Touch display device and driving method for touch display device

Abstract

To provide a touch display device which enables pen touch driving and display driving simultaneously, and a driving method for the touch display device.SOLUTION: A touch display device 10 includes a display panel where a number of sub-pixels are arranged, a touch panel where a number of touch electrodes are arranged, and a touch circuit for supplying an uplink signal and a touch driving signal to the touch panel. The uplink signal includes a first uplink signal and a second uplink signal, and the first uplink signal, which is a first waveform signal, is supplied to a first touch electrode among the touch electrodes, and the second uplink signal, which is a second waveform signal having a waveform different from the first waveform signal, is supplied to a second touch electrode among the touch electrodes.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The embodiments of the present disclosure relate to a touch display device and a driving method for the touch display device. [Background technology]

[0002] As the information society develops, the demand for display devices for displaying images is increasing in various forms. Various display devices, such as liquid crystal displays, electroluminescent displays, and quantum dot light-emitting displays, are being used.

[0003] In order to provide more diverse functions, such display devices provide a function of recognizing a user's finger touch or pen touch on the display panel and performing input processing based on the recognized touch.

[0004] For pen touch driving, the touch circuit and the pen can transmit and receive uplink and downlink signals. Summary of the Invention [Problem to be solved by the invention]

[0005] The pen touch driving and the display driving may be performed simultaneously.

[0006] In this case, the signal for pen touch driving may affect the display driving.

[0007] This may cause abnormal phenomena in the display panel.

[0008] Therefore, the embodiments of the present disclosure can provide a touch display device that can simultaneously perform pen touch driving and display driving, and a driving method for the touch display device.

[0009] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device that can prevent the influence of pen touch driving on display driving.

[0010] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device, which can prevent abnormal phenomena from occurring in the display panel.

[0011] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device that can improve pen touch performance.

[0012] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device that can reduce power consumption by preventing abnormal phenomena from occurring in the display panel. [Means for solving the problem]

[0013] An embodiment of the present disclosure can provide a touch display device including a display panel on which a number of sub-pixels are arranged, a touch panel on which a number of touch electrodes are arranged, and a touch circuit for supplying uplink signals to the touch panel, the uplink signals including a first uplink signal and a second uplink signal, the first uplink signal being a first waveform signal being supplied to the first touch electrode, and the second uplink signal being a second waveform signal having a waveform different from the first waveform signal being supplied to the second touch electrode.

[0014] The second waveform signal may be in the form of a signal that is inverted relative to the first waveform signal, or the second waveform signal may be an opposite-phase signal to the first waveform signal.

[0015] An embodiment of the present disclosure may provide a method for driving a touch display device, the method including: an uplink signal output step of supplying an uplink signal to a touch panel on which a plurality of touch electrodes are arranged; and a downlink signal output step of outputting a downlink signal corresponding to the uplink signal from a pen that has received the uplink signal, the uplink signal including a first uplink signal and a second uplink signal that is an inverted signal of the first uplink signal, the first uplink signal being supplied to a first touch electrode, and the second uplink signal being supplied to a second touch electrode.

[0016] According to the embodiments of the present disclosure, it is possible to provide a touch display device capable of pen touch driving and display driving simultaneously, and a method for driving a touch display device.

[0017] According to the embodiments of the present disclosure, it is possible to provide a touch display device and a method for driving a touch display device that can prevent the influence of pen touch driving on display driving.

[0018] According to the embodiments of the present disclosure, it is possible to provide a touch display device and a driving method for the touch display device that can prevent abnormal phenomena occurring in the display panel.

[0019] According to the embodiments of the present disclosure, it is possible to provide a touch display device and a method for driving a touch display device that can improve pen touch performance.

[0020] According to the embodiments of the present disclosure, it is possible to provide a touch display device and a method for driving a touch display device that can reduce power consumption by preventing abnormal phenomena occurring in a display panel. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a diagram illustrating a touch system according to an embodiment of the present invention; [Figure 2] 2 is a diagram illustrating a display portion of a touch display device according to an embodiment of the present invention; [Figure 3]1 is a diagram illustrating an example of a touch display device according to an embodiment of the present invention; [Figure 4] 1 is a diagram illustrating an example of a touch sensing portion for mutual-capacitance based touch sensing in a touch display device according to an embodiment of the present invention; [Figure 5] 10 is a diagram showing a driving timing diagram illustrating a time division driving method for display driving and touch driving of a touch display device according to an embodiment. FIG. [Figure 6] 1 is a diagram illustrating a driving timing diagram showing an independent driving method for a display drive and a touch drive of a touch display device according to an embodiment of the present invention; [Figure 7] 4A and 4B are diagrams illustrating touch driving operations between a touch display device and a pen according to an embodiment of the present invention; [Figure 8] 10 is an exemplary diagram illustrating a driving timing of a touch driving operation between a touch display device and a pen according to an embodiment of the present invention; [Figure 9] FIG. 10 is a diagram relating to pen touch driving and finger touch driving performed during one frame period according to an embodiment of the present disclosure. [Figure 10] FIG. 10 is a diagram of an uplink signal provided to a touch electrode according to an embodiment of the present disclosure. [Figure 11] 10A and 10B are diagrams relating to an abnormal phenomenon occurring in a display panel according to an embodiment of the present disclosure. [Figure 12] FIG. 10 is a diagram of an uplink signal provided to a touch electrode according to an embodiment of the present disclosure. [Figure 13] FIG. 2 is a diagram relating to a first waveform signal and a second waveform signal according to an embodiment of the present disclosure. [Figure 14] FIG. 2 is a diagram relating to a first waveform signal and a second waveform signal according to an embodiment of the present disclosure. [Figure 15] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 16] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 17]10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 18] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 19] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 20] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 21] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 22] 10 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure. FIG. [Figure 23] FIG. 1 is a diagram of a local drive according to an embodiment of the present disclosure. [Figure 24] FIG. 10 is a diagram relating to pen touch driving and finger touch driving that proceed during one frame period Frame according to an embodiment of the present disclosure. [Figure 25] FIG. 10 is a diagram relating to pen touch driving and finger touch driving that proceed during one frame period Frame according to an embodiment of the present disclosure. [Figure 26] 1 is a flowchart illustrating a method for driving a touch display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0022] Some embodiments of the present disclosure will be described in detail below with reference to the illustrative drawings. When adding reference numerals to components in each drawing, the same reference numerals may be used to the same components as long as they appear in different drawings. When describing the present disclosure, if a detailed description of related publicly known structures or functions is deemed to obscure the gist of the present disclosure, such a detailed description may be omitted. When terms such as "include," "have," and "perform" are used in this specification, other parts may be added unless "only" is used. When a component is expressed as a singular element, the plural may also be included unless otherwise explicitly stated.

[0023] Furthermore, when describing components of the present disclosure, terms such as first, second, A, B, (a), (b), etc. are used to distinguish the components from other components, and the terms do not limit the essence, order, procedure, number, etc. of the components.

[0024] In describing the positional relationship of components, when two or more components are described as being "coupled," "coupled," or "connected," it should be understood that the two or more components may be directly "coupled," "coupled," or "connected," but that the two or more components may also be "coupled," "coupled," or "connected" through an "intervening" component. Here, the other component may be included in one or more of the two or more components that are "coupled," "coupled," or "connected" to each other.

[0025] In describing the temporal sequence of elements, methods of operation, methods of production, etc., when the temporal or chronological sequence is described using, for example, "after," "following," "after," or "before," non-consecutive sequences may also be included, unless "immediately" or "directly" is used.

[0026] On the other hand, when referring to a numerical value or its corresponding information (e.g., level, etc.) for a component, even if there is no explicit statement otherwise, the numerical value or its corresponding information can be interpreted as including an error range that may arise due to various factors (e.g., process factors, internal or external impact, noise, etc.).

[0027] Various embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0028] FIG. 1 is a diagram schematically illustrating a touch system according to an embodiment of the present invention.

[0029] The touch system according to an embodiment of the present invention may include a touch display device 10 and a pen 20 associated therewith.

[0030] The touch display device 10 according to the embodiment of the present invention not only provides an image display function for displaying an image, but also provides a touch sensing function using a finger or a pen 20 or the like.

[0031] Here, the "pen 20" may include an active pen, which is a touch tool that has a signal transmission / reception function, can operate in conjunction with the touch display device 10, or includes its own power source, and a passive pen, which is a touch tool that does not have a signal transmission / reception function or its own power source.

[0032] Here, the touch tool refers not only to a finger but also to any object that can touch the screen in place of a finger, and is also called a touch object or touch pointer.

[0033] Hereinafter, a finger may be considered to represent a passive touch tool such as a passive pen, and the pen 20 may be considered to represent an active touch tool such as an active pen, where the pen 20 may also be called a stylus, a stylus pen, or an active stylus pen.

[0034] The touch display device 10 according to the embodiment of the present invention may be, for example, a television (TV), a monitor, or a mobile device such as a tablet or a smartphone.

[0035] The touch display device 10 according to the embodiment of the present invention may include a display portion for providing an image display function and a touch sensing portion for touch sensing.

[0036] FIG. 2 is a diagram illustrating a display portion of a touch display device 10 according to an embodiment of the present invention.

[0037] Referring to FIG. 2, the display part of the touch display device 10 according to the embodiment of the present invention may include a display panel 110, a data driving circuit 120, a gate driving circuit 130, a display controller 140, and the like.

[0038] The display panel 110 has a number of data lines DL and a number of gate lines GL arranged thereon, and a number of sub-pixels SP defined by the number of data lines DL and the number of gate lines GL arranged thereon.

[0039] The data driving circuit 120 supplies data voltages to the data lines DL to drive the data lines DL.

[0040] The gate driving circuit 130 sequentially supplies scan signals to the gate lines GL to drive the gate lines GL.

[0041] The display controller 140 supplies various control signals DCS and GCS to the data drive circuit 120 and the gate drive circuit 130 to control the operations of the data drive circuit 120 and the gate drive circuit 130 .

[0042] The display controller 140 starts scanning according to the timing to be realized in each display frame, switches the input image data input from the outside according to the data signal format used in the data driving circuit 120, outputs the switched image data DATA, and controls data driving at an appropriate time according to the scanning.

[0043] Such a display controller 140 may be a timing controller used in a typical display technology, or may be a control device that also performs other control functions including a timing controller.

[0044] The display controller 140 may be implemented as a separate component from the data driving circuit 120, or may be implemented together with the data driving circuit 120 as an integrated circuit.

[0045] Meanwhile, the data driving circuit 120 may be implemented by including at least one source driver integrated circuit.

[0046] Each source driver integrated circuit may include a shift register, a latch circuit, a digital-to-analog converter (DAC), an output buffer, etc., and in some cases may further include an analog-to-digital converter, etc.

[0047] The gate driving circuit 130 may be implemented by including at least one gate driver integrated circuit.

[0048] Each gate driver integrated circuit may include a shift register, a level shifter, and the like.

[0049] The data driving circuit 120 may be located on only one side (e.g., the top or bottom) of the display panel 110, or in some cases, on both sides (e.g., the top and bottom) of the display panel 110 depending on the driving method, panel design method, etc.

[0050] The gate driving circuit 130 may be located on only one side (e.g., the left or right side) of the display panel 110, or in some cases, on both sides (e.g., the left and right sides) of the display panel 110 depending on the driving method, panel design method, etc.

[0051] Meanwhile, the display panel 110 may be any of various types of display panels, such as a liquid crystal display panel, an organic light-emitting display panel, and a plasma display panel.

[0052] FIG. 3 is a diagram illustrating an example of a touch display device 10 according to an embodiment of the present invention.

[0053] FIG. 3 is a diagram illustrating an example of a grain when the touch panel TSP is built into the display panel 110. In FIG.

[0054] Referring to FIG. 3, the touch circuit 300 may include one or more touch drive circuits TIC for supplying touch drive signals to the touch panel TSP and detecting (receiving) touch sensing signals from the touch panel TSP, and a touch controller TCR for determining the presence and / or position of a touch input using the detection results of the touch sensing signals of the touch drive circuit TIC.

[0055] Each of the one or more touch drive circuits TIC included in the touch circuit 300 may be implemented as a single integrated circuit IC.

[0056] Meanwhile, one or more touch driving circuits TIC included in the touch circuit 300 may be integrated and embodied in one or more integrated integrated circuits SRIC together with one or more source driver integrated circuits SDIC embodying the data driving circuit 120.

[0057] That is, the touch display device 10 may include one or more integrated integrated circuits SRIC, and each integrated integrated circuit SRIC may include a touch driving circuit TIC and a source driver integrated circuit SDIC.

[0058] In this way, the integrated implementation of the touch driving circuit TIC for touch driving and the source driver integrated circuit SDIC for data driving can effectively perform touch driving and data driving when the touch panel TSP is a built-in type that is built into the display panel 110 and the signal lines SL connected to the touch electrodes TE are arranged in parallel to the data lines DL.

[0059] Meanwhile, when the touch panel TSP is a built-in type that is built into the display panel 110, each touch electrode TE may be manufactured in various ways. When a self-capacitance method is applied, the touch electrodes TE may have the arrangement form of the touch electrodes TE shown in Fig. 3. When a mutual capacitance method is applied, the touch electrodes TE may have the arrangement form of the touch electrodes TE shown in Fig. 4.

[0060] When the touch display device 100 is implemented as a type such as a liquid crystal display device, a common electrode to which a common voltage is applied during a display driving period for displaying an image may be divided into a plurality of blocks and used as touch electrodes TE. For example, a touch driving signal may be applied to the touch electrode TE during a touch driving period for touch sensing, or a touch sensing signal may be detected, and the common voltage may be applied to the touch electrode TE during a display driving period for displaying an image.

[0061] In this case, during the display driving period, the touch electrodes TE may all be electrically connected inside the touch circuit 300, and a common voltage may be commonly applied thereto.

[0062] During the touch drive period, some or all of the touch electrodes TE are selected within the touch circuit 300, and a touch drive signal may be applied to one or more selected touch electrodes TE from the touch drive circuit TIC of the touch circuit 300, or a touch sensing signal may be detected by the touch drive circuit TIC of the touch circuit 300.

[0063] Each touch electrode TE may have a number of slits to form an electric field with pixel electrodes in a number of overlapping sub-pixels. The slits are also called holes.

[0064] On the other hand, when the touch display device 10 is implemented as an organic light emitting display device, a plurality of touch electrodes TE and a plurality of signal lines SL may be arranged over the entire surface of the display panel 110 and may be located on an encapsulation layer arranged over a common electrode (e.g., a cathode electrode) to which a common voltage is applied.

[0065] Here, the common electrode arranged on the entire surface of the display panel 110 may be, for example, the cathode electrode of the anode electrode (corresponding to the pixel electrode) and cathode electrode of the organic light emitting diode OLED in each subpixel SP, and the common voltage may be the cathode voltage.

[0066] In this case, each of the touch electrodes TE may be in the form of an electrode without an open area. In this case, each of the touch electrodes TE may be a transparent electrode for light emission in the sub-pixel SP. The open area is also called an opening.

[0067] Alternatively, each of the touch electrodes TE may be a mesh-type electrode having a number of open areas, where each open area in each of the touch electrodes TE may correspond to a light-emitting area of ​​a sub-pixel SP (for example, an area where a part of an anode electrode is located).

[0068] Meanwhile, when the panel driving signal is supplied to the touch electrodes TE and the signal lines SL during the touch driving period, a signal identical to or corresponding to the panel driving signal may be applied to other electrodes and signal lines that may be unrelated to touch sensing. Here, the panel driving signal is also referred to as a touch driving signal output from the touch circuit 300 to sense touch input by a finger and / or the pen 20 or to recognize pen information of the pen 20.

[0069] For example, during the touch drive period, the panel drive signal or a signal corresponding thereto may be applied to all or some of the data lines DL.

[0070] As another example, during the touch drive period, the panel drive signal or a signal corresponding thereto may be applied to all or some of the gate lines GL.

[0071] As yet another example, the panel drive signal or a signal corresponding thereto may be applied to all the touch electrodes TE during the touch drive period.

[0072] Meanwhile, in the embodiment of the present invention, the panel driving signal may refer to all signals applied to the touch panel TSP, the display panel 110, or the display panel 110 incorporating the touch panel TSP.

[0073] Meanwhile, regarding the implementation and arrangement position of the integrated circuit, for example, in the touch display device 10, the integrated integrated circuit SRIC may be mounted on a film, with one end of the film connected to the touch panel TSP and the other end of the film connected to the printed circuit board PCB, in order to electrically connect the touch driving circuit TIC and the source driver integrated circuit SDIC to the display panel 110. In this case, the integrated integrated circuit SRIC may also be called a chip-on-film COF type.

[0074] A touch controller TCR can be mounted on the printed circuit board PCB connected to the film on which the integrated integrated circuit SRIC is mounted.

[0075] Meanwhile, the integrated integrated circuit SRIC can also be realized as a chip-on-glass COG type that is bonded onto the touch panel TSP.

[0076] Meanwhile, one or more of the touch driving circuits TIC and the touch controller TCR of the touch circuit 300 may be integrated into one component.

[0077] FIG. 4 is a diagram illustrating an exemplary touch sensing portion for mutual capacitance-based touch sensing in a touch display device according to an embodiment of the present invention.

[0078] Referring to FIG. 4, the touch display device 10 can sense the presence or absence of a touch by a finger and / or a pen 20 or the touch position through a capacitance-based touch sensing technique.

[0079] For this reason, as shown in FIG. 4, the touch display device 10 may include a touch panel TSP on which a number of touch electrodes TE are arranged, and a touch circuit 300 for driving the touch panel TSP.

[0080] The touch display device 10 may provide a mutual capacitance-based touch sensing function that senses a touch input by measuring the capacitance formed between the two touch electrodes Tx_TE and Rx_TE or a change therein.

[0081] 4, for mutual capacitance-based touch sensing, the touch panel TSP may have first touch electrode lines TL1 to TL5 to which touch driving signals are applied and second touch electrode lines RL1 to RL6 to which touch sensing signals are sensed, arranged to cross each other. The first touch electrode lines are also called touch driving lines, and the second touch electrode lines are also called touch sensing lines.

[0082] Each of the first touch electrode lines TL1 to TL5 may be a single bar-shaped electrode extending in the horizontal direction, and each of the second touch electrode lines RL1 to RL6 may be a single bar-shaped electrode extending in the vertical direction.

[0083] Alternatively, as shown in FIG. 4, each of the first touch electrode lines TL1 to TL5 may be formed by electrically connecting the first touch electrodes Tx_TE arranged in the same row, and each of the second touch electrode lines RL1 to RL6 may be formed by electrically connecting the second touch electrodes Rx_TE arranged in the same column. The first touch electrodes Tx_TE are also called transmitting touch electrodes Tx_TE or touch driving electrodes. The second touch electrodes Rx_TE are also called receiving touch electrodes Rx_TE or touch sensing electrodes. However, this is merely an example, and the second touch electrodes Rx_TE may be transmitting touch electrodes Tx_TE or touch driving electrodes, and the first touch electrodes Tx_TE may be receiving touch electrodes Rx_TE or touch sensing electrodes.

[0084] For example, a touch drive signal for finger touch sensing generated in touch circuit 300 may be supplied to the touch drive electrode. A touch sensing signal generated based on a change in capacitance between the touch drive electrode and the touch sensing electrode due to a finger touch can be provided from the touch sensing electrode to touch circuit 300 via a touch sensing line.

[0085] Each of the first touch electrode lines TL1 to TL5 can be electrically connected to the touch circuit 300 through one or more signal lines SL. Each of the second touch electrode lines RL1 to RL6 can be electrically connected to the touch circuit 300 through one or more signal lines SL. The signal lines SL can include the first touch electrode lines TL1 to TL5 and the second touch electrode lines RL1 to RL6.

[0086] The shape of one touch electrode TE shown in FIG. 4 is merely an example, and various designs are possible.

[0087] Furthermore, the size of the area where one touch electrode TE is formed can also correspond to the size of the area where one subpixel is formed.

[0088] Alternatively, the size of the area where one touch electrode TE is formed may be larger than the size of the area where one subpixel is formed, in which case one touch electrode TE can overlap with two or more data lines and two or more gate lines.

[0089] For example, the size of the area where one touch electrode TE is formed can correspond to the size of several to several tens of sub-pixel areas.

[0090] Meanwhile, the touch panel TSP may be an external type that is manufactured separately from the display panel 110 and coupled to the display panel 110, or an internal type that is built into the display panel 110. The external type is also called an add-on type, and the internal type is sometimes called an in-cell type or an on-cell type.

[0091] When the touch panel TSP is built into the display panel 110, the touch electrodes TE may be formed together with other electrodes and signal wirings related to display driving when the display panel 110 is manufactured.

[0092] FIG. 5 is a diagram showing drive timings illustrating a time division drive method for display drive and touch drive of the touch display device 10 according to the embodiment.

[0093] Referring to FIG. 5, the touch display device 10 according to an embodiment of the present invention can perform "display driving" for displaying an image and "touch driving (finger touch driving and / or pen touch driving)" for sensing touch by a finger and / or a pen 20 (finger touch and / or pen touch) in a time-division manner.

[0094] In the touch display device 10, the display drive period D and the touch drive period T are allocated alternately.

[0095] During the display drive period D, display drive progresses and an image is displayed, and during the touch drive period T, touch drive (finger touch drive and / or pen touch drive) progresses and finger touch or pen touch is sensed.

[0096] In the case of such a time division driving method, the touch driving period T may be a blank period in which the display is not driven.

[0097] Meanwhile, the touch display device 10 generates a synchronization signal TSYNC that swings between a high level and a low level, and can use the synchronization signal TSYNC to distinguish and control the display driving period D and the touch driving period T. That is, the synchronization signal TSYNC is a driving timing control signal that defines the touch driving period T.

[0098] For example, a high level section (or a low level section) of the synchronization signal TSYNC may indicate a touch driving period T, and a low level section (or a high level section) of the synchronization signal TSYNC may indicate a display driving period D.

[0099] Meanwhile, one display frame period may include one display driving period and one touch driving period, in which case, after one display frame screen is displayed, touch driving may proceed.

[0100] Alternatively, one display frame period may include two or more display drive periods and two or more touch drive periods.

[0101] 5, one display frame period may include 16 display driving periods D1 to D16 and 16 touch driving periods T1 to T16. In this case, one display frame screen is divided into 1 / 16 sections and displayed, and touch driving may proceed for each section.

[0102] FIG. 6 is a diagram illustrating a driving timing diagram showing an independent driving method for the display driving and the touch driving of the touch display device 10 according to an embodiment of the present invention.

[0103] Referring to FIG. 6, the touch display device 10 according to an embodiment of the present invention can independently perform a "display drive" for displaying an image and a "touch drive (finger touch drive and / or pen touch drive)" for sensing a touch by a finger and / or a pen 20 (finger touch and / or pen touch).

[0104] In this case, the display driving and the touch driving can proceed in different time periods, or can proceed simultaneously in the same time period, as shown in Figure 6. Alternatively, they can proceed in a time-division manner and then proceed simultaneously at a certain timing.

[0105] When the display drive and the touch drive proceed independently, the touch drive can proceed independently of the display drive, and conversely, the display drive can proceed independently of the touch drive.

[0106] In the touch display device 10, the display drive period D and the touch drive period T are allocated alternately.

[0107] For example, when the display driving and the touch driving are performed simultaneously, the touch driving may be performed while an image is displayed by the display driving, and a finger touch or a pen touch may be sensed.

[0108] When the display drive and the touch drive proceed independently, the display drive period can be controlled by a normal display drive control signal (e.g., a vertical synchronization signal Vsync), and the touch drive period can be controlled by a synchronization signal TSYNC.

[0109] In this case, the synchronization signal TSYNC can define only the touch driving period T, unlike the synchronization signal TSYNC of FIG. 6 which defines the display driving period D and the touch driving period T separately.

[0110] For example, the period when the synchronization signal TSYNC is at a high level (or a low level) can indicate a touch drive period T during which touch drive is performed, and the period when the synchronization signal TSYNC is at a low level (or a high level) can indicate a period during which touch drive is not performed.

[0111] Meanwhile, finger touch and / or pen touch can be sensed once across the entire screen during one high level period (or one low level period) of the synchronization signal TSYNC, i.e., one touch drive period, in which case one touch drive period corresponds to one touch frame period.

[0112] Alternatively, a finger touch and / or a pen touch may be sensed once across the entire screen during two or more high level periods (or low level periods) of the synchronization signal TSYNC, i.e., two or more touch drive periods. In this case, two or more touch drive periods may correspond to one touch frame period.

[0113] For example, a finger touch and / or a pen touch can be sensed once across the entire screen during 16 high-level periods (or low-level periods) of the synchronization signal TSYNC, i.e., 16 touch drive periods. In this case, the 16 touch drive periods can correspond to one touch frame period.

[0114] On the other hand, during each of the touch drive periods T, finger touch drive for sensing a finger touch may proceed, or pen touch drive for sensing a pen touch may proceed.

[0115] Furthermore, the touch panel TSP may be built into the display panel 110, or may be located outside the display panel 110. For ease of explanation, the following description will be given taking the case where the touch panel TSP is built into the display panel 110 as an example, and the touch panel TSP will also be simply referred to as the panel TSP.

[0116] FIG. 7 is a diagram illustrating a touch driving operation between the touch display device 10 and the pen 20 according to an embodiment of the present invention.

[0117] During pen touch driving for sensing a pen touch, the touch circuit 300 of the touch display device 10 transmits and receives signals to and from the pen 20 via the touch panel TSP.

[0118] A signal supplied from the touch circuit 300 to the touch panel TSP and transmitted to the pen 20 via the touch panel TSP is called an uplink signal, and a signal output from the pen 20 to the touch panel TSP and transmitted to the touch circuit 300 via the touch panel TSP is called a downlink signal.

[0119] The method and timing of transmitting and receiving signals between the touch display device 10 and the pen 20 for pen touch driving and pen touch sensing therethrough, as well as the format of the transmitted and received signals, are predefined by a protocol, and such a protocol is embodied as a program or code or data related to program execution, and can be stored in the touch circuit 300 and the pen 20 or executed by the touch circuit 300 and the pen 20.

[0120] For pen touch driving to sense pen touch, the touch display device 10 can define the linked operation between the touch display device 10 and the pen 20, control the driving operation of the pen 20, and provide the pen 20 with an uplink signal including various information required for the driving operation of the pen 20.

[0121] More specifically, the touch circuit 300 of the touch display device 100 supplies an uplink signal to one or more of the touch electrodes TE included in the touch panel TSP, so that the stylus 20 adjacent to the touch panel TSP can receive the uplink signal through one or more of the touch electrodes TE included in the touch panel TSP.

[0122] In response to an uplink signal transmitted from the touch display device 10, the pen 20 can output a downlink signal that enables the touch circuit 300 to sense the pen coordinates (also called position) and / or pen tilt (also called tilt for short) for the pen 20.

[0123] Alternatively, the pen 20 can output a downlink signal indicating various additional information in response to an uplink signal transmitted from the touch display device 10 .

[0124] In this manner, the downlink signal output from the pen 20 may be applied to one or more of the multiple touch electrodes TE included in the touch panel TSP.

[0125] The touch circuit 300 of the touch display device 10 receives a downlink signal output from the pen 20 through one or more touch electrodes TE, and can sense the pen coordinates and / or pen tilt of the pen 20 or recognize various additional information about the pen 20 based on the received downlink signal.

[0126] Such uplink signals may include, by way of example, beacons or ping signals.

[0127] The beacon is a control signal that defines the linked operation between the touch display device 10 and the pen 20, controls the driving operation of the pen 20, and includes various information required for the driving operation of the pen 20.

[0128] For example, the beacon may include one or more of panel information (e.g., panel status information, panel identification information, panel type information such as in-cell type, etc.), panel driving mode information (e.g., mode identification information such as pen search mode, pen mode, etc.), downlink signal characteristic information (e.g., frequency, number of pulses, etc.), driving timing related information, multiplexer driving information, power mode information (e.g., LHB information that the panel and pen cannot be driven to reduce power consumption, etc.), etc., and may further include information for driving synchronization between the display touch panel TSP and the pen 20.

[0129] The ping signal may be a synchronization control signal for synchronization of the downlink signal.

[0130] The additional information included in the downlink signal may include, for example, one or more of pen pressure, pen ID, button information, battery information, information for checking and correcting information errors, and the like.

[0131] FIG. 8 is an exemplary diagram illustrating a driving timing for a touch driving operation between the touch display device 10 and the pen 20 according to an embodiment of the present invention.

[0132] 8, 16 touch drive periods T1 to T16 are regularly repeated as an example. In this case, the 16 touch drive periods T1 to T16 can be set as one touch frame period, and both finger touch and pen touch may be sensed during one touch frame period.

[0133] FIG. 8 shows downlink signals output from the pen 20 at timings predetermined by the protocol, and various signals (including uplink signals) supplied by the touch circuit 300 to the touch panel TSP.

[0134] 8, during one touch frame period corresponding to 16 touch drive periods T1 to T16, a beacon, which is one of the uplink signals, may be transmitted from the touch panel TSP to the stylus 20 once or twice or more times, and the beacon transmission period may be one or more touch drive periods (T1 in the example of FIG. 8) among the 16 touch drive periods T1 to T16 that are predetermined by a protocol. The period during which the beacon is supplied to the touch panel TSP may occur during a blank period during which display driving is not performed. However, the period during which the beacon is supplied to the touch panel TSP may also occur during an active period during which display driving is performed.

[0135] On the other hand, a beacon may be transmitted periodically every one touch frame period, or every two or more touch frame periods, or a beacon may be transmitted in any touch frame period upon the occurrence of a predetermined event, etc.

[0136] When a beacon is transmitted from the touch panel TSP to the pen 20, the pen 20 can respond to the beacon and output a downlink signal at a predetermined touch drive period (T2, T3, T5, T6, T7, T9, T13, T14, T15 in the example of Figure 8) according to a predefined protocol.

[0137] The downlink signal output from the pen 20 may be a downlink signal that enables the touch display device 10 to sense the pen coordinate (position) and pen tilt of the pen 20 .

[0138] For example, one downlink signal output from the pen 20 may be a downlink signal that enables the touch display device 10 to sense either the pen coordinates or the pen tilt of the pen 20, or may be a downlink signal that enables the touch display device 10 to sense both the pen coordinates and the pen tilt of the pen 20.

[0139] Furthermore, the downlink signal output from the pen 20 may be a downlink signal indicating data including various additional information of the pen 20. Here, the data includes various additional information of the pen 20, and the various additional information may include, for example, writing pressure, pen ID, button information, battery information, information for checking and correcting information errors, etc.

[0140] The downlink signal output from the pen 20 may be applied to one or more of the touch electrodes TE included in the touch panel TSP.

[0141] Meanwhile, referring to FIG. 8, 16 touch driving periods T1 to T16 included in one touch frame period may include one or more touch driving periods T2, T5, T9, and T13 for sensing one or more of the pen coordinates and the pen tilt.

[0142] In accordance with the touch driving periods T2, T5, T9, and T13, the pen 20 can output a downlink signal related to sensing of at least one of the pen coordinates and the pen tilt.

[0143] In this case, the downlink signal may be a signal consisting of pulses that periodically swing between a high level and a low level.

[0144] Also, referring to FIG. 8, the 16 touch drive periods T1 to T16 included in one touch frame period may include one or more touch drive periods T3, T6, T7, T14, and T15 in which data can be sensed.

[0145] In accordance with these touch driving periods T3, T6, T7, T14, and T15, the pen 20 can output a downlink signal related to data sensing.

[0146] In this case, the downlink signal may be a signal consisting of aperiodic pulses representing additional information included in the corresponding data.

[0147] As described above, when a downlink signal is output from the pen 20 in accordance with the touch drive period defined in the protocol, the touch circuit 300 receives the downlink signal through the touch panel TSP and can perform pen sensing processing based on the received downlink signal.

[0148] Here, the pen sensing process may include one or more of a process of sensing pen coordinates, a process of sensing pen tilt, and a process of recognizing pen additional information included in data Data.

[0149] Meanwhile, the 16 touch drive periods T1 to T16 included in one touch frame period may include one or more touch drive periods (for example, T4, T6, T10, T11, T12, and T16) for sensing a finger touch.

[0150] During such one or more touch drive periods (e.g., T4, T6, T10, T11, T12, T16), the touch circuit 300 can supply a touch drive signal DS for sensing a finger touch to all or some of the multiple touch electrodes TE included in the touch panel TSP.

[0151] Such a touch drive signal DS may be a signal that swings between a high level and a low level, that is, the touch drive signal DS may be a modulated signal whose voltage level is variable.

[0152] Meanwhile, among the touch drive periods T1, T2, T3, T5, T6, T7, T9, T13, T14, and T15 for sensing a pen touch, the touch circuit 300 can supply a DC voltage of a constant voltage level to the touch panel TSP during the remaining touch drive periods T2, T3, T5, T6, T7, T9, T13, T14, and T15, excluding the touch drive period T1 corresponding to the beacon transmission period.

[0153] Here, the DC voltage may be a low-level voltage such as the touch drive signal DS and the beacon, a high-level voltage, any voltage between the low-level voltage and the high-level voltage, or a ground voltage.

[0154] 8, touch driving performed during touch driving periods T1, T2, T3, T5, T6, T7, T9, T13, T14, and T15 for sensing pen touches is referred to as pen touch driving PD, and touch driving periods T4, T6, T10, T11, T12, and T16 for sensing finger touches is referred to as finger touch driving FD.

[0155] FIG. 9 is a diagram relating to pen touch driving and finger touch driving that are performed during one frame period Frame according to an embodiment of the present disclosure.

[0156] FIG. 10 is a diagram of an uplink signal U provided to a touch electrode TE according to an embodiment of the present disclosure.

[0157] FIG. 11 is a diagram showing an abnormal phenomenon occurring in a display panel 110 according to an embodiment of the present disclosure.

[0158] 9, one frame period (Frame) may include an active period (Ta) and a blank period (Tb). The active period (Ta) and the blank period (Tb) may be distinguished by a vertical synchronization signal. The active period (Ta) may correspond to a display driving period, and the blank period (Tb) may correspond to a period during which the display is not driven.

[0159] The pen signal S_Pen can include an uplink signal U and a downlink signal D.

[0160] During the blank period Tb, the uplink signal U may be supplied from the touch circuit 300 to the touch panel TSP. When the uplink signal U is supplied to the entire touch panel TSP at the same time, this can be called global driving. When the uplink signal U is supplied to a part of the touch panel TSP, this can be called local driving.

[0161] During the active period Ta, a downlink signal D may be supplied from the pen 20 to the touch panel TSP.

[0162] The finger signal S_Finger may include the finger touch drive signal F.

[0163] During the active period Ta, the finger touch drive signal F may be supplied from the touch circuit 300 to the touch panel TSP.

[0164] When the touch display device 10 is driven at 120 Hz, one frame period Frame may be 8.3 ms, in which case the active period Ta may be 7.96 ms, and the blank period Tb may be 0.34 ms.

[0165] When the touch display device 10 is driven at 120 Hz, the pen signal S_Pen may be supplied to the touch panel TSP in synchronization with 240 Hz. Since the uplink signal U is supplied during the blank period Tb, the period during which the uplink signal U is supplied may be less than 0.34 ms.

[0166] When the touch display device 10 is driven at 120 Hz, the finger signal S_Finger may be supplied to the touch panel TSP in synchronization with 240 Hz. The duration during which the finger signal S_Finger is supplied during the active period Ta may be 1.2 ms.

[0167] On the other hand, the drive for supplying the uplink signal U during the blank period Tb may be the first global drive Global1, and the drive for supplying the uplink signal U during the active period Ta may be the second global drive Global2.

[0168] Referring to FIG. 10, the touch electrode TE shown in FIG. 10 may be the same as the touch electrode TE shown in FIG.

[0169] 10, the transmitting touch electrode Tx_TE may include a first transmitting electrode 1011 to an eighth transmitting electrode 1018. The receiving touch electrode Rx_TE may include a first receiving electrode 1021 to an eighth receiving electrode 1028.

[0170] The transmitting touch electrode Tx_TE may be supplied with a number of transmission electrode uplink signals ULS_tx. The a-th (where a is a natural number) transmission electrode uplink signal may be supplied to the a-th transmission electrode. For example, the first transmission electrode uplink signal ULS_tx1 may be supplied to the first transmission electrode 1011, and the eighth transmission electrode uplink signal ULS_tx8 may be supplied to the eighth transmission electrode 1018. The first transmission electrode 1011 to the eighth transmission electrode 1018 may be supplied with the same number of transmission electrode uplink signals ULS_tx.

[0171] The receiving touch electrode Rx_TE may be supplied with multiple receiving electrode uplink signals ULS_rx. The a-th receiving electrode uplink signal may be supplied to the a-th receiving electrode. For example, the first receiving electrode uplink signal ULS_tx1 may be supplied to the first receiving electrode 1021, and the eighth receiving electrode uplink signal ULS_tx8 may be supplied to the eighth receiving electrode 1028. The first receiving electrode 1021 to the eighth receiving electrode 1028 may be supplied with the same multiple receiving electrode uplink signals ULS_rx.

[0172] The uplink signal ULS_tx for the multiple transmitting electrodes may be an AC signal. The uplink signal ULS_tx for the multiple transmitting electrodes may be a signal that alternates between a high voltage level and a low voltage level. The uplink signal ULS_tx for the multiple transmitting electrodes may be a signal that maintains a high voltage level during a first period and a low voltage level during a second period. The lengths of the first period and the second period may be different from each other, or may be the same as each other depending on the design. The uplink signal ULS_rx for the multiple receiving electrodes may be the same as the uplink signal ULS_tx for the multiple transmitting electrodes. The uplink signal ULS_tx for the multiple transmitting electrodes and the uplink signal ULS_rx for the multiple receiving electrodes may be included in the uplink signal U shown in FIG. 9.

[0173] The display drive period and the uplink signal transmission period can be driven in different periods, which can be called “time-division drive.” The display drive period and the uplink signal transmission period can be driven independently of each other in terms of time, which can be called “simultaneous drive.”

[0174] When the display driving period and the uplink signal transmission period are driven in a time-division manner, the uplink signal U may be supplied to the touch panel TSP during the blank period Tb. When the display driving period and the uplink signal transmission period are driven in a time-division manner, the display driving period and the uplink signal transmission period proceed in separate periods, so the uplink signal U does not affect the display driving.

[0175] 9, when the display driving period and the uplink signal transmission period are driven in a time-division manner, the uplink signal U may be supplied to the touch panel TSP via the first global driving Global 1. When the uplink signal U is supplied to the touch panel TSP via the first global driving Global 1, the uplink signal U does not affect the display driving.

[0176] When the display driving period and the uplink signal transmission period proceed simultaneously, the display driving period and the uplink signal transmission period may proceed independently of each other. Therefore, the period during which the uplink signal U is supplied to the touch panel TSP may be a blank period Tb or an active period Ta.

[0177] 9, when the display driving period and the uplink signal transmission period proceed simultaneously, the uplink signal U may be supplied to the touch panel TSP via the first global driving Global1 or the second global driving Global2. In the case of the second global driving Global2, the uplink signal U may be supplied to the touch panel TSP during the active period Ta. The uplink signal U supplied to the touch electrode TE can affect the driving of the display.

[0178] 11, the touch electrode TE and the cathode electrode CE may be coupled by a parasitic capacitance Cpara. The cathode electrode CE may also be referred to as a common electrode. An uplink signal U supplied to the touch electrode TE may affect the cathode electrode CE. That is, when the uplink signal U is supplied to the touch panel TSP during the active period Ta, the cathode electrode CE may be affected by the uplink signal U supplied to the touch electrode TE.

[0179] The voltage supplied to the cathode electrode CE may be affected by the uplink signal U supplied to the touch electrode TE. Fluctuations in the voltage supplied to the cathode electrode CE may affect the data voltage Vdata supplied through the data line DL. As a result, referring to FIG. 11, an abnormal phenomenon may occur in the display panel 110. The abnormal phenomenon occurring in the display panel 110 may appear in the form of lines, dots, unevenness, etc. In other words, the quality of the display panel 110 may be degraded.

[0180] Therefore, the embodiments of the present disclosure can provide a touch display device that can simultaneously perform pen touch driving and display driving, and a driving method for the touch display device.

[0181] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device, which can prevent the influence of pen touch driving on display driving.

[0182] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device, which can prevent abnormal phenomena from occurring in the display panel 110.

[0183] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device that can improve pen touch performance.

[0184] The embodiments of the present disclosure can provide a touch display device and a driving method for the touch display device that can reduce power consumption by preventing abnormal phenomena from occurring in the display panel 110.

[0185] FIG. 12 is a diagram of an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure.

[0186] 13 and 14 are diagrams relating to a first waveform signal and a second waveform signal according to an embodiment of the present disclosure.

[0187] The touch electrode TE shown in FIG. 12 may be the same as the touch electrode TE shown in FIG.

[0188] 12, the transmit touch electrode Tx_TE may include a plurality of transmit electrodes 1210. The plurality of transmit electrodes 1210 may include a first transmit electrode 1221 to an eighth transmit electrode 1228. For convenience of explanation, the plurality of transmit electrodes 1210 is illustrated as being eight, but the plurality of transmit electrodes 1210 may include eight or more transmit electrodes. The plurality of transmit electrodes 1210 may be touch drive electrodes.

[0189] 12, the receiving touch electrode Rx_TE may include a plurality of receiving electrodes 1220. The plurality of receiving electrodes 1220 may include first receiving electrode 1221 to eighth receiving electrode 1228. For convenience of explanation, the plurality of receiving electrodes 1220 is illustrated as being eight, but the plurality of receiving electrodes 1220 may include eight or more receiving electrodes. The plurality of receiving electrodes 1220 may be touch sensing electrodes.

[0190] The transmitting touch electrode Tx_TE may be supplied with a plurality of transmit-electrode uplink signals ULS_tx, which may include a first transmit-electrode uplink signal ULS_tx1 to an eighth transmit-electrode uplink signal ULS_tx8.

[0191] The receiving touch electrode Rx_TE may be supplied with a plurality of receiving-electrode uplink signals ULS_rx, which may include a first receiving-electrode uplink signal ULS_tx1 to an eighth receiving-electrode uplink signal ULS_tx8.

[0192] The uplink signals ULS_tx for the multiple transmitting electrodes may be AC ​​signals. The uplink signals ULS_tx for the multiple transmitting electrodes may have various forms, such as a sine wave, a triangular wave, or a square wave. The uplink signals ULS_tx for the multiple transmitting electrodes may be signals that alternate between a high voltage level and a low voltage level. The uplink signals ULS_tx for the multiple transmitting electrodes may be signals that maintain a high voltage level during a first period and a low voltage level during a second period. The lengths of the first period and the second period may be different from each other, or may be the same as each other depending on the design. The uplink signals ULS_rx for the multiple receiving electrodes may be the same as the uplink signals ULS_tx for the multiple transmitting electrodes.

[0193] Referring to FIG. 12, some of the multiple uplink signals ULS_tx for transmitting electrodes may have a first waveform signal WF1, and the remaining signals of the multiple uplink signals ULS_tx for transmitting electrodes may have a second waveform signal WF2.

[0194] Referring to FIG. 12, some of the uplink signals ULS_rx for the multiple receiving electrodes may have the first waveform signal WF1, and the remaining signals of the uplink signals ULS_rx for the multiple receiving electrodes may have the second waveform signal WF2.

[0195] 13 and 14, the first waveform signal WF1 and the second waveform signal WF2 may have mutually inverted signal forms, and the second waveform signal WF2 may be an opposite-phase signal to the first waveform signal WF1.

[0196] 13 and 14, the waveforms of first waveform signal WF1 and second waveform signal WF2 may be determined according to the bit value. For example, if the bit value changes irregularly, first waveform signal WF1 and second waveform signal WF2 may be AC ​​signals that alternate between a high voltage level VH and a low voltage level VL at an irregular interval. Alternatively, if the bit value alternates regularly, first waveform signal WF1 and second waveform signal WF2 may be AC ​​signals that alternate between a high voltage level VH and a low voltage level VL at a regular interval.

[0197] Referring to FIG. 13, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals that alternate between high and low voltage levels at irregular intervals.

[0198] Referring to FIG. 13, during the first period T1, which is the period between the first time point t1 and the second time point t2, the first waveform signal WF1 may be in a high voltage level VH state, and the second waveform signal WF2 may be in a low voltage level VL state.

[0199] Referring to FIG. 13, during the second period T2, which is the period between the second time point t2 and the third time point t3, the first waveform signal WF1 may be in a low voltage level VL state, and the second waveform signal WF2 may be in a high voltage level VH state.

[0200] Referring to FIG. 13, during the third period T3, which is the period between the third time point t3 and the fourth time point t5, the first waveform signal WF1 may be in a high voltage level VH state, and the second waveform signal WF2 may be in a low voltage level VL state.

[0201] Referring to FIG. 13, during the fourth period T4, which is the period between the fourth time point t4 and the fifth time point t5, the first waveform signal WF1 may be in a low voltage level VL state, and the second waveform signal WF2 may be in a high voltage level VH state.

[0202] Referring to FIG. 13, during the fifth period T5, which is the period between the fifth time point t5 and the sixth time point t6, the first waveform signal WF1 may be in a high voltage level VH state, and the second waveform signal WF2 may be in a low voltage level VL state.

[0203] Referring to FIG. 13, during the sixth period T6, which is the period between the sixth time point t6 and the seventh time point t7, the first waveform signal WF1 may be in a low voltage level VL state, and the second waveform signal WF2 may be in a high voltage level VH state.

[0204] 13, the lengths of the first to sixth periods T1 to T6 may be different from one another. That is, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals that alternate between a high voltage level VH and a low voltage level VL at irregular intervals. Furthermore, the first waveform signal WF1 and the second waveform signal WF2 may have mutually inverted signal forms.

[0205] Referring to FIG. 14, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals that alternate between a high voltage level VH and a low voltage level VL at regular intervals.

[0206] Referring to FIG. 14, during a first period T1′, which is the period between a first time point t1′ and a second time point t2′, the first waveform signal WF1 may be in a high voltage level VH state, and the second waveform signal WF2 may be in a low voltage level VL state.

[0207] Referring to FIG. 14, during the second period T2′, which is the period between the second time point t2′ and the third time point t3′, the first waveform signal WF1 may be in the low voltage level VL state, and the second waveform signal WF2 may be in the high voltage level VH state.

[0208] Referring to FIG. 14, during the third period T3′, which is the period between the third time point t3′ and the fourth time point t5′, the first waveform signal WF1 may be in the high voltage level VH state, and the second waveform signal WF2 may be in the low voltage level VL state.

[0209] Referring to FIG. 14, during the fourth period T4′, which is the period between the fourth time point t4′ and the fifth time point t5′, the first waveform signal WF1 may be in a low voltage level VL state, and the second waveform signal WF2 may be in a high voltage level VH state.

[0210] Referring to FIG. 14, during the fifth period T5′, which is the period between the fifth time point t5′ and the sixth time point t6′, the first waveform signal WF1 may be in a high voltage level VH state, and the second waveform signal WF2 may be in a low voltage level VL state.

[0211] Referring to FIG. 14, during the sixth period T6′, which is the period between the sixth time point t6′ and the seventh time point t7, the first waveform signal WF1 may be in a low voltage level VL state, and the second waveform signal WF2 may be in a high voltage level VH state.

[0212] 14, the first to sixth periods T1' to T6' may have the same length. That is, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals that alternate between a high voltage level VH and a low voltage level VL at regular intervals. Furthermore, the first waveform signal WF1 and the second waveform signal WF2 may have mutually inverted signal forms.

[0213] 12, during an uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to the transmitting touch electrode Tx_TE, and during an uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to the receiving touch electrode Rx_TE.

[0214] 12, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be supplied to the odd-numbered transmitting electrodes 1211, 1213, 1215, and 1217.

[0215] 12, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be supplied to the even-numbered transmitting electrodes 1212, 1214, 1216, and 1218.

[0216] 12, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be supplied to the odd-numbered receiving electrodes 1221, 1223, 1225, and 1227.

[0217] 12, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be supplied to the even-numbered receiving electrodes 1212, 1214, 1216, and 1218.

[0218] The first waveform signal WF1 and the second waveform signal WF2 are alternately supplied to the touch electrode TE, thereby preventing an abnormal phenomenon in which the uplink signal U affects the display driving.

[0219] 15 to 22 are diagrams relating to an uplink signal U supplied to a touch electrode TE according to an embodiment of the present disclosure.

[0220] Referring to FIG. 15, the display device 100 can be driven by a local driving method.

[0221] 15, during an uplink signal transmission period, a first waveform signal WF1 and a second waveform signal WF2 may be alternately supplied to the transmitting touch electrode Tx_TE, while during an uplink signal transmission period, a signal other than the uplink signal U may be supplied to the receiving touch electrode Rx_TE.

[0222] 15, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be supplied to the odd-numbered transmitting electrodes 1211, 1213, 1215, and 1217.

[0223] 15, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be supplied to the even-numbered transmitting electrodes 1212, 1214, 1216, and 1218.

[0224] 15, the uplink signal U may be supplied only to the transmitting touch electrode Tx_TE, and a signal other than the uplink signal U may be supplied to the receiving touch electrode Rx_TE. A DC voltage or a ground voltage may be supplied to the receiving touch electrode Rx_TE, or the receiving touch electrode Rx_TE may be maintained in a floating state.

[0225] Referring to FIG. 15, the display device 100 is driven by the local driving method, thereby reducing power consumption.

[0226] Referring to FIG. 16, the display device 100 can be driven by a local driving method.

[0227] 16, during an uplink signal transmission period, a first waveform signal WF1 and a second waveform signal WF2 may be alternately supplied to the receiving touch electrode Rx_TE, while during an uplink signal transmission period, a signal other than the uplink signal U may be supplied to the transmitting touch electrode Tx_TE.

[0228] 16, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be supplied to the odd-numbered receiving electrodes 1221, 1223, 1225, and 1227.

[0229] 16, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be supplied to the even-numbered receiving electrodes 1212, 1214, 1216, and 1218.

[0230] 16, the uplink signal U may be supplied only to the receiving touch electrode Rx_TE, and a signal other than the uplink signal U may be supplied to the transmitting touch electrode Tx_TE. A DC voltage or a ground voltage may be supplied to the transmitting touch electrode Tx_TE, or the transmitting touch electrode Tx_TE may be maintained in a floating state.

[0231] Referring to FIG. 16, the display device 100 can be driven by the local driving method, thereby reducing power consumption.

[0232] Referring to FIG. 17, the display device 100 can be driven by a local driving method.

[0233] 17, during an uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to some of the transmitting touch electrodes Tx_TE, while during the uplink signal transmission period, a signal other than the uplink signal U may be supplied to the remaining transmitting touch electrodes Tx_TE and receiving touch electrodes Rx_TE.

[0234] 17, the uplink signal ULS_tx1 for the first transmitting electrode and the uplink signal ULS_tx3 for the third transmitting electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx1 for the first transmitting electrode may be supplied to the first transmitting electrode 1211, and the uplink signal ULS_tx3 for the third transmitting electrode may be supplied to the third transmitting electrode 1213.

[0235] 17, the uplink signal ULS_tx2 for the second transmitting electrode and the uplink signal ULS_tx4 for the fourth transmitting electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx2 for the second transmitting electrode may be supplied to the second transmitting electrode 1212, and the uplink signal ULS_tx4 for the fourth transmitting electrode may be supplied to the fourth transmitting electrode 1214.

[0236] 17, the uplink signal U may be supplied to only some of the transmitting electrodes 1211, 1212, 1213, and 1214, and a signal other than the uplink signal U may be supplied to the remaining transmitting electrodes 1215, 1216, 1217, and 1218 and the receiving touch electrode Rx_TE. A DC voltage or a ground voltage may be supplied to the remaining transmitting electrodes 1215, 1216, 1217, and 1218 and the receiving touch electrode Rx_TE. Alternatively, the remaining transmitting electrodes 1215, 1216, 1217, and 1218 and the receiving touch electrode Rx_TE may be maintained in a floating state.

[0237] Referring to FIG. 17, the display device 100 can be driven by the local driving method, thereby reducing power consumption.

[0238] Referring to FIG. 18, the display device 100 can be driven by a local driving method.

[0239] 18, during an uplink signal transmission period, a first waveform signal WF1 and a second waveform signal WF2 may be alternately supplied to some receiving touch electrodes Rx_TE, while during an uplink signal transmission period, a signal other than the uplink signal U may be supplied to the remaining receiving touch electrodes Rx_TE and transmitting touch electrodes Tx_TE.

[0240] 18, the uplink signal ULS_rx1 for the first receiving electrode and the uplink signal ULS_rx3 for the third receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1221, and the uplink signal ULS_rx3 for the third receiving electrode may be supplied to the third receiving electrode 1223.

[0241] 18, the uplink signal ULS_rx2 for the second receiving electrode and the uplink signal ULS_rx4 for the fourth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx2 for the second receiving electrode may be supplied to the second receiving electrode 1222, and the uplink signal ULS_rx4 for the fourth receiving electrode may be supplied to the fourth receiving electrode 1224.

[0242] 18, the uplink signal U may be supplied to only some of the receiving electrodes 1221, 1222, 1223, and 1224, and a signal other than the uplink signal U may be supplied to the remaining receiving electrodes 1225, 1226, 1227, and 1228 and the transmitting touch electrode Tx_TE. A DC voltage or a ground voltage may be supplied to the remaining receiving electrodes 1225, 1226, 1227, and 1228 and the transmitting touch electrode Tx_TE. Alternatively, the remaining receiving electrodes 1225, 1226, 1227, and 1228 and the transmitting touch electrode Tx_TE may be maintained in a floating state.

[0243] Referring to FIG. 18, the display device 100 can be driven by the local driving method, thereby reducing power consumption.

[0244] 19, during an uplink signal transmission period, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the transmitting touch electrode Tx_TE, and during an uplink signal transmission period, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the receiving touch electrode Rx_TE.

[0245] 19, the uplink signal ULS_tx1 for the first transmitting electrode and the uplink signal ULS_tx2 for the second transmitting electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx1 for the first transmitting electrode may be supplied to the first transmitting electrode 1211, and the uplink signal ULS_tx2 for the second transmitting electrode may be supplied to the second transmitting electrode 1212.

[0246] 19, the uplink signal ULS_tx3 for the third transmitting electrode and the uplink signal ULS_tx4 for the fourth transmitting electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx3 for the third transmitting electrode may be supplied to the third transmitting electrode 1213, and the uplink signal ULS_tx4 for the fourth transmitting electrode may be supplied to the fourth transmitting electrode 1214.

[0247] 19, the uplink signal ULS_tx5 for the fifth transmitting electrode and the uplink signal ULS_tx6 for the sixth transmitting electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx5 for the fifth transmitting electrode may be supplied to the fifth transmitting electrode 1215, and the uplink signal ULS_tx6 for the sixth transmitting electrode may be supplied to the sixth transmitting electrode 1216.

[0248] 19, the uplink signal ULS_tx7 for the seventh transmitting electrode and the uplink signal ULS_tx8 for the eighth transmitting electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx7 for the seventh transmitting electrode may be supplied to the seventh transmitting electrode 1217, and the uplink signal ULS_tx8 for the eighth transmitting electrode may be supplied to the eighth transmitting electrode 1218.

[0249] 19, the uplink signal ULS_rx1 for the first receiving electrode and the uplink signal ULS_rx2 for the second receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1221, and the uplink signal ULS_rx2 for the second receiving electrode may be supplied to the second receiving electrode 1222.

[0250] 19, the uplink signal ULS_rx3 for the third receiving electrode and the uplink signal ULS_rx4 for the fourth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx3 for the third receiving electrode may be supplied to the third receiving electrode 1223, and the uplink signal ULS_rx4 for the fourth receiving electrode may be supplied to the fourth receiving electrode 1224.

[0251] 19, the uplink signal ULS_rx5 for the fifth receiving electrode and the uplink signal ULS_rx6 for the sixth receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx5 for the fifth receiving electrode may be supplied to the fifth receiving electrode 1225, and the uplink signal ULS_rx6 for the sixth receiving electrode may be supplied to the sixth receiving electrode 1226.

[0252] 19, the uplink signal ULS_rx7 for the seventh receiving electrode and the uplink signal ULS_rx8 for the eighth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx7 for the seventh receiving electrode may be supplied to the seventh receiving electrode 1227, and the uplink signal ULS_rx8 for the eighth receiving electrode may be supplied to the eighth receiving electrode 1228.

[0253] Referring to FIG. 20, the display device 100 can be driven by a local driving method.

[0254] 20, during an uplink signal transmission period, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to some of the transmitting touch electrodes Tx_TE, while during an uplink signal transmission period, a signal other than the uplink signal U may be supplied to the remaining transmitting touch electrodes Tx_TE and receiving touch electrodes Rx_TE.

[0255] 20, the uplink signal ULS_tx1 for the first transmitting electrode and the uplink signal ULS_tx2 for the second transmitting electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx1 for the first transmitting electrode may be supplied to the first transmitting electrode 1211, and the uplink signal ULS_tx2 for the second transmitting electrode may be supplied to the second transmitting electrode 1212.

[0256] 20, the uplink signal ULS_tx3 for the third transmitting electrode and the uplink signal ULS_tx4 for the fourth transmitting electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx3 for the third transmitting electrode may be supplied to the third transmitting electrode 1213, and the uplink signal ULS_tx4 for the fourth transmitting electrode may be supplied to the fourth transmitting electrode 1214.

[0257] Referring to FIG. 20, the display device 100 can be driven by the local driving method, thereby reducing power consumption.

[0258] Referring to FIG. 21, the display device 100 can be driven by a local driving method.

[0259] 21, during an uplink signal transmission period, a first waveform signal WF1 and a second waveform signal WF2 may be alternately supplied to some receiving touch electrodes Rx_TE, while during an uplink signal transmission period, a signal other than the uplink signal U may be supplied to the remaining receiving touch electrodes Rx_TE and transmitting touch electrodes Tx_TE.

[0260] 21, the uplink signal ULS_rx1 for the first receiving electrode and the uplink signal ULS_rx2 for the second receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1221, and the uplink signal ULS_rx2 for the second receiving electrode may be supplied to the second receiving electrode 1222.

[0261] 21, the uplink signal ULS_rx3 for the third receiving electrode and the uplink signal ULS_rx4 for the fourth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx3 for the third receiving electrode may be supplied to the third receiving electrode 1223, and the uplink signal ULS_rx4 for the fourth receiving electrode may be supplied to the fourth receiving electrode 1224.

[0262] Referring to FIG. 21, the display device 100 can be driven by the local driving method, thereby reducing power consumption.

[0263] Referring to FIG. 22, when switching from the nth frame Frame(n) to the n+1th frame Frame(n+1), the first waveform signal WF1 may be changed to the second waveform signal WF2, and the second waveform signal WF2 may be changed to the first waveform signal WF1.

[0264] During the uplink signal transmission period of the n-th frame Frame(n), the uplink signal U supplied to the touch panel TSP may be the same as the uplink signal U shown in FIG.

[0265] The (n+1)th frame Frame(n+1) may be the frame that follows the nth frame Frame(n).

[0266] During the uplink signal transmission period of the (n+1)th frame Frame(n+1), the first waveform signal WF1 of the uplink signal U of the nth frame Frame(n) may be changed to the second waveform signal WF2, and the second waveform signal WF2 of the uplink signal U of the nth frame Frame(n) may be changed to the first waveform signal WF1.

[0267] 22, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be supplied to the odd-numbered transmitting electrodes 1211, 1213, 1215, and 1217.

[0268] 22, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be supplied to the even-numbered transmitting electrodes 1212, 1214, 1216, and 1218.

[0269] 22, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be supplied to the odd-numbered receiving electrodes 1221, 1223, 1225, and 1227.

[0270] 22, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be supplied to the even-numbered receiving electrodes 1212, 1214, 1216, and 1218.

[0271] The local driving methods shown in Figures 15 to 18, 20, and 21 can also be applied to the uplink signal transmission period of the (n+1)th frame Frame(n+1). Also, the method shown in Figure 19 in which two first waveform signals WF1 and two second waveform signals WF2 are alternately driven can also be applied.

[0272] FIG. 23 is a diagram of a local drive according to an embodiment of the present disclosure.

[0273] In the case of the global driving method, an uplink signal may be supplied to the entire area of ​​the touch panel TSP, which may facilitate communication with the pen 20. On the other hand, in the case of the local driving method, an uplink signal may be supplied to a partial area of ​​the touch panel TSP, which may further reduce power consumption.

[0274] 23, the area of ​​the touch panel TSP can be divided into a first area A1 and a second area A2. When the touch panel TSP is driven in a local driving mode, an uplink signal may be supplied only to the first area A1.

[0275] 23, the second area A2 may be an area to which an uplink signal is not supplied. That is, since the second area A2 does not need to be supplied with an uplink signal, voltage control is not performed and the touch electrode in the second area A2 may be in a floating state. However, in terms of stability of voltage control, a ground voltage or a constant DC voltage may be supplied to the touch electrode. In addition, an AC signal that can be distinguished from the uplink signal may be supplied in some cases.

[0276] 23, the area of ​​the touch panel TSP is depicted as being divided into a first area A1 and a second area A2, but the manner in which the areas of the touch panel TSP are divided is not limited. For example, the touch panel TSP may include multiple areas to which uplink signals are supplied and multiple areas to which uplink signals are not supplied. Referring to FIG. 16, the first area A1 and the second area A2 are depicted as rectangles, but the manner in which the areas are divided is not limited.

[0277] 24 and 25 are diagrams relating to pen touch driving and finger touch driving that proceed during one frame period Frame according to an embodiment of the present disclosure.

[0278] 24, by supplying the alternating uplink signal U shown in FIGS. 12 to 22 to the touch electrode TE, it is possible to prevent an abnormal phenomenon in which the display driving is affected by the uplink signal U. Therefore, the display driving period and the uplink signal transmission period can be driven simultaneously. Even if the display driving period and the uplink signal transmission period are driven simultaneously, it is possible to prevent an abnormal phenomenon in which the display driving is affected by the uplink signal U.

[0279] 24, when the display driving period and the uplink signal transmission period are driven simultaneously, it is not necessary to match the period in which the uplink signal U is supplied with the blank period Tb. Therefore, the period in which the uplink signal U is supplied and the blank period Tb may be unrelated to each other.

[0280] To explain a specific period, it is assumed that the touch display device 10 is driven at 120 Hz, in which case one frame period (Frame) may be 8.3 ms.

[0281] In the case of time-division driving, if the period during which the uplink signal U is supplied is approximately 0.34 ms, the blank period Tb must be at least greater than 0.34 ms. Since the embodiment of the present disclosure allows simultaneous driving, the period during which the uplink signal U is supplied and the blank period Tb are independent of each other. Therefore, the blank period Tb can be relatively reduced. For example, if the period during which the uplink signal U is supplied is approximately 0.34 ms, the blank period Tb can be reduced to 0.08 ms. In this case, the active period Ta can be extended to 8.2 ms.

[0282] As described above, the embodiment of the present disclosure can prevent an abnormal phenomenon in which the display driving is affected by the uplink signal U even when the display and the uplink signal are driven simultaneously. However, in addition to simultaneous driving, time-division driving can also be applied to the display driving period and the uplink signal transmission period.

[0283] Referring to Figure 25, the period during which the uplink signal U is supplied may occur during a blank period Tb. In this case, the blank period Tb may be adjusted to match the period during which the uplink signal U is supplied. If the blank period Tb in Figure 24 is 0.08 ms, the blank period Tb in Figure 25 may be 0.34 ms. If the period during which the uplink signal U is supplied coincides with the blank period Tb, it is possible to reliably prevent an effect on the cathode electrode CE by time-division driving.

[0284] FIG. 26 is a flowchart illustrating a method for driving a touch display device according to an embodiment of the present disclosure.

[0285] The driving method for the touch display device may include an uplink signal output step S2601 and a downlink signal output step S2602.

[0286] The uplink signal output step S2601 may be a step of supplying an uplink signal to a touch panel on which a number of touch electrodes are arranged. The uplink signal may include a first uplink signal and a second uplink signal. The first uplink signal may be supplied to a first touch electrode, and the second uplink signal may be supplied to a second touch electrode. The first uplink signal may have a positive signal value, and the second uplink signal may have a negative signal value.

[0287] The step S2602 of outputting a downlink signal may be a step in which the pen, to which the uplink signal has been supplied, outputs a downlink signal corresponding to the uplink signal.

[0288] The above-described embodiment of the present disclosure can be briefly described as follows.

[0289] An embodiment of the present disclosure can provide a touch display device including a display panel on which a number of sub-pixels are arranged, a touch panel on which a number of touch electrodes are arranged, and a touch circuit for supplying uplink signals and touch driving signals to the touch panel, wherein the uplink signals include a first uplink signal and a second uplink signal, the first uplink signal being a first waveform signal is supplied to a first touch electrode, and the second uplink signal being a second waveform signal having a waveform different from that of the first waveform signal is supplied to a second touch electrode.

[0290] The second waveform signal may be inverted relative to the first waveform signal.

[0291] The second waveform signal may be an antiphase signal with respect to the first waveform signal.

[0292] The plurality of touch electrodes may include a plurality of transmitting electrodes and a plurality of receiving electrodes disposed across the plurality of transmitting electrodes.

[0293] The first touch electrode may be a first transmitting electrode, the second touch electrode may be a second transmitting electrode, and when a third uplink signal, which is the first waveform signal, is supplied to the first receiving electrode, a fourth uplink signal, which is the second waveform signal, may be supplied to the second receiving electrode.

[0294] The first touch electrode may be a first transmitting electrode, the second touch electrode may be a second transmitting electrode, and the plurality of receiving electrodes may be in a floating state or may be supplied with a DC voltage.

[0295] The third transmitting electrode and the fourth transmitting electrode may be in a floating state, or a DC voltage may be supplied to the third transmitting electrode and the fourth transmitting electrode.

[0296] The first touch electrode may be a first receiving electrode, the second touch electrode may be a second receiving electrode, and the plurality of transmitting electrodes may be in a floating state or may be supplied with a DC voltage.

[0297] The third receiving electrode and the fourth receiving electrode may be in a floating state, or a DC voltage may be supplied to the third receiving electrode and the fourth receiving electrode.

[0298] The second touch electrode may be disposed adjacent to the first touch electrode.

[0299] A third touch electrode and a fourth touch electrode may be arranged between the first touch electrode and the second touch electrode, and the third touch electrode arranged adjacent to the first touch electrode may be supplied with a third uplink signal which is the first waveform signal, and the fourth touch electrode arranged adjacent to the second touch electrode may be supplied with a fourth uplink signal which is the second waveform signal.

[0300] The first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode are transmitting electrodes, and a number of receiving electrodes arranged to intersect with the transmitting electrodes may be in a floating state or may be supplied with a DC voltage.

[0301] The first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode are receiving electrodes, and a number of transmitting electrodes arranged to intersect with the receiving electrodes may be in a floating state or may be supplied with a DC voltage.

[0302] A period during which the touch circuit is driven may include a first period and a second period, and during the first period, the first touch electrode may be supplied with the first uplink signal, which is the first waveform signal, and the second touch electrode may be supplied with the second uplink signal, which is the second waveform signal; and during a second period that follows the first period, the first touch electrode may be supplied with the first uplink signal, which is the second waveform signal, and the second touch electrode may be supplied with the second uplink signal, which is the first waveform signal.

[0303] The touch panel may include a first area and a second area, the touch circuit may provide the uplink signal to the first area, and the touch electrode in the second area may be in a floating state or may be supplied with a DC voltage.

[0304] The uplink signals may include beacon signals.

[0305] During a display active period of one frame, the touch circuit can provide the uplink signal to the touch panel.

[0306] The period during which the display panel is driven may include an active period during which the plurality of sub-pixels emit light and a blank period during which the sub-pixels are in a non-light-emitting state, and the uplink signal may be supplied to the touch panel during the blank period.

[0307] An embodiment of the present disclosure may provide a method for driving a touch display device, comprising: an uplink signal output step of supplying an uplink signal to a touch panel on which a plurality of touch electrodes are arranged; and a downlink signal output step of outputting a downlink signal corresponding to the uplink signal from a pen that has received the uplink signal, wherein the uplink signal includes a first uplink signal and a second uplink signal that is an inverted signal of the first uplink signal, and the first uplink signal is supplied to a first touch electrode and the second uplink signal is supplied to a second touch electrode.

[0308] The first touch electrode and the second touch electrode may extend in the same direction and be adjacent to each other.

[0309] The above description merely exemplifies the technical idea of ​​the present disclosure, and various modifications and variations are possible by a person having ordinary skill in the art to which the present disclosure pertains without departing from the essential characteristics of the present disclosure. Furthermore, the examples disclosed in the present disclosure are intended to illustrate, rather than limit, the technical idea of ​​the present disclosure, and the scope of the technical idea of ​​the present disclosure is not limited by such examples. [Explanation of symbols]

[0310] 100: Touch display device 100:Display device 110: Display panel 120: Data driving circuit 130: Gate drive circuit 140: Display controller

Claims

1. a display panel in which a large number of sub-pixels are arranged; A touch panel on which a large number of touch electrodes are arranged; and a touch circuit for providing an uplink signal and a touch drive signal to the touch panel; the uplink signals include a first uplink signal and a second uplink signal configured to be synchronized with each other; During an uplink signal transmission period in which the first uplink signal and the second uplink signal are transmitted synchronously, the first uplink signal, which is a first waveform signal, is supplied to a first touch electrode among the touch electrodes, and the second uplink signal, which is a second waveform signal having a waveform different from that of the first waveform signal, is supplied to a second touch electrode among the touch electrodes.

2. The touch display device of claim 1 , wherein the second waveform signal is an inverted signal of the first waveform signal.

3. The touch display device of claim 1 , wherein the second waveform signal is an inverse phase signal of the first waveform signal.

4. The touch display device according to claim 1 , wherein the plurality of touch electrodes comprises a plurality of transmitting electrodes and a plurality of receiving electrodes arranged to cross the plurality of transmitting electrodes.

5. the first touch electrode is a first transmission electrode, and the second touch electrode is a second transmission electrode; 5. The touch display device of claim 4, wherein when the third uplink signal, which is the first waveform signal, is supplied to a first receiving electrode among the receiving electrodes, the fourth uplink signal, which is the second waveform signal, is supplied to a second receiving electrode among the receiving electrodes.

6. the first touch electrode is a first transmission electrode, and the second touch electrode is a second transmission electrode; The touch display device according to claim 4 , wherein the plurality of receiving electrodes are in a floating state or are supplied with a DC voltage.

7. The touch display device of claim 4 , wherein the third and fourth transmission electrodes of the transmission electrodes are in a floating state or are supplied with a DC voltage.

8. the first touch electrode is a first receiving electrode, and the second touch electrode is a second receiving electrode; The touch display device of claim 4 , wherein the plurality of transmission electrodes are in a floating state or are supplied with a DC voltage.

9. The touch display device of claim 8 , wherein the third and fourth receiving electrodes of the receiving electrodes are in a floating state or a DC voltage is supplied to the third and fourth receiving electrodes.

10. The touch display device of claim 1 , wherein the second touch electrode is disposed adjacent to the first touch electrode.

11. a third touch electrode and a fourth touch electrode among the touch electrodes are disposed between the first touch electrode and the second touch electrode; a third uplink signal, which is the first waveform signal, is supplied to the third touch electrode disposed adjacent to the first touch electrode; The touch display device of claim 1 , wherein a fourth uplink signal, which is the second waveform signal, is supplied to the fourth touch electrode disposed adjacent to the second touch electrode.

12. the first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode are transmission electrodes; The touch display device of claim 11 , wherein a plurality of receiving electrodes arranged across the transmitting electrodes are in a floating state or are supplied with a DC voltage.

13. the first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode are receiving electrodes; The touch display device of claim 11 , wherein a plurality of transmission electrodes arranged across the reception electrodes are in a floating state or are supplied with a DC voltage.

14. the period during which the touch circuit is driven includes a first period and a second period; During the first period of time, the first touch electrode is supplied with the first uplink signal, which is the first waveform signal, and the second touch electrode is supplied with the second uplink signal, which is the second waveform signal; During a second period that follows the first period, The touch display device of claim 1 , wherein the first uplink signal, which is the second waveform signal, is supplied to the first touch electrode, and the second uplink signal, which is the first waveform signal, is supplied to the second touch electrode.

15. the touch panel includes a first area and a second area; the touch circuitry provides the uplink signal to the first region; The touch display device of claim 1 , wherein the touch electrodes in the second region are in a floating state or are supplied with a DC voltage.

16. The touch display device of claim 1 , wherein the uplink signal comprises a beacon signal.

17. The touch display device according to claim 1 , wherein the touch circuit supplies the uplink signal to the touch panel during a display active period of one frame.

18. a period during which the display panel is driven includes an active period during which the plurality of sub-pixels emit light and a blank period during which the sub-pixels are in a non-light-emitting state; The touch display device according to claim 1 , wherein the uplink signal is supplied to the touch panel during the blank period.

19. an uplink signal output step of supplying an uplink signal to a touch panel on which a plurality of touch electrodes are arranged; a downlink signal output step in which a pen receiving the uplink signal outputs a downlink signal corresponding to the uplink signal; the uplink signals include a first uplink signal and a second uplink signal that is an inverted signal of the first uplink signal, and the first uplink signal and the second uplink signal are configured to be synchronized with each other; a driving method for a touch display device, wherein during an uplink signal transmission period in which the first uplink signal and the second uplink signal are transmitted synchronously, the first uplink signal is supplied to a first touch electrode among the touch electrodes, and the second uplink signal is supplied to a second touch electrode among the touch electrodes.

20. The method of claim 19 , wherein the first touch electrode and the second touch electrode extend in the same direction and are adjacent to each other.

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