Touch display device and driving method for touch display device

Abstract

The invention relates to a touch display device and a driving method for the touch display device. The touch circuitry supplies an uplink signal to the touch screen panel. A first uplink signal as a first waveform signal is supplied to the first touch electrode. A second uplink signal as a second waveform signal is supplied to the second touch electrode. And the influence of an uplink signal on display driving is prevented.

Description

Technical Field

[0001] Embodiments relate to a touch display device and a driving method for the touch display device, and more particularly, for example but not limited to, to a touch display device in which pen touch driving and display driving are simultaneously performed and a driving method for the touch display device. Background Art

[0002] With the development of the information society, the demand for various types of display devices for displaying images is increasing. There are many commonly used display devices, including liquid crystal displays, electroluminescent displays, quantum dot light-emitting displays, plasma displays, field emission displays, organic light-emitting displays, or micro-LED displays.

[0003] Such a display device has a touch-based user interface for detecting a touch input to a display panel using a user's finger or a pen (or a smart pen such as a stylus or any other object), and performing input processing based on the detected touch to provide more diverse functions.

[0004] For pen touch driving, as an example, uplink signals and downlink signals may be exchanged between the touch circuit and the pen.

[0005] The description provided in the background section should not be considered as prior art merely because it is mentioned in or related to the background section.The background section may include information describing one or more aspects of the subject technology. Summary of the invention

[0006] Therefore, the inventors of the present invention recognized the above-mentioned limitations or problems, as well as other limitations associated with the related art, and conducted various experiments to realize a touch display device in which pen touch driving and display driving can be performed simultaneously and a driving method for the touch display device.

[0007] Pen touch driving and display driving can be performed simultaneously.

[0008] In this case, a signal for pen touch driving may affect display driving.

[0009] As a result, there is a problem in that a problem occurs in the display panel.

[0010] Therefore, exemplary embodiments may provide a touch display device in which pen touch driving and display driving may be simultaneously performed, and a driving method for the touch display device.

[0011] Example embodiments may provide a touch display device capable of reducing or preventing the influence of pen touch driving on display driving and a driving method for the touch display device.

[0012] Example embodiments may provide a touch display device capable of preventing problems from occurring in a display panel and a driving method for the touch display device.

[0013] Example embodiments may provide a touch display device capable of improving performance of pen touch driving and a driving method for the touch display device.

[0014] Example embodiments may provide a touch display device that achieves low-power driving by reducing or preventing problems from occurring in a display panel, and a driving method for the touch display device.

[0015] An exemplary embodiment may provide a touch display device, comprising: a display panel on which a plurality of sub-pixels are arranged; a touch screen panel on which a plurality of touch electrodes are arranged; and a touch circuit for supplying an uplink signal and a touch drive signal to the touch screen panel, wherein the uplink signal comprises a first uplink signal and a second uplink signal, the first uplink signal being a first waveform signal being supplied to a first touch electrode among the touch electrodes, and the second uplink signal being a second waveform signal having a waveform different from that of the first waveform signal being supplied to a second touch electrode among the touch electrodes.

[0016] The second waveform signal may be a signal inverted relative to the first waveform signal. In another example, the second waveform signal may be a signal out of phase relative to the first waveform signal.

[0017] An exemplary embodiment may provide a driving method for a touch display device, the driving method comprising: an uplink signal output operation, which supplies an uplink signal to a touch screen panel on which a plurality of touch electrodes are arranged; a downlink signal output operation, in which a pen that has received the uplink signal outputs a downlink signal corresponding to the uplink signal, wherein a first uplink signal is supplied to a first touch electrode among the touch electrodes, and a second uplink signal is supplied to a second touch electrode among the touch electrodes.

[0018] According to exemplary embodiments, a touch display device capable of simultaneously performing pen touch driving and display driving and a driving method for the touch display device are provided.

[0019] Example embodiments may provide a touch display device capable of preventing pen touch driving from affecting display driving and a driving method for the touch display device.

[0020] Example embodiments may provide a touch display device capable of preventing problems from occurring in a display panel and a driving method for the touch display device.

[0021] Example embodiments may provide a touch display device capable of improving performance of pen touch driving and a driving method for the touch display device.

[0022] Example embodiments may provide a touch display device that realizes low-power driving by preventing problems from occurring in a display panel, and a driving method for the touch display device.

[0023] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concept as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present disclosure will be more clearly understood through the following detailed description in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a perspective view schematically showing a touch system according to an exemplary embodiment;

[0026] Figure 2 shows a display portion in a touch display device according to an exemplary embodiment;

[0027] Figure 3 An example of a touch display device according to an exemplary embodiment is shown;

[0028] Figure 4 An example of a touch sensing portion for mutual capacitance-based touch sensing in a touch display device according to an exemplary embodiment is shown;

[0029] Figure 5 is a driving timing diagram showing a time-division driving method of display driving and touch driving of a touch display device according to an exemplary embodiment;

[0030] Figure 6 is a driving timing diagram showing an independent driving method of display driving and touch driving of a touch display device according to an exemplary embodiment;

[0031] Figure 7 shows a touch driving operation between a touch display device and a pen according to an exemplary embodiment;

[0032] Figure 8 shows an example of a driving timing of a touch driving operation between a touch display device and a pen according to an exemplary embodiment;

[0033] Fig. 9 shows pen touch driving and finger touch driving performed during a single frame period according to an exemplary embodiment;

[0034] Fig.10shows an uplink signal supplied to a touch electrode according to an exemplary embodiment;

[0035] Fig.11 illustrates a problem occurring in a display panel according to an exemplary embodiment;

[0036] Fig.12 shows an uplink signal supplied to a touch electrode according to an exemplary embodiment;

[0037] Fig.13 and Fig.14 shows a first waveform signal and a second waveform signal according to an exemplary embodiment;

[0038] Figure 15 to Figure 22 shows an uplink signal supplied to a touch electrode according to an exemplary embodiment;

[0039] Fig.23 shows local actuation according to an exemplary embodiment;

[0040] Fig.24 and Fig.25 shows pen touch driving and finger touch driving performed during a single frame period according to an exemplary embodiment; and

[0041] Fig.26 is a flowchart illustrating a driving method for a touch display device according to an exemplary embodiment.

[0042] Throughout the drawings and detailed description, unless otherwise described, the same drawing reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustration, and convenience, the relative sizes and depictions of these elements may be exaggerated. DETAILED DESCRIPTION

[0043] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. When the elements in the accompanying drawings are indicated by reference numerals, even if the same elements are shown in different drawings, they will also be indicated by the same reference numerals. In addition, in the following description of the present disclosure, in the case where the detailed description of the known functions and configurations incorporated herein may make the subject matter of the present disclosure unclear, the description will be omitted. It should be understood that, unless expressly stated to the contrary, the terms "include", "comprise", "have" and any variants thereof used herein are intended to cover non-exclusive inclusions. Unless expressly stated to the contrary, the element description in the singular form used herein is intended to include the element description in the plural form.

[0044] The advantages and features of the present disclosure and methods for implementing the same will be illustrated by the example embodiments described below with reference to the accompanying drawings. However, the present disclosure may be implemented in different forms and should not be construed as being limited to the example embodiments set forth herein. On the contrary, these example embodiments are provided to make the present disclosure sufficiently comprehensive and complete to help those skilled in the art fully understand the scope of the present disclosure.

[0045] The shapes, sizes, proportions, angles, numbers, etc. of various example embodiments of the present disclosure shown in the accompanying drawings are given by way of example only. Therefore, the present disclosure is not limited to the illustrations in the accompanying drawings. Any implementation described herein as an "example" is not necessarily to be understood as being preferred or advantageous over other implementations.

[0046] In addition, terms such as first, second, A, B, (a) or (b) may be used herein when describing elements of the present disclosure. Each of these terms is not used to define the nature, order or sequence of the corresponding elements, but is only used to distinguish the corresponding elements from other elements.

[0047] In the description of various embodiments of the present disclosure, when describing a positional relationship, for example, when the positional relationship between two components is described as, for example, "on", "above", "below", and "beside", one or more other components may be located between the two components, unless more restrictive terms such as "only" or "directly" are used. For example, when one element or layer is disposed "on" another element or layer, a third layer or element may be disposed therebetween.

[0048] Terms such as "below," "lower," "above," "upper," etc. may be used to describe the relationship between elements as shown in the figures. It will be understood that these terms are spatially relative and based on the orientation depicted in the figures.

[0049] It should be understood that when it is mentioned that an element is “connected,” “coupled,” or “coupled” to another element, it may not only be “directly connected, coupled, or coupled” to the other element, but may also be “indirectly connected, coupled, or coupled” to the other element via an “intermediate” element. Here, the other element may be included in two or more elements that are “connected,” “coupled,” or “coupled” to each other.

[0050] When time or process related terms (such as "after", "subsequently", "next", "before", etc.) are used to describe elements, methods of operation, methods of manufacture, etc., these terms can be used to describe non-sequential or non-sequential processes or methods unless used with the terms "directly" or "immediately after".

[0051] The term "at least one" should be understood to include any and all combinations of one or more of the related listed items. For example, the meaning of "at least one of a first element, a second element, and a third element" includes the combination of all three listed elements, the combination of any two of the three elements, and each individual element: the first element, the second element, or the third element.

[0052] In addition, when any dimension or corresponding information (e.g., level) of an element is mentioned, even if the relevant description is not indicated, the dimension or corresponding information should be construed to include a tolerance or error range that may be caused by various factors (e.g., process factors, internal or external influences, and noise).

[0053] The features of the various embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may be technically driven and interoperable in various ways as can be fully understood by those skilled in the art. The embodiments of the present disclosure may be implemented independently of each other, or may be implemented together in a mutually dependent relationship.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those of ordinary skill in the art to which the exemplary embodiments belong. It should be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, for example, and should not be interpreted as an idealized or overly formal meaning unless explicitly defined as such herein. For example, as will be understood by those of ordinary skill in the art, the term "component" or "unit" may apply to a separate circuit or structure, an integrated circuit, a computational block of a circuit device, or any structure configured to perform the described function.

[0055] In addition, when any dimension, relative size, etc. is mentioned, the numerical value or corresponding information, (e.g., level, range, etc.) of the element or feature should be considered to include a tolerance range or error range that may be caused by various factors (such as process factors, internal or external influences, noise, etc.), even if no relevant description is indicated. In addition, the term "may" fully includes all meanings of the term "can".

[0056] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. For ease of description, the proportions of various elements shown in the drawings are different from the actual proportions, and therefore are not limited to the proportions shown in the drawings.

[0057] Various implementations will be described in detail below with reference to the accompanying drawings.

[0058] Figure 1 is a perspective view schematically illustrating a touch system according to an exemplary embodiment.

[0059] The touch system according to the exemplary embodiment may include a touch display device 10 , a pen 20 working in cooperation with the touch display device 10 , and the like.

[0060] The touch display device 10 can provide not only an image display function to display an image but also a touch sensing function using a finger, a pen 20 or the like.

[0061] Herein, the term "pen 20" may include an active pen, a passive pen, etc. An active pen is a touch tool that has a signal transmission and / or reception function, can cooperate with the touch display device 10, and / or includes a power source. A passive pen is a touch tool that does not have a signal transmission and reception function and does not have a power source.

[0062] In this context, the touch tool may be not only a finger but also any object that can represent a finger touching the screen, and may also be referred to as a touch object or a touch pointer.

[0063] Hereinafter, a finger may be regarded as a representative of a passive touch tool such as a passive pen, and the pen 20 may be regarded as a representative of an active touch tool such as an active pen. In this document, the pen 20 may also be referred to as a stylus, a stylus, an active stylus, etc.

[0064] The touch display device 10 according to the exemplary embodiment may be, for example, a television (TV), a monitor, a signage device, a game console, a home appliance, a vehicle, a building, etc., or may be a mobile device such as a tablet computer, a smartphone, a laptop, a navigation device, a camera, a multimedia player, etc.

[0065] The touch display device 10 according to the exemplary embodiment may include a display portion for providing an image display function and a touch sensing portion for touch sensing.

[0066] Figure 2 A display portion in the touch display device 10 according to an exemplary embodiment is shown.

[0067] See also Figure 2 , a display portion of the touch display device 10 according to an exemplary embodiment may include a display panel 110 , a data driver circuit 120 , a gate driver circuit 130 , a display controller 140 , and the like.

[0068] A plurality of data lines DL and a plurality of gate lines GL are provided in the display panel 110 , and a plurality of sub-pixels SP defined by the plurality of data lines DL and the plurality of gate lines GL are arranged.

[0069] The data driver circuit 120 drives the plurality of data lines DL by supplying data voltages to the plurality of data lines DL.

[0070] The gate driver circuit 130 drives the plurality of gate lines GL by, for example, sequentially supplying scan signals to the plurality of gate lines GL.

[0071] The display controller 140 supplies various control signals DCS and GCS to the data driver circuit 120 and the gate driver circuit 130 to control operations of the data driver circuit 120 and the gate driver circuit 130 .

[0072] The controller 140 starts scanning at a time point defined for each frame, converts image data input from an external source according to a data signal readable by the data driver circuit 120, outputs the converted image data DATA, and controls data driving at an appropriate time point in response to the scanning.

[0073] The display controller 140 may be a timing controller used in typical display technologies, or may be a control device that includes a timing controller and performs other control functions in addition to the timing controller.

[0074] The display controller 140 may be provided as a separate component from the data driver circuit 120 , or may be combined with the data driver circuit 120 to form an integrated circuit (IC).

[0075] As an example, the data driver circuit 120 may be implemented to include one or more source driver integrated circuits (SDICs), but is not limited thereto.

[0076] Each source driver integrated circuit may include a shift register, a latch circuit, a digital-to-analog converter (DAC), an output buffer, etc., and in some cases may also include an analog-to-digital converter (ADC). The implementation is not limited to this. As an example, each source driver integrated circuit may include one or more additional components, and / or one or more of the above components may be omitted.

[0077] The gate driver circuit 130 may be implemented to include one or more gate driver integrated circuits (GDICs).

[0078] Each gate driver integrated circuit may include a shift register, a level shifter, etc., but is not limited thereto.

[0079] Depending on the design of the display panel, the driving method, etc., the data driver circuit 120 may be located on one side of the display panel 110 (e.g., located at the upper or lower portion of the display panel 110 or located above or below the display panel 110), and in some cases, may be located on both sides of the display panel 110 (e.g., located at the upper and lower portion of the display panel 110 or located above and below the display panel 110).

[0080] The gate driver circuit 130 may be located on one side of the display panel 110 (e.g., located on the right portion or the left portion or on the right or left side), and in some cases, may be located on both sides of the display panel 110 (e.g., located on the right portion or the left portion or on the right or left side). Although it is shown that the data driver circuit 120 and the gate driver circuit 130 may be located on different sides of the display panel 110, the embodiment is not limited thereto. For example, the data driver circuit 120 and the gate driver circuit 130 may be located on at least one side of the same display panel 110.

[0081] In addition, the display panel 110 may be various types of display panels, such as a liquid crystal display panel, an electroluminescent display panel, an electrowetting display panel, an electronic ink display panel, a plasma display panel, and the like.

[0082] Figure 3 An example of a touch display device 10 according to an exemplary embodiment is shown.

[0083] Figure 3 A case in which the touch screen panel TSP is embedded in the display panel 110 is shown.

[0084] See also Figure 3 The touch circuit 300 may include: one or more touch driver circuits TIC, which are used to supply touch drive signals to the touch screen panel TSP and detect (receive) touch sensing signals from the touch screen panel TSP; a touch controller TCR, which is used to determine the presence and / or position of the touch input using the detection results of the touch sensing signals of the touch driver circuit TIC; and the like.

[0085] As an example, each of the one or more touch driver circuits TIC included in the touch circuit 300 may be implemented as a single integrated circuit (IC), but is not limited thereto.

[0086] Alternatively, as an example, each of the one or more touch driver circuits TIC included in the touch circuit 300 may be implemented as one integrated circuit SRIC together with a corresponding one of the one or more source driver integrated circuits SDIC forming the data driver circuit 120, but is not limited thereto. As an example, one or more of the touch driver circuits TIC included in the touch circuit 300 may be implemented as one integrated circuit SRIC together with one or more of the source driver integrated circuits SDIC forming the data driver circuit 120, but is not limited thereto.

[0087] As an example, the touch display device 10 may include one or more integrated circuits SRIC, and each integrated circuit SRIC may include a touch driver circuit TIC and a source driver integrated circuit SDIC.

[0088] As described above, by integrating the touch driver circuit TIC for touch driving and the source driver integrated circuit SDIC for data driving, touch driving and data driving can be effectively performed when the touch screen panel TSP is an internal type embedded in the display panel 110 and / or when the signal line SL connected to the touch electrode TE is arranged in parallel with the data line DL.

[0089] In addition, when the touch screen panel TSP is an internal type embedded in the display panel 110, each touch electrode TE may be implemented in various ways. When the self-capacitance method is applied, the touch electrode TE may have Figure 3 The arrangement of the touch electrodes TE shown in FIG. 1 is not limited thereto. When the mutual capacitance method is applied, the touch electrodes TE may have Figure 4 The arrangement of the touch electrodes TE is shown, but is not limited thereto.

[0090] When the touch display device 10 is implemented as a liquid crystal display or the like, as an example, a plurality of common electrodes supplied with a common voltage during a display driving period for displaying an image may be divided into blocks that may be used as touch electrodes TE. For example, when a touch drive signal is supplied or a touch sensing signal is detected, during a touch drive period for touch sensing, the common electrode may be applied as the touch electrode TE, and during a display drive period for displaying an image, a common voltage may be supplied (the embodiment is not limited thereto. As an example, the touch electrode TE may be provided separately from the common electrode).

[0091] In this case, as an example, during the display driving period, all the touch electrodes TE inside the touch circuit 300 may be electrically connected and may be commonly supplied with a common voltage.

[0092] During the touch driving period, one or all touch electrodes TE inside the touch circuit 300 can be selected, and a touch driving signal can be supplied from the touch driver circuit TIC of the touch circuit 300 to the selected one or more touch electrodes TE, or the touch driver circuit TIC of the touch circuit 300 can detect a touch sensing signal from one or all touch electrodes TE inside the touch circuit 300.

[0093] In addition, as an example, each touch electrode TE may have a plurality of slits to form an electric field with a plurality of pixel electrodes in a plurality of overlapping sub-pixels. These slits may become holes.

[0094] On the other hand, when the touch display device 10 is implemented as an organic light-emitting display, the plurality of touch electrodes TE and the plurality of signal lines SL may be located on an encapsulation layer disposed on a common electrode (e.g., a cathode), but not limited thereto, which is disposed on the front surface of the display panel 110 and is supplied with a common voltage.

[0095] Here, the common electrode disposed on the front surface of the display panel 110 may be, for example, a cathode of an organic light emitting diode (OLED) in each subpixel SP, the OLED includes an anode (corresponding to a pixel electrode) and a cathode, and the common voltage may be a cathode voltage.

[0096] In this case, as an example, each of the plurality of touch electrodes TE may be a type of electrode without an opening region, but is not limited thereto. As an example, each of the plurality of touch electrodes TE may still be a type of electrode with an opening region. In addition, as an example, each of the plurality of touch electrodes TE may be a transparent electrode for light emission from a sub-pixel SP, but is not limited thereto. The opening region may be referred to as an opening. As an example, each of the plurality of touch electrodes TE may be a transparent electrode while having an opening region, but is not limited thereto.

[0097] Alternatively, each of the plurality of touch electrodes TE may be a grid-type electrode having a plurality of opening areas. In this case, as an example, each opening area in each of the plurality of touch electrodes TE may correspond to one or more light-emitting areas of one or more sub-pixels SP (e.g., an area of ​​the sub-pixel SP where a portion of the anode is located). Embodiments are not limited thereto. As an example, at least one of the plurality of touch electrodes TE may overlap with one or more light-emitting areas of one or more sub-pixels SP (e.g., an area of ​​the sub-pixel SP where a portion of the anode is located).

[0098] On the other hand, as an example, during the touch drive period, when the panel drive signal is supplied to the touch electrode TE and the signal line SL, a signal identical to or corresponding to the panel drive signal may be supplied to other electrodes and signal lines not related to touch sensing, but is not limited thereto. Here, the panel drive signal may refer to a touch drive signal output from the touch circuit 300 to sense a touch input of a finger and / or the pen 20 or to recognize pen information from the pen 20. As an example, during the touch drive period, a signal different from the panel drive signal may be supplied to other electrodes and signal lines not related to touch sensing, or a signal may not be supplied to other electrodes and signal lines not related to touch sensing.

[0099] For example, during a touch driving period, a panel driving signal or a corresponding signal may be supplied to some or all of the data lines DL.

[0100] In another example, during the touch driving period, a panel driving signal or a corresponding signal may be supplied to some or all of the gate lines GL.

[0101] In another example, during the touch driving period, a panel driving signal or a corresponding signal may be supplied to some or all of the touch electrodes TE.

[0102] In addition, in an exemplary embodiment of the present disclosure, the panel driving signal may refer to any signal supplied to the touch screen panel TSP, the display panel 110, or the display panel 110 in which the touch screen panel TSP is embedded.

[0103] Regarding the implementation and placement of the integrated circuit, in the example, in the touch display device 10, the integrated circuit SRIC can be mounted on a film, one end of the film can be connected to the touch screen panel TSP, and the other end of the film can be connected to the printed circuit board PCB to electrically connect the touch driver circuit TIC and the source driver integrated circuit SDIC to the display panel 110. In this case, the integrated circuit SRIC can be called a chip-on-film (COF) structure.

[0104] The touch controller TCR may be mounted on a printed circuit board PCB, which is connected to a film on which an integrated circuit SRIC is mounted. The embodiment is not limited thereto. As an example, the touch controller TCR and the integrated circuit SRIC may both be disposed on a film or on a printed circuit board PCB, but are not limited thereto.

[0105] On the other hand, the integrated circuit SRIC may also be implemented as a chip on glass (COG) structure bonded to the surface of the touch screen panel TSP as an example, but is not limited thereto.

[0106] In addition, as an example, one or more touch driver circuits TIC and touch controllers TCR of the touch circuit 300 may be integrated into a single component.

[0107] Figure 4 An example of a touch sensing portion for touch sensing based on mutual capacitance in a touch display device according to an exemplary embodiment is shown.

[0108] refer to Figure 4 The touch display device 10 may sense the presence or absence of a touch of the finger and / or the pen 20 or the position of the touch using a capacitance-based touch sensing technology.

[0109] In this regard, Figure 4 As shown, the touch display device 10 may include a touch screen panel TSP on which a plurality of touch electrodes TE are disposed, and a touch circuit 300 driving the touch screen panel TSP.

[0110] The touch display device 10 may provide a touch sensing function based on mutual capacitance, which senses a touch input by measuring the capacitance generated between two touch electrodes Tx_TE and Rx_TE or a change thereof.

[0111] refer to Figure 4 As an example, for touch sensing based on mutual capacitance, first touch electrode lines TL1 to TL5 supplied with touch drive signals and second touch electrode lines RL1 to RL6 sensing touch sense signals may be arranged on the touch screen panel TSP. The first touch electrode lines may be referred to as touch drive lines. The second touch electrode lines may be referred to as touch sense lines. The embodiment is not limited thereto. As an example, the number of first touch electrode lines may be less than 5 or more than 5. As an example, the number of second touch electrode lines may be less than 6 or more than 6.

[0112] Each of the first touch electrode lines TL1 to TL5 may be a single rod-shaped electrode extending in a transverse direction, and each of the second touch electrode lines RL1 to RL6 may be a single rod-shaped electrode extending in a longitudinal direction, but are not limited thereto.

[0113] In another example, if Figure 4 As shown, each of the first touch electrode lines TL1 to TL5 may be formed by electrically connecting the first touch electrodes Tx_TE arranged in the same row, and each of the second touch electrode lines RL1 to RL6 may be formed by electrically connecting the second touch electrodes Rx_TE arranged in the same column. The first touch electrode Tx_TE may be referred to as a transmitting touch electrode Tx_TE or a touch drive electrode. The second touch electrode Rx_TE may be referred to as a receiving touch electrode Rx_TE or a touch sensing electrode. However, these are merely illustrative, and the second touch electrode Rx_TE may be a transmitting touch electrode Tx_TE or a touch drive electrode, and the first touch electrode Tx_TE may be a receiving touch electrode Rx_TE or a touch sensing electrode.

[0114] For example, a touch drive signal for detecting a finger touch or a pen touch generated by the touch circuit 300 may be supplied to the touch drive electrode. A touch sensing signal generated based on a capacitance change between the touch drive electrode and the touch sensing electrode caused by the finger touch or the pen touch may be supplied from the touch sensing electrode to the touch circuit 300 through the touch sensing line.

[0115] Each of the first touch electrode lines TL1 to TL5 may be electrically connected to the touch circuit 300 through one or more signal lines SL. Each of the second touch electrode lines RL1 to RL6 may be electrically connected to the touch circuit 300 through one or more signal lines SL. As an example, the signal lines SL may include the first touch electrode lines TL1 to TL5 and the second touch electrode lines RL1 to RL6.

[0116] Figure 4 The shown geometry of the single touch electrode TE is merely illustrative, and the touch electrode TE may be designed in various ways.

[0117] In addition, as an example, the size of the region in which a single touch electrode TE is disposed may correspond to the size of the region in which a single sub-pixel is disposed.

[0118] Alternatively, as an example, the size of the area in which the single touch electrode TE is disposed may be greater than the size of the area in which the single sub-pixel is disposed, or may be equal to or smaller than the size of the area in which the single sub-pixel is disposed. In this case, as an example, the single touch electrode TE may overlap with two or more data lines and / or two or more gate lines. As an example, the size of the area in which the single touch electrode TE is disposed may correspond to the size of the area in which one or more sub-pixels are disposed.

[0119] For example, the size of the region in which the single touch electrode TE is disposed may correspond to the size of the region of several to several tens of sub-pixels.

[0120] In addition, the touch screen panel TSP may be an external type touch screen panel manufactured separately from the display panel 110 and coupled to the display panel 110, or may be an embedded touch screen panel embedded in the display panel 110. The external type touch screen panel may also be referred to as an add-on touch screen panel, and the embedded touch screen panel may be referred to as an in-cell touch screen panel, an on-cell touch screen panel, etc.

[0121] When the touch screen panel TSP is embedded in the display panel 110 , the touch electrodes TE may be formed together with other electrodes or signal lines related to display driving during the manufacturing process of the display panel 110 .

[0122] Figure 5 2 is a driving timing diagram illustrating a time-division driving method of display driving and touch driving of the touch display device 10 according to an exemplary embodiment.

[0123] Reference now Figure 5 , the touch display device 10 according to the exemplary embodiment may perform “display driving” for displaying an image and “touch driving” for sensing a touch of the finger and / or pen 20 (ie, finger touch and / or pen touch) in a time-sharing manner.

[0124] In the touch display device 10 , the display driving period D and the touch driving period T are alternately allocated.

[0125] During the display driving period D, display driving is performed to display an image. During the touch driving period T, touch driving (eg, finger touch driving and / or pen touch driving) is performed to sense a finger touch or a pen touch.

[0126] In such a time-division driving method, the touch driving period T may be a blanking period in which display driving is not performed.

[0127] On the other hand, the touch display device 10 can generate a synchronization signal TSYNC swinging between a high level and a low level, and use the synchronization signal TSYNC to identify or control the display driving period D and the touch driving period T. As an example, the synchronization signal TSYNC defines a driving timing control signal of the touch driving period T.

[0128] For example, a high level segment (or a low level segment) of the synchronization signal TSYNC may indicate a touch driving period T, and a low level segment (or a high level segment) of the synchronization signal TSYNC may indicate a display driving period D.

[0129] On the other hand, as an example, a single display frame period may include a single display driving period and a single touch driving period. In this case, as an example, the touch driving may be performed after displaying a single display frame picture, but is not limited thereto.

[0130] In another example, a single display frame period may include one or more display driving periods and one or more touch driving periods. In another example, a single display frame period may include two or more display driving periods and two or more touch driving periods.

[0131] For example, see Figure 5 , a single display frame period may include 16 display drive periods (D1 to D16) and 16 touch drive periods (T1 to T16). In this case, a single display frame screen may be divided into 1 / 16 display frame screens, and touch drive may be performed between these 1 / 16 display frame screens.

[0132] Figure 6 2 is a driving timing diagram illustrating an independent driving method of display driving and touch driving of the touch display device 10 according to an exemplary embodiment.

[0133] refer to Figure 6 , the touch display device 10 according to the exemplary embodiment may independently perform “display driving” for displaying an image and “touch driving” for sensing a touch of the finger and / or pen 20 (ie, finger touch and / or pen touch).

[0134] In this case, if Figure 6As shown, as an example, the display driver and the touch driver can be executed in different times divided in a time-sharing manner or can be executed simultaneously. Alternatively, as an example, the display driver and the touch driver can be executed in different divided times first, and then executed simultaneously at some time points.

[0135] When the display driver and the touch driver are executed independently, the touch driver may be executed independently of the display driver, and vice versa.

[0136] In the touch display device 10 , the display driving period D and the touch driving period T are alternately allocated.

[0137] For example, when the display driving and the touch driving are simultaneously performed, the touch driving may be performed to sense a finger touch or a pen touch while an image is being displayed according to the display driving.

[0138] When the display driving and the touch driving are performed independently, the display driving period may be controlled by a conventional display driving control signal (eg, a vertical synchronization signal Vsync), and the touch driving period may be controlled by a synchronization signal TSYNC.

[0139] In this case, the synchronization signal TSYNC can only define the touch driving period T, which is the same as Figure 5 The synchronization signal TSYNC that separately defines the display driving period D and the touch driving period T is different.

[0140] For example, a period in which the synchronization signal TSYNC is at a high level (or a low level) may indicate a touch driving period T in which touch driving is performed, and a period in which the synchronization signal TSYNC is at a low level (or a high level) may indicate a period in which touch driving is not performed.

[0141] In addition, during a single high level period (or low level period) of the synchronization signal TSYNC, that is, during a single touch drive period, a finger touch and / or pen touch can be sensed once on the entire screen area. In this case, a single touch drive period can correspond to a single touch frame period.

[0142] In another example, during two or more high level periods (or low level periods) in the synchronization signal TSYNC, that is, during two or more touch drive periods, a finger touch and / or pen touch may be sensed over the entire screen area. In this case, the two or more touch drive periods may correspond to a single touch frame period.

[0143] For example, during 16 high level periods (or low level periods) of the synchronization signal TSYNC, that is, during 16 touch drive periods, the last finger touch and / or pen touch can be sensed in the entire screen area. In this case, 16 touch drive periods can correspond to a single touch frame period.

[0144] In each touch driving period T, finger touch driving may be performed to sense a finger touch, or pen touch driving may be performed to sense a pen touch.

[0145] In addition, the touch screen panel TSP may be embedded in the display panel 110, or may exist outside the display panel 110. For ease of explanation, the touch screen panel TSP is described below by taking the touch screen panel TSP embedded in the display panel 110 as an example, and the touch screen panel TSP will also be referred to as panel TSP for short.

[0146] Figure 7 A touch driving operation between the touch display device 10 and the pen 20 according to an exemplary embodiment is shown.

[0147] In case of pen driving to sense the pen touch, the touch circuit 300 of the touch display device 10 exchanges signals with the pen 20 through the touch screen panel TSP. However, the present disclosure is not limited thereto.

[0148] The signal fed from the touch circuit 300 to the touch screen panel TSP and transmitted to the pen 20 through the touch screen panel TSP is called an uplink signal, and the signal output from the pen 20 to the touch screen panel TSP and transmitted to the touch circuit 300 through the touch screen panel TSP is called a downlink signal. However, the present disclosure is not limited thereto.

[0149] The method, timing, etc. for sending and receiving signals between the touch display device 10 and the pen 20 for pen touch driving, and the resulting pen touch sensing, the format of the sent and received signals, etc., are predefined as a protocol, and such a protocol can be implemented as a program or code or data related to program execution, and stored in or executed by the touch circuit 300 and the pen 20 or any other component.

[0150] In order to perform pen touch driving to sense pen touch, the touch display device 10 may provide an uplink signal to the pen 20. The uplink signal includes various information required to define the association operation between the touch display device 10 and the pen 20, control the driving operation of the pen 20, or drive the pen 20, but is not limited thereto.

[0151] More specifically, the touch circuit 300 of the touch display device 10 supplies an uplink signal to one or more of the plurality of touch electrodes TE included in the touch screen panel TSP. Therefore, the pen 20 adjacent to the touch screen panel TSP can receive the uplink signal through one or more of the plurality of touch electrodes TE included in the touch screen panel TSP. However, the present disclosure is not limited thereto.

[0152] In response to an uplink signal transmitted from the touch display device 10 , the pen 20 may output a downlink signal that enables the touch circuit 300 to sense pen coordinates (also referred to as position) and / or pen tilt (also referred to simply as tilt) for the pen 20 .

[0153] Alternatively, as an example, the pen 20 may output a downlink signal indicating various additional information or the like in response to an uplink signal transmitted by the touch display device 10 .

[0154] As described above, the downlink signal output from the pen 20 may be supplied to one or more of the plurality of touch electrodes TE included in the touch screen panel TSP. However, the present disclosure is not limited thereto.

[0155] The touch circuit 300 of the touch display device 10 may receive a downlink signal output from the pen 20 through one or more touch electrodes TE, and sense a pen coordinate and / or a pen tilt of the pen 20 based on the received downlink signal and / or recognize various additional information about the pen 20. However, the present disclosure is not limited thereto.

[0156] The uplink signal mentioned above may include, for example, a beacon, a ping signal, etc.

[0157] The beacon is a control signal that defines a linked operation between the touch display device 10 and the pen 20 , and the beacon controls a driving operation of the pen 20 , or includes various information required for the driving operation of the pen 20 .

[0158] For example, the beacon may include one or more of panel information (e.g., panel status information, panel identification information, panel type information (e.g., intra-unit type)), panel drive mode information (e.g., mode identification information such as pen search mode or pen mode), downlink signal characteristic information (e.g., frequency or number of pulses), drive timing-related information, multiplexer drive information, power mode information (e.g., LHB information for not driving the panel and pen to reduce power consumption), etc., and may also include information for synchronized driving between the display touch screen panel TSP and the pen 20.

[0159] The ping signal may be a synchronization control signal for synchronization of a downlink signal.

[0160] The additional information that may be included in the downlink signal may include, for example, one or more of the following: pen pressure, pen ID, button information, battery information, information for checking and correcting information errors, and the like.

[0161] Figure 8An example of a driving timing of a touch driving operation between the touch display device 10 and the pen 20 according to an exemplary embodiment is shown.

[0162] exist Figure 8 In the example of , 16 touch driving periods T1 to T16 are regularly repeated. In this case, the 16 touch driving periods T1 to T16 may be referred to as a single touch frame period, and both a finger touch and a pen touch may be sensed during the single touch frame period.

[0163] Figure 8 A downlink signal output from the pen 20 and various signals (including an uplink signal) supplied by the touch circuit 300 to the touch screen panel TSP according to a timing specified by a protocol are shown.

[0164] refer to Figure 8 During a single touch frame period corresponding to the 16 touch drive periods T1 to T16, a beacon (i.e., one of the uplink signals) may be transmitted from the touch screen panel TSP to the pen 20 at least once or twice, and the beacon transmission period may be one or more touch drive periods predetermined by the protocol among the 16 touch drive periods T1 to T16 ( Figure 8 In the example, T1). The period of supplying the beacon to the touch screen panel TSP may occur in a blanking period in which display driving is not performed. However, the period of supplying the beacon to the touch screen panel TSP may also occur during an active period in which display driving is performed.

[0165] The beacon may be sent periodically in every single touch frame period, periodically in every two or more touch frame periods, in a touch frame period based on the occurrence of a predetermined event, or in a random touch frame period.

[0166] When a beacon is transmitted from the touch screen panel TSP to the pen 20, the pen 20 may respond to the beacon and perform touch driving in a predetermined time period ( Figure 8 In the example, downlink signals are output within T2, T3, T5, T6, T7, T9, T13, T14 and T15).

[0167] The downlink signal output from the pen 20 may be a downlink signal that enables the touch display device 10 to sense the pen coordinates (ie, position) and / or the pen inclination of the pen 20 .

[0168] For example, a single downlink signal output from the pen 20 may be a downlink signal that enables the touch display device 10 to sense one of the pen coordinates and the pen tilt of the pen 20 , or may be a downlink signal that enables the touch display device 10 to sense both the pen coordinates and the pen tilt of the pen 20 .

[0169] In addition, the downlink signal output from the pen 20 may be a downlink signal representing data including various additional information of the pen 20. Here, the data includes various additional information of the pen 20. The various additional information may include, for example, pen pressure, pen ID, button information, battery information, information for checking and correcting information errors, and the like.

[0170] The downlink signal output from the pen 20 may be supplied to one or more of the plurality of touch electrodes TE included in the touch screen panel TSP. However, the present disclosure is not limited thereto.

[0171] Reference now Figure 8 , the 16 touch driving periods T1 to T16 included in a single touch frame period may include one or more touch driving periods T2, T5, T9, and T13 for sensing at least one of the pen coordinates and the pen tilt.

[0172] In response to these touch driving periods T2 , T5 , T9 , and T13 , the pen 20 may output a downlink signal related to sensing one or more of the pen coordinates and the pen tilt.

[0173] In this case, the downlink signal may be a signal composed of pulses that periodically swing between a high level and a low level, but is not limited thereto. The implementation is not limited thereto. As an example, the downlink signal may also be a signal composed of non-periodic pulses.

[0174] In addition, refer to Figure 8 , the 16 touch driving periods T1 to T16 included in a single touch frame period may include one or more touch driving periods T3 , T6 , T7 , T14 , and T15 in which data may be sensed.

[0175] According to these touch driving periods T3 , T6 , T7 , T14 , and T15 , the pen 20 may output a downlink signal related to data sensing.

[0176] In this case, the downlink signal may be a signal composed of non-periodic pulses representing additional information included in the data. The embodiment is not limited thereto. As an example, the downlink signal may also be a signal composed of pulses that swing periodically.

[0177] As described above, when a downlink signal is output from the pen 20 according to the touch driving period specified by the protocol, the touch circuit 300 may receive the downlink signal via the touch screen panel TSP and perform pen sensing based on the received downlink signal.

[0178] Here, performing pen sensing may include one or more of sensing pen coordinates, sensing pen inclination, and recognizing additional pen information included in the data Data.

[0179] On the other hand, the 16 touch driving periods T1 to T16 included in a single touch frame period may include one or more touch driving periods (eg, T4, T8, T10, T11, T12, and T16) for sensing a finger touch.

[0180] During one or more of these touch driving periods (e.g., T4, T8, T10, T11, T12, and T16), the touch circuit 300 may supply a touch driving signal TDS for sensing a finger touch to some or all of the plurality of touch electrodes TE included in the touch screen panel TSP.

[0181] The touch drive signal TDS may be a signal that swings between a high level and a low level. That is, the touch drive signal TDS may be a modulated signal having a variable voltage level.

[0182] On the other hand, in the touch driving periods T1, T2, T3, T5, T6, T7, T9, T13, T14 and T15 for sensing the pen touch, the touch circuit 300 may supply a DC voltage having a constant voltage level to the touch screen panel TSP during the remaining touch driving periods T2, T3, T5, T6, T7, T9, T13, T14 and T15 except the touch driving period T1 corresponding to the beacon transmission period.

[0183] Here, the DC voltage may be a low level voltage (eg, a low level voltage of the touch driving signal TDS or a beacon), a high level voltage, any voltage between the low level voltage and the high level voltage, or a ground voltage.

[0184] exist Figure 8 In the touch driving period T1, T2, T3, T5, T6, T7, T9, T13, T14, T15, the touch driving for sensing the pen touch is referred to as the pen touch driving PTD. In addition, the touch driving for sensing the finger touch is referred to as the finger touch driving FTD during the touch driving period T4, T8, T10, T11, T12, T16.

[0185] Fig. 9 It is shown that the pen touch driving and the finger touch driving are performed during a single frame period Frame according to an exemplary embodiment.

[0186] Fig.10 An uplink signal U supplied to the touch electrode TE according to an exemplary embodiment is shown.

[0187] Fig.11 A problem occurring in the display panel 110 according to an exemplary embodiment is shown.

[0188] refer to Fig. 9 , a single frame period Frame may include an active period Ta and a blanking period Tb. The active period Ta may correspond to a display driving period, and the blanking period Tb may correspond to a period in which display driving is not performed.

[0189] The pen signal S_Pen may include an uplink signal U and a downlink signal D.

[0190] During the blanking period Tb, the uplink signal U from the touch circuit 300 may be supplied to the touch screen panel TSP. When the uplink signal U is simultaneously supplied to the entire touch screen panel TSP, this may be referred to as global driving. When the uplink signal U is supplied to a portion of the touch screen panel TSP, this may be referred to as local driving.

[0191] During the active period Ta, the downlink signal D from the pen 20 may be supplied to the touch screen panel TSP.

[0192] The finger signal S_Finger may include a finger touch drive signal F.

[0193] During the active period Ta, the finger touch driving signal F from the touch circuit 300 may be supplied to the touch screen panel TSP. However, the present disclosure is not limited thereto.

[0194] When the touch display device 10 operates at 120 Hz, the duration of one frame may be 8.3 ms. In this case, the active period Ta may be 7.96 ms, and the blanking period Tb may be 0.34 ms.

[0195] When the touch display device 10 is driven at 120 Hz, the pen signal S_Pen may be synchronized to 240 Hz and supplied to the touch screen panel TSP. Since the uplink signal U is supplied during the blanking period Tb, the period during which the uplink signal U is supplied may be less than 0.34 ms.

[0196] When the touch display device 10 is driven at 120 Hz, the finger signal S_Finger may be synchronized to 240 Hz and supplied to the touch screen panel TSP. A period during which the finger signal S_Finger is supplied during the active period Ta may be 1.2 ms.

[0197] Here, a driving operation of supplying the uplink signal U during the blank period Tb may be referred to as a first global driver Global1 , and a driving operation of supplying the uplink signal U during the active period Ta may be referred to as a second global driver Global2 .

[0198] refer to Fig.10 , Fig.10The touch electrode TE shown can be connected with Figure 4 The touch electrodes TE shown are identical.

[0199] refer to Fig.10 , the transmitting touch electrode Tx_TE may include a first transmitting electrode 1011 to an eighth transmitting electrode 1018 , and the receiving touch electrode Rx_TE may include a first receiving electrode 1021 to an eighth receiving electrode 1028 .

[0200] An uplink signal ULS_tx for a plurality of transmission electrodes may be supplied to the transmission touch electrode Tx_TE. An uplink signal for the ath transmission electrode (where a is a natural number) may be supplied to the ath transmission electrode. For example, an uplink signal ULS_tx1 for the first transmission electrode may be supplied to the first transmission electrode 1011, and an uplink signal ULS_tx8 for the eighth transmission electrode may be supplied to the eighth transmission electrode 1018. The same uplink signal ULS_tx for a plurality of transmission electrodes may be supplied to the first transmission electrode 1011 to the eighth transmission electrode 1018.

[0201] The uplink signal ULS_rx for multiple receiving electrodes may be supplied to the receiving touch electrode Rx_TE. The uplink signal for the a-th receiving electrode may be supplied to the a-th receiving electrode. For example, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1021, and the uplink signal ULS_rx8 for the eighth receiving electrode may be supplied to the eighth receiving electrode 1028. The same uplink signal ULS_rx for multiple receiving electrodes may be supplied to the first receiving electrode 1021 to the eighth receiving electrode 1028.

[0202] The uplink signal ULS_tx for multiple transmitting electrodes may be an alternating current (AC) signal. The uplink signal ULS_tx for multiple transmitting electrodes may be a signal that alternates between a high voltage level and a low voltage level. The uplink signal ULS_tx for multiple transmitting electrodes may be a signal that maintains a high voltage level during a first time period and maintains a low voltage level during a second time period. The length of the first time period and the length of the second time period may be different, but depending on the design, the length of the first time period and the length of the second time period may be the same. The uplink signal ULS_rx for multiple receiving electrodes may be the same as the uplink signal ULS_tx for multiple transmitting electrodes. The uplink signal ULS_tx for multiple transmitting electrodes and the uplink signal ULS_rx for multiple receiving electrodes may be included in Fig. 9 The uplink signal U is shown.

[0203] As an example, the display driving period and the uplink signal sending period can be driven in different time periods, which can be called "time-sharing driving"; as another example, the display driving period and the uplink signal sending period can be driven independently of each other in time, which can be called "concurrent driving".

[0204] When the display driving period and the uplink signal transmission period are driven in a time-division manner, the uplink signal U may be supplied to the touch screen panel TSP during the blanking period Tb. In the case where the display driving period and the uplink signal transmission period are driven in a time-division manner, the display driving period and the uplink signal transmission period are performed in separate periods, so that the uplink signal U may not affect the display driving.

[0205] refer to Fig. 9 When the display driving period and the uplink signal transmission period are driven in a time-sharing manner, the uplink signal U may be supplied to the touch screen panel TSP through the first global driver Global1. When the uplink signal U is supplied to the touch screen panel TSP through the first global driver Global1, the uplink signal U may not affect the display driving.

[0206] When the display driving period and the uplink signal transmission period are performed simultaneously, the display driving period and the uplink signal transmission period may be performed independently of each other. Therefore, the period during which the uplink signal U is supplied to the touch screen panel TSP may be a blank period Tb or an active period Ta.

[0207] refer to Fig. 9 , when the display driving period and the uplink signal transmission period are performed simultaneously, the uplink signal U may be supplied to the touch screen panel TSP through the first global driver Global1 or the second global driver Global2. In the second global driver Global2, the uplink signal U may be supplied to the touch screen panel TSP during the active period Ta. Since the uplink signal U is supplied to the touch electrode TE, the uplink signal U may affect the display driving.

[0208] refer to Fig.11 , the touch electrode TE and the cathode CE may be coupled through the parasitic capacitance Cpara. The cathode CE may also be referred to as a common electrode. The uplink signal U supplied to the touch electrode TE may affect the cathode CE. That is, when the uplink signal U is supplied to the touch screen panel TSP during the active period Ta, the cathode CE may be affected by the uplink signal U supplied to the touch electrode TE.

[0209] The voltage supplied to the cathode CE may be affected by the uplink signal U supplied to the touch electrode TE. Fluctuation of the voltage supplied to the cathode CE may affect the data voltage Vdata supplied through the data line DL. Fig.11 , a problem may occur in the display panel 110. The problem occurring in the display panel 110 may appear in the form of lines, dots, stains, etc. That is, the quality of the display panel 110 may be degraded.

[0210] Therefore, exemplary embodiments may provide a touch display device capable of simultaneously performing pen touch driving and display driving, and a driving method for the touch display device.

[0211] Example embodiments may provide a touch display device capable of reducing or preventing pen touch driving from affecting display driving, and a driving method for the touch display device.

[0212] Example embodiments may provide a touch display device capable of reducing or preventing problems occurring in a display panel and a driving method for the touch display device.

[0213] Example embodiments may provide a touch display device capable of improving pen touch performance and a driving method for the touch display device.

[0214] Example embodiments may provide a touch display device that realizes low-power driving by reducing or preventing problems from occurring in a display panel, and a driving method for the touch display device.

[0215] Fig.12 An uplink signal U supplied to the touch electrode TE according to an exemplary embodiment is shown.

[0216] Fig.13 and Fig.14 A first waveform signal and a second waveform signal according to an exemplary embodiment are shown.

[0217] Fig.12 The touch electrode TE shown can be connected with Fig.10 The touch electrodes TE shown are identical. As an example, the number of transmitting electrodes and the number of receiving electrodes may be equal to or different from each other.

[0218] refer to Fig.12 , the transmitting touch electrode Tx_TE may include a plurality of transmitting electrodes. The plurality of transmitting electrodes may include a first transmitting electrode 1211 to an eighth transmitting electrode 1218. For ease of explanation, the plurality of transmitting electrodes are shown as eight transmitting electrodes, but the plurality of transmitting electrodes may include more than eight transmitting electrodes or less than eight transmitting electrodes. The plurality of transmitting electrodes may be touch drive electrodes.

[0219] refer to Fig.12 , the receiving touch electrode Rx_TE may include a plurality of receiving electrodes. The plurality of receiving electrodes may include a first receiving electrode 1221 to an eighth receiving electrode 1228. For ease of explanation, the plurality of receiving electrodes are shown as eight receiving electrodes, but the plurality of receiving electrodes may include more than eight receiving electrodes or less than eight receiving electrodes. The plurality of receiving electrodes may be touch sensing electrodes.

[0220] The uplink signal ULS_tx for the plurality of transmission electrodes may be supplied to the transmission touch electrode Tx_TE. The uplink signal ULS_tx for the plurality of transmission electrodes may include uplink signals from an uplink signal ULS_tx1 for the first transmission electrode to an uplink signal ULS_tx8 for the eighth transmission electrode.

[0221] The uplink signal ULS_rx for the plurality of reception electrodes may be supplied to the reception touch electrode Rx_TE. The uplink signal ULS_rx for the plurality of reception electrodes may include uplink signals from an uplink signal ULS_rx1 for the first reception electrode to an uplink signal ULS_rx8 for the eighth reception electrode.

[0222] The uplink signal ULS_tx for multiple transmitting electrodes may be an AC signal. The uplink signal ULS_tx for multiple transmitting electrodes may be various waves such as a sine wave, a triangle wave, a square wave, etc. The uplink signal ULS_tx for multiple transmitting electrodes may be a signal alternating between a high voltage level and a low voltage level. The uplink signal ULS_tx for multiple transmitting electrodes may be a signal that maintains a high voltage level during a first period and a low voltage level during a second period. The length of the first period and the length of the second period may be different, but according to the design, the length of the first period and the length of the second period may be the same. The uplink signal ULS_rx for multiple receiving electrodes may be the same as the uplink signal ULS_tx for multiple transmitting electrodes.

[0223] refer to Fig.12 , some of the uplink signals ULS_tx for the plurality of transmitting electrodes may be the first waveform signals WF1 , and the rest of the uplink signals ULS_tx for the plurality of transmitting electrodes may be the second waveform signals WF2 .

[0224] refer to Fig.12 , some of the uplink signals ULS_rx for the plurality of receive electrodes may be the first waveform signals WF1 , and the rest of the uplink signals ULS_rx for the plurality of receive electrodes may be the second waveform signals WF2 .

[0225] refer to Fig.13 and Fig.14 The first waveform signal WF1 and the second waveform signal WF2 may be in the form of signals that are at least partially inverted relative to each other. The second waveform signal WF2 may be a signal that is at least partially out of phase relative to the first waveform signal WF1.

[0226] See also Fig.13 and Fig.14 , the waveforms of the first waveform signal WF1 and the second waveform signal WF2 may be determined by the bit value. For example, when the bit value changes irregularly, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals in which the high voltage level VH and the low voltage level VL alternate at irregular intervals. In addition, when the bit value changes regularly, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals in which the high voltage level VH and the low voltage level VL alternate at regular intervals.

[0227] refer to Fig.13 , the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals in which a high voltage level and a low voltage level alternate at irregular intervals.

[0228] refer to Fig.13 During the first period T1 (ie, the period between the first time point t1 and the second time point t2), the first waveform signal WF1 may be at a high voltage level VH, and the second waveform signal WF2 may be at a low voltage level VL.

[0229] refer to Fig.13 During the second period T2 (ie, the period between the second time point t2 and the third time point t3), the first waveform signal WF1 may be at a low voltage level VL, and the second waveform signal WF2 may be at a high voltage level VH.

[0230] refer to Fig.13 During the third period T3 (ie, the period between the third time point t3 and the fourth time point t4), the first waveform signal WF1 may be at the high voltage level VH, and the second waveform signal WF2 may be at the low voltage level VL.

[0231] See also Fig.13 During the fourth period T4 (ie, the period between the fourth time point t4 and the fifth time point t5), the first waveform signal WF1 may be at the low voltage level VL, and the second waveform signal WF2 may be at the high voltage level VH.

[0232] See also Fig.13During the fifth period T5 (ie, the period between the fifth time point t5 and the sixth time point t6), the first waveform signal WF1 may be at the high voltage level VH, and the second waveform signal WF2 may be at the low voltage level VL.

[0233] See also Fig.13 During the sixth period T6 (ie, the period between the sixth time point t6 and the seventh time point t7), the first waveform signal WF1 may be at the low voltage level VL, and the second waveform signal WF2 may be at the high voltage level VH.

[0234] See also Fig.13 , the first period T1 to the sixth period T6 may have different lengths. That is, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals that alternate between a high voltage level VH and a low voltage level VL at irregular intervals. In addition, the first waveform signal WF1 and the second waveform signal WF2 may be in the form of signals that are inverted relative to each other. Fig.13 The length of each of the first to sixth periods T1 to T6 shown in FIG. 1 is merely illustrative and may be modified in various ways as long as the first and second waveform signals WF1 and WF2 are AC signals that alternate between a high voltage level VH and a low voltage level VL at irregular intervals.

[0235] refer to Fig.14 , the first waveform signal WF1 and the second waveform signal WF2 may be alternating current signals that alternate between a high voltage level VH and a low voltage level VL at regular intervals.

[0236] refer to Fig.14 During the first period T1' (ie, the period between the first time point t1' and the second time point t2'), the first waveform signal WF1 may be at a high voltage level VH, and the second waveform signal WF2 may be at a low voltage level VL.

[0237] refer to Fig.14 During the second period T2' (ie, the period between the second time point t2' and the third time point t3'), the first waveform signal WF1 may be at a low voltage level VL, and the second waveform signal WF2 may be at a high voltage level VH.

[0238] refer to Fig.14 During the third period T3' (ie, the period between the third time point t3' and the fourth time point t4'), the first waveform signal WF1 may be at the high voltage level VH, and the second waveform signal WF2 may be at the low voltage level VL.

[0239] refer to Fig.14During the fourth period T4' (ie, the period between the fourth time point t4' and the fifth time point t5'), the first waveform signal WF1 may be at the low voltage level VL, and the second waveform signal WF2 may be at the high voltage level VH.

[0240] refer to Fig.14 During the fifth period T5' (ie, the period between the fifth time point t5' and the sixth time point t6'), the first waveform signal WF1 may be at the high voltage level VH, and the second waveform signal WF2 may be at the low voltage level VL.

[0241] refer to Fig.14 During the sixth period T6' (ie, the period between the sixth time point t6' and the seventh time point t7'), the first waveform signal WF1 may be at the low voltage level VL, and the second waveform signal WF2 may be at the high voltage level VH.

[0242] refer to Fig.14 , the first period T1' to the sixth period T6' may have the same length. That is, the first waveform signal WF1 and the second waveform signal WF2 may be AC ​​signals in which the high voltage level VH and the low voltage level VL alternate at regular intervals. In addition, the first waveform signal WF1 and the second waveform signal WF2 may be in the form of signals inverted relative to each other.

[0243] refer to Fig.12 During the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to the transmission touch electrode Tx_TE. In addition, during the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to the reception touch electrode Rx_TE.

[0244] refer to Fig.12 , the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for odd-numbered transmitting electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for odd-numbered transmitting electrodes may be supplied to the odd-numbered transmitting electrodes 1211, 1213, 1215, and 1217.

[0245] refer to Fig.12, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be supplied to the even-numbered transmitting electrodes 1212, 1214, 1216, and 1218.

[0246] refer to Fig.12 , the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for odd-numbered receiving electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for odd-numbered receiving electrodes may be supplied to the odd-numbered receiving electrodes 1221, 1223, 1225, and 1227.

[0247] refer to Fig.12 , the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be supplied to the even-numbered receiving electrodes 1222, 1224, 1226, and 1228.

[0248] Since the first waveform signal WF1 and the second waveform signal WF2 are alternately supplied to the touch electrode TE, the problem of preventing the display driving from being affected by the uplink signal U can be reduced.

[0249] Figure 15 to Figure 22 An uplink signal U supplied to the touch electrode TE according to an exemplary embodiment is shown.

[0250] refer to Fig.15 , the display device 100 may be driven by a local driving method.

[0251] refer to Fig.15 During the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to the transmission touch electrode Tx_TE. In contrast, during the uplink signal transmission period, a signal other than the uplink signal U may be supplied to the reception touch electrode Rx_TE.

[0252] refer to Fig.15, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be supplied to the odd-numbered transmitting electrodes 1211, 1213, 1215, and 1217. However, the present disclosure is not limited thereto.

[0253] refer to Fig.15 , the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be supplied to the even-numbered transmitting electrodes 1212, 1214, 1216, and 1218. However, the present disclosure is not limited thereto.

[0254] refer to Fig.15 , the uplink signal U may be supplied only to the transmission touch electrode Tx_TE, and signals other than the uplink signal U may be supplied to the reception touch electrode Rx_TE. As an example, a direct current (DC) voltage or a ground voltage may be supplied to the reception touch electrode Rx_TE, or the reception touch electrode Rx_TE may be maintained in a floating state.

[0255] refer to Fig.15 Since the display device 100 is driven by the local driving method, power consumption can be reduced. However, the display device 100 may be driven by other driving methods as long as power consumption can be reduced.

[0256] refer to Fig.16 , the display device 100 may be driven by a local driving method.

[0257] refer to Fig.16 During the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to the reception touch electrode Rx_TE. In contrast, during the uplink signal transmission period, a signal other than the uplink signal U may be supplied to the transmission touch electrode Tx_TE.

[0258] refer to Fig.16, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for odd-numbered receiving electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for odd-numbered receiving electrodes may be supplied to the odd-numbered receiving electrodes 1221, 1223, 1225, and 1227. However, the present disclosure is not limited thereto.

[0259] refer to Fig.16 , the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be supplied to the even-numbered receiving electrodes 1222, 1224, 1226, and 1228. However, the present disclosure is not limited thereto.

[0260] refer to Fig.16 , the uplink signal U may be supplied only to the reception touch electrode Rx_TE, and signals other than the uplink signal U may be supplied to the transmission touch electrode Tx_TE. As an example, a DC voltage or a ground voltage may be supplied to the transmission touch electrode Tx_TE, or the transmission touch electrode Tx_TE may be maintained in a floating state.

[0261] refer to Fig.16 , since the display device 100 is driven by the local driving method, power consumption can be reduced.

[0262] refer to Fig.17 , the display device 100 may be driven by a local driving method.

[0263] refer to Fig.17 , during the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to some of the transmission touch electrodes Tx_TE. Conversely, during the uplink signal transmission period, signals other than the uplink signal U may be supplied to the remaining transmission touch electrodes Tx_TE and the reception touch electrodes Rx_TE. However, the present disclosure is not limited thereto.

[0264] refer to Fig.17, the uplink signal ULS_tx1 for the first transmission electrode and the uplink signal ULS_tx3 for the third transmission electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx1 for the first transmission electrode may be supplied to the first transmission electrode 1211, and the uplink signal ULS_tx3 for the third transmission electrode may be supplied to the third transmission electrode 1213.

[0265] refer to Fig.17 , the uplink signal ULS_tx2 for the second transmission electrode and the uplink signal ULS_tx4 for the fourth transmission electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx2 for the second transmission electrode may be supplied to the second transmission electrode 1212, and the uplink signal ULS_tx4 for the fourth transmission electrode may be supplied to the fourth transmission electrode 1214. However, the present disclosure is not limited thereto.

[0266] refer to Fig.17 , only some of the transmission electrodes 1211, 1212, 1213, and 1214 may be supplied with an uplink signal U, while the remaining transmission electrodes 1215, 1216, 1217, and 1218 and the receiving touch electrode Rx_TE may be supplied with signals other than the uplink signal U. As an example, a DC voltage or a ground voltage may be supplied to the remaining transmission electrodes 1215, 1216, 1217, and 1218 and the receiving touch electrode Rx_TE. Alternatively, the remaining transmission electrodes 1215, 1216, 1217, and 1218 and the receiving touch electrode Rx_TE may be kept in a floating state. However, the present disclosure is not limited thereto.

[0267] refer to Fig.17 , since the display device 100 is driven by the local driving method, power consumption can be reduced.

[0268] refer to Fig.18 , the display device 100 may be driven by a local driving method.

[0269] refer to Fig.18 During the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to some of the reception touch electrodes Rx_TE. Conversely, during the uplink signal transmission period, signals other than the uplink signal U may be supplied to the remaining reception touch electrodes Rx_TE and the transmission touch electrodes Tx_TE.

[0270] refer to Fig.18, the uplink signal ULS_rx1 for the first receiving electrode and the uplink signal ULS_rx3 for the third receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1221, and the uplink signal ULS_rx3 for the third receiving electrode may be supplied to the third receiving electrode 1223. However, the present disclosure is not limited thereto.

[0271] refer to Fig.18 , the uplink signal ULS_rx2 for the second receiving electrode and the uplink signal ULS_rx4 for the fourth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx2 for the second receiving electrode may be supplied to the second receiving electrode 1222, and the uplink signal ULS_rx4 for the fourth receiving electrode may be supplied to the fourth receiving electrode 1224. However, the present disclosure is not limited thereto.

[0272] refer to Fig.18 , only some of the receiving electrodes 1221, 1222, 1223, and 1224 may be supplied with the uplink signal U, while the remaining receiving electrodes 1225, 1226, 1227, and 1228 and the transmitting touch electrode Tx_TE may be supplied with signals other than the uplink signal U. As an example, a DC voltage or a ground voltage may be supplied to the remaining receiving electrodes 1225, 1226, 1227, and 1228 and the transmitting touch electrode Tx_TE. Alternatively, the remaining receiving electrodes 1225, 1226, 1227, and 1228 and the transmitting touch electrode Tx_TE may be kept in a floating state.

[0273] refer to Fig.18 , since the display device 100 is driven by the local driving method, power consumption can be reduced.

[0274] refer to Fig.19 During the uplink signal transmission period, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the transmitting touch electrode Tx_TE. In addition, during the uplink signal transmission period, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the receiving touch electrode Rx_TE.

[0275] refer to Fig.19, the uplink signal ULS_tx1 for the first transmission electrode and the uplink signal ULS_tx2 for the second transmission electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx1 for the first transmission electrode may be supplied to the first transmission electrode 1211, and the uplink signal ULS_tx2 for the second transmission electrode may be supplied to the second transmission electrode 1212.

[0276] refer to Fig.19 , the uplink signal ULS_tx3 for the third transmission electrode and the uplink signal ULS_tx4 for the fourth transmission electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx3 for the third transmission electrode may be supplied to the third transmission electrode 1213, and the uplink signal ULS_tx4 for the fourth transmission electrode may be supplied to the fourth transmission electrode 1214. However, the present disclosure is not limited thereto.

[0277] refer to Fig.19 , the uplink signal ULS_tx5 for the fifth transmission electrode and the uplink signal ULS_tx6 for the sixth transmission electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx5 for the fifth transmission electrode may be supplied to the fifth transmission electrode 1215, and the uplink signal ULS_tx6 for the sixth transmission electrode may be supplied to the sixth transmission electrode 1216.

[0278] refer to Fig.19 , the uplink signal ULS_tx7 for the seventh transmission electrode and the uplink signal ULS_tx8 for the eighth transmission electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx7 for the seventh transmission electrode may be supplied to the seventh transmission electrode 1217, and the uplink signal ULS_tx8 for the eighth transmission electrode may be supplied to the eighth transmission electrode 1218.

[0279] refer to Fig.19 , the uplink signal ULS_rx1 for the first receiving electrode and the uplink signal ULS_rx2 for the second receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1221, and the uplink signal ULS_rx2 for the second receiving electrode may be supplied to the second receiving electrode 1222.

[0280] refer to Fig.19, the uplink signal ULS_rx3 for the third receiving electrode and the uplink signal ULS_rx4 for the fourth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx3 for the third receiving electrode may be supplied to the third receiving electrode 1223, and the uplink signal ULS_rx4 for the fourth receiving electrode may be supplied to the fourth receiving electrode 1224.

[0281] refer to Fig.19 , the uplink signal ULS_rx5 for the fifth receiving electrode and the uplink signal ULS_rx6 for the sixth receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx5 for the fifth receiving electrode may be supplied to the fifth receiving electrode 1225, and the uplink signal ULS_rx6 for the sixth receiving electrode may be supplied to the sixth receiving electrode 1226.

[0282] refer to Fig.19 , the uplink signal ULS_rx7 for the seventh receiving electrode and the uplink signal ULS_rx8 for the eighth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx7 for the seventh receiving electrode may be supplied to the seventh receiving electrode 1227, and the uplink signal ULS_rx8 for the eighth receiving electrode may be supplied to the eighth receiving electrode 1228. Although Fig.19 , it is shown that two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the transmitting touch electrode Tx_TE, and two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the receiving touch electrode Rx_TE, but the embodiment is not limited thereto. As an example, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to the transmitting touch electrode Tx_TE, and one first waveform signal WF1 and one second waveform signal WF2 may be alternately supplied to the receiving touch electrode Rx_TE, and vice versa.

[0283] refer to Fig. 20 , the display device 100 may be driven by a local driving method.

[0284] refer to Fig. 20, during the uplink signal transmission period, two first waveform signals WF1 and two second waveform signals WF2 may be alternately supplied to some of the transmitting touch electrodes Tx_TE. In contrast, during the uplink signal transmission period, signals other than the uplink signal U may be supplied to the remaining transmitting touch electrodes Tx_TE and the receiving touch electrodes Rx_TE. Although it is shown that the two first waveform signals WF1 and the two second waveform signals WF2 may be alternately supplied to some consecutive transmitting touch electrodes Tx_TE among the transmitting touch electrodes Tx_TE, the embodiment is not limited thereto. As an example, the two first waveform signals WF1 and the two second waveform signals WF2 may be alternately supplied to some discontinuous transmitting touch electrodes Tx_TE among the transmitting touch electrodes Tx_TE.

[0285] refer to Fig. 20 , the uplink signal ULS_tx1 for the first transmission electrode and the uplink signal ULS_tx2 for the second transmission electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_tx1 for the first transmission electrode may be supplied to the first transmission electrode 1211, and the uplink signal ULS_tx2 for the second transmission electrode may be supplied to the second transmission electrode 1212.

[0286] refer to Fig. 20 , the uplink signal ULS_tx3 for the third transmission electrode and the uplink signal ULS_tx4 for the fourth transmission electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_tx3 for the third transmission electrode may be supplied to the third transmission electrode 1213, and the uplink signal ULS_tx4 for the fourth transmission electrode may be supplied to the fourth transmission electrode 1214.

[0287] refer to Fig. 20 , since the display device 100 is driven by the local driving method, power consumption can be reduced.

[0288] refer to Fig.21 , the display device 100 may be driven by a local driving method.

[0289] refer to Fig.21 During the uplink signal transmission period, the first waveform signal WF1 and the second waveform signal WF2 may be alternately supplied to some of the reception touch electrodes Rx_TE. Conversely, during the uplink signal transmission period, signals other than the uplink signal U may be supplied to the remaining reception touch electrodes Rx_TE and the transmission touch electrodes Tx_TE.

[0290] refer to Fig.21, the uplink signal ULS_rx1 for the first receiving electrode and the uplink signal ULS_rx2 for the second receiving electrode may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signal ULS_rx1 for the first receiving electrode may be supplied to the first receiving electrode 1221, and the uplink signal ULS_rx2 for the second receiving electrode may be supplied to the second receiving electrode 1222.

[0291] refer to Fig.21 , the uplink signal ULS_rx3 for the third receiving electrode and the uplink signal ULS_rx4 for the fourth receiving electrode may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signal ULS_rx3 for the third receiving electrode may be supplied to the third receiving electrode 1223, and the uplink signal ULS_rx4 for the fourth receiving electrode may be supplied to the fourth receiving electrode 1224.

[0292] refer to Fig.21 , since the display device 100 is driven by a local driving method, power consumption can be reduced. Although it is shown and described that one first waveform signal WF1 and one second waveform signal WF2 or two first waveform signals WF1 and two second waveform signals WF2 can be alternately supplied to at least some of the transmitting touch electrodes Tx_TE and / or at least some of the receiving touch electrodes Rx_TE, the embodiment is not limited thereto. As an example, one first waveform signal WF1 and two second waveform signals WF2 can be alternately supplied to at least some of the transmitting touch electrodes Tx_TE and / or at least some of the receiving touch electrodes Rx_TE, or two first waveform signals WF1 and one second waveform signal WF2 can be alternately supplied to at least some of the transmitting touch electrodes Tx_TE and / or at least some of the receiving touch electrodes Rx_TE. As an example, one or more (e.g., three or more) first waveform signals WF1 and one or more (e.g., three or more) second waveform signals WF2 can be alternately supplied to at least some of the transmitting touch electrodes Tx_TE and / or at least some of the receiving touch electrodes Rx_TE.

[0293] refer to Fig. 22 When changing from the nth frame Frame(n) to the n+1th frame Frame(n+1), the first waveform signal WF1 may be changed into the second waveform signal WF2, and the second waveform signal WF2 may be changed into the first waveform signal WF1.

[0294] During the uplink signal transmission period of the nth frame Frame(n), the uplink signal U supplied to the touch screen panel TSP may be connected to the touch screen panel TSP. Fig.12The uplink signals U shown are identical.

[0295] The n+1th frame Frame(n+1) may be any frame that appears after the nth frame Frame(n). As an example, the n+1th frame Frame(n+1) may be a frame that immediately follows the nth frame Frame(n). As another example, the n+1th frame Frame(n+1) may be a frame that follows the frame that immediately follows the nth frame Frame(n). As an example, the first waveform signal WF1 may be changed to the second waveform signal WF2 in every frame or every two or more frames, but is not limited thereto. Similarly, as an example, the second waveform signal WF2 may be changed to the first waveform signal WF1 in every frame or every two or more frames, but is not limited thereto.

[0296] During the uplink signal sending period of the n+1th frame Frame(n+1), the first waveform signal WF1 of the uplink signal U of the nth frame Frame(n) can be changed to the second waveform signal WF2, and the second waveform signal WF2 of the uplink signal U of the nth frame Frame(n) can be changed to the first waveform signal WF1.

[0297] refer to Fig. 22 , in the n+1th frame Frame(n+1), the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_tx1, ULS_tx3, ULS_tx5, and ULS_tx7 for the odd-numbered transmitting electrodes may be supplied to the odd-numbered transmitting electrodes 1211, 1213, 1215, and 1217.

[0298] refer to Fig. 22 , in the n+1th frame Frame(n+1), the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_tx2, ULS_tx4, ULS_tx6, and ULS_tx8 for the even-numbered transmitting electrodes may be supplied to the even-numbered transmitting electrodes 1212, 1214, 1216, and 1218.

[0299] refer to Fig. 22, in the n+1th frame Frame(n+1), the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be the second waveform signal WF2. During the uplink signal transmission period, the uplink signals ULS_rx1, ULS_rx3, ULS_rx5, and ULS_rx7 for the odd-numbered receiving electrodes may be supplied to the odd-numbered receiving electrodes 1221, 1223, 1225, and 1227.

[0300] refer to Fig. 22 , in the n+1th frame Frame(n+1), the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be the first waveform signal WF1. During the uplink signal transmission period, the uplink signals ULS_rx2, ULS_rx4, ULS_rx6, and ULS_rx8 for the even-numbered receiving electrodes may be supplied to the even-numbered receiving electrodes 1222, 1224, 1226, and 1228.

[0301] During the uplink signal transmission period of the n+1th frame Frame(n+1), Figure 15 to Figure 18 , Fig. 20 and Fig.21 The local drive method shown in . In addition, it is also possible to apply Fig.19 The method of alternately driving two first waveform signals WF1 and two second waveform signals WF2 shown in .

[0302] Fig.23 A local drive according to an exemplary embodiment is shown.

[0303] In the global driving method, the uplink signal may be supplied to the entire area of ​​the touch screen panel TSP. In this case, communication with the pen 20 may be easily performed. In contrast, when the local driving method is used, the uplink signal may be supplied to a partial area of ​​the touch screen panel TSP. In this case, power consumption may be relatively further reduced.

[0304] refer to Fig.23 , the area of ​​the touch screen panel TSP may be divided into a first area A1 and a second area A2. When the touch screen panel TSP is driven by a local driving method, an uplink signal may be supplied only to the first area A1.

[0305] refer to Fig.23, the second area A2 may be an area to which an uplink signal is not supplied. That is, since it is not desired to supply an uplink signal to the second area A2, voltage control is not performed, and the touch electrodes in the second area A2 may be in a floating state. However, for the stability of voltage control, a ground voltage or a constant DC voltage may be supplied to the touch electrodes in the second area A2. In addition, in some cases, an AC signal different from the uplink signal may be supplied to the touch electrodes in the second area A2.

[0306] refer to Fig.23 , the area of ​​the touch screen panel TSP is illustrated as being divided into a first area A1 and a second area A2, but the division manner of the area of ​​the touch screen panel TSP is not limited. For example, the touch screen panel TSP may include a plurality of areas to which uplink signals are supplied and a plurality of areas to which uplink signals are not supplied. Fig.23 , the first area A1 and the second area A2 are shown as rectangles, but the division manner of the areas is not limited.

[0307] Fig.24 and Fig.25 It is shown that the pen touch driving and the finger touch driving are performed during a single frame period Frame according to an exemplary embodiment.

[0308] refer to Fig.24 ,because Figure 12 to Figure 22 The alternating uplink signal U shown in FIG. 1 is supplied to the touch electrode TE, so the problem that the display drive is affected by the uplink signal U can be reduced or prevented. Therefore, the display drive period and the uplink signal transmission period can be operated simultaneously. Even in the case where the display drive period and the uplink signal transmission period are operated simultaneously, the problem that the display drive is affected by the uplink signal U can be reduced or prevented.

[0309] refer to Fig.24 , when the display driving period and the uplink signal transmission period are driven simultaneously, it is not necessary to match the period for supplying the uplink signal U with the blanking period Tb. Therefore, the period for supplying the uplink signal U and the blanking period Tb can be independent of each other.

[0310] In order to explain a specific period of time, it is assumed that the touch display device 10 is driven at 120 Hz. In this case, the duration of a single frame period Frame may be 8.3 ms.

[0311] In the case of time-sharing driving, when the period of supplying the uplink signal U is about 0.34ms, the blanking period Tb should be at least greater than 0.34ms. Since the embodiment can realize simultaneous driving, the period of supplying the uplink signal U and the blanking period Tb are independent of each other. Therefore, the blanking period Tb can be relatively reduced. For example, when the period of supplying the uplink signal U is about 0.34ms, the blanking period Tb can be reduced to 0.08ms. In this case, the active period Ta can be increased to 8.2ms. The embodiment is not limited to this. As an example, the blanking period Tb can be reduced to any period less than 0.34ms, and the active period T can be increased to any period greater than 7.96ms. As an example, the blanking period may not be reduced even in simultaneous driving.

[0312] As described above, even in the case where the embodiment operates by simultaneous driving, it is possible to reduce or avoid the problem that the display driving is affected by the uplink signal U. However, in addition to the simultaneous driving, the display driving period and the uplink signal transmission period can also be applied to time-division driving.

[0313] refer to Fig.25 , the period during which the uplink signal U is supplied may be during the blanking period Tb. In this case, as an example, the blanking period Tb may be adjusted to match the period during which the uplink signal U is supplied. Fig.24 When the blanking period Tb is 0.08ms, Fig.25 The blanking period Tb in may be 0.34 ms. When the period of supplying the uplink signal U coincides with the blanking period Tb, the influence of the time-division driving on the cathode CE can be reliably reduced or prevented.

[0314] Fig.26 is a flowchart illustrating a driving method for a touch display device according to an exemplary embodiment.

[0315] The driving method of the touch display device may include: an uplink signal output stage S2601 and a downlink signal output stage S2602.

[0316] The uplink signal output stage S2601 may be an operation of supplying an uplink signal to a touch screen panel on which a plurality of touch electrodes are arranged. The uplink signal may include a first uplink signal and a second uplink signal. The first uplink signal may be supplied to the first touch electrode, and the second uplink signal may be supplied to the second touch electrode. The first uplink signal may have a positive signal value, and the second uplink signal may have a negative signal value.

[0317] The downlink signal output stage S2602 may be an operation in which the pen supplied with the uplink signal outputs a downlink signal corresponding to the uplink signal.

[0318] The above implementation mode is briefly described below.

[0319] An embodiment may provide a touch display device, which includes: a display panel, on which a plurality of sub-pixels are arranged; a touch screen panel, on which a plurality of touch electrodes are arranged; and a touch circuit, which supplies an uplink signal and a touch drive signal to the touch screen panel, wherein the uplink signal includes a first uplink signal and a second uplink signal, the first uplink signal being a first waveform signal being supplied to a first touch electrode among the touch electrodes, and the second uplink signal being a second waveform signal having a waveform different from the first waveform signal being supplied to a second touch electrode among the touch electrodes.

[0320] The second waveform signal may be a signal having an inverted phase relative to the first waveform signal.

[0321] The second waveform signal may be a signal that is out of phase with respect to the first waveform signal.

[0322] The touch electrode may include a plurality of transmitting electrodes and a plurality of receiving electrodes alternately arranged with the transmitting electrodes.

[0323] The first touch electrode may be a first transmitting electrode, and the second touch electrode may be a second transmitting electrode. When the third uplink signal as the first waveform signal is supplied to the first receiving electrode among the receiving electrodes, the fourth uplink signal as the second waveform signal may be supplied to the second receiving electrode among the receiving electrodes.

[0324] The first touch electrode may be a first transmission electrode, and the second touch electrode may be a second transmission electrode.The reception electrode may be in a floating state or supplied with a direct current voltage.

[0325] The third transmission electrode and the fourth transmission electrode among the transmission electrodes may be in a floating state or supplied with a direct current voltage.

[0326] The first touch electrode may be a first receiving electrode, and the second touch electrode may be a second receiving electrode.The transmitting electrode may be in a floating state, or a direct current voltage may be supplied to the transmitting electrode.

[0327] The third receiving electrode and the fourth receiving electrode among the receiving electrodes may be in a floating state or supplied with a direct current voltage.

[0328] The second touch electrode may be disposed adjacent to the first touch electrode.

[0329] The third touch electrode and the fourth touch electrode of the touch electrodes may be arranged between the first touch electrode and the second touch electrode. The third touch electrode arranged adjacent to the first touch electrode may be supplied with a third uplink signal as a first waveform signal. The fourth touch electrode arranged adjacent to the second touch electrode may be supplied with a fourth uplink signal as a second waveform signal.

[0330] The first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode may be transmitting electrodes. A plurality of receiving electrodes may be disposed to alternate with the transmitting electrodes, the receiving electrodes being in a floating state or being supplied with a DC voltage.

[0331] The first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode may be receiving electrodes. A plurality of transmitting electrodes may be disposed to alternate with the receiving electrodes, the transmitting electrodes being in a floating state or being supplied with a DC voltage.

[0332] The period during which the touch circuit is driven may include a first period and a second period. During the first period, the first touch electrode may be supplied with a first uplink signal as a first waveform signal, and the second touch electrode may be supplied with a second uplink signal as a second waveform signal. During a second period after the first period, the first touch electrode may be supplied with the first uplink signal as a second waveform signal, and the second touch electrode may be supplied with the second uplink signal as the first waveform signal.

[0333] The touch screen panel may include a first area and a second area, the touch circuit may supply an uplink signal to the first area, and touch electrodes located in the second area among the touch electrodes may be in a floating state or supplied with a direct current voltage.

[0334] The uplink signal may include a beacon signal.

[0335] During a single frame display activity period, the touch circuit can supply an uplink signal to the touch screen panel.

[0336] The period during which the display panel is driven may include an active period, in which the sub-pixels emit light, and a blanking period, in which the sub-pixels are in a non-light-emitting state. During the blanking period, an uplink signal may be supplied to the touch screen panel.

[0337] An embodiment may provide a driving method for a touch display device, the driving method comprising: an uplink signal output operation of supplying an uplink signal to a touch screen panel, a plurality of touch electrodes being arranged on the touch screen panel; and a downlink signal output operation, in which a pen that has received the uplink signal outputs a downlink signal corresponding to the uplink signal, wherein a first uplink signal is supplied to a first touch electrode among the touch electrodes, and a second uplink signal is supplied to a second touch electrode among the touch electrodes.

[0338] The first touch electrodes and the second touch electrodes may extend in a single direction and be adjacent to each other.

[0339] The above description provides examples of the present disclosure for illustrative purposes only. It will be appreciated by those skilled in the art that various modifications may be made without departing from the essential features of the present disclosure. Therefore, the examples disclosed in the present disclosure are intended to illustrate the technical concept of the present disclosure, and the scope of the present disclosure is not limited thereto.

[0340] CROSS-REFERENCE TO RELATED APPLICATIONS

[0341] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0091450, filed on Jul. 14, 2023, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein.

Claims

1. A touch display device, comprising: A display panel, on which a plurality of sub-pixels are arranged; A touch screen panel, on which a plurality of touch electrodes are arranged; as well as a touch circuit configured to supply an uplink signal and a touch drive signal to the touch screen panel, The uplink signal includes a first uplink signal and a second uplink signal. wherein, in a first period, the first uplink signal as a first waveform signal is supplied to a first touch electrode among the plurality of touch electrodes, and Here, in the first period, the second uplink signal, which is a second waveform signal having a waveform different from that of the first waveform signal, is supplied to a second touch electrode among the plurality of touch electrodes.

2. The touch display device according to claim 1, wherein: The second waveform signal is a signal inverted with respect to the first waveform signal.

3. The touch display device according to claim 1, wherein: The second waveform signal is a signal that is out of phase with respect to the first waveform signal.

4. The touch display device according to claim 1, wherein: The touch electrodes include a plurality of transmitting electrodes and a plurality of receiving electrodes crossing the plurality of transmitting electrodes.

5. The touch display device according to claim 4, wherein: The first touch electrode is a first transmitting electrode, and the second touch electrode is a second transmitting electrode, and Among them, in the first period, when the third uplink signal as the first waveform signal is supplied to the first receiving electrode among the multiple receiving electrodes, the fourth uplink signal as the second waveform signal is supplied to the second receiving electrode among the multiple receiving electrodes.

6. The touch display device according to claim 4, wherein: The first touch electrode is a first transmitting electrode, and the second touch electrode is a second transmitting electrode, and Wherein, in the first time period, the plurality of receiving electrodes are in a floating state or are supplied with a direct current voltage.

7. The touch display device according to claim 4, wherein: The first touch electrode is a first transmitting electrode, and the second touch electrode is a second transmitting electrode, and In the first period, the third transmitting electrode and the fourth transmitting electrode among the plurality of transmitting electrodes are in a floating state or are supplied with a direct current voltage.

8. The touch display device according to claim 4, wherein: The first touch electrode is a first receiving electrode, and the second touch electrode is a second receiving electrode, and In the first period, the plurality of transmission electrodes are in a floating state, or a direct current voltage is supplied to the plurality of transmission electrodes.

9. The touch display device according to claim 8, wherein: In the first period, the third receiving electrode and the fourth receiving electrode among the plurality of receiving electrodes are in a floating state or are supplied with a direct current voltage.

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

11. The touch display device according to claim 1, wherein: A third touch electrode and a fourth touch electrode of the plurality of touch electrodes are disposed between the first touch electrode and the second touch electrode, wherein, in the first period, the third touch electrode disposed adjacent to the first touch electrode is supplied with a third uplink signal as the first waveform signal, and In the first period, the fourth touch electrode disposed adjacent to the second touch electrode is supplied with a fourth uplink signal as the second waveform signal.

12. The touch display device according to claim 11, wherein: The first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode are transmitting electrodes, and The plurality of receiving electrodes are arranged to cross the plurality of transmitting electrodes, and in the first period, the plurality of receiving electrodes are in a floating state or are supplied with a direct current voltage.

13. The touch display device according to claim 11, wherein: The first touch electrode, the second touch electrode, the third touch electrode, and the fourth touch electrode are receiving electrodes, and Wherein, a plurality of transmitting electrodes are arranged to cross the receiving electrodes, and in the first period, the plurality of transmitting electrodes are in a floating state or are supplied with a direct current voltage.

14. The touch display device according to claim 1, wherein: The time period during which the touch circuit is driven also includes a second time period, During the second period after the first period, the first touch electrode is supplied with the first UP LINK signal as the second waveform signal, and the second touch electrode is supplied with the second UP LINK signal as the first waveform signal.

15. The touch display device according to claim 1, wherein: The touch screen panel includes a first area and a second area, wherein the touch circuit is configured to supply the uplink signal to the first region, and The touch electrodes located in the second area among the plurality of touch electrodes are in a floating state or are supplied with a direct current voltage.

16. The touch display device according to claim 1, wherein: The uplink signal comprises a beacon signal.

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

18. The touch display device according to claim 1, wherein: The display panel is driven during an active period and a blanking period. During the active period, the sub-pixel emits light, and during the blanking period, the sub-pixel is in a non-light-emitting state. During the blanking period, the uplink signal is supplied to the touch screen panel.

19. A driving method, comprising the following steps: an uplink signal output operation of supplying an uplink signal to a touch screen panel on which a plurality of touch electrodes are disposed; as well as a downlink signal output operation in which the pen having received the uplink signal outputs a downlink signal corresponding to the uplink signal, wherein, in a first period, a first uplink signal as a first waveform signal is supplied to a first touch electrode among the plurality of touch electrodes, and In the first period, a second uplink signal, which is a second waveform signal having a waveform different from that of the first waveform signal, is supplied to a second touch electrode among the plurality of touch electrodes.

20. The driving method according to claim 19, wherein: The first touch electrodes and the second touch electrodes extend in a single direction and are adjacent to each other.

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