Touch display device and touch driving circuit

Abstract

The embodiment of the invention relates to a touch display device and a touch driving circuit. In a touch display device, a touch sensing mode period may include a first touch sensing mode period in which a first touch driving signal having a first amplitude is applied to a touch sensor, and a second touch sensing mode period in which a second touch driving signal having a second amplitude is applied to a touch sensor. A second touch drive signal having a second amplitude greater than the first amplitude is applied to the touch sensor. During a second touch sensing mode period, the touch driving circuit may provide a second touch driving signal to a portion of the touch sensors and provide an auxiliary driving signal to another portion of the touch sensors.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure relate to a touch display device and a touch driving circuit, and more specifically, for example but not limited to, relate to a touch display device and a touch driving circuit capable of supporting various touch sensing modes. Background Art

[0002] Recently, a touch display device has been developed that can detect touches of a user's finger or pen to provide a touch-based input processing function.

[0003] In order for these touch display devices to provide more diverse application functions, various forms of touch sensing are required. For example, wearable devices may require not only the function of sensing contact touches in the form of a user touching the screen, but also the function of sensing non-contact touches (e.g., hovering touches) in the form of a user not touching the screen. Summary of the Invention

[0004] Exemplary embodiments of the present disclosure may provide a touch display device and a touch driving circuit capable of supporting various touch sensing modes.

[0005] Exemplary embodiments of the present disclosure may provide a touch display device and a touch driving circuit capable of efficiently sensing contact touches and non-contact touches.

[0006] Exemplary embodiments of the present disclosure may provide a touch display device and a touch driving circuit capable of effectively and quickly sensing non-contact touches.

[0007] Exemplary embodiments of the present disclosure may provide a touch display device and a touch driving circuit capable of efficiently supporting a display mode, a contact touch sensing mode, and a hovering touch sensing mode.

[0008] Exemplary embodiments of the present disclosure may provide a touch display device and a touch driving circuit capable of preventing unwanted parasitic capacitance from occurring when sensing non-contact touches.

[0009] Exemplary embodiments of the present disclosure may provide a touch display device and a touch driving circuit capable of effectively driving non-sensing touch electrodes when sensing non-contact touches.

[0010] The objects according to the present disclosure are not limited to the above objects. Other objects and advantages not mentioned according to the present disclosure can be understood based on the following description, and can be more clearly understood based on the embodiments according to the present disclosure. In addition, it will be readily understood that the objects and advantages according to the present disclosure can be achieved by using the means or combinations thereof shown in the claims.

[0011] A touch display device according to an exemplary embodiment of the present disclosure may include: a touch sensor including a plurality of first touch electrodes and a plurality of second touch electrodes; and a touch driving circuit configured to provide a touch driving signal to the touch sensor during a touch sensing mode period.

[0012] The touch sensing mode period may include a first touch sensing mode period and a second touch sensing mode period. In the first touch sensing mode period, a first touch driving signal is applied to the touch sensor as the touch driving signal, and in the second touch sensing mode period, a second touch driving signal is applied to the touch sensor as the touch driving signal.

[0013] During the second touch sensing mode period, the touch driving circuit may provide the second touch driving signal to a part of the touch sensor and may provide an auxiliary driving signal to another part of the touch sensor.

[0014] The touch driving circuit may output an externally input external auxiliary driving signal as the auxiliary driving signal. In this case, the external auxiliary driving signal and the second touch driving signal may have the same phase.

[0015] The touch driving circuit may generate an internal auxiliary driving signal based on a reference driving signal input from the outside and output the internal auxiliary driving signal as the auxiliary driving signal. In this case, the internal auxiliary driving signal and the second touch driving signal may have the same phase.

[0016] During the first touch sensing mode period, the plurality of first touch electrodes may be electrically separated, and the plurality of second touch electrodes may be electrically separated.

[0017] During the second touch sensing mode period, two or more of the plurality of first touch electrodes may be electrically connected to each other, or two or more of the plurality of second touch electrodes may be electrically connected to each other.

[0018] The first touch sensing mode period may be a contact mode period for sensing a contact touch that has touched the screen, and the second touch sensing mode period may be a hover mode period for sensing a non-contact touch that has not touched the screen. The first touch driving signal may include a first pulse having a first amplitude during the first touch sensing mode period, and the second touch driving signal may include a second pulse having a second amplitude during the second touch sensing mode period. In this case, the second amplitude may be different from the first amplitude, or the number of second pulses may be different from the number of first pulses.

[0019] The second amplitude may be greater than the first amplitude, or the number of second pulses may be greater than the number of first pulses.

[0020] The second touch sensing mode period may include: a first sub-sensing period, in which the second touch driving signal is simultaneously applied to two or more first touch electrodes that are electrically connected to each other among the plurality of first touch electrodes; and a second sub-sensing period, in which the second touch driving signal is simultaneously applied to two or more second touch electrodes that are electrically connected to each other among the plurality of second touch electrodes.

[0021] During the first sub-sensing period, the touch driving circuit provides the auxiliary driving signal to the remaining first touch electrodes other than the two or more first touch electrodes and / or the plurality of second touch electrodes.

[0022] During the second sub-sensing period, the touch driving circuit provides the auxiliary driving signal to the remaining second touch electrodes other than the two or more second touch electrodes and / or the plurality of first touch electrodes.

[0023] The display mode period, the first touch sensing mode period, and the second touch sensing mode period may be defined by a first mode control signal and a second mode control signal having different signal waveforms.

[0024] The first mode control signal may include a first signal section having a first level voltage and a second signal section having a second level voltage different from the first level voltage.

[0025] The second mode control signal may include a third signal section having a third level voltage and a fourth signal section having a fourth level voltage different from the third level voltage.

[0026] During the display mode period, the first mode control signal has the second level voltage, and the second mode control signal has the third level voltage. During the first touch sensing mode period, the first mode control signal has the first level voltage, and the second mode control signal has the third level voltage. During the second touch sensing mode period, the first mode control signal has the first level voltage, and the second mode control signal has the fourth level voltage.

[0027] A touch driving circuit according to an exemplary embodiment of the present disclosure may include: a first touch driving signal output unit configured to provide a first touch driving signal to each of a plurality of first touch electrodes during a first touch sensing mode period; a sensing unit configured to provide a second touch driving signal to two or more of the plurality of touch electrodes during a second touch sensing mode period; and an auxiliary driving signal output unit configured to provide an auxiliary driving signal to two or more of the plurality of touch electrodes that are not applied with the second touch driving signal during the second touch sensing mode period.

[0028] The touch driving circuit according to an exemplary embodiment of the present disclosure may further include a bonding circuit for controlling electrical connections between the plurality of first touch electrodes and electrical connections between the plurality of second touch electrodes.

[0029] During the first touch sensing mode period, the bonding circuit electrically separates two or more of the first touch electrodes and electrically separates two or more of the second touch electrodes.

[0030] A touch display device according to an exemplary embodiment of the present disclosure may include a touch sensor and a touch driving circuit, the touch sensor including a plurality of first touch electrodes and a plurality of second touch electrodes, the touch driving circuit being configured to provide a touch driving signal to the touch sensor during a touch sensing mode period.

[0031] The touch sensing mode period may include: a first touch sensing mode period in which a first touch driving signal having a first amplitude is applied to the touch sensor as the touch driving signal, and a second touch sensing mode period in which a second touch driving signal having a second amplitude greater than the first amplitude is applied to the touch sensor as the touch driving signal.

[0032] During the second touch sensing mode period, the touch driving circuit may provide the second touch driving signal to a part of the touch sensor and may provide an auxiliary driving signal to another part of the touch sensor.

[0033] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of supporting various touch sensing modes can be provided.

[0034] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of efficiently sensing contact touch and non-contact touch can be provided.

[0035] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of effectively and quickly sensing non-contact touch can be provided.

[0036] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of efficiently supporting a display mode, a contact touch sensing mode, and a hover touch sensing mode can be provided.

[0037] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of preventing unwanted parasitic capacitance from occurring when sensing non-contact touch can be provided.

[0038] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of efficiently driving a non-sensing touch electrode (e.g., auxiliary driving) when sensing non-contact touch can be provided.

[0039] According to an exemplary embodiment of the present disclosure, display driving, contact touch sensing, and hover touch sensing can be efficiently performed in terms of driving time, thereby achieving low-power driving.

[0040] It should be understood that the above general description and the following detailed description of the present disclosure are both exemplary and explanatory, and are intended to provide further explanation of the claimed present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings are included to provide a further understanding of the present disclosure and are incorporated into and constitute a part of the present disclosure, which illustrate embodiments of the present disclosure and, together with the description, are used to explain the principles of the present disclosure. In the drawings:

[0042] Figure 1 is a system configuration diagram of a touch display device according to an exemplary embodiment of the present disclosure.

[0043] Figure 2 shows a touch sensor of a touch display device according to an exemplary embodiment of the present disclosure.

[0044] Figure 3 shows a touch sensing system of a touch display device according to an exemplary embodiment of the present disclosure.

[0045] Figure 4 shows a driving timing diagram of a touch display device according to an exemplary embodiment of the present disclosure.

[0046] Figure 5 shows an operation mode definition table of a touch display device according to an exemplary embodiment of the present disclosure.

[0047] Figure 6Shows a touch driving circuit according to an exemplary embodiment of the present disclosure.

[0048] Figure 7 Shows a charge amplifier in a touch driving circuit according to an exemplary embodiment of the present disclosure.

[0049] Figure 8 Is a flowchart of an operation method of a touch display device according to an exemplary embodiment of the present disclosure.

[0050] Figure 9A And Figure 9B Is a diagram showing a driving situation when an operation period of a touch display device according to an exemplary embodiment of the present disclosure is a first touch sensing mode period.

[0051] Figure 10A And Figure 10B Is a diagram showing a driving situation when an operation period of a touch display device according to an exemplary embodiment of the present disclosure is a first sub-sensing period during a second touch sensing mode period.

[0052] Figure 11A And Figure 11B Is a diagram showing a driving situation when an operation period of a touch display device according to an exemplary embodiment of the present disclosure is a second sub-sensing period during a second touch sensing mode period.

[0053] Figure 12 Shows, as an example, a bonding group for a touch sensor according to an exemplary embodiment of the present disclosure.

[0054] Figure 13 And Figure 14 Shows, as an example, touch driving and auxiliary driving of a bonding group for a touch sensor according to an exemplary embodiment of the present disclosure.

[0055] Figure 15 Shows a touch sensing system having an auxiliary driving function according to an exemplary embodiment of the present disclosure.

[0056] Figures 16 to 18 Shows a driving timing diagram of a touch display device according to an exemplary embodiment of the present disclosure.

[0057] Figures 19 to 21 Shows a signal output structure of a touch driving circuit according to an exemplary embodiment of the present disclosure.

[0058] Figures 22 to 27 Shows an example of a driving operation of a touch display device according to an exemplary embodiment of the present disclosure. Detailed Description

[0059] Reference will now be made in detail to embodiments of the present disclosure, examples of which may be shown in the accompanying drawings. The progress of the described processing steps and / or operations is an example; however, the order of the steps and / or operations is not limited to the order set forth herein and may be changed as is known in the art, except for steps and / or operations that must occur in a particular order. The names of the corresponding elements used in the following description may be selected only for the convenience of writing the specification and may thus be different from the names used in actual products.

[0060] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When assigning reference numerals to the components of each drawing, the same reference numerals may also be assigned to the same components even when they are shown in different drawings. Details of known technologies or functions may be skipped when it is determined that they make the subject matter of the present disclosure unclear. As used herein, when a component "comprises", "has", or "is made of", "formed of", or "composed of" another component, other components may be added to the component, unless the component "only" comprises, has, or is made of, formed of, or composed of another component. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0061] Such labels as "first", "second", "A", "B", "(a)", and "(b)" may be used to describe the components of the present disclosure. These labels are provided only to distinguish one component from another, and the nature, order, or number of the components is not limited by the labels.

[0062] When describing the positional relationship between components, when two or more components are described as "connected", "coupled", or "linked", the two or more components may be directly "connected", "coupled", or "linked", or another component may intervene. Here, the other component may be included in one or more of the two or more components that are "connected", "coupled", or "linked" to each other.

[0063] When terms such as "after", "next", "then", and "before" are used to describe the temporal flow relationship related to components, operation methods, and manufacturing methods, unless the terms "immediately" or "directly" are used, it may include a non - continuous relationship.

[0064] When a component is assigned a value or its corresponding information (e.g., level), the value or the corresponding information may be interpreted as including tolerances that may arise due to various factors (e.g., process factors, internal or external influences, or noise).

[0065] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments belong. It will also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless explicitly so defined herein. For example, the term "component" or "unit" can be applied, for example, to an individual circuit or structure, an integrated circuit, a computational block of a circuit device, or any structure configured to perform the described function, as would be understood by one of ordinary skill in the art.

[0066] The features of the various embodiments of the present disclosure can be combined in part or in whole with each other, and can be technically related or interoperable. The embodiments can be implemented independently of each other or can be implemented together in an associated relationship.

[0067] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0068] Figure 1 FIG. 100 is a system configuration diagram of a touch display device 100 according to an exemplary embodiment of the present disclosure.

[0069] Referring to Figure 1 , the touch display device 100 may include a touch display panel 110 and a display driving circuit as components for displaying an image.

[0070] The display driving circuit may be a circuit for driving display driving components included in the touch display panel 110 to display an image on the touch display panel 110, and may include a data driving circuit 120, a gate driving circuit 130, and a display controller 140.

[0071] The touch display panel 110 may include a display area DA for displaying an image, and may also include a non-display area NDA that does not display an image. Here, the non-display area may also be referred to as a border area. The non-display area may also be referred to as an edge area or a border area. All or part of the non-display area NDA may be an area visible from the front of the touch display device 100, or may be a curved area that is not visible from the front of the touch display device 100.

[0072] The touch display panel 110 may include a plurality of sub-pixels SP, and various types of signal lines for driving the plurality of sub-pixels SP.

[0073] The various types of signal lines may include a plurality of data lines for transmitting data signals (also referred to as data voltages or image signals) and a plurality of gate lines for transmitting gate signals (also referred to as scan signals).

[0074] A plurality of data lines DL and a plurality of gate lines GL may cross each other. Each of the plurality of gate lines GL may be configured to extend in a first direction. Each of the plurality of data lines DL may be configured to extend in a second direction different from the first direction. Here, the first direction may be a row direction, and the second direction may be a column direction. Alternatively, the first direction may be a column direction, and the second direction may be a row direction.

[0075] The data driving circuit 120 may be a circuit for driving the data lines and may output data signals to the plurality of data lines DL. The gate driving circuit 130 may be a circuit for driving the gate lines and may output gate signals to the plurality of gate lines GL.

[0076] The display controller 140 may receive input data FDATA and a display driving control signal DDCS from the host system 180. For example, the display driving control signal DDCS may include a vertical synchronization signal VSYNC, a horizontal synchronization signal HSYNC, and a data enable signal DE.

[0077] The display controller 140 may supply image data DATA to the data driving circuit 120 based on the input data FDATA to control the data driving circuit 120. In addition, the display controller 140 may be a device for controlling the data driving circuit 120 and the gate driving circuit 130, and may control the driving timings of the plurality of data lines DL and the plurality of gate lines GL. The display controller 140 may provide a data driving control signal DCS to the data driving circuit 120 to control the data driving circuit 120, and may provide a gate driving control signal GCS to the gate driving circuit 130 to control the gate driving circuit 130.

[0078] The data driving circuit 120 may control the supply of data signals to the plurality of data lines DL according to the driving timing of the display controller 140. The data driving circuit 120 may receive image data DATA in digital form from the display controller 140, convert the received image data DATA into an analog data signal, and output the converted analog data signal to the plurality of data lines DL.

[0079] The gate driving circuit 130 may control the supply of gate signals to the plurality of gate lines GL according to the timing of the display controller 140. The gate driving circuit 130 may receive a first gate voltage corresponding to a conductive level voltage, a second gate voltage corresponding to a cut-off level voltage, and various gate driving control signals GCS, generate a gate signal, and provide the generated gate signal to the plurality of gate lines GL. For example, the first gate voltage may be a voltage higher than the second gate voltage. Alternatively, the second gate voltage may be a voltage higher than the first gate voltage.

[0080] For example, the data driving circuit 120 may be connected to the touch display panel 110 by a tape automated bonding (TAB) method, or may be connected to a conductive pad such as a bonding pad of the touch display panel 110 by a chip on glass (COG) or a chip on panel (COP) method, or may be connected to the touch display panel 110 by a chip on film (COF) method, but is not limited thereto. Hereinafter, for convenience of explanation, it is assumed that the data driving circuit 120 is connected to the touch display panel 110 as a chip on film (COF) type.

[0081] The gate driving circuit 130 may be connected to the touch display panel 110 by a tape automated bonding (TAB) method, or may be connected to a conductive pad such as a bonding pad of the touch display panel 110 by a chip on glass (COG) or a chip on panel (COP) method, or may be connected to the display panel 110 according to the chip on film (COF) method. Alternatively, the gate driving circuit 130 may be an in-panel gate (GIP) type and may be formed in the non-display area NDA of the touch display panel 110, but is not limited thereto. Alternatively, the gate driving circuit 130 may be disposed in the display area DA of the touch display panel 110. The gate driving circuit 130 may be disposed on or connected to the substrate. That is, in an example where the gate driving circuit 130 is implemented by GIP technology, the gate driving circuit 130 may be disposed in the non-display area NDA of the substrate. If the gate driving circuit 130 is a chip on glass (COG) type, a chip on film (COF) type, etc., the gate driving circuit 130 may be connected to the substrate.

[0082] In addition, at least one of the data driving circuit 120 and the gate driving circuit 130 may be disposed in the display area DA. For example, the gate driving circuit 130 may be disposed in the display area DA. In this case, the gate driving circuit 130 may be disposed so as not to overlap with the sub-pixel SP, or may be disposed so as to overlap with the sub-pixel SP partially or entirely.

[0083] According to the driving method, the panel design method, or the panel shape, the data driving circuit 120 may be connected to, but is not limited to, one side (e.g., the upper edge or the lower edge) of the display panel 110, may be connected to one side and the other side (e.g., the upper edge and the lower edge) of the display panel 110, or may be connected along one side (e.g., the upper edge, the lower edge, the left edge, and the right edge) of the display panel 110.

[0084] Depending on the driving method, panel design method, or panel shape, the gate driving circuit 130 may be connected to, but is not limited to, one side (e.g., the upper edge or the lower edge) of the display panel 110, may be connected to both one side and the other side (e.g., the upper edge and the lower edge) of the display panel 110, or may be connected along one side (e.g., the upper edge, the lower edge, the left edge, and the right edge) of the display panel 110.

[0085] The display controller 140 may be implemented as a component separate from the data driving circuit 120, or may be implemented as an integrated circuit integrated with the data driving circuit 120.

[0086] The display controller 140 may be a timing controller used in typical display technologies, or may be a control device capable of further performing other control functions including a timing controller, or may be a control device different from a timing controller, or may be a circuit within a control device. The display controller 140 may be implemented using various circuits or electronic components, such as an integrated circuit (IC), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a processor, etc., but is not limited thereto.

[0087] The display controller 140 may be mounted on a printed circuit board, a flexible printed circuit, etc., and may be electrically connected to the data driving circuit 120, the gate driving circuit 130, etc. through a printed circuit board, a flexible printed circuit, etc., but is not limited thereto.

[0088] The display controller 140 may transmit and receive signals to and from the data driving circuit 120 according to one or more predetermined interfaces. For example, the interface may include a low voltage differential signaling (LVDS) interface, an embedded clock point-to-point interface (EPI) interface, or a serial peripheral interface (SPI), etc. Similarly, the display controller 140 may transmit signals to and receive signals from the gate driving circuit 130 via one or more predetermined interfaces.

[0089] The touch display device 100 may be a liquid crystal display device (LCD), a plasma display device (PDP), a field emission display device (FED), etc., or may be a self-luminous display device in which the display panel 110 emits light itself (e.g., an organic light emitting display device, an inorganic light emitting display device, etc.). That is, the display panel 110 may be a liquid crystal display panel or a self-luminous display panel. In an example where the touch display device 100 is a self-luminous display device, each of the plurality of sub-pixels SP may include a light emitting element.

[0090] In addition, in order to provide a touch sensing function in addition to an image display function, the touch display device 100 according to an embodiment of the present disclosure may include a touch sensor and a touch sensing circuit 150.

[0091] The touch sensing circuit 150 can detect whether a touch object such as a finger or a pen has touched by sensing the touch sensor, or detect the touch position (or touch coordinates).

[0092] The touch sensing circuit 150 may include a touch driving circuit 160, a touch controller 170, and one or more other components. The touch driving circuit 160 is configured to drive and sense the touch sensor to generate touch sensing data, and the touch controller 170 is capable of using the touch sensing data to detect the occurrence of a touch or the touch position (or touch coordinates).

[0093] The touch sensor may include, but is not limited to, a plurality of touch electrodes. The plurality of touch electrodes may be electrically connected to the touch driving circuit 160 through a plurality of touch lines. Refer to Figure 2 for a more detailed description of the touch sensor.

[0094] The touch driving circuit 160 and the touch controller 170 included in the touch sensing circuit 150 may be implemented as separate devices or as one device. In addition, the touch driving circuit 160 and the data driving circuit 120 may be implemented as separate devices or as one device.

[0095] For example, the touch driving circuit 160 may be implemented as a readout integrated circuit (ROIC). Alternatively, the touch driving circuit 160 and the data driving circuit 120 may be integrated and implemented as a source and readout integrated circuit (SRIC). The touch controller 170 may be implemented as a micro control unit (MCU).

[0096] The touch display device 100 may further include a power supply circuit that supplies various types of power to the display driving circuit and / or the touch sensing circuit.

[0097] The touch display device 100 according to an embodiment of the present disclosure may be a mobile terminal such as a laptop computer, a smart phone, or a tablet computer, or may be a monitor or a television (TV) of various sizes, and is not limited thereto, and may be various types and sizes of displays capable of displaying information or images.

[0098] Alternatively, the touch display device 100 according to an exemplary embodiment of the present disclosure may be a wearable device wearable on the body, such as a smart watch.

[0099] Figure 2 The touch sensor TS of the touch display device 100 according to an exemplary embodiment of the present disclosure is shown.

[0100] Refer to Figure 2 . The touch driving circuit 160 may sense the touch sensor TS, generate touch sensing data as a sensing result, and provide the touch sensing data to the touch controller 170.

[0101] Reference Figure 2 As shown, the touch sensor TS may include a plurality of touch electrodes TE. The plurality of touch electrodes TE may be electrically connected to the touch driving circuit 160 through a plurality of touch lines TL.

[0102] Reference Figure 2 As shown, the plurality of touch electrodes TE may include a plurality of first touch electrodes TE1 and a plurality of second touch electrodes TE2. For example, the plurality of first touch electrodes TE1 and the plurality of second touch electrodes TE2 may cross each other. Each of the plurality of first touch electrodes TE1 may extend in a first direction, and each of the plurality of second touch electrodes TE2 may extend in a second direction. Accordingly, a part of each of the plurality of first touch electrodes TE1 may overlap with the plurality of second touch electrodes TE2.

[0103] Reference Figure 2 As shown, the plurality of first touch electrodes TE1 may be electrically connected to the touch driving circuit 160 through a plurality of first touch lines TL1, and the plurality of second touch electrodes TE2 may be electrically connected to the touch driving circuit 160 through a plurality of second touch lines TL2.

[0104] The touch sensor TS may be implemented as a touch panel and may exist separately outside the display panel 110 or may exist inside the display panel 110.

[0105] The external touch sensor TS existing outside the display panel 110 may be manufactured separately from the display panel 110 and then combined with the display panel 110 during the assembly process. The external touch sensor TS may be implemented as a touch panel including a substrate and a plurality of touch electrodes TE on the substrate.

[0106] The internal or built-in touch sensor TS existing in the display panel 110 may be formed together with the electrodes and lines related to display driving during the manufacturing process of the display panel 110. Hereinafter, for ease of explanation, it is assumed that the touch sensor TS is a built-in touch sensor or an internal touch sensor TS existing inside the display panel 110.

[0107] The touch driving circuit 160 may provide a touch driving signal to at least one of the plurality of touch electrodes TE included in the touch sensor TS and may sense at least one of the plurality of touch electrodes to generate touch sensing data. Here, the touch driving signal may be a signal with a changing voltage level.

[0108] The touch sensing circuit 150 may perform touch sensing. For example, the touch sensing circuit 150 may sense a touch using a mutual capacitance sensing method or a self-capacitance sensing method.

[0109] When the touch sensing circuit 150 performs touch sensing by using the mutual capacitance sensing method, the touch sensing circuit 150 may perform touch sensing based on the capacitance (e.g., mutual capacitance) between the first touch electrode TE1 and the second touch electrode TE2.

[0110] According to the mutual capacitance sensing method, a plurality of touch electrodes TE may be divided into driving touch electrodes (also referred to as transmitting touch electrodes) and sensing touch electrodes (also referred to as receiving touch electrodes). The touch driving circuit 160 may drive the driving touch electrodes and sense the sensing touch electrodes. Hereinafter, the mutual capacitance sensing may also be described as "mutual sensing".

[0111] According to the mutual capacitance sensing technology, a plurality of touch electrodes may be divided into driving touch electrodes and sensing touch electrodes. The touch driving circuit 160 may drive the driving touch electrodes and sense the sensing touch electrodes. For example, in mutual sensing, a plurality of first touch electrodes TE1 may be driving touch electrodes (e.g., transmitting touch electrodes), and a plurality of second touch electrodes TE2 may be sensing touch electrodes (e.g., receiving touch electrodes). Another example is that in mutual sensing, a plurality of first touch electrodes TE1 may be sensing touch electrodes (e.g., receiving touch electrodes), and a plurality of second touch electrodes TE2 may be driving touch electrodes (e.g., transmitting touch electrodes). Hereinafter, for the sake of convenience in explanation, the case where a plurality of first touch electrodes TE1 are driving touch electrodes (e.g., transmitting touch electrodes) and a plurality of second touch electrodes TE2 are sensing touch electrodes (e.g., receiving touch electrodes) is illustrated.

[0112] When the touch sensing circuit 150 performs touch sensing by using the self-capacitance sensing method, the touch sensing circuit 150 may perform touch sensing based on the capacitance between each touch electrode TE and a touch object (e.g., a finger, a pen, etc.).

[0113] According to the self-capacitance sensing method, each of the plurality of touch electrodes TE may be used as a driving touch electrode and a sensing touch electrode. The touch driving circuit 160 may drive all or part of the plurality of touch electrodes TE and sense all or part of the plurality of touch electrodes TE. Hereinafter, the self-capacitance sensing may also be referred to as "self-sensing".

[0114] For example, in self-sensing, the touch driving circuit 160 can provide a touch driving signal to at least one of the plurality of first touch electrodes TE1 and sense at least one of the first touch electrodes TE1 to which the touch driving signal is provided. The touch driving circuit 160 can provide a touch driving signal to at least one of the plurality of second touch electrodes TE2 and sense at least one of the second touch electrodes TE2 to which the touch driving signal is provided. That is, in self-sensing, each of the plurality of touch electrodes TE including the plurality of first touch electrodes TE1 and the plurality of second touch electrodes TE2 can perform two roles (i.e., the role of driving the touch electrode and the role of sensing the touch electrode).

[0115] Reference Figure 2 , a first touch line TL1 can be connected to each of the plurality of first touch electrodes TE1. Alternatively, two first touch lines TL1 can be connected to each of the plurality of first touch electrodes TE1. In this case, the first touch line TL1 can be connected to each of one end and the other end of a first touch electrode TE1.

[0116] A second touch line TL2 can be connected to each of the plurality of second touch electrodes TE2. Alternatively, two second touch lines TL2 can be connected to each of the plurality of second touch electrodes TE2. In this case, the second touch line TL2 can be connected to each of one end and the other end of a second touch electrode TE2.

[0117] As an example, each of the plurality of first touch electrodes TE1 and the plurality of second touch electrodes TE2 can have a bar shape.

[0118] As another example, each of the plurality of first touch electrodes TE1 and the plurality of second touch electrodes TE2 can be configured as a plurality of sub-electrodes electrically connected to each other through a bridge electrode.

[0119] As another example, each of the plurality of first touch electrodes TE1 can be integrally formed, and each of the plurality of second touch electrodes TE2 can be formed of a plurality of sub-electrodes electrically connected to each other through a bridge electrode.

[0120] As another example, each of the plurality of second touch electrodes TE2 can be integrally formed, and each of the plurality of first touch electrodes TE1 can be formed of a plurality of sub-electrodes electrically connected to each other through a bridge electrode.

[0121] As an example, the plurality of first touch electrodes TE1 can be provided in a first sensor metal layer, and the plurality of second touch electrodes TE2 can be provided in a second sensor metal layer. Here, a sensor interlayer insulating film can be provided between the first sensor metal layer and the second sensor metal layer.

[0122] In another example, if each of the plurality of first touch electrodes TE1 is integrally formed and each of the plurality of second touch electrodes TE2 is formed of a plurality of sub - electrodes electrically connected to each other through bridge electrodes, the plurality of first touch electrodes TE1 and the plurality of sub - electrodes may be disposed within a sensor metal layer, and the bridge electrodes electrically connecting the plurality of sub - electrodes may be disposed within a bridge metal layer. Here, a sensor interlayer insulating film may be disposed between the sensor metal layer and the bridge metal layer.

[0123] In another example, if each of the plurality of second touch electrodes TE2 is integrally formed and each of the plurality of first touch electrodes TE1 is formed of a plurality of sub - electrodes electrically connected to each other through bridge electrodes, the plurality of second touch electrodes TE2 and the plurality of sub - electrodes may be disposed within a sensor metal layer, and the bridge electrodes electrically connecting the plurality of sub - electrodes may be disposed within a bridge metal layer. Here, a sensor interlayer insulating film may be arranged between the sensor metal layer and the bridge metal layer.

[0124] Figure 3 A touch sensing system of a touch display device 100 according to an exemplary embodiment of the present disclosure is shown.

[0125] The touch display device 100 according to an embodiment of the present disclosure may include a touch sensor TS, a touch driving circuit 160, a touch controller 170, and a display controller 140.

[0126] The touch sensor TS may include a plurality of touch electrodes. The touch sensor TS may further include a plurality of touch lines for electrically connecting the plurality of touch electrodes to the touch driving circuit 160.

[0127] The touch driving circuit 160 may drive the touch sensor TS by providing a touch driving signal TDS to the touch sensor TS, and may sense the touch sensor TS. The touch driving circuit 160 that senses the touch sensor TS may mean sensing the capacitance between the touch electrodes TE or sensing the capacitance of the touch electrodes TE.

[0128] The touch controller 170 may provide a reference touch driving signal TDS_REF to the touch driving circuit 160. The reference touch driving signal TDS_REF may be a signal whose voltage level changes or fluctuates. The reference touch driving signal TDS_REF may be a signal having a reference amplitude ΔV0. For example, the reference touch driving signal TDS_REF may be a square wave, a sine wave, a triangular wave, etc. For example, the reference touch driving signal TDS_REF may be a pulse width modulation (PWM) signal.

[0129] The touch driving circuit 160 may generate a touch driving signal TDS to be provided to the touch sensor TS using a reference touch driving signal TDS_REF.

[0130] The touch driving signal TDS may be one of a first touch driving signal TDS1 applied to the touch sensor TS during a first period (e.g., a first touch sensing mode period) and a second touch driving signal TDS2 applied to the touch sensor TS during a second period (e.g., a second touch sensing mode period).

[0131] The first touch driving signal TDS1 and the second touch driving signal TDS2 may be signals having variable voltage levels. The first touch driving signal TDS1 may be a signal including a first pulse having a first amplitude ΔV1, and the second touch driving signal TDS2 may be a signal including a second pulse having a second amplitude ΔV2.

[0132] The second amplitude ΔV2 may be different from the first amplitude ΔV1, or the number of second pulses may be different from the number of first pulses. For example, the second amplitude ΔV2 may be greater than the first amplitude ΔV1, or the number of second pulses may be greater than the number of first pulses. Hereinafter, for ease of explanation, a case where the second amplitude ΔV2 is greater than the first amplitude ΔV1 is illustrated. However, the present disclosure is not limited thereto.

[0133] For example, the first touch driving signal TDS1 and the second touch driving signal TDS2 may be square waves, sine waves, or triangular waves. For example, the first touch driving signal TDS1 and the second touch driving signal TDS2 may be pulse width modulation signals. The frequencies of the first touch driving signal TDS1 and the second touch driving signal TDS2 may be the same as the frequency of the reference touch driving signal TDS_REF.

[0134] The touch controller 170 may control the touch driving circuit 160. To this end, the touch controller 170 may generate a second mode control signal MCS2 based on a first mode control signal MCS1 received from the display controller 140 and provide the second mode control signal MCS2 to the touch driving circuit 160, thereby controlling the operation timing of the touch driving circuit 160. Here, the second mode control signal MCS2 may also be referred to as a “touch mode control signal”. The touch driving circuit 160 and the touch controller 170 may be implemented as separate devices or a single device, but are not limited thereto.

[0135] The operation timing and operation type of the touch driving circuit 160 according to an embodiment of the present disclosure may be defined by a first mode control signal MCS1 and a second mode control signal MCS2. In addition, the operation timing and operation type of the touch display device 100 according to an embodiment of the present disclosure may be defined by a combination of the first mode control signal MCS1 and the second mode control signal MCS2.

[0136] The touch driving circuit 160 and the touch controller 170 according to the above-described embodiment of the present disclosure will be described again below.

[0137] The touch driving circuit 160 according to an embodiment of the present disclosure may include: a first signal input unit 310 configured to receive a reference touch driving signal and a touch mode control signal; and a first signal output unit 320 configured to output a first touch driving signal TDS1 having a first amplitude ΔV1 or a second touch driving signal TDS2 having a second amplitude ΔV2 different from the first amplitude ΔV1 to the touch sensor TS based on the reference touch driving signal TDS_REF and the second mode control signal MCS2.

[0138] The first signal output unit 320 may output the first touch driving signal TDS1 or the second touch driving signal TDI2 to the touch electrode TE according to the level voltage of the second mode control signal MCS2.

[0139] If the second mode control signal MCS2 has a first level voltage, the first signal output unit 320 may output the first touch driving signal TDS1 to A touch electrodes TE. A is a natural number greater than or equal to 1.

[0140] If the second mode control signal MCS2 has a second level voltage, the first signal output unit 320 may output the second touch driving signal TDS2 to B touch electrodes TE. Here, B may be a value greater than A.

[0141] According to the above, the second mode control signal MCS2 may have a first level voltage or a second level voltage. If the second mode control signal MCS2 has a first level voltage, the first touch driving signal TDS1 may be applied to A touch electrodes TE at one time point. If the second mode control signal MCS2 has a second level voltage, the second touch driving signal TDS2 may be applied to B touch electrodes TE greater than A at one time point.

[0142] The touch controller 170 according to an embodiment of the present disclosure may be a control device for controlling the touch sensing operation of the touch display device 100, and may include a second signal input unit 330 and a second signal output unit 340. The touch controller 170 according to an embodiment of the present disclosure may be configured to receive a first mode control signal MCS1, and output a reference touch drive signal TDS_REF and a second mode control signal MCS2.

[0143] The second signal input unit 330 may be configured to receive the first mode control signal MCS1 from the display controller 140.

[0144] The second signal output unit 340 may be configured to output the reference touch drive signal TDS_REF, and may be configured to output the second mode control signal MCS2 generated based on the first mode control signal MCS1.

[0145] The first mode control signal MCS1 may include a first signal section having a first level voltage and a second signal section having a second level voltage different from the first level voltage.

[0146] If the first mode control signal MCS1 is the second signal section having the second level voltage, the second mode control signal MCS2 may have a third level voltage.

[0147] If the first mode control signal MCS1 is the first signal section having the first level voltage, the second mode control signal MCS2 may include a signal section having the third level voltage and a signal section having a fourth level voltage different from the third level voltage.

[0148] Figure 4 A driving timing diagram of the touch display device 100 according to an exemplary embodiment of the present disclosure is shown, and Figure 5 An operation mode definition table of the touch display device 100 according to an exemplary embodiment of the present disclosure is shown.

[0149] Reference Figure 4 and Figure 5 , the touch display device 100 according to an exemplary embodiment of the present disclosure may have various operation modes. The various operation modes may include a display mode for displaying an image and a touch sensing mode for sensing a touch.

[0150] The touch sensing mode may include a first touch sensing mode and a second touch sensing mode. The first touch sensing mode may be a contact touch sensing mode for sensing "contact touch", where "contact touch" is a touch that touches the screen, and the second touch sensing mode may be a hover touch sensing mode for sensing "hover touch", where "hover touch" is a touch within a predetermined distance from the screen without touching the screen. Hereinafter, the contact touch sensing mode may be abbreviated as the contact mode, and the hover touch sensing mode may be abbreviated as the hover mode.

[0151] In an embodiment of the present disclosure, "hover touch" may also be referred to as "non-contact touch". In an embodiment of the present disclosure, hover touch may refer to an action where a user's body or pen points to a specific point (or position) on the screen without the user touching the screen, or a gesture such as a movement like a gesture or the movement of the user's body or pen on the screen.

[0152] In an embodiment of the present disclosure, sensing hover touch may mean detecting the position of a body or pen that does not touch the screen (i.e., a non-contact state), or detecting the movement of a body or pen that does not touch the screen (i.e., a non-contact state).

[0153] Reference Figure 4 and Figure 5 , the operation period of the touch display device 100 may include a display mode period Td for displaying an image and a touch sensing mode period Tt, and the touch sensing mode period Tt may include a first touch sensing mode period Tt1 and a second touch sensing mode period Tt2. The first touch sensing mode period Tt1 is a contact mode period for sensing contact touch that has touched the screen, and the second touch sensing mode period Tt2 is a hover mode period for sensing non-contact touch that has not touched the screen.

[0154] Reference Figure 4 and Figure 5 , the display mode period Td may be a period during which the touch display device 100 operates in the display mode, and the touch sensing mode period Tt may be a period during which the touch display device 100 operates in the touch sensing mode.

[0155] Reference Figure 4 and Figure 5 , the first touch sensing mode period Tt1 may be a period during which the touch display device 100 operates in the first touch sensing mode (e.g., the contact mode), and the second touch sensing mode period Tt2 may be a period during which the touch display device 100 operates in the second touch sensing mode (e.g., the hover mode).

[0156] During the touch sensing mode period Tt, the touch driving circuit 160 may provide a touch driving signal TDS to the touch sensor TS.

[0157] During the first touch sensing mode period Tt1, the touch driving circuit 160 may provide a first touch driving signal TDS1 to the touch sensor TS. Here, the first touch driving signal TDS1 may be a signal whose voltage level changes over time and has a first frequency and a first amplitude ΔV1.

[0158] During the second touch sensing mode period Tt2, the touch driving circuit 160 may provide a second touch driving signal TDS2 to the touch sensor TS. Here, the second touch driving signal TDS2 may be a signal whose voltage level changes over time and has a second frequency and a second amplitude ΔV2. The second frequency may be the same as or different from the first frequency. The second amplitude ΔV2 may be different from the first amplitude ΔV1.

[0159] If the second touch sensing mode period Tt2 is a hover mode period and the first touch sensing mode period Tt1 is a contact mode period, the second amplitude ΔV2 of the second touch driving signal TDS2 may be greater than the first amplitude ΔV1 of the first touch driving signal TDS1, so as to further improve the sensing performance of hover touch.

[0160] The operation period of the touch display device 100 may also be referred to as the operation period of the display panel 110.

[0161] Reference Figure 4 , during the first touch sensing mode period Tt1, the first touch driving signal TDS1 may be applied to the plurality of first touch electrodes TE1. For example, during the first touch sensing mode period Tt1, the first touch driving signal TDS1 may be sequentially applied to each of the plurality of first touch electrodes TE1.

[0162] Reference Figure 4 , during the second touch sensing mode period Tt2, two or more of the plurality of first touch electrodes TE1 may be electrically connected to operate as one large first touch electrode TE1. In addition, during the second touch sensing mode period Tt2, two or more of the plurality of second touch electrodes TE2 may be electrically connected to operate as one large second touch electrode TE2.

[0163] Reference Figure 4 , during the second touch sensing mode period Tt2, the second touch driving signal TDS2 may be simultaneously applied to two or more of the plurality of first touch electrodes TE1 that are electrically connected to each other, or the second touch driving signal TDS2 may be simultaneously applied to two or more of the plurality of second touch electrodes TE2 that are electrically connected to each other.

[0164] As described above, the touch display device 100 according to an embodiment of the present disclosure may further include a display driving circuit for driving a plurality of sub-pixels SP, a display controller 140 for controlling the display driving circuit and providing a first mode control signal MCS1 to the touch controller 170, and a touch controller 170 for providing a second mode control signal MCS2 to the touch driving circuit 160. Here, the display driving circuit may include a data driving circuit 120, a gate driving circuit 130, and the like.

[0165] Referring Figure 4 to Figure 5 and, a display mode period Td and a touch sensing mode period Tt may be distinguished and defined by the first mode control signal MCS1 and the second mode control signal MCS2. For example, a display mode period Td, a first touch sensing mode period Tt1, and a second touch sensing mode period Tt2 may be distinguished and defined by the first mode control signal MCS1 and the second mode control signal MCS2.

[0166] The first mode control signal MCS1 may be a control signal for distinguishing a display mode period Td and a touch sensing mode period Tt, and the second mode control signal MCS2 may be a control signal for distinguishing a first touch sensing mode period Tt1 and a second touch sensing mode period Tt2.

[0167] Referring Figure 4 to, for example, the first mode control signal MCS1 may be a vertical synchronization signal VSYNC for dividing one display frame period into an active period and a blank period. In the vertical synchronization signal VSYNC, the active period may be the display mode period Td, and the blank period may be the touch sensing mode period Tt.

[0168] The vertical synchronization signal VSYNC may be one of display driving control signals DDCS provided from the host system 180 to the display controller 140.

[0169] The display controller 140 may provide the vertical synchronization signal VSYNC received from the host system 180 to the touch controller 170 as the first mode control signal MCS1.

[0170] Referring Figure 4 to, for example, the second mode control signal MCS2 may be a hover enable signal HOVER_EN for enabling a hover touch sensing mode as the second touch sensing mode.

[0171] Referring Figure 4, the first mode control signal MCS1 may include a first signal section S1 having a first level voltage LV1 and a second signal section S2 having a second level voltage LV2 different from the first level voltage LV1. For example, the first mode control signal MCS1 may include a first signal section S1 having a first level voltage LV1 during a touch sensing mode period Tt and a second signal section S2 having a second level voltage LV2 different from the first level voltage LV1 during a display mode period Td.

[0172] The second mode control signal MCS2 may include a third signal section S3 having a third level voltage LV3 and a fourth signal section S4 having a fourth level voltage LV4 different from the third level voltage LV3. For example, the second mode control signal MCS2 may include a third signal section S3 having a third level voltage LV3 during a display mode period Td and a first touch sensing mode period Tt1, and a fourth signal section S4 having a fourth level voltage LV4 different from the third level voltage LV3 during a second touch sensing mode period Tt2.

[0173] Reference Figure 4 , during the display mode period Td, the first mode control signal MCS1 may have a second level voltage LV2, and the second mode control signal MCS2 may have a third level voltage LV3.

[0174] Reference Figure 4 , during the first touch sensing mode period Tt1, the first mode control signal MCS1 may have a first level voltage LV1, and the second mode control signal MCS2 may have a third level voltage LV3.

[0175] Reference Figure 4 , during the second touch sensing mode period Tt2, the first mode control signal MCS1 may have a first level voltage LV1, and the second mode control signal MCS2 may have a fourth level voltage LV4.

[0176] The touch display device 100 according to an exemplary embodiment of the present disclosure may include: a display panel 110 including a plurality of sub-pixels SP and a plurality of touch electrodes TE; a display driving circuit for driving the plurality of sub-pixels SP; a touch driving circuit 160 for providing a touch driving signal to at least one of the plurality of touch electrodes TE; a display controller 140 for controlling the display driving circuit and providing a first mode control signal MCS1 to the touch controller 170; and a touch controller 170 for providing a second mode control signal MCS2 to the touch driving circuit 160.

[0177] Reference Figure 4 and Figure 5, the display mode period Td, the first touch sensing mode period Tt1, and the second touch sensing mode period Tt2 can be distinguished by the first mode control signal MCS1 and the second mode control signal MCS2.

[0178] Figure 6 FIG. 4 shows a touch driving circuit 160 according to an exemplary embodiment of the present disclosure, and Figure 7 FIG. 5 shows a charge amplifier CAMP in the touch driving circuit 160 according to an exemplary embodiment of the present disclosure.

[0179] Reference Figure 6 , the touch driving circuit 160 according to an exemplary embodiment of the present disclosure may include a sensing unit block SUBLK for sensing a touch sensor TS. The sensing unit block SUBLK may include a plurality of sensing units SU.

[0180] Reference Figure 6 , the touch driving circuit 160 according to an exemplary embodiment of the present disclosure may further include a first switch circuit SWC1, a second switch circuit SWC2, and an analog-to-digital converter ADC. For example, the first switch circuit SWC1 may be disposed between the touch sensor TS and the sensing unit block SUBLK to control the connection therebetween, and the second switch circuit SWC2 may be disposed between the sensing unit block SUBLK and the analog-to-digital converter ADC to control the connection therebetween.

[0181] Reference Figure 6 , the first switch circuit SWC1 may connect a touch electrode TE to be sensed among a plurality of touch electrodes TE included in the touch sensor TS to the sensing unit block SUBLK. The first switch circuit SWC1 may include a plurality of switches and may also be referred to as a multiplexer circuit.

[0182] Reference Figure 6 , the second switch circuit SWC2 may connect one of a plurality of sensing units SU included in the sensing unit block SUBLK to the analog-to-digital converter ADC. The second switch circuit SWC2 may include a plurality of switches and may also be referred to as a multiplexer circuit.

[0183] Reference Figure 6 , each of the plurality of sensing units SU may include a charge amplifier CAMP, an integrator INTG, and a sample and hold circuit SHA. For example, the integrator INTG may be connected between the charge amplifier CAMP and the sample and hold circuit SHA.

[0184] Reference Figure 6 , the charge amplifier CAMP may be electrically connected to one or more touch electrodes TE selected by the first switch circuit SWC1 among the plurality of touch electrodes TE included in the touch sensor TS.

[0185] The charge amplifier CAMP may receive a touch sensing signal from one or more touch electrodes TE selected as sensing targets among a plurality of connectable touch electrodes TE.

[0186] Reference Figure 6 , the first switch circuit SWC1 may connect the touch electrode TE serving as a sensing target among the plurality of connectable touch electrodes TE to the charge amplifier CAMP in the corresponding sensing unit SU among the plurality of sensing units SU.

[0187] Accordingly, the charge amplifier CAMP in the corresponding sensing unit SU may receive a touch sensing signal from the touch electrode TE serving as a sensing target. That is, the charge amplifier CAMP in the corresponding sensing unit SU may detect a touch sensing signal from the touch electrode TE serving as a sensing target. Here, the touch sensing signal detected in the touch electrode TE may correspond to a capacitance (e.g., mutual capacitance or self-capacitance) associated with the touch electrode TE.

[0188] Reference Figure 6 and Figure 7 , the charge amplifier CAMP may output an output signal VOUT corresponding to the touch sensing signal detected at the touch electrode TE. That is, the charge amplifier CAMP may output the output signal VOUT based on the touch sensing signal detected at the touch electrode TE.

[0189] Reference Figure 7 The charge amplifier CAMP may include an operational amplifier OAMP having a first input node IN1, a second input node IN2, and an output node OUT, and a feedback capacitor Cfb between the second input node IN2 and the output node OUT.

[0190] Reference Figure 7 The first input node IN1 may be a node to which an input signal VIN is input. The second input node IN2 may be a node electrically connected to the touch electrode TE selected by the first switch circuit SWC1. The output node OUT may be a node connected to the integrator INTG and may be a node that outputs the output signal VOUT.

[0191] Reference Figure 7, the charge corresponding to the capacitance of the touch electrode TE (e.g., self-capacitance or mutual capacitance) can be charged in the feedback capacitor Cfb, and the output signal VOUT corresponding to the amount of charge charged to the feedback capacitor Cfb can be output to the integrator INTG. Here, the touch driving circuit 160 detecting the touch sensing signal from the touch electrode TE can mean detecting the capacitance of the touch electrode TE (e.g., self-capacitance or mutual capacitance), and can mean charging the amount of charge corresponding to the capacitance of the touch electrode TE (e.g., self-capacitance or mutual capacitance) to the feedback capacitor Cfb and outputting the output signal VOUT corresponding to the charged amount of charge.

[0192] Reference Figure 7 , the charge amplifier CAMP may further include a reset switch RST that controls the connection between the second input node IN2 and the output node OUT. That is, when the reset switch RST is turned on, the second input node IN2 is connected to the output node OUT.

[0193] Reference Figure 6 , the integrator INTG can output an integration value by integrating the output signal VOUT of the charge amplifier CAMP. Here, the charge amplifier CAMP and the integrator INTG can be implemented in an integrated manner.

[0194] The sample and hold circuit SHA can store the integration value output from the integrator INTG until the next integration value is output from the integrator INTG.

[0195] The second switch circuit SWC2 can connect one of the plurality of sensing units SU included in the sensing unit block SUBLK to the analog-to-digital converter ADC.

[0196] The analog-to-digital converter ADC can convert the integration value in the sample and hold circuit SHA stored in the sensing unit SU selected by the second switch circuit SWC2 into a digital value to generate touch sensing data.

[0197] The touch driving circuit 160 can send the touch sensing data generated by the analog-to-digital converter ADC to the touch controller 170. In this case, the touch sensing data can be transmitted in the form of a differential signal.

[0198] In addition, reference Figure 7 , the input signal VIN input to the first input node IN1 of the charge amplifier CAMP can be a signal with a non-fluctuating voltage level or a signal with a fluctuating or swinging voltage level.

[0199] The type of the input signal VIN can vary according to the sensing method.

[0200] More specifically, if touch sensing is performed in a mutual sensing manner, the input signal VIN can be a reference voltage with a non-fluctuating voltage level. If touch sensing is performed in a self-sensing manner, the input signal VIN can be a second touch driving signal TDS2 with a fluctuating voltage level.

[0201] The type of the input signal VIN can vary according to the type of the touch sensing mode.

[0202] More specifically, during the first touch sensing mode period Tt1, the input signal VIN can be a reference voltage with a non-fluctuating voltage level. During the second touch sensing mode period Tt2, the input signal VIN can be a second touch driving signal TDS2 with a fluctuating voltage level.

[0203] Hereinafter, the circuit structure and operations during the first touch sensing mode period Tt1 and the second touch sensing mode period Tt2 will be described in more detail.

[0204] Figure 8 FIG. is a flowchart of an operation method of a touch display device 100 according to an exemplary embodiment of the present disclosure.

[0205] Reference Figure 8 , the operation method of the touch display device 100 according to an embodiment of the present disclosure may include a step (S100) in which a display driving circuit performs display driving through a display panel 110 to display an image during a display mode period Td, and a step (S200) in which a touch sensing circuit 150 performs touch sensing during a touch sensing mode period Tt.

[0206] The touch sensing mode period Tt may include a first touch sensing mode period Tt1 and a second touch sensing mode period Tt2 that do not overlap with each other in time.

[0207] During the first touch sensing mode period Tt1, contact touch sensing may be performed in a mutual sensing manner. During the second touch sensing mode period Tt2, hover touch sensing (i.e., non-contact touch sensing) may be performed in a self-sensing manner.

[0208] Reference Figure 8 , step S200 may include step (S210) and step (S220). In step (S210), the touch sensing circuit 150 senses contact touch in a mutual sensing manner during the first touch sensing mode period Tt1. In step (S220), the touch sensing circuit 150 senses hover touch (i.e., non-contact touch) in a self-sensing manner during the second touch sensing mode period Tt2.

[0209] The second touch sensing mode period Tt2 may include a first sub-sensing period Tt21 and a second sub-sensing period Tt22 that do not overlap with each other. The first sub-sensing period Tt21 may be a period for sensing a plurality of first touch electrodes TE1 in a self-sensing manner, and the second sub-sensing period Tt22 may be a period for sensing a plurality of second touch electrodes TE2 in a self-sensing manner.

[0210] Reference Figure 8 , step S220 may include step (S221) and step (S222). In step (S221), the touch sensing circuit 150 senses a plurality of first touch electrodes TE1 in a self-sensing manner during the first sub-sensing period Tt21. In step (S222), the touch sensing circuit 150 senses a plurality of second touch electrodes TE2 in a self-sensing manner during the second sub-sensing period Tt22.

[0211] In step S221, during the first sub-sensing period Tt21, a second touch driving signal TDS2 may be simultaneously applied to two or more first touch electrodes TE1 that are electrically connected to each other among the plurality of first touch electrodes TE1.

[0212] In step S222, during the second sub-sensing period Tt22, a second touch driving signal TDS2 may be simultaneously applied to two or more second touch electrodes TE2 that are electrically connected to each other among the plurality of second touch electrodes TE2.

[0213] Figure 9A and Figure 9B are diagrams showing driving situations when the operation period of the touch display device 100 according to an exemplary embodiment of the present disclosure is the first touch sensing mode period Tt1.

[0214] Reference Figure 9A and Figure 9B , during the first touch sensing mode period Tt1, an operation for sensing a contact touch in a mutual sensing manner may be performed.

[0215] Reference Figure 9A and Figure 9B , during the first touch sensing mode period Tt1, the touch driving circuit 160 may apply a first touch driving signal TDS1 having a first amplitude ΔV1 to at least one of the plurality of first touch electrodes TE1.

[0216] For example, during the first touch sensing mode period Tt1, the first touch driving signal TDS1 may be sequentially applied to the plurality of first touch electrodes TE1. That is, at any time point during the first touch sensing mode period Tt1, the first touch driving signal TDS1 may be applied to one first touch electrode TE1.

[0217] For another example, during the first touch sensing mode period Tt1, a plurality of first touch electrodes TE1 may be grouped into a plurality of first touch electrode groups. Each of the plurality of first touch electrode groups may include two or more first touch electrodes TE1. During the first touch sensing mode period Tt1, a first touch driving signal TDS1 may be sequentially applied to the plurality of first touch electrode groups. That is, at any time point during the first touch sensing mode period Tt1, the first touch driving signal TDS1 may be simultaneously applied to two or more first touch electrodes TE1 included in one first touch electrode group. In this way, when the first touch driving signal TDS1 is simultaneously applied to two or more first touch electrodes TE1 included in one first touch electrode group during the first touch sensing mode period Tt1, the first touch driving signal TDS1 applied to at least one of the two or more first touch electrodes TE1 and the first touch driving signal TDS1 applied to the remaining first touch electrodes TE1 may have a phase difference. For example, during the first touch sensing mode period Tt1, the first touch driving signal TDS1 applied to at least one of the two or more first touch electrodes TE1 and the first touch driving signal TDS1 applied to the remaining first touch electrodes TE1 may be in an anti-correlated relationship (e.g., 180-degree phase difference).

[0218] Reference Figure 9A and Figure 9B , during the first touch sensing mode period Tt1, a reference voltage VREF in the form of a DC voltage (i.e., a DC voltage) with an unchanged voltage level may be input to a first input node IN1 of a charge amplifier CAMP in the touch driving circuit 160.

[0219] Reference Figure 9A and Figure 9B , during the first touch sensing mode period Tt1, a second input node IN2 of the charge amplifier CAMP in the touch driving circuit 160 may be electrically connected to at least one of the plurality of second touch electrodes TE2.

[0220] Reference Figure 9A and Figure 9B , during the first touch sensing mode period Tt1, a mutual capacitance Cm may be formed between the first touch electrode TE1 and the second touch electrode TE2. Charges corresponding to the mutual capacitance Cm between the first touch electrode TE1 and the second touch electrode TE2 may be charged in a feedback capacitor Cfb of the charge amplifier CAMP. An output voltage VOUT corresponding to the amount of charge charged in the feedback capacitor Cfb may be output to an output node OUT of the charge amplifier CAMP. Reference Figure 6, the integrator INTG can output an integral value by integrating the output voltage VOUT of the charge amplifier CAMP.

[0221] Figure 10A and Figure 10B is a diagram showing a driving situation when the operation period of the touch display device 100 according to an exemplary embodiment of the present disclosure is the first sub-sensing period Tt21 during the second touch sensing mode period Tt2.

[0222] Figure 11A and Figure 11B is a diagram showing a driving situation when the operation period of the touch display device 100 according to an exemplary embodiment of the present disclosure is the second sub-sensing period Tt22 during the second touch sensing mode period Tt2.

[0223] Refer to Figure 10A , Figure 10B , Figure 11A and Figure 11B , during the second touch sensing mode period Tt2, an operation for sensing a hovering touch in a self-sensing manner can be performed.

[0224] Refer to Figure 10A , Figure 10B , Figure 11A and Figure 11B , during the second touch sensing mode period Tt2, the first sub-sensing period Tt21 can be first executed, and then the second sub-sensing period Tt22 can be executed. Alternatively, during the second touch sensing mode period Tt2, the second sub-sensing period Tt22 can be first executed, and then the first sub-sensing period Tt21 can be executed.

[0225] Refer to Figure 10A and Figure 10B , during the first sub-sensing period Tt21, a plurality of second touch electrodes TE2 can be in an electrically floating state. That is, during the first sub-sensing period Tt21, a plurality of second touch electrodes TE2 can be in a state where no electrical signal or voltage is applied.

[0226] Refer to Figure 10A and Figure 10B , during the first sub-sensing period Tt21, a second touch driving signal TDS2 having a variable voltage level can be input to the first input node IN1 of the charge amplifier CAMP in the touch driving circuit 160. The second touch driving signal TDS2 can have a second amplitude ΔV2 greater than the first amplitude ΔV1.

[0227] Refer to Figure 10A and Figure 10B, during the first sub-sensing period Tt21, the second input node IN2 of the charge amplifier CAMP in the touch driving circuit 160 can be electrically connected to at least one of the plurality of first touch electrodes TE1.

[0228] Therefore, the second touch driving signal TDS2 input to the first input node IN1 of the charge amplifier CAMP can be applied to at least one of the first touch electrodes TE1 connected to the second input node IN2 of the charge amplifier CAMP.

[0229] Reference Figure 10A and Figure 10B , during the first sub-sensing period Tt21, a self-capacitance Cs can be formed in the first touch electrode TE1. The charge corresponding to the self-capacitance Cs formed in the first touch electrode TE1 can be charged in the feedback capacitor Cfb of the charge amplifier CAMP. The output voltage VOUT corresponding to the amount of charge charged in the feedback capacitor Cfb can be output to the output node OUT of the charge amplifier CAMP. Reference Figure 6 , the integrator INTG can output an integration value by integrating the output voltage VOUT of the charge amplifier CAMP.

[0230] Reference Figure 11A and Figure 11B , during the second sub-sensing period Tt22, the plurality of first touch electrodes TE1 can be in an electrically floating state. That is, during the second sub-sensing period Tt22, the plurality of first touch electrodes TE1 can be in a state where no electrical signal or voltage is applied.

[0231] Reference Figure 11A and Figure 11B , during the second sub-sensing period Tt22, the second touch driving signal TDS2 can be input to the first input node IN1 of the charge amplifier CAMP in the touch driving circuit 160. The second touch driving signal TDS2 can have a second amplitude ΔV2 greater than the first amplitude ΔV1.

[0232] Reference Figure 11A and Figure 11B , during the second sub-sensing period Tt22, the second input node IN2 of the charge amplifier CAMP in the touch driving circuit 160 can be electrically connected to at least one of the plurality of second touch electrodes TE2.

[0233] Therefore, the second touch driving signal TDS2 input to the first input node IN1 of the charge amplifier CAMP can be applied to at least one of the second touch electrodes TE2 connected to the second input node IN2 of the charge amplifier CAMP.

[0234] Reference Figure 11A and Figure 11B During the second sub-sensing period Tt22, a self-capacitance Cs can be formed in the second touch electrode TE2. The charge corresponding to the self-capacitance Cs formed on the second touch electrode TE2 can be charged in the feedback capacitor Cfb of the charge amplifier CAMP. The output voltage VOUT corresponding to the amount of charge charged to the feedback capacitor Cfb can be output to the output node OUT of the charge amplifier CAMP. Reference Figure 6 The integrator INTG can output an integrated value by integrating the output voltage VOUT of the charge amplifier CAMP.

[0235] As described above, during the second touch sensing mode period Tt2 which is a hover mode period, self-sensing can be performed when sensing a non-contact touch.

[0236] In addition, the touch display device 100 according to an embodiment of the present disclosure can perform a signal control method for increasing the second amplitude ΔV2 of the second touch driving signal TDS2 in order to improve the sensing performance during the second touch sensing mode period Tt2 which is a hover mode period, and can also perform a sensing area expansion method for expanding the touch electrode area where the second touch driving signal TDS2 is simultaneously applied and sensed.

[0237] The touch display device 100 according to an embodiment of the present disclosure can bind two or more of the plurality of first touch electrodes TE1 to one first sensing group (hereinafter referred to as a horizontal binding group), and can bind two or more of the plurality of second touch electrodes TE2 to one second sensing group (hereinafter referred to as a vertical binding group) in order to perform the sensing area expansion method.

[0238] Hereinafter, a method for improving the self-sensing performance during the second touch sensing mode period Tt2 which is a hover mode period will be described in more detail.

[0239] Figure 12 Binding groups BG1_1, BG1_2, BG2_1, BG2_2, and BG2_3 for the touch sensor TS according to an exemplary embodiment of the present disclosure are exemplarily shown. For example, Figure 12 Two horizontal binding groups BG1_1 and BG1_2 and three vertical binding groups BG2_1, BG2_2, and BG2_3 are exemplarily shown.

[0240] Reference Figure 12, to explain a sensing area expansion method for improving self-sensing performance during a second touch sensing mode period Tt2 that is a hovering mode period, a case where a touch sensor TS includes six first touch electrodes TE1_1 to TE1_6 and nine second touch electrodes TE2_1 to TE2_9 will be illustrated.

[0241] Reference Figure 12 , the six first touch electrodes TE1_1 to TE1_6 may be grouped in sets of three to include two horizontal binding groups BG1_1 and BG1_2, but is not limited thereto. The nine second touch electrodes TE2_1 to TE2_9 may be grouped in sets of three to include three vertical binding groups BG2_1, BG2_2, and BG2_3, but is not limited thereto.

[0242] Reference Figure 12 , the three first touch electrodes included in each of the two horizontal binding groups BG1_1 and BG1_2 may be electrically connected to each other. The three second touch electrodes included in each of the three vertical binding groups BG2_1, BG2_2, and BG2_3 may be electrically connected to each other.

[0243] If the touch display device 100 according to an embodiment of the present disclosure does not adopt the binding technique for the sensing area expansion method during the second touch sensing mode period Tt2 that is a hovering mode period during self-sensing, a conventional unit sensor node USN may be an area where one first touch electrode TE1_1 and one second touch electrode TE2_1 intersect, but is not limited thereto.

[0244] Alternatively, if the touch display device 100 according to an embodiment of the present disclosure adopts the binding technique for the sensing area expansion method during the second touch sensing mode period Tt2 that is a hovering mode period during self-sensing, an extended unit sensor node EUSN may be an area where the binding group BG1_1 and the binding group BG1_2 intersect, such as an area where three first touch electrodes TE1_1, TE1_2, and TE1_3 intersect with three second touch electrodes TE2_1, TE2_2, and TE2_3, but is not limited thereto.

[0245] The extended unit sensor node EUSN may be significantly larger than the conventional unit sensor node USN. According to Figure 12 's example, the extended unit sensor node EUSN is approximately nine times larger than the conventional unit sensor node USN.

[0246] If the touch display device 100 according to an embodiment of the present disclosure adopts the binding technique for the sensing area expansion method during the second touch sensing mode period Tt2 that is a hovering mode period, the self-sensing performance of non-contact touch can be improved, and the self-sensing speed can also be increased.

[0247] If the touch display device 100 according to an embodiment of the present disclosure applies a binding technique for a sensing area expansion method during a second touch sensing mode period Tt2 which is a hovering mode period, the second touch driving signal TDS2 may be simultaneously applied to at least one of binding groups BG1_1, BG1_2, BG2_1, BG2_2, and BG2_3.

[0248] Reference Figure 12 , since six first touch electrodes TE1_1 to TE1_6 intersect and overlap with nine second touch electrodes TE2_1 to TE2_9, an unwanted parasitic capacitance may be generated between the binding group provided with the second touch driving signal TDS2 and the binding group not applied with the second touch driving signal TDS2.

[0249] Due to the appearance of this parasitic capacitance, the load of the binding group applied with the second touch driving signal TDS2 may increase, and the sensing performance may deteriorate. Here, the load of the binding group applied with the second touch driving signal TDS2 may be a resistance-capacitance (RC) delay value of touch electrodes included in the binding group.

[0250] Therefore, when the touch display device 100 according to an embodiment of the present disclosure applies a binding technique for a sensing area expansion method during a second touch sensing mode period Tt2 which is a hovering mode period, an auxiliary driving method capable of preventing the formation of parasitic capacitance may be performed.

[0251] Hereinafter, the auxiliary driving method during a second touch sensing mode period Tt2 which is a hovering mode period will be described in detail.

[0252] Figure 13 And Figure 14 Exemplarily shown are touch driving and auxiliary driving for binding groups BG1_1, BG1_2, BG2_1, BG2_2, and BG2_3 of a touch sensor TS according to an embodiment of the present disclosure. For example, Figure 13 And Figure 14 Exemplarily shown are two horizontal binding groups BG1_1 and BG1_2 and three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0253] Reference Figure 13 And Figure 14 , six first touch electrodes TE1_1 to TE1_6 may be grouped in threes to include two horizontal binding groups BG1_1 and BG1_2. Nine second touch electrodes TE2_1 to TE2_9 may be grouped in threes to include three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0254] Reference Figure 13 During the second touch sensing mode period Tt2, which is the hovering mode period, the touch driving circuit 160 can perform self-sensing on the first horizontal binding group BG1_1 among the two horizontal binding groups BG1_1 and BG1_2 at a time point. That is, at any time point during the second touch sensing mode period Tt2, which is the hovering mode period, the touch driving circuit 160 can perform touch driving on the first horizontal binding group BG1_1 and sense the first horizontal binding group BG1_1.

[0255] Reference Figure 13 When the touch driving circuit 160 performs touch driving on the first horizontal binding group BG1_1, it can mean simultaneously providing the second touch driving signal TDS2 to the three first touch electrodes TE1_1, TE1_2, and TE1_3 included in the first horizontal binding group BG1_1.

[0256] Reference Figure 13 When the touch driving circuit 160 senses the first horizontal binding group BG1_1, it can mean sensing the capacitance formed by the three first touch electrodes TE1_1, TE1_2, and TE1_3 included in the first horizontal binding group BG1_1 as a whole.

[0257] Reference Figure 13 In the self-sensing of the first horizontal binding group BG1_1, the three first touch electrodes TE1_1, TE1_2, and TE1_3 included in the first horizontal binding group BG1_1 can form parasitic capacitances with other surrounding touch electrodes TE1_4 to TE1_6 and TE2_1 to TE2_9.

[0258] Reference Figure 13 The touch driving circuit 160 can perform auxiliary driving to prevent the formation of parasitic capacitances in the first horizontal binding group BG1_1 sensed at the current time.

[0259] Reference Figure 13 When performing self-sensing on the first horizontal binding group BG1_1, the touch driving circuit 160 can provide an auxiliary driving signal ADS having signal characteristics that are exactly the same as or substantially the same as those of the second touch driving signal TDS2 to the second horizontal binding group BG1_2 other than the first horizontal binding group BG1_1 among the two horizontal binding groups BG1_1 and BG1_2.

[0260] Therefore, since no potential difference or a reduced potential difference will occur between the first horizontal binding group BG1_1 and the second horizontal binding group BG1_2, no parasitic capacitance or a reduced parasitic capacitance will occur between the first horizontal binding group BG1_1 and the second horizontal binding group BG1_2.

[0261] In addition, when performing self-sensing on the first horizontal binding group BG1_1, the touch driving circuit 160 may provide an auxiliary driving signal ADS having the same or substantially the same signal characteristics as the second touch driving signal TDS2 to the three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0262] Therefore, since no potential difference or a reduced potential difference occurs between the first horizontal binding group BG1_1 and the three vertical binding groups BG2_1, BG2_2, and BG2_3, no parasitic capacitance or a reduced parasitic capacitance may occur between the first horizontal binding group BG1_1 and the three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0263] Reference Figure 14 During any time point in the second touch sensing mode period Tt2 as the hovering mode period, the touch driving circuit 160 may perform self-sensing on the first vertical binding group BG2_1 among the three vertical binding groups BG2_1, BG2_2, and BG2_3. That is, during any time point in the second touch sensing mode period Tt2 as the hovering mode period, the touch driving circuit 160 may perform touch driving on the first vertical binding group BG2_1 and sense the first vertical binding group BG2_1.

[0264] Reference Figure 14 As shown in FIG. 3, the touch driving circuit 160 performing touch driving on the first vertical binding group BG2_1 may mean simultaneously providing the second touch driving signal TDS2 to the three second touch electrodes TE2_1, TE2_2, and TE2_3 included in the first vertical binding group BG2_1.

[0265] Reference Figure 14 As shown in FIG. 4, the touch driving circuit 160 sensing the first vertical binding group BG2_1 may mean sensing the capacitance formed by the three second touch electrodes TE2_1, TE2_2, and TE2_3 included in the first vertical binding group BG2_1 as a whole.

[0266] Reference Figure 14 As shown in FIG. 5, when performing self-sensing on the first vertical binding group BG2_1, the three second touch electrodes TE2_1, TE2_2, and TE2_3 included in the first vertical binding group BG2_1 may form parasitic capacitances with other surrounding touch electrodes TE1_1 to TE1_6 and TE2_4 to TE2_9.

[0267] Reference Figure 14 As shown in FIG. 6, the touch driving circuit 160 may perform auxiliary driving to prevent the formation of parasitic capacitances in the first vertical binding group BG2_1 sensed at the current time.

[0268] Reference Figure 14When performing self-sensing on the first vertical binding group BG2_1, the touch driving circuit 160 can provide an auxiliary driving signal ADS having signal characteristics that are exactly the same as or substantially the same as those of the second touch driving signal TDS2 to the second vertical binding group BG2_2 and the third vertical binding group BG2_3, which are the vertical binding groups other than the first vertical binding group BG2_1 among the three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0269] Therefore, since no potential difference or reduction in potential difference occurs between the first vertical binding group BG2_1 and the second vertical binding group BG2_2 and the third vertical binding group BG2_3, no parasitic capacitance or reduction in parasitic capacitance may occur between the first vertical binding group BG2_1 and the second vertical binding group BG2_2 and the third vertical binding group BG2_3.

[0270] In addition, when performing self-sensing on the first vertical binding group BG2_1, the touch driving circuit 160 can provide an auxiliary driving signal ADS having signal characteristics that are exactly the same as or substantially the same as those of the second touch driving signal TDS2 to the two horizontal binding groups BG1_1 and BG1_2.

[0271] Therefore, since no potential difference or reduction in potential difference occurs between the first vertical binding group BG2_1 and the two horizontal binding groups BG1_1 and BG1_2, no parasitic capacitance or reduction in parasitic capacitance may occur between the first vertical binding group BG2_1 and the two horizontal binding groups BG1_1 and BG1_2.

[0272] Reference Figure 13 and Figure 14 , the configuration in which the auxiliary driving signal ADS has signal characteristics that are exactly the same as or substantially the same as those of the second touch driving signal TDS2 may mean that the phases of the auxiliary driving signal ADS and the second touch driving signal TDS2 are exactly the same or substantially the same within a tolerance range.

[0273] In addition, the configuration in which the auxiliary driving signal ADS has the same or similar signal characteristics as the second touch driving signal TDS2 may mean that the frequency of the auxiliary driving signal ADS is exactly the same as or substantially the same as the frequency of the second touch driving signal TDS2 within a tolerance range.

[0274] In addition, the configuration in which the auxiliary driving signal ADS has the same or similar signal characteristics as the second touch driving signal TDS2 may mean that the amplitude ΔVa of the auxiliary driving signal ADS is exactly the same as or substantially the same as the second amplitude ΔV2 of the second touch driving signal TDS2 within a tolerance range.

[0275] In summary, the touch display device 100 according to the exemplary embodiment of the present disclosure may include: a touch sensor TS including a plurality of first touch electrodes TE1 and a plurality of second touch electrodes TE2; and a touch driving circuit 160 configured to provide a touch driving signal TDS to the touch sensor TS during a touch sensing mode period Tt.

[0276] The touch sensing mode period Tt may include a first touch sensing mode period Tt1 and a second touch sensing mode period Tt2. During the first touch sensing mode period Tt1, a first touch driving signal TDS1 is applied to the touch sensor TS as the touch driving signal. During the second touch sensing mode period Tt2, a second touch driving signal TDS2 is applied to the touch sensor TS as the touch driving signal. For example, the touch sensing mode period Tt may include a first touch sensing mode period Tt1 and a second touch sensing mode period Tt2. During the first touch sensing mode period Tt1, a first touch driving signal TDS1 having a first amplitude ΔV1 is applied to the touch sensor TS as the touch driving signal TDS. During the second touch sensing mode period Tt2, a second touch driving signal TDS2 having a second amplitude ΔV2 greater than the first amplitude ΔV1 is applied to the touch sensor TS as the touch driving signal TDS.

[0277] During the second touch sensing mode period Tt2, the touch driving circuit 160 may provide the second touch driving signal TDS2 to a part of the touch sensor TS (e.g., at least one sensed binding group) and provide an auxiliary driving signal ADS to another part of the touch sensor TS (e.g., at least one unsensed binding group).

[0278] The "auxiliary driving" of the touch display device 100 according to an embodiment of the present disclosure may mean that during the second touch sensing mode period Tt2 in which self-sensing is performed in units of binding groups, when the second touch driving signal TDS2 is applied to the sensed binding group, the auxiliary driving signal ADS is applied to the unsensed binding group.

[0279] During the second touch sensing mode period Tt2, in order to prevent or reduce the occurrence of unnecessary parasitic capacitance, the signal characteristics of the auxiliary driving signal ADS may be exactly the same as or substantially the same as the signal characteristics of the second touch driving signal TDS2.

[0280] For example, the auxiliary driving signal ADS and the second touch driving signal TDS2 may have the same phase. The frequency of the auxiliary driving signal ADS may be the same as the frequency of the second touch driving signal TDS2. The amplitude ΔVa of the auxiliary driving signal ADS may be exactly the same as or substantially the same as the second amplitude ΔV2 of the second touch driving signal TDS2 within a tolerance range.

[0281] For example, the auxiliary drive signal ADS and the second touch drive signal TDS2 may have at least one of exactly the same or substantially the same phase, frequency, and amplitude. As another example, the auxiliary drive signal ADS and the second touch drive signal TDS2 may have all of exactly the same or substantially the same phase, frequency, and amplitude.

[0282] Hereinafter, the "auxiliary drive" of the touch display device 100 according to an embodiment of the present disclosure will be described in more detail.

[0283] Figure 15 A touch sensing system having an auxiliary drive function according to an exemplary embodiment of the present disclosure is shown.

[0284] Reference Figure 15 , a touch sensing system having an auxiliary drive function according to an exemplary embodiment of the present disclosure may include a touch drive circuit 160, a touch controller 170, and a display controller 140. The touch drive circuit 160 may provide a first touch drive signal TDS1, a second touch drive signal TDS2, and an auxiliary drive signal ADS to the touch sensor TS.

[0285] The touch drive circuit 160 may provide the first touch drive signal TDS1 to the plurality of first touch electrodes TE1 during a first touch sensing mode period Tt1 and sense each of the plurality of first touch electrodes TE1 provided with the first touch drive signal TDS1.

[0286] The touch drive circuit 160 may provide the second touch drive signal TDS2 to each of the plurality of horizontal binding groups during a part of a second touch sensing mode period Tt2 and sense each of the plurality of horizontal binding groups provided with the second touch drive signal TDS2. At this time, the touch drive circuit 160 may provide the auxiliary drive signal ADS to each of the plurality of vertical binding groups and at least one horizontal binding group not applied with the second touch drive signal TDS2.

[0287] In addition, the touch drive circuit 160 may provide the second touch drive signal TDS2 to each of the plurality of vertical binding groups during the second touch sensing mode period Tt2 and sense each of the plurality of vertical binding groups provided with the second touch drive signal TDS2. At this time, the touch drive circuit 160 may provide the auxiliary drive signal ADS to each of the plurality of horizontal binding groups and at least one vertical binding group not applied with the second touch drive signal TDS2.

[0288] Each of the plurality of horizontal binding groups may include two or more first touch electrodes TE1 electrically connected to each other. Each of the plurality of vertical binding groups may include two or more second touch electrodes TE2 electrically connected to each other.

[0289] That is, the second touch sensing mode period Tt2 may include a first sub-sensing period and a second sub-sensing period. In the first sub-sensing period, the second touch driving signal TDS2 is simultaneously applied to two or more first touch electrodes TE1 that are electrically connected to each other among the plurality of first touch electrodes TE1. In the second sub-sensing period, the second touch driving signal TDS2 is simultaneously applied to two or more second touch electrodes TE2 that are electrically connected to each other among the plurality of second touch electrodes TE2.

[0290] During the first sub-sensing period, which is part of the second touch sensing mode period Tt2, the touch driving circuit 160 may provide the auxiliary driving signal ADS to the remaining first touch electrodes TE1 other than the two or more first touch electrodes TE1 to which the second touch driving signal TDS2 is simultaneously applied and / or the plurality of second touch electrodes TE2.

[0291] During the second sub-sensing period, which is another part of the second touch sensing mode period Tt2, the touch driving circuit 160 may provide the auxiliary driving signal ADS to the remaining second touch electrodes TE2 other than the two or more second touch electrodes TE2 to which the second touch driving signal TDS2 is simultaneously applied and / or the plurality of first touch electrodes TE1.

[0292] The touch controller 170 may overall control the touch sensing operation of the touch display device 100 and control the operation of the touch driving circuit 160.

[0293] The display controller 140 may notify the touch controller 170 of the driving timing related to the display operation, so that the touch controller 170 may control the driving timing related to the touch sensing operation.

[0294] Reference Figure 15 , the touch sensing system with an auxiliary driving function according to an exemplary embodiment of the present disclosure may further include a touch power circuit 1500 for providing various powers required for touch driving. The touch power circuit 1500 may be configured to output an external auxiliary driving signal.

[0295] In addition, reference Figure 15, the touch driving circuit 160 may perform auxiliary driving during the second touch sensing mode period Tt2. More specifically, during the second touch sensing mode period Tt2, when the touch driving circuit 160 provides the second touch driving signal TDS2 to the sensing binding group, it may provide the auxiliary driving signal ADS to the non-sensing binding group (including the non-sensing horizontal binding group and / or the non-sensing vertical binding group).

[0296] The touch driving circuit 160 also receives the auxiliary driving control signal ADCS from the touch controller 170, and outputs an external auxiliary driving signal as the auxiliary driving signal ADS according to the auxiliary driving control signal ADCS, or generates and outputs an internal auxiliary driving signal as the auxiliary driving signal ADS based on a reference driving signal DS_REF input from the outside (such as the touch controller 170, etc.).

[0297] The touch driving circuit 160 may perform auxiliary driving in at least one of an external driving method and an internal driving method.

[0298] For example, during one second touch sensing mode period Tt2, both external driving type auxiliary driving and internal driving type auxiliary driving may be performed. As another example, during one second touch sensing mode period Tt2, only external driving type auxiliary driving may be performed. As another example, during one second touch sensing mode period Tt2, only internal driving type auxiliary driving may be performed.

[0299] Reference Figure 15 , when performing external driving type auxiliary driving, the touch driving circuit 160 may output an external auxiliary driving signal ADS_EX input from the outside (such as the touch power supply circuit 1500, etc.) in a bypass form as the auxiliary driving signal ADS.

[0300] The external auxiliary driving signal ADS_EX and the second touch driving signal TDS2 may have the same phase. In addition, the external auxiliary driving signal ADS_EX and the second touch driving signal TDS2 may have the same frequency and amplitude.

[0301] Reference Figure 15 , when performing internal driving type auxiliary driving, the touch driving circuit 160 may generate an internal auxiliary driving signal ADS_IN based on a reference driving signal DS_REF input from the outside (such as the touch controller 170, etc.), and output the internal auxiliary driving signal ADS_IN as the auxiliary driving signal ADS.

[0302] The internal auxiliary driving signal ADS_IN and the second touch driving signal TDS2 may have the same phase. In addition, the internal auxiliary driving signal ADS_IN and the second touch driving signal TDS2 may have the same frequency and amplitude.

[0303] In the following, components included in a touch sensing system having an auxiliary driving function according to an exemplary embodiment of the present disclosure will be described in more detail.

[0304] Referring Figure 15 , a touch driving circuit 160 according to an exemplary embodiment of the present disclosure may include a first touch driving signal output unit 1510, a sensing unit 1520, and an auxiliary driving signal output unit 1540.

[0305] The first touch driving signal output unit 1510 may supply a first touch driving signal TDS1 having a first amplitude ΔV1 to each of a plurality of first touch electrodes TE1 during a first touch sensing mode period Tt1.

[0306] The sensing unit 1520 may sense each of a plurality of second touch electrodes TE2 during the first touch sensing mode period Tt1.

[0307] The sensing unit 1520 may supply a second touch driving signal TDS2 having a second amplitude ΔV2 greater than the first amplitude ΔV1 to two or more of the plurality of touch electrodes during a second touch sensing mode period Tt2, and may sense two or more of the touch electrodes (e.g., sensing touch electrodes) to which the second touch driving signal TDS2 is supplied.

[0308] The sensing unit 1520 may include Figure 6 the sensing unit block SUBLK.

[0309] The auxiliary driving signal output unit 1540 may supply an auxiliary driving signal ADS to two or more of the plurality of touch electrodes (e.g., non-sensing touch electrodes included in a non-sensing binding group) to which the second touch driving signal TDS2 is not applied during the second touch sensing mode period Tt2.

[0310] Referring Figure 15 , the touch controller 170 may receive a first mode control signal MCS1, and output a reference driving signal DS_REF and a second mode control signal MCS2 to the touch driving circuit 160.

[0311] The touch driving circuit 160 may receive the reference driving signal DS_REF and the second mode control signal MCS2 from the touch controller 170, and output a touch driving signal TDS and an auxiliary driving signal ADS according to the reference driving signal DS_REF and the second mode control signal MCS2.

[0312] Referring Figure 15, the touch power circuit 1500 can output an external auxiliary drive signal ADS_EX to the touch drive circuit 160.

[0313] Reference Figure 15 , the touch drive circuit 160 can also receive an auxiliary drive control signal ADCS from the touch controller 170, and according to the auxiliary drive control signal ADCS, output the external auxiliary drive signal ADS_EX as the auxiliary drive signal ADS, or generate an internal auxiliary drive signal ADS_IN based on the reference drive signal DS_REF and output the internal auxiliary drive signal ADS_IN as the auxiliary drive signal ADS.

[0314] Reference Figure 15 , the touch drive circuit 160 according to an embodiment of the present disclosure may further include a drive signal generation unit 1530.

[0315] The drive signal generation unit 1530 can generate an internal auxiliary drive signal ADS_IN having signal characteristics substantially the same as those of the second touch drive signal TDS2 based on an input reference drive signal DS_REF input from the outside (e.g., the touch controller 170, etc.), and output the internal auxiliary drive signal ADS_IN as the auxiliary drive signal ADS.

[0316] The auxiliary drive signal output unit 1540 can supply the auxiliary drive signal ADS generated by the drive signal generation unit 1530 to the touch electrodes (e.g., non-sensing touch electrodes) among the plurality of touch electrodes that are not applied with the second touch drive signal TDS2 during the second touch sensing mode period Tt2.

[0317] Reference Figure 15 , the touch drive circuit 160 according to an embodiment of the present disclosure may further include a bonding circuit 1550, and the bonding circuit 1550 controls the electrical connection between the plurality of first touch electrodes TE1 and the electrical connection between the plurality of second touch electrodes TE2.

[0318] The bonding circuit 1550 can electrically isolate the plurality of first touch electrodes TE1 and electrically isolate the plurality of second touch electrodes TE2 during the first touch sensing mode period Tt1.

[0319] The bonding circuit 1550 can electrically connect two or more of the first touch electrodes TE1 among the plurality of first touch electrodes TE1 that are simultaneously applied with the second touch drive signal TDS2 during the second touch sensing mode period Tt2, or can electrically connect two or more of the second touch electrodes TE2 among the plurality of second touch electrodes TE2 that are simultaneously applied with the second touch drive signal TDS2.

[0320] By using the bonding circuit 1550, during the first touch sensing mode period Tt1, a plurality of first touch electrodes TE1 can be electrically separated, and a plurality of second touch electrodes TE2 can be electrically separated.

[0321] Accordingly, during the first touch sensing mode period Tt1, a first touch driving signal TDS1 can be applied to at least one of the plurality of first touch electrodes TE1 or at least one of the plurality of second touch electrodes TE2.

[0322] By using the bonding circuit 1550, during the second touch sensing mode period Tt2, two or more of the plurality of first touch electrodes TE1 among the plurality of first touch electrodes TE1 can be electrically connected to each other, or two or more of the plurality of second touch electrodes TE2 among the plurality of second touch electrodes TE2 can be electrically connected to each other.

[0323] Accordingly, during the second touch sensing mode period Tt2, a second touch driving signal TDS2 can be applied to two or more of the plurality of first touch electrodes TE1 among the plurality of first touch electrodes TE1, or to two or more of the plurality of second touch electrodes TE2 among the plurality of second touch electrodes TE2.

[0324] The first touch sensing mode period Tt1 can be a contact mode period for sensing a contact touch that has touched the screen, and the second touch sensing mode period Tt2 can be a hover mode period for sensing a non-contact touch (e.g., a hover touch) that has not touched the screen.

[0325] Reference Figure 15 , the display controller 140 can output a first mode control signal MCS1 to the touch controller 170 to notify the touch controller 170 of the driving timing related to the display operation.

[0326] For example, the first mode control signal MCS1 can be a vertical synchronization signal VSYNC for defining the display frame time. The second mode control signal MCS2 can be a hover enable signal HOVER_EN for enabling the hover mode. The auxiliary driving control signal ADCS can be a signal for controlling the auxiliary driving method, and can also be referred to as a hover sensing signal HOVER_SEN.

[0327] Hereinafter, the first mode control signal MCS1, the second mode control signal MCS2, and the auxiliary driving control signal ADCS will be described in more detail, and a method for controlling the driving timing according to the first mode control signal MCS1, the second mode control signal MCS2, and the auxiliary driving control signal ADCS will be described.

[0328] Figures 16 to 18Shows a driving timing diagram of the touch display device 100 according to an exemplary embodiment of the present disclosure.

[0329] Reference Figures 16 to 18 , according to an embodiment of the present disclosure, the touch display device 100 can control the operation timing by using the first mode control signal MCS1, the second mode control signal MCS2, and the auxiliary drive control signal ADCS.

[0330] Reference Figures 16 to 18 , the operation period of the touch display device 100 according to an embodiment of the present disclosure may include a display mode period Td for displaying an image and a touch sensing mode period Tt including a first touch sensing mode period Tt1 and a second touch sensing mode period Tt2.

[0331] Reference Figures 16 to 18 , the display mode period Td may be a period during which the touch display device 100 operates in the display mode, and the touch sensing mode period Tt may be a period during which the touch display device 100 operates in the touch sensing mode.

[0332] Reference Figures 16 to 18 , the display mode period Td, the first touch sensing mode period Tt1, and the second touch sensing mode period Tt2 may be defined by the first mode control signal MCS1 and the second mode control signal MCS2 having different signal waveforms.

[0333] Reference Figures 16 to 18 , the first mode control signal MCS1 may include a first signal section S1 having a first level voltage LV1 and a second signal section S2 having a second level voltage LV2 different from the first level voltage LV1. For example, the first mode control signal MCS1 may include a first signal section S1 having the first level voltage LV1 during the touch sensing mode period Tt and a second signal section S2 having a second level voltage LV2 different from the first level voltage LV1 during the display mode period Td.

[0334] Reference Figures 16 to 18 , the second mode control signal MCS2 may include a third signal section S3 having a third level voltage LV3 and a fourth signal section S4 having a fourth level voltage LV4 different from the third level voltage LV3. For example, the second mode control signal MCS2 may include a third signal section S3 having the third level voltage LV3 during the display mode period Td and the first touch sensing mode period Tt1, and a fourth signal section S4 having a fourth level voltage LV4 different from the third level voltage LV3 during the second touch sensing mode period Tt2.

[0335] Reference Figures 16 to 18, the auxiliary drive control signal ADCS may include at least one of a fifth signal section S5 having a fifth-level voltage LV5 and a sixth signal section S6 having a sixth-level voltage LV6 different from the fifth-level voltage LV5.

[0336] Reference Figures 16 to 18 , during the display mode period Td, the first mode control signal MCS1 may have a second-level voltage LV2, and the second mode control signal MCS2 may have a third-level voltage LV3.

[0337] During the display mode period Td, each of the touch drive signal TDS, the reference drive signal DS_REF, and the auxiliary drive signal ADS may be a DC voltage having a constant voltage level.

[0338] Reference Figures 16 to 18 , during the first touch sensing mode period Tt1, the first mode control signal MCS1 may have a first-level voltage LV1, and the second mode control signal MCS2 may have a third-level voltage LV3.

[0339] During the first touch sensing mode period Tt1, each of the touch drive signal TDS and the reference drive signal DS_REF may be a voltage whose voltage level fluctuates or swings according to a predetermined frequency.

[0340] During the first touch sensing mode period Tt1, the reference drive signal DS_REF may have a reference amplitude ΔV0, and the touch drive signal TDS may be a first touch drive signal TDS1 having a first amplitude ΔV1. Here, the first amplitude ΔV1 may be equal to or different from the reference amplitude ΔV0. For example, the first amplitude ΔV1 may be greater than the reference amplitude ΔV0.

[0341] During the first touch sensing mode period Tt1, the auxiliary drive signal ADS may be a DC voltage having a fixed voltage level.

[0342] Reference Figures 16 to 18 , during the second touch sensing mode period Tt2, the first mode control signal MCS1 may have a first-level voltage LV1, and the second mode control signal MCS2 may have a fourth-level voltage LV4.

[0343] During the second touch sensing mode period Tt2, each of the touch drive signal TDS, the reference drive signal DS_REF, and the auxiliary drive signal ADS may be a voltage whose voltage level fluctuates or swings according to a predetermined frequency.

[0344] During the second touch sensing mode period Tt2, the reference drive signal DS_REF may have a reference amplitude ΔV0, the touch drive signal TDS may be a second touch drive signal TDS2 having a second amplitude ΔV2, and the auxiliary drive signal ADS may have the second amplitude ΔV2.

[0345] Here, the second amplitude ΔV2 may be greater than the first amplitude ΔV1. The second amplitude ΔV2 may be equal to or different from the reference amplitude ΔV0. For example, the second amplitude ΔV2 may be greater than the reference amplitude ΔV0.

[0346] Reference Figures 16 to 18 , during the second touch sensing mode period Tt2, the auxiliary drive control signal ADCS may include at least one of a fifth signal section S5 having a fifth level voltage LV5 and a sixth signal section S6 having a sixth level voltage LV6.

[0347] Reference Figure 16 , the second touch sensing mode period Tt2 may include an internal drive period Tin and an external drive period Tex.

[0348] During the internal drive period Tin, the auxiliary drive control signal ADCS may be a fifth signal section S5 having a fifth level voltage LV5, and the auxiliary drive signal ADS may be an internal auxiliary drive signal ADS_IN.

[0349] During the external drive period Tex, the auxiliary drive control signal ADCS may be a sixth signal section S6 having a sixth level voltage LV6, and the auxiliary drive signal ADS may be an external auxiliary drive signal ADS_EX.

[0350] Specifically, the auxiliary drive control signal ADCS may be a fifth signal section S5 having a fifth level voltage LV5 during the display mode period Td, the first touch sensing mode period Tt1, and the internal drive period Tin, and the auxiliary drive signal ADS may be the internal auxiliary drive signal ADS_IN during the external drive period Tex.

[0351] As Figure 16 a modified example, the second touch sensing mode period Tt2 may include an internal drive period Tin and an external drive period Tex, and may further include at least one internal drive period Tin and / or at least one external drive period Tex.

[0352] Reference Figure 17 , the second touch sensing mode period Tt2 may include an external drive period Tex.

[0353] During the external driving period Tex, the auxiliary driving control signal ADCS may include a sixth signal section S6 having a sixth level voltage LV6, and the auxiliary driving signal ADS may be an external auxiliary driving signal ADS_EX.

[0354] For example, the auxiliary driving control signal ADCS may include a fifth signal section S5 having a fifth level voltage LV5 during the display mode period Td and the first touch sensing mode period Tt1, and a sixth signal section S6 having a sixth level voltage LV6 during the external driving period Tex.

[0355] Reference Figure 18 , the second touch sensing mode period Tt2 may include an internal driving period Tin.

[0356] During the internal driving period Tin, the auxiliary driving control signal ADCS may include a fifth signal section S5 having a fifth level voltage LV5, and the auxiliary driving signal ADS may be an internal auxiliary driving signal ADS_IN.

[0357] For example, the auxiliary driving control signal ADCS may include a fifth signal section S5 having a fifth level voltage LV5 during the display mode period Td, the first touch sensing mode period Tt1, and the internal driving period Tin.

[0358] Reference Figure 16 and Figure 18 , in the second touch sensing mode period Tt2, when the auxiliary driving control signal ADCS is in the fifth signal section S5, the auxiliary driving signal ADS may be an internal auxiliary driving signal ADS_IN.

[0359] Reference Figure 16 and Figure 17 , in the second touch sensing mode period Tt2, when the auxiliary driving control signal ADCS is in the sixth signal section S6, the auxiliary driving signal ADS may be an external auxiliary driving signal ADS_EX.

[0360] Figures 19 to 21 FIG. shows a signal output structure of a touch driving circuit 160 according to an exemplary embodiment of the present disclosure. In the following description, reference is also made to Figures 15 to 18 .

[0361] Figure 19 FIG. shows a signal output structure for supplying a second touch driving signal TDS2 to a sensing touch electrode (e.g., sensing TE) during the second touch sensing mode period Tt2, Figure 20A signal output structure for supplying an external auxiliary driving signal ADS_EX as an auxiliary driving signal ADS to a non-sensing touch electrode (e.g., non-sensing TE) during a second touch sensing mode period Tt2 is shown, and Figure 21 A signal output structure for supplying an internal auxiliary driving signal ADS_IN as an auxiliary driving signal ADS to a non-sensing touch electrode (e.g., non-sensing TE) during a second touch sensing mode period Tt2 is shown.

[0362] Reference Figures 19 to 21 , according to an embodiment of the present disclosure, the signal output structure of the touch driving circuit 160 may include: a first selector 1910 configured to output one of an external auxiliary driving signal ADS_EX and an internal auxiliary driving signal ADS_IN as the auxiliary driving signal ADS; and a second selector 1920 configured to output one of the auxiliary driving signal ADS and a second touch driving signal TDS2 to a signal output node NS. The first selector 1910 may be configured to receive the external auxiliary driving signal ADS_EX and the internal auxiliary driving signal ADS_IN, and output one of the external auxiliary driving signal ADS_EX and the internal auxiliary driving signal ADS_IN as the auxiliary driving signal ADS. The signal output node NS may be electrically connected to two or more of the plurality of first touch electrodes TE1 or two or more of the plurality of second touch electrodes TE2.

[0363] That is, the second selector 1920 may be configured to output one of the auxiliary driving signal ADS and the second touch driving signal TDS2 to two or more of the plurality of first touch electrodes TE1 or two or more of the plurality of second touch electrodes TE2.

[0364] Reference Figures 19 to 21 , the first selector 1910 may select and output one of the internal auxiliary driving signal ADS_IN generated within the touch driving circuit 160 and the external auxiliary driving signal ADS_EX input from outside the touch driving circuit 160 as the auxiliary driving signal ADS based on an auxiliary driving control signal ADCS.

[0365] The second selector 1920 may be configured to receive the auxiliary driving signal ADS and the second touch driving signal TDS2, and output one of the auxiliary driving signal ADS and the second touch driving signal TDS2 to the signal output node NS.

[0366] Reference Figures 19 to 21, the second selector 1920 can select one of the auxiliary drive signal ADS output from the first selector 1910 and the second touch drive signal TDS2 output from the sensing unit SU and output it to the signal output node NS.

[0367] Reference Figure 19 , during the second touch sensing mode period Tt2, if the second selector 1920 selects the second touch drive signal TDS2 output from the sensing unit SU and outputs the second touch drive signal TDS2 to the signal output node NS, the second touch drive signal TDS2 output from the second selector 1920 can be provided to the sensing binding group electrically connected to the signal output node NS. Here, the sensing touch electrodes included in the sensing binding group can be electrically connected to each other through the binding circuit 1550.

[0368] During the second touch sensing mode period Tt2, since self-sensing is performed, the second touch drive signal TDS2 input to the first input node IN1 of the charge amplifier CAMP in the sensing unit SU can be output to the second input node IN2. The second touch drive signal TDS2 output to the second input node IN2 of the charge amplifier CAMP can be supplied to the sensing touch electrodes included in the sensing binding group and electrically connected to each other through the second selector 1920.

[0369] Reference Figure 20 and Figure 21 , during the second touch sensing mode period Tt2, if the second selector 1920 selects the auxiliary drive signal ADS output from the first selector 1910 and outputs it to the signal output node NS, the auxiliary drive signal ADS output from the second selector 1920 can be provided to the non-sensing binding group electrically connected to the signal output node NS. Here, the non-sensing touch electrodes included in the non-sensing binding group can be electrically connected to each other through the binding circuit 1550.

[0370] Reference Figure 20 , if the input auxiliary drive control signal ADCS has a sixth level voltage LV6 that defines external drive, the first selector 1910 can output the external auxiliary drive signal ADS_EX among the internal auxiliary drive signal ADS_IN and the external auxiliary drive signal ADS_EX as the auxiliary drive signal ADS.

[0371] Reference Figure 21 , if the input auxiliary drive control signal ADCS has a fifth level voltage LV5 that defines internal drive, the first selector 1910 can output the internal auxiliary drive signal ADS_IN among the internal auxiliary drive signal ADS_IN and the external auxiliary drive signal ADS_EX as the auxiliary drive signal ADS.

[0372] Reference Figures 19 to 21 ,Each of the first selector 1910 and the second selector 1920 may be configured as a switching circuit or a multiplexer, but is not limited thereto.

[0373] As described above, the touch display device 100 according to an embodiment of the present disclosure may perform self-sensing during the second touch sensing mode period Tt2, and may effectively and quickly sense non-contact touch by expanding the sensing area through the binding process via the plurality of first touch electrodes TE1 and the plurality of second touch electrodes TE2, and may prevent the formation of unnecessary parasitic capacitance through auxiliary driving, thereby improving the sensing performance.

[0374] Hereinafter, reference will be made to Figures 22 to 27 Describe various examples of the operation of the touch display device 100 according to an embodiment of the present disclosure during the second touch sensing mode period Tt2.

[0375] Figures 22 to 27 An example of the driving operation of the touch display device 100 according to an exemplary embodiment of the present disclosure is shown. However, in Figures 22 to 27 , the plurality of touch electrodes TE may be bound as in Figure 12 . In the following description, reference is also made to Figure 15 .

[0376] Reference Figures 22 to 27 , the plurality of first touch electrodes TE1 may include N first touch electrodes, such as six first touch electrodes TE1_1 to TE1_6, and the plurality of second touch electrodes TE2 may include M second touch electrodes, such as nine second touch electrodes TE2_1 to TE2_9. N may be a natural number greater than or equal to 2, and M may be a natural number greater than or equal to 2.

[0377] Reference Figures 22 to 27 , the touch display device 100 according to an embodiment of the present disclosure may perform a binding process on the N first touch electrodes TE1_1 to TE1_6 and the M second touch electrodes TE2_1 to TE2_9 using the binding circuit 1550 during the second touch sensing mode period Tt2.

[0378] Reference Figures 22 to 27 , the binding circuit 1550 in the touch driving circuit 160 may perform a binding process to bind every P of the N first touch electrodes TE1_1 to TE1_6 to form H horizontal binding groups BG1_1 and BG1_2, and bind every Q of the M second touch electrodes TE2_1 to TE2_9 to form V vertical binding groups BG2_1, BG2_2, and BG2_3.

[0379] N can be a natural number greater than or equal to 2, M can be a natural number greater than or equal to 2, P can be a natural number greater than or equal to 2, Q can be a natural number greater than or equal to 2, H can be N / P, and V can be M / Q. In the following, the case where N is 6, M is 9, P is 3, Q is 3, H = 2, and V = 3 (i.e., N = 6, M = 9, P = 3, Q = 3, H = 2, V = 3) is illustrated.

[0380] By performing a binding process during the second touch sensing mode period Tt2 to expand a sensing area, a self-sensing method can be used to efficiently and quickly sense non-contact touches (e.g., hover touches) during the second touch sensing mode period Tt2.

[0381] Reference Figures 22 to 27 , during the second touch sensing mode period Tt2, when performing self-sensing (e.g., touch driving and sensing processing) on at least one of the two horizontal binding groups BG1_1 and BG1_2 and the three vertical binding groups BG2_1, BG2_2, and BG2_3 (e.g., a sensing binding group), auxiliary driving can be performed on at least one remaining binding group (e.g., a non-sensing binding group).

[0382] By performing auxiliary driving during the second touch sensing mode period Tt2, when sensing non-contact touches (e.g., hover touches) in the self-sensing method, unnecessary parasitic capacitance can be prevented from forming, thereby improving sensing performance.

[0383] The touch driving circuit 160 of the touch display device 100 according to an exemplary embodiment of the present disclosure may include a binding circuit 1550 that performs a binding process during the second touch sensing mode period Tt2.

[0384] The binding circuit 1550 may control the electrical connections between the six first touch electrodes TE1_1 to TE1_6 and the electrical connections between the nine second touch electrodes TE2_1 to TE2_9.

[0385] The binding circuit 1550 may include a first binding circuit 2210 for controlling the electrical connections between the six first touch electrodes TE1_1 to TE1_6 and a second binding circuit 2220 for controlling the electrical connections between the nine second touch electrodes TE2_1 to TE2_9.

[0386] The first binding circuit 2210 may electrically separate the six first touch electrodes TE1_1 to TE1_6 during the first touch sensing mode period Tt1, and may bind the six first touch electrodes TE1_1 to TE1_6 in groups of three to form two horizontal binding groups BG1_1 and BG1_2 during the second touch sensing mode period Tt2, but is not limited thereto.

[0387] The second binding circuit 2220 may electrically separate the nine second touch electrodes TE2_1 to TE2_9 during the first touch sensing mode period Tt1, and may bind the nine second touch electrodes TE2_1 to TE2_9 in groups of three to form three vertical binding groups BG2_1, BG2_2, and BG2_3 during the second touch sensing mode period Tt2, but is not limited thereto.

[0388] During the second touch sensing mode period Tt2, the first binding circuit 2210 may apply the second touch drive signal TDS2 or the auxiliary drive signal ADS to each of two horizontal binding groups BG1_1 and BG1_2 formed by six first touch electrodes TE1_1 to TE1_6.

[0389] During the second touch sensing mode period Tt2, the second binding circuit 2220 may apply the second touch drive signal TDS2 or the auxiliary drive signal ADS to each of three vertical binding groups BG2_1, BG2_2, and BG2_3 formed by nine second touch electrodes TE2_1 to TE2_9.

[0390] During the second touch sensing mode period Tt2, the second touch drive signal TDS2 may be applied to at least one of five binding groups BG1_1, BG1_2, BG2_1, BG2_2, and BG2_3 including two horizontal binding groups BG1_1 and BG1_2 and three vertical binding groups BG2_1, BG2_2, and BG2_3, and the auxiliary drive signal ADS may be applied to the remaining binding groups.

[0391] Reference Figures 22 to 27 , the first binding circuit 2210 may include six horizontal switches ST1 to ST6 respectively connected to six first touch electrodes TE1_1 to TE1_6 and five (i.e., N - 1 = 5) horizontal binding switches BT1 to BT5 connected between adjacent two of the six first touch electrodes TE1_1 to TE1_6.

[0392] The six horizontal switches ST1 to ST6 may control the connection between the six first touch electrodes TE1_1 to TE1_6 and six horizontal signal output nodes NS1.

[0393] For example, among five horizontal binding switches BT1 to BT5, the first horizontal binding switch BT1 and the second horizontal binding switch BT2 can be turned on, so that three first touch electrodes TE1_1, TE1_2, and TE1_3 can be bound (i.e., electrically connected) to form a first horizontal binding group BG1_1. Among five horizontal binding switches BT1 to BT5, the fourth horizontal binding switch BT4 and the fifth horizontal binding switch BT5 can be turned on, so that another three first touch electrodes TE1_4, TE1_5, and TE1_6 can be bound (i.e., electrically connected) to form a second horizontal binding group BG1_2.

[0394] In this case, if the third horizontal binding switch BT3 is turned off, the first horizontal binding group BG1_1 and the second horizontal binding group BG1_2 can be electrically separated.

[0395] In this case, it is necessary to apply a separate second touch driving signal TDS2 or a separate auxiliary driving signal ADS to each of the first horizontal binding group BG1_1 and the second horizontal binding group BG1_2.

[0396] Therefore, one of the first horizontal switch ST1 to the third horizontal switch ST3 among the six horizontal switches ST1 to ST6 can be turned on and the remaining two of the first horizontal switch ST1 to the third horizontal switch ST3 can be turned off, and the second touch driving signal TDS2 or the auxiliary driving signal ADS can be applied to the first horizontal binding group BG1_1 through the turned-on one horizontal switch. Additionally, among the six horizontal switches ST1 to ST6, one of the fourth horizontal switch ST4 to the sixth horizontal switch ST6 can be turned on and the remaining two can be turned off, and the second touch driving signal TDS2 or the auxiliary driving signal ADS can be applied to the first horizontal binding group BG1_1 through the turned-on one horizontal switch.

[0397] As another example, all five horizontal binding switches BT1 to BT5 can be turned on, and all six first touch electrodes TE1_1 to TE1_6 can be bound (i.e., electrically connected) so that an extended horizontal binding group including both the first horizontal binding group BG1_1 and the second horizontal binding group BG1_2 can be formed.

[0398] In this case, it is necessary to apply a separate second touch driving signal TDS2 or a separate auxiliary driving signal ADS to the extended horizontal binding group.

[0399] For this purpose, one of the six horizontal switches ST1 to ST6 can be turned on and the remaining five can be turned off, so that the second touch driving signal TDS2 or the auxiliary driving signal ADS can be applied to the extended horizontal binding group through the turned-on one horizontal switch.

[0400] ReferenceFigures 22 to 27 The second binding circuit 2220 may include nine vertical switches SR1 to SR9 respectively connected to nine second touch electrodes TE2_1 to TE2_9 and eight (i.e., M - 1 = 8) vertical binding switches BR1 to BR8 connected between two adjacent second touch electrodes among the nine second touch electrodes TE2_1 to TE2_9.

[0401] The nine vertical switches SR1 to SR9 may control the connection between the nine second touch electrodes TE2_1 to TE2_9 and nine vertical signal output nodes NS2.

[0402] For example, the first vertical binding switch BR1 and the second vertical binding switch BR2 among the nine vertical switches SR1 to SR9 may bind or electrically connect three second touch electrodes TE2_1, TE2_2, and TE2_3, the fourth vertical binding switch BR4 and the fifth vertical binding switch BR5 among the nine vertical switches SR1 to SR9 may bind or electrically connect three second touch electrodes TE_2_4, TE2_5, and TE2_6, and the seventh vertical binding switch BR7 and the eighth vertical binding switch BR8 among the nine vertical switches SR1 to SR9 may bind or electrically connect three second touch electrodes TE2_7, TE2_8, and TE2_9, but is not limited thereto.

[0403] For example, among the eight vertical binding switches BR1 to BR8, the first vertical binding switch BR1 and the second vertical binding switch BR2 may be turned on, and three second touch electrodes TE2_1, TE2_2, and TE2_3 may be bound or electrically connected to form a first vertical binding group BG2_1. Among the eight vertical binding switches BR1 to BR8, the fourth vertical binding switch BR4 and the fifth vertical binding switch BR5 may be turned on, and another three second touch electrodes TE2_4, TE2_5, and TE2_6 may be bound or electrically connected to form a second vertical binding group BG2_2. Among the eight vertical binding switches BR1 to BR8, the seventh vertical binding switch BR7 and the eighth vertical binding switch BR8 may be turned on, and the other three second touch electrodes TE2_7, TE2_8, and TE2_9 may be bound or electrically connected to form a third vertical binding group BG2_3.

[0404] In this case, if the third vertical binding switch BT3 and the sixth vertical binding switch BT6 can be turned off, the first vertical binding group BG2_1, the second vertical binding group BG2_2, and the third vertical binding group BG2_3 may be electrically separated.

[0405] In this case, it may be necessary to apply a separate second touch drive signal TDS2 or a separate auxiliary drive signal ADS to each of the first vertical binding group BG2_1, the second vertical binding group BG2_2, and the third vertical binding group BG2_3. As an example, nine vertical switches SR1 to SR9 may be configured to apply the second touch drive signal TDS2 or the auxiliary drive signal ADS to the first vertical binding group BG2_1, the second vertical binding group BG2_2, or the third vertical binding group BG_3.

[0406] For this purpose, among the nine vertical switches SR1 to SR9, one of the first vertical switch SR1 to the third vertical switch SR3 may be turned on and the remaining two may be turned off, so that the second touch drive signal TDS2 or the auxiliary drive signal ADS can be applied to the first vertical binding group BG2_1 through the turned-on vertical switch. In addition, among the nine vertical switches SR1 to SR9, one of the fourth vertical switch SR4 to the sixth vertical switch SR6 may be turned on and the remaining two may be turned off, so that the second touch drive signal TDS2 or the auxiliary drive signal ADS can be applied to the second vertical binding group BG2_2 through the turned-on vertical switch. In addition, among the nine vertical switches SR1 to SR9, one of the seventh vertical switch SR7 to the ninth vertical switch SR9 may be turned on and the remaining two may be turned off, and the second touch drive signal TDS2 or the auxiliary drive signal ADS can be applied to the third vertical binding group BG2_3 through the turned-on vertical switch.

[0407] As another example, all eight vertical binding switches BR1 to BR8 may be turned on, and all nine second touch electrodes TE2_1 to TE2_9 may be bound or electrically connected, so that an extended vertical binding group including all of the first vertical binding group BG2_1, the second vertical binding group BG2_2, and the third vertical binding group BG2_3 can be configured.

[0408] In this case, it is necessary to apply a separate second touch drive signal TDS2 or a separate auxiliary drive signal ADS to the extended vertical binding group.

[0409] For this purpose, one of the nine vertical switches SR1 to SR9 may be turned on and the remaining five may be turned off, and the second touch drive signal TDS2 or the auxiliary drive signal ADS can be applied to the extended vertical binding group through the turned-on vertical switch.

[0410] Reference Figures 22 to 27, among five binding groups BG1_1, BG1_2, BG2_1, BG2_2, and BG2_3 including two horizontal binding groups BG1_1 and BG1_2 and three vertical binding groups BG2_1, BG2_2, and BG2_3, sensing can be performed on at least one binding group (i.e., the sensing binding group).

[0411] In addition, among the five binding groups BG1_1, BG1_2, BG2_1, BG2_2, and BG2_3, auxiliary driving can be performed on the remaining binding groups other than the binding group on which sensing is performed.

[0412] During the second touch sensing mode period Tt2, sensing of one binding group may include operations of binding two or more touch electrodes included in one binding group, connecting two or more touch electrodes included in one binding group to a second input node N2 of a charge amplifier CAMP included in one sensing unit SU together, applying a second touch driving signal TDS2 input to a first input node IN1 of a charge amplifier CAMP to two or more touch electrodes included in one binding group through a second input node IN2 together, and an operation of a charge amplifier CAMP detecting a signal using two or more touch electrodes included in one binding group (e.g., a sensing operation).

[0413] During the second touch sensing mode period Tt2, auxiliary driving for one binding group may include an operation of binding two or more touch electrodes included in one binding group, and an operation of applying an auxiliary driving signal ADS to two or more touch electrodes included in one binding group together.

[0414] Hereinafter, various examples of performing binding processing and auxiliary driving when performing touch driving in a self-sensing manner will be described in more detail.

[0415] Reference Figure 22 , sensing can be performed on each of the three vertical binding groups BG2_1, BG2_2, and BG2_3, and auxiliary driving can be performed on an extended horizontal binding group including two horizontal binding groups BG1_1 and BG1_2.

[0416] Reference Figure 23 , sensing can be performed on each of the two horizontal binding groups BG1_1 and BG1_2, and auxiliary driving can be performed on an extended vertical binding group including three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0417] Reference Figure 24, sensing can be performed on each of the three vertical binding groups BG2_1, BG2_2, and BG2_3, sensing can be performed on the second horizontal binding group BG1_2 of the two horizontal binding groups BG1_1 and BG1_2, and auxiliary driving can be performed on the first horizontal binding group BG1_1 of the two horizontal binding groups BG1_1 and BG1_2.

[0418] Reference Figure 25 , sensing can be performed on each of the two horizontal binding groups BG1_1 and BG1_2, sensing can be performed on the first vertical binding group BG2_1 of the three vertical binding groups BG2_1, BG2_2, and BG2_3, and auxiliary driving can be performed on the second vertical binding group BG2_2 and the third vertical binding group BG2_3 of the three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0419] Reference Figure 26 , sensing can be performed on the second horizontal binding group BG1_2 of the two horizontal binding groups BG1_1 and BG1_2, auxiliary driving can be performed on the first horizontal binding group BG1_1 of the two horizontal binding groups BG1_1 and BG1_2, and auxiliary driving can be performed on the extended vertical binding group including the three vertical binding groups BG2_1, BG2_2, and BG2_3.

[0420] Reference Figure 27 , sensing can be performed on the first vertical binding group BG2_1 of the three vertical binding groups BG2_1, BG2_2, and BG2_3, auxiliary driving can be performed on the second vertical binding group BG2_2 and the third vertical binding group BG2_3 of the three vertical binding groups BG2_1, BG2_2, and BG2_3, and auxiliary driving can be performed on the extended horizontal binding group including the two horizontal binding groups BG1_1 and BG1_2.

[0421] The above-described embodiments of the present disclosure will be briefly described below.

[0422] A touch display device according to an embodiment of the present disclosure may include a touch sensor and a touch driving circuit. The touch sensor includes a plurality of first touch electrodes and a plurality of second touch electrodes. The touch driving circuit is configured to provide a touch driving signal to the touch sensor during a touch sensing mode period.

[0423] The touch sensing mode period may include a first touch sensing mode period and a second touch sensing mode period. In the first touch sensing mode period, a first touch driving signal is applied to the touch sensor as the touch driving signal. In the second touch sensing mode period, a second touch driving signal is applied to the touch sensor as the touch driving signal.

[0424] During the first touch sensing mode period, the first touch driving signal may include a first pulse having a first amplitude, and during the second touch sensing mode period, the second touch driving signal may include a second pulse having a second amplitude.

[0425] The second amplitude may be different from the first amplitude, or the number of second pulses may be different from the number of first pulses. For example, the second amplitude may be greater than the first amplitude, or the number of second pulses may be greater than the number of first pulses.

[0426] During the second touch sensing mode period, the touch driving circuit may provide the second touch driving signal to a part of the touch sensor and provide an auxiliary driving signal to another part of the touch sensor.

[0427] The touch driving circuit may output an externally input external auxiliary driving signal as the auxiliary driving signal. In this case, the external auxiliary driving signal and the second touch driving signal may have the same phase.

[0428] The touch driving circuit may generate an internal auxiliary driving signal based on a reference driving signal input from the outside and output the internal auxiliary driving signal as the auxiliary driving signal. In this case, the internal auxiliary driving signal and the second touch driving signal may have the same phase.

[0429] During the first touch sensing mode period, a plurality of first touch electrodes may be electrically separated and a plurality of second touch electrodes may be electrically separated.

[0430] During the second touch sensing mode period, two or more of the plurality of first touch electrodes may be electrically connected to each other, or two or more of the plurality of second touch electrodes may be electrically connected to each other.

[0431] During the first touch sensing mode period, the first touch driving signal may be applied to at least one of the plurality of first touch electrodes or at least one of the plurality of second touch electrodes.

[0432] During the second touch sensing mode period, the second touch driving signal may be commonly applied to two or more of the plurality of first touch electrodes, or may be commonly applied to two or more of the plurality of second touch electrodes.

[0433] The first touch sensing mode period may be a contact mode period for sensing a contact touch that has touched the screen, and the second touch sensing mode period may be a hover mode period for sensing a non-contact touch that has not touched the screen.

[0434] The second touch sensing mode period may include a first sub-sensing period and a second sub-sensing period. In the first sub-sensing period, a second touch driving signal is simultaneously applied to two or more first touch electrodes that are electrically connected to each other among the plurality of first touch electrodes. In the second sub-sensing period, the second touch driving signal is simultaneously applied to two or more second touch electrodes that are electrically connected to each other among the plurality of second touch electrodes.

[0435] During the first sub-sensing period, the touch driving circuit may provide an auxiliary driving signal to the remaining first touch electrodes other than the two or more first touch electrodes or the plurality of second touch electrodes.

[0436] During the second sub-sensing period, the touch driving circuit may provide an auxiliary driving signal to the remaining second touch electrodes other than the two or more second touch electrodes or the plurality of first touch electrodes.

[0437] The operation period of the touch display device may include a display mode period for displaying an image and a touch sensing mode period including a first touch sensing mode period and a second touch sensing mode period.

[0438] The display mode period, the first touch sensing mode period, and the second touch sensing mode period may be defined by a first mode control signal and a second mode control signal having different signal waveforms.

[0439] The first mode control signal may include a first signal section having a first level voltage and a second signal section having a second level voltage different from the first level voltage.

[0440] The second mode control signal may include a third signal section having a third level voltage and a fourth signal section having a fourth level voltage different from the third level voltage.

[0441] During the display mode period, the first mode control signal may have the second level voltage, and the second mode control signal may have the third level voltage.

[0442] During the first touch sensing mode period, the first mode control signal may have the first level voltage, and the second mode control signal may have the third level voltage.

[0443] During the second touch sensing mode period, the first mode control signal may have the first level voltage, and the second mode control signal may have the fourth level voltage.

[0444] The touch display device according to an embodiment of the present disclosure may further include a touch controller for receiving the first mode control signal and outputting a reference driving signal and the second mode control signal.

[0445] The touch driving circuit can receive a reference driving signal and a second mode control signal, and can output a touch driving signal and an auxiliary driving signal according to the reference driving signal and the second mode control signal.

[0446] The touch display device according to an embodiment of the present disclosure may further include a display controller configured to output a first mode control signal to the touch controller.

[0447] The first mode control signal may be a vertical synchronization signal for defining a display frame time, and the second mode control signal may be a hover enable signal for enabling a hover mode.

[0448] The touch display device according to an embodiment of the present disclosure may further include a touch power supply circuit configured to output an external auxiliary driving signal.

[0449] The touch driving circuit may further receive an auxiliary driving control signal from the touch controller.

[0450] The touch driving circuit may output the external auxiliary driving signal as the auxiliary driving signal according to the auxiliary driving control signal, or generate and output an internal auxiliary driving signal as the auxiliary driving signal based on the reference driving signal.

[0451] During a second touch sensing mode period, the auxiliary driving control signal may include at least one of a fifth signal section having a fifth level voltage and a sixth signal section having a sixth level voltage different from the fifth level voltage.

[0452] During the second touch sensing mode period, when the auxiliary driving control signal is in the fifth signal section, the auxiliary driving signal may be an internal auxiliary driving signal.

[0453] During the second touch sensing mode period, when the auxiliary driving control signal is in the sixth signal section, the auxiliary driving signal may be an external auxiliary driving signal.

[0454] The touch driving circuit may include: a first selector configured to output one of an internal auxiliary driving signal and an external auxiliary driving signal as the auxiliary driving signal; and a second selector configured to output one of the auxiliary driving signal and a second touch driving signal to two or more of the plurality of first touch electrodes or two or more of the plurality of second touch electrodes.

[0455] The plurality of first touch electrodes may include N first touch electrodes, and the plurality of second touch electrodes may include M second touch electrodes. Here, N may be a natural number greater than or equal to 2, and M may be a natural number greater than or equal to 2.

[0456] The touch display device according to an embodiment of the present disclosure may further include: a first binding circuit configured to bind N first touch electrodes in units of P during a second touch sensing mode period to form H horizontal binding groups; and a second binding circuit configured to bind M second touch electrodes in units of Q during the second touch sensing mode period to form V vertical binding groups.

[0457] P may be a natural number greater than or equal to 2, Q may be a natural number greater than or equal to 2, H may be N / P, and V may be M / Q.

[0458] The first binding circuit and the second binding circuit may be included in the touch driving circuit.

[0459] During the second touch sensing mode period, a second touch driving signal may be applied to at least one of the (H + V) binding groups including H horizontal binding groups and V vertical binding groups, and an auxiliary driving signal may be applied to the remaining binding groups.

[0460] The first binding circuit may include N horizontal switches respectively connected to the N first touch electrodes, and (N - 1) horizontal binding switches connected between two adjacent first touch electrodes among the N first touch electrodes.

[0461] The second binding circuit may include M vertical switches respectively connected to the M second touch electrodes, and (M - 1) vertical binding switches connected between two adjacent second touch electrodes among the M second touch electrodes.

[0462] The touch driving circuit according to an embodiment of the present disclosure may include: a first touch driving signal output unit configured to provide a first touch driving signal to each of the plurality of first touch electrodes during a first touch sensing mode period; a sensing unit configured to provide a second touch driving signal to two or more of the plurality of touch electrodes during a second touch sensing mode period; and an auxiliary driving signal output unit configured to provide an auxiliary driving signal to two or more of the plurality of touch electrodes to which the second touch driving signal is not applied during the second touch sensing mode period.

[0463] The touch driving circuit according to an embodiment of the present disclosure may further include a binding circuit configured to control electrical connections between the plurality of first touch electrodes and electrical connections between the plurality of second touch electrodes.

[0464] The binding circuit may electrically isolate the plurality of first touch electrodes and electrically isolate the plurality of second touch electrodes during the first touch sensing mode.

[0465] During the second touch sensing mode period, the binding circuit may electrically connect two or more of the plurality of first touch electrodes to which a second touch driving signal is simultaneously applied, or may electrically connect two or more of the plurality of second touch electrodes to which a second touch driving signal is simultaneously applied.

[0466] A touch display device according to an embodiment of the present disclosure may include a touch sensor and a touch driving circuit. The touch sensor includes a plurality of first touch electrodes and a plurality of second touch electrodes. The touch driving circuit is configured to provide a touch driving signal to the touch sensor during a touch sensing mode period.

[0467] The touch sensing mode period may include a first touch sensing mode period and a second touch sensing mode period. In the first touch sensing mode period, a first touch driving signal having a first amplitude is applied to the touch sensor as a touch driving signal. In the second touch sensing mode period, a second touch driving signal having a second amplitude greater than the first amplitude is applied to the touch sensor as a touch driving signal.

[0468] During the second touch sensing mode period, the touch driving circuit may provide a second touch driving signal to a part of the touch sensor and provide an auxiliary driving signal to another part of the touch sensor.

[0469] According to an exemplary embodiment of the present disclosure as described above, a touch display device and a touch driving circuit capable of supporting various touch sensing modes can be provided.

[0470] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of efficiently sensing contact touch and non-contact touch can be provided.

[0471] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of effectively and quickly sensing non-contact touch can be provided.

[0472] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of efficiently supporting a display mode, a contact touch sensing mode, and a hover touch sensing mode can be provided.

[0473] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of preventing unwanted parasitic capacitance from occurring when sensing non-contact touch can be provided.

[0474] According to an exemplary embodiment of the present disclosure, a touch display device and a touch driving circuit capable of efficiently driving non-sensing touch electrodes (e.g., auxiliary driving) when sensing non-contact touch can be provided.

[0475] According to an exemplary embodiment of the present disclosure, display driving, contact touch sensing, and hover touch sensing can be efficiently performed in terms of driving time, thereby achieving low-power driving.

[0476] The above description and the drawings provide examples of the technical concept of the present disclosure for illustrative purposes only. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art without departing from the spirit and scope of the present disclosure. Additionally, the disclosed embodiments are intended to illustrate the scope of the technical concept of the present disclosure. Therefore, the scope of the present disclosure is not limited to the illustrated embodiments.

[0477] Cross-reference to related applications

[0478] This application claims the priority and benefit of Korean Patent Application No. 10-2023-0191655, filed on December 26, 2023, which is incorporated herein by reference in its entirety for all purposes as if fully set forth herein.

Claims

1. A touch display device, comprising: A touch sensor, the touch sensor comprising a plurality of first touch electrodes and a plurality of second touch electrodes; as well as a touch driving circuit configured to provide a touch driving signal to the touch sensor during a touch sensing mode period, The touch sensing mode period includes: a first touch sensing mode period, in which a first touch driving signal is applied to the touch sensor as the touch driving signal, and a second touch sensing mode period, in which a second touch driving signal is applied to the touch sensor as the touch driving signal, During the second touch sensing mode period, the touch driving circuit provides the second touch driving signal to a portion of the touch sensor and provides an auxiliary driving signal to another portion of the touch sensor.

2. The touch display device according to claim 1, wherein: The touch driving circuit outputs an external auxiliary driving signal input from the outside as the auxiliary driving signal, and the external auxiliary driving signal and the second touch driving signal have the same phase.

3. The touch display device according to claim 1, wherein: The touch driving circuit generates an internal auxiliary driving signal based on a reference driving signal input from the outside and outputs the internal auxiliary driving signal as the auxiliary driving signal, and the internal auxiliary driving signal and the second touch driving signal have the same phase.

4. The touch display device according to claim 1, wherein: During the first touch sensing mode period, the plurality of first touch electrodes are electrically separated and the plurality of second touch electrodes are electrically separated, During the second touch sensing mode period, two or more first touch electrodes among the plurality of first touch electrodes are electrically connected to each other, or two or more second touch electrodes among the plurality of second touch electrodes are electrically connected to each other.

5. The touch display device according to claim 1, wherein: During the first touch sensing mode period, applying the first touch driving signal to at least one first touch electrode among the plurality of first touch electrodes or at least one second touch electrode among the plurality of second touch electrodes, During the second touch sensing mode period, the second touch drive signal is commonly applied to two or more first touch electrodes among the plurality of first touch electrodes, or is commonly applied to two or more second touch electrodes among the plurality of second touch electrodes.

6. The touch display device according to claim 1, wherein: the first touch sensing mode period is a contact mode period for sensing a contact touch that has contacted a screen, and the second touch sensing mode period is a hovering mode period for sensing a non-contact touch that has not contacted the screen, wherein the first touch drive signal includes a first pulse having a first amplitude during the first touch sensing mode period, and the second touch drive signal includes a second pulse having a second amplitude during the second touch sensing mode period, The second amplitude is different from the first amplitude, or the number of the second pulses is different from the number of the first pulses.

7. The touch display device according to claim 1, wherein: The second touch sensing mode period includes: a first sub-sensing period in which the second touch driving signal is simultaneously applied to two or more first touch electrodes electrically connected to each other among the plurality of first touch electrodes; and a second sub-sensing period, in which the second touch driving signal is simultaneously applied to two or more second touch electrodes electrically connected to each other among the plurality of second touch electrodes, During the first sub-sensing period, the touch driving circuit provides the auxiliary driving signal to the remaining first touch electrodes except the two or more first touch electrodes and / or the plurality of second touch electrodes, During the second sub-sensing period, the touch driving circuit provides the auxiliary driving signal to the remaining second touch electrodes except the two or more second touch electrodes and / or the plurality of first touch electrodes.

8. The touch display device according to claim 1, wherein: The operation period of the touch display device includes: A display mode period, the display mode period being used to display an image; and a touch sensing mode period, the touch sensing mode period including the first touch sensing mode period and the second touch sensing mode period, The display mode period, the first touch sensing mode period and the second touch sensing mode period are defined by a first mode control signal and a second mode control signal having different signal waveforms.

9. The touch display device according to claim 8, wherein: The first mode control signal includes a first signal section having a first level voltage and a second signal section having a second level voltage different from the first level voltage, The second mode control signal includes a third signal segment having a third level voltage and a fourth signal segment having a fourth level voltage different from the third level voltage. wherein, during the display mode period, the first mode control signal has the second level voltage, and the second mode control signal has the third level voltage, wherein, during the first touch sensing mode period, the first mode control signal has the first level voltage, and the second mode control signal has the third level voltage, During the second touch sensing mode period, the first mode control signal has the first level voltage, and the second mode control signal has the fourth level voltage.

10. The touch display device according to claim 8, further comprising a touch controller configured to receive the first mode control signal and output a reference drive signal and the second mode control signal, in, The touch driving circuit receives the reference driving signal and the second mode control signal, and outputs the touch driving signal and the auxiliary driving signal according to the reference driving signal and the second mode control signal.

11. The touch display device according to claim 10, further comprising a display controller configured to output the first mode control signal to the touch controller, in, The first mode control signal is a vertical synchronization signal for defining a display frame time, and the second mode control signal is a hover enable signal for enabling a hover mode.

12. The touch display device according to claim 10, further comprising a touch power circuit configured to output an external auxiliary driving signal, in, The touch drive circuit also receives an auxiliary drive control signal from the touch controller, and outputs the external auxiliary drive signal as the auxiliary drive signal according to the auxiliary drive control signal, or generates and outputs an internal auxiliary drive signal as the auxiliary drive signal based on the reference drive signal.

13. The touch display device according to claim 12, wherein: During the second touch sensing mode period, the auxiliary driving control signal includes at least one of a fifth signal section having a fifth level voltage and a sixth signal section having a sixth level voltage different from the fifth level voltage.

14. The touch display device according to claim 12, wherein: The touch driving circuit comprises: a first selector that outputs one of the internal auxiliary driving signal and the external auxiliary driving signal as the auxiliary driving signal; and A second selector outputs one of the auxiliary driving signal and the second touch driving signal to two or more first touch electrodes among the plurality of first touch electrodes or two or more second touch electrodes among the plurality of second touch electrodes.

15. The touch display device according to claim 1, wherein: The plurality of first touch electrodes include N first touch electrodes, and the plurality of second touch electrodes include M second touch electrodes, wherein N is a natural number greater than or equal to 2, and M is a natural number greater than or equal to 2, Wherein, the touch drive circuit further includes: a first binding circuit configured to bind the N first touch electrodes in units of P and form H horizontal binding groups during the second touch sensing mode period; and a second binding circuit configured to bind the M second touch electrodes in units of Q and form V vertical binding groups during the second touch sensing mode period; Wherein, P is a natural number greater than or equal to 2, Q is a natural number greater than or equal to 2, H is N / P, and V is M / Q.

16. The touch display device according to claim 15, wherein: During the second touch sensing mode period, the second touch driving signal is applied to at least one bonding group among H+V bonding groups including the H horizontal bonding groups and the V vertical bonding groups, and the auxiliary driving signal is applied to the remaining bonding groups.

17. The touch display device according to claim 15, wherein: The first binding circuit includes: N horizontal switches each connected to the N first touch electrodes; and N-1 horizontal binding switches connected between two adjacent first touch electrodes among the N first touch electrodes, Wherein, the second binding circuit includes: M vertical switches each connected to the M second touch electrodes; and M-1 vertical binding switches are connected between two adjacent second touch electrodes among the M second touch electrodes.

18. A touch driving circuit for driving a plurality of touch electrodes including a plurality of first touch electrodes and a plurality of second touch electrodes, the touch driving circuit comprising: a first touch driving signal output unit configured to provide a first touch driving signal to each of the plurality of first touch electrodes during a first touch sensing mode period; a sensing unit configured to provide a second touch driving signal to two or more first touch electrodes among the plurality of first touch electrodes or two or more second touch electrodes among the plurality of second touch electrodes during a second touch sensing mode period; as well as An auxiliary driving signal output unit configured to provide an auxiliary driving signal to two or more touch electrodes to which the second touch driving signal is not applied among the plurality of touch electrodes during the second touch sensing mode period.

19. The touch driving circuit according to claim 18, further comprising a binding circuit for controlling electrical connections between the plurality of first touch electrodes and electrical connections between the plurality of second touch electrodes, in, During the second touch sensing mode period, the binding circuit electrically connects two or more first touch electrodes among the plurality of first touch electrodes to which the second touch drive signal is simultaneously applied, or electrically connects two or more second touch electrodes among the plurality of second touch electrodes to which the second touch drive signal is simultaneously applied.

20. A touch display device, comprising: A touch sensor, the touch sensor comprising a plurality of first touch electrodes and a plurality of second touch electrodes; as well as a touch driving circuit configured to provide a touch driving signal to the touch sensor during a touch sensing mode period, The touch sensing mode period includes: a first touch sensing mode period, in which a first touch driving signal having a first amplitude is applied to the touch sensor as the touch driving signal, and a second touch sensing mode period, in which a second touch driving signal having a second amplitude greater than the first amplitude is applied to the touch sensor as the touch driving signal, During the second touch sensing mode period, the touch driving circuit provides the second touch driving signal to a portion of the touch sensor and provides an auxiliary driving signal to another portion of the touch sensor.

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