exposed to the front surface of the display device.

When the first mode sensing electrode TX0 and the second mode sensing electrode RX0 are covered by the top case 700, the first mode sensing electrode TX0 is connected to the top case 700, A first groove 710 for exposing the second mode sensing electrode RX0 to the outside and a second groove 720 for exposing the second mode sensing electrode RX0 to the outside may be formed.

That is, when the user touches the first mode sensing electrode TX0 or the second mode sensing electrode RX0 through the first groove 710 or the second groove 720, the touch sensing unit 600 May determine the touch position and set the touch activation area. This will be described in detail with reference to Fig.

The touch panel 500 may be formed independently of the panel 100 and attached to the panel 100, as shown in FIG.

When the touch panel 500 is formed independently of the panel 100 and attached to the panel 100, the type of the panel 100 is not limited. That is, since the touch panel 500 senses whether or not the touch panel 500 independently touches the touch panel 500 irrespective of the driving of the panel 100, the panel 100 includes a liquid crystal panel, an organic light emitting panel, a plasma display panel, And the like. In this case, in the display area A of the touch panel 500, the reception electrodes RX1 to RXn arranged in parallel with the data lines and the driving electrodes RX1 to RXn arranged in parallel with the gate lines (TX1 to TXm) are formed. The non-display region B of the touch panel 500 includes a first mode sensing electrode (not shown) disposed at the outermost one side of the driving electrodes TX1 to TXm, And a second mode sensing electrode RX0 disposed at the outermost side of one side of the reception electrodes RX1 to RXn and disposed in parallel with the reception electrodes. The receiving electrodes, the second mode sensing electrode, the driving electrodes, and the first mode sensing electrode are insulated by an insulator.

In addition, the touch panel 500 may be embedded in the panel 100. When the touch panel 500 is embedded in the panel 100, the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn apply a common voltage and a driving voltage to the panel 100 And performs the function of supplying alternately. That is, in this case, the panel 100 performs both a function of displaying an image using the common voltage and a function of receiving the driving voltage and transmitting the sensing signal to the touch sensing unit 600 As the panel 100, a liquid crystal panel may be used. However, other types of panels for displaying an image using a common voltage other than the liquid crystal panel may also be applied. When the touch panel 500 is embedded in the panel 100, the touch panel may be a hybrid in-cell type or an inshell type.

The touch panel 500 of the hybrid in-cell type is disposed on the first substrate (TFT substrate) or the second substrate (color filter substrate), and is arranged in parallel with the plurality of gate lines formed on the first substrate The first mode sensing electrode TX0 and the second mode sensing electrode TX0 are disposed on the upper surfaces of the driving electrodes TX1 through TXm, the first mode sensing electrode TX0, and the second substrate (color filter substrate) (RX1 to RXn) and a second mode sensing electrode (RX0) disposed with an insulating film between the first mode sensing electrode (TX0) and the second sensing electrode (RX0). However, the receiving electrodes may be formed on the first substrate or the second substrate, and the driving electrodes may be formed on the upper surface of the second substrate.

The touch panel 500 of the in-cell type includes the driving electrodes TX1 to TXm, the receiving electrodes RX1 to RXn, the first mode sensing electrode TX0) and the second mode sensing electrode (RX0). That is, in the in-cell type touch panel 50, the driving electrodes, the receiving electrodes, the first mode sensing electrode TX0, and the second mode sensing electrode RX0 are all connected to the first substrate Substrate). In particular, the driving electrodes and the receiving electrodes may be formed on the same substrate on the first substrate. In this case, in the region where the driving electrode and the receiving electrode intersect, any one of the driving electrode and the receiving electrode is connected to another layer through the contact hole, so that the driving electrode and the receiving electrode are substantially . The driving electrodes and the reception electrodes, which satisfy the above-described structure, may be formed on the TFT substrate by various methods.

As described above, in the display device according to the present invention, the touch panel 500 may be formed independently of the panel 100 and then attached to the touch panel 500, and may be integrally formed with the panel 100 The present invention will be described by way of an example of the touch panel 500 formed independently of the panel 100 for convenience of explanation. That is, the contents described below can be applied to the display device composed of the touch panel 500 of the hybrid in-cell type or the in-cell type.

Thirdly, the timing controller 400 receives a timing signal such as a data enable signal (DE) and a dot clock signal (CLK) from an external system, and receives the timing signal from the data driver 300 and the gate driver 200 And generates control signals (GCS, DCS) for controlling the timing. In addition, the timing controller 400 rearranges the input image data input from the external system, and outputs the rearranged image data to the data driver 300.

The data control signal DCS includes a source shift clock SSC, a source start pulse SSP, a polarity control signal POL, and a source output enable signal SOE.

The gate control signal GCS may include a gate start pulse GSP, a gate shift clock GSC, a gate output enable signal GOE or the like in accordance with the configuration of the gate driver, VST), a gate clock (GCLK), and the like.

The timing controller 400 controls the data driver 300 and the gate driver 200 and generates control signals for controlling the operation timings of the inputs and outputs of the touch sensing unit 600 And the touch sensing unit 600 may be controlled.

In order to perform the functions as described above, the timing controller 400 includes a receiver for receiving input image data and timing signals from the external system, a control signal generator for generating various control signals, A data arrangement unit for rearranging the input image data and outputting rearranged image data Data, and an output unit for outputting the control signals and the image data.

The timing controller 400 rearranges input image data input from the external system according to the structure and characteristics of the panel 100 and transmits the rearranged image data to the data driver 300 do. Such a function can be executed in the data arrangement section.

The timing controller 400 uses the timing signals transmitted from the external system, that is, the dot clock CLK, the vertical synchronization signal Vsync, the horizontal synchronization signal Hsync, and the data enable signal DE A data control signal DCS for controlling the data driver 300 and a gate control signal GCS for controlling the panel built-in gate driver 200 and outputting the control signals to the data driver 300, To the gate driver (200). This function can be executed in the control signal generation unit.

The control signal transmitted to the touch sensing unit 600 is generated by the control signal generating unit.

Fourth, the data driver 300 converts the image data input from the timing controller 400 into an analog data voltage, and supplies a data voltage for one horizontal line in each horizontal period in which a scan signal is supplied to the gate line To the data lines. That is, the data driver 300 converts the image data into a data voltage using the gamma voltages supplied from the gamma voltage generator (not shown), and outputs the data voltage to the data lines.

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 according to a sampling signal, changes the data voltage to a data voltage, And supplies the data voltages to the data lines in units of horizontal lines in response to a SOE (Source Output Enable) signal.

For this, the data driver 300 may include a shift register unit, a latch unit, a digital-analog converter, and an output buffer.

The shift register unit outputs a sampling signal using data control signals (SSC, SSP, etc.) received from the timing controller (400).

The latch unit latches the digital image data (Data) sequentially received from the timing controller (400), and simultaneously outputs the digital image data (Data) to the digital-analog converter (DAC).

The digital-to-analog converter converts the image data transmitted from the latch unit into a data voltage of positive or negative polarity and outputs the same. That is, the digital-analog converter uses the gamma voltage supplied from the gamma voltage generator (not shown) to generate the image data according to the polarity control signal POL transmitted from the timing controller 400 Polarity or negative polarity data voltage and outputs the data voltage to the data lines.

The output buffer outputs a positive or negative data voltage transmitted from the digital-analog converter to the data line DL (DL) of the panel according to a source output enable signal SOE transmitted from the timing controller 400 ).

Fifth, the gate driver 200 shifts a gate start pulse (GSP) transmitted from the timing controller 400 according to a gate shift clock (GSC) On voltage Von to the scan lines GL1 to GLg. The gate driver 200 supplies the gate-off voltage Voff to the gate lines GL1 to GLn during the remaining period when no scan signal of the gate-on voltage Von is supplied.

The gate driver 200 according to the present invention may be formed independently from the panel 100 and may be electrically connected to the panel 100 in various ways. A gate-in-panel (GIP) method may be used. 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 data driver 300, the gate driver 200 and the timing controller 400 have been described as being independently configured in the above description, at least one of the data driver 300 and the gate driver 200 Either one may be integrated with the timing controller 400.

Sixth, the driving voltage supplier 640 generates a driving voltage to be supplied to the driving electrodes TX1 to TXm and the first mode sensing electrode TX0 for touch sensing. The driving voltage generated by the driving voltage supplier 640 is sequentially supplied to the driving electrodes TX1 to TXm and the first mode sensing electrode TX0 through the touch sensing unit 600. [

The driving voltage supplier 640 may generate the driving voltage in the form of a pulse using the maximum voltage VH and the minimum voltage VL supplied from the power supply unit not shown.

The driving voltage supply unit 640 may be formed independently of the touch sensing unit 600, but may be formed inside the touch sensing unit 600, as shown in FIG.

Also, although not shown in the drawings, when the panel 100 shown in FIG. 2 is a liquid crystal panel, the display device may include a common voltage supply unit for supplying a common voltage to the panel. In this case, the common voltage may be supplied to the driving electrodes and the receiving electrodes through the touch sensing unit 600. The common voltage supply unit may be included in the touch sensing unit 600 or independently of the touch sensing unit 600.

2, the display device may include a reference voltage supply unit for supplying a reference voltage to the touch sensing unit 600. In addition, The reference voltage Vref is supplied to the receiving unit 620 included in the touch sensing unit 600. Since the receiving unit 620 is connected to the receiving electrodes 121, A voltage corresponding to the reference voltage is also applied to the receiving electrodes by the reference voltage supplied to the receiving unit 620.

The receiving unit 620 determines whether the touch panel 500 is touched by using the reference voltage Vref and the sensing signal received from the receiving electrodes.

The reference voltage supply unit may be included in the touch sensing unit 600 or may be formed independently of the touch sensing unit 600.

Seventh, the touch sensing unit 600 performs a touch sensing function using sensed signals (voltage values) received from the receiving electrodes RX1 to RXn and the second mode sensing electrode RX0 do.

That is, when the driving voltage for touch detection is sequentially applied to the driving electrodes TX1 to TXm and the first mode sensing electrode TX0, A capacitance between the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn is changed by touching a specific region and a change in the electrostatic capacitance is detected from the receiving electrodes RX1 to RXn The voltage value (sensing signal) transmitted to the touch sensing unit 600 is changed.

The touch sensing unit 600 is connected to the touch panel 500 using the voltage value sensed by the touch sensing unit 600. [ Or not.

Particularly, the touch sensing unit 600 analyzes the driving voltage supplied to the first mode sensing electrode TX0 and the sensing signal received from the second mode sensing electrode RX0, Of the driving electrodes (TX1 to TXm) and the receiving electrodes (RX1 to RXn) and the activation driving electrodes included in the touch activation area It is determined whether or not the touch is made using only the electrodes.

That is, the touch sensing unit 600 senses a first touch coordinate determined by a touch on the first mode sensing electrode TX0 and a second touch coordinate determined by a touch on the second mode sensing electrode RX0 After setting the touch activated area using the two-touch coordinates, it is determined whether or not the touch activated area is touched.

5, the touch sensing unit 600 includes driving switches 611 connected to the driving electrodes TX1 to TXm and the first mode sensing electrode TX0, respectively, And receiving switches 621 connected to the receiving electrodes RX1 to RXn and the second mode sensing electrode RX0. The receiving electrodes RX1 to RXn, And a control unit 620 for controlling the driving switches 611 and the receiving switches 621 to determine the touch activation area C using the sensing signal received from the second mode sensing electrode RX0, And a control unit for supplying the driving voltage only to the activation driving electrodes included in the touch activation area C and for receiving the sensing signal received from the activation receiving electrodes included in the touch activation area by the receiving unit 620 And a control unit 630.

First, the driver 610 supplies the driving voltage supplied from the driving voltage supplier 640 to the driving switches 611 through the driving switches 611 according to the control signal supplied from the controller 630 during the touch sensing period. To the driving electrodes TX1 to TXm. That is, the controller 630 outputs a control signal for connecting all of the drive switches 611 to the drive voltage supplier 640 according to the touch sensing period control signal transmitted from the timing controller 400 To the drive switches 611. The driving switches 611 are turned on in response to the control signal transmitted from the controller 630 and are supplied to the driving voltage supplier 640 and the driving electrodes TX1 to TXm and the first mode sensing electrode TX0 ).

However, the first synchronous signal that enables the activation driving electrodes included in the touch activation area C to be connected to the driving voltage supply unit 640 that supplies the driving voltage is the driving signal from the controller 630, When the driving voltage is supplied to the switches 611, the driving switches 611 connected to the activation driving electrodes are turned on to connect the driving voltage supplying unit 640 and the activation driving electrodes.

That is, during the touch sensing period, the driving unit 610 turns on all the driving switches 611 according to the control signal transmitted from the control unit 630, so that all of the driving electrodes TX1 to TXm, And supplies the driving voltage to the first mode sensing electrode. The driving unit 610 may turn on only some of the driving switches 611 according to the control signal to turn on the driving voltage only to the activation driving electrodes connected to the turned- .

The driving switch for connecting the first mode sensing electrode TX0 and the driving voltage supply unit 640 among the driving switches 611 is connected to the driving voltage supply unit 640, 1 mode sensing electrode (TX0). Therefore, the driving voltage is continuously supplied to the first mode sensing electrode TX0 during the touch sensing period.

The receiving unit 620 includes receiving switches 621 connected to the receiving electrodes RX1 to RXn and the second mode sensing electrode RX0, RXn and the sense signal received from the second mode sensing electrode RX0.

To this end, the receiving unit 620 includes the receiving switches 621 and the touch position determining unit 622, as shown in FIG.

The reception switches 621 are turned on in response to a control signal transmitted from the controller 630 during the touch sensing period and are turned on and off from the reception electrodes RX1 to RXn and the second mode sensing electrode RX0 And transmits the received sensing signals to the touch position determination unit 622.

However, the second synchronizing signal for allowing the touch position determiner 622 to input the sensing signal generated from the activation receiving electrodes included in the touch activation area may be transmitted from the controller 630 to the reception switches The receiving switches 621 connected to the activation receiving electrodes are turned on to connect the touch position determining unit 622 and the activation receiving electrodes.

That is, during the touch sensing period, the receiving unit 620 turns on all the receiving switches 621 according to the control signal transmitted from the controller 630, and outputs the received signals from all the receiving electrodes RX1 to RXn And transmits the transmitted sensing signals to the touch position determination unit 622. [ In response to the control signal, the receiving unit 620 may turn on some receiving switches of the receiving switches 621 to turn on the receiving switches 612, which are received from the activated receiving electrodes connected to the turned- Signal to be transmitted to the touch position determination unit 622. [

The reception switch for connecting the second mode sensing electrode RX0 and the touch position determination unit 622 among the reception switches 621 is connected to the touch position determination unit 622, And connects the second mode sensing electrode RX0. Therefore, the sensing signal is continuously supplied from the second mode sensing electrode RX0 to the touch position determination unit 622 during the touch sensing period.

The control unit 630 controls the driving voltage supplied to the driving voltage supplier 640 so that the driving voltage is supplied to the driving voltage supply unit 640 when the control signal indicating the touch sensing period is received from the timing controller 400. [ To the drive switches (611).

When the controller 630 receives information indicating that the touch activation area has been set by the touch position determination unit 622, the activation drive electrodes included in the touch activation area C are driven by the driving voltage supplier 640, And supplies the first synchronous signal to the driving switches 611. [ In accordance with the first synchronization signal, the driving switches 611 connected to the activation driving electrodes are turned on to connect the driving voltage supply unit 640 and the activation driving electrodes.

When the controller 630 receives information indicating that the touch activation area is set by the touch position determination unit 622, the control unit 630 controls the touch position determination unit 622 such that the sensed signal generated from the activation receiving electrodes included in the touch activation area, And supplies the second synchronizing signal to the receiving switches 621 so as to be input to the receiving switch 622. According to the second synchronization signal, the reception switches 621 connected to the activation receiving electrodes are turned on to connect the touch position determination unit 622 and the activation receiving electrodes.

The controller 630 sets a default area set as a default to the touch activated area and determines whether the touch area is touched in the default area when the set touch activated area is released.

The touch position determination unit 622 and the control unit 630 may be formed in the timing controller 400 or another component. That is, the receiver 600 determines whether the touch panel 500 is touched by using the sensing signals received from the touch panel 500, and if the touched sensing is performed, To the timing controller 400 or to the separate component. In this case, the timing controller 400 or the other component may determine the location of the touch using the touch location information, and may set the touch activation area according to the determination result. The timing controller 400 may generate the first synchronous signal and the second synchronous signal according to the touch activation area and transmit the generated first synchronous signal and the second synchronous signal to the driving unit 610 and the receiving unit 620 .

Hereinafter, with reference to Fig. 6, a method of driving a display device according to the present invention will be described in detail.

6 is a flowchart of an embodiment of a method of driving a display device according to the present invention.

6, the first mode sensing electrode TX0 formed in the non-display region B of the touch panel 500 and the second mode sensing electrode TX0 formed in the non-display region B of the touch panel 500, Determining whether or not an event for selecting the touch activated area has been generated from the sensing electrode RX0 (S102), determining whether the touch activated area is touched after setting the touch activated area according to the event (S104), and if a touch is not generated in the touch activation area for a predetermined period of time (S106), a default area set as a default is set as the touch activation area (S108) (S110).

First, when the display device is driven, the display device displays an image through the panel 100 during a video display period, and detects whether the touch panel 500 is touched during a touch sensing period.

If the touch panel 500 is configured independently of the panel 100, the image display period and the touch sensing period are also independently configured.

However, if the touch panel 500 is integrally formed with the panel 100, one frame period is divided into the video display period and the touch sensing period.

Next, an event for selecting the touch activation area is selected from the first mode sensing electrode TX0 and the second mode sensing electrode RX0 formed in the non-display area B of the touch panel 500 The touch position determination unit 622 determines whether or not the first mode sensing electrode TX0 of the touch panel 500 and the second mode sensing electrode TX2 of the touch panel 500 during the touch sensing period, It is determined whether a touch is generated at a position corresponding to the electrode RX0.

During the touch sensing period, the driving voltage is sequentially supplied to the first mode sensing electrode TX0 and the driving electrodes TX1 through TXm.

4, when the user touches the first groove 710 or the second groove 720, a position corresponding to the first mode sensing electrode TX0 or a position corresponding to the first mode sensing electrode TX0, A touch is sensed at a position corresponding to the second mode sensing electrode RX0.

The touch position determiner 622 determines whether the touch event is generated at a position corresponding to the first mode sensing electrode TX0 or at a position corresponding to the second mode sensing electrode RX0 (S102).

Next, in the step of setting the touch activation area according to the event, the touch position determination unit 622 or the control unit 630 determines whether or not the first touch sensed by the touch on the first mode sensing electrode TX0 The touch activation area C is set by using at least one of the coordinates T3 or the second touch coordinates T1 and T2 determined by the touch on the second mode sensing electrode.

For example, as shown in FIG. 4, it is sensed that a touch is present at a first position on the second mode sensing electrode, and within a predetermined time, a second position on the second mode sensing electrode, The touch position determination unit 622 or the control unit 630 determines whether the touch position is detected at the third position on the sensing electrode by comparing the coordinates T1 corresponding to the first position, (T2) and coordinates (T3) corresponding to the third position are used to set the touch activation area (C).

In this example, the touch is sensed at the third position T3 on the first mode sensing electrode TX0 and the touch is sensed at the first position T1 and the second position T2 on the second mode sensing electrode RX0. Was detected.

When the coordinate of the touch sensed on the first mode sensing electrode TX0 is referred to as the first touch coordinate, the first touch coordinate includes the third position T3.

When the coordinate of the touch sensed on the second mode sensing electrode RX0 is referred to as the second touch coordinate, the second touch coordinate includes the first position T1 and the second position T2.

The first touch coordinates may include one or two touch positions, and the second touch coordinates may also include one or two touch positions. In the example shown in FIG. 4, the first touch coordinates include one touch position T3, and the second touch coordinates include two touch positions T1 and T2.

In this case, the touch position determination unit 622 or the control unit 630 sets the touch activation area C using the first touch coordinates and the second touch coordinates. That is, as shown in FIG. 4, the touch position determination unit 622 or the control unit 630 determines whether the first touch coordinates T3 and the second touch coordinates T1, Area as the touch activation area (C).

However, the touch activation area C may be set using only the first touch coordinate or the second touch coordinate.

4, when a touch is detected only at the first position T1 and the second position T2 on the second mode sensing electrode RX0, the touch position determiner 622 or The controller 630 may set an area surrounded by the second touch coordinates T1 and T2 as the touch activation area C. [

If it is determined that no touch is generated from the first mode sensing electrode TX0 and the second mode sensing electrode TX0, the touch position determiner 622 or the controller 630 determines whether a touch ) Is set to the touch activation area (C).

The default area may be the entire display area A of the display device shown in Fig. 4, or may be a part of the display area.

The default area may be set by the manufacturer of the display device. The manufacturer can set the default area by analyzing the type, size and usage of the display device and application programs for touch applied to the display device. Information on the default region may be stored in the touch position determination unit 622, the control unit 630, the timing controller 400, or the like. Hereinafter, the present invention will be described in which the user touches at least one of the first mode sensing electrode TX0 and the second mode sensing electrode RX0 to set the touch activation region.

Next, in step S104, it is determined whether or not the touch activated area has been touched. In step S104, among the driving electrodes formed in the display area of the touch panel 100, And the second mode sensing electrode RX0 and the second mode sensing electrode RX0, and supplies the driving voltage to the first mode sensing electrode TX0, Signal is used to determine whether or not a touch is made.

That is, in the present invention, when the touch activation area C is set, the driving voltage is supplied only to the activation driving electrodes included in the touch activation area, And determines whether or not the touch is in the touch activation area C and the touch position.

The control unit 630 transmits the first synchronization signal to the driving unit 610 and supplies the second synchronization signal to the reception unit 620.

Since the touch activation area C may be changed by another event after the touch activation area C is set, the first mode sensing electrode TX0 is continuously supplied with the driving voltage And the sensing signal transmitted from the second mode sensing electrode RX0 is received by the receiving unit 620 continuously.

After touching the first mode sensing electrode TX0 and the second mode sensing electrode RX0 and detecting the touch activation area S102 and S104, (S106), the default area set as the default is set as the touch activation area (S108), and it is determined whether the default area is touched (S110).

That is, when the above-described event is generated in a state where a portion of the display area A or the display area A of the touch panel 500 is set as the default area, The touch activation area C is set.

However, if the touch is not generated for a certain period of time after the touch activated area C is set by the event, it is determined that the intention of the user to use the touch activated area C no longer exists have.

Accordingly, in this case, the present invention sets the default area as the touch activation area after releasing the touch activation area C set by the user, and determines whether the touch area is the touch area or the touch area in the default area .

The touch position determiner 622 or the controller 630 may set the mode of the touch panel 500 to idle mode if the touch is not continuously generated in the state that the touch activation area is set, ) Mode.

Here, the idle mode is a mode that is generated when a touch is not generated until a predetermined period elapses from the touch panel 500, and is a mode for releasing the touch activation area. That is, if a touch is not generated until a predetermined period elapses from the touch panel 500 after the touch activation area C is set, the touch panel 500 is switched to the idle mode .

After switching to the idle mode, the touch position determination unit 622 or the control unit 630 determines whether a predetermined period has elapsed (S106).

That is, the present invention determines whether or not a predetermined period elapses after switching to the idle mode so as to give the user sufficient time.

As a result of the determination, when the predetermined period has elapsed, the default area is set as the touch activation area (S108), and it is determined whether or not the touch is in the default area (S110).

A period for setting the default area as the touch activation area may be variously set by a manufacturer of the display device after a period for switching to the idle mode and a period for switching to the idle mode.

As described above, the touch panel 500 and the display device can be efficiently driven by allowing a user to directly select an area in which the touch panel 500 can be detected.

A display device and a driving method thereof according to the present invention as described above will be briefly summarized as follows.

As an input device of a display device, a touch panel is activated, and the touch panel is becoming larger and larger. As the size of the touch panel is increased, an area where touch is unnecessary among the touch panels may be generated according to a method of using the user or a characteristic of an application program. For example, when the display device is used as an electronic blackboard, the display device may be divided into a display area for outputting various images and a handwriting area for inputting various information. Although the touch panel is provided, In a large-sized display device, a touch may be unnecessary. In this case, a touch is generated in an area in which a touch is unnecessary, so that the display device may malfunction or power consumption may increase due to an unnecessary touch.

In order to solve this problem, the present invention allows a user to dynamically designate an area in which a touch is desired to be driven. In order to realize this, in the display device according to the present invention, a first mode sensing electrode TX0 and a second mode sensing electrode RX0 are added in a non-display region, and the first mode sensing electrode or the second mode When an event is generated in at least one of the sensing electrodes, the touch activated area is set by the event. According to the present invention, since the occurrence of unnecessary touch is prevented as described above, malfunction of the display device can be prevented. In addition, according to the present invention, since the driving voltage for touch detection is supplied only to the activation driving electrodes included in the touch activation area, the power consumption of the display device can be reduced.

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: panel 200: gate driver
300: Data driver 400: Timing controller
600: Touch sensing unit 610:
620: Receiving unit 630:
611: driving switch 622: receiving switch
640: driving voltage supply unit

Claims (10)

A panel including a display region in which an image is output and a non-display region in which no image is output;
A touch panel in which a first mode sensing electrode disposed at an outermost side of one side of the driving electrodes, a driving electrode, and a second mode sensing electrode disposed at an outermost side of one side of the receiving electrodes are formed; And
And a controller for controlling a driving mode of the touch panel to set a touch activation region for determining whether the touch panel is touched by analyzing a driving voltage supplied to the first mode sensing electrode and a sensing signal received from the second mode sensing electrode, And a touch sensing unit for sensing whether the touch panel is touched using only the activation drive electrodes and the activation reception electrodes included in the touch activation area among the reception electrodes. The method according to claim 1,
The touch sensing unit senses the touch activation area using a first touch coordinate determined by a touch on the first mode sensing electrode and a second touch coordinate determined by a touch on the second mode sensing electrode, And a display unit for displaying the image. The method according to claim 1,
The receiving electrodes and the driving electrodes are formed in a region of the touch panel corresponding to the display region,
Wherein the first mode sensing electrode and the second mode sensing electrode are formed in an area corresponding to the non-display area of the touch panel. The method according to claim 1,
The touch-
A driving unit including driving electrodes connected to the driving electrodes and the first mode sensing electrode, respectively;
A receiving unit including receiving switches connected to the receiving electrodes and the second mode sensing electrode and determining the touch activation area using the sensing signals received from the receiving electrodes and the second mode sensing electrode; And
And a control unit for controlling the driving switches and the receiving switches to supply the driving voltage to the activation driving electrodes and to receive the sensing signal received from the activation receiving electrodes by the receiving unit. 5. The method of claim 4,
Wherein,
Wherein the first driving signal is supplied to the driving switches during a touch sensing period so that the activation driving electrodes and the first mode sensing electrode can be connected to a driving voltage supply unit for supplying the driving voltage,
And a second synchronizing signal for allowing a sensing signal generated from the activation receiving electrodes and the second mode sensing electrode to be input to the receiving unit during the touch sensing period is supplied to the receiving switches Device. Determining whether an event for selecting a touch activated area is generated from the first mode sensing electrode and the second mode sensing electrode formed in the non-display region of the touch panel;
Setting a touch activation area according to the event; And
And determining whether or not a touch is made in the touch activation area. The method according to claim 6,
Wherein the step of setting the touch activation area according to the event comprises:
The touch activation area is set using at least one of a first touch coordinate determined by a touch on the first mode sensing electrode or a second touch coordinate determined by a touch on the second mode sensing electrode And a display device. The method according to claim 6,
Wherein the step of determining whether or not the touching area is touched includes:
A driving voltage is supplied to the activation driving electrodes included in the touch activation region and the first mode sensing electrode among the driving electrodes formed in the display region of the touch panel, And determines whether or not a touch is made by using the activation receiving electrodes included in the first mode sensing electrode and the sensing signal received from the second mode sensing electrode. The method according to claim 6,
And if the touch is not generated in the touch activated area for a predetermined period of time, setting a default area set as a default to the touch activated area, and then determining whether the default area is touched. 10. The method of claim 9,
Wherein the step of determining whether to touch the default area after setting the default area as the touch activation area comprises:
Determining whether a predetermined period has elapsed after the touch mode is set and the touch mode is not continuously generated and the touch mode is set to the idle mode; And
And determining whether the default region is touched by setting the default region as the touch activation region as a result of the determination.

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