Touch Display Device and Driving Method of the same

Abstract

The present invention may provide a touch display device comprising: a display panel including a subpixel; a touch sensor including a touch electrode provided based on the electrode of a light-emitting diode included in the subpixel; and a touch driving unit sensing the touch sensor, wherein the touch driving unit utilizes a signal line connected to the subpixel as a touch electrode during the light emission period of the light-emitting diode.

Description

Technology Field

[0001] The present invention relates to a touch display device and a method for driving the same. Background Technology

[0002] As information technology advances, the market for display devices, which serve as a medium connecting users and information, is growing. Consequently, the use of display devices such as Light Emitting Display Devices (LEDs), Quantum Dot Display Devices (QDDs), and Liquid Crystal Display Devices (LCDs) is increasing.

[0003] The display devices described above include a display panel containing subpixels, a driving unit that outputs a driving signal for driving the display panel, and a power supply unit that generates power to be supplied to the display panel or the driving unit.

[0004] The above display devices can display an image when driving signals, such as scan signals and data signals, are supplied to subpixels formed on a display panel, causing selected subpixels to transmit light or emit light directly. In addition, the above display devices can receive user input in the form of touch based on a touch sensor and execute commands corresponding to the touch input. The problem to be solved

[0005] The present invention enables the sensing operation of a touch sensor to be performed together with the image display operation (light emission operation) of a display panel, thereby reducing noise generated due to interference from other signals or voltages during operation preparation and improving the sensing sensitivity of the touch sensor. means of solving the problem

[0006] The present invention may provide a touch display device comprising: a display panel including a subpixel; a touch sensor including a touch electrode provided based on the electrode of a light-emitting diode included in the subpixel; and a touch driving unit sensing the touch sensor, wherein the touch driving unit utilizes a signal line connected to the subpixel as a touch electrode during the light emission period of the light-emitting diode.

[0007] The above signal line may include a data line and a scan line connected to the above subpixel.

[0008] The touch driving unit can apply a touch driving voltage through one of the data line or the scan line.

[0009] The touch driving unit applies a touch driving voltage through the scan line, wherein the touch driving voltage may be a pulse consisting of a voltage level capable of turning off a transistor connected to the scan line.

[0010] The touch driving unit can apply a touch driving voltage through a data line connected to the subpixel during the light emission period of the light-emitting diode and sense the cathode electrode of the light-emitting diode to detect whether the touch sensor is touched.

[0011] The touch driving unit can apply a touch driving voltage through a data line connected to the subpixel during the light emission period of the light-emitting diode and sense a touch electrode on a sealing layer covering the cathode electrode of the light-emitting diode to detect whether the touch sensor is touched.

[0012] The touch driving unit applies a touch driving voltage through the N-1 scan line connected to the subpixel during the light emission period of the light-emitting diode and senses the data line connected to the subpixel to detect whether the touch sensor is touched, and the transistor connected to the N-1 scan line can control whether the gate electrode of the driving transistor included in the subpixel is initialized.

[0013] The touch driving unit applies a touch driving voltage through an N-scan line connected to a subpixel during the light emission period of the light-emitting diode and senses a data line connected to the subpixel to detect whether the touch sensor is touched, and the transistor connected to the N-scan line can control whether the anode electrode of the light-emitting diode is initialized.

[0014] The above subpixel includes a light-emitting control transistor that controls the light-emitting period of the light-emitting diode, and the touch driver can operate to detect whether there is a touch during the period when the light-emitting control transistor is turned on.

[0015] In another aspect, the present invention may provide a method for driving a touch display device comprising a display panel including a subpixel, a touch sensor including a touch electrode provided based on the electrode of a light-emitting diode included in the subpixel, and a touch driving unit for sensing the touch sensor. The method for driving a touch display device includes a programming step of applying a data voltage to the subpixel and a light emission and sensing step of emitting light from the light-emitting diode based on the data voltage applied to the subpixel, and simultaneously applying a touch driving voltage to the touch sensor and sensing, wherein the period of emitting light from the light-emitting diode and the period of sensing the touch sensor may occur together in a single period.

[0016] The touch driving voltage can be applied through one of the data line or scan line connected to the subpixel.

[0017] The touch driving voltage applied through the scan line may be a pulse consisting of a voltage level capable of turning off a transistor connected to the scan line. Effects of the invention

[0018] Since the sensing operation of the touch sensor is performed in conjunction with the image display operation (light emission operation) of the display panel, the present invention has the effect of reducing noise generated due to interference from other signals or voltages during operation preparation and improving the sensing sensitivity of the touch sensor. Furthermore, the present invention has the effect of providing a touch display device that is free from constraints such as design or operating environments that may be induced when implementing a touch sensor through a series of processes involved in the manufacturing of the display panel. Brief explanation of the drawing

[0019] FIG. 1 is a block diagram schematically showing a light-emitting display device of the present invention, and FIG. 2 is a configuration diagram schematically showing a subpixel shown in FIG. 1. FIGS. 3 to 5 are block diagrams for schematically explaining a touch display device. FIG. 6 is a block diagram schematically showing a touch display device according to a first embodiment of the present invention, FIG. 7 is a diagram for explaining data driving and touch driving according to a first embodiment of the present invention, and FIG. 8 and FIG. 9 are diagrams for explaining a part of a touch display device according to a first embodiment of the present invention and a driving method thereof. FIGS. 10 and 11 are drawings for explaining a part of a touch display device and a driving method thereof according to a second embodiment of the present invention, and FIGS. 12 to 15 are drawings for showing step-by-step operation of a touch display device according to a second embodiment of the present invention. FIGS. 16 to 18 are drawings for explaining a part of a touch display device and a driving method thereof according to a third embodiment of the present invention. FIGS. 19 and 20 are drawings for explaining a part of a touch display device and a driving method thereof according to a third embodiment of the present invention in more detail. FIGS. 21 and 22 are drawings for explaining a part of a touch display device and a driving method thereof according to a fourth embodiment of the present invention. FIGS. 23 and 24 are drawings for more specifically explaining a part of a touch display device and a driving method thereof according to a fifth embodiment of the present invention. FIGS. 25 and 26 are drawings for explaining a part of a touch display device and a driving method thereof according to a sixth embodiment of the present invention, and FIGS. 27 and 28 are drawings for explaining a part of a touch display device and a driving method thereof according to a sixth embodiment of the present invention in more detail. FIGS. 29 and FIGS. 30 are exemplary diagrams showing the use of a scan line as a first touch electrode among embodiments of the present invention. FIGS. 31 to 33 are drawings for explaining a part of a touch display device and a driving method thereof according to the seventh embodiment of the present invention. Specific details for implementing the invention

[0020] The touch display device according to the present invention receives user input in the form of a touch based on a touch sensor and can execute a command corresponding to the touch input. The touch display device may be implemented in a television, video player, personal computer (PC), home theater, automotive electrical system, smartphone, etc., but is not limited thereto.

[0021] The touch display device according to the present invention may be implemented as a light-emitting display device (LED), a quantum dot display device (QDD), a liquid crystal display device (LCD), etc. However, for convenience of explanation, a light-emitting display device that directly emits light based on an inorganic light-emitting diode or an organic light-emitting diode is used as an example below.

[0022] In addition, various methods can be applied to touch sensors, such as the mutual-capacitance method, which detects changes in capacitance (detection of touch presence or absence) based on two touch electrodes. However, for the convenience of explanation, the mutual-capacitance method is used as an example below.

[0023] FIG. 1 is a block diagram schematically showing a light-emitting display device of the present invention, and FIG. 2 is a configuration diagram schematically showing a subpixel shown in FIG. 1.

[0024] As illustrated in FIGS. 1 and 2, the light-emitting display device may include an image supply unit (110), a timing control unit (120), a scan driving unit (130), a data driving unit (140), a display panel (150), and a power supply unit (180), etc.

[0025] The video supply unit (110) (or host system) can output various driving signals along with video data signals supplied from the outside or video data signals stored in internal memory. The video supply unit (110) can supply the data signals and various driving signals to the timing control unit (120).

[0026] The timing control unit (120) can output a gate timing control signal (GDC) for controlling the operation timing of the scan drive unit (130), a data timing control signal (DDC) for controlling the operation timing of the data drive unit (140), and various synchronization signals (Vsync, a vertical synchronization signal, Hsync, a horizontal synchronization signal). The timing control unit (120) can supply a data signal (DATA) supplied from the image supply unit (110) to the data drive unit (140) along with the data timing control signal (DDC). The timing control unit (120) may be formed in the form of an IC (Integrated Circuit) and mounted on a printed circuit board, but is not limited thereto.

[0027] The scan driver (130) can output a scan signal (or scan voltage) in response to a gate timing control signal (GDC) supplied from the timing control unit (120). The scan driver (130) can supply a scan signal to subpixels included in the display panel (150) through gate lines (GL1~GLm). The scan driver (130) may be formed in the form of an IC or formed directly on the display panel (150) in a Gate In Panel manner, but is not limited thereto.

[0028] The data driver (140) can sample and latch a data signal (DATA) in response to a data timing control signal (DDC) supplied from the timing control unit (120), and convert the digital data signal into an analog data voltage based on a gamma reference voltage and output it. The data driver (140) can supply the data voltage to subpixels included in the display panel (150) through data lines (DL1~DLn). The data driver (140) may be formed in the form of an IC and mounted on the display panel (150) or mounted on a printed circuit board, but is not limited thereto.

[0029] The power supply unit (180) can generate a first power supply of high potential and a second power supply of low potential based on an external input voltage supplied from the outside, and output them through the first power line (EVDD) and the second power line (EVSS). The power supply unit (180) can generate and output not only the first power supply and the second power supply, but also voltages required for driving the scan drive unit (130) (e.g., gate voltage including gate high voltage and gate low voltage) or voltages required for driving the data drive unit (140) (drain voltage including drain voltage and half-drain voltage), etc.

[0030] The display panel (150) can display an image in response to a driving signal including a scan signal and a data voltage, a first power source, a second power source, etc. The subpixels of the display panel (150) emit light directly. The display panel (150) can be manufactured based on a substrate having rigidity or flexibility, such as glass, silicon, or polyimide. The light-emitting subpixels may consist of pixels including red, green, and blue, or pixels including red, green, blue, and white.

[0031] For example, a single subpixel (SP) may be connected to a first gate line (GL1), a first data line (DL1), a first power line (EVDD), and a second power line (EVSS). The subpixel (SP) may include a pixel circuit composed of a switching transistor, a driving transistor, a capacitor, an organic light-emitting diode, etc. Since the subpixel (SP) used in a light-emitting display device directly emits light, the circuit configuration is complex. In addition, there are various compensation circuits to compensate for the degradation of the organic light-emitting diode that emits light, as well as the driving transistor that supplies driving current to the organic light-emitting diode. Therefore, it should be noted that the subpixel (SP) is simply illustrated in the form of a block.

[0032] Meanwhile, in the above description, the timing control unit (120), scan driving unit (130), and data driving unit (140) were described as being separate components. However, depending on the implementation method of the light-emitting display device, one or more of the timing control unit (120), scan driving unit (130), and data driving unit (140) may be integrated into a single IC.

[0033] FIGS. 3 to 5 are block diagrams for schematically explaining a touch display device.

[0034] As illustrated in FIGS. 3 and 4, the touch display device may include a display panel (150; PNL), a touch sensor (155; TSP), a data driver (140; DIC), and a touch driver (145; ROIC) (read-out circuit or sensing circuit), etc.

[0035] The touch sensor (155) is an input device capable of receiving user input via touch and can be positioned together with a display panel (150) that displays images. More specifically, the touch sensor (155) can be implemented as a first type (In-cell type) in which first and second touch electrodes are placed inside the display panel (150) through a series of processes involved in the manufacturing of the display panel (150). Additionally, the touch sensor (155) can be implemented as a second type (ToE type) in which a first touch electrode is placed inside the display panel (150) and a second touch electrode is placed on a sealing layer covering the display area of ​​the display panel (150) through a series of processes involved in the manufacturing of the display panel (150). That is, the touch electrodes of the touch sensor (155) can be integrated with the display panel (150).

[0036] The touch driving unit (145) can detect whether a touch is present on the display panel (150) and input location information based on the process of sensing after applying a touch driving voltage (touch driving pulse) through the touch electrodes included in the touch sensor (155). The touch driving unit (145) operates together with the touch sensor (155) and can sense finger touch (or pen touch) by the user.

[0037] As illustrated in FIGS. 4 and 5, the touch driver (145; ROIC) can be implemented in various forms, such as being implemented as an IC separated from the data driver (140) or included inside the data driver (140), depending on the implementation method of the display panel (150) and the touch sensor (155). Hereinafter, for convenience of explanation, a structure in which the touch driver (ROIC) is included inside the data driver (140) as shown in FIG. 5 will be described as an example, and the name of this device will be designated as an integrated driver (140).

[0038] FIG. 6 is a block diagram schematically showing a touch display device according to a first embodiment of the present invention, FIG. 7 is a diagram for explaining data driving and touch driving according to a first embodiment of the present invention, and FIG. 8 and FIG. 9 are diagrams for explaining a part of a touch display device according to a first embodiment of the present invention and a driving method thereof.

[0039] As illustrated in FIGS. 6 and 7, the touch sensor (155) may have a plurality of first touch electrodes (TX) and a plurality of second touch electrodes (RX) and may be placed inside a display panel (150). The first touch electrodes (TX) and the second touch electrodes (RX) may be arranged to intersect each other within a display area (AA). The first touch electrode (TX) may be defined as an electrode (transmitting electrode) that receives a touch driving voltage, and the second touch electrode (RX) may be defined as an electrode (receiving electrode) for sensing whether touch sensing is occurring based on a change in capacitance together with the first touch electrode (TX).

[0040] A plurality of first touch electrodes (TX) may be electrically connected to the output channel of a touch driver (145; ROIC) through a plurality of first touch sensing lines (TXL), and a plurality of second touch electrodes (RX) may be electrically connected to the input channel of a touch driver (145) through a plurality of second touch sensing lines (RXL). One or more touch drivers (145) may be arranged depending on the size of the touch sensor (155).

[0041] At least one of the first touch electrode (TX) and the second touch electrode (RX) can be implemented based on an electrode or line disposed inside the display panel (150). That is, at least one of the first touch electrode (TX) and the second touch electrode (RX) can share an electrode or line disposed inside the display panel (150).

[0042] As a result, the driving period of the data driver (DIC) for applying a data voltage to the display panel (150) and the driving period of the touch driver (ROIC) for applying a touch driving voltage to the touch sensor (TSP) and sensing can be distinguished within a 1 Frame period. The period for preparing to apply a data voltage to the display panel (150) and emit light can be defined as a programming period. And the period for applying a touch driving voltage to the touch sensor (TSP) and sensing can be defined as an emitting and sensing period.

[0043] During the emitting and sensing period, an emitting operation for displaying an image on the display panel (150) and a touch sensing operation for sensing whether the touch sensor (TSP) is touched may occur together. As such, the detailed structure for the emitting and sensing to occur together in a single period is described as follows.

[0044] As illustrated in FIGS. 8 and 9, one subpixel (SP) may be connected to a first power line (EVDD), a second power line (EVSS), a first data line (DL1), and a first gate line (GL1). The first gate line (GL1) may include an Nth scan line (SCAN[n]) that transmits a scan signal for applying a data voltage (Vdata) and an Nth light emission control line (EM[n]) that transmits an Nth light emission control signal (Em[n]) for controlling the light emission of an organic light-emitting diode (OLED).

[0045] A single subpixel (SP) may include an organic light-emitting diode (OLED) that emits light. The cathode electrode (CAT) of the organic light-emitting diode (OLED) may be electrically connected to a second power line (EVSS) through a contact hole (CNT). For the sake of understanding, the contact hole (CNT) is shown as being placed inside the subpixel (SP) as an example, but this is for the sake of understanding only and is not limited thereto.

[0046] The integrated driving unit (140) may be implemented to include a data driving unit (DIC) and a touch driving unit (ROIC). The first data line (DL1) connected to the integrated driving unit (140) may be utilized (switched in use) as a first touch electrode (TX) to apply a touch driving voltage (Tx) after a programming period for applying a data voltage (Vdata). That is, the first data line (DL1) can serve both the role of applying a data voltage (Vdata) and the role of applying a touch driving voltage (Tx).

[0047] The integrated driving unit (140) can output a data voltage (Vdata) through the first data line (DL1) during a programming period in which a light emission control signal (Em[n]) of logic high (H) is applied through the Nth light emission control line (EM[n]). Additionally, the integrated driving unit (140) can output a touch driving voltage (Tx) through the first data line (DL1) during an emitting and sensing period in which a Nth light emission control line (EM[n]) of logic low (L) is applied through the light emission control line (EM[n]).

[0048] Meanwhile, in FIG. 8, to help understand that the first data line (DL1) is utilized as the first touch electrode (TX), it is illustrated as being electrically connected to the integrated driving unit (140) through the first touch sensing line (TXL). However, the first data line (DL1) can be directly connected to the integrated driving unit (140) without passing through other lines. Therefore, it is acceptable to interpret that TXL does not exist or to interpret it as a data link that facilitates the electrical connection between the first data line (DL1) and the integrated driving unit (140).

[0049] In addition, Figure 9 shows an example in which a touch driving voltage (Tx) is applied in a form in which a high-level high pulse (PH) and a low-level low pulse (PL) are uniformly repeated, unlike the data voltage (Vdata), but is not limited thereto.

[0050] A cathode electrode pattern (CATP) may be located on the same layer as the cathode electrode (CAT). The cathode electrode pattern (CATP) may be formed from the same layer and the same material as the cathode electrode (CAT), but may be electrically isolated from the cathode electrode (CAT).

[0051] Also, the cathode electrode (CAT) can be positioned corresponding to the light-emitting region of the subpixel, and the cathode electrode pattern (CATP) can be positioned corresponding to the non-light-emitting region of the subpixel. For this reason, it should be noted that in FIG. 8, the cathode electrode pattern (CATP) is depicted so that the organic light-emitting diode (OLED) is distinguished from the depicted region. However, the position or structure of the cathode electrode pattern (CATP) is not limited to the above description.

[0052] The cathode electrode pattern (CATP) can be utilized as a second touch electrode (RX). To this end, the cathode electrode pattern (CATP) can be connected to an integrated driving unit (140) via a second touch sensing line (RXL). The integrated driving unit (140) can perform a sensing operation (Rx) to sense whether a touch is present through the cathode electrode pattern (CATP).

[0053] Meanwhile, the cathode electrode (CAT) and the cathode electrode pattern (CATP) may have a mutually separated structure based on an inverted tapered partition, but are not limited thereto. Additionally, the cathode electrode pattern (CATP) may remain electrically connected to the cathode electrode (CAT) and be electrically separated only during the emitting and sensing period for touch sensing.

[0054] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to a first data line (DL1) used as a first touch electrode (TX) during the emitting and sensing period and senses a cathode electrode pattern (CATP). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0055] FIGS. 10 and 11 are drawings for explaining a part of a touch display device and a method of driving the same according to a second embodiment of the present invention, and FIGS. 12 to 15 are drawings for showing the step-by-step operation of a touch display device according to a second embodiment of the present invention. Since the second embodiment described below is a specific embodiment of the first embodiment, it will be explained mainly focusing on the parts that appear specifically compared to the first embodiment.

[0056] As illustrated in FIGS. 10 and 11, one subpixel may include a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), a capacitor (CST), a driving transistor (DT), and an organic light-emitting diode (OLED). The first transistor (T1), the second transistor (T2), the third transistor (T3), the fourth transistor (T4), the fifth transistor (T5), the sixth transistor (T6), the capacitor (CST), and the driving transistor (DT) are implemented as p-type as an example, but the present invention is not limited thereto.

[0057] The first transistor (T1) may have its gate electrode connected to the N-scan line (SCAN[n]), its first electrode connected to the second electrode of the driving transistor (DT), and its second electrode connected to the other end of the capacitor (CST) and the gate electrode of the driving transistor (DT). The first transistor (T1) can electrically connect (diode connection) the gate electrode of the driving transistor (DT) and the second electrode in response to the N-scan signal (Scan[n]) applied through the N-scan line (SCAN[n]), and also serve to transmit the data voltage transmitted through the second transistor (T2) to the other end of the capacitor (CST).

[0058] The gate electrode of the second transistor (T2) is connected to the N-scan line (SCAN[n]), the first electrode is connected to the first data line (DL1), and the second electrode can be connected to the first electrode of the driving transistor (DT) and the first electrode of the third transistor (T3). The second transistor (T2) can output a data voltage (Vdata) transmitted through the first data line (DL1) in response to the N-scan signal (Scan[n]) applied through the N-scan line (SCAN[n]). Additionally, the first data line (DL1) can be utilized as the first touch electrode (TX) during the emitting and sensing period.

[0059] The gate electrode of the third transistor (T3) is connected to the Nth light emission control line (EM[n]), the first electrode is connected to the first electrode of the driving transistor (DT) and the second electrode of the second transistor (T2), and the second electrode can be connected to one end of the first power line (EVDD) and the capacitor (CST). The third transistor (T3) can serve to transmit the first power transmitted through the first power line (EVDD) to the first electrode of the driving transistor (DT) in response to the Nth light emission control signal (Em[n]) applied through the Nth light emission control line (EM[n]).

[0060] The gate electrode of the fourth transistor (T4) is connected to the Nth light emission control line (EM[n]), the first electrode is connected to the second electrode of the driving transistor (DT), and the second electrode can be connected to the anode electrode of the organic light-emitting diode (OLED) and the first electrode of the sixth transistor (T6). The fourth transistor (T4) can serve to transmit the driving current generated from the driving transistor (DT) to the anode electrode of the organic light-emitting diode (OLED) in response to the Nth light emission control signal (Em[n]) applied through the Nth light emission control line (EM[n]). That is, the fourth transistor (T4) is a light emission control transistor that controls the light emission of the organic light-emitting diode (OLED).

[0061] The gate electrode of the fifth transistor (T5) may be connected to the N-1 scan line (SCAN[n-1]), the first electrode may be connected to the other end of the capacitor (CST) and the gate electrode of the driving transistor (DT), and the second electrode may be connected to the initialization voltage line (VINI). The fifth transistor (T5) may serve to transmit an initialization voltage transmitted through the initialization voltage line (VINI) to the other end of the capacitor (CST) and the gate electrode of the driving transistor (DT) in response to the N-1 scan signal (Scan[n-1]) applied through the N-1 scan line (SCAN[n-1]).

[0062] The gate electrode of the 6th transistor (T6) is connected to the Nth scan line (SCAN[n]), the first electrode is connected to the second electrode of the 4th transistor (T4) and the anode electrode of the organic light-emitting diode (OLED), and the second electrode is connected to the initialization voltage line (VINI). The 6th transistor (T6) can play the role of transmitting an initialization voltage transmitted through the initialization voltage line (VINI) to the anode electrode of the organic light-emitting diode (OLED) in response to the Nth scan signal (Scan[n]) applied through the Nth scan line (SCAN[n]).

[0063] One end of the capacitor (CST) may be connected to the first power line (EVDD) and the second electrode of the third transistor (T3), and the other end may be connected to the gate electrode of the driving transistor (DT), the second electrode of the first transistor (T1), and the second electrode of the fifth transistor (T5). The capacitor (CST) may store a data voltage and transmit the stored data voltage to the gate electrode of the driving transistor (DT).

[0064] The driving transistor (DT) may have its gate electrode connected to the other end of the capacitor (CST) and the second electrode of the first transistor (T1), its first electrode connected to the second electrode of the second transistor (T2) and the first electrode of the third transistor (T3), and its second electrode connected to the first electrode of the first transistor (T1) and the first electrode of the fourth transistor (T4). The driving transistor (DT) may function to generate a driving current in response to the data voltage stored in the capacitor (CST).

[0065] The organic light-emitting diode (OLED) can have its anode electrode connected to the second electrode of the fourth transistor (T4) and the first electrode of the sixth transistor (T6), and its cathode electrode connected to the second power line (EVSS). The organic light-emitting diode (OLED) can emit light based on the driving current of the driving transistor (DT).

[0066] As explained in the first embodiment, a cathode electrode pattern layer (CATP) is located on the same layer as the cathode electrode of the organic light-emitting diode (OLED) and is utilized as a second touch electrode (RX) during the emitting and sensing period. Since the cathode electrode pattern layer (CATP) is structurally difficult to illustrate on the equivalent circuit of FIG. 10, refer to FIG. 8.

[0067] The integrated driving unit (140) may include a data driving unit (DIC), a touch driving unit (ROIC), a switch control unit (SWCON), and switches (M1, M2), etc. The data driving unit (DIC) may generate a data voltage (Vdata) and output it through the first channel (CH1). The touch driving unit (ROIC) may generate a touch driving voltage (Tx) and output it through the first channel (CH1). The switch control unit (SWCON) may generate and output a first switch control signal (Dcs) and a second switch control signal (Rcs).

[0068] The switches (M1, M2) may include a first switch (M1) and a second switch (M2).

[0069] The first switch (M1) may have a control electrode connected to a first switch control signal line (DCS) that transmits a first switch control signal (Dcs), a first electrode connected to an output terminal of a data driver (DIC), and a second electrode connected to a first channel (CH1) of an integrated driver (140). The first switch (M1) may be turned on in response to a first switch control signal (Dcs) that is applied as a logic high (H) during the driving period of the data driver (DIC). The data voltage (Vdata) output through the output terminal of the data driver (DIC) may be output through the first channel (CH1) of the integrated driver (140) by the turned-on first switch (M1).

[0070] The second switch (M2) may have a control electrode connected to the second switch control signal line (RCS) that transmits the second switch control signal (Rcs), a first electrode connected to the output terminal of the touch driver (ROIC), and a second electrode connected to the first channel (CH1) of the integrated driver (140). The second switch (M2) may be turned on in response to the second switch control signal (Rcs) applied as logic high (H) during the driving period of the touch driver (ROIC). The touch driving voltage (Tx) output through the output terminal of the touch driver (ROIC) may be output through the first channel (CH1) of the integrated driver (140) by the turned-on second switch (M2).

[0071] As illustrated in FIGS. 11 to 15, one subpixel can operate by being divided into an initialization period (INIT), a sampling period (SAM), a hold period (HOL), and an emission period (EMP).

[0072] The initialization period (INIT), sampling period (SAM), and hold period (HOL) can be defined as programming periods for applying data voltage (Vdata), and the emission period (EMP) can be defined as an emitting and sensing period for sensing the presence or absence of touch through touch electrodes (TX, RX) along with the emission of an organic light-emitting diode (OLED).

[0073] During the initialization period (INIT), sampling period (SAM), and hold period (HOL), the first switch (M1) can be turned on and the second switch (M2) can be turned off. During the emission period (EMP), the first switch (M1) can be turned off and the second switch (M2) can be turned on.

[0074] As shown in FIGS. 11 and 12, the fifth transistor (T5) can be turned on by the N-1 scan signal (Scan[N-1]) during the initialization period (INIT). By turning on the fifth transistor (T5), the other end of the capacitor (CST) and the gate electrode (gate node) of the driving transistor (DT) can be initialized.

[0075] As shown in FIGS. 11 and 13, the first transistor (T1), the second transistor (T2), and the sixth transistor (T6) can be turned on by the Nth scan signal (Scan[N]) during the sampling period (SAM). The driving transistor (DT) can perform a threshold voltage sampling operation by the turned-on first transistor (T1) and the second transistor (T2). Accordingly, the capacitor (CST) can store a data voltage compensated for the threshold voltage of the driving transistor (DT). And the anode electrode of the organic light-emitting diode (OLED) can be initialized by the turned-on sixth transistor (T6).

[0076] As shown in FIGS. 11 and 14, all transistors (T1 to T6, DT) can be turned off during the hold period (HOL). The hold period (HOL) is a period (voltage holding period) for stabilizing the sampling operation and data voltage storage operation performed during the sampling period (SAM). The hold period (HOL) may be omitted depending on the driving method.

[0077] As shown in FIGS. 11 and 15, the third transistor (T3) and the fourth transistor (T4) can be turned on by the Nth light emission control signal (Em[n]) during the light emission period (EMP). By the turned-on third transistor (T3) and the fourth transistor (T4), the driving transistor (DT) can generate a driving current (Ioled) based on a data voltage (Vdata + Vth) with a threshold voltage compensated. And the organic light-emitting diode (OLED) can emit light based on the driving current (Ioled).

[0078] Additionally, during the light emission period (EMP), the touch driving voltage (Tx) output through the output terminal of the touch driving unit (ROIC) and the first channel (CH1) of the integrated driving unit (140) can be applied to the first data line (DL1) which becomes the first touch electrode (TX). If a user touch is present during the light emission period (EMP), a change in capacitance can be detected through sensing of the cathode electrode pattern layer (CATP), which is located on the same layer as the cathode electrode of the organic light-emitting diode (OLED) and becomes the second touch electrode (RX). As a result, the presence or absence of a user touch can be determined based on the driving of the integrated driving unit (140), etc.

[0079] FIGS. 16 to 18 are drawings for explaining a part of a touch display device and a driving method thereof according to a third embodiment of the present invention.

[0080] As illustrated in FIGS. 16 to 18, one subpixel (SP) may be connected to a first power line (EVDD), a second power line (EVSS), a first data line (DL1), and a first gate line (GL1). The first gate line (GL1) may include an N-scan line (SCAN[n]) that transmits a scan signal for applying a data voltage (Vdata) and an N-emission control line (EM[n]) that transmits an N-emission control signal (Em[n]) for controlling the emission of an organic light-emitting diode (OLED).

[0081] The integrated driving unit (140) may be implemented to include a data driving unit (DIC) and a touch driving unit (ROIC). The first data line (DL1) connected to the integrated driving unit (140) may be utilized (switched in use) as a first touch electrode (TX) to apply a touch driving voltage (Tx) after a programming period for applying a data voltage (Vdata). That is, the first data line (DL1) can serve both the role of applying a data voltage (Vdata) and the role of applying a touch driving voltage (Tx).

[0082] A single subpixel (SP) can be implemented based on a thin-film transistor layer (TFTs) including a transistor connected to a first data line (DL1) on a substrate (SUB), and an organic light-emitting diode layer (OLEDs) including a light-emitting organic light-emitting diode (OLED). Since the thin-film transistor layer (TFTs) and the organic light-emitting diode layer (OLEDs) are susceptible to moisture or oxygen, they can be sealed by a sealing layer (ENC).

[0083] An electrode layer (TOE) may be disposed on the sealing layer (ENC). The electrode layer (TOE) may serve as a second touch electrode (RX). To this end, the electrode layer (TOE) may be connected to an integrated driving unit (140) via a second touch sensing line (RXL). Meanwhile, the electrode layer (TOE) may be disposed to pass through a non-luminous region separated from the subpixel (SP) (or the light-emitting region of the subpixel). Additionally, the electrode layer (TOE) may be patterned to appear as a mesh shape when viewed on a flat plane representing the entire display panel, but is not limited thereto.

[0084] The integrated driving unit (140) can output a data voltage (Vdata) during a programming period in which the Nth light emission control signal (Em[n]) of logic high (H) is applied through the Nth light emission control line (EM[n]). Additionally, the integrated driving unit (140) can output a touch driving voltage (Tx) during an emitting and sensing period in which the Nth light emission control signal (Em[n]) of logic low (L) is applied through the Nth light emission control line (EM[n]). Additionally, the integrated driving unit (140) can perform a sensing operation (Rx) to sense whether a touch is present through the second touch electrode (RX) during the emitting and sensing period.

[0085] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to a first data line (DL1) used as a first touch electrode (TX) during the emitting and sensing period and senses a second touch electrode (TOE(RX)) on a sealing layer (ENC). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0086] FIGS. 19 and 20 are drawings for more specifically explaining a part of a touch display device and a driving method thereof according to a third embodiment of the present invention.

[0087] As illustrated in FIGS. 19 and 20, one subpixel may include a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), a capacitor (CST), a driving transistor (DT), and an organic light-emitting diode (OLED). The first transistor (T1), the second transistor (T2), the third transistor (T3), the fourth transistor (T4), the fifth transistor (T5), the sixth transistor (T6), the capacitor (CST), and the driving transistor (DT) are implemented as p-type as an example, but the present invention is not limited thereto.

[0088] The third embodiment is substantially similar to the second embodiment, except that the second touch electrode (RX) is placed on the sealing layer (ENC). Accordingly, the part related to the equivalent circuit of FIG. 19 and the driving method of FIG. 20 is replaced with the second embodiment.

[0089] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to a first data line (DL1) used as a first touch electrode (TX) during the emitting and sensing period and senses a second touch electrode (TOE(RX)) on a sealing layer (ENC). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0090] FIGS. 21 and 22 are drawings for explaining a part of a touch display device and a method of driving the same according to a fourth embodiment of the present invention. The following description of the fourth embodiment focuses on the parts that differ from the first to third embodiments.

[0091] As illustrated in FIGS. 21 and 22, one subpixel (SP) may be connected to a first power line (EVDD), a second power line (EVSS), a first data line (DL1), and a first gate line (GL1). The first gate line (GL1) may include an N-1 scan line (SCAN[n-1]) that transmits an N-1 scan signal (Scan[n-1]) for applying an initialization voltage, an N scan line (SCAN[n]) that transmits an N scan signal for applying a data voltage (Vdata), and an N light emission control line (EM[n]) that transmits an N light emission control signal (Em[n]) for controlling the light emission of an organic light-emitting diode (OLED).

[0092] The N-1 scan line (SCAN[n-1]) connected to the integrated driving unit (140) can be utilized (converted) as a first touch electrode (TX) to apply a touch driving voltage (Tx) after the programming period. That is, the N-1 scan line (SCAN[n-1]) can serve both the role of applying the N-1 scan signal (Scan[n-1]) and the role of applying the touch driving voltage (Tx). The N-1 scan line (SCAN[n-1]) can be connected to the integrated driving unit (140) through the first touch sensing line (TXL).

[0093] The first data line (DL1) connected to the integrated driving unit (140) can be utilized (converted) to a second touch electrode (RX) for touch sensing operation after a programming period for applying a data voltage (Vdata). That is, the first data line (DL1) can serve both the role of applying a data voltage (Vdata) and the role of touch sensing. The first data line (DL1) can be connected to the integrated driving unit (140) through the second touch sensing line (RXL).

[0094] The integrated driving unit (140) may be physically or electrically separated from the N-1 scan line (SCAN[n-1]) during the programming period in which the Nth light emission control signal (Em[n]) of logic high (H) is applied through the Nth light emission control line (EM[n]). Additionally, the integrated driving unit (140) may output a touch driving voltage (Tx) through the N-1 scan line (SCAN[n-1]), which becomes the first touch electrode (TX), during the emitting and sensing period in which the Nth light emission control signal (Em[n]) of logic low (L) is applied through the Nth light emission control line (EM[n]). Additionally, the integrated driving unit (140) can perform a sensing operation (Rx) to sense whether there is a touch through the first data line (DL1) which becomes the second touch electrode (RX) during the emitting and sensing period.

[0095] Meanwhile, in FIG. 22, a touch driving voltage (Tx) is applied in a form where a high-level high pulse (PH) and a low-level low pulse (PL) are uniformly repeated, and the N-1 scan signal (Scan[n-1]) of the low-level low pulse (PL) and logic high (H) has an equipotential (same level), but is not limited thereto. That is, the low-level low pulse (PL) can be any voltage level capable of turning off the transistor connected to the N-1 scan line (SCAN[n-1]).

[0096] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to the N-1 scan line (SCAN[n-1]) used as the first touch electrode (TX) during the emitting and sensing period and senses the first data line (DL1) used as the second touch electrode (RX). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0097] FIGS. 23 and 24 are drawings for more specifically explaining a part of a touch display device and a driving method thereof according to the fifth embodiment of the present invention. Since the fifth embodiment described below is a specific embodiment of the fourth embodiment, the description will focus on the parts that appear specifically compared to the fourth embodiment.

[0098] As illustrated in FIGS. 23 and 24, one subpixel may include a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), a capacitor (CST), a driving transistor (DT), and an organic light-emitting diode (OLED).

[0099] A single subpixel can operate by dividing it into an initialization period (INIT), a sampling period (SAM), a hold period (HOL), and an emission period (EMP). Refer to the second embodiment for the functions, connection relationships, and operation relationships of the components included in the subpixel.

[0100] The touch driving voltage (Tx) can be applied in a form where a high-level high pulse (PH) and a low-level low pulse (PL) are repeated. The low-level low pulse (PL) of the touch driving voltage (Tx) and the N-1 scan signal (Scan[n-1]) of logic high (H) can have equipotential (same level). Since the fifth transistor (T5) connected to the N-1 scan line (SCAN[n-1]) is implemented as a p-type, it can remain in a turned-off state by the N-1 scan signal (Scan[n-1]) of logic high (H).

[0101] Therefore, if the touch driving voltage (Tx) is configured to have an equipotential (same level) with the N-1 scan signal (Scan[n-1]) of logic high (H) or a higher level, it is possible to prevent problems (turn-on of T5) that may occur when utilizing the N-1 scan line (SCAN[n-1]) as the first touch electrode (TX) while maintaining the turn-off of the fifth transistor (T5).

[0102] The N-1 scan line (SCAN[n-1]) connected to the integrated driving unit (140) can be utilized (switched use) as a first touch electrode (TX) for applying a touch driving voltage (Tx) after a programming period. The first data line (DL1) connected to the integrated driving unit (140) can be utilized (switched use) as a second touch electrode (RX) for touch sensing operation after a programming period for applying a data voltage (Vdata).

[0103] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to the N-1 scan line (SCAN[n-1]) used as the first touch electrode (TX) during the emitting and sensing period and senses the first data line (DL1) used as the second touch electrode (RX). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0104] FIGS. 25 and 26 are drawings for explaining a part of a touch display device and a driving method thereof according to a sixth embodiment of the present invention, and FIGS. 27 and 28 are drawings for explaining a part of a touch display device and a driving method thereof according to a sixth embodiment of the present invention in more detail. In the following description of the sixth embodiment, the parts that differ from the fourth and fifth embodiments will be explained mainly.

[0105] As illustrated in FIGS. 25 and 26, one subpixel (SP) may be connected to a first power line (EVDD), a second power line (EVSS), a first data line (DL1), and a first gate line (GL1). The first gate line (GL1) may include an N-1 scan line (SCAN[n-1]) that transmits an N-1 scan signal (Scan[n-1]) for applying an initialization voltage, an N scan line (SCAN[n]) that transmits an N scan signal for applying a data voltage (Vdata), and an N light emission control line (EM[n]) that transmits an N light emission control signal (Em[n]) for controlling the light emission of an organic light-emitting diode (OLED).

[0106] The N-scan line (SCAN[n]) connected to the integrated driving unit (140) can be utilized (converted to use) as a first touch electrode (TX) to apply a touch driving voltage (Tx) after the programming period. That is, the N-scan line (SCAN[n]) can serve both the role of applying the N-scan signal (Scan[n]) and the role of applying the touch driving voltage (Tx). The N-scan line (SCAN[n]) can be connected to the integrated driving unit (140) through the first touch sensing line (TXL).

[0107] The first data line (DL1) connected to the integrated driving unit (140) can be utilized (converted) to a second touch electrode (RX) for touch sensing operation after a programming period for applying a data voltage (Vdata). That is, the first data line (DL1) can serve both the role of applying a data voltage (Vdata) and the role of touch sensing. The first data line (DL1) can be connected to the integrated driving unit (140) through the second touch sensing line (RXL).

[0108] As illustrated in FIGS. 27 and 28, one subpixel may include a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), a capacitor (CST), a driving transistor (DT), and an organic light-emitting diode (OLED).

[0109] A single subpixel can operate by dividing it into an initialization period (INIT), a sampling period (SAM), a hold period (HOL), and an emission period (EMP). Refer to the second embodiment for the functions, connection relationships, and operation relationships of the components included in the subpixel.

[0110] The touch driving voltage (Tx) can be applied in a form where a high-level high pulse (PH) and a low-level low pulse (PL) are repeated. The low-level low pulse (PL) of the touch driving voltage (Tx) and the Nth scan signal (Scan[n]) of logic high (H) can have equipotential (same level). Since the first transistor (T1) and the second transistor (T2) connected to the Nth scan line (SCAN[n]) are implemented as p-type, they can remain in a turned-off state by the Nth scan signal (Scan[n]) of logic high (H).

[0111] Therefore, if the touch driving voltage (Tx) is configured to have an equipotential (same level) with the Nth scan signal (Scan[n]) of logic high (H) or a level higher than that, it is possible to prevent problems (turn-on of T1 & T2) that may occur when utilizing the Nth scan line (SCAN[n]) as the first touch electrode (TX) while maintaining the turn-off of the first transistor (T1) and the second transistor (T2).

[0112] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to the N-scan line (SCAN[n]) used as the first touch electrode (TX) during the emitting and sensing period and senses the first data line (DL1) used as the second touch electrode (RX). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0113] FIGS. 29 and FIGS. 30 are exemplary diagrams showing the use of a scan line as a first touch electrode among embodiments of the present invention.

[0114] FIG. 29 is an example in which the N-1 scan line or the N scan line is utilized as a first touch electrode, and 72 lines are grouped together to form a single first touch electrode. That is, the first touch electrode (TX1) of the first line is configured as a single first touch electrode by electrically connecting the scan lines included in the pixel (1 Pixel) of the first line to the pixel (72 Pixel) of the 72nd line.

[0115] A display panel (150) having a touch sensor (TSP) is implemented in ultra-high definition (UHD; 3840x2160), and as described above, 72 lines are grouped into one first touch electrode, so that touch electrodes (TX1) of the first line to touch electrodes (TX30) of the 30th line can be provided on the display panel (150).

[0116] When a display panel (150) having a touch sensor (TSP) provided as in FIG. 29 is driven, as can be seen in FIG. 30, a total of 30 lines of touch and sensing possible sections can be provided sequentially along the scan direction.

[0117] The touch and sensing possible section is the scan signal (1) of the logic row (L). st _Scan ~ 2106 th After outputting _Scan), the scan signal (1) of logic high (H) st _Scan ~ 2106 th It can be provided during the period of maintaining _Scan). And even during that period, the light emission control signal (1 of logic low (L) st _Em ~ 2160 th The organic light-emitting diode can be provided for the period during which it emits light by _Em).

[0118] Meanwhile, FIGS. 29 and 30 are merely examples for illustrative purposes. A first touch electrode can be implemented with at least one scan line to increase touch resolution, and can also be implemented with two or more scan lines to improve touch sensing capability (sensitivity). Furthermore, this applies not only to scan lines but to all configurations utilized as the first touch electrode.

[0119] FIGS. 31 to 33 are drawings illustrating a part of a touch display device and a driving method thereof according to the seventh embodiment of the present invention. The seventh embodiment will be described below with a focus on the parts that differ from the previously described embodiments.

[0120] As illustrated in FIGS. 31 and 32, one subpixel (SP) may be connected to a first power line (EVDD), a second power line (EVSS), a first data line (DL1), and a first gate line (GL1). The first gate line (GL1) may include an Nth scan line (SCAN[n]) that transmits an Nth scan signal for applying a data voltage (Vdata) and an Nth light emission control line (EM[n]) that transmits an Nth light emission control signal (Em[n]) for controlling the light emission of an organic light-emitting diode (OLED).

[0121] The N-scan line (SCAN[n]) connected to the integrated driving unit (140) can be utilized (converted to use) as a first touch electrode (TX) to apply a touch driving voltage (Tx) after the programming period. That is, the N-scan line (SCAN[n]) can serve both the role of applying the N-scan signal (Scan[n]) and the role of applying the touch driving voltage (Tx). The N-scan line (SCAN[n]) can be connected to the integrated driving unit (140) through the first touch sensing line (TXL).

[0122] The first data line (DL1) connected to the integrated driving unit (140) can be utilized (converted) to a second touch electrode (RX) for touch sensing operation after a programming period for applying a data voltage (Vdata). That is, the first data line (DL1) can serve both the role of applying a data voltage (Vdata) and the role of touch sensing. The first data line (DL1) can be connected to the integrated driving unit (140) through the second touch sensing line (RXL).

[0123] As illustrated in FIGS. 32 and 33, one subpixel may include a first transistor (T1), a second transistor (T2), a capacitor (CST), a driving transistor (DT), and an organic light-emitting diode (OLED). The first transistor (T1), the second transistor (T2), and the driving transistor (DT) may be implemented as n-type.

[0124] The first transistor (T1) may have its gate electrode connected to the Nth scan line (SCAN[n]), its first electrode connected to the first data line (DL1), and its second electrode connected to the gate electrode of the driving transistor (DT) and one end of the capacitor (CST). The first transistor (T1) may turn on in response to the Nth scan signal (Scan[n]) applied through the Nth scan line (SCAN[n]) and serve to transmit a data voltage (Vdata) to one end of the capacitor (CST).

[0125] The gate electrode of the second transistor (T2) is connected to the Nth light emission control line (EM[n]), the first electrode is connected to the second electrode of the driving transistor (DT) and the other end of the capacitor (CST), and the second electrode can be connected to the anode electrode of the organic light-emitting diode (OLED). The second transistor (T2) can turn on in response to the Nth light emission control signal (Em[n]) applied through the Nth light emission control line (EM[n]) and output the driving current generated from the driving transistor (DT).

[0126] One end of the capacitor (CST) can be connected to the gate electrode of the driving transistor (DT), and the other end can be connected to the second electrode of the driving transistor (DT). The capacitor (CST) can store a data voltage (Vdata) and drive the driving transistor (DT) based on the stored data voltage (Vdata).

[0127] The driving transistor (DT) may have its gate electrode connected to one end of the capacitor (CST) and the second electrode of the first transistor (T1), its first electrode connected to the first power line (EVDD), and its second electrode connected to the other end of the capacitor (CST) and the second transistor (T2). The driving transistor (DT) may turn on in response to the data voltage (Vdata) provided from the capacitor (CST) and generate a driving current.

[0128] The organic light-emitting diode (OLED) can have its anode electrode connected to the second electrode of the second transistor (T2) and its cathode electrode connected to the second power line (EVSS). The organic light-emitting diode (OLED) can emit light based on the driving current output (transmitted) through the second transistor (T2).

[0129] The touch driving voltage (Tx) can be applied in a form where a high-level high pulse (PH) and a low-level low pulse (PL) are repeated. The high-level high pulse (PH) of the touch driving voltage (Tx) and the Nth scan signal (Scan[n]) of logic low (L) can have equipotential (same level). Since the first transistor (T1) connected to the Nth scan line (SCAN[n]) is implemented as an n type, it can remain in a turned-off state by the Nth scan signal (Scan[n]) of logic low (L).

[0130] Therefore, if the touch driving voltage (Tx) is configured to have an equipotential (same level) with the Nth scan signal (Scan[n]) of the logic low (L) or a level lower than that, it is possible to prevent problems (turn-on of T1) that may occur when utilizing the Nth scan line (SCAN[n]) as the first touch electrode (TX) while maintaining the turn-off of the first transistor (T1).

[0131] The integrated driving unit (140) can acquire a touch sensing value based on a sensing operation (Rx) that applies a touch driving voltage (Tx) to the N-scan line (SCAN[n]) used as the first touch electrode (TX) during the emitting and sensing period and senses the first data line (DL1) used as the second touch electrode (RX). The integrated driving unit (140) can integrate and sample the touch sensing value and then generate and output touch raw data that can determine whether a touch is present or the touch location information.

[0132] As described above, since the sensing operation of the touch sensor is performed in conjunction with the image display operation (light emission operation) of the display panel, the present invention has the effect of reducing noise generated due to interference from other signals or voltages during operation preparation and improving the sensing sensitivity of the touch sensor. Furthermore, the present invention has the effect of providing a touch display device that is free from constraints such as design or operating environments that may be induced when implementing a touch sensor through a series of processes involved in the manufacturing of the display panel. Explanation of the symbols

[0133] 150: Display panel 155: Touch sensor 140: Data driver 145: Touch driver TX: 1st touch electrode RX: 2nd touch electrode

Claims

Claim 1 A touch display device comprising: a display panel including a subpixel; a touch sensor including a touch electrode provided based on the electrode of a light-emitting diode included in the subpixel; and a touch driving unit sensing the touch sensor, wherein the touch driving unit utilizes a signal line connected to the subpixel as a touch electrode during the light-emitting period of the light-emitting diode, and the light-emitting period of the light-emitting diode and the period of sensing the touch sensor occur together in a single period after a programming period in which a data voltage is applied to the subpixel. Claim 2 A touch display device according to claim 1, wherein the signal line includes a data line and a scan line connected to the subpixel. Claim 3 In paragraph 2, the touch driving unit is a touch display device that applies a touch driving voltage through one of the data line or the scan line. Claim 4 In paragraph 2, the touch driving unit applies a touch driving voltage through the scan line, wherein the touch driving voltage is a pulse consisting of a voltage level capable of turning off a transistor connected to the scan line. Claim 5 A touch display device according to claim 1, wherein the touch driving unit applies a touch driving voltage through a data line connected to the subpixel during the light emission period of the light-emitting diode and senses the cathode electrode of the light-emitting diode to detect whether the touch sensor is touched. Claim 6 A touch display device according to claim 1, wherein the touch driving unit applies a touch driving voltage through a data line connected to the subpixel during the light emission period of the light-emitting diode and senses a touch electrode on a sealing layer covering the cathode electrode of the light-emitting diode to detect whether the touch sensor is touched. Claim 7 A touch display device according to claim 1, wherein the touch driving unit applies a touch driving voltage through an N-1 scan line connected to the subpixel during the light emission period of the light-emitting diode and senses a data line connected to the subpixel to detect whether the touch sensor is touched, and the transistor connected to the N-1 scan line controls whether the gate electrode of the driving transistor included in the subpixel is initialized. Claim 8 A touch display device according to claim 1, wherein the touch driving unit applies a touch driving voltage through an N-scan line connected to the subpixel during the light emission period of the light-emitting diode and senses a data line connected to the subpixel to detect whether the touch sensor is touched, and the transistor connected to the N-scan line controls whether the anode electrode of the light-emitting diode is initialized. Claim 9 In claim 1, the subpixel includes a light-emitting control transistor that controls the light-emitting period of the light-emitting diode, and the touch driving unit is a touch display device that operates to detect whether a touch is present during the period when the light-emitting control transistor is turned on. Claim 10 A method for driving a touch display device comprising a display panel including a subpixel, a touch sensor including a touch electrode provided based on an electrode of a light-emitting diode included in the subpixel, and a touch driving unit for sensing the touch sensor, the method comprising: a programming step of applying a data voltage to the subpixel; and a light emission and sensing step of emitting light from the light-emitting diode based on the data voltage applied to the subpixel, and simultaneously applying a touch driving voltage to the touch sensor and sensing, wherein the period of emitting light from the light-emitting diode and the period of sensing the touch sensor occur together in a single period. Claim 11 In claim 10, the above-mentioned touch driving voltage is applied through one of a data line or a scan line connected to the above-mentioned subpixel, in a driving method of a touch display device. Claim 12 A driving method for a touch display device according to claim 11, wherein the touch driving voltage applied through the scan line is a pulse consisting of a voltage level capable of turning off a transistor connected to the scan line.

Images