Touch display device

Abstract

A touch display device having enhanced touch sensing accuracy in a peripheral area thereof is disclosed. The touch display device includes a display panel including data lines, gate lines, sub-pixels, and touch electrodes overlapping the sub-pixels, a touch power circuit configured to generate and output a pulse width modulated signal, a gate driving circuit configured to provide a scan signal to the gate lines, a display controller configured to output a gate driving circuit control signal controlling a driving timing of the gate driving circuit, a first line in a non-display area of the display panel, the first line receiving the gate driving circuit control signal, and a second line in the non-display area, the second line receiving the pulse width modulated signal, wherein a width of the second line is greater than a width of the first line.

Description

Technical Field

[0001] Embodiments of this disclosure relate to touch display devices. Background Technology

[0002] The development of the information society has led to various needs for touch display devices. Recently, various display devices, such as liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays, have been used.

[0003] Among other things, touch display devices provide an input scheme that allows users to enter information or commands more easily, intuitively, and conveniently without the need for buttons, keyboards, mice, or other typical input devices. Summary of the Invention

[0004] Embodiments of this disclosure may provide a touch display device with enhanced touch sensing accuracy in its peripheral area.

[0005] In one embodiment, a touch display device includes: a display panel including a plurality of data lines, a plurality of gate lines, a plurality of sub-pixels located in a display area of ​​the display panel, and a plurality of touch electrodes overlapping at least one of the plurality of sub-pixels; a touch power circuit configured to generate and output a signal pulse-width modulated according to a voltage pulse, the voltage pulse corresponding to an input pulse-width modulated signal; a gate drive circuit configured to provide a scan signal to the plurality of gate lines; a display controller configured to output a gate drive circuit control signal, the gate drive circuit control signal controlling the drive timing of the gate drive circuit; a first line located in a non-display area of ​​the display panel, the first line receiving the gate drive circuit control signal; and a second line located in the non-display area, the second line receiving a pulse-width modulated signal, wherein the width of the second line is greater than the width of the first line.

[0006] In one embodiment, a touch display device includes: a display panel including a plurality of data lines, a plurality of gate lines, a plurality of subpixels located in a display area of ​​the display panel, and a plurality of touch electrodes overlapping at least one of the plurality of subpixels; one or more signal generation circuits configured to generate a first signal and one or more second signals, the first signal being unmodulated by pulse width modulation and used for display driving during a display period, the one or more second signals being pulse-width modulated and used for touch sensing during a touch sensing period and for display driving during the display period; a first line located in a non-display area of ​​the display panel, the first line receiving the unmodulated first signal; and a second line located in a non-display area of ​​the display panel, the second line receiving a second signal from one or more pulse-width modulated second signals, wherein the width of the second line is wider than the width of the first line.

[0007] According to embodiments of the present disclosure, a touch display device with enhanced touch sensing accuracy in its peripheral area can be provided. Attached Figure Description

[0008] The above and other objects, features and advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0009] Figure 1 This is a diagram that schematically illustrates the system configuration of a touch display device according to an embodiment of the present disclosure;

[0010] Figure 2 This is a schematic diagram illustrating the display driver of a touch display device according to an embodiment of the present disclosure;

[0011] Figure 3 This is a schematic illustration of the touch drive of a touch display device according to an embodiment of the present disclosure;

[0012] Figure 4 This is a diagram schematically illustrating a touch sensing method using a self-capacitance scheme according to an embodiment of the present disclosure;

[0013] Figure 5 and Figure 6 This is a diagram illustrating a time-division driving scheme for a touch display device according to an embodiment of the present disclosure;

[0014] Figure 7 This is a diagram illustrating a time-freedriving scheme for a touch display device according to an embodiment of the present disclosure;

[0015] Figure 8This is a diagram illustrating three cases of time-free driving when the touch display device performs time-free driving according to embodiments of the present disclosure;

[0016] Figure 9 This is a diagram illustrating the touch electrode drive signal TDS for each of three cases of time-free driving for a touch display device according to embodiments of the present disclosure.

[0017] Figure 10 This is a diagram illustrating the waveform of the main signal for each of three cases of time-free driving in a touch display device according to embodiments of the present disclosure;

[0018] Figure 11 This is a diagram illustrating a time-free drive system for a touch display device according to an embodiment of the present disclosure;

[0019] Figure 12 This is a schematic illustration of a touch display device according to an embodiment of the present disclosure;

[0020] Figure 13 This is an example of a touch display device according to an embodiment of the present disclosure. Figure 12 A magnified view of region X;

[0021] Figure 14 This is a conceptual illustration of the parasitic capacitance formed at the touch electrode where a touch electrode drive signal is applied in a touch display device according to an embodiment of the present disclosure;

[0022] Figure 15 This is a diagram illustrating an example of a wide line positioned on a first substrate in a touch display device according to an embodiment of the present disclosure;

[0023] Figure 16 This is a diagram illustrating an example of a touch display device according to an embodiment of the present disclosure, in which the first line and the second line are positioned in a non-display area;

[0024] Figure 17 , Figure 18 , Figure 19 , Figure 20 and Figure 21 In a touch display device according to an embodiment of the present disclosure, along Figure 16 The image captured by I-I';

[0025] Figure 22A and Figure 22B This is a diagram illustrating an example of two or more first lines and two or more second lines positioned in a non-display area in a touch display device according to an embodiment of the present disclosure;

[0026] Figure 23AIn a touch display device according to an embodiment of the present disclosure, along Figure 22A The cross-sectional view taken from section II-II'; and

[0027] Figure 23B It is according to the embodiments of this disclosure along Figure 22B The cross-sectional view taken from section II-II'. Detailed Implementation

[0028] In the following description of examples or embodiments of this disclosure, reference will be made to the accompanying drawings, which illustrate specific examples or embodiments that can be implemented by way of example, and wherein the same reference numerals and designations may be used to designate the same or similar components even when components are shown in different drawings. Furthermore, in the following description of examples or embodiments of this disclosure, detailed descriptions of well-known functions and components incorporated herein will be omitted where such descriptions could make the subject matter considerably unclear in some embodiments of this disclosure. Terms such as “comprising,” “having,” “containing,” “constituting,” “forming,” and “formed from” as used herein are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise.

[0029] Terms such as “first,” “second,” “A,” “B,” “(A),” or “(B)” may be used herein to describe elements of this disclosure. Each of these terms is not used to define the nature, order, sequence, or number of elements, but is only used to distinguish the corresponding element from other elements.

[0030] When it is mentioned that the first element is "connected to or linked to," "contacts with or overlaps" the second element, it can be understood that not only can the first element be "directly connected to or linked to" or "directly contact or overlaps" the second element, but a third element can also be "inserted" between the first and second elements, or the first and second elements can be "connected to or linked to," "contacts with or overlaps" each other via a fourth element. Here, the second element can be included in at least one of two or more elements that are "connected to or linked to," "contacts with," or "overlaps" each other.

[0031] When using time-relative terms such as “after,” “following,” “next,” or “before” to describe the process or operation of an element or configuration, or the flow or steps in an operation, processing, or manufacturing method, these terms may be used to describe discontinuous or non-sequential processes or operations unless used together with the terms “directly” or “immediately after.”

[0032] Additionally, when referring to any size, relative dimensions, etc., it can be considered that, even when no specific description is specified, the numerical values ​​or corresponding information of the component or feature (e.g., level, range, etc.) include tolerances or error ranges that may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.). Furthermore, the term "can" fully encompasses all the meanings of the term "able to".

[0033] Various embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0034] Figure 1 This is a diagram schematically illustrating the system configuration of a touch display device 100 according to an embodiment of the present disclosure. Figure 2 This is a schematic illustration of the display driver of a touch display device 100 according to an embodiment of the present disclosure. Figure 3 This is a schematic illustration of the touch drive of a touch display device 100 according to an embodiment of the present disclosure.

[0035] Reference Figure 1 The touch display device 100 according to embodiments of the present disclosure can provide a display function for displaying images. The touch display device 100 according to embodiments 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 based on the result of the touch sensing function according to the user's touch.

[0036] In the following text, refer to Figure 1 and Figure 2 Describes the display driver used to provide display functionality, and refers to Figure 1 and Figure 3 Describe the components and touch drivers used to provide touch sensing functionality.

[0037] Reference Figure 1 and Figure 2 The touch display device 100 according to embodiments of the present disclosure may include a display panel DISP in which multiple data lines DL and multiple gate lines GL are positioned to provide display functionality. Multiple sub-pixels SP connected to the multiple data lines DL and multiple gate lines GL may be disposed on the display panel DISP. The touch display device 100 according to embodiments of the present disclosure may include the display panel DISP, a data driving circuit DDC configured to drive the multiple data lines DL, a gate driving circuit GDC configured to drive the multiple gate lines GL, and a display controller DCTR configured to control the data driving circuit DDC and the gate driving circuit GDC.

[0038] The display controller DCTR can provide various control signals to the data drive circuit DDC and the gating drive circuit GDC to control them.

[0039] As an example, to control the gating drive circuit GDC, the display controller DCTR outputs various gating drive circuit control signals GCS, including a gating start pulse GSP, a gating shift clock GSC, and a gating output enable signal GOE. In one embodiment, the gating drive circuit GDC generates the gating signal based on the gating drive circuit control signal GCS.

[0040] To control the data drive circuit DDC, the display controller DCTR outputs various data drive circuit control signals DCS, including, for example, the source start pulse SSP, the source sampling clock SSC, and the source output enable (SOE) signal.

[0041] The display controller DCTR can start scanning according to the timing in each frame, convert the image data input from the outside into a data signal format suitable for use in the data drive circuit DDC, output the converted image data, and control the data drive at the appropriate time according to the scan.

[0042] The gating drive circuit GDC, under the control of the display controller DCTR, sequentially provides scanning signals (e.g., gating signals) of conduction voltage or cutoff voltage to multiple gating lines GL based on the gating drive circuit control signal GCS.

[0043] When the gate drive circuit GDC turns on a specific gate line GL, the data drive circuit DDC converts the image data signal received from the display controller DCTR into an analog signal and provides the data signal Vdata corresponding to the image analog signal to multiple data lines DL.

[0044] The display controller DCTR can be a timing controller used in typical display technologies, a control device that performs other control functions and the functions of a timing controller, or a control device other than a timing controller.

[0045] The display controller DCTR can be implemented as a separate component from the data drive circuit DDC, or the display controller DCTR together with the data drive circuit DDC can be implemented as an integrated circuit.

[0046] The data driver circuit DDC drives multiple data lines DL by providing data signals Vdata to them. Here, the data driver circuit DDC is also referred to as a "source driver".

[0047] The data driver circuit (DDC) may include at least one source driver integrated circuit (SDIC). Each source driver integrated circuit (SDIC) may include a shift register, latch circuitry, a digital-to-analog converter (DAC), and an output buffer circuit. In some cases, each source driver integrated circuit (SDIC) may also include an analog-to-digital converter (ADC).

[0048] Each source driver integrated circuit (SDIC) can be connected to the bonding pads of the display panel DISP using a tape-on-board (TAB) or chip-on-glass (COG) approach, or it can be directly mounted on the display panel DISP, or in some cases integrated into the display panel DISP. Each source driver integrated circuit (SDIC) can also be implemented using a chip-on-film (COF) approach, mounted on the film connected to the display panel DISP.

[0049] The gating drive circuit GDC drives multiple gating lines GL by providing a scan signal Vgate (also known as scan voltage, scan signal, or gating voltage) to them. Here, the gating drive circuit GDC is also referred to as a "scan driver".

[0050] Here, the scan signal Vgate may include a cutoff level gating voltage to allow the gating line GL to be turned off, and an on level gating voltage to allow the gating line GL to be turned on.

[0051] More specifically, the scan signal Vgate may include a cutoff level gating voltage and a turn-on level gating voltage, the cutoff level gating voltage turning off the transistor connected to the corresponding gating line GL, and the turn-on level gating voltage turning on the transistor connected to the corresponding gating line GL.

[0052] When the transistor is N-type, the cutoff level gating voltage can be a low-level gating voltage VGL, and the on-level gating voltage can be a high-level gating voltage VGH, which is greater than the cutoff level gating voltage. When the transistor is P-type, the cutoff level gating voltage can be a high-level gating voltage VGH, and the on-level gating voltage can be a low-level gating voltage VGL, which is less than the high-level gating voltage. For ease of description, in the following description, the cutoff level gating voltage is the low-level gating voltage VGL, and the on-level gating voltage is the high-level gating voltage VGH.

[0053] The gating driver circuit GDC may include at least one gating driver integrated circuit GDIC. Each gating driver integrated circuit GDIC may include, for example, a shift register and a level shifter.

[0054] Each gate driver integrated circuit (GDIC) can be connected to the bonding pads of the display panel DISP using a tape-on-brush (TAB) or chip-on-glass (COG) approach, or it can be implemented as a gate-in-panel (GIP) type directly disposed on the display panel DISP, or in some cases, integrated into the display panel DISP. Each gate driver integrated circuit (GDIC) can also be implemented as a chip-on-film (COF) approach, mounted on the film connected to the display panel DISP.

[0055] The data drive circuit (DDC) can be positioned as follows: Figure 1 The display panel DISP shown is located on only one side (e.g., the top or bottom side), and in some cases, depending on the driving scheme or panel design, the data driving circuit DDC can be located on each of the two opposite sides (e.g., the top and bottom sides) of the display panel DISP.

[0056] The gating drive circuit GDC can be positioned as follows: Figure 1 The display panel DISP shown is located on only one side (e.g., the left or right side), and in some cases, depending on the driving scheme or panel design, the gating drive circuit GDC can be located on each of the two opposite sides (e.g., the left and right sides) of the display panel DISP.

[0057] The touch display device 100 according to embodiments of the present disclosure can be various types of display devices, such as liquid crystal display devices and organic light-emitting display devices. The display panel DISP according to embodiments of the present disclosure can also be various types of display panels, such as liquid crystal display panels and organic light-emitting display panels.

[0058] Each subpixel SP positioned on the display panel DISP can include one or more circuit elements (e.g., transistors or capacitors).

[0059] For example, when the display panel DISP is a liquid crystal display panel, each sub-pixel SP may include a pixel electrode and a transistor electrically connected between the pixel electrode and the data line DL. The transistor can be turned on by a scan signal Vgate provided to the gate node via the gate line GL, and when turned on, a data signal Vdata provided to the source node (or drain node) is output to the drain node (or source node) via the data line DL. The transistor can apply the data signal Vdata to the pixel electrode electrically connected to the drain node (or source node). An electric field can be generated between the pixel electrode providing the data signal Vdata and the common electrode providing the common voltage Vcom, and a capacitance can be generated between the pixel electrode and the common electrode.

[0060] The structure of each sub-pixel SP can vary depending on the panel type, the functions provided, and the design scheme.

[0061] Reference Figure 1 and Figure 3 The touch display device 100 according to embodiments of the present disclosure may include a touch panel TSP, a touch driving circuit TDC for driving and sensing the touch panel TSP, and a touch controller TCTR for detecting the presence or absence of a touch and / or the coordinates of a touch using the result of sensing the touch panel TSP by the touch driving circuit TDC, so as to provide touch sensing functionality.

[0062] The touch panel TSP can be touched or approached by a user's pointer. A touch sensor can be located on the touch panel TSP.

[0063] In one implementation, the user's pointer can be a finger or a pen.

[0064] The pen can be a passive pen without signal transmission / reception or an active pen with signal transmission / reception capabilities. The touch driver circuit (TDC) provides touch drive signals to the touch panel (TSP) and senses the touch panel (TSP). The touch controller (TCTR) can sense touch using the results of sensing the touch panel (TSP) through the touch driver circuit (TDC). Touch sensing can refer to detecting the presence or absence of a touch and / or the coordinates of the touch.

[0065] The touch panel TSP can be an external type where the touch panel TSP is set outside the display panel DISP, or it can be a built-in type where the touch panel TSP is set inside the display panel DISP.

[0066] When the touch panel TSP is of the external type, the touch panel TSP and the display panel DISP can be manufactured separately and then bonded together using adhesives or the like. External type touch panel TSPs are also known as add-on types.

[0067] When the touch panel TSP is an integrated type, it can be manufactured together with the display panel DISP during the manufacturing process. In other words, the touch sensor constituting the touch panel TSP can be located inside the display panel DISP. An integrated touch panel TSP can be of the in-cell type, on-cell type, or a hybrid type.

[0068] In the following description, for ease of description, it is assumed that the touch panel TSP is a built-in type in which the touch panel TSP is embedded in the display panel DISP.

[0069] When the touch panel TSP is embedded in the display panel DISP, that is, when multiple touch electrodes TE are set on the display panel DISP, the multiple touch electrodes TE can be configured on the display panel DISP, separate from the electrodes used for display driving, and the electrodes set on the display panel DISP for display driving can be used as multiple touch electrodes TE.

[0070] For example, a common electrode disposed on a display panel DISP can be divided into multiple parts to serve as multiple touch electrodes TE. In other words, the multiple touch electrodes TE disposed on a display panel DISP can be electrodes for touch sensing and electrodes for display driving. In the following text, it is assumed that the multiple touch electrodes TE disposed on a display panel DISP are a common electrode.

[0071] The touch controller TCTR can be implemented as, for example, a microcontroller unit (MCU), a processor, etc.

[0072] The display controller DCTR and the touch controller TCTR can be implemented separately or integrated.

[0073] Reference Figure 3 The touch panel TSP of the touch display device 100 according to embodiments of the present disclosure may include a plurality of touch electrodes TE and a plurality of touch lines TL, the plurality of touch lines TL being configured to electrically connect the plurality of touch electrodes TE to a touch driving circuit TDC. The plurality of touch electrodes TE may be arranged in a matrix. Each of the plurality of touch electrodes TE may be electrically connected to one or more touch lines TL through one or more contact holes.

[0074] According to embodiments of the present disclosure, the touch display device 100 can sense touch based on the self-capacitance of the touch electrodes TE or based on the mutual capacitance between the touch electrodes TE.

[0075] When the touch display device 100 according to an embodiment of the present disclosure senses touch based on self-capacitance, the touch panel TSP may include a plurality of first touch electrode lines and a plurality of second touch electrode lines that intersect each other. For example, the plurality of first touch electrode lines may be arranged along the X-axis direction (e.g., a first direction), and the plurality of second touch electrode lines may be arranged along the Y-axis direction (e.g., a second direction). Each of the first touch electrode lines and the second touch electrode lines may be a strip-shaped touch electrode, or may have two or more touch electrodes electrically connected to each other. The first touch electrode line may be referred to as a driving line, driving electrode, driving touch electrode line, Tx line, Tx electrode, or Tx touch electrode line. The second touch electrode line may be referred to as a receiving line, receiving electrode, receiving touch electrode line, sensing line, sensing electrode, sensing touch electrode line, Rx line, Rx electrode, or Rx touch electrode line.

[0076] In this configuration, the touch drive circuit TDC can provide a drive signal to one or more of the multiple first touch electrode lines and sense the second touch electrode line to output sensing data. The touch controller TCTR can use the sensing data to calculate the presence or absence of a touch and / or the coordinates of the touch.

[0077] When the touch display device 100 according to an embodiment of the present disclosure senses touch based on mutual capacitance, a plurality of touch electrodes TE can be arranged separately from each other on the touch panel TSP, such as Figure 3 As shown.

[0078] In this case, the touch drive circuit TDC can provide drive signals (hereinafter referred to as touch electrode drive signals TDS) to all or some of the multiple touch electrodes TE, and sense one or more touch electrodes TE that have been provided with drive signals to output sensing data, and the touch controller TCTR can use the sensing data to calculate the presence or absence of touch and / or the coordinates of touch.

[0079] In the following description, for ease of description, it may be assumed that the touch display device according to the embodiments of the present disclosure senses touch based on self-capacitance, and that the touch panel TSP is as follows: Figure 2 and Figure 3 The configuration shown is as shown.

[0080] The touch electrode drive signal TDS output from the touch driver circuit TDC can be a signal with a constant voltage or a signal with a variable voltage.

[0081] When the touch electrode drive signal TDS is a signal with a variable voltage, the touch electrode drive signal TDS can have various signal waveforms, such as sine wave shape, triangle wave shape or square wave shape.

[0082] The following assumes that when the touch electrode driving signal TDS is a signal with a variable voltage, the touch electrode driving signal TDS is a pulse signal composed of several pulses. When the touch electrode driving signal TDS is a pulse signal composed of several pulses, the touch electrode driving signal TDS can have a constant frequency or a variable frequency.

[0083] Reference Figure 2 and Figure 3 The size of the area occupied by a single touch electrode TE can correspond to the size of the area occupied by a single sub-pixel SP, or it can correspond to the size of the area occupied by two or more sub-pixels SP. In other words, each of the multiple touch electrodes TE can overlap with two or more sub-pixels SP.

[0084] When multiple touch electrodes TE are arranged in a matrix, and the first touch electrode and the second touch electrode are arranged in the same column (or row) among the multiple touch electrodes TE, two or more data lines DL that overlap with the first touch electrode may overlap with the second touch electrode. Two or more gate lines GL that overlap with the first touch electrode may not overlap with the second touch electrode.

[0085] Multiple touch electrode columns (or touch electrode rows) can be arranged parallel to multiple data lines DL. Multiple touch lines TL can be arranged parallel to multiple data lines DL.

[0086] Multiple touch electrodes (TEs) are arranged in a single touch electrode column (or row). Multiple touch lines (TLs) electrically connected to the multiple touch electrodes (TEs) may overlap with the multiple touch electrodes (TEs).

[0087] For example, suppose that multiple touch electrodes TE arranged in a touch electrode column may include a first touch electrode and a second touch electrode, and a first touch line is electrically connected to the first touch electrode and the touch driver circuit TDC, and a second touch line is electrically connected to the second touch electrode and the touch driver circuit TDC. In this case, the first touch line electrically connected to the first touch electrode may overlap with the second touch electrode (the touch electrode arranged in the same column as the first touch electrode), but in the display panel DISP, it may be electrically insulated (separated) from the second touch electrode. Depending on the driving conditions or necessity, the first touch line and the second touch line may be short-circuited in the touch driver circuit TDC.

[0088] Figure 4 This is a diagram that schematically illustrates a touch sensing method using a self-capacitance scheme.

[0089] Reference Figure 4 The touch display device according to embodiments of the present disclosure may include a first substrate SUB1 and a second substrate SUB2. A polarizing plate POL and a cover window CW may also be positioned on the first substrate SUB1 and the second substrate SUB2.

[0090] Multiple data lines DL and multiple gate lines GL are positioned on the first substrate SUB1. The first substrate SUB1 is also referred to as a thin-film transistor substrate (or array substrate).

[0091] A light-blocking layer 410 for separating multiple sub-pixels and a color filter layer CF including a color filter can be positioned on a second substrate SUB2. The second substrate SUB2 is also referred to as a color filter substrate. The color filter substrate can be bonded to an array substrate. Liquid crystal (LC) can fill the space between the array substrate and the color filter substrate.

[0092] Reference Figure 4Multiple touch electrodes TE for touch sensing are positioned on multiple data lines DL and multiple gate lines GL.

[0093] A touch electrode drive signal TDS is applied to at least one of the multiple touch electrodes TE. As described above, the touch driving circuit can provide touch electrode drive signals to all or some of the multiple touch electrodes TE, and sense one or more touch electrodes TE that have been provided with touch electrode drive signals TDS to output sensing data.

[0094] If a pointer, including a human finger, touches or approaches the surface of the touch display device, the capacitance formed at the touch electrode TE changes from its initial value.

[0095] For example, refer to Figure 4 If a finger touches the cover window CW of the touch display device, a predetermined capacitance C is formed between the touch electrode TE and the finger. F The touch driving circuit can sense the touch electrode TE and output sensing data to determine the presence or absence of a touch and / or the location of the touch.

[0096] To improve touch sensing accuracy, a high-resistivity insulator can be placed on the touch electrode TE and the cover window CW. Therefore, the capacitance C formed at the touch electrode TE can be increased. F Therefore, the accuracy of touch sensing can be improved.

[0097] Reference Figure 4 High-resistance insulators can be high-resistance polarizing plates (POL).

[0098] In some cases, a high-resistivity oxide layer 420 (or oxide film) may also be disposed between the touch electrode TE and the cover window CW. The high-resistivity oxide layer 420 may be applied to the upper surface of the second substrate SUB2. The upper surface of the second substrate SUB2 may refer to the surface of the second substrate SUB2 opposite to the surface on which the color filter layer CF is positioned. The resistance of the oxide layer 420 may be in the range of approximately 10^6.5 Ω to 10^8.5 Ω (ohms).

[0099] By coating a high-resistivity oxide film on the upper surface of the second substrate SUB2, a polarizing plate POL with low resistance can be used.

[0100] Therefore, one or more insulating materials can be positioned between the touch electrode TE and the cover window CW.

[0101] Reference Figure 4At least one of the liquid crystal LC, the light-blocking layer 410, the high-resistivity oxide layer 420, and the polarizing plate POL can be positioned between the touch electrode TE and the cover window CW.

[0102] For example, the dielectric constant of a liquid crystal LC can be approximately 8.7 (F / m). The dielectric constant of the light-blocking layer 410 can be approximately 4 (F / m).

[0103] At least one touch electrode TE, to which a touch electrode drive signal TDS is applied, can form a parasitic capacitance Cp with the surrounding electrodes and the surrounding wires.

[0104] Reference Figure 4 At least one touch electrode TE to which a touch electrode drive signal TDS is applied can form a parasitic capacitance Cp(T) with one or more touch electrodes TE positioned around it. At least one touch electrode TE to which a touch electrode drive signal TDS is applied can form a data line parasitic capacitance Cp(D) with one or more data lines DL positioned around it. At least one touch electrode TE to which a touch electrode drive signal TDS is applied can form a parasitic capacitance Cp(G) with one or more gate lines GL positioned around it.

[0105] Figure 5 and Figure 6 This is a diagram illustrating a time-division driving (TDD) scheme for a touch display device according to an embodiment of the present disclosure.

[0106] Reference Figure 5 The touch display device according to embodiments of the present disclosure can alternately perform display driving and touch sensing. As described above, the scheme in which display driving for display and touch driving for touch sensing are alternately performed is called time-division driving.

[0107] According to the time-division driving scheme, a display period for display and a touch sensing period for touch sensing alternate. During the display period, the touch display device can perform display driving. During the touch sensing period, the touch display device can perform touch driving.

[0108] As an example of a time-division driving scheme, a frame of time in which an image is displayed can be divided into a display period and a touch sensing period. As another example of a time-division scheme, a frame of time can be divided into two or more display periods and one or more touch sensing periods.

[0109] Reference Figure 5 According to the time-division driving scheme, the touch electrode driving signal TDS can be applied to one or more touch electrodes TE during the touch sensing period. In this case, multiple data lines DL and multiple gate lines GL do not need to be driven.

[0110] In this situation, unwanted parasitic capacitance may form between the touch electrode TE, to which the touch electrode drive signal TDS is applied, and one or more data lines DL positioned around the touch electrode TE, due to the potential difference. This unwanted parasitic capacitance may increase the resistor-capacitor (RC) delay for the touch electrode TE and the touch line TL connected to it, thereby degrading touch sensitivity.

[0111] Furthermore, due to the potential difference, unwanted parasitic capacitance may form between the touch electrode TE, to which the touch electrode drive signal TDS is applied, and one or more gate lines GL positioned around the touch electrode TE. This unwanted parasitic capacitance may increase the RC delay for the touch electrode TE and the touch line TL connected to the touch electrode TE, thereby degrading touch sensitivity.

[0112] Furthermore, due to the potential difference, unwanted parasitic capacitance may form between the touch electrode TE to which the touch electrode drive signal TDS is applied and one or more other touch electrodes TE located around it. This unwanted parasitic capacitance may increase the RC delay for the touch electrode TE and the touch line TL connected to it, thereby degrading touch sensitivity.

[0113] The aforementioned RC delay can also be referred to as a time constant or load.

[0114] To remove this load, the touch display device according to embodiments of the present disclosure can perform loadless driving (LFD) during the touch sensing period.

[0115] When driven without load, when the touch electrode drive signal TDS is applied to all or some of the multiple touch electrodes TE, the touch display device according to the embodiments of the present disclosure can apply the no-load drive signal as a data signal Vdata to some or all data lines DL that have the opportunity to cause parasitic capacitance.

[0116] When the touch electrode drive signal TDS is applied to all or some of the multiple touch electrodes TE during no-load driving, the touch display device according to the embodiments of the present disclosure can apply the no-load drive signal as a scan signal Vgate to some or all of the gate lines GL that have the opportunity to cause parasitic capacitance.

[0117] When the touch electrode drive signal TDS is applied to some of the multiple touch electrodes TE during no-load driving, the touch display device according to the embodiments of the present disclosure can apply the no-load drive signal to some other touch electrodes TE or all touch electrodes TE that have the opportunity to cause parasitic capacitance.

[0118] The aforementioned no-load drive signal can be a touch electrode drive signal or a signal with the same or similar signal characteristics as the touch electrode drive signal. For example, the frequency and phase of the aforementioned no-load drive signal can be the same as or fall within a predetermined error range of the frequency and phase of the touch electrode drive signal TDS. The amplitude of the no-load drive signal can be the same as or fall within a predetermined error range of the amplitude of the touch electrode drive signal TDS, and in some cases, there may be expected differences.

[0119] Figure 7 This is a diagram illustrating a time-free drive (TFD) scheme for a touch display device according to an embodiment of the present disclosure.

[0120] Reference Figure 7 The touch display device according to the embodiments of this disclosure can independently perform display driving and touch sensing. As described above, the driving scheme for independently performing display driving and touch driving for touch sensing is called a time-free driving scheme.

[0121] According to this time-free driving scheme, the display driver for display and the touch driver for touch sensing can run simultaneously. During a given period, only the display driver for display or only the touch driver for touch sensing can be executed.

[0122] Figure 8 This is a diagram illustrating three cases (e.g., case 1, case 2, and case 3) of time-free driving when the touch display device performs time-free driving according to embodiments of the present disclosure. Figure 9 This is a diagram illustrating the touch electrode drive signal TDS for each of three cases (e.g., case 1, case 2, and case 3) of time-free driving for a touch display device according to embodiments of the present disclosure.

[0123] According to case 1 of time-free driving, the touch display device can simultaneously perform display driving and touch driving. In this case, when the data signal Vdata for image display is provided to multiple data lines DL through the data driving circuit DDC to perform display driving, the touch driving circuit TDC can sense at least one of the multiple touch electrodes TE.

[0124] In case 1, the touch display device can provide a touch electrode drive signal TDS with a variable voltage to the touch electrode TE to perform touch driving.

[0125] In the following text, in Case 1, the touch electrode drive signal TDS applied to the touch electrode TE is referred to as the first touch electrode drive signal TDS1. The first touch electrode drive signal TDS1 has a first amplitude AMP1.

[0126] In scenario 1, the touch display device can perform touch sensing, thereby sensing touches caused by finger contact on the touch panel TSP. This type of touch sensing is called finger sensing.

[0127] Alternatively, in case 1, when a finger or pen approaches the touch panel TSP but does not touch it, the touch display device can execute a touch drive to sense the touch caused by the finger or pen. This touch sensing is called hover sensing.

[0128] Under case 2, which is time-free driving, the touch display device can perform only the display driving.

[0129] In scenario 2, the touch display device does not perform typical touch driving because it does not need to sense touches caused by fingers. In other words, the touch display device does not provide touch electrode drive signals TDS with variable voltages to the multiple touch electrodes TE disposed on the touch panel TSP.

[0130] In Case 2, the touch display device can provide a touch electrode drive signal TDS in the form of a DC voltage. In the following text, the touch electrode drive signal TDS applied to the touch electrode TE in Case 2 is referred to as the second touch electrode drive signal TDS2.

[0131] In scenario 2, the touch display device can sense the pen by receiving the pen signal output from the pen via the touch electrode TE. As a result of pen sensing, the touch display device can obtain the pen's position, tilt, pressure (pen pressure), or various additional information.

[0132] According to case 3, which is time-free driving, the touch display device can only perform touch driving.

[0133] In case 3, the touch display device can provide a touch electrode drive signal TDS with a variable voltage to the touch electrode TE to perform touch driving.

[0134] In the following text, in case 3, the touch electrode drive signal TDS applied to the touch electrode TE is referred to as the third touch electrode drive signal TDS3. The third touch electrode drive signal TDS3 has a third amplitude AMP3 that is different from the first amplitude AMP1.

[0135] In case 3, the touch display device can perform touch sensing to sense touches caused by finger contact on the touch panel TSP.

[0136] Reference Figure 8 In a touch display device, among the three time-driven scenarios (Scenario 1, Scenario 2, and Scenario 3), Scenario 1 can be performed during the display time, and Scenario 3 can be performed during the blanking time. The display time can correspond to the time when a frame of the image is displayed, and the blanking time can correspond to the time from when a frame of the image is displayed until the start of displaying the next frame of the image.

[0137] Reference Figure 8 During the display period, case 1 can be changed to case 2.

[0138] Reference Figure 8 During the display period, the touch display device can perform both display driving and touch driving for finger sensing (continuing with case 1), and for pen sensing, touch driving for finger sensing can be stopped (i.e., changing from case 1 to case 2).

[0139] In cases 1 and 3, during touch driving for finger sensing, touch electrode driving signals TDS1 and TDS3, with amplitudes AMP1 and AMP3 respectively, can be applied to touch electrode TE.

[0140] Reference Figure 9 In case 1, where both touch driving and display driving are performed, the first amplitude AMP1 of the first touch electrode driving signal TDS1 applied to the touch electrode TE can be smaller than the third amplitude AMP3 of the third touch electrode driving signal TDS3 applied to the touch electrode TE in case 3, where touch driving is performed but display driving is not performed.

[0141] The first amplitude AMP1 of the first touch electrode drive signal TDS1 applied to the touch electrode TE during the display time can be smaller than the third amplitude AMP3 of the third touch electrode drive signal TDS3 applied to the touch electrode TE during the blanking time.

[0142] Reference Figure 8 During the display period, the touch driving circuit TDC can provide a first touch electrode driving signal TDS1 with a first amplitude AMP1 or a second touch electrode driving signal TDS2 corresponding to a DC voltage to multiple touch electrodes TE.

[0143] Reference Figure 8During the blanking time, the touch drive circuit TDC can provide a third touch electrode drive signal TDS3 with a third amplitude AMP3 to one or more of the multiple touch electrodes TE.

[0144] The driving mechanism corresponding to Case 1 can be executed within a single frame, or only for a certain duration within that frame. The driving mechanism corresponding to Case 2 can be executed across all frames or some frames, or only for a certain duration within a frame. In the driving mechanism corresponding to Case 3, either the driver for finger sensing or the driver for pen sensing can be executed.

[0145] Figure 10 This is a diagram illustrating the waveforms of the main signals TDS1, TDS2, TDS3, Vdata, VGL_M, and VGH_M in three cases (case 1, case 2, and case 3) of time-free driving in a touch display device according to an embodiment of the present disclosure.

[0146] Cases 1 and 2 are driving conditions during the display time. Case 3 is the driving condition during the blanking time.

[0147] For each of the three cases, the touch electrode drive signal TDS applied to the touch electrode TE, the data signal Vdata provided to the data line DL, and the cutoff level gating voltage VGL and the on level gating voltage VGH provided to the gating drive circuit GDC to generate the scan signal Vgate provided to the gating line GL.

[0148] In case 2, where display driving is performed during the display time, the touch electrode driving signal TDS applied to the touch electrode TE is a second touch electrode driving signal TDS2 in the form of DC voltage.

[0149] The data signal Vdata applied to the data line DL is a signal corresponding to the image analog signal converted from the image signal by digital-to-analog conversion for display purposes, and can be the pixel voltage applied to the pixel electrode of the sub-pixel SP through the data line DL. However, the data signal Vdata can be a voltage that varies between the driving voltage AVDD and the base voltage AVSS.

[0150] Each of the cutoff level gating voltage VGL and the on level gating voltage VGH that constitute the scan signal Vgate applied to the gating line GL is a corresponding DC voltage.

[0151] As described above, the touch electrode TE can also be used as a common electrode for display driving. Therefore, in case 2, where display driving is performed but touch sensing is not performed during display time, the second touch electrode driving signal TDS2 applied to the touch electrode TE corresponds to the common voltage used for display.

[0152] Therefore, an electric field can be formed between the pixel electrode and the touch electrode TE by 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 drive signal TDS2, which corresponds to the common voltage, applied to the touch electrode TE, so that the desired light can be emitted from the corresponding sub-pixel SP.

[0153] In case 3, where touch driving is performed but display driving is not performed during the blanking time, the touch electrode driving signal TDS applied to the touch electrode TE is a third touch electrode driving signal TDS3 with a third amplitude AMP3.

[0154] During the blanking time, the data signal Vdata corresponding to the DC voltage can be applied to the data line DL, or the data line DL can be in a floating state. During the blanking time, the scan signal Vgate of the cutoff level gating voltage VGL corresponding to the DC voltage can be applied to the gating line GL, or the gating line GL can be in an electrically floating state.

[0155] When no-load driving is performed during the blanking time of touch-only driving, from the perspective of voltage characteristics, the data line DL and the strobe line GL can swing like the touch electrode TE.

[0156] The data signal Vdata applied to the data line DL during the blanking time according to the no-load drive can be the third touch electrode drive signal TDS3 or a no-load drive signal with the same or similar signal characteristics (e.g., phase, frequency, and amplitude) as the third touch electrode drive signal TDS3.

[0157] The gate voltage VGL, which is applied to the cutoff level of the gate line GL during the blanking time according to the no-load drive, can be the third touch electrode drive signal TDS3 or a no-load drive signal with the same or similar signal characteristics (e.g., phase, frequency, and amplitude) as the third touch electrode drive signal TDS3.

[0158] In case 1, where display driving and touch driving are executed simultaneously during the display time, the touch electrode driving signal TDS applied to the touch electrode TE is a first touch electrode driving signal TDS1 with a first amplitude AMP1.

[0159] In Case 1, since display driving and touch driving are performed simultaneously during the display time, the first touch electrode driving signal TDS1 is a touch electrode driving signal for touch sensing and a display common voltage Vcom for forming a capacitor with the data signal Vdata.

[0160] The first touch electrode drive signal TDS1 applied to the touch electrode TE is also used to form a display common voltage Vcom with the data signal Vdata, which corresponds to the pixel voltage used for display.

[0161] The first touch electrode drive signal TDS1 applied to the touch electrode TE has a predetermined voltage difference for display with the data signal Vdata, which corresponds to the pixel voltage for display.

[0162] In case 1, where display driving and touch driving are executed simultaneously, the first touch electrode driving signal TDS1 performs two functions (as a driving signal for touch sensing and a common voltage for display).

[0163] Thus, since the common voltage Vcom corresponding to the first touch electrode drive signal TDS1 is not constant but variable, in addition to the original voltage change used for display, the data signal Vdata applied to the data line DL also needs an additional voltage change as high as the first amplitude AMP1 of the first touch electrode drive signal TDS1 to prevent or at least reduce the impact of touch drive on the data line DL.

[0164] In this case, the voltage difference between the data signal Vdata corresponding to the pixel voltage and the first touch electrode drive signal TDS1 only has the original voltage change for display, excluding the voltage change of the first touch electrode drive signal TDS1 (i.e., the first amplitude AMP1). Therefore, normal display is possible.

[0165] Therefore, the data signal Vdata in case 1, where display driving and touch driving are performed simultaneously, can be a combination of the data signal Vdata in case 2, where display driving is performed alone, and the first touch electrode driving signal TDS1.

[0166] In other words, the data signal Vdata in case 1, where display driving and touch driving occur simultaneously, can be a signal that offsets the data signal Vdata in case 2, where display driving occurs alone, via the first touch electrode driving signal TDS1. However, the data signal Vdata can be a voltage that varies between the driving voltage AVDD and the base voltage AVSS.

[0167] Therefore, the voltage difference between the data signal Vdata and the first touch electrode drive signal TDS1 in case 1, where touch driving and display driving are performed simultaneously, is the same as the voltage difference between the data signal Vdata and the second touch electrode drive signal TDS2 in case 2, where display driving is performed alone.

[0168] In case 1, since both the touch driver and the display driver are executed simultaneously, a no-load driver may be required.

[0169] In other words, in case 1, since touch driving and display driving are performed simultaneously, parasitic capacitance formed between the touch electrode TE and the data line DL through touch driving can be prevented or at least reduced, and parasitic capacitance formed between the touch electrode TE and the gate line GL through touch driving can also be prevented or at least reduced.

[0170] As described above, in Case 1, the voltages of the touch electrode TE and the data line DL vary (oscillate) according to the voltage change of the first touch electrode drive signal TDS1, such that only the voltage difference for display occurs between the touch electrode TE and the data line DL, and no parasitic capacitance is formed that is unnecessary for touch driving. In other words, in Case 1, no-load driving is performed for the data line DL.

[0171] In Case 1, for the gating drive circuit GDC that generates the scan signal Vgate applied to the gating line GL, the cut-off level gating voltage VGL and the on level gating voltage VGH provided to the gating drive circuit GDC can both be no-load drive signals with the same or similar signal characteristics (e.g., phase, frequency, and amplitude) as the first touch electrode drive signal TDS1.

[0172] In case 1, the data signal Vdata can be a signal modulated based on the first touch electrode drive signal TDS1. The scan signal Vgate can also be a signal modulated based on the first touch electrode drive signal TDS1.

[0173] The following describes in detail the time-free drive of a touch display device according to embodiments of the present disclosure described above.

[0174] Figure 11 This is a diagram illustrating a time-free drive system for a touch display device according to an embodiment of the present disclosure.

[0175] Reference Figure 11 A touch display device according to embodiments of the present disclosure may include: a display panel DISP having multiple data lines DL, multiple gate lines GL, and multiple touch electrodes TE; a gate driving circuit GDC electrically connected to the multiple gate lines GL and configured to drive the multiple gate lines GL; a data driving circuit DDC electrically connected to the multiple data lines DL and configured to drive the multiple data lines DL; and a touch driving circuit TDC electrically connected to the multiple touch electrodes TE and configured to drive the multiple touch electrodes TE.

[0176] Furthermore, the touch display device according to embodiments of the present disclosure may further include: a display controller DCTR that controls the driving operation of a data driving circuit DDC and a gating driving circuit GDC; and a touch controller TCTR that controls the driving operation of a touch driving circuit TDC, or uses sensing data output from the touch driving circuit TDC to calculate the presence or absence of a touch and / or the coordinates of the touch.

[0177] Furthermore, the touch display device according to embodiments of this disclosure may also include a power control circuit for power supply. The power control circuit may include a touch power integrated circuit (TPIC) and a power management integrated circuit (PMIC).

[0178] The touch power circuit TPIC can provide the touch electrode drive signal TDS required to drive the touch electrode TE to the touch drive circuit TDC.

[0179] The touch driving circuit TDC can provide touch electrode driving signals TDS1 or TDS3 for touch sensing to the touch electrode TE among a plurality of touch electrodes TE, based on a modulated signal (e.g., a pulse width modulation signal) received from the touch controller TCTR. The touch power circuit TPIC can provide the modulated signal (e.g., a pulse width modulation signal) received from the touch controller TCTR as a no-load driving signal to the unsensitized touch electrode TE among a plurality of touch electrodes TE. The touch electrode driving signal TDS1 or TDS3 applied to the touch electrode TE to be sensed and the no-load driving signal applied to the unsensitized touch electrode TE (which can be considered as the touch electrode driving signal TDS) can be the same signal.

[0180] The power management circuit PMIC can provide the touch power circuit TPIC with various voltages (AVDD, Vcom, VGH, or VGL) required for the touch power circuit TPIC to provide signals.

[0181] The power management circuit PMIC can provide the data drive circuit DDC with various DC voltages (such as AVDD and AVSS) required for the data drive of the DDC.

[0182] The touch controller TCTR can provide pulse width modulation (PWM) signals to output or generate various signals (e.g., TDS) in circuits such as touch power circuits (TPIC), touch drive circuits (TDC), or data drive circuits (DDC). The touch controller TCTR can be implemented as, for example, a microcontroller unit (MCU), a processor, etc.

[0183] The Touch Power Circuit (TPIC) can modulate and output the common voltage Vcom input from the Power Management Circuit (PMIC) based on a pulse width modulation (PWM) signal input from the Touch Controller (TCTR). Therefore, the TPIC can generate and output a common voltage pulse whose pulse width has been modulated according to the voltage pulse corresponding to the PWM signal.

[0184] The touch display device according to embodiments of the present disclosure may further include one or more level shifters L / S for changing the voltage level of various signals.

[0185] One or more level shifters L / S may be implemented separately from the data drive circuit DDC, gating drive circuit GDC, touch drive circuit TDC, touch power circuit TPIC, power management circuit PMIC, display controller DCTR, and touch controller TCTR, or may be included as one or more internal modules of one or more of the data drive circuit DDC, gating drive circuit GDC, touch drive circuit TDC, touch power circuit TPIC, power management circuit PMIC, display controller DCTR, and touch controller TCTR.

[0186] Reference Figure 11 The data drive circuit DDC may include a gamma block GMA required to convert the digital image signal input from the display controller DCTR into an analog image signal.

[0187] Reference Figure 11 In the touch display device according to the embodiments of the present disclosure, the display panel DISP, the data driving circuit DDC, the gating driving circuit GDC, and the touch driving circuit TDC can be grounded to the DC ground voltage GND.

[0188] Figure 12 This is a schematic illustration of a touch display device 100 according to an embodiment of the present disclosure.

[0189] Reference Figure 12 According to an embodiment of the present disclosure, a touch display device 100 includes a display panel DISP and a first driving circuit 1120 electrically connected to the display panel DISP.

[0190] The first driving circuit 1120 may be a circuit including the aforementioned data driving circuit DDC and touch driving circuit TDC. The first driving circuit 1120 can perform the functions of the aforementioned source driver integrated circuit SDIC. The first driving circuit 1120 is also referred to as a source driver readout integrated circuit (SRIC). The touch display device 100 may include one or more first driving circuits 1120.

[0191] The first driving circuit 1120 can be mounted on a substrate or circuit film to be electrically connected to the display panel DISP. For example, the first driving circuit 1120 can be mounted on a 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. Therefore, the first driving circuit 1120 and the display panel DISP can be electrically connected.

[0192] Reference Figure 12 The first driving circuit 1120 can provide data signals Vdata to multiple data lines DL positioned on the display panel DISP. The first driving circuit 1120 can apply a common voltage Vcom to multiple touch electrodes TE positioned on the display panel DISP. During the touch sensing period, the first driving circuit 1120 can provide touch electrode driving signals TDS to one or more of the multiple touch electrodes TE positioned on the display panel DISP.

[0193] Reference Figure 12 According to an embodiment of the present disclosure, the touch display device 100 includes a second driving circuit 1130 electrically connected to the display panel DISP.

[0194] The second drive circuit 1130 may be a circuit that includes the aforementioned gating drive circuit GDC.

[0195] The second driving circuit 1130 can be mounted on the circuit film or on the substrate. (Refer to...) Figure 12 For example, the second driving circuit 1130 can be mounted on the circuit film 1132. The second driving circuit 1130 can be electrically connected to the bonding pads of the display panel DISP in a chip-on-film (COF) manner.

[0196] Reference Figure 12 The touch display device 100 according to embodiments of the present disclosure may include at least one source printed circuit board (SPCB) 1110 required for circuit connection with the first driving circuit 1120. The touch display device 100 according to embodiments of the present disclosure may include a control printed circuit board (CPCB) 1140 configured to mount control components and various electronic devices.

[0197] In some cases, the first drive circuit 1120 may be mounted on at least one source printed circuit board 1110.

[0198] At least one source printed circuit board 1110 and a control printed circuit board 1140 can be electrically connected via at least one connecting member 1150.

[0199] The touch controller TCTR, power management circuit PMIC, display controller DCTR, and touch power circuit TPIC (e.g., signal generation circuit) can be mounted on the control printed circuit board 1140.

[0200] At least one connecting member 1150 may be a flexible printed circuit board (FPCB) or a flexible flat cable (FFC).

[0201] At least one source printed circuit board 1110 and control printed circuit board 1140 can be integrated into a single printed circuit board.

[0202] The display controller DCTR outputs a gating drive circuit control signal GCS, and the gating drive circuit control signal GCS is input to the second drive circuit 1130 through the bonding pads of the display panel DISP.

[0203] Reference Figure 12 The second driving circuit 1130 can receive signals from a corner area (e.g., the area of ​​the display panel DISP) located on the screen. Figure 12 The gating drive circuit control signal GCS is located in region X of the region. The second drive circuit 1130 can be located in the region between two different second drive circuits 1130 (e.g., Figure 12 The line in region Y receives the gating drive circuit control signal GCS.

[0204] However, the gating 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 circuit TPIC.

[0205] In other words, the Touch Power Circuit (TPIC) can receive a Pulse Width Modulation (PWM) signal and output a signal for no-load driving the LFD and / or a touch electrode drive signal (TDS). The signal output from the Display Controller (DCTR) is a signal not modulated according to the Pulse Width Modulation (PWM) signal.

[0206] Therefore, the accuracy of touch sensing may decrease in the area where the signal output from the display controller DCTR is located by the input line.

[0207] Reference Figure 12 The area where touch sensing accuracy is reduced may include the area adjacent to the line where the gating drive circuit control signal GCS is input. Such areas may include the area adjacent to the corner of the display panel DISP (e.g., area X) and the area adjacent to the bonding pads in the display panel DISP (e.g., area Y).

[0208] Therefore, a solution is needed to improve the accuracy of touch sensing in the corresponding area.

[0209] Figure 13 This is an example of a touch display device 100 according to an embodiment of the present disclosure. Figure 12 A magnified view of region X.

[0210] Reference Figure 13 The touch display device 100 according to embodiments of the present disclosure may include a first line 1360 to which a gating drive circuit control signal GCS is applied and a second line 1350 to which a pulse width modulation (PWM) signal output from a touch power circuit TPIC is applied. The pulse width modulation (PWM) signal may be a pulse width modulated common voltage pulse or a pulse width modulated display voltage pulse.

[0211] The first line 1360 can be electrically connected to the first pin 1330 and the second pin 1340. The strobe drive control signal GCS input to the first pin 1330 is output to the second pin 1340 through the first line 1360.

[0212] Reference Figure 13 The pulse width modulation signal can be transmitted via the second line 1350, or via a transition pattern (not shown) formed on the first substrate SUB1. The transition pattern may include one or more contact holes. The transition pattern may be positioned in the glass top line (LOG) region 1370 on the first substrate SUB1.

[0213] The first pin 1330 and the second pin 1340 can be positioned on the bonding pads of the display panel DISP. In some cases, the gating drive circuit can be arranged on the first substrate SUB1 as an in-panel gate type, and the signal input to the first pin 1330 can be transmitted to the gating drive circuit through the first line 1360. In this case, the second pin 1340 can be omitted.

[0214] Signals can be transmitted between two different gating drive circuits using the aforementioned transition pattern. For example, when a pulse width modulation (PWM) signal is output from either gating drive circuit configured as a gate in panel (GIP) type and transmitted to another gating drive circuit configured as a gate in panel (GIP) type, the PWM signal can be transmitted using the transition pattern.

[0215] Refer to together Figure 12 and Figure 13 The signal output from the display controller DCTR can be input to the first pin 1330. Alternatively, the signal output from the display controller DCTR can be input to the second pin 1340, and then output to the first pin 1330 through the second drive circuit 1130.

[0216] The signal applied to the first line 1360 can be any of the gating drive circuit control signals such as the gating start pulse GSP, the gating shift clock GSC, and the gating output enable signal GOE.

[0217] The second line 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 line 1350.

[0218] During the touch sensing period used for touch sensing, the pulse width modulation signal output from the touch power circuit TPIC can be input to the second line 1350.

[0219] The Touch Power Circuit (TPIC) can output a common voltage that is pulse-width modulated according to the voltage pulse corresponding to the pulse width modulation (PWM) signal, and the pulse width modulated common voltage pulse can be applied to the second line 1350.

[0220] A pulse-width modulated common voltage pulse is output from pin 4, 1320. The signal output to pin 4, 1320 can be input to the second drive circuit 1130. The second drive circuit 1130 can output the pulse-width modulated common voltage pulse to pin 3, 1310.

[0221] The Touch Power Circuit (TPIC) can output a display voltage pulse that is pulse-width modulated based on a voltage pulse corresponding to a pulse width modulation (PWM) signal. The display voltage may include, for example, a cutoff level gating voltage VGL or a turn-on level gating voltage VGH.

[0222] Therefore, the signal input to the second line 1350 can be a pulse-width modulated common voltage or a pulse-width modulated display voltage pulse.

[0223] The pulse width modulated common voltage can be a signal whose signal characteristics (e.g., phase, frequency, and amplitude) are the same as or similar to the touch electrode drive signal TDS input to at least one of the multiple touch electrodes TE during the touch sensing period.

[0224] For ease of description, it is assumed that the signal input to the second line 1350 is a pulse-width modulated common voltage, but this disclosure is not limited thereto.

[0225] Reference Figure 13 The first line 1360 and the second line 1350 can be set in the non-display area around the display area AA.

[0226] When the first substrate SUB1 is a glass substrate, the first line 1360 and the second line 1350 can be configured as a glass top line (LOG). Therefore, at least a portion of the non-display area can be a LOG area 1370. The first line 1360 and the second line 1350 can be located within the LOG area 1370. A first pin 1330, a second pin 1340, a third pin 1310, or a fourth pin 1320 can be located within the LOG area 1370.

[0227] Reference Figure 13 The first line 1360 and the second line 1350 can be arranged adjacent to each other. The second line 1350 can be positioned closer to the display area AA than the first line 1360.

[0228] Figure 14 This is a conceptual illustration of the parasitic capacitance formed at the touch electrode TE where a touch electrode drive signal TDS is applied in a touch display device 100 according to an embodiment of the present disclosure.

[0229] Reference Figure 14 Parasitic capacitance Cpara can be formed between the touch electrode TE to which the touch electrode drive signal TDS is applied and the second line 1350 positioned around the touch electrode TE. Parasitic capacitance Cpara' can be formed between the touch electrode TE to which the touch electrode drive signal TDS is applied and the first line 1360 positioned around the touch electrode TE.

[0230] Since the pulse width modulated common voltage can be applied to the second line 1350, the parasitic capacitance Cpara between the second line 1350 and the touch electrode TE to which the touch electrode drive signal TDS is applied is significantly smaller.

[0231] However, since the gate drive circuit control signal GCS is applied to the first line 1360, and these signals are output from the display controller DCTR, they are not pulse width modulation signals. Therefore, the effect caused by the parasitic capacitance Cpara' may exist between the touch electrode TE, to which the touch electrode drive signal TDS is applied, and the first line 1360, and the parasitic capacitance Cpara' may affect the touch sensing accuracy.

[0232] Factors affecting the parasitic capacitance Cpara' between the touch electrode TE and the first line 1360 can be insulators included in the touch display device 100. Such insulators may include, for example, a light-blocking layer 410, a high-resistivity oxide layer 420, and a liquid crystal LC. When the array substrate and the color filter substrate are joined together by a sealing member, the sealing member can also be a factor affecting the parasitic capacitance Cpara'.

[0233] Therefore, in the touch display device according to the embodiments of the present disclosure, the second line 1350 can be provided as wide (e.g., thick) as possible, and the aforementioned insulating material between the first line 1360 and the touch electrode TE can be provided as little as possible, so that even in the outermost periphery of the display area, the touch sensing accuracy can be increased.

[0234] Figure 15 This is a diagram illustrating an example of a touch display device according to an embodiment of the present disclosure, in which a wide line 1510 is positioned on a first substrate SUB1.

[0235] Reference Figure 15 The wide line 1510 can be positioned on the first substrate SUB1. The wide line 1510 is included in the aforementioned second line 1350. In the same sense, the second line 1350 having a wide width can be the wide line 1510. The second line 1350 having a wide width can mean having a width wider than the first line 1360. In one embodiment, the wide line 1510 has a width wider than the second line 1350. The wide line 1510 can be considered as a part of the second line 1350. Therefore, the second line 1350 can be considered as a first part, and the wide line 1510 can be considered as a second part of the second line 1350. The following description assumes that the second line 1350 having a wide width is the wide line 1510.

[0236] Wide line 1510 is electrically connected to each of pins 1310 and 1320. Viewed from the perspective of wide line 1510, the voltage input through pin 1310 is output through pin 1320.

[0237] The third pin 1310 and the fourth pin 1320, which are electrically connected to a wide line 1510, are respectively electrically connected to different second drive circuits 1130.

[0238] Reference Figure 15 The third pin 1310 and the fourth pin 1320 can be electrically connected to each other through the bypass circuit 1520.

[0239] Bypass circuit 1520 may specify a conductive line located on circuit film 1132. Bypass circuit 1520 may also include a level shifter for maintaining the amplitude of a common voltage pulse that has already experienced a voltage drop when passing through wide line 1510.

[0240] The bypass circuit 1520 can be a circuit configured separately from the second drive circuit 1130, but the bypass circuit 1520 and the second drive circuit 1130 can be configured as a single circuit. In some cases, the bypass circuit 1520 can be located inside the gating drive circuit GDC. In this case, the third pin 1310 and the fourth pin 1320 can be electrically connected to the gating drive circuit GDC.

[0241] Reference Figure 15 The touch display device according to embodiments of the present disclosure may include multiple link lines LL configured to electrically connect the second driving circuit 1130 and multiple gate lines GL. The multiple link lines LL may be located in the LOG region 1370.

[0242] Multiple link lines LL can extend in the opposite direction to the direction of the second drive circuit 1130 while being arranged on the first substrate SUB1 in a widely extended delta Δ shape.

[0243] The wide line 1510 can be positioned in an area that does not overlap with multiple link lines LL. The wide line 1510 can have a tapered V-shape. The wide line 1510 can have a sloping surface. The sloping surface can extend in a direction parallel to the link line LL adjacent to the wide line 1510 among the multiple link lines LL. Therefore, the wide line 1510 can be positioned as wide as possible in an area where multiple link lines LL are not located.

[0244] exist Figure 15 In the diagram, the wide line 1510 is shown as having a triangular shape, but the shape of the wide line 1510 can have various shapes within the range where it can fill an area with multiple unpositioned link lines LL. For example, the wide line 1510 can have a rectangular or pentagonal shape.

[0245] The wide line 1510 can have vertices that have been rounded to be blunt rather than sharp. In this case, the increase in charge density at the vertices can be reduced. Therefore, the increase in electric field at the vertices can be reduced. When the wide line 1510 has a polygonal shape including four or more vertices, the increase in charge density at the vertices can be further mitigated.

[0246] Although the wide line 1510 is described below as having a triangular shape as an example, the wide line 1510 is not limited to this.

[0247] Figure 16 This is a diagram illustrating an example of a touch display device according to an embodiment of the present disclosure, in which the first line 1360 and the second line 1350 are positioned in a non-display area.

[0248] The second line 1350 refers to a line that receives a signal that is pulse-width modulated according to a pulse-width modulation (PWM) signal, but it is not the wide line 1510. For example, if a pulse-width modulated common voltage is applied to the wide line 1510 during a touch sensing period, a pulse-width modulated display voltage (e.g., VGL or VGH) can be applied to the second line 1350. Alternatively, if any of the pulse-width modulated display voltage (e.g., VGL or VGH) pulses are applied to the wide line 1510 during a touch sensing period, a pulse-width modulated common voltage can be applied to the second line 1350. In this disclosure, the pulse-width modulated display voltage and the unpulse-width modulated display voltage are collectively referred to as the "display signal".

[0249] For ease of description, it is assumed below that a pulse-width modulated common voltage is applied to the wide line 1510 during the sensing period. It is also assumed below that either a pulse-width modulated display voltage (e.g., VGL or VGH) is applied to the second line 1350 during the sensing period. However, the touch display device according to embodiments of this disclosure is not limited thereto.

[0250] The width of the widest portion of the wide line 1510 can be greater than the width of the first line 1360 and the second line 1350. Therefore, compared to the wide line 1510, the first line 1360 and the second line 1350 can be referred to as narrow lines.

[0251] Reference Figure 16 The wide line 1510 can be positioned adjacent to the second line 1350. In other embodiments, the wide line 1510 can be positioned adjacent to the first line 1360.

[0252] The wide line 1510 can be positioned closer to the touch electrode TE than the first line 1360 and the second line 1350. Therefore, the wide line 1510 is located between the touch electrode TE and the first line 1360 and the second line 1350.

[0253] The first line 1360 and the second line 1350 may extend parallel to each other. The first line 1360 and the wide line 1510 may also extend parallel to each other. In other words, the first line 1360, the second line 1350, and the wide line 1510 may be lines that electrically connect two different second drive circuits. These lines can extend from any second drive circuit to another adjacent second drive circuit.

[0254] Reference Figure 16 The first line 1360, the second line 1350, and the wide line 1510 can be positioned in the LOG area 1370 surrounding the display area AA.

[0255] Therefore, in the peripheral area of ​​the touch display device, especially in the area where multiple touch electrodes TE are located adjacent to the second driving circuit, the accuracy of touch sensing can be greatly increased.

[0256] Figure 17 , Figure 18 , Figure 19 , Figure 20 and Figure 21 It is a touch display device according to an embodiment of the present disclosure along Figure 16 The cross-sectional view taken from I-I'.

[0257] Reference Figure 17 Describe it.

[0258] A touch display device according to an embodiment of the present disclosure may have a display area AA in which a plurality of sub-pixels are positioned and a LOG area 1370 located around the display area AA.

[0259] The display area AA is described. A metal layer M3 is positioned on the first substrate SUB1 to provide a common voltage Vcom or a touch electrode drive signal TDS to at least one of the plurality of touch electrodes TE. The metal layer M3 may be covered by a first planarization layer PAC1.

[0260] The thin-film transistor TR can be positioned on the first planarization layer PAC1. The thin-film transistor TR can be set in each of the multiple sub-pixels.

[0261] A thin-film transistor TR may include an active layer ACT and a gate G electrically connected to any one of a plurality of gate lines GL, wherein the gate G and the channel region are positioned to overlap each other.

[0262] The thin-film transistor TR may include source / drain electrodes SD electrically connected to the active layer ACT. The source / drain electrodes SD provide the data signal input to any one of the multiple data lines DL to the pixel electrode PXL.

[0263] The pixel electrode PXL can be positioned on the second planarization layer PAC2 covering the source / drain electrode SD.

[0264] Reference Figure 17 The touch electrode TE and the pixel electrode PXL can be positioned on the same layer on the second planarization layer PAC2. The rotation angle of the molecules in the liquid crystal LC can be adjusted according to the amplitude of the electric field formed between the touch electrode TE and the pixel electrode PXL. The light intensity of the sub-pixel can be adjusted according to the rotation angle of the molecules in the liquid crystal.

[0265] The liquid crystal LC can be positioned between the first substrate SUB1 and the second substrate SUB2. Specifically, the first substrate SUB1 and the second substrate SUB2 can be joined together by a sealing member 1630. The liquid crystal LC can be injected into the space formed by the joining via the sealing member 1630.

[0266] When the display device according to the embodiments of the present disclosure is an organic light-emitting display device including an organic light-emitting element, the display device may omit the liquid crystal, and the light intensity of the sub-pixel can be adjusted according to the amount of current flowing through the organic light-emitting element.

[0267] Although the following description illustrates an example of a display device according to an embodiment of the present disclosure as a liquid crystal display, the present disclosure is not limited thereto.

[0268] The second substrate SUB2 is positioned opposite to the first substrate SUB1. A light-blocking layer 410 for separating multiple sub-pixels and a color filter layer CF including a color filter can be positioned on one surface of the second substrate SUB2.

[0269] Reference Figure 17 The high-resistivity oxide layer 420 can be positioned on the other surface of the second substrate SUB2.

[0270] The high-resistivity oxide layer 420 can be configured to extend from the other surface of the second substrate SUB2 to the LOG region 1370.

[0271] The light-blocking layer 410 can be positioned in the LOG area 1370 to prevent or at least reduce light leakage through the edge of the display area AA.

[0272] To further suppress light leakage, the light leakage prevention layer 1650 can also be disposed on the first substrate SUB1.

[0273] The light leakage prevention layer 1650 is positioned to overlap with the light-blocking 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-blocking layer 410. The light leakage prevention layer 1650 may include black pigment or colored pigment other than black pigment.

[0274] The sealing member 1630 can be positioned in the LOG area 1370. The sealing member 1630 can be positioned to overlap with the light-blocking layer 410 and the light-leakage-proof layer 1650.

[0275] Reference Figure 17 The first line 1360 is positioned outside the sealing member 1630.

[0276] In a touch display device according to an embodiment of the present disclosure, a low dielectric constant material may be disposed in a region 1640 on the first line 1360 to mitigate the reduction in touch sensing accuracy caused by parasitic capacitance formed between the touch electrode TE to which a touch electrode drive signal TDS is applied and the first line 1360 to which a gating drive circuit control signal GCS is applied.

[0277] Alternatively, region 1640 on the first line 1360 can be an empty space. In this case, region 1640 between the first line 1360 and the second substrate SUB2 can be filled with air.

[0278] A low dielectric constant material can mean a material having a dielectric constant lower than that of at least one of the liquid crystal LC, the light-blocking layer 410, and the sealing member 1630. In one embodiment, a low dielectric constant material can mean a material having a dielectric constant lower than that of any one of the liquid crystal LC, the light-blocking layer 410, and the sealing member 1630.

[0279] For example, in a typical application environment of a touch display device, the dielectric constant of the liquid crystal LC may be approximately 8.7 (F / m), the dielectric constant of the light-blocking layer 410 may be approximately 4 (F / m), and the dielectric constant of the sealing member 1630 may be approximately 2.8 (F / m).

[0280] The dielectric constant of air can be approximately 1.00059. Therefore, air can be associated with materials with low dielectric constants.

[0281] Reference Figure 17 Air (instead of the sealing member 1630 and the liquid crystal LC) can be positioned in the region 1640 between the first line 1360 and the second substrate SUB2. Therefore, the parasitic capacitance formed between the touch electrode TE and the first line 1360 can be reduced.

[0282] The wide line 1510, to which a pulse-width modulated common voltage is applied, can be positioned to overlap with the sealing member 1630, the liquid crystal LC, and the light-blocking layer 410. Therefore, even when a material with a relatively high dielectric constant is positioned on the wide line 1510, the accuracy of touch sensing is not reduced.

[0283] Therefore, the touch display device according to the embodiments of the present disclosure can enhance the touch sensing accuracy in the display area AA adjacent to the LOG area 1370.

[0284] Reference Figure 18In the touch display device according to an embodiment of the present disclosure, the sealing member 1630 can contact the wide line 1510 in the LOG area 1370. Therefore, the light leakage prevention layer 1650 can be positioned inside the sealing member 1630 without overlapping with the sealing member 1630.

[0285] Reference Figure 19 In the touch display device according to embodiments of the present disclosure, one end of the light-blocking layer 410 may be positioned to overlap with or be positioned inside the sealing member 1630. In other words, at least a portion of the sealing member 1630 may be positioned not to overlap with the light-blocking layer 410.

[0286] For example, at least a portion of the sealing member 1630 may contact the second substrate SUB2. One end of the light-blocking layer 410 may be positioned between the sealing member 1630 and the second substrate SUB2 or positioned inside the sealing member 1630.

[0287] exist Figure 19 In the disclosed implementation method, with Figure 18 Compared to the disclosed embodiment, the light-blocking layer 410 (which is a material with a relatively high dielectric constant) can be removed from region 1640 on the first line 1360. Therefore, an advantage can be gained in terms of touch sensing accuracy.

[0288] Reference Figure 20 In a 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 line 1360 and / or the second line 1350 in the LOG region 1370. The light leakage prevention layer 1650 can be interposed between the first line 1360 and the second substrate SUB2. Figure 20 In the implementation method, with Figure 18 Compared to the previous implementation, the light leakage prevention layer 1650 can also be disposed on the first line 1360 and / or the second line 1350. Therefore, the light leakage prevention layer 1650 can prevent or at least reduce damage to the first line 1360 and / or the second line 1350.

[0289] Reference Figure 21In the touch display device according to an embodiment of the present disclosure, the light leakage prevention layer 1650 may be positioned to overlap with the second line 1350 and / or the first line 1360 in the LOG region 1370. The sealing member 1630 may be positioned to overlap with the second line 1350. For example, the light leakage prevention layer 1650 may be positioned on the second line 1350 but not on the first line 1360. One end of the light leakage prevention layer 1650 and one end of the sealing member 1630 may be aligned with each other. One end of the light leakage prevention layer 1650 and one end of the sealing member 1630 may be positioned inside the first line 1360. One end of the light leakage prevention layer 1650 and one end of the sealing member 1630 may be positioned on the second line 1350. The light blocking layer 410 may be positioned to overlap with the first line 1360, or it may be positioned inside the first line 1360 without overlapping it.

[0290] Reference Figure 21 During the touch sensing period, a pulse-width modulated display voltage (e.g., VGL or VGH) pulse can be applied to the second line 1350. Therefore, materials with relatively high dielectric constants (e.g., liquid crystal LC, light-blocking layer 410, sealing member 1630) are positioned to interact with the lines (e.g., second line 1350, wide line 1510, and link line LL) to which the pulse-width modulated signal is applied during the touch sensing period. Figure 15 The overlapping of these components reduces the impact of parasitic capacitance. In other words, as an effect of no-load drive, the parasitic capacitance (refer to...) Figure 14 The “Cpara” in the text is reduced.

[0291] Furthermore, since a low-dielectric-constant material is disposed on the first line 1360 when no pulse-width modulation signal is applied during the touch sensing period, or the empty space is filled with air, the effect of parasitic capacitance caused by the first line 1360 is minimized. In other words, parasitic capacitance (refer to...) Figure 14 The “Cpara” in the equation is minimized by reducing the dielectric constant.

[0292] For the reasons described above, the touch display device according to the embodiments of this disclosure can enhance touch sensing accuracy.

[0293] Figure 22A and Figure 22B This is a diagram illustrating an example of a non-display area in which two or more first lines 1360 and two or more second lines 1350 are positioned in a touch display device according to an embodiment of the present disclosure.

[0294] Reference Figure 22A and Figure 22BIn a touch display device according to an embodiment of the present disclosure, two or more first lines 1360 and two or more second lines 1350 may be provided in the LOG area 1370.

[0295] In the touch display device according to embodiments of the present disclosure, such as Figure 22B As shown, in the LOG region 1370, two or more first lines 1360 can be positioned adjacent to each other, and two or more second lines 1350 can be positioned adjacent to each other.

[0296] In the touch display device according to embodiments of the present disclosure, such as Figure 22A As shown, in the LOG region 1370, one or more second lines 1350 may be positioned between two or more first lines 1360, or two or more first lines 1360 may be positioned between two or more second lines 1350.

[0297] Reference Figure 22A and Figure 22B The wide line 1510 can be positioned closer to the display area AA than two or more first lines 1360. The wide line 1510 can be positioned closer to the display area AA than two or more second lines 1350.

[0298] Figure 23A The touch display device according to embodiments of the present disclosure is along Figure 22A The cross-sectional view taken from section II-II'; and Figure 23B It is along Figure 22B The cross-sectional view taken from section II-II'.

[0299] Reference Figure 23A and Figure 23B At least a portion of the liquid crystal LC having the highest dielectric constant may be configured to overlap with the wide line 1510. At least a portion of the liquid crystal LC may be configured to overlap with the second line 1350 on which a pulse width modulation signal is input during the touch sensing period.

[0300] The sealing member 1630 may be positioned to overlap with the wide line 1510 (not shown) and may be positioned to overlap with the second line 1350. A portion of the sealing member 1630 may be positioned to overlap with the first line 1360.

[0301] A low-dielectric-constant material can be positioned in the region 1640 between the first line 1360 and the second substrate SUB2. As described above, the low-dielectric-constant material can be, for example, air.

[0302] Reference Figure 23A and Figure 23BThe light-blocking layer 410 can be positioned to overlap with the first line 1360, or it can be configured inside the sealing member 1630 to not overlap with the first line 1360 (not shown).

[0303] exist Figure 23A and Figure 23B The embodiments of the touch display device disclosed herein, including two or more first lines 1360 and two or more second lines 1350, are merely examples, and this disclosure is not limited thereto. For example, when the touch display device includes two or more first lines 1360 and two or more second lines 1350, the above-described embodiments... Figures 17 to 21 The described implementation methods are equally applicable.

[0304] Therefore, the touch display device according to the embodiments of the present disclosure can significantly enhance the accuracy of touch sensing in the peripheral area.

[0305] The above-described implementation method is briefly described below.

[0306] Embodiments of this disclosure may provide a touch display device 100, comprising: a display panel DISP having multiple data lines DL, multiple gate lines GL, and multiple sub-pixels SP positioned in a display area AA; multiple touch electrodes TE positioned to overlap with at least one sub-pixel SP; a touch power circuit TPIC generating and outputting a signal pulse width modulated according to a voltage pulse corresponding to an input pulse width modulation (PWM) signal; a gate drive circuit GDC providing a scan signal Vgate to the multiple gate lines GL; a display controller DCTR outputting a gate drive circuit control signal GCS for controlling the drive timing of the gate drive circuit GDC; a first line 1360 positioned in a non-display area 1370 surrounding the display area AA in the display panel DISP and receiving the gate drive circuit control signal GCS; and a second line 1350 positioned in the non-display area 1370, having a width greater than that of the first line 1360 and receiving the pulse width modulation signal.

[0307] Embodiments of this disclosure may provide a touch display device 100, wherein a second line 1350 is positioned adjacent to a first line 1360 and electrically connected to a gating drive circuit GDC.

[0308] Embodiments of this disclosure may provide a touch display device 100, which further includes an electrically connected gating drive circuit GDC and multiple link lines LL of multiple gating lines GL, wherein a second line 1350 is positioned adjacent to the multiple link lines LL.

[0309] Embodiments of this disclosure may provide a touch display device 100, wherein the second line 1350 has a surface inclined in a direction corresponding to the direction in which the link line LL closest to the second line is disposed among a plurality of link lines LL.

[0310] Embodiments of this disclosure may provide a touch display device 100, wherein the display panel DISP includes: a first pin 1330 configured to apply a gating drive circuit control signal GCS to a first line 1360; a second pin 1340 outputting the gating drive circuit control signal GCS applied to the first line 1360; a third pin 1310 configured to apply a pulse width modulation signal to a second line 1350; and a fourth pin 1320 outputting the pulse width modulation signal applied to the second line 1350.

[0311] Embodiments of this disclosure may provide a touch display device 100, which further includes: a first driving circuit 1120 that provides a touch electrode driving signal TDS, which is the same as or corresponds to a pulse width modulation signal, to at least one of a plurality of touch electrodes TE during a touch sensing period; and a second driving circuit 1130 that includes a gating driving circuit GDC, wherein the second driving circuit 1130 further includes a bypass circuit 1520 that electrically connects a third pin 1310 and a fourth pin 1320.

[0312] Embodiments of this disclosure may provide a touch display device 100, wherein the display panel DISP includes: a first substrate SUB1, wherein a plurality of sub-pixels SP and a plurality of touch electrodes TE are positioned on the first substrate SUB1; a second substrate SUB2 having a surface on which a light-blocking layer 410 for separating the plurality of sub-pixels SP is positioned; and a sealing member 1630 configured to engage the first substrate SUB1 and the second substrate SUB2.

[0313] Embodiments of this disclosure may provide a touch display device 100, wherein a sealing member 1630 is positioned to overlap with a second line 1350.

[0314] Embodiments of this disclosure may provide a touch display device 100, wherein a first line 1360 is positioned outside the sealing member 1630 in an area that does not overlap with the sealing member 1630.

[0315] Embodiments of this disclosure may provide a touch display device 100, wherein a first line 1360 is positioned so as not to overlap with the light-blocking layer 410.

[0316] Embodiments of this disclosure may provide a touch display device 100, which further includes a light leakage prevention layer 1650 positioned on a second layer to overlap with the light blocking layer 410.

[0317] Embodiments of this disclosure may provide a touch display device 100, wherein a first line 1360 is positioned to overlap with a light-leakage prevention layer 1650.

[0318] Embodiments of this disclosure may provide a touch display device 100, which further includes a liquid crystal LC positioned in a region surrounded by a sealing member 1630, the liquid crystal being located between a first substrate SUB1 and a second substrate SUB2, wherein a light leakage prevention layer 1650, the liquid crystal LC, and a light blocking layer 410 are positioned on a second line 1350.

[0319] Embodiments of this disclosure may provide a touch display device 100, wherein the material located in the region between the first line 1360 and the second substrate SUB2 has a smaller dielectric constant than the material located in the region between the second line 1350 and the second substrate SUB2.

[0320] Embodiments of this disclosure may provide a touch display device 100, which further includes a high-resistivity oxide layer (or oxide film) 420 positioned on another surface of a second substrate SUB2 to overlap with a second line 1350.

[0321] Embodiments of this disclosure may provide a touch display device 100, wherein a high-resistivity oxide layer 420 is positioned to overlap with a first line 1360.

[0322] Embodiments of this disclosure may provide a touch display device 100, wherein a touch power circuit TPIC generates and outputs a display voltage (e.g., VGL or VGH) pulse that is pulse-width modulated according to a voltage pulse corresponding to an input pulse width modulation (PWM) signal, and wherein a gate drive circuit GDC receives the pulse-width modulated display voltage (e.g., VGL or VGH) pulse to generate and output a scan signal Vgate.

[0323] Embodiments of this disclosure may provide a touch display device 100, comprising: a display panel DISP having multiple data lines DL, multiple gating lines GL, and multiple sub-pixels SP positioned in a display area AA; multiple touch electrodes TE positioned to overlap with at least one sub-pixel SP; a touch power circuit TPIC outputting a signal and a display signal that are pulse-width modulated according to a voltage pulse corresponding to an input pulse-width modulation signal; and a gating drive circuit GDC receiving the display signal to generate a display signal. The system comprises: a scan signal Vgate that is provided to multiple gate lines GL; a display controller DCTR that outputs a gate drive circuit control signal GCS for controlling the drive timing of the gate drive circuit GDC; a first line 1360 located in a non-display area 1370 surrounding the display area AA in the display panel DISP and receiving the gate drive circuit control signal GCS; and a second line 1350 located in the non-display area 1370, having a width greater than that of the first line 1360, and receiving a pulse width modulated signal or a display signal.

[0324] Embodiments of this disclosure may provide a touch display device 100, wherein the display panel DISP includes: a first substrate SUB1, wherein a plurality of sub-pixels SP and a plurality of touch electrodes TE are positioned on the first substrate; a second substrate SUB2 having a surface on which a light-blocking layer 410 for separating the plurality of sub-pixels SP is positioned; and a sealing member 1630 configured to engage the first substrate SUB1 and the second substrate SUB2, wherein the sealing member 1630 is positioned to overlap with a second line 1350.

[0325] Embodiments of this disclosure may provide a touch display device 100, wherein the material located in the region between the first line 1360 and the second substrate SUB2 has a smaller dielectric constant than the material located in the region between the second line 1350 and the second substrate SUB2.

[0326] The above description has been presented to enable any person skilled in the art to make and use the technical ideas of this disclosure, and has been provided in the context of a particular application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this disclosure. The above description and drawings provide examples of the technical ideas of this disclosure for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical ideas of this disclosure. Therefore, the scope of this disclosure is not limited to the embodiments shown, but should be given the widest scope consistent with the claims. The scope of protection of this disclosure may be interpreted based on the appended claims, and all technical concepts within the scope of their equivalents may be interpreted as being included within the scope of this disclosure.

[0327] Cross-references to related applications

[0328] This application claims priority to Korean Patent Application No. 10-2021-0186393, filed on December 23, 2021, which is incorporated herein by reference in its entirety.

Claims

1. A touch display device, the touch display device comprising: The display panel includes multiple data lines, multiple gate lines, multiple sub-pixels located in the display area of ​​the display panel, and multiple touch electrodes overlapping with at least one of the multiple sub-pixels; A touch power circuit configured to generate and output a pulse width modulated signal based on a voltage pulse, the voltage pulse corresponding to an input pulse width modulated signal; A gating drive circuit, configured to provide a scanning signal to the plurality of gating lines; The display controller is configured to output a gating drive circuit control signal, the gating drive circuit control signal controlling the driving timing of the gating drive circuit; A first line, located in the non-display area of ​​the display panel, receives the control signal from the gating drive circuit; as well as The second line, located in the non-display area, includes a first type of second line and a second type of second line, the second type of second line being wider than the first type of second line. The second line receives the pulse-width modulated signal. In this case, the width of the second line in the second type is larger than the width of the first line. The display panel includes: A first substrate, wherein the plurality of sub-pixels and the plurality of touch electrodes are disposed on the first substrate; A second substrate, the second substrate facing the first substrate; and A sealing member configured to bond the first substrate and the second substrate together, and Wherein, at least one side of the first type second line and one side of the second type second line extend parallel to each other, and the sealing member does not overlap with the first type second line adjacent to the sealing member but overlaps with a portion of the second type second line adjacent to the sealing member.

2. The touch display device according to claim 1, wherein, The second type of second line is adjacent to the first line and is electrically connected to the gating drive circuit.

3. The touch display device according to claim 1, further comprising: Multiple connecting lines electrically connect the gating drive circuit and the multiple gating lines; In this case, the second line of the second type is adjacent to the plurality of link lines.

4. The touch display device according to claim 3, wherein, The second type of second line has a surface parallel to the link line closest to the second type of second line among the plurality of link lines, such that the surface is inclined.

5. The touch display device according to claim 1, wherein, The display panel includes: A first pin, configured to apply the gating drive circuit control signal to the first line; The second pin is configured to output the strobe drive circuit control signal applied to the first line; A third pin, configured to apply the signal pulse-width modulated according to the voltage pulse to the second type of second line; and The fourth pin is configured to output the pulse-width modulated signal applied to the second line of the second type.

6. The touch display device according to claim 5, further comprising: A first driving circuit is configured to provide a touch electrode driving signal to at least one of the plurality of touch electrodes during a touch sensing period, corresponding to the signal pulse-width modulated according to the voltage pulse. as well as A second driving circuit, the second driving circuit including the gating driving circuit; The second driving circuit further includes a bypass circuit configured to electrically connect the third pin and the fourth pin.

7. The touch display device according to claim 1, wherein, The light-blocking layer, which separates the multiple sub-pixels, is located on the second substrate.

8. The touch display device according to claim 1, wherein, The portion of the second line of the second type that overlaps with the sealing member is located between the portions that do not overlap with the sealing member.

9. The touch display device according to claim 7, wherein, The first line does not overlap with the sealing member.

10. The touch display device according to claim 7, wherein, The first line does not overlap with the light-blocking layer.

11. The touch display device according to claim 7, further comprising: A light leakage prevention layer is located on the first substrate, and the light leakage prevention layer overlaps with the light blocking layer.

12. The touch display device according to claim 11, wherein, The first line overlaps with the light-proof layer.

13. The touch display device according to claim 11, further comprising: Liquid crystal, the liquid crystal being located in the region surrounded by the sealing member, the liquid crystal being located between the first substrate and the second substrate; The light-proof layer, the liquid crystal, and the light-blocking layer overlap with the second line.

14. The touch display device according to claim 7, wherein, The material located in the region between the first line and the second substrate has a smaller dielectric constant than the material located in the region between the second line and the second substrate.

15. The touch display device according to claim 7, further comprising: An oxide film is located on a surface of the second substrate that is different from the light-blocking layer, and the oxide film overlaps with the second line.

16. The touch display device according to claim 15, wherein, The oxide film overlaps with the first line.

17. The touch display device according to claim 1, wherein, The touch power circuit is also configured to generate and output a display voltage pulse that is pulse-width modulated according to the voltage pulse, the voltage pulse corresponding to the input pulse-width modulation signal, and The gating drive circuit receives a pulse width modulated display voltage pulse and uses the pulse width modulated display voltage pulse to generate and output the scan signal.

18. A touch display device, the touch display device comprising: The display panel includes multiple data lines, multiple gate lines, multiple sub-pixels located in the display area of ​​the display panel, and multiple touch electrodes overlapping with at least one of the multiple sub-pixels; One or more signal generation circuits are configured to generate a first signal and one or more second signals, wherein the first signal is not pulse-width modulated and is used for display driving during a display period, and the one or more second signals are pulse-width modulated and are used for touch sensing during a touch sensing period and for display driving during the display period; A first line, located in the non-display area of ​​the display panel, receives the first signal without pulse width modulation; as well as The second line, located in the non-display area of ​​the display panel, includes a first type of second line and a second type of second line, wherein the width of the second type of second line is larger than the width of the first type of second line, and the second line receives a second signal from one or more second signals modulated by pulse width modulation. In this case, the width of the second line in the second type is wider than the width of the first line. The display panel includes: A first substrate, wherein the plurality of sub-pixels and the plurality of touch electrodes are disposed on the first substrate; A second substrate, the second substrate facing the first substrate; and A sealing member configured to bond the first substrate and the second substrate together, and Wherein, at least one side of the first type second line and one side of the second type second line extend parallel to each other, and the sealing member does not overlap with the first type second line adjacent to the sealing member but overlaps with a portion of the second type second line adjacent to the sealing member.

19. The touch display device according to claim 18, wherein, The second signal is one of a pulse-width modulated common voltage applied to the plurality of touch electrodes during the display period or a pulse-width modulated display voltage applied to the second line during the touch sensing period, and The first signal includes a gating drive control signal, which is generated by a gating drive circuit included in one or more signal generation circuits based on the gating drive control signal, and the gating signal is applied to the plurality of gating lines during the display period.

20. The touch display device according to claim 18, wherein, The second type of second line includes a first part and a second part, wherein the second part has a width that is wider than the width of the first line.

21. The touch display device according to claim 20, wherein, The first portion of the second type of second line is located between the first line and the second portion of the second type of second line in the plan view of the touch display device.

Images