Touch sensing display device and method for driving the touch sensing display device

Abstract

Reduces crosstalk between the display and touch, improving touch performance and display image quality. [Solution] A touchscreen panel comprising a display panel and a first touch electrode arranged along a first direction on which data lines extend, a second touch electrode arranged along a second direction intersecting the first direction, a first compensation electrode surrounded by each of the first touch electrodes, and a second compensation electrode surrounded by each of the second touch electrodes; a touch circuit that drives the first touch electrode and the second touch electrode to sense touch input to a touch sensor; and a compensation circuit that supplies compensation voltages to the first compensation electrode and the second compensation electrode to compensate for crosstalk in accordance with fluctuations in the data voltage while the touch input is being sensed.

Description

Technical Field

[0001] The present disclosure relates to a touch sensing display device and a driving method thereof.

Background Art

[0002] As the thickness of the display panel decreases, the parasitic capacitance between the data line and the touch electrode increases. The parasitic capacitance can be a path for injecting touch noise into the touch sensor.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The larger the parasitic capacitance or the more abrupt the change in the data voltage pattern, the more the crosstalk between display (display) and touch increases, which can degrade touch performance and display image quality.

Means for Solving the Problems

[0004] The touch sensing display device according to the present disclosure includes a touch screen panel located on a display panel and including first touch electrodes arranged along a first direction in which data lines extend, second touch electrodes arranged along a second direction intersecting the first direction, first compensation electrodes surrounded by respective ones of the first touch electrodes, and second compensation electrodes surrounded by respective ones of the second touch electrodes, a touch circuit that drives the first touch electrodes and the second touch electrodes to sense a touch input to the touch sensor, and a compensation circuit that supplies a compensation voltage for compensating crosstalk in response to fluctuations in a data voltage to the first compensation electrodes and the second compensation electrodes while the touch input is being sensed.

[0005] Furthermore, the method for driving a touch sensing display device according to this disclosure includes the steps of: outputting a data voltage for driving a plurality of pixels of the display panel to the data line of the display panel; driving a first touch electrode and a second touch electrode to sense a touch input to a touch sensor; and supplying a compensation voltage corresponding to the data voltage to a first compensation electrode surrounded by each of the first touch electrodes and a second compensation electrode surrounded by each of the second touch electrodes on the touchscreen panel while the touch input is being sensed. [Effects of the Invention]

[0006] According to this disclosure, by supplying a compensation voltage to the compensation electrode to compensate for crosstalk caused by fluctuations in data voltage while touch input is being sensed, crosstalk between the display and the touch can be reduced, thereby improving touch performance and display image quality.

[0007] According to this disclosure, it is possible to reduce crosstalk between the display and touch, thereby improving touch performance and display image quality.

[0008] The effects of this disclosure are not limited to those exemplified above, and various other effects are described herein. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram illustrating the touch sensing display device related to this disclosure. [Figure 2A] This figure shows that the touch electrode layer and the display electrode layer are coupled via the cathode electrode layer. [Figure 2B] This figure shows that the touch electrode layer and the display electrode layer are coupled via the cathode electrode layer. [Figure 3] This figure shows the display and touch-to-touch crosstalk according to the displayed image pattern. [Figure 4] This is a diagram showing one form of a compensation unit. [Figure 5] This figure shows that the first compensation electrode and the second compensation electrode, which constitute one compensation unit shown in Figure 4, are electrically connected. [Figure 6] This diagram shows an example where compensation voltages are supplied independently to each of multiple compensation units. [Figure 7] This is a diagram showing another form of a single compensation unit. [Figure 8] This figure shows that the first compensation electrode and the second compensation electrode, which constitute one compensation unit shown in Figure 7, are electrically connected. [Figure 9] This figure shows an example in which the first touch electrode, the second touch electrode, and the first and second compensation electrodes are each represented by a conductive mesh pattern. [Figure 10] This figure shows a cross-section taken along the line A-A' shown in Figure 9. [Figure 11] This figure shows a cross-section taken along the line B-B' shown in Figure 9. [Figure 12] This figure shows one embodiment in which a compensation electrode and a compensation pad are electrically connected via a compensation routing line. [Figure 13] This is a diagram showing the configuration of the compensation circuit. [Figure 14] This is a diagram showing the configuration of the compensation circuit. [Figure 15] This diagram shows the operation of the compensation circuit. [Figure 16] This figure shows an example where the data voltage and compensation voltage change in opposite phases. [Modes for carrying out the invention]

[0010] The advantages and features of this specification, and the methods for achieving them, will become apparent by referring to the embodiments described in detail hereinafter together with the accompanying drawings. However, this specification is not limited to the embodiments disclosed hereinafter, but can be embodied in various forms. Merely, this embodiment is provided to complete the disclosure of this specification and to fully inform those with ordinary knowledge in the technical field to which this specification belongs of the scope of the invention. This specification is only defined by the claims.

[0011] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are exemplary and are not limited to the matters shown in this specification. Throughout the specification, the same reference numerals refer to the same components. When terms such as "including", "having", "achieved", etc. mentioned in this specification are used, other parts can be added unless "only" is used. When a component is expressed in the singular, it includes the case of including a plurality unless there is a particularly explicit description.

[0012] When interpreting a component, it is interpreted as including an error range even if there is no separate explicit description.

[0013] In the case of an explanation of a positional relationship, for example, when the positional relationship between two parts is explained by "on", "above", "below", "next to", etc., there may be one or more other parts located between the two parts unless "right" or "directly" is used. First, second, etc. can be used to describe various components. However, these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned hereinafter can be the second component within the technical idea of this specification.

[0014] Hereinafter, embodiments of the present specification will be described in detail with reference to the accompanying drawings. In the following description, if it is determined that a specific description of a known function or configuration related to the present specification may unnecessarily obscure the gist of the present specification, the detailed description thereof will be omitted.

[0015] FIG. 1 is a diagram schematically showing a touch-sensing display device according to the present disclosure.

[0016] Referring to FIG. 1, a touch-sensing display device 100 according to an embodiment of the present invention may provide a display function for displaying an input video on a screen, a touch-sensing function for sensing a user's touch input, and a crosstalk compensation function for reducing crosstalk between a display (display) and a touch.

[0017] The touch-sensing display device 100 may include a display panel 110 in which data lines and gate lines are arranged, a display driving circuit 120 for driving the display panel 110, etc., in order to realize the display function.

[0018] The display panel 110 may be realized by an LCD (Liquid Crystal Display) panel, an OLED (Organic Light Emitting Display) panel, etc. Although the present disclosure exemplifies that the display panel 110 is embodied by an OLED panel, the technical idea of the present invention may also be applied to an LCD panel.

[0019] The display panel 110 includes multiple pixels. Each pixel may be realized by a pixel circuit connected to data lines and gate lines via a TFT (Thin Film Transistor). The pixel circuit may include a light-emitting element, a drive transistor, one or more switch transistors and capacitors, etc. The light-emitting element may be realized by an OLED (Organic Light Emitting Diode) in which an organic compound layer is placed between the cathode electrode and the anode electrode. The drive current flowing through the light-emitting element may be adjusted according to the gate-source voltage of the drive transistor. The gate-source voltage of the drive transistor may be determined by the data voltage corresponding to the input image data.

[0020] The display driving circuit 120 may include a data driving circuit that supplies data voltages to the data lines of the display panel 110 in order to drive the pixels of the display panel 110, a gate driving circuit that supplies gate signals to the gate lines of the display panel 110, and a timing controller 140 (TCON) for controlling the data driving circuit and the gate driving circuit. The display driving circuit 120 may be implemented by one or more integrated circuits.

[0021] The data drive circuit can supply data voltages to the data lines of the display panel 110 according to the drive timing control of the timing controller 140 (TCON). The gate drive circuit can supply gate signals to the gate lines of the display panel 110 according to the drive timing control of the timing controller 140 (TCON).

[0022] The touch sensing display device 100 may include a touchscreen panel TSP on which multiple touch electrodes TE are arranged, and a touch circuit 200 that drives the touchscreen panel TSP, in order to realize a touch sensing function.

[0023] As an example, the touchscreen panel TSP may also further include multiple touch lines for electrically connecting multiple touch electrodes to the touch circuit 200. The touchscreen panel TSP may be mounted on the outside of the display panel 110 in the form of a touch panel, or it may be incorporated inside the display panel 110. When the touchscreen panel TSP is mounted on the outside of the display panel 110 in the form of a touch panel, such a touchscreen panel TSP is sometimes called an add-on type. When an add-on type touchscreen panel TSP is placed in the touch sensing display device 100, the touch panel and the display panel 110 may be manufactured separately and combined during the assembly process.

[0024] The touch electrodes TE arranged on the touchscreen panel TSP include a first touch electrode YTE arranged along a first direction (y), which is the direction in which the data lines of the display panel 110 extend, and a second touch electrode XTE arranged along a second direction (x) that intersects the first direction y. Multiple touch sensors can be realized by the first touch electrode YTE and the second touch electrode XTE.

[0025] The touchscreen panel TSP may be manufactured separately from the display panel 110 and be an external type bonded to the display panel 110, or it may be manufactured together with the display panel 110 and be an internal type located on top of the display panel 110. In this embodiment, the touchscreen panel TSP is internal.

[0026] The touch circuit 200 may include a touch drive unit 210 that supplies a touch drive signal to the touchscreen panel TSP, and a touch sensing unit 220 that receives a touch sensing signal from the touchscreen panel TSP. The touch circuit 200 senses touch input to the touch sensor by driving a first touch electrode YTE and a second touch electrode XTE.

[0027] The touch sensing unit can perform touch sensing. For example, the touch sensing unit can perform touch sensing using self-capacitive sensing technology or mutual capacitive sensing technology, but is not limited to these.

[0028] The touch drive unit 210 supplies a touch drive signal to the second touch electrode XTE via the second touch routing line. The touch sensing unit 220 receives a touch sensing signal from the first touch electrode YTE via the first touch routing line, derives a change in the capacitance of the touch sensor, and based on this, can detect the presence or absence of a touch input and the coordinate information of the touched position.

[0029] The touch circuit 200 may be implemented as one or more components (e.g., an integrated circuit) and may be implemented separately from the display driver circuit 120. Alternatively, all or part of the touch circuit 200 may be implemented integrally with the display driver circuit 120 or its internal circuits. For example, part of the touch circuit 200 may be implemented as an integrated circuit together with the data driver circuit of the display driver circuit 120.

[0030] In one or more embodiments, the data drive circuit may be connected to the display panel 110 using tape autobonding (TAB) technology, to conductive pads such as bonding pads on the display panel 110 using chip-on-glass (COG) technology or chip-on-panel (COP) technology, or to the display panel 110 using chip-on-film (COF) technology.

[0031] The touch sensing display device 100 may include a compensation electrode CE located on the touchscreen panel TSP and a compensation circuit 300 for driving the compensation electrode CE in order to implement a crosstalk compensation function.

[0032] The compensation electrodes CE located on the touchscreen panel TSP include a first compensation electrode YCE surrounded by each of the first touch electrodes YTE, and a second compensation electrode XCE surrounded by each of the second touch electrodes XTE. The compensation electrodes CE are electrically isolated from the touch electrodes TE.

[0033] While the touch circuit 200 senses the touch input, the compensation circuit 300 supplies a compensation voltage CV to the first compensation electrode YCE and the second compensation electrode XCE to compensate for crosstalk caused by fluctuations in the data voltage supplied to the data line.

[0034] The first compensation electrode YCE and the second compensation electrode XCE may be divided into multiple compensation units CPT that are separated from each other along the second direction (x). The first compensation electrode YCE and the second compensation electrode XCE belonging to the same compensation unit may be electrically short-circuited (connected) to each other.

[0035] For example, the first compensation electrode YCE and the second compensation electrode XCE, which are included in the same compensation unit, may be electrically short-circuited and supplied with the same compensation voltage, but this is not limited to this.

[0036] Each of the multiple compensation units CPT may be connected to the compensation circuit 300 via a separate compensation routing line. The compensation circuit 300 may supply the same compensation voltage to the first compensation electrode YCE and the second compensation electrode XCE belonging to the same compensation unit via the compensation routing line.

[0037] For example, the compensation circuit 300 may be configured to supply a compensation voltage to a first compensation electrode YCE and a second compensation electrode XCE, which are included in the same compensation unit, to compensate for crosstalk caused by changes in each data voltage while a touch input is being detected.

[0038] The touch sensing display device 100 may include a microcontroller 150 (MCU) that controls the touch circuit 200 and the compensation circuit 300. The microcontroller 150 is supplied with a control synchronization signal Csync from the timing controller 140 (TCON). Based on the control synchronization signal Csync, the microcontroller 150 may generate a touch synchronization signal Tsync for controlling the touch circuit 200 and the compensation circuit 300.

[0039] The microcontroller 150 can transmit touch synchronization signals such as Tsync based on an interface defined between the touch circuit 200 and the compensation circuit 300. The microcontroller 150 may be formed in the form of a single integrated circuit together with the touch controller in the touch circuit 200, or it may be configured in the form of a single integrated circuit together with the timing controller 140, but is not limited to these. For example, the microcontroller 150 may be manufactured separately from the touch controller of the touch circuit 200, or separately from the timing controller 140.

[0040] The timing controller 140 (TCON) can control the display driver circuit 120 and the microcontroller 150. The timing controller 140 is supplied with timing signals such as a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, and a dot clock, as well as an input image data signal Vdata, from the host system.

[0041] The timing controller 140 can be connected to the display driver circuit 120 via an internal interface. The timing controller 140 transmits the input image data signal Vdata to the display driver circuit 120. The timing controller 140 controls the gate drive timing of the display driver circuit 120 based on scan timing control signals such as a gate start pulse, gate shift clock, and gate output enable signal. The timing controller 140 also controls the data drive timing of the display driver circuit 120 based on data timing control signals such as a source sampling clock and source output enable signal.

[0042] Figures 2A and 2B show that the touch electrode layer and the display electrode layer are coupled via the cathode electrode layer.

[0043] Referring to Figures 2A and 2B, the touchscreen panel TSP may be placed on the display panel 110 as an on-cell type or an add-on type. The display panel 110 may include an emissive emission array layer LOL and a TFT array layer LOT for realizing pixels. The TFT array layer LOT may include data lines DL.

[0044] The touch electrodes XTE and YTE that constitute the touch sensor are electrically coupled to the TFT array layer LOT via the light-emitting array layer LOL. The light-emitting array layer LOL includes the OLED cathode electrode CAT, which is connected to a low-potential pixel power supply. The cathode electrode CAT functions as a common electrode shared by all pixels.

[0045] The cathode electrode CAT acts as a medium for noise inflow. The cathode electrode CAT is coupled to the touch electrodes XTE and YTE via the first parasitic capacitance Cp1 and to the data line DL via the second parasitic capacitance Cp2. Therefore, display noise associated with fluctuations in data voltage may flow into the touch sensor via the first and second parasitic capacitances Cp1 and Cp2. The first and second parasitic capacitances Cp1 and Cp2 serve as noise inflow paths.

[0046] Figure 3 shows the display and touch crosstalk according to the displayed image pattern.

[0047] Referring to Figure 3, in the display device according to this disclosure, a touchscreen panel equipped with touch electrodes TE may be protected by a cover window CW. For example, the cover window CW can be placed on the touchscreen panel including the touch electrodes TE to protect the touchscreen panel. The cover window CW may be bonded to the touchscreen panel via an adhesive layer PSA to cover the touchscreen panel. When a measuring instrument ME is brought into contact with one conductive pattern on the cover window CW and noise is measured, it can be seen that the magnitude of the noise flowing into the touch sensor changes depending on the display image pattern.

[0048] Display noise occurring on data line DL is even greater in a white-black alternating pattern (Horizontal one by one, H1b1) compared to a white image pattern. This display noise affects the touch sensing signal via cathode coupling. Therefore, touch noise due to cathode coupling may also be even greater in a white-black alternating pattern compared to a white image pattern.

[0049] Figure 4 shows one embodiment of a compensation unit. Figure 5 shows that the first and second compensation electrodes constituting the compensation unit shown in Figure 4 are electrically connected. Figure 6 shows an example in which a compensation voltage is supplied independently to each of multiple compensation units.

[0050] Referring to Figures 4 to 6, the compensation unit CPT compensates for crosstalk caused by fluctuations in the data voltage supplied to the data line DL. Each compensation unit CPT is positioned to overlap with n (where n is a natural number greater than or equal to 2) data lines D1 to Dn, thereby compensating for the average fluctuation of the data voltage across the data lines D1 to Dn.

[0051] In a single compensation unit CPT overlapping data lines D1 to Dn, the first compensation electrode YCE lies coplanar with the first touch electrode YTE and may be surrounded by each of the first touch electrodes YTE. In a single compensation unit CPT, the second compensation electrode XCE lies coplanar with the second touch electrode XTE and may be surrounded by each of the second touch electrodes XTE.

[0052] In a single compensation unit CPT, the first compensation electrode YCE and the second compensation electrode XCE may be electrically connected to each other via a connecting electrode ECON.

[0053] In a single compensation unit CPT, the connecting electrode ECON may be located on a different plane from the first and second compensation electrodes YCE, XCE and connected to the first and second compensation electrodes YCE, XCE via contact holes penetrating the insulating film. Each connecting electrode ECON connects the first compensation electrode YCE and the second compensation electrode XCE, which are positioned adjacent to each other with the first and second touch electrodes YTE, XTE in between.

[0054] In a single compensation unit CPT, the first and second compensation electrodes YCE and XCE can be short-circuited to each other via a connecting electrode ECON. The compensation circuit supplies the same compensation voltage CV to the first and second compensation electrodes YCE and XCE belonging to a single compensation unit CPT. This compensation voltage CV compensates for the average fluctuation of the data voltage over superimposed data lines D1 to Dn.

[0055] As an example, the compensation circuit 300 may be configured to supply a compensation voltage CV to the first and second compensation electrodes YCE and XCE, which are included in the compensation unit CPT, to compensate for the average change in the data voltages of the overlapping data lines D1 to Dn while a touch input is detected, but is not limited to these configurations.

[0056] The compensation voltage CV can be an AC voltage that changes with the period of one horizontal period allocated to driving the pixels located in one pixel row. The compensation voltage and data voltage can change so that they are in opposite phases to each other. That is, the compensation voltage CV can be an AC voltage that changes so that it is in opposite phase to the average fluctuation of the data voltage for data lines D1 to Dn. One pixel row is a collection of pixels arranged along the second direction (x) and connected to the same gate line. One horizontal period is the time obtained by dividing one frame period by the vertical resolution.

[0057] Each compensation unit CPT may correspond to n data lines D1 to Dn. For example, the data lines may be divided into multiple groups corresponding to multiple compensation units CPT, and each of the multiple compensation units CPT may be arranged to overlap with n data lines D1 to Dn. For this purpose, the data lines may be grouped into n groups. The number of data line groups may be the same as the number of compensation units CPT.

[0058] The compensation units CPTs are configured to be electrically isolated from each other. Each compensation unit CPT may be supplied with an independent compensation voltage CV. The compensation voltages CV applied to each compensation unit CPT may be equal or different. Each compensation unit CPT may be supplied with a compensation voltage CV from the compensation circuit via a separate compensation routing line.

[0059] Each compensation unit CPT is separated from one another along a second direction (x) and may have a length along a first direction (y) and a width along a second direction (x). The width of each compensation unit CPT may be the same as the width of the touch sensor unit. The area of ​​the touch sensor unit may be realized as the sum of the area of ​​one of the first touch electrodes YTE and the area of ​​one of the second touch electrodes XTE.

[0060] Figure 7 shows another example of a single compensation unit. Figure 8 shows that the first and second compensation electrodes constituting the single compensation unit in Figure 7 are electrically connected.

[0061] Referring to Figure 7, each compensation unit CPT may, but is not limited to, correspond to 2n data lines D1 to D2n. For this purpose, data lines can be grouped into 2n units. For example, n data lines D1 to Dn may correspond to each compensation unit CPT. For this purpose, data lines can be grouped into units of n data lines. The number of data line groups may be the same as the number of compensation units CPT. For example, data lines may be divided into multiple groups corresponding to multiple compensation units.

[0062] Each compensation unit CPT is separated from one another along a second direction (x) and may have a length along a first direction (y) and a width along a second direction (x). The width of each compensation unit CPT may be twice the width of the touch sensor unit. The area of ​​the touch sensor unit may be realized as the sum of the area of ​​one first touch electrode YTE and the area of ​​one second touch electrode XTE.

[0063] Referring to Figure 8, within the same compensation unit CPT, each of the first compensation electrodes YCE may include a plurality of first sub-compensation electrodes S-YCE that are electrically connected to each other, and each of the second compensation electrodes XCE may include a plurality of second sub-compensation electrodes S-XCE that are electrically connected to each other.

[0064] Referring to Figure 8, in the same compensation unit CPT, each first compensation electrode YCE may include four first sub-compensation electrodes S-YCE that are electrically connected to each other, and each second compensation electrode XCE may include four second sub-compensation electrodes S-XCE that are electrically connected to each other, but is not limited to this.

[0065] Multiple first sub-compensation electrodes S-YCE may be surrounded by a first touch electrode YTE. For example, multiple first sub-compensation electrodes S-YCE included in each first compensation electrode YCE may be surrounded by a first touch electrode YTE. Multiple first sub-compensation electrodes S-YCE are spaced apart at regular intervals, and adjacent electrodes among the multiple first sub-compensation electrodes S-YCE are connected to each other via a connecting electrode ECON.

[0066] Multiple second sub-compensation electrodes S-XCE can be surrounded by a second touch electrode XTE. For example, multiple second sub-compensation electrodes S-XCE contained within each second compensation electrode XCE can be surrounded by a second touch electrode XTE. Multiple second sub-compensation electrodes S-XCE are spaced apart at regular intervals, and adjacent electrodes among the multiple second sub-compensation electrodes S-XCE are connected to each other via a connecting electrode ECON.

[0067] Furthermore, the first sub-compensation electrode S-YCE and the second sub-compensation electrode S-XCE, which are positioned adjacent to each other with the first and second touch electrodes YTE and XTE in between, are connected to each other via the connecting electrode ECON.

[0068] Within the compensation unit CPT, the effective area of ​​the compensation electrode shown in Figure 8 is even smaller than the effective area of ​​the compensation electrode shown in Figure 7. The configuration shown in Figure 8 has the advantage of making it easier to adjust the effective area of ​​the compensation electrode and to control the size of the parasitic capacitance connected to the compensation electrode, compared to the configuration shown in Figure 7.

[0069] Figure 9 shows an example in which the first touch electrode, the second touch electrode, and the first and second compensation electrodes are each composed of a conductive mesh pattern. Figure 10 shows a cross-section taken along the line A-A' shown in Figure 9. Figure 11 shows a cross-section taken along the line B-B' shown in Figure 9.

[0070] Referring to Figures 9, 10, and 11, the touch sensing display device according to this embodiment displays an image on the screen of the display panel via multiple pixels during the display period, and senses the change in mutual capacitance due to the user's touch input during the touch period to sense the presence or absence of touch input and the touch position. The touch sensing display device according to this embodiment supplies a compensation voltage to the first and second compensation electrodes YCE and XCE, which constitute the compensation unit, during the touch period to reduce noise caused by crosstalk between the display and the touch.

[0071] The display period and the touch period may partially overlap, or they may completely overlap.

[0072] Each pixel may include a light-emitting array layer LOL comprising a light-emitting element, a bank BNK, and a sealing film ENCP, and a TFT array layer LOT comprising at least one TFT insulating film OIL and data lines DL.

[0073] Bank BNK plays a role in defining subpixels. Therefore, bank BNK can be formed using an insulating material containing black material. Bank BNK can be formed using, for example, a transparent carbon-based mixture. Specifically, bank BNK may, but is not limited to, carbon black. Bank BNK can be formed using a transparent insulating material.

[0074] The light-emitting element includes an anode electrode AND patterned to be separated for each pixel, a light-emitting stack EL, and a cathode electrode CAT shared by all pixels. The cathode electrode CAT may be located on the data line and connected in common to the pixels.

[0075] The bank BNK defines the aperture region (or light-emitting region) of each pixel. The bank BNK surrounds the aperture region on all sides where the light-emitting stack EL is formed. The bank BNK may be formed of an opaque material (e.g., a black material) to prevent light interference between adjacent pixels. In this case, the bank BNK may include a light-shielding material consisting of at least one of a color pigment, organic black, and carbon.

[0076] The ENCP encapsulation film prevents external moisture and oxygen from penetrating the light-emitting element, which is vulnerable to moisture and oxygen. For this purpose, the ENCP encapsulation film may comprise at least one inorganic encapsulation layer and at least one organic encapsulation layer.

[0077] The inorganic encapsulation layer may include an inorganic insulating material. For example, the inorganic encapsulation layer may include an inorganic insulating material that can be deposited at low temperatures, such as silicon nitride (SiN), silicon oxide (SiO), silicon oxide nitride (SiON), or aluminum oxide (Al2O3).

[0078] The organic encapsulation layer may contain organic insulating materials such as acrylic resin, epoxy resin, polyimide, polyethylene, and silicon carbide (SiOC).

[0079] The touchscreen panel TSP is formed on the encapsulating film ENCP.

[0080] The touchscreen panel TSP includes a touch buffer layer (TBUF), an electrode array layer, and a touch protection layer (TPAS).

[0081] The touch buffer layer TBUF is bonded to the encapsulation film ENCP. The electrode array layer is located on the touch buffer layer TBUF. The electrode array layer includes first and second touch electrodes YTE and XTE, and first and second compensation electrodes YCE and XCE, located on the interlayer insulation layer TILD. The electrode array layer further includes a bridge electrode YBE, located below the interlayer insulation layer TILD. The bridge electrode YBE serves to electrically connect the adjacent first compensation electrode YCE.

[0082] The first touch electrode, the second touch electrodes YTE, XTE, and the first compensation electrode, the second compensation electrodes YCE, XCE, may, but are not limited to, a conductive mesh pattern. The conductive mesh pattern may be formed in a mesh shape using at least one conductive layer from Ti, Al, Mo, MoTi, Cu, Ta, and ITO, which have higher conductivity than the transparent conductive film.

[0083] The conductive mesh pattern may be formed in a stacked three-layer structure such as Ti / Al / Ti, MoTi / Cu / MoTi, or Ti / Al / Mo, but is not limited to these. For example, each of the first touch electrode, the second touch electrode YTE, XTE, and the first compensation electrode, the second compensation electrode YCE, XCE may be formed in a stacked three-layer structure such as Ti / Al / Ti, MoTi / Cu / MoTi, or Ti / Al / Mo, but is not limited to these. This reduces the resistance and capacitance of the first touch electrode, the second touch electrode YTE, XTE, and the first compensation electrode, the second compensation electrode YCE, XCE themselves, thereby improving touch sensitivity.

[0084] The conductive mesh pattern has a very small line width and is positioned in the electrode array layer so as to avoid the aperture region and overlap with the bank BNK, thus preventing a decrease in aperture ratio and transmittance due to the conductive mesh pattern.

[0085] Referring to Figure 10, a first compensating parasitic capacitance Cyc is formed between the first compensating electrode YCE and the cathode electrode CAT. The first compensating parasitic capacitance Cyc acts as a path to compensate for the voltage ripple of the cathode electrode CAT. Therefore, a larger first compensating parasitic capacitance Cyc is preferable. The first compensating parasitic capacitance Cyc may be 50% or more of the parasitic capacitance Cp2 between the data line DL overlapping the first touch electrode YTE region and the cathode electrode CAT, with reference to one of the touch sensors.

[0086] As an example, for one of the touch sensors, the first compensating parasitic capacitance Cyc between the first compensating electrode YCE and the cathode electrode CAT is 50% or more of the parasitic capacitance Cp2 between the cathode electrode CAT and the data line DL, which overlaps with the first touch electrode YTE region.

[0087] A first peripheral parasitic capacitance Cyp is formed between the first compensating electrode YCE and the first touch electrode YTE. Since the first peripheral parasitic capacitance Cyp is a coupling between the first compensating electrode YCE and the first touch electrode YTE, it is preferable for it to be small. The first peripheral parasitic capacitance Cyp between the first compensating electrode YCE and the first touch electrode YTE may be 30% or less of the parasitic capacitance Cp1 between the first touch electrode YTE and the cathode electrode CAT, but is not limited to this.

[0088] As shown in Figure 11, a second compensating parasitic capacitance Cxc is formed between the second compensating electrode XCE and the cathode electrode CAT. The second compensating parasitic capacitance Cxc acts as a path to compensate for the voltage ripple of the cathode electrode CAT. For this reason, a larger second compensating parasitic capacitance Cxc is preferable. The second compensating parasitic capacitance Cxc between the second compensating electrode XCE and the cathode electrode CAT may be 50% or more of the parasitic capacitance Cp2 between the data line DL overlapping the second touch electrode XTE region and the cathode electrode CAT, with reference to one of the touch sensors, but is not limited to this.

[0089] A second peripheral parasitic capacitance Cxp is formed between the second compensation electrode XCE and the second touch electrode XTE. Since the second peripheral parasitic capacitance Cxp is a coupling between the second compensation electrode XCE and the second touch electrode XTE, it is preferable for it to be small. The second peripheral parasitic capacitance Cxp between the second compensation electrode XCE and the second touch electrode XTE may be 30% or less of the parasitic capacitance Cp1 between the second touch electrode XTE and the cathode electrode CAT.

[0090] Figure 12 shows one embodiment in which a compensation electrode and a compensation pad are electrically connected via a compensation routing line.

[0091] Referring to Figure 12, a bezel region BZ is positioned on at least one side of the active region AA where the touch electrodes YTE, XTE and compensation electrodes YCE, XCE are located. The bezel region BZ may include a bending region that allows the substrate to be bent or folded. A crack-preventing layer may be further positioned in this bending region to facilitate its bending.

[0092] For example, the bending region may be curved, while the remaining portion of the substrate excluding the bending region may be flat. In this case, as the bending region bends, the bezel region BZ may be positioned behind the display region. However, embodiments of the present invention are not limited thereto.

[0093] The pads may be located in the bezel area BZ. The bezel area BZ contains a display pad D-Pad connected to the data line, a touch pad T-Pad connected to the touch routing line, and a compensation pad C-Pad connected to the compensation routing line CRL.

[0094] The compensating electrodes YCE and XCE are in contact with the compensating routing line CRL and may be connected to the compensating pad C-Pad via the CRL. The compensating pad C-Pad may output a compensating voltage that varies in units of one horizontal period to the compensating routing line CRL. The compensating pad C-Pad is connected to the output terminal of the compensating circuit.

[0095] Figures 13 and 14 show the configuration of the compensation circuit. Figure 15 shows the operation of the compensation circuit. Figure 16 shows an example in which the data voltage and the compensation voltage change in opposite phases to each other.

[0096] Referring to Figures 13 to 15, the compensation circuit 300 generates the compensation voltage CVH supplied to each of the compensation units. The configuration and operation of the compensation circuit 300 for generating the compensation voltage CVH supplied to one compensation unit are described below. In the following example, we assume that one compensation unit overlaps with n data lines D1 to Dn. However, embodiments of the present disclosure are not limited thereto.

[0097] The compensation circuit 300 may include a first line memory MEM1, a second line memory MEM2, a lookup table LUT, and a compensation voltage generation unit ACR to generate a compensation voltage CVH supplied to one compensation unit. For example, the first line memory MEM1 and the second line memory MEM2 may be connected to the compensation voltage generation unit ACR. The first line memory MEM1 may receive a data voltage DATA(H-1), and the second line memory MEM2 may receive a data voltage DATA(H).

[0098] The first line memory MEM1 stores the data voltage DATA(H-1) supplied to n data lines D1 to Dn during the H-1 horizontal period.

[0099] The second line memory MEM2 stores the data voltage DATA(H) supplied to n data lines D1 to Dn during the H horizontal period.

[0100] For example, within a given time, the direction of change of the compensation voltage supplied to one compensation unit may be opposite to the direction of the average change of the data voltage supplied to a group of n data lines D1 to Dn.

[0101] By referring to the first line memory MEM1 and the second line memory MEM2, the compensation voltage generation unit ACR derives the average value Δ of the inverse gradation of the n data voltages supplied to the n data lines D1 to Dn. For example, the compensation voltage generation unit ACR obtains n subtraction results showing inverse gradation by subtracting each of the n data voltages DATA(H) from the H horizontal period from each of the n data voltages DATA(H) from the H-1 horizontal period. Then, the compensation voltage generation unit ACR calculates the average value Δ of the n subtraction results. This can be expressed mathematically as shown in Equation 1 below. [Formula 1] JPEG2026098914000002.jpg977

[0102] The compensation voltage generation unit ACR refers to the lookup table LUT and derives a weight value α determined according to the average value Δ of the inverse gradation of n data voltages and the compensation voltage CVH-1 for the H-1 horizontal period.

[0103] The compensation voltage generation unit ACR generates the compensation voltage CVH for the H horizontal period by adding the result of multiplying the average value Δ of the inverse gradation of n data voltages by a weight value α, and adding the compensation voltage CVH-1 for the H-1 horizontal period. This can be expressed by the following equation 2. [Formula 2] JPEG2026098914000003.jpg953

[0104] As a result, as shown in Figure 16, the compensation voltage CVH for the H horizontal period changes in opposite phase to the average change in n data voltages AVdata. Consequently, coupling noise of the touch electrodes induced by data voltage fluctuations is reduced, and voltage ripple of the cathode electrode can be eliminated. This reduces crosstalk between the display and touch, improving touch performance and display image quality.

[0105] From the above explanation, those skilled in the art will understand that various changes and modifications are possible without departing from the technical concept of the present invention. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims. [Explanation of Symbols]

[0106] 110 Display Panel 120 Display driver circuit TSP Touchscreen Panel 200 touch circuits 300 compensation circuit

Claims

1. A touchscreen panel comprising: first touch electrodes located on the display panel and arranged along a first direction in which data lines extend; second touch electrodes arranged along a second direction intersecting the first direction; first compensation electrodes surrounded by each of the first touch electrodes; and second compensation electrodes surrounded by each of the second touch electrodes. A touch circuit that drives the first touch electrode and the second touch electrode to sense touch input to the touch sensor, While the touch input is being sensed, a compensation circuit supplies a compensation voltage corresponding to the data voltage applied to the data line of the display panel to the first compensation electrode and the second compensation electrode. A touch-sensing display device, including [a specific feature].

2. The display panel having multiple pixels, A display driver circuit that outputs the data voltage for driving the pixels to the data line of the display panel. It further includes, The compensation voltage is an AC voltage that changes periodically over a horizontal period allocated to driving a pixel located in one pixel row. The compensation voltage and the data voltage change so that they are in opposite phases. The touch sensing display device according to claim 1.

3. The touch sensing display device according to claim 1, wherein one horizontal period is the time obtained by dividing one frame period into vertical resolutions.

4. The first compensation electrode and the second compensation electrode are divided into a plurality of compensation units separated from each other along the second direction. The first and second compensation electrodes, belonging to the same compensation unit, are electrically short-circuited with each other and supplied with the same compensation voltage. The touch sensing display device according to claim 1.

5. The touch sensing display device according to claim 4, wherein the compensation unit is electrically isolated from another compensation unit, and the compensation unit is supplied with a compensation voltage independently.

6. The data line is divided into multiple groups corresponding to the multiple compensation units, One compensation unit belonging to the aforementioned plurality of compensation units overlaps with multiple data lines of one of the aforementioned groups, The touch sensing display device according to claim 4.

7. The touch sensing display device according to claim 6, wherein, within a predetermined time, the direction of change of the compensation voltage supplied to one compensation unit is opposite to the direction of average change of the multiple data voltages supplied to one group of multiple data lines.

8. The touch sensing display device according to claim 7, wherein the compensation circuit is configured to calculate the average value of the inverse gray levels of a plurality of data voltages supplied to a plurality of data lines in one group, and to generate the compensation voltage based on the average value of the inverse gray levels of the plurality of data voltages.

9. Within the same compensation unit, Each of the first compensation electrodes includes a plurality of first sub-compensation electrodes that are electrically connected to each other. The touch sensing display device according to claim 4, wherein each of the second compensating electrodes includes a plurality of second sub-compensating electrodes electrically connected to each other.

10. The plurality of first sub-compensation electrodes are surrounded by the first touch electrodes and are arranged at regular intervals apart from each other. The plurality of second sub-compensation electrodes are surrounded by the second touch electrodes and are arranged at regular intervals apart from each other. The touch sensing display device according to claim 9.

11. The touch sensing display device according to claim 9, wherein the first sub-compensation electrode and the second sub-compensation electrode, which are arranged adjacent to each other, are connected to each other via a connecting electrode.

12. The touch sensing display device according to claim 2, wherein each of the first touch electrode, the second touch electrode, the first compensation electrode, and the second compensation electrode is composed of a conductive mesh pattern.

13. The touch sensing display device according to claim 12, wherein the conductive mesh pattern is formed in a three-layer structure and is arranged in the electrode array layer of the touchscreen panel.

14. The display panel is provided with a bank pattern for defining the light-emitting area of ​​the pixels. The touch sensing display device according to claim 12, wherein the conductive mesh pattern overlaps with the bank pattern while avoiding the light-emitting region.

15. The display panel further includes cathode electrodes located on the data lines and commonly connected to the pixels, The parasitic capacitance between the first compensation electrode and the cathode electrode is 50% or more of the parasitic capacitance between the data line overlapping the first touch electrode region and the cathode electrode, with reference to either of the touch sensors. The parasitic capacitance between the first compensation electrode and the first touch electrode is 30% or less of the parasitic capacitance between the first touch electrode and the cathode electrode, with reference to either of the touch sensors. The touch sensing display device according to claim 2.

16. The display panel further includes cathode electrodes located on the data lines and commonly connected to the pixels, The parasitic capacitance between the second compensation electrode and the cathode electrode is 50% or more of the parasitic capacitance between the data line overlapping the second touch electrode region and the cathode electrode, with reference to either of the touch sensors. The parasitic capacitance between the second compensation electrode and the second touch electrode is 30% or less of the parasitic capacitance between the second touch electrode and the cathode electrode, with reference to any one of the touch sensors. The touch sensing display device according to claim 2.

17. The touch sensing display device according to claim 1, wherein the compensation voltage compensates for crosstalk caused by changes in each data voltage.

18. The touch sensing display device according to claim 1, wherein the first compensation electrode is arranged in the same plane as the first touch electrode, and the second compensation electrode is arranged in the same plane as the second touch electrode.

19. The steps include outputting data voltages for driving multiple pixels of the display panel to the data lines of the display panel, The steps include driving the first touch electrode and the second touch electrode to sense touch input to the touch sensor, While the touch input is being sensed, a compensation voltage corresponding to the data voltage is supplied to a first compensation electrode surrounded by each of the first touch electrodes and a second compensation electrode surrounded by each of the second touch electrodes on the touchscreen panel. A method for driving a touch-sensing display device, including the following.

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