Touch display device

Abstract

To provide a touch display device that enhances touch sensing accuracy in an edge area of the touch display device.SOLUTION: A touch display device comprises: a display panel DISP including data lines, gate lines, and subpixels, located in a display area AA and touch electrodes TE that overlap at least one subpixel; a touch power circuit configured to generate and output a signal with a modulated pulse width, in accordance with a voltage pulse corresponding to an input pulse with modulation signal; a gate driving circuit configured to supply a scan signal to the gate lines; and a display controller configured to output a gate driving circuit control signal that controls a driving timing of the gate driving circuit. The display panel includes first wiring 1360 located in a non-display area around the display area and receives the gate driving circuit control signal and second wiring 1350 wider than the first wiring and receives the signal with the modulated pulse width.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a touch display device.

Background Art

[0002] As the information society develops, the requirements for touch display devices for displaying images are increasing in various forms. In recent years, various display devices such as liquid crystal display devices and organic light-emitting display devices have been utilized.

[0003] Among such display devices, there is a touch display device that provides a touch-based input method that breaks away from conventional input methods such as buttons, keyboards, and mice, and allows users to intuitively and conveniently input information and commands.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments of the present disclosure can provide a touch display device with improved touch sensing accuracy in an edge region of the touch display device.

Means for Solving the Problems

[0005] Embodiments of the present disclosure include a display panel in which a plurality of data lines, a plurality of gate lines, and a plurality of sub-pixels are located in a display area, and a plurality of touch electrodes overlapping at least one sub-pixel; a touch power circuit that generates and outputs a signal with a modulated pulse width in response to a voltage pulse corresponding to an input pulse width modulation signal; a gate driving circuit that supplies a scan signal to the plurality of gate lines; a display controller that outputs a gate driving circuit control signal for controlling the driving timing of the gate driving circuit; a first wiring located in a non-display area around the display area in the display panel to which the gate driving circuit control signal is applied; and a second wiring located in the non-display area, having a wider width than the first wiring, to which the signal with the modulated pulse width is applied.

[0006] Embodiments of the present disclosure relate to a display panel in which a plurality of data lines, a plurality of gate lines, and a plurality of sub-pixels are located in a display area, and a plurality of touch electrodes overlapping at least one sub-pixel; a touch power circuit that outputs a signal with a modulated pulse width and a display signal in response to a voltage pulse corresponding to an input pulse width modulation signal; a gate driving circuit that receives the display signal and generates and outputs a scan signal to be supplied to the plurality of gate lines; a display controller that outputs a gate driving circuit control signal for controlling the driving timing of the gate driving circuit; a first wiring located in a non-display area around the display area in the display panel and to which the gate driving circuit control signal is applied; and a second wiring located in the non-display area, having a wider width than the first wiring, and to which a signal with a modulated pulse width or a display signal is applied. A touch display device can be provided.

Advantages of the Invention

[0007] According to embodiments of the present disclosure, a touch display device with improved touch sensing accuracy in the edge region of the touch display device can be provided.

Brief Description of the Drawings

[0008]

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DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to exemplary drawings. When adding reference numerals to the components of each drawing, for the same components, even if they are shown on other drawings, they may be assigned the same reference numerals as much as possible. In the description of the present disclosure, when it is determined that a specific description of a related known configuration or function may obscure the gist of the present disclosure, the detailed description thereof will be omitted. When terms such as "including", "having", and "composed of" mentioned in this specification are used, other parts may be added unless "only" is used. When a component is expressed in the singular, it can include the case of including a plurality, unless otherwise explicitly stated.

[0010] In addition, when describing the components of the present disclosure, terms such as first, second, A, B, (a), (b), etc. can be used. These terms are only for distinguishing the components from other components, and the essence, order, sequence, number, etc. of the components are not limited by these terms.

[0011] In the description of the positional relationship of components, when two or more components are described as "connected", "coupled", or "connected", it should be understood that two or more components can be directly "connected", "coupled", or "connected", but it is also possible that two or more components and other components are further "interposed" and "connected", "coupled", or "connected". Here, the other components may be included in one or more of the two or more components that are "connected", "coupled", or "connected" to each other.

[0012] In the description of the relationship of the time flow regarding components, operation methods, manufacturing methods, etc., for example, when the time sequence relationship or the flow sequence relationship is described by "after ~", "subsequent to ~", "next to ~", "before ~", etc., it may include cases where it is not continuous unless "immediately" or "directly" is used.

[0013] On the other hand, when a numerical value related to a component or its corresponding information (for example, level, etc.) is mentioned, the numerical value or its corresponding information can be interpreted as including the range of errors that can occur due to various factors (for example, process factors, internal or external impacts, noise, etc.) even without separate explicit description.

[0014] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0015] FIG. 1 is a schematic system configuration diagram of a touch display device 100 according to an embodiment of the present disclosure, FIG. 2 is a diagram briefly showing the display driving of the touch display device 100 according to an embodiment of the present disclosure, and FIG. 3 is a diagram briefly showing the touch driving of the touch display device 100 according to an embodiment of the present disclosure.

[0016] Referring to FIG. 1, a touch display device 100 according to an embodiment of the present disclosure can provide a display function for displaying images. The touch display device 100 according to an embodiment of the present disclosure can provide a touch sensing function for sensing a user's touch and a touch input function for performing input processing according to the user's touch by using the result of the touch sensing function.

[0017] Hereinafter, display driving for providing the display function will be described with reference to FIGS. 1 and 2, and components and touch driving for providing the touch sensing function will be described with reference to FIGS. 1 and 3.

[0018] Referring to FIGS. 1 and 2, a touch display device 100 according to an embodiment of the present disclosure can include a display panel DISP where a plurality of data lines DL and a plurality of gate lines GL are located to provide a display function. A plurality of sub-pixels SP electrically connected to the plurality of data lines DL and the plurality of gate lines GL may be located on the display panel DISP. The touch display device 100 according to an embodiment of the present disclosure can include the display panel DISP, a data driving circuit DDC configured to drive the plurality of data lines DL, a gate driving circuit GDC configured to drive the plurality of gate lines GL, and a display controller DCTR configured to control the data driving circuit DDC and the gate driving circuit GDC.

[0019] The display controller DCTR can supply various control signals to the data driving circuit DDC and the gate driving circuit GDC to control the data driving circuit DDC and the gate driving circuit GDC.

[0020] For example, in order to control the gate driver circuit GDC, the display controller DCTR outputs various gate drive circuit control signals (GCS: Gate Control Signal) including a gate start pulse (GSP: Gate Start Pulse), a gate shift clock (GSC: Gate Shift Clock), a gate output enable signal (GOE: Gate Output Enable), etc.

[0021] Also, in order to control the data driver circuit DDC, the display controller DCTR outputs various data drive circuit control signals (DCS: Data Control Signal) including a source start pulse (SSP: Source Start Pulse), a source sampling clock (SSC: Source Sampling Clock), a source output enable signal (SOE: Source Output Enable), etc.

[0022] The display controller DCTR starts scanning according to the timing realized in each frame, converts the input video data input from the outside into a data signal format used by the data driver circuit DDC, outputs the converted video data, and can control the data drive at an appropriate time according to the scan.

[0023] The gate driver circuit GDC sequentially supplies a scan signal of an on voltage or an off voltage to a plurality of gate lines GL according to the control of the display controller DCTR.

[0024] When a specific gate line GL is opened by the gate driver circuit GDC, the data driver circuit DDC converts the video data signal received from the display controller DCTR into an analog signal, and supplies a corresponding data signal Vdata to a plurality of data lines DL.

[0025] The display controller DCTR may be a timing controller used in ordinary display technology, or it may be a control device that further executes other control functions including the timing controller, or it may be a control device different from the timing controller.

[0026] The display controller DCTR may be realized as a separate component from the data driving circuit DDC, or may be realized in an integrated circuit together with the data driving circuit DDC.

[0027] The data driving circuit DDC drives a plurality of data lines DL by supplying a data signal Vdata to the plurality of data lines DL. Here, the data driving circuit DDC is also called a "source driver".

[0028] Such a data driving circuit DDC can include at least one source driver integrated circuit (SDIC). Each source driver integrated circuit SDIC can include a shift register, a latch circuit, a digital-to-analog converter (DAC), an output buffer circuit, etc. Each source driver integrated circuit SDIC can further include an analog-to-digital converter (ADC) in some cases.

[0029] Each source driver integrated circuit SDIC can be connected to the bonding pads of the display panel DISP by means of tape automated bonding (TAB) or chip on glass (COG), or can be directly arranged on the display panel DISP. In some cases, it may also be integrated and arranged on the display panel DISP. In addition, each source driver integrated circuit SDIC can also be realized by the chip on film (COF) method in which chips are mounted on a film connected to the display panel DISP.

[0030] The gate drive circuit GDC drives a plurality of gate lines GL by supplying a scan signal (also referred to as Vgate, scan voltage, scan signal, or gate voltage) to the plurality of gate lines GL. Here, the gate drive circuit GDC is also referred to as a "scan driver".

[0031] Here, the scan signal Vgate can be composed of an off-level gate voltage for closing the gate line GL and an on-level gate voltage for opening the gate line GL.

[0032] More specifically, the scan signal Vgate can be composed of an off-level gate voltage for turning off the transistor connected to the gate line GL and an on-level gate voltage for turning on the transistor connected to the gate line GL.

[0033] When the transistor is of the N type, the off-level gate voltage can be the low-level gate voltage VGL, and the on-level gate voltage can be the high-level gate voltage VGH. When the transistor is of the P type, the off-level gate voltage can be the high-level gate voltage VGH, and the on-level gate voltage can be the low-level gate voltage VGL. Hereinafter, for the convenience of explanation, it is exemplified that the off-level gate voltage is the low-level gate voltage VGL and the on-level gate voltage is the high-level gate voltage VGH.

[0034] Such a gate driving circuit GDC can include at least one gate driver integrated circuit (GDIC). Each gate driver integrated circuit GDIC can include a shift register, a level shifter, and the like.

[0035] Each gate driver integrated circuit GDIC can be connected to the bonding pads of the display panel DISP in a tape automated bonding (TAB) method or a chip on glass (COG) method, or can be implemented in a gate in panel (GIP) type and directly arranged on the display panel DISP. In some cases, it can also be integrated and arranged on the display panel DISP. Also, each gate driver integrated circuit GDIC can be implemented in a chip on film (COF) method mounted on a film connected to the display panel DISP.

[0036] Similar to FIG. 1, the data driving circuit DDC may be located only on one side (e.g., the upper side or the lower side) of the display panel DISP. In some cases, depending on the driving method, panel design method, etc., it may be located on both sides (e.g., the upper side and the lower side) of the display panel DISP.

[0037] Similar to FIG. 1, the gate driving circuit GDC may be located only on one side (e.g., the left side or the right side) of the display panel DISP. In some cases, depending on the driving method, panel design method, etc., it may be located on both sides (e.g., the left side and the right side) of the display panel DISP.

[0038] The touch display device 100 according to the embodiments of the present disclosure may be various types of display devices such as a liquid crystal display device, an organic light emitting display device, etc. The display panel DISP according to the embodiments of the present disclosure can also be various types of display panels such as a liquid crystal display panel, an organic light emitting display panel, etc.

[0039] Each sub-pixel SP located in the display panel DISP can be configured to include one or more circuit elements (e.g., transistors, capacitors, etc.).

[0040] For example, when the display panel DISP is a liquid crystal display panel, a pixel electrode can be arranged in each sub-pixel SP, and a transistor can be electrically connected between the pixel electrode and the data line DL. The transistor is turned on by a scan signal Vgate supplied to the gate node via the gate line GL, and when turned on, outputs a data signal Vdata supplied to the source node (or drain node) via the data line DL to the drain node (or source node). The transistor can apply the data signal Vdata to the pixel electrode electrically connected to the drain node (or source node). An electric field is formed between the pixel electrode to which the data signal Vdata is applied and the common electrode to which the common voltage Vcom is applied, and a capacitance can be formed between the pixel electrode and the common electrode.

[0041] The structure of each sub-pixel SP is variously determined according to the panel type, provided functions, design method, etc.

[0042] Referring to FIGS. 1 and 3, the touch display device 100 according to the embodiment of the present disclosure can include a touch panel TSP, a touch drive circuit TDC that drives and senses the touch panel TSP, a touch controller TCTR that detects the presence or absence of a touch and / or the coordinates of the touch by using the result of the touch drive circuit TDC sensing the touch panel TSP, etc. in order to provide a touch sensing function.

[0043] The touch panel TSP can be touched or approached by a user's pointer. A touch sensor can be arranged in such a touch panel TSP.

[0044] Here, the user's pointer can be a finger or a pen, etc.

[0045] The pen can be a passive pen without a signal transmission / reception function or an active pen with a signal transmission / reception function. The touch drive circuit TDC can supply a touch drive signal to the touch panel TSP and sense the touch panel TSP. The touch controller TCTR can sense a touch using the result of the touch drive circuit TDC sensing the touch panel TSP. Here, sensing a touch can mean detecting the presence or absence of a touch and / or the coordinates of the touch.

[0046] The touch panel TSP may be an external type disposed outside the display panel DISP or an internal type disposed inside the display panel DISP.

[0047] When the touch panel TSP is of the external type, the touch panel TSP and the display panel DISP can be bonded together with an adhesive or the like after being separately manufactured. The external touch panel TSP is also called an add-on type.

[0048] When the touch panel TSP is of the internal type, the touch panel TSP can be manufactured together during the process of manufacturing the display panel DISP. That is, the touch sensors constituting the touch panel TSP can be disposed inside the display panel DISP. The internal touch panel TSP can be of the in-cell type, on-cell type, hybrid type, etc.

[0049] On the other hand, hereinafter, for the sake of convenience of explanation, it is assumed that the touch panel TSP is an internal type incorporated inside the display panel DISP.

[0050] When a touch panel TSP is incorporated into a display panel DISP, that is, when a plurality of touch electrodes TE are arranged on the display panel DISP, a plurality of touch electrodes TE may be configured on the display panel DISP separately from the electrodes used for display driving, and the electrodes arranged on the display panel DISP for display driving can also be utilized as the plurality of touch electrodes TE.

[0051] For example, a plurality of common electrodes arranged on the display panel DISP can be divided into a plurality of parts and also utilized as the plurality of touch electrodes TE. That is, the plurality of touch electrodes TE arranged on the display panel DISP can be electrodes for touch sensing while also being electrodes for display driving. Hereinafter, it is assumed that the plurality of touch electrodes TE arranged on the display panel DISP are common electrodes.

[0052] As an example, the touch controller TCTR can be implemented by a micro control unit (MCU), a processor, or the like.

[0053] The display controller DCTR and the touch controller TCTR may be implemented separately or may be integrated.

[0054] Referring to FIG. 3, on the touch panel TSP of the touch display device 100 according to the embodiment of the present disclosure, a plurality of touch electrodes TE and a plurality of touch lines TL configured to electrically connect the plurality of touch electrodes TE and the touch driving circuit TDC can be located. The plurality of touch electrodes TE can be arranged in a matrix. Each of the plurality of touch electrodes TE can be electrically connected via one or more touch lines TL and one or more contact holes.

[0055] According to an embodiment of the present disclosure, the touch display device 100 can sense a touch based on the self-capacitance of the touch electrode TE or sense a touch based on the mutual-capacitance between the touch electrodes TE.

[0056] When the touch display device 100 according to an embodiment of the present disclosure senses a touch based on self-capacitance, a plurality of first touch electrode lines and a plurality of second touch electrode lines may be arranged to cross each other on the touch panel TSP. For example, the plurality of first touch electrode lines may be arranged in the X-axis direction, and the plurality of second touch electrode lines may be arranged in the Y-axis direction. Here, each of the first touch electrode line and the second touch electrode line may be one touch electrode in the form of a bar, or may be in a form in which two or more touch electrodes are electrically connected. The first touch electrode line can be referred to as a driving line, a driving electrode, a driving touch electrode line, a Tx line, a Tx electrode, or a Tx touch electrode line, etc. The second touch electrode line can be referred to as a receiving line, a receiving electrode, a receiving touch electrode line, a sensing line, a sensing electrode, a sensing touch electrode line, an Rx line, an Rx electrode, or an Rx touch electrode line, etc.

[0057] In this case, the touch driving circuit TDC supplies a driving signal to one or more of the plurality of first touch electrode lines, senses the second touch electrode lines, and outputs sensing data, and the touch controller TCTR can calculate the presence or absence of a touch and / or the coordinates of the touch using the sensing data.

[0058] When the touch display device 100 according to an embodiment of the present disclosure senses a touch based on mutual-capacitance, as shown in FIG. 3, a plurality of touch electrodes TE may be arranged in a separated form from each other on the touch panel TSP.

[0059] In this case, the touch drive circuit TDC supplies a drive signal (hereinafter referred to as a touch electrode drive signal TDS) to all or part of a plurality of touch electrodes TE, senses one or more touch electrodes TE to which the drive signal is supplied, outputs sensing data, and the touch controller TCTR can calculate the presence or absence of a touch and / or the coordinates of the touch using the sensing data.

[0060] Hereinafter, for convenience of explanation, it is assumed that the touch display device according to the embodiment of the present disclosure senses a touch based on self-capacitance, and it is assumed that the touch panel TSP is configured as shown in FIGS. 2 and 3.

[0061] The touch electrode drive signal TDS output from the touch drive circuit TDC may be a signal having a constant voltage or a signal whose voltage is changed.

[0062] When the touch electrode drive signal TDS is a signal with variable voltage, the touch electrode drive signal TDS can be in the form of various signal waves, such as a sine wave, a triangular wave, or a rectangular wave, for example.

[0063] Hereinafter, when the touch electrode drive signal TDS is a signal with variable voltage, it is assumed that the touch electrode drive signal TDS is a pulse signal composed of a plurality of pulses. When the touch electrode drive signal TDS is a pulse signal composed of a plurality of pulses, it may have a constant frequency or a variable frequency.

[0064] Referring to FIGS. 2 and 3, the size of the area occupied by one touch electrode TE may correspond to the size of the area occupied by one sub-pixel SP, or may correspond to the size of the area occupied by two or more sub-pixels SP. That is, each of the plurality of touch electrodes TE may overlap with two or more sub-pixels SP.

[0065] A plurality of touch electrodes TE are arranged in a matrix. Among the plurality of touch electrodes TE, if a first touch electrode and a second touch electrode are arranged in the same column (or the same row), then two or more data lines DL overlapping with the first touch electrode may overlap with the second touch electrode. Two or more gate lines GL overlapping with the first touch electrode may not overlap with the second touch electrode.

[0066] Columns (or rows of touch electrodes) of the plurality of touch electrodes may be arranged parallel to the plurality of data lines DL. The plurality of touch lines TL may be arranged parallel to the plurality of data lines DL.

[0067] A plurality of touch electrodes TE are arranged in one column (or row of touch electrodes), and the plurality of touch lines TL electrically connected to the plurality of touch electrodes TE may overlap with the plurality of touch electrodes.

[0068] For example, assume that a plurality of touch electrodes TE arranged in one column of touch electrodes include a first touch electrode and a second touch electrode, a first touch line electrically connects the first touch electrode and a touch drive circuit TDC, and a second touch line electrically connects the second touch electrode and the touch drive circuit TDC. In this case, although the first touch line electrically connected to the first touch electrode overlaps with the second touch electrode (a touch electrode arranged in the same column as the first touch electrode), within the display panel DISP, it can be electrically insulated (separated) from the second touch electrode. On the other hand, the first touch line and the second touch line may be short-circuited inside the touch drive circuit TDC depending on the driving situation and requirements.

[0069] FIG. 4 is a diagram simply showing a touch sensing method using the self-capacitance method.

[0070] Referring to FIG. 4, the touch display device according to the embodiment of the present specification can include a first substrate SUB1 and a second substrate SUB2. On the first substrate SUB1 and the second substrate SUB2, a polarizing plate POL and a cover window (CW) can be further located.

[0071] On the first substrate SUB1, a plurality of data lines DL and a plurality of gate lines GL are located. Such a first substrate SUB1 is also called a thin film transistor substrate.

[0072] On the second substrate SUB2, a color filter layer CF including a color filter and a light shielding layer 410 for partitioning a plurality of sub-pixels may be disposed. Such a second substrate SUB2 is also called a color filter substrate. The color filter substrate can be attached to the array substrate. Liquid crystal (LC) can be filled between the array substrate and the color filter substrate.

[0073] On the other hand, referring to FIG. 4, a plurality of touch electrodes TE for touch sensing are located on the plurality of data lines DL and the plurality of gate lines GL.

[0074] A touch electrode drive signal TDS is applied to at least one touch electrode TE among the plurality of touch electrodes TE. As described above, the touch drive circuit can supply the touch electrode drive signal to all or part of the plurality of touch electrodes TE, sense one or more touch electrodes TE to which the touch electrode drive signal TDS is supplied, and output sensing data.

[0075] When a pointer including a human finger touches or approaches the surface of the touch display device, the capacitance value formed in the touch electrode TE changes from the initial value.

[0076] For example, referring to FIG. 4, when a finger touches the cover window CW of the touch display device, a predetermined capacitance Cf is formed between the touch electrode TE and the finger. The touch drive circuit can sense the touch electrode TE and output sensing data to determine the presence or absence of a touch and / or the position where the touch occurs.

[0077] On the other hand, in order to improve the accuracy of touch sensing, an insulator with a high resistance value can be disposed on the touch electrode TE and the cover window CW. Thereby, the capacitance Cf value formed in the touch electrode TE can be increased. Thereby, the accuracy of touch sensing can be improved.

[0078] Referring to FIG. 4, the insulator with a high resistance value can be a high-resistance polarizing plate POL.

[0079] In some cases, a high-resistance oxide film 420 may be further disposed between the touch electrode TE and the cover window CW. The high-resistance oxide film 420 can be applied to the upper surface of the second substrate SUB2. The upper surface of the second substrate SUB2 can mean the surface opposite to the surface where the color filter layer CF is located in the second substrate SUB2. The resistance value of the oxide film 420 can be at the level of about 10^6.5 to 10^8.5 Ω (ohm).

[0080] By applying a high-resistance oxide film to the upper surface of the second substrate SUB2, it is possible to use a polarizing plate POL with a low resistance value.

[0081] According to this, one or more insulating substances can be located between the touch electrode TE and the cover window CW.

[0082] Referring to FIG. 4, one or more of liquid crystal LC, light-shielding layer 410, high-resistance oxide film 420, and polarizing plate POL can be located between the touch electrode TE and the cover window CW.

[0083] As an example, the dielectric constant of the liquid crystal LC can be about 8.7 (F / m). The dielectric constant of the light shielding layer 410 can be about 4 (F / m).

[0084] On the other hand, at least one touch electrode TE to which the touch electrode driving signal TDS is applied can form a parasitic capacitance Cp between the peripheral electrodes and the peripheral wirings.

[0085] Referring to FIG. 4, at least one touch electrode TE to which the touch electrode driving signal TDS is applied can form a touch electrode parasitic capacitance Cp(T) between one or more touch electrodes TE located peripherally. At least one touch electrode TE to which the touch electrode driving signal TDS is applied can form a data line parasitic capacitance Cp(D) between one or more data lines DL located peripherally. At least one touch electrode TE to which the touch electrode driving signal TDS is applied can form a gate line parasitic capacitance Cp(G) between one or more gate lines GL located peripherally.

[0086] FIGS. 5 and 6 are diagrams for explaining the time division driving (TDD: Time Division Driving) method of the touch display device according to an embodiment of the present disclosure.

[0087] Referring to FIG. 5, the touch display device according to an embodiment of the present disclosure can alternately execute display and touch sensing. In this way, the display driving for display and the touch driving for touch sensing proceed alternately, which is called the time division driving method.

[0088] According to such a time division driving method, the display period for display and the touch sensing period for touch sensing alternate. During the display period, the touch display device can execute display driving. During the touch sensing period, the touch display device can execute touch driving.

[0089] As an example of the time-division driving method, one frame period can be divided into one display period and one touch sensing period. As another example of the time-division method, one frame period can be divided into two or more display periods ("Display" in the figure) and one or two or more touch sensing periods ("Touch Sensing" in the figure).

[0090] Referring to FIG. 5, according to the time-division driving method, during the touch sensing period ("Touch Sensing" in FIG. 5), a touch electrode driving signal TDS can be applied to one or more of the plurality of touch electrodes TE. At this time, the plurality of data lines DL and the plurality of gate lines GL may not be driven.

[0091] In such a case, an unnecessary parasitic capacitance due to a potential difference may be formed between the touch electrode TE to which the touch electrode driving signal TDS is applied and one or more data lines DL located around it. This unnecessary parasitic capacitance may increase the RC delay (RC Delay) with respect to the touch electrode TE and the touch line TL connected thereto, and may reduce the touch sensitivity.

[0092] Also, an unnecessary parasitic capacitance due to a potential difference may be formed between the touch electrode TE to which the touch electrode driving signal TDS is applied and one or more gate lines GL located around it. This unnecessary parasitic capacitance may increase the RC delay with respect to the touch electrode TE and the touch line TL connected thereto, and may reduce the touch sensitivity.

[0093] Note that an unnecessary parasitic capacitance due to a potential difference may also be formed between the touch electrode TE to which the touch electrode driving signal TDS is applied and one or more other touch electrodes TE located around it.

[0094] This unnecessary parasitic capacitance may increase the RC delay with respect to the touch electrode TE and the touch line TL connected thereto, and may reduce the touch sensitivity.

[0095] The aforementioned RC delay is also called a time constant and is also called a load.

[0096] To remove such a load, a touch display device according to an embodiment of the present disclosure can perform load-free driving (LFD: Load Free Driving) during a touch sensing period.

[0097] When a touch electrode driving signal TDS is applied to all or part of a plurality of touch electrodes TE during load-free driving, a touch display device according to an embodiment of the present disclosure may apply a load-free driving signal as a data signal Vdata to all data lines DL or some data lines DL where parasitic capacitance may be formed.

[0098] When a touch electrode driving signal TDS is applied to all or part of a plurality of touch electrodes TE during load-free driving, a touch display device according to an embodiment of the present disclosure may apply a load-free driving signal as a scan signal Vgate to all gate lines GL or some gate lines GL where parasitic capacitance may be formed.

[0099] When a touch electrode driving signal TDS is applied to a part of a plurality of touch electrodes TE during load-free driving, a touch display device according to an embodiment of the present disclosure may apply a load-free driving signal to all other touch electrodes TE or some other touch electrodes TE where parasitic capacitance may be formed.

[0100] The aforementioned Load Free Driving Signal may be a touch electrode driving signal, or a signal having the same or similar signal characteristics as the touch electrode driving signal. For example, the frequency and phase of the aforementioned Load Free Driving Signal may be the same as the frequency and phase of the touch electrode driving signal TDS, or may be the same within a predetermined error range. And, the amplitude of the Load Free Driving Signal and the amplitude of the touch electrode driving signal TDS may be the same, or may be the same within a predetermined error range, and in some cases, there may be an intentional difference.

[0101] FIG. 7 is a diagram for explaining the Time Free Driving (TFD) method of a touch display device according to an embodiment of the present disclosure.

[0102] Referring to FIG. 7, a touch display device according to an embodiment of the present disclosure can independently execute display and touch sensing. In this way, a driving method that independently performs display driving and touch driving for touch sensing is called a time free driving method.

[0103] According to such a time free driving method, the display driving for the display and the touch driving for touch sensing may proceed simultaneously. Further, during an arbitrary period, only the display driving for the display may proceed, or only the touch driving for touch sensing may proceed.

[0104] FIG. 8 is a diagram showing three cases (Case1, 2, 3) of time free driving when a touch display device according to an embodiment of the present disclosure performs time free driving, and FIG. 9 is a diagram showing touch electrode driving signals TDS for the three cases (Case1, 2, 3) of time free driving of a touch display device according to an embodiment of the present disclosure.

[0105] According to Case 1 of the time-free drive, the touch display device can perform display drive and touch drive simultaneously. In this case, while the data drive circuit DDC supplies data signals Vdata for video display to a plurality of data lines DL and the display drive proceeds, the touch drive circuit TDC can sense at least one of the plurality of touch electrodes TE.

[0106] In Case 1, the touch display device can supply a touch electrode drive signal TDS in a form with a changing voltage to the touch electrode TE to perform touch drive.

[0107] Hereinafter, in Case 1, the touch electrode drive signal TDS applied to the touch electrode TE is referred to as a first touch electrode drive signal TDS1. This first touch electrode drive signal TDS1 has a first amplitude AMP1.

[0108] In Case 1, the touch display device can perform touch drive and sense a touch caused by a finger contact on the touch panel TSP. Such touch sensing is called Finger Sensing.

[0109] Or, in Case 1, the touch display device can perform touch drive and sense a touch by a finger or a pen when the finger or the pen is close to the touch panel TSP without contacting the touch panel TSP. Such touch sensing is called Hover Sensing.

[0110] According to Case 2 of the time-free drive, the touch display device can perform only display drive.

[0111] In Case 2, since the touch display device does not need to sense touches with a finger, it does not perform general touch driving. That is, the touch display device does not supply a touch electrode driving signal TDS in a form in which the voltage changes to a plurality of touch electrodes TE arranged on the touch panel TSP.

[0112] In Case 2, the touch display device can supply a touch electrode driving signal TDS in the form of a DC voltage. Hereinafter, in Case 2, the touch electrode driving signal TDS applied to the touch electrode TE is referred to as a second touch electrode driving signal TDS2.

[0113] On the other hand, in Case 2, the touch display device can receive the pen signal output from the pen Pen via the touch electrode TE and sense the pen. As a result of pen sensing, the touch display device can grasp the position, tilt, pressure (pen pressure), or various additional information of the pen.

[0114] According to Case 3 of time-free driving, the touch display device may perform only touch driving.

[0115] In Case 3, in order to perform touch driving, the touch display device can supply a touch electrode driving signal TDS in a voltage-variable form to the touch electrode TE.

[0116] Hereinafter, in Case 3, the touch electrode driving signal TDS applied to the touch electrode TE is referred to as a third touch electrode driving signal TDS3. This third touch electrode driving signal TDS3 has a third amplitude AMP3 different from the first amplitude AMP1.

[0117] In Case 3, the touch display device performs touch driving and can sense touches due to finger contact on the touch panel TSP.

[0118] Referring to FIG. 8, in the touch display device, among the three cases (Case1, 2, 3) of time-free driving, Case 1 can proceed to the active time, and Case 3 can proceed to the blank time. Here, the active time corresponds to the time when one frame of the screen is displayed, and the blank time can correspond to the time required from when one frame of the screen is displayed until the next frame of the screen starts to be displayed.

[0119] Referring to FIG. 8, during the active time, Case 1 can be changed to Case 2.

[0120] Referring to FIG. 8, during the active time, while the touch display device is executing both display driving and touch driving (while in Case 1), for pen sensing, the touch driving for finger sensing can be interrupted (that is, changed from Case 1 to Case 2).

[0121] In Case 1 and 3, during touch driving for finger sensing, touch electrode drive signals TDS1, TDS3 having amplitudes AMP1, AMP3 can be applied to the touch electrode TE.

[0122] On the other hand, referring to FIG. 9, when touch driving is performed together with display driving (Case1), the first amplitude AMP1 of the first touch electrode drive signal TDS1 applied to the touch electrode TE may be smaller than the third amplitude AMP3 of the third touch electrode drive signal TDS3 applied to the touch electrode TE when only touch driving is performed (Case3).

[0123] During the active time, the first amplitude AMP1 of the first touch electrode drive signal TDS1 applied to the touch electrode TE may be smaller than the third amplitude (AMP3) of the third touch electrode drive signal TDS3 applied to the touch electrode TE during the blank time.

[0124] Referring to FIG. 8, during the active time, the touch drive circuit TDC can supply a first touch electrode drive signal TDS1 having a first amplitude AMP1 or a second touch electrode drive signal TDS2 corresponding to a DC voltage to a plurality of touch electrodes TE.

[0125] Referring to FIG. 8, during the blank time, the touch drive circuit TDC can supply a third touch electrode drive signal TDS3 having a third amplitude AMP3 to one or more of the plurality of touch electrodes TE.

[0126] On the other hand, the driving corresponding to Case 1 may proceed within one frame or only within a partial time interval within one frame. The driving corresponding to Case 2 may proceed in all frames or some frames, or may proceed only within a partial time interval within a frame. During the driving corresponding to Case 3, the driving for finger sensing may proceed, or the driving for pen sensing may proceed.

[0127] FIG. 10 is a diagram collectively showing waveforms of main signals (TDS1, TDS2, TDS3, Vdata, VGL_M, VGH_M) for three cases (Case1, 2, 3) of time-free driving in a touch display device according to an embodiment of the present disclosure.

[0128] Case 1 and Case 2 are driving cases during the active time. Case 3 is a driving case during the blank time.

[0129] For each of the three cases, look at the off-level gate voltage VGL and the on-level gate voltage VGH supplied to the gate drive circuit GDC to generate a touch electrode drive signal TDS applied to the touch electrode TE, a data signal Vdata supplied to the data line DL, and a scan signal Vgate supplied to the gate line GL.

[0130] In the case of Case 2 where only display driving proceeds during the active time, the touch electrode driving signal TDS applied to the touch electrode TE is the second touch electrode driving signal TDS2 in the form of a DC voltage.

[0131] The data signal Vdata applied to the data line DL is a signal corresponding to the video analog signal obtained by digital-to-analog conversion of the video signal for the display, and may be the pixel voltage applied to the pixel electrode of the sub-pixel SP via the data line DL. However, the data signal Vdata may have a voltage fluctuation between the driving voltage AVDD and the base voltage AVSS.

[0132] Each of the off-level gate voltage VGL forming the scan signal Vgate applied to the gate line GL and the on-level gate voltage VGH is a corresponding DC voltage.

[0133] As described above, the touch electrode TE can also function as a common electrode for display driving. Therefore, in Case 2 where only display driving proceeds during the active time, the second touch electrode driving signal TDS2 applied to the touch electrode TE corresponds to the common voltage for the display.

[0134] Thereby, due to the voltage difference between the data signal Vdata applied to the pixel electrode via the data line DL in the corresponding sub-pixel SP and the second touch electrode driving signal TDS2 corresponding to the common voltage applied to the touch electrode TE, an electric field is formed between the pixel electrode and the touch electrode TE, and in the sub-pixel SP, desired light can be emitted.

[0135] In the case of Case 3 where only touch driving proceeds during the blank time, the touch electrode driving signal TDS applied to the touch electrode TE is the third touch electrode driving signal TDS3 having the third amplitude AMP3.

[0136] During the blank time, the data line DL may have a data signal Vdata corresponding to a DC voltage applied thereto, or may be in a floating state. During the blank time, the gate line GL may have a scan signal Vgate consisting of an off-level gate voltage VGL corresponding to a DC voltage applied thereto, or may be in an electrically floating state.

[0137] When load-free driving is performed during the blank time when only touch driving is in progress, from the viewpoint of voltage characteristics, the data line DL and the gate line GL may fluctuate in the same manner as the touch electrode TE.

[0138] In response to the load-free driving, during the blank time, the data signal Vdata applied to the data line DL may be the third touch electrode driving signal TDS3, or may be a load-free driving signal having the same or similar signal characteristics (e.g., phase, frequency, amplitude, etc.) as the third touch electrode driving signal TDS3.

[0139] Also, in response to the load-free driving, during the blank time, the off-level gate voltage VGL applied to the gate line GL may be the third touch electrode driving signal TDS3, or may be a load-free driving signal having the same or similar signal characteristics (e.g., phase, frequency, amplitude, etc.) as the third touch electrode driving signal TDS3.

[0140] In the case of Case 1 where display driving and touch driving are performed simultaneously during the active time, the touch electrode driving signal TDS applied to the touch electrode TE is the first touch electrode driving signal TDS1 having the first amplitude AMP1.

[0141] In the case of Case 1, since display driving and touch driving are performed simultaneously during the active time, the first touch electrode driving signal TDS1 is both a touch electrode driving signal for touch sensing and a display common voltage Vcom for forming a capacitance with the data signal Vdata.

[0142] The first touch electrode driving signal TDS1 applied to the touch electrode TE is also the data signal Vdata corresponding to the pixel voltage for the display and the display common voltage Vcom for forming the capacitance.

[0143] The first touch electrode driving signal TDS1 applied to the touch electrode TE has a data signal Vdata corresponding to the pixel voltage for the display and a predetermined voltage difference for the display.

[0144] In Case 1 where display driving and touch driving proceed simultaneously, the first touch electrode driving signal TDS1 comes to perform two functions (a driving signal for touch sensing and a common voltage for the display).

[0145] Thus, since the common voltage Vcom corresponding to the first touch electrode driving signal TDS1 is not a constant voltage but a voltage variable, in order that the data line DL is not affected by the touch driving, the data signal Vdata applied to the data line DL should have additional voltage fluctuations by an amount equal to the first amplitude AMP1 of the first touch electrode driving signal TDS1 in addition to the original voltage fluctuations for the display.

[0146] In this case, in the voltage difference between the data signal Vdata corresponding to the pixel voltage and the first touch electrode driving signal TDS1 corresponding to the common voltage Vcom, the voltage fluctuation portion of the first touch electrode driving signal TDS1 (i.e., the first amplitude AMP1) is excluded and only the original voltage fluctuations for the display exist. Thereby, normal display may be enabled.

[0147] Therefore, the data signal Vdata in Case 1 where display driving and touch driving proceed simultaneously may be a signal in a combined form of the data signal Vdata when only display driving proceeds (Case 2) and the first touch electrode driving signal TDS1.

[0148] That is, the data signal Vdata in Case 1 where display driving and touch driving proceed simultaneously can be a signal in a form where the original data signal Vdata in the case where only display driving proceeds (Case 2) is offset by the first touch electrode driving signal TDS1. However, the data signal Vdata may have a voltage fluctuation between the driving voltage AVDD and the base voltage AVSS.

[0149] Therefore, the voltage difference between the data signal Vdata in Case 1 where touch driving and display driving proceed simultaneously and the first touch electrode driving signal TDS1 is equal to the voltage difference between the data signal Vdata in Case 2 where only display driving proceeds and the second touch electrode driving signal TDS2.

[0150] In the case of Case 1, since touch driving and display driving proceed simultaneously, load-free driving may be required.

[0151] That is, in the case of Case 1, since touch driving and display driving proceed simultaneously, it may be necessary to prevent the formation of parasitic capacitance between the touch electrode TE and the data line DL due to touch driving, and to prevent the formation of parasitic capacitance between the touch electrode TE and the gate line GL due to touch driving.

[0152] As described above, in the case of Case 1, since the touch electrode TE and the data line DL sway according to the voltage fluctuation of the first touch electrode driving signal TDS1, there is only a voltage difference for display between the touch electrode TE and the data line DL, and unnecessary parasitic capacitance due to touch driving is not formed. That is, in the case of Case 1, load-free driving for the data line DL proceeds.

[0153] In the case of Case 1, for the gate driving circuit GDC to generate the scan signal Vgate applied to the gate line GL, each of the off-level gate voltage VGL and the on-level gate voltage VGH supplied to the gate driving circuit GDC may be a load-free driving signal having the same or similar signal characteristics (e.g., phase, frequency, amplitude, etc.) as the third touch electrode driving signal TDS3.

[0154] In the case of Case 1, the data signal Vdata may be a signal modulated based on the first touch electrode driving signal TDS1. The scan signal Vgate may be a signal modulated based on the first touch electrode driving signal TDS1.

[0155] Hereinafter, the time-free driving of the touch display device according to the above-described embodiment of the present disclosure will be described in detail.

[0156] FIG. 11 is a diagram showing a time-free driving system of a touch display device according to an embodiment of the present disclosure.

[0157] Referring to FIG. 11, a touch display device according to an embodiment of the present disclosure includes a display panel DISP in which a plurality of data lines DL and a plurality of gate lines GL are located and a plurality of touch electrodes TE are located, a gate driving circuit GDC electrically connected to the plurality of gate lines GL and configured to drive the plurality of gate lines GL, a data driving circuit DDC electrically connected to the plurality of data lines DL and configured to drive the plurality of data lines DL, a touch driving circuit (TDC: Touch Driving Circuit) electrically connected to the plurality of touch electrodes TE and configured to drive the plurality of touch electrodes TE, and the like.

[0158] In addition, the touch display device according to the embodiment of the present disclosure may further include a display controller DCTR that controls the driving operations of the data driving circuit DDC and the gate driving circuit GDC, and a touch controller (TCTR: Touch Controller) that controls the driving operation of the touch driving circuit TDC or calculates the presence or absence of a touch and / or the coordinates of the touch using the sensing data output from the touch driving circuit TDC.

[0159] In addition, the touch display device according to the embodiment of the present disclosure may further include a power control circuit for power supply. Such a power control circuit may include a touch power circuit (TPIC: Touch Power Integrated Circuit), a power management circuit (PMIC: Power Management Integrated Circuit), and the like.

[0160] The touch power circuit TPIC can supply a touch electrode drive signal TDS required for driving the touch electrode TE to the touch drive circuit TDC.

[0161] Based on the modulation signal (e.g., pulse width modulation signal) received from the touch controller TCTR, the touch drive circuit TDC can supply touch electrode drive signals TDS1 and TDS3 for touch sensing to the touch electrodes TE to be sensed among the plurality of touch electrodes TE. Then, the touch power circuit TPIC can also supply the modulation signal (e.g., pulse width modulation signal) received from the touch controller TCTR as a load-free drive signal to the touch electrodes TE that are not to be sensed among the many touch electrodes TE. Here, the touch electrode drive signals TDS1 and TDS3 applied to the touch electrodes TE to be sensed and the load-free drive signal (also referred to as a touch electrode drive signal) applied to the touch electrodes TE that are not to be sensed may be the same signal.

[0162] The power management integrated circuit (PMIC) can supply various voltages (such as AVDD, Vcom, VGH, VGL, etc.) required for signal supply of the touch power integrated circuit (TPIC) to the TPIC.

[0163] The PMIC can supply various DC voltages (such as AVDD, AVSS, etc.) required for data driving of the data driving circuit (DDC) to the DDC.

[0164] The touch controller (TCTR) can supply a pulse width modulation (PWM) signal for outputting or generating various signals (such as TDS, etc.) from circuits such as the TPIC, the touch driving circuit (TDC), or the DDC. Such a TCTR can be embodied by, for example, a micro control unit (MCU), a processor, etc.

[0165] The TPIC can modulate and output the common voltage Vcom input to the PMIC based on the PWM signal input to the TCTR. Thereby, the TPIC can generate and output a common voltage pulse with a modulated pulse width according to the voltage pulse corresponding to the PWM signal.

[0166] Moreover, the touch display device according to the embodiment of the present disclosure may further include one or more level shifters (L / S) for changing the voltage levels of various signals.

[0167] One or more such level shifters (L / S) may be implemented separately from a data driving circuit DDC, a gate driving circuit GDC, a touch driving circuit TDC, a touch power circuit TPIC, a power management circuit PMIC, a display controller DCTR, a touch controller TCTR, etc., or may be included as one or more internal modules among a data driving circuit DDC, a gate driving circuit GDC, a touch driving circuit TDC, a touch power circuit TPIC, a power management circuit PMIC, a display controller DCTR, a touch controller TCTR, etc.

[0168] Referring to FIG. 11, the data driving circuit DDC can include a gamma block GMA necessary for converting a video digital signal input from a display controller DCTR, etc. into a video analog signal.

[0169] Referring to FIG. 11, in a touch display device according to an embodiment of the present disclosure, a display panel DISP, a data driving circuit DDC, a gate driving circuit GDC, a touch driving circuit TDC, etc. can be grounded to a DC ground voltage GND.

[0170] FIG. 12 is a diagram schematically showing a touch display device 100 according to an embodiment of the present disclosure.

[0171] Referring to FIG. 12, a touch display device 100 according to an embodiment of the present disclosure includes a display panel DISP and includes a first driving circuit 1120 electrically connected to the display panel DISP.

[0172] The first driving circuit 1120 may be a circuit including the aforementioned data driving circuit DDC and the touch driving circuit TDC. Such a first driving circuit 1120 can execute the functions of the aforementioned source driver integrated circuit SDIC. The first driving circuit 1120 is also called an SRIC (Source driver Readout Integrated Circuit). The touch display device 100 can include one or more first driving circuits 1120.

[0173] The first driving circuit 1120 may be mounted on a substrate, or may be mounted on a circuit film or the like and electrically connected to the display panel DISP. As an example, the first driving circuit 1120 may be mounted on the circuit film 1122, and one side of the circuit film 1122 can be connected to a bonding pad (not shown) of the display panel DISP. Thereby, the first driving circuit 1120 and the display panel DISP can be electrically connected.

[0174] Referring to FIG. 12, the first driving circuit 1120 can supply a data signal Vdata to a plurality of data lines DL located in the display panel DISP. The first driving circuit 1120 can apply a common voltage Vcom to a plurality of touch electrodes TE located in the display panel DISP. During the touch sensing period, the first driving circuit 1120 can supply a touch electrode driving signal TDS to one or more of the plurality of touch electrodes TE located in the display panel DISP.

[0175] On the other hand, referring to FIG. 12, the touch display device 100 according to the embodiment of the present disclosure includes a second driving circuit 1130 electrically connected to the display panel DISP.

[0176] Such a second driving circuit 1130 may be a circuit including the aforementioned gate driving circuit GDC.

[0177] The second driving circuit 1130 may be mounted on a circuit film or may be mounted on a substrate. Referring to FIG. 12, the second driving circuit 1130 may be mounted on the circuit film 1132 as an example. The second driving circuit 1130 may be electrically connected to the bonding pads of the display panel DISP in a chip-on-film (COF) manner.

[0178] Referring to FIG. 12, a touch display device 100 according to an embodiment of the present disclosure may include at least one source printed circuit board (SPCB) 1110 necessary for circuit connection to a first drive circuit 1120. Further, a touch display device 100 according to an embodiment of the present disclosure may include a control printed circuit board (CPCB) 1140 configured to mount control components and various electronic devices.

[0179] In some cases, the first drive circuit 1120 may be mounted on at least one source printed circuit board 1110.

[0180] The at least one source printed circuit board 1110 and the control printed circuit board 1140 can be electrically connected via at least one connection member 1150.

[0181] A touch controller TCTR, a power management circuit PMIC, a display controller DCTR, and a touch power controller TPIC may be mounted on the control printed circuit board 1140.

[0182] Here, the at least one connection member 1150 may be a flexible printed circuit board (FPCB), or may be a flexible flat cable (FFC) or the like.

[0183] The at least one source printed circuit board 1110 and the control printed circuit board 1140 may be integrated and realized on one printed circuit board.

[0184] On the one hand, the display controller DCTR outputs a gate drive circuit control signal GCS, and this gate drive circuit control signal GCS is input to the second drive circuit 1130 via the bonding pads of the display panel DISP.

[0185] Referring to FIG. 12, the second drive circuit 1130 can receive the gate drive circuit control signal GCS input via the wiring located in the corner region (e.g., the X region in FIG. 12) of the display panel DISP. Alternatively, the second drive circuit 1130 may receive the gate drive circuit control signal GCS via the wiring located in the region between two different second drive circuits 1130 (e.g., the Y region in FIG. 12).

[0186] By the way, such a gate drive circuit control signal GCS is a signal output from the display controller DCTR and may be different from the signal output via the touch power controller TPIC.

[0187] That is, the touch power controller TPIC is supplied with a pulse width modulation PWM signal and can output a signal for the touch electrode drive signal TDS and / or the load-free drive LFD, and the signal output from the display controller DCTR is not a signal modulated according to the pulse width modulation PWM signal.

[0188] Therefore, there may be a problem that the accuracy of touch sensing decreases in the region where the wiring to which the signal output from the display controller DCTR is input is located.

[0189] Referring to FIG. 12, the region where the problem of decreased touch sensing accuracy occurs can include the region adjacent to the wiring to which the gate drive circuit control signal GCS is input. Such regions can include the region adjacent to the corner (e.g., the X region) of the display panel DISP and the region adjacent to the region between the bonding pads in the display panel DISP (e.g., the Y region).

[0190] Therefore, there is a need for a solution to improve the accuracy of touch sensing in this area.

[0191] FIG. 13 is an enlarged view of the X region of FIG. 12 in the touch display device 100 according to an embodiment of the present disclosure.

[0192] Referring to FIG. 13, the touch display device 100 according to an embodiment of the present disclosure may include a first wiring 1360 to which a gate drive circuit control signal GCS is applied, and a second wiring 1350 to which a signal with a modulated pulse width output from a touch power circuit TPIC is applied. Such a signal with a modulated pulse width may be, for example, a common voltage pulse with a modulated pulse width, or a display voltage pulse with a modulated pulse width.

[0193] The first wiring 1360 can be electrically connected to the first pin 1330 and the second pin 1340. The gate drive circuit control signal GCS input to the first pin 1330 is output to the second pin 1340 via the first wiring 1360.

[0194] On the other hand, referring to FIG. 13, the signal with a modulated pulse width may be transmitted via one first wiring 1360, or may be transmitted via a jumping pattern (not shown) formed on the first substrate SUB1. The jumping pattern can include one or more contact holes. The jumping pattern can be located in the LOG region 1370 on the first substrate SUB1.

[0195] The first pin 1330 and the second pin 1340 may be located at the bonding pads of the display panel DIPS. In some cases, the gate drive circuit can be arranged in a gate-in-panel type on the first substrate SUB1, and the signal input to the first pin 1330 can be transmitted to the gate drive circuit via the first wiring 1360. In this case, the second pin 1340 may be omitted.

[0196] With the aforementioned jumping pattern, a signal can be transmitted between two different gate driving circuits. For example, a signal with a modulated pulse width can be output from any one of the gate driving circuits arranged in the gate in-panel GIP type and transmitted through the jumping pattern when it is transmitted to another one of the gate driving circuits arranged in the gate in-panel GIP type.

[0197] Referring to FIGS. 12 and 13 together, a signal output from the display controller DCTR can be input to the first pin 1330. Alternatively, a signal output from the display controller DCTR can be input to the second pin 1340 and then output to another first pin 1330 through the second driving circuit 1130.

[0198] The signal applied to the first wiring 1360 can be, for example, any one of the gate driving circuit control signals GCS such as a gate start pulse GSP, a gate shift clock GSC, and a gate output enable signal GOE.

[0199] On the other hand, the second wiring 1350 is electrically connected to the third pin 1310 and the fourth pin 1320. The signal input to the third pin 1310 can be output to the fourth pin 1320 through the second wiring 1350.

[0200] A signal with a modulated pulse width output from the touch power circuit TPIC during a touch sensing period for touch sensing can be input to the second wiring 1350.

[0201] The touch power circuit TPIC can output a common voltage with a modulated pulse width according to a voltage pulse corresponding to a pulse width modulation PWM signal, and a common voltage pulse with a modulated pulse width can be applied to the second wiring 1350.

[0202] The common voltage pulse with a modulated pulse width is output from the fourth pin 1320. Such a signal output to the fourth pin 1320 can be input to the aforementioned second drive circuit 1130. The second drive circuit 1130 can output the common voltage pulse with a modulated pulse width to the third pin 1310.

[0203] On the other hand, the touch power circuit TPIC can output a display voltage pulse with a modulated pulse width according to the voltage pulse corresponding to the pulse width modulation PWM signal. Such a display voltage can include, for example, the off-level gate voltage VGL or the on-level gate voltage VGH.

[0204] According to this, the signal input to the second wiring 1350 may be a common voltage with a modulated pulse width or a display voltage pulse with a modulated pulse width.

[0205] Such a common voltage with a modulated pulse width may have the same or similar signal characteristics (such as phase, frequency, and amplitude) as the touch electrode drive signal TDS input to at least one of the plurality of touch electrodes TE during the touch sensing period.

[0206] Hereinafter, for convenience of explanation, it will be described assuming that the signal input to the second wiring 1350 is a common voltage with a modulated pulse width, but the present invention is not limited thereto.

[0207] Referring to FIG. 13, the first wiring 1360 and the second wiring 1350 can be arranged in the non-display area around the display area AA.

[0208] When the first substrate SUB1 is a glass substrate, the first wiring 1360 and the second wiring 1350 can be arranged in a Line On Glass (LOG) type. According to this, at least a part of the non-display area can be the LOG area 1370. The first wiring 1360 and the second wiring 1350 can be arranged in the LOG area 1370. The first pin 1330, the second pin 1340, the third pin 1310 or the fourth pin 1320 can be arranged in the LOG area 1370.

[0209] Referring to FIG. 13, the first wiring 1360 and the second wiring 1350 can be positioned adjacent to each other. The second wiring 1350 can be positioned closer to the display area AA than the first wiring 1360.

[0210] FIG. 14 is a diagram conceptually illustrating the parasitic capacitance formed in the touch electrode TE to which the touch electrode drive signal TDS is applied in the touch display device 100 according to an embodiment of the present disclosure.

[0211] Referring to FIG. 14, a parasitic capacitance Cpara can be formed between the touch electrodes TE to which the touch electrode drive signal TDS is applied and between the second wirings 1350 located around the touch electrodes TE. Also, a parasitic capacitance Cpara' can be formed between the touch electrodes TE to which the touch electrode drive signal TDS is applied and between the first wirings 1360 located around the touch electrodes TE.

[0212] Since a common voltage with a modulated pulse width can be applied to the second wiring 1350, the value of the parasitic capacitance Cpara between the touch electrodes TE to which the touch electrode drive signal TDS is applied is quite small.

[0213] However, the gate drive circuit control signal GCS is applied to the first wiring 1360, and since these signals are signals output from the display controller DCTR, they are not signals with modulated pulse widths. Therefore, there is an influence of the parasitic capacitance Cpara between the touch electrode TE to which the touch electrode drive signal TDS is applied and the first wiring 1360, and the parasitic capacitance Cpara may affect the touch sensing accuracy.

[0214] As a factor affecting the value of the parasitic capacitance Cpara' between the touch electrode TE and the first wiring 1360, there is an insulator included in the touch display device 100. These insulators can include, for example, the light shielding layer 410, the high-resistance oxide film 420, the liquid crystal LC, etc. And when the array substrate and the color filter substrate are joined together via a seal member, the seal member can also be a factor affecting the parasitic capacitance Cpara'.

[0215] Therefore, the touch display device according to the embodiment of the present disclosure arranges the second wiring 1350 over as wide an area as possible, and positions the aforementioned insulating substances between the first wiring 1350 and the touch electrode TE to be as few as possible, so that the touch sensing accuracy can be improved even at the outermost periphery of the display area.

[0216] FIG. 15 is a diagram showing that a wide wiring 1510 is located on the first substrate SUB1 in the touch display device according to the embodiment of the present disclosure.

[0217] Referring to FIG. 15, the wide wiring 1510 may be located on the first substrate SUB1, and such a wide wiring 1510 is included in the aforementioned second wiring 1350. In the same sense, the second wiring 1350 having a wide width can be the wide wiring 1510. Here, the second wiring 1350 having a wide width can be meant to have a wider width than the first wiring 1360. Hereinafter, it is assumed that the second wiring 1350 having a wide width means the wide wiring 1510, and the description will be made accordingly.

[0218] The wide wiring 1510 is electrically connected to the third pin 1310 and the fourth pin 1320, respectively. From the perspective of the wide wiring 1510, the voltage input via the third pin 1310 is output via the fourth pin 1320.

[0219] Each of the third pin 1310 and the fourth pin 1320 electrically connected to one wide wiring 1510 is electrically connected to a different second driving circuit 1130.

[0220] Referring to FIG. 15, the third pin 1310 and the fourth pin 1320 may be electrically connected to each other via a bypass circuit 1520.

[0221] Such a bypass circuit 1520 may mean one conducting wire located on the circuit film 1132. The bypass circuit 1520 can further include a level shifter for passing through the wide wiring 1510 and maintaining the amplitude of the common voltage pulse with a voltage drop.

[0222] The bypass circuit 1520 may be a circuit configured separately from the second driving circuit 1130, but the bypass circuit 1520 may be configured as one circuit with the second driving circuit 1130. In some cases, the bypass circuit 1520 may be located inside the gate driving circuit GDC. In this case, the third pin 1310 and the fourth pin 1320 may be electrically connected to the gate driving circuit GDC.

[0223] On the other hand, referring to FIG. 15, the touch display device according to the embodiment of the present disclosure may include a plurality of link lines LL configured to electrically connect the second driving circuit 1130 and a plurality of gate lines GL. These plurality of link lines LL may be located in the LOG region 1370.

[0224] Such a plurality of link lines LL may be arranged on the first substrate SUB1 in the shape of a triangular prism (Delta; Δ) that extends and spreads from the direction of the second drive circuit 1130 to the opposite side.

[0225] The wide wiring 1510 can be arranged in a region that does not overlap with the plurality of link lines LL. Such wide wiring 1510 can have a tapered V-shaped form. The wide wiring 1510 can have an inclined surface. The inclined surface may extend in a direction parallel to the link line LL adjacent to the wide wiring 1510 among the plurality of link lines LL. According to this, it may be possible to arrange the wide wiring 1510 most widely in a region where the plurality of link lines LL are not located.

[0226] In FIG. 15, the wide wiring 1510 is shown as having a triangular shape, but the shape of the wide wiring 1510 can have various shapes within a range that can fill a region where the plurality of link lines LL are not located. For example, the wide wiring 1510 may have a quadrangular or pentagonal shape.

[0227] The wide wiring 1510 may, for example, have a round shape with its apex portion adjusted so that the tip is not sharp. In this case, the phenomenon of increased charge density at the apex portion can be alleviated. According to this, the phenomenon of increased electric field at the apex portion can be alleviated. When the wide wiring 1510 has a polygonal shape with four or more apexes, the phenomenon of increased charge density at the apex portion can be further alleviated.

[0228] Hereinafter, the case where the shape of the wide wiring 1510 is triangular will be described as an example, but the shape of the wide wiring 1510 is not limited to this.

[0229] FIG. 16 is a diagram showing that the first wiring 1360 and the second wiring 1350 are located in a non-display region in the touch display device according to the embodiment of the present disclosure.

[0230] Here, the second wiring 1350 means a wiring to which a signal with a modulated pulse width is input in response to a pulse width modulation PWM signal, although it is not the wide wiring 1510. For example, during the touch sensing period, when a common voltage pulse with a modulated pulse width is applied to the wide wiring 1510, a display voltage (e.g., VGL, VGH, etc.) pulse with a modulated pulse width may be applied to the second wiring 1350. Alternatively, during the touch sensing period, when any one of the display voltage (e.g., VGL, VGH, etc.) pulses with a modulated pulse width is applied to the wide wiring 1510, a common voltage with a modulated pulse width may be applied to the second wiring 1350. In the present disclosure, the term "display signal" is used to comprehensively refer to both a display voltage with a modulated pulse width and a display voltage with an unmodulated pulse width.

[0231] Hereinafter, for convenience of explanation, it is assumed that a common voltage with a modulated pulse width is applied to the wide wiring 1510 during the sensing period, and the explanation will be given accordingly. And hereinafter, it is assumed that any one of the display voltage (e.g., VGL, VGH, etc.) pulses with a modulated pulse width is applied to the second wiring 1350 during the sensing period, and the explanation will be given accordingly. However, the touch display device according to the embodiment of the present disclosure is not limited thereto.

[0232] The width of the widest spreading portion of the wide wiring 1510 may be wider than the widths of the first wiring 1360 and the second wiring 1350. According to this, it can be said that the first wiring 1360 and the second wiring 1350 are narrow wirings compared to the wide wiring 1510.

[0233] Referring to FIG. 16, the wide wiring 1510 can be positioned adjacent to the first wiring 1360. And the wide wiring 1510 can be positioned adjacent to the second wiring 1350.

[0234] The wide wiring 1510 can be positioned closer to the touch electrode TE than the first wiring 1360 and the second wiring 1350.

[0235] The first wiring 1360 and the second wiring 1350 may extend in a side-by-side direction. The first wiring 1360 and the wide wiring 1510 may extend in a side-by-side direction. That is, the first wiring 1360, the second wiring 1350, and the wide wiring 1510 may be wirings that electrically connect two different second driving circuits. It can be said that these wirings extend from the direction of one of the second driving circuits to the direction of another adjacent second driving circuit.

[0236] Referring to FIG. 16, the first wiring 1360, the second wiring 1350, and the wide wiring 1510 can be located in the LOG region 1370 around the display region AA.

[0237] As a result, in the edge region of the touch display device, particularly in the region where a plurality of touch electrodes TE adjacent to the second driving circuit are located, the accuracy of touch sensing may be significantly improved.

[0238] FIGS. 17 to 21 are cross-sectional views taken along line I-I' of FIG. 16 in the touch display device according to the embodiment of the present disclosure.

[0239] Describing with reference to FIG. 17, it is as follows.

[0240] The touch display device according to the embodiment of the present disclosure can have a display region AA where a plurality of sub-pixels are located and a LOG region 1370 around the display region AA.

[0241] First, looking at the display region AA, on the first substrate SUB1, a metal layer M3 that supplies a common voltage Vcom or a touch electrode driving signal TDS is located on at least one touch electrode TE among the plurality of touch electrodes TE. Such a metal layer M3 may be covered with a first planarization layer PAC1.

[0242] A thin film transistor TR can be located on the first planarization layer PAC1. Such a thin film transistor TR may be arranged for each of the plurality of sub-pixels.

[0243] The thin-film transistor TR includes a gate electrode G electrically connected to any one of a plurality of gate lines GL, and an active layer ACT where the gate electrode G and the channel region overlap each other.

[0244] The thin-film transistor TR includes a source / drain electrode SD electrically connected to the active layer ACT. The source / drain electrode SD supplies a data signal input to any one of a plurality of data lines DL to the pixel electrode PXL.

[0245] The pixel electrode PXL can be located on a second planarization layer PAC2 covering the source / drain electrode SD.

[0246] On the other hand, referring to FIG. 17, the touch electrode TE and the pixel electrode PXL may be located in the same layer on the second planarization layer PAC2. The rotation angle of the liquid crystal LC can be adjusted according to the magnitude of the electric field formed between the touch electrode TE and the pixel electrode PXL. The light amount of the sub-pixel can be adjusted according to the rotation angle of the liquid crystal.

[0247] Such a liquid crystal LC can be located between a first substrate SUB1 and a second substrate SUB2. Specifically, the first substrate SUB1 and the second substrate SUB2 can be joined by a sealing member 1630, and the liquid crystal LC can be injected into a space formed by being joined by the sealing member 1630.

[0248] When the display device according to the embodiment of the present specification is an organic light-emitting display device including an organic light-emitting element, the display device may not include a liquid crystal, and the light amount of the sub-pixel can be adjusted according to the magnitude of the current flowing through the organic light-emitting element.

[0249] Hereinafter, the case where the display device according to the embodiment of the present specification is a liquid crystal display device will be described as a reference, but the present invention is not limited thereto.

[0250] A second substrate SUB2 is positioned at a position facing the first substrate SUB1. On one surface of the second substrate SUB2, a color filter layer CF including a color filter and a light-shielding layer 410 that divides each of a plurality of sub-pixels are positioned.

[0251] Referring to FIG. 17, a high-resistance oxide film 420 can be positioned on the other surface of the second substrate SUB2.

[0252] On the other hand, such a high-resistance oxide film 420 can be arranged to extend from the other surface of the second substrate SUB2 to the LOG region 1370.

[0253] In the LOG region 1370, a light-shielding layer 410 can be positioned to prevent light from leaking toward the edge of the display region AA.

[0254] In order to further suppress the phenomenon of light leakage, a light leakage prevention layer 1650 may be further positioned on the first substrate SUB1.

[0255] Such a light leakage prevention layer 1650 is positioned to overlap with the light-shielding layer 410 in the LOG region 1370. The light leakage prevention layer 1650 can be applied to the region on the first substrate SUB1 that overlaps with the light-shielding layer 410. The light leakage prevention layer 1650 can include a black pigment, but may also include a color pigment other than the black pigment.

[0256] A seal member 1630 can be positioned in the LOG region 1370. The seal member 1630 may be positioned to overlap with the light-shielding layer 410 and the light leakage prevention layer 1650.

[0257] On the other hand, referring to FIG. 17, a first wiring 1360 is positioned outside the seal member 1630.

[0258] In the touch display device according to an embodiment of the present disclosure, a parasitic capacitance is formed between a touch electrode TE to which a touch electrode drive signal TDS is applied and a first wiring 1360 to which a gate drive circuit control signal GCS is applied. In order to mitigate a decrease in touch sensing accuracy, a substance having a low dielectric constant can be disposed in a region 1640 on the first wiring 1360.

[0259] Alternatively, the region 1640 on the first wiring 1360 can be a vacant space. In such a case, the region 1640 between the first wiring 1360 and the second substrate SUB2 can be filled with air.

[0260] Here, the substance having a low dielectric constant can mean a substance having a lower dielectric constant than at least any one of the liquid crystal LC, the light-shielding layer 410, and the seal member 1630. Preferably, the substance having a low dielectric constant can mean a substance having a lower dielectric constant than any of the liquid crystal LC, the light-shielding layer 410, and the seal member 1630.

[0261] For example, in a normal use environment of the touch display device, the dielectric constant of the liquid crystal LC is about 8.7 (F / m), the dielectric constant of the light-shielding layer 410 is about 4 (F / m), and the dielectric constant of the seal member 1630 can be about 2.8 (F / m).

[0262] The value of the dielectric constant of air can be about 1.00059. According to this, air can correspond to a substance having a low dielectric constant.

[0263] Referring to FIG. 17, air may be positioned in the region 1640 between the first wiring 1360 and the second substrate SUB2 without positioning the seal member 1630 and the liquid crystal LC. Thereby, the parasitic capacitance value formed between the touch electrode TE and the first wiring 1360 can be minimized.

[0264] On one hand, the wide wiring 1510 to which a common voltage with a modulated pulse width is applied can be positioned to overlap with the seal member 1630, the liquid crystal LC, the light shielding layer 410, and the like. According to this, even if a substance with a relatively high dielectric constant is located on the wide wiring 1510, the accuracy of touch sensing does not decrease.

[0265] Therefore, the touch display device according to the embodiment of the present disclosure can provide a touch display device with improved touch sensing accuracy in the display area AA adjacent to the LOG area 1370.

[0266] Referring to FIG. 18, in the touch display device according to the embodiment of the present disclosure, the seal member 1630 can contact the wide wiring 1510 in the LOG area 1370. According to this, the light leakage prevention layer 1650 does not overlap with the seal member 1630 and can be located inside the seal member 1630.

[0267] Referring to FIG. 19, in the touch display device according to the embodiment of the present disclosure, one end of the light shielding layer 410 may overlap with the seal member 1630 or may be located inside the seal member 1630. That is, at least a part of the seal member 1630 can be positioned without overlapping with the light shielding layer 410.

[0268] For example, at least a part of the seal member 1630 can contact the second substrate SUB2. One end of the light shielding layer 410 may be located between the seal member 1630 and the second substrate SUB2 or may be located inside the seal member 1630.

[0269] Comparing the embodiment disclosed in FIG. 19 with the embodiment disclosed in FIG. 18, the light shielding layer 410, which is a substance with a relatively high dielectric constant in the area 1640 on the first wiring 1360, can be removed. This has an advantageous effect from the viewpoint of the accuracy of touch sensing.

[0270] Referring to FIG. 20, in the touch display device according to an embodiment of the present disclosure, the light leakage prevention layer 1650 can be positioned to overlap with the first wiring 1360 and / or the second wiring 1350 in the LOG region 1370. A light leakage prevention layer 1650 can be interposed between the first wiring 1360 and the second substrate SUB2. Comparing the embodiment of FIG. 20 with the embodiment of FIG. 18, in the embodiment of FIG. 20, a light leakage prevention layer 1650 disposed on the first wiring 1360 and / or the second wiring 1350 can be further disposed. According to this, the effect of preventing damage to the first wiring 1360 and / or the second wiring 1350 by the light leakage prevention layer 1650 can be further manifested.

[0271] Referring to FIG. 21, in the touch display device according to an embodiment of the present disclosure, in the LOG region 1370, the light leakage prevention layer 1650 can be positioned to overlap with the second wiring 1350 and / or the first wiring 1360. The seal member 1630 can be positioned to overlap with the second wiring 1350. For example, the light leakage prevention layer 1650 can be positioned on the second wiring 1350 and may not be positioned on the first wiring 1360. One end of the light leakage prevention layer 1650 and one end of the seal member 1630 may coincide. One end of the light leakage prevention layer 1650 and one end of the seal member 1630 may be positioned inside the first wiring 1360. One end of the light leakage prevention layer 1650 and one end of the seal member 1630 can be positioned on the second wiring 1350. The light shielding layer 410 may be positioned to overlap with the first wiring 1360, or may be positioned inside the first wiring 1360 so as not to overlap with the first wiring 1360.

[0272] Referring to FIG. 21, during the touch sensing period, a display voltage (e.g., VGL, VGH, etc.) pulse with a modulated pulse width can be applied to the second wiring 1350. According to this, substances with a relatively high dielectric constant (e.g., liquid crystal LC, light-shielding layer 410, seal member 1630, etc.) are located overlapping with a wiring (e.g., the second wiring 1350, wide wiring 1510, link line LL (see FIG. 15), etc.) to which a signal with a modulated pulse width is applied during the touch sensing period, and the influence of parasitic capacitance is minimized. That is, as an effect of load-free driving, the parasitic capacitance (see "Cpara" in FIG. 14) is minimized.

[0273] Also, during the touch sensing period, on the first wiring 1360 to which a signal with a modulated pulse width is not applied, a substance with a low dielectric constant is arranged, or the empty space is filled with air, so that the influence of the parasitic capacitance caused by the first wiring 1360 is minimized. That is, by lowering the dielectric constant, the parasitic capacitance (see "Cpara" in FIG. 14) is minimized.

[0274] For the reasons described above, the touch display device according to the embodiments of this specification can provide a touch display device with improved touch sensing accuracy.

[0275] FIGS. 22a and 22b are diagrams showing an example in which two or more first wirings 1360 and two or more second wirings 1350 are located in a non-display area in a touch display device according to an embodiment of the present disclosure.

[0276] Referring to FIGS. 22a and 22b, in the touch display device according to the embodiment of the present disclosure, two or more first wirings 1360 and two or more second wirings 1350 can be arranged in the LOG area 1370.

[0277] As shown in FIG. 22a, in the touch display device according to the embodiment of the present disclosure, two or more first wirings 1360 can be located adjacent to each other in the LOG area 1370, and two or more second wirings 1350 can be arranged adjacent to each other.

[0278] As shown in FIG. 22b, in the touch display device according to an embodiment of the present disclosure, one or more second wirings 1350 may be located between two or more first wirings 1360 in the LOG region 1370, or one or more first wirings 1360 may be located between two or more second wirings 1350.

[0279] Referring to FIGS. 22a and 22b, the wide wiring 1510 may be located closer to the display area AA than two or more first wirings 1360. And the wide wiring 1510 may be located closer to the display area AA than two or more second wirings 1350.

[0280] FIG. 23a is a cross-sectional view taken along line II-II′ of FIG. 22a in the touch display device according to an embodiment of the present disclosure, and FIG. 23b is a cross-sectional view taken along line II-II′ of FIG. 22b.

[0281] Referring to FIGS. 23a and 23b, at least a part of the liquid crystal LC having the highest dielectric constant may be arranged to overlap with the wide wiring 1510. At least a part of the liquid crystal LC may be arranged to overlap with the second wiring 1350 to which a signal with a modulated pulse width is input during the touch sensing period.

[0282] The seal member 1630 may be located to overlap with the wide wiring 1510, or may be located to overlap with the second wiring 1350. A part of the seal member 1630 may be located to overlap with the first wiring 1360.

[0283] On the other hand, a substance with a low dielectric constant may be located in the region 1640 between the first wiring 1360 and the second substrate SUB2. As described above, such a substance with a low dielectric constant may be, for example, air.

[0284] Referring to FIGS. 23a and 23b, the light shielding layer 410 may be located to overlap with the first wiring 1360, but it is also possible to arrange it inside the seal member 1630 so as not to overlap with the first wiring 1360.

[0285] When the touch display device according to an embodiment of the present disclosure includes two or more first wirings 1360 and two or more second wirings 1350, the embodiments disclosed in FIGS. 23a and 23b are merely examples and are not limited thereto. For example, when the touch display device includes two or more first wirings 1360 and two or more second wirings 1350, the embodiments described above in the description of FIGS. 17 to 21 can be similarly applied.

[0286] Thereby, the touch display device according to an embodiment of the present disclosure can provide a touch display device in which the accuracy of touch sensing in the edge region is significantly improved.

[0287] Briefly described, the embodiments of the present disclosure described above are as follows.

[0288] In an embodiment of the present disclosure, in a display area AA, a plurality of data lines DL, a plurality of gate lines GL, and a plurality of sub-pixels SP are located, and a plurality of touch electrodes TE overlapping at least one sub-pixel SP are located; a touch power circuit TPIC that generates and outputs a signal with a modulated pulse width in response to a voltage pulse corresponding to an input pulse width modulation PWM signal; a gate driving circuit GDC that supplies a scan signal Vgate to the plurality of gate lines GL; a display controller DCTR that outputs a gate driving circuit control signal GCS for controlling the driving timing of the gate driving circuit GDC; in the display panel DISP, a first wiring 1360 located in a non-display area 1370 around the display area AA and to which the gate driving circuit control signal GCS is applied, and a second wiring 1350 located in the non-display area 1370, having a wider width than the first wiring 1360, and to which the signal with the modulated pulse width is applied, a touch display device 100 can be provided.

[0289] In an embodiment of the present disclosure, the second wiring 1350 is located adjacent to the first wiring 1360, and a touch display device 100 electrically connected to the gate driving circuit GDC can be provided.

[0290] An embodiment of the present disclosure further includes a plurality of link lines LL that electrically connect between the gate driving circuit GDC and the plurality of gate lines GL, and the second wiring 1350 can provide a touch display device 100 that is located adjacent to the plurality of link lines LL.

[0291] In an embodiment of the present disclosure, the second wiring 1350 can provide a touch display device 100 having an inclined surface inclined in a direction corresponding to the direction in which the most adjacent link line LL among the plurality of link lines LL is arranged.

[0292] In an embodiment of the present disclosure, the display panel DISP includes a first pin 1330 configured to apply the gate driving circuit control signal GCS to the first wiring 1360, a second pin 1340 from which the gate driving circuit control signal GCS applied to the first wiring 1360 is output, a third pin 1310 configured to apply the signal with the modulated pulse width to the second wiring 1350, and a fourth pin 1320 from which the signal with the modulated pulse width applied to the second wiring 1350 is output, and a touch display device 100 can be provided.

[0293] An embodiment of the present disclosure further includes a first driving circuit 1120 that supplies, during a touch sensing period, a signal that is the same as or corresponds to the signal with the modulated pulse width to at least one touch electrode TE among the plurality of touch electrodes TE, and a second driving circuit 1130 including the gate driving circuit GDC, and further includes a bypass circuit 1520 that electrically connects the third pin 1310 and the fourth pin 1420, and a touch display device 100 can be provided.

[0294] In an embodiment of the present disclosure, the display panel DISP includes a first substrate SUB1 where the plurality of sub-pixels SP and the plurality of touch electrodes TE are located, a second substrate SUB2 where a light-shielding layer 410 that divides the plurality of sub-pixels is located on one side, and a seal member 1630 configured to bond the first substrate SUB1 and the second substrate SUB2 together, and a touch display device 100 can be provided.

[0295] In an embodiment of the present disclosure, the seal member 1630 can provide a touch display device 100 that is located to overlap with the second wiring 1350.

[0296] In an embodiment of the present disclosure, the first wiring 1360 can provide a touch display device 100 that is located outside the seal member 1630 in a region that does not overlap with the seal member 1630.

[0297] In an embodiment of the present disclosure, the first wiring 1360 can provide a touch display device 100 that is located without overlapping with the light-shielding layer 410.

[0298] An embodiment of the present disclosure can provide a touch display device 100 that further includes a light leakage prevention layer 1650 located on the second wiring 1350 and overlapping with the light-shielding layer 410.

[0299] In an embodiment of the present disclosure, the first wiring 1360 can provide a touch display device 100 that is located to overlap with the light leakage prevention layer 1650.

[0300] An embodiment of the present disclosure further includes liquid crystal LC located in a region surrounded by the seal member 1630 between the first substrate SUB1 and the second substrate SUB2, and a touch display device 100 can be provided where the light leakage prevention layer 1650, the liquid crystal LC, and the light-shielding layer 410 are located on the second wiring 1350.

[0301] In an embodiment of the present disclosure, a touch display device 100 can be provided in which the dielectric constant of the material located in the region 1640 between the first wiring 1360 and the second substrate SUB2 is smaller than the dielectric constant of the material located in the region between the second wiring 1350 and the second substrate SUB2.

[0302] An embodiment of the present disclosure can provide a touch display device 100 further including an oxide film 420 located on the other surface of the second substrate SUB2 and overlapping the second wiring 1350.

[0303] In an embodiment of the present disclosure, the oxide film 420 can provide a touch display device 100 that overlaps the first wiring 1360.

[0304] In an embodiment of the present disclosure, the touch power circuit TPIC generates and outputs a display voltage (for example, VGL, VGH, etc.) pulse with a modulated pulse width in response to a voltage pulse corresponding to an input pulse width modulation PWM signal, and the gate drive circuit GDC inputs the display voltage (for example, VGL, VGH, etc.) pulse with the modulated pulse width and generates and outputs the scan signal Vgate. A touch display device 100 can be provided.

[0305] In an embodiment of the present disclosure, in a display area AA, a plurality of data lines DL, a plurality of gate lines GL, and a plurality of sub-pixels SP are located, and a plurality of touch electrodes TE overlapping at least one sub-pixel SP are located. A display panel DISP, a touch power circuit TPIC that outputs a signal with a modulated pulse width and a display signal (e.g., VGH, VGL, etc.) according to a voltage pulse corresponding to an input pulse width modulation PWM signal, the display signals VGH, VGL are input, and a gate driving circuit GDC that generates and outputs a scan signal Vgate supplied to the plurality of gate lines GL, a display controller DCTR that outputs a gate driving circuit control signal GCS for controlling the driving timing of the gate driving circuit GDC, a first wiring 1360 located in a non-display area 1370 around the display area AA in the display panel DISP, to which the gate driving circuit control signal GCS is applied, and a second wiring 1350 located in the non-display area 1370, having a wider width than the first wiring 1360, to which the signal with the modulated pulse width or the display signals VGH, VGL are applied, a touch display device 100 can be provided.

[0306] In an embodiment of the present disclosure, the display panel DISP further includes a first substrate SUB1 on which the plurality of sub-pixels SP and the plurality of touch electrodes TE are located, a second substrate SUB2 on which a light-shielding layer 410 that divides the plurality of sub-pixels SP is located on one surface, and a sealing member 1630 configured to bond the first substrate SUB1 and the second substrate SUB2 together. The sealing member 1630 can provide a touch display device 100 that is located to overlap the second wiring 1350.

[0307] In an embodiment of the present disclosure, a touch display device 100 can be provided in which the dielectric constant of a substance located in a region 1640 between the first wiring 1360 and the second wiring 1350 is smaller than the dielectric constant of a substance located in a region between the second wiring 1350 and the second substrate SUB2.

[0308] The above description merely exemplarily explains the technical idea of the present disclosure. Those with ordinary knowledge in the technical field to which the present disclosure pertains will be able to make various modifications and variations without departing from the essential characteristics of the present disclosure. Also, the embodiments shown in the present disclosure are not intended to limit the technical idea of the present disclosure, but are for the purpose of explanation. Therefore, the scope of the technical idea of the present disclosure is not limited by these embodiments. The protection scope of the present disclosure should be interpreted according to the following claims, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present disclosure.

Description of Reference Numerals

[0309] 100 Touch display device 410 Light-shielding layer 420 Oxide film 1120 First drive circuit 1130 Second drive circuit 1310 Third pin 1320 Fourth pin 1330 First pin 1340 Second pin 1350 Second wiring 1360 First wiring 1370 LOG area 1510 Wide wiring 1520 Bypass circuit 1630 Seal member 1650 Light leakage prevention layer

Claims

1. In a display area, a display panel in which a plurality of data lines, a plurality of gate lines, and a plurality of sub-pixels are located, and a plurality of touch electrodes overlapping at least one sub-pixel are located; A touch power circuit that generates and outputs a signal with a modulated pulse width in response to a voltage pulse corresponding to an input pulse width modulation signal; A gate driving circuit that supplies a scan signal to the plurality of gate lines; A display controller that outputs a gate driving circuit control signal for controlling the driving timing of the gate driving circuit; A first wiring located in a non-display area around the display area of the display panel and to which the gate driving circuit control signal is input; and Including a second wiring located in the non-display area, having a wider width than the first wiring, and to which the signal with the modulated pulse width is input, The second wiring has a tapered V shape, an inclined surface, or a polygonal shape, During a touch sensing period, a first driving circuit that supplies a touch electrode driving signal that is the same as or corresponding to the signal with the modulated pulse width to at least one touch electrode among the plurality of touch electrodes; and Further including a second driving circuit including the gate driving circuit, The second driving circuit further includes a bypass circuit that electrically connects a third pin configured to apply the signal with the modulated pulse width to the second wiring and a fourth pin that outputs the signal with the modulated pulse width applied to the second wiring, a touch display device.

2. The touch display device according to claim 1, wherein the second wiring is located adjacent to the first wiring and is electrically connected to the gate driving circuit.

3. Further including a plurality of link lines that electrically connect between the gate driving circuit and the plurality of gate lines, The touch display device according to claim 1, wherein the second wiring is located adjacent to the plurality of link lines.

4. The touch display device according to claim 3, wherein the second wiring has an inclined surface inclined in a direction corresponding to the direction in which the most adjacent link line among the plurality of link lines is arranged.

5. The display panel is A first pin configured to apply the gate driving circuit control signal to the first wiring; A second pin that outputs the gate driving circuit control signal applied to the first wiring; The third pin; and The touch display device according to claim 1, including the fourth pin.

6. The display panel includes: a first substrate where the plurality of sub-pixels and the plurality of touch electrodes are located; a second substrate where a light-shielding layer that divides the plurality of sub-pixels is located on one surface; and The touch display device according to claim 1, further including a seal member configured to bond the first substrate and the second substrate together.

7. The touch display device according to claim 6, wherein the seal member is located overlapping the second wiring.

8. The touch display device according to claim 6, wherein the first wiring is located outside the seal member in a region where it does not overlap the seal member.

9. The touch display device according to claim 7, wherein the first wiring is located without overlapping the light-shielding layer.

10. The touch display device according to claim 6, further including a light leakage prevention layer located on the second wiring and overlapping the light-shielding layer.

11. The touch display device according to claim 10, wherein the first wiring is located overlapping the light leakage prevention layer.

12. Between the first substrate and the second substrate, further including liquid crystal located in a region surrounded by the seal member, On the second wiring, the light leakage prevention layer, the liquid crystal, and the light-shielding layer are located. The touch display device according to claim 10.

13. The dielectric constant of the material located in the region between the first wiring and the second substrate is smaller than the dielectric constant of the material located in the region between the second wiring and the second substrate. The touch display device according to claim 6.

14. The touch display device according to claim 6, further including an oxide film located on the other surface of the second substrate overlapping the second wiring.

15. The touch display device according to claim 14, wherein the oxide film is located overlapping the first wiring.

16. The touch power circuit generates and outputs a display voltage pulse with a modulated pulse width in response to a voltage pulse corresponding to the input pulse width modulation signal. The touch display device according to claim 1, wherein the gate drive circuit inputs the display voltage pulse with the modulated pulse width and generates and outputs the scan signal.

17. In a display area, there are a plurality of data lines, a plurality of gate lines, and a plurality of sub-pixels, and a plurality of touch electrodes overlapping at least one sub-pixel are located, a display panel; A touch power circuit that outputs a signal with a modulated pulse width and a display signal according to a voltage pulse corresponding to an input pulse width modulation signal; A gate driving circuit that receives the display signal and generates and outputs a scan signal to be supplied to the plurality of gate lines; A display controller that outputs a gate driving circuit control signal for controlling the driving timing of the gate driving circuit; In the display panel, a first wiring located in a non-display area around the display area and receiving the gate driving circuit control signal; and Including a second wiring located in the non-display area, having a wider width than the first wiring, and receiving the signal with the modulated pulse width or the display signal, The second wiring has a tapered V shape, an inclined surface, or a polygonal shape, During a touch sensing period, a first driving circuit that supplies a touch electrode driving signal that is the same as or corresponding to the signal with the modulated pulse width to at least one touch electrode among the plurality of touch electrodes; and Further including a second driving circuit including the gate driving circuit, The second driving circuit further includes a bypass circuit that electrically connects a third pin configured to apply the signal with the modulated pulse width to the second wiring and a fourth pin that outputs the signal with the modulated pulse width applied to the second wiring, a touch display device.

18. The display panel is A first substrate on which the plurality of sub-pixels and the plurality of touch electrodes are located; A second substrate on which a light shielding layer for partitioning the plurality of sub-pixels is located on one surface; and Further including a seal member configured to bond the first substrate and the second substrate together, The seal member is located overlapping the second wiring, the touch display device according to claim 17.

19. The dielectric constant of the material located in the region between the first wiring and the second substrate is smaller than the dielectric constant of the material located in the region between the second wiring and the second substrate, the touch display device according to claim 18.

Images