KR102089317B1 - Display device and method of driving the same - Google Patents

Abstract

The present invention relates to a display device and a driving method thereof, in particular, by driving only the driving electrodes and the receiving electrodes included in the touch activation area selected by the user, it is possible to determine whether or not the touch only in the touch activation area, It is a technical problem to provide a display device and a driving method thereof. To this end, the display device according to the present invention includes: a panel including a display area in which an image is output and a non-display area in which an image is not output; A touch panel including receiving electrodes, driving electrodes, a first mode sensing electrode disposed on an outermost side of one side of the driving electrodes, and a second mode sensing electrode disposed on an outermost side of one side of the receiving electrodes; And analyzing a driving voltage supplied to the first mode sensing electrode and a sensing signal received from the second mode sensing electrode, and setting a touch activation area for determining whether to touch among the touch panels, and then driving electrodes and It includes a touch sensing unit for determining whether a touch is performed using only the activation driving electrodes and the activation receiving electrodes included in the touch activation area among the reception electrodes.

Description

Display device and its driving method {DISPLAY DEVICE AND METHOD OF DRIVING THE SAME}

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.

Touch panels include liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting display devices (OLEDs), and electrophoretic displays (EPDs). It is installed on the same display device and is a type of input device that allows a user to input information by directly touching the screen with a finger or pen while viewing the display device.

The touch panel may be attached to the top surface of the panel after being manufactured independently of the panel constituting the display device, or may be integrally formed with the panel.

1 is an exemplary view for explaining a method of driving a conventional touch panel.

The touch panel is for detecting a touch from a user, and may be configured in various forms, such as a resistive film type or a capacitive type. Hereinafter, a touch panel using a capacitive method will be described with reference to FIG. 1.

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 the 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 detecting whether a touch is performed using a detection 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 in the touch panel 40 is applied, the driving voltage is sequentially applied to the driving electrode 11, respectively. While the driving voltage is applied to the driving electrode 11, a sensing signal is received through all the receiving electrodes 21.

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

Currently, since the display device using the touch panel 40 as described above is mostly small, such as a smart phone, tablet PC, laptop, monitor, and the like, the driving electrode 11 formed on the touch panel 40 The number of and the number of the receiving electrodes 21 are not many.

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

In this case, the received signals received during one touch detection period are increased, and accordingly, the computation time for analyzing whether the touch is increased. Therefore, it is not quickly determined whether or not the touch.

In addition, as the number of the driving electrodes 11 and the number of the receiving electrodes 21 increase, the number of driving voltages supplied to the driving electrodes 11 and the reference supplied to the receiving electrodes 21 The number of voltages is increased. Therefore, 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 irrespective of the user's intention may be generated in an area not desired by the user. In this case, the display device may malfunction.

The present invention is to solve the above-described problem, by driving only the driving electrodes and the receiving electrodes included in the touch activation area selected by the user, it is possible to determine whether or not the touch only in the touch activation area, the display device and It is a technical problem to provide the driving method.

To achieve the above object, a display device according to the present invention includes a panel including a display area in which an image is output and a non-display area in which an image is not output; A touch panel including receiving electrodes, driving electrodes, a first mode sensing electrode disposed on an outermost side of one side of the driving electrodes, and a second mode sensing electrode disposed on an outermost side of one side of the receiving electrodes; And analyzing a driving voltage supplied to the first mode sensing electrode and a sensing signal received from the second mode sensing electrode, and setting a touch activation area for determining whether to touch among the touch panels, and then driving electrodes and It includes a touch sensing unit for determining whether a touch is performed using only the activation driving electrodes and the activation receiving electrodes included in the touch activation area among the reception electrodes.

In order to achieve the above object, in the method of driving a display device according to the present invention, an event for selecting a touch activation area is generated from a first mode sensing electrode and a second mode sensing electrode formed in a non-display area of a touch panel. Determining whether or not; Setting a touch activation area according to the event; And determining whether to touch the touch activation area.

According to the present invention, since the user can directly select the touch activation area, touch malfunction in an area not desired by the user can be prevented.

Further, according to the present invention, since the touch is analyzed only in the minimum touch activation area desired by the user, the touch can be quickly determined.

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

1 is an exemplary view for explaining a method of driving a conventional touch panel.
2 is a block diagram of an embodiment of a display device according to the present invention.
3 is an exemplary view showing 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 the configuration of the touch sensing unit applied to the display device according to the present invention.
6 is a flowchart of an embodiment of a method for 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.

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

The display device according to the present invention, as shown in Figures 2 to 5, the panel 100 including a display area (A), and a non-display area (B), the image is not output, the image is output The electrodes RX1 to RXn, the driving electrodes TX1 to TXm, the first mode sensing electrode TX0 disposed at the outermost side of one of the driving electrodes TX1 to TXm, and the receiving electrodes RX1 to RXn), a touch panel 500 having a second mode sensing electrode RX0 disposed on the outermost side of one side, a driving voltage supplied to the first mode sensing electrode TX0, and the second mode sensing electrode ( RX0) by analyzing a detection signal received from the touch panel 500 and setting a touch activation area C to determine whether or not to touch, and then driving electrodes TX1 to TXm and receiving electrodes RX1 To RXn) using only the activation driving electrodes and the activation receiving electrodes included in the touch activation area C. A touch sensing unit 600 for determining whether or not touch is performed, a driving voltage supply unit for generating the driving voltage, and a gate for sequentially supplying gate pulses to gate lines GL1 to GLg formed in the panel 100 The driver 200, the data driver 300 for supplying the data voltage to the data lines DL1 to DLd formed in the panel 100, the gate driver 200, the data driver 300 and the It includes a timing controller 400 for controlling the function of the touch sensing unit 600.

First, the panel 100 may be a liquid crystal panel, an organic light emitting panel, a plasma display panel, or a youngdong display panel.

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

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

For example, when the display device is a liquid crystal display (LCD), the intermediate layer may include 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 description, the present invention will be described by taking the case where the panel 100 is a liquid crystal panel as an example.

When the panel 100 is a liquid crystal panel, the panel 100 may be configured in a form in which 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 intersecting the data lines, and the data line A plurality of thin film transistors (TFTs) formed in pixels formed for each of the crossing regions of the fields DL1 to DLd and the gate lines GL1 to GLg, a plurality for charging the data voltage to the pixel A pixel electrode or the like is formed. That is, pixels are arranged in a matrix form by the crossing 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 (copper filter substrate) of the panel 100. The common electrode is formed on the upper glass substrate GLS1 in a vertical electric field driving method such as a twisted nematic (TN) mode and a vertical alignment (VA) mode, and an in-plane switching (IPS) mode and a fringe field switching (FSF) mode. In the same horizontal electric field driving method, it is formed on the lower glass substrate together with the pixel electrode.

On the other hand, the panel 100 is formed with a display area (A) in which an image is output and a non-display area (B) in which an image is not output, and is formed by the 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 include a display area (A) and a non-display area (displayed on the touch panel 500 shown in FIG. 3). B). 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, and the panel 100 ), The non-display area B is formed at a position corresponding to the non-display area B formed on the touch panel 500 of the panel 100.

Second, the touch panel 500 is a first mode sensing electrode disposed on the outermost side of the receiving electrodes RX1 to RXn, the driving electrodes TX1 to TXm, and the driving electrodes TX1 to TXm. (TX0) and a second mode sensing electrode RX0 disposed on the outermost side of one side of the receiving 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 electrode TX0 and The second mode sensing electrode RX0 is formed in the non-display area 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 it is formed in the non-display area B. In the case of the touch panel 500 illustrated in FIG. 3, since the first mode sensing electrode TX0 is disposed in the non-display area B formed at the bottom of the touch panel 500, the first The driving voltage may be first supplied to the mode sensing electrode TX0, or the driving voltage may be supplied last.

In addition, the second mode sensing electrode RX0 performs the same function as the receiving electrodes RX1 to RXn, except that it is formed in the non-display area B. In the case of the touch panel 500 illustrated 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 to 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 area B of the touch panel 500, and the non-display area B As illustrated in FIG. 4, corresponds to an area in which an image is not displayed on the front surface of the display device.

The non-display area B of the touch panel 500 may be covered by the top case 700 constituting the display device, as shown in FIG. 4, and the top case 700 is the If it is not exposed to the front of the display device, it may be covered by black metrics.

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 included in the top case 700. A first groove 710 to allow exposure to the outside and a second groove 720 to allow the second mode sensing electrode RX0 to be exposed 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 location and set the touch activation area. This will be described in detail with reference to FIG. 6.

The touch panel 500 may be formed independently of the panel 100 and attached to the panel 100 as shown in FIG. 2.

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 a touch is independently performed regardless of driving of the panel 100, the panel 100 includes a liquid crystal panel, an organic light emitting panel, a plasma display panel, and a youngdong display panel. It can be any one of various types of panels. In this case, in the display area A of the touch panel 500, receiving electrodes RX1 to RXn arranged side by side with the data lines and driving electrodes arranged side by side with the gate lines (TX1 to TXm) are formed. In the non-display area B of the touch panel 500, a first mode sensing electrode is disposed on the outermost side of one side of the driving electrodes TX1 to TXm and is arranged in parallel with the driving electrodes. The second mode sensing electrode RX0 is disposed on the outermost side of one side of the TXTX and the receiving electrodes RX1 to RXn, and is arranged in parallel with the receiving electrodes. The receiving electrodes, the second mode sensing electrode, and the driving electrodes and the first mode sensing electrode are insulated by an insulator.

Further, the touch panel 500 may be formed in a form 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 are applied to the panel 100 with a common voltage and a driving voltage. It performs the function of feeding alternately. That is, in this case, since 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 detection 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 may be applied in addition to the liquid crystal panel. When the touch panel 500 is embedded in the panel 100, the touch panel may be configured as a hybrid in-cell type or an in-cell type.

The hybrid in-cell type touch panel 500 is disposed on the first substrate (TFT substrate) or the second substrate (color filter substrate), and in parallel with the plurality of gate lines formed on the first substrate. The driving electrodes TX1 to TXm, the first mode sensing electrode TX0, and the upper surfaces of the second substrate (color filter substrate) are disposed on the driving electrodes and the first mode sensing electrode. It may include receiving electrodes RX1 to RXn and a second mode sensing electrode RX0 disposed with an insulating layer between (TX0). 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 in-cell type touch panel 500 includes the driving electrodes TX1 to TXm, the receiving electrodes RX1 to RXn, and the first mode sensing electrode formed on the first substrate (TFT substrate). 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 the first substrate TFT Substrate). In particular, the driving electrodes and the receiving electrodes may be formed on the same layer on the first substrate. In this case, in the region where the driving electrode and the receiving electrode intersect, since either the driving electrode or the receiving electrode is connected to another layer through a contact hole, the driving electrode and the receiving electrode are substantially Is not contacted. The driving electrodes and the receiving electrodes, which satisfy the above-described structure, may be formed in various ways on the TFT substrate.

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, integrally with the panel 100. Although it may be formed, for convenience of description, the present invention will be described with the touch panel 500 formed independently of the panel 100 as an example. That is, the contents described below may be applied to the display device composed of the hybrid in-cell type or the in-cell type touch panel 500 as it is.

Third, the timing controller 400 receives timing signals such as a data enable signal (DE) and a dot clock (CLK) from an external system and operates the data driver 300 and the gate driver 200 Control signals (GCS, DCS) for controlling timing are generated. 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 includes a gate start pulse GSP, a gate shift clock GSC, a gate output enable signal GOE, or the like, or a start signal ( VST) and gate clock (GCLK).

In addition, the timing controller 400 controls the data driver 300 and the gate driver 200, and also generates control signals for controlling the operation timing of the input and output of the touch sensing unit 600. By doing so, the touch sensing unit 600 may be controlled.

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

The timing controller 400 rearranges the 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. This function can be executed in the data alignment unit.

The timing controller 400 uses timing signals transmitted from the external system, that is, dot clock CLK, vertical sync signal Vsync, horizontal sync signal Hsync, and data enable signal DE. , Generating a data control signal (DCS) for controlling the data driver 300 and a gate control signal (GCS) for controlling the gate driver 200 embedded in the panel, and controlling the control signals to the data driver 300 And transmits the data to the gate driver 200. Such a function may be executed in the control signal generator.

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

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

The data driver 300 shifts a source start pulse (SSP) from the timing controller 400 according to a source shift clock (SSC) to generate a sampling signal. Then, 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 it to a data voltage, and then enables the source output. In response to a (Source Output Enable; SOE) signal, the data voltage is supplied to the data lines in units of horizontal lines.

To this end, the data driver 300 may include a shift register unit, a latch unit, a digital-to-analog conversion unit, 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 to the digital-to-analog converter (DAC).

The digital-to-analog converter converts and outputs the image data transmitted from the latch to a positive or negative data voltage at the same time. That is, the digital-to-analog converter converts the image data according to the polarity control signal (POL) transmitted from the timing controller 400 by using the gamma voltage supplied from the gamma voltage generator (not shown). It is converted to a data voltage of polarity or negative polarity and output to the data lines.

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

Fifth, the gate driver 200 shifts a gate start pulse (GSP) transmitted from the timing controller 400 according to a gate shift clock (GSC), sequentially the gate lines A scan signal having a gate-on voltage Von is supplied to (GL1 to GLg). In addition, the gate driver 200 supplies the gate-off voltage Voff to the gate lines GL1 to GLn during the remaining period when the scan signal of the gate-on voltage Von is not supplied.

The gate driver 200 applied to the present invention is formed to be independent of the panel 100, and may be configured in a form that can be electrically connected to the panel 100 in various ways, but the panel 100 It may be configured in a gate-in-panel (GIP) method mounted therein. In this case, the gate control signal for controlling the gate driver 200 may be a start signal (VST) and a gate clock (GCLK).

Further, in the above description, the data driver 300, the gate driver 200, and the timing controller 400 have been described as independently configured, but at least one of the data driver 300 or the gate driver 200 is described. Any one may be integrally configured with the timing controller 400.

Sixth, the driving voltage supply unit 640 generates driving voltages 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 supply unit 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 supply unit 640 may generate the driving voltage in the form of a pulse by using a maximum voltage VH and a minimum voltage VL supplied from an unshown power supply unit.

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 illustrated in FIG. 5.

In addition, although not illustrated in the drawing, 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 may be formed independently of the touch sensing unit 600.

In addition, although not illustrated in the drawing, the display device illustrated in FIG. 2 may include a reference voltage supply unit for supplying a reference voltage to the touch sensing unit 600. The reference voltage Vref is supplied to the receiving unit 620 included in the touch sensing unit 600, but since the receiving unit 620 is connected to the receiving electrodes 121, during the touch sensing period, The voltage corresponding to the reference voltage is applied to the receiving electrodes by the reference voltage supplied to the receiving unit 620.

The reception unit 620 determines whether the touch panel 500 is touched using the reference voltage Vref and the detection signal received from the reception 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 function of sensing a touch using sensing signals (voltage values) received from the receiving electrodes RX1 to RXn and the second mode sensing electrode RX0. do.

That is, in a state in which driving voltages for touch detection are sequentially applied to the driving electrodes TX1 to TXm and the first mode sensing electrode TX0, a user may use the finger or pen to touch the touch panel 500. When a specific area is touched, the capacitance between the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn is changed, and the change in the capacitance is from the receiving electrodes RX1 to RXn. The voltage value (sensing signal) transmitted to the touch sensing unit 600 is changed.

The receiving electrodes RX1 to RXn are connected to the touch sensing unit 600, and the touch sensing unit 600 uses the changed voltage value (sensing signal) as described above, so that the touch panel 500 It judges whether or not to touch.

In particular, the touch sensing unit 600 analyzes the driving voltage supplied to the first mode sensing electrode TX0 and the detection signal received from the second mode sensing electrode RX0, and the touch panel 500. After setting a touch activation region to determine whether or not to touch, among the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn, activation driving electrodes and activation reception included in the touch activation region It is determined whether or not the touch is performed using only the electrodes.

That is, the touch sensing unit 600 includes first touch coordinates determined by a touch on the first mode sensing electrode TX0, and first touch coordinates determined by a touch on the second mode sensing electrode RX0. After setting the touch activation area using 2 touch coordinates, it is determined whether or not the touch is activated only in the touch activation area.

To this end, the touch sensing unit 600, as shown in Figure 5, the driving electrodes (TX1 to TXm) and the first mode sensing electrode (TX0) connected to each of the driving switches (611) It includes a driving unit 610, receiving electrodes (RX1 to RXn) and receiving switches 621 connected to each of the second mode sensing electrode (RX0), the receiving electrodes (RX1 to RXn) And a receiver 620 determining the touch activation area C and the driving switches 611 and the receiving switches 621 using the sensing signal received from the second mode sensing electrode RX0. In order to supply the driving voltage only to the activation driving electrodes included in the touch activation area C, the detection signal received from the activation receiving electrodes included in the touch activation area is received by the reception unit 620. It includes a control unit 630.

First, during the touch detection period, the driving unit 610 receives the driving voltage supplied from the driving voltage supply unit 640 according to the control signal supplied from the control unit 630 through the driving switches 611. It is supplied to the driving electrodes TX1 to TXm. That is, the control unit 630 receives the control signal for connecting all of the driving switches 611 to the driving voltage supply unit 640 according to the touch sensing period control signal transmitted from the timing controller 400. It is transmitted to the drive switches 611. The driving switches 611 are turned on according to the control signal transmitted from the control unit 630, the driving voltage supply unit 640, the driving electrodes TX1 to TXm, and the first mode detection electrode TX0 ).

However, a first synchronization 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 driven from the control unit 630. When supplied to the switches 611, 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.

That is, during the touch detection period, the driving unit 610 turns on all the driving switches 611 according to a control signal transmitted from the control unit 630 to turn on all the driving electrodes TX1 to TXm and The driving voltage is supplied to the first mode sensing electrode. In addition, according to the control signal, the driving unit 610 turns on only some of the driving switches of the driving switches 611, so that the driving voltage is only the active driving electrodes connected to the turned on driving switches. Supplies.

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

Next, the receiving unit 620 includes receiving switches 621 connected to each of the receiving electrodes RX1 to RXn and the second mode sensing electrode RX0, and the receiving electrodes RX1 to RXn) and the second mode sensing electrode RX0 using the detection signal received to determine the touch activation area C.

To this end, the receiving unit 620, as shown in Figure 5, includes the receiving switch 621 and the touch position determining unit 622.

The reception switches 621 are turned on according to a control signal transmitted from the control unit 630 during the touch detection period, from the reception electrodes RX1 to RXn and the second mode detection electrode RX0. The received detection signals are transmitted to the touch position determination unit 622.

However, a second synchronizing signal that enables detection signals generated from the activation receiving electrodes included in the touch activation area to be input to the touch position determination unit 622, the reception switches from the control unit 630. When supplied to (621), the receiving switches 621 connected to the active receiving electrodes are turned on to connect the touch position determining unit 622 and the active receiving electrodes.

That is, during the touch detection period, the reception unit 620 turns on all of the reception switches 621 according to the control signal transmitted from the control unit 630, so that all of the reception electrodes RX1 to RXn are turned on. The transmitted detection signals are transmitted to the touch position determination unit 622. In addition, the receiving unit 620, according to the control signal, by turning on some of the receiving switches of the receiving switch 621, the sensing received from the activated receiving electrode connected to the turned on receiving switch The signal may be transmitted to the touch position determination unit 622.

Among the receiving switches 621, the receiving switch connecting the second mode sensing electrode RX0 and the touch position determining unit 622 is always in contact with the touch position determining unit 622 during the touch sensing period. The second mode sensing electrode RX0 is connected. Accordingly, the detection signal is continuously supplied from the second mode detection electrode RX0 to the touch position determination unit 622 during the touch detection period.

Finally, the control unit 630, when the control signal indicating the touch detection period is received from the timing controller 400, the control signal for connecting the drive switches 611 to the drive voltage supply unit 640 To the drive switches 611.

When the information indicating that the touch activation area has been set is received from the touch position determination unit 622, the control unit 630 includes the activation driving electrodes included in the touch activation area C, and the driving voltage supply unit 640. A first synchronous signal to be connected to the first switch is supplied to the driving switches 611. According to 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.

The control unit 630 receives the information that the touch activation area is set from the touch position determination unit 622, the detection signal generated from the activation receiving electrodes included in the touch activation area, the touch position determination unit A second synchronous signal to be input to 622 is supplied to the receiving switches 621. According to the second synchronization signal, the receiving switches 621 connected to the active receiving electrodes are turned on to connect the touch position determining unit 622 and the active receiving electrodes.

When the touch activation area set in the above is released, the control unit 630 sets the default area set as default as the touch activation area, and then determines whether or not the touch is activated in the default area.

Among the components constituting the touch sensing unit 600, the touch position determining unit 622 and the control unit 630 may be formed on the timing controller 400 or a separate component. That is, the receiver 600 determines whether a touch is performed by using the sensing signals received from the touch panel 500, and when a touch is detected, the sensing signals or touch position information analyzed from the sensing signals To the timing controller 400 or the separate component. In this case, the timing controller 400 or the separate component may determine the location of the touch using the touch location information, and set the touch activation area according to the determination result. The timing controller 400 Ehsms The separate components may generate the first synchronous signal and the second synchronous signal according to the touch activation area, and transmit them to the driver 610 and the receiver 620. .

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

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

6, the first mode sensing electrode TX0 and the second mode formed in the non-display area B of the touch panel 500, as shown in FIG. 6. Determining whether an event for selecting the touch activation area has occurred from the sensing electrode RX0 (S102), after setting a touch activation area according to the event, determining whether or not a touch is in the touch activation area Step (S104) and for a period of time, if a touch is not generated in the touch activation area (S106), after setting the default default setting area to the touch activation area (S108), whether or not touch is performed in the default area It includes the step of determining (S110).

First, when the display device is driven, the display device outputs an image through the panel 100 during an image display period, and detects whether a touch is performed through the touch panel 500 during a touch detection period.

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

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

Next, an event for selecting the touch activation area is generated 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. In the step (S102) of determining whether it has occurred, the touch position determination unit 622 detects the first mode detection electrode TX0 and the second mode of the touch panel 500 during the touch detection period. It is determined whether a touch has occurred 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 to TXm.

In this case, in the display device as shown in FIG. 4, when a user touches the first groove 710 or the second groove 720, the position corresponding to the first mode sensing electrode TX0 or the The touch is sensed at a position corresponding to the second mode sensing electrode RX0.

The touch position determining unit 622 determines whether or not the event in which a touch is detected is generated at a position corresponding to the first mode sensing electrode TX0 or 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, the first touch determined by the touch on the first mode detection electrode (TX0) The touch activation area C is set 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 illustrated in FIG. 4, it is detected that there is a touch at the first position on the second mode sensing electrode, and within a predetermined time, the second position on the second mode sensing electrode and the first mode When it is sensed that there is a touch at the third position on the sensing electrode, the touch position determination unit 622 or the control unit 630 includes coordinates (T1) corresponding to the first position and coordinates corresponding to the second position. The touch activation area C is set using (T2) and coordinates T3 corresponding to the third position.

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

When the coordinates of the touch sensed on the first mode sensing electrode TX0 are referred to as the first touch coordinates, the first touch coordinates include the third position T3.

When the coordinates of the touch sensed on the second mode sensing electrode RX0 are referred to as the second touch coordinates, the second touch coordinates include the first position T1 and the second position T2.

The first touch coordinate may include one or two touch locations, and the second touch coordinate may also include one or two touch locations. In the example as illustrated in FIG. 4, the first touch coordinate includes one touch position T3, and the second touch coordinate includes 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, the touch position determination unit 622 or the control unit 630 is surrounded by the first touch coordinates (T3) and the second touch coordinates (T1, T2), as shown in FIG. An area is set 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.

For example, in FIG. 4, when a touch is detected only in the first position T1 and the second position T2 on the second mode sensing electrode RX0, the touch position determination unit 622 or The control unit 630 may set an area surrounded by the second touch coordinates T1 and T2 as the touch activation area C.

On the other hand, if it is determined that no touch has occurred from the first mode sensing electrode TX0 and the second mode sensing electrode TX0, the touch position determination unit 622 or the control unit 630 is set to a default value. ) Is set as the touch activation area C.

The default area may be the entire display area A of the display device illustrated 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 may set the default area by analyzing the type, size and use of the display device, and touch application programs applied to the display device. Information about the default area may be stored in the touch position determination unit 622, the control unit 630, or the timing controller 400. Hereinafter, the present invention will be described as an example in which the touch activation area is set by a user touching at least one of the first mode sensing electrode TX0 and the second mode sensing electrode RX0.

Next, in step S104 of determining whether a touch is in the touch activation area, activation driving included in the touch activation area C among driving electrodes formed in the display area of the touch panel 100 is performed. A driving voltage is supplied to the electrodes and the first mode sensing electrode TX0, and sensing received from the active receiving electrodes included in the touch activation area and the second mode sensing electrode RX0 among the receiving electrodes. The signal is used to determine whether or not the touch has occurred.

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 the activation receiving electrodes included in the touch activation area By receiving only the detection signal received from, it is determined whether the touch and the touch position in the touch activation area (C).

To this end, 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, as described above, the driving voltage is continuously applied to the first mode sensing electrode TX0. This is supplied, and the detection signal transmitted from the second mode detection electrode RX0 is continuously received by the reception unit 620.

Finally, after a touch is detected in the first mode sensing electrode TX0 and the second mode sensing electrode RX0, after the touch activation area is set (S102, S104), for a period of time, the touch activation area If a touch does not occur (S106), the default area, which is set as the default, is set as the touch activation area (S108), and it is determined whether or not the touch occurs in the default area (S110).

That is, as described above, when the display area (A) or a portion of the display area (A) of the touch panel 500 is set as the default area, when the event as described above occurs, the event The touch activation area C is set.

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

Accordingly, in this case, the present invention, after releasing the touch activation area C set by the user, sets the default area as the touch activation area, and determines whether or not touch and touch position in the default area. .

To this end, the touch position determining unit 622 or the control unit 630, when a touch is not continuously generated while the touch activation area is set, idles the mode of the touch panel 500. ) Mode.

Here, the idle mode is a mode generated when a touch is not generated until a predetermined period of time elapses from the touch panel 500, and is a mode for releasing the touch activation area. That is, after the touch activation area C is set, if no touch occurs until a preset period of time elapses from the touch panel 500, 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 or not a predetermined period has elapsed again (S106).

That is, the present invention determines whether a predetermined period has elapsed again after switching to the idle mode so as to give a sufficient time to the user.

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

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

The present invention as described above, by allowing the user to directly select an area capable of sensing a touch among the touch panel 500, so that the touch panel 500 and the display device can be driven efficiently.

The display device and the driving method according to the present invention as described above are 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 touch panel is enlarged, an area in which touch is unnecessary among the touch panels may be generated according to a user's usage method or characteristics 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 writing area for inputting various information, and a touch panel is provided but used for display In a large display device, a touch may be unnecessary. In this case, a touch may be generated in an area where touch is unnecessary, and thus the display device may malfunction, and power consumption may increase due to unnecessary touch.

To solve this, the present invention allows the user to dynamically designate an area in which a touch is desired to be driven. 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 to the non-display area, and the first mode sensing electrode or the second mode is added. When an event occurs in at least one of the sensing electrodes, a touch activation 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. Further, according to the present invention, since the driving voltage for sensing the touch is supplied only to the activation driving electrodes included in the touch activation area, power consumption of the display device can be reduced.

Those skilled in the art to which the present invention pertains will appreciate that the present invention may be implemented in other specific forms without changing its technical spirit or essential characteristics. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. do.

100: panel 200: gate driver
300: data driver 400: timing controller
600: touch sensing unit 610: driving unit
620: receiving unit 630: control unit
611: drive switch 622: receiving switch
640: drive voltage supply

Claims (10)

A panel including a display area in which an image is output and a non-display area in which an image is not output;
A touch panel including receiving electrodes, driving electrodes, a first mode sensing electrode disposed on an outermost side of one side of the driving electrodes, and a second mode sensing electrode disposed on an outermost side of one side of the receiving electrodes; And
After analyzing a driving voltage supplied to the first mode sensing electrode and a sensing signal received from the second mode sensing electrode, after setting a touch activation area to determine whether to touch among the touch panels, the driving electrodes and the It includes a touch sensing unit for determining whether the touch using only the active driving electrode and the active receiving electrode included in the touch activation region of the receiving electrode,
The first mode sensing electrode is disposed in a first area of the non-display area, and the second mode sensing electrode is disposed in a second area of the non-display area. According to claim 1,
The touch sensing unit uses the first touch coordinates determined by the touch on the first mode sensing electrode and the second touch coordinates determined by the touch on the second mode sensing electrode, to activate the touch activation area. Display device characterized in that to set. According to claim 1,
The receiving electrodes and the driving electrodes are formed in an area corresponding to the display area of the touch panel,
The first mode sensing electrode and the second mode sensing electrode are formed on a region corresponding to the non-display area of the touch panel. According to claim 1,
The touch sensing unit,
A driving unit including driving switches connected to each of the driving electrodes and the first mode sensing electrode;
A receiving unit connected to each of the receiving electrodes and the second mode sensing electrode, and determining a 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 a detection signal received from the activation receiving electrodes to the reception unit. The method of claim 4,
The control unit,
During the touch sensing period, the first driving signal and the first mode sensing electrode are supplied to the driving switches so as to be connected to a driving voltage supply unit supplying the driving voltage to the driving switches,
During the touch detection period, a display characterized by supplying a second synchronization signal to the reception switches to enable a detection signal generated from the active reception electrodes and the second mode detection electrode to be input to the reception unit Device. Determining whether an event for selecting a touch activation area has occurred from the first mode sensing electrode and the second mode sensing electrode formed in the non-display area of the touch panel;
Setting a touch activation area according to the event; And
And determining whether to touch the touch activation area,
The first mode sensing electrode is disposed in a first area of the non-display area, and the second mode sensing electrode is disposed in a second area of the non-display area. The method of claim 6,
Setting the touch activation area according to the event,
Setting the touch activation area by 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 Method of driving a display device, characterized in that. The method of claim 6,
Determining whether to touch only in the touch activation area,
Of the driving electrodes formed in the display area of the touch panel, a driving voltage is supplied to the activation driving electrodes included in the touch activation area and the first mode sensing electrode, and to the touch activation area of the receiving electrodes. A method of driving a display device, comprising determining whether a touch is performed by using the included active receiving electrodes and a sensing signal received from the second mode sensing electrode. The method of claim 6,
And if a touch is not generated in the touch activation area for a period of time, setting a default area that is set as a default as the touch activation area, and then determining whether a touch is performed in the default area. The method of claim 9,
After setting the default area as the touch activation area, determining whether to touch the default area is:
Determining whether a predetermined period has elapsed after entering the idle mode because the touch is not continuously generated while the touch activation area is set; And
And as a result of the determination, when a preset period of time has elapsed, setting a default area as the touch activation area and determining whether to touch the default area.

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