Touch sensing device, display device, and method of driving touch sensing device

Abstract

A touch sensing device, a display device, and a method of driving the touch sensing device are disclosed. The touch sensing device includes a touch electrode, a sensing circuit unit configured to sense a capacitance change value of each of a plurality of touch nodes formed by the touch electrode, an analog-to-digital converter configured to output the capacitance change value of each of the plurality of touch nodes as touch sensing data as digital data, and a touch data compensator configured to analyze the touch sensing data to calculate a touch area ratio and configured to compensate the touch sensing data according to the touch area ratio.

Description

Technical Field

[0001] This disclosure relates to a touch sensing device, a display device including the touch sensing device, and a method for driving the touch sensing device. Background Technology

[0002] Recently, display devices for displaying images have been used for a variety of purposes. For example, display devices are used in various electronic devices such as smartphones, digital cameras, laptops, navigators, and smart TVs.

[0003] Such a display device may include a touch sensing unit as an input interface for sensing a user's touch. The touch sensing unit includes touch electrodes that are capacitively driven to sense the user's touch.

[0004] When a user touches a capacitive touchscreen over a large area, the charge on the touch electrodes may return to their original capacitance or to a capacitance below the touch threshold. Therefore, the sensing data from the capacitance of the touch electrodes where the touch occurred may be lower than the original expected value. Consequently, even if a touch occurs, there may be instances where the user's touch is not recognized. Summary of the Invention

[0005] According to embodiments of the present disclosure, a touch sensing device includes: a touch electrode; a sensing circuit unit configured to sense a capacitance change value of each of a plurality of touch nodes formed by the touch electrode; an analog-to-digital converter configured to output the capacitance change value of each of the plurality of touch nodes as touch sensing data as digital data; and a touch data compensator configured to analyze the touch sensing data to calculate a touch area ratio and configured to compensate the touch sensing data according to the touch area ratio.

[0006] According to another embodiment of this disclosure, a display device is provided, comprising: a display unit including a display area having pixels for displaying an image; a touch sensing unit overlapping the display area and including a touch sensing area having touch electrodes; and a touch driving circuit electrically connected to the touch electrodes. The touch driving circuit includes: a sensing circuit unit configured to sense a capacitance change value of each of a plurality of touch nodes formed by the touch electrodes; an analog-to-digital converter configured to output the capacitance change value of each of the plurality of touch nodes as touch sensing data as digital data; and a touch data compensator configured to analyze the touch sensing data to calculate a touch area ratio and configured to compensate the touch sensing data according to the touch area ratio.

[0007] According to another embodiment of this disclosure, a method is provided, comprising: sensing a capacitance change value of each of a plurality of touch nodes formed by touch electrodes, and converting the capacitance change value into touch sensing data that is digital data; determining the touch sensing data as valid touch data when the touch sensing data is equal to or greater than a threshold; calculating the number of valid touch data relative to the number of the plurality of touch nodes as a touch area ratio; and compensating the touch sensing data according to the touch area ratio. Attached Figure Description

[0008] The above and other features of the present invention will become more apparent from the detailed description of embodiments of the invention with reference to the accompanying drawings, in which:

[0009] Figure 1 This is a perspective view of a display device according to an embodiment;

[0010] Figure 2 This is a plan view of the display device according to an embodiment;

[0011] Figure 3 This is a side view of the display device according to an embodiment;

[0012] Figure 4 It is a schematic diagram. Figure 3 A layout diagram of an example of a touch sensing unit;

[0013] Figure 5 This is a detailed illustration. Figure 4 An enlarged plan view of an example of a touch node;

[0014] Figure 6 It is shown in the diagram along Figure 5 A cross-sectional view of an example display panel taken by line I-I';

[0015] Figure 7 This is a block diagram illustrating the touch sensing unit and touch driving circuit of a touch sensing device according to an embodiment;

[0016] Figure 8 This is a diagram illustrating the retransmission of charge in the capacitor of the touch electrode when a user makes a large-area touch.

[0017] Figure 9 This is a flowchart illustrating a method for driving a touch sensing device according to an embodiment;

[0018] Figure 10 This is a diagram illustrating touch sensing data calculated by the touch sensing circuit.

[0019] Figure 11 This is a graph illustrating valid touch data;

[0020] Figure 12It is a graph showing the effective touch data based on the representative value of the touch area ratio for each user;

[0021] Figure 13 This is a graph showing the correction rate of touch sensing data based on the touch area ratio;

[0022] Figure 14 This is a perspective view of a display device according to another embodiment;

[0023] Figure 15 This is a plan view of a display device according to another embodiment;

[0024] Figure 16 This is a cross-sectional view of a display device according to another embodiment;

[0025] Figure 17 It is a schematic diagram. Figure 16 A layout diagram of another example of a touch sensing unit;

[0026] Figure 18 This is a detailed illustration. Figure 17 An enlarged plan view of an example of a touch node; and

[0027] Figure 19 It is shown in the diagram along Figure 18 A cross-sectional view of an example display panel taken by line II-II'. Detailed Implementation

[0028] Embodiments of the inventive concept will be described more fully below with reference to the accompanying drawings. Throughout the specification and drawings, the same reference numerals may refer to the same elements.

[0029] It will be understood that when a component, such as a membrane, region, layer, or element, is referred to as being "on," "connected to," "coupled to," or "adjacent to" another component, it may be directly on, directly connected to, directly coupled to, or directly adjacent to the other component, or there may be intermediate components present. It will also be understood that when a component is referred to as being "between" two components, it may be the only component between the two components, or there may be one or more intermediate components present. It will also be understood that when a component is referred to as "covering" another component, it may be the only component covering the other component, or one or more intermediate components may also cover the other component. Other terms used to describe relationships between components can be interpreted in a similar manner.

[0030] It will be further understood that, unless the context clearly indicates otherwise, the description of a feature or aspect in each embodiment can be used for other similar features or aspects in other embodiments. Therefore, all features and structures described herein can be mixed and matched in any desired manner.

[0031] As used herein, the singular forms “a” and “the (said)” are intended to also include the plural forms, unless the context clearly indicates otherwise.

[0032] For ease of description, spatial relative terms such as “below,” “under,” “above,” and “upper” may be used herein to describe the relationship between one element or feature and another element(s) as shown in the accompanying drawings. It will be understood that, in addition to the orientations depicted in the drawings, the spatial relative terms are intended to also include different orientations of the device in use or operation. For example, if the device in the figures is flipped, the element described as “below” other elements or features will then be oriented “above” other elements or features. Therefore, the term “below” can include both above and below orientations.

[0033] When a feature is described as extending, protruding, or otherwise following a particular direction, it will be understood that the feature may follow said direction in a negative direction (i.e., the opposite direction). Therefore, unless the context explicitly indicates otherwise, the feature is not limited to precisely following a direction, but may follow an axis formed by that direction.

[0034] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] Figure 1 This is a perspective view of a display device according to an embodiment. Figure 2 This is a plan view of the display device according to an embodiment, and Figure 3 This is a side view of the display device according to an embodiment.

[0036] refer to Figures 1 to 3 The display device 10 according to the embodiments can be applied to portable electronic devices such as mobile phones, smartphones, tablet PCs (desktop PCs), mobile communication terminals, e-notebooks, e-readers, portable multimedia players (PMPs), navigators, or ultra-mobile PCs (UMPCs). The display device 10 according to the embodiments can also be applied to display units in televisions, laptops, monitors, billboards, or Internet of Things (IoT). The display device 10 according to the embodiments can also be applied to wearable devices such as smartwatches, smartwatch phones, glasses displays, or head-mounted displays (HMDs). The display device 10 according to the embodiments can also be applied to a central information display placed in a car dashboard, a car center console, or a car instrument panel; an interior mirror display replacing a car side mirror; or a display placed on the back surface of the front seat as an entertainment device for the rear seats of a car.

[0037] Display device 10 may be an organic light-emitting display device using organic light-emitting diodes, a quantum dot light-emitting display device including a quantum dot light-emitting layer, an inorganic light-emitting display device including inorganic semiconductors, or a light-emitting display device using micro or nano light-emitting diodes (micro LEDs or nano LEDs). In the following description, display device 10 will primarily be described as an organic light-emitting display device, but the inventive concept is not limited thereto.

[0038] The display device 10 includes a display panel 100, a display driving circuit 200, a display circuit board 300, and a touch driving circuit 400.

[0039] The display panel 100 may have a rectangular planar shape, having a shorter side in a first direction (X-axis direction) and a longer side in a second direction (Y-axis direction). The second direction (Y-axis direction) intersects the first direction (X-axis direction). The corner where the shorter side in the first direction (X-axis direction) intersects the longer side in the second direction (Y-axis direction) may be a circular shape with a predetermined curvature or a right angle shape. The planar shape of the display panel 100 is not limited to a rectangular shape and may be formed in other polygonal, circular, or elliptical shapes. The display panel 100 may be formed as a flat surface, but this disclosure is not limited thereto. For example, the display panel 100 may include curved surface portions formed at its left and right ends and having a constant or variable curvature. In addition, the display panel 100 may be flexible and can be bent, rolled, folded, or curled.

[0040] The display panel 100 may include a main area MA and a sub-area SBA.

[0041] The main region MA includes the display area DA for displaying the image and the non-display area NDA, which is the outer region of the display area DA. The display area DA includes pixels configured to display the image. The sub-region SBA may protrude from one side of the main region MA in a second direction (Y-axis direction).

[0042] although Figure 1 and Figure 2 The diagram illustrates the expanded state of a sub-region SBA, but the sub-region SBA can be as follows: Figure 3 The sub-region SBA shown is bent, and in this case, the sub-region SBA is arranged on the lower surface of the display panel 100. When the sub-region SBA is bent, the sub-region SBA can overlap with the main region MA in a third direction (Z-axis direction). The third direction refers to the thickness direction of the substrate SUB. The display driving circuit 200 can be arranged in the sub-region SBA.

[0043] like Figure 3As shown, the display panel 100 includes a substrate SUB, a display unit DU, and a touch sensing unit TDU. The display unit DU includes a thin-film transistor layer (TFTL), a light-emitting element layer (EML), and a packaging layer (TFEL).

[0044] A thin-film transistor layer (TFTL) can be disposed on a substrate (SUB). The TFTL can be disposed in a main region (MA) and a sub-region (SBA). The TFTL includes thin-film transistors.

[0045] The light-emitting element layer (EML) can be disposed on the thin-film transistor layer (TFTL). The EML can be disposed in the display area (DA) of the main area (MA). The EML includes light-emitting elements disposed in the light-emitting units.

[0046] The encapsulation layer TFEL can be disposed on the light-emitting element layer EML. The encapsulation layer TFEL can be disposed in the display area DA and the non-display area NDA of the main area MA. The encapsulation layer TFEL may include at least one inorganic layer and at least one organic layer for encapsulating the light-emitting element layer EML.

[0047] The touch sensing unit (TDU) can be disposed on the encapsulation layer (TFEL). The touch sensing unit (TDU) can be disposed within the display area (DA) and non-display area (NDA) of the main area (MA). The touch sensing unit (TDU) can use touch electrodes to sense touch from a person or object.

[0048] A cover window for protecting the upper portion of the display panel 100 can be disposed on the touch sensing unit TDU. The cover window can be attached to the touch sensing unit TDU using a transparent adhesive member such as an optically clear adhesive (OCA) film or an optically clear resin (OCR). The cover window can be an inorganic material such as glass or an organic material such as plastic or polymer. A polarizing film can be disposed between the touch sensing unit TDU and the cover window to prevent reduced image visibility due to reflection of external light.

[0049] The display driving circuit 200 can generate signals and voltages for driving the display panel 100. The display driving circuit 200 can be formed as an integrated circuit (IC) and attached to the display panel 100 by a chip-on-glass (COG) method, a chip-on-plastic (COP) method, or an ultrasonic bonding method, but this disclosure is not limited to these methods. For example, the display driving circuit 200 can be attached to the display circuit board 300 by a chip-on-film (COF) method.

[0050] The display circuit board 300 can be attached to one end of a sub-region SBA of the display panel 100. Therefore, the display circuit board 300 can be electrically connected to the display panel 100 and the display driving circuit 200. The display panel 100 and the display driving circuit 200 can receive digital video data, timing signals, and driving voltages through the display circuit board 300. The display circuit board 300 can be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip-on-film, but this disclosure is not limited thereto.

[0051] The touch driving circuit 400 can be arranged on the display circuit board 300. The touch driving circuit 400 can be formed as an integrated circuit (IC) and attached to the display circuit board 300.

[0052] The touch driving circuit 400 can be electrically connected to the touch electrodes of the touch sensing unit TDU. The touch driving circuit 400 applies a driving signal to the touch electrodes of the touch sensing unit TDU and measures the capacitance change of the mutual capacitance of each of the plurality of touch nodes formed by the touch electrodes. The touch driving circuit 400 can determine a user's touch or user proximity based on the capacitance change of the mutual capacitance of each of the plurality of touch nodes. A user's touch indicates that the user's finger or an object such as a pen directly contacts a surface of a cover window arranged on the touch sensing unit TDU. A user's proximity can refer to when the user's finger or an object such as a pen is located above but separated from a surface of the cover window.

[0053] To reduce the reflection of external light by the metal lines and metal electrodes of the display panel 100, the display panel 100 may include a color filter layer, which includes a color filter. Therefore, since it is not necessary to attach a separate anti-reflective component such as a polarizer to the display panel 100, the manufacturing cost of the display device 10 can be reduced.

[0054] Figure 4 It is a schematic diagram. Figure 3 A layout diagram of an example of a touch sensing unit.

[0055] Despite Figure 4 The figure shows that the touch electrode SE of the touch sensing unit TDU can include two types of electrodes (e.g., driving electrode TE and sensing electrode RE), and the touch sensing unit TDU can be driven by a mutual capacitance method (whereby the capacitance change of the mutual capacitance of each of a plurality of touch nodes is sensed by the sensing electrode RE after a touch driving signal is applied to the driving electrode TE), but the present invention is not necessarily limited thereto.

[0056] exist Figure 4For ease of description, only the driving electrode TE, sensing electrode RE, dummy pattern DE, touch lines TL1, TL2 and RL, and touch pads TP1 and TP2 are shown.

[0057] refer to Figure 4 The touch sensing unit (TDU) includes a touch sensing area (TSA) for sensing user touches and a touch peripheral area (TPA) arranged around the touch sensing area (TSA). The touch sensing area (TSA) can be connected to... Figures 1 to 3 The display area DA overlaps, and the touch peripheral area TPA can be touched. Figures 1 to 3 Non-display area NDA overlap.

[0058] The touch sensing area TSA includes a driving electrode TE, a sensing electrode RE, and a dummy pattern DE. The driving electrode TE and the sensing electrode RE can be electrodes used to form mutual capacitance in order to sense the touch of an object or person.

[0059] The sensing electrodes RE can be arranged side-by-side in a first direction (X-axis direction) and a second direction (Y-axis direction). The sensing electrodes RE can be electrically connected to each other in the first direction (X-axis direction). Adjacent sensing electrodes RE in the first direction (X-axis direction) can be connected to each other. Adjacent sensing electrodes RE in the second direction (Y-axis direction) can be electrically disconnected from each other. Therefore, a touch node TN with mutual capacitance can be arranged at the intersection of the driving electrode TE and the sensing electrode RE.

[0060] The driving electrodes TE can be arranged side-by-side in a first direction (X-axis direction) and a second direction (Y-axis direction). Adjacent driving electrodes TE in the first direction (X-axis direction) can be electrically separated from each other. The driving electrodes TE can be electrically connected to each other in the second direction (Y-axis direction). For example, adjacent driving electrodes TE in the second direction (Y-axis direction) can be connected to each other via a connecting electrode BE1, such as... Figure 5 As shown in the image.

[0061] Each of the dummy patterns DE can be surrounded by a driving electrode TE or a sensing electrode RE. Each of the dummy patterns DE can be electrically isolated from the driving electrode TE or the sensing electrode RE. Each of the dummy patterns DE can be spaced apart from the driving electrode TE or the sensing electrode RE. Each of the dummy patterns DE can be electrically floated.

[0062] Despite Figure 4 The diagram illustrates that each of the driving electrode TE, sensing electrode RE, and dummy pattern DE has a rhomboid planar shape, but their shapes are not limited to this. For example, each of the driving electrode TE, sensing electrode RE, and dummy pattern DE may have a rectangular, polygonal (other than rhomboid and rectangular), circular, or elliptical planar shape.

[0063] Touch lines TL1, TL2, and RL can be disposed in the touch periphery area TPA. Touch lines TL1, TL2, and RL include a touch sensing line RL connected to the sensing electrode RE, and a first touch driving line TL1 and a second touch driving line TL2 connected to the driving electrode TE.

[0064] The sensing electrode RE, located on one side of the touch sensing area TSA, can be connected to the touch sensing line RL in a one-to-one manner. For example, as... Figure 4 As shown, among the sensing electrodes RE electrically connected in the first direction (X-axis direction), the sensing electrode RE at the right end can be connected to the touch sensing line RL. The touch sensing line RL can be connected to the second touch pad TP2 in a one-to-one manner. The touch pad (and specifically, the second touch pad TP2) can be connected to the touch driving circuit 400. Therefore, the touch driving circuit 400 can be electrically connected to the sensing electrode RE.

[0065] The driving electrode TE, located on one side of the touch sensing area TSA, can be connected to the first touch driving line TL1 in a one-to-one manner, and the driving electrode TE, located on the other side of the touch sensing area TSA, can be connected to the second touch driving line TL2 in a one-to-one manner. For example, as... Figure 4 As shown, among the driving electrodes TE electrically connected in the second direction (Y-axis direction), the driving electrode TE located at the lower end can be connected to the first touch driving line TL1, and the driving electrode TE located at the upper end can be connected to the second touch driving line TL2. The second touch driving line TL2 can be connected to the driving electrode TE on the upper side of the touch sensing area TSA via the outer left side of the touch sensing area TSA.

[0066] The first touch drive line TL1 and the second touch drive line TL2 can be connected to the first touch pad TP1 in a one-to-one manner. The first touch pad TP1 can be connected to the touch drive circuit 400. Therefore, the touch drive circuit 400 can be electrically connected to the drive electrode TE. Since the drive electrode TE is connected to the touch drive lines TL1 and TL2 on both sides of the touch sensing area TSA to receive touch drive signals, it is possible to prevent the difference between the touch drive signal applied to the drive electrode TE located on the lower side of the touch sensing area TSA and the touch drive signal applied to the drive electrode TE located on the upper side of the touch sensing area TSA due to the RC delay of the touch drive signal.

[0067] The first touch pad TP1 is disposed in the first touch pad area TPA1, which can be disposed on one side of the display pad area DPA, in which the display pad DP is disposed. The second touch pad TP2 is disposed in the second touch pad area TPA2, which can be disposed on the other side of the display pad area DPA. The display pad DP can be electrically connected to the data cable of the display panel 100.

[0068] The display pad area DPA, the first touch pad area TPA1, and the second touch pad area TPA2 can be connected to the display panel 100. Figure 2 The pads of the display circuit board 300 shown correspond to each other. The display circuit board 300 can be arranged on the display pad DP, the first touch pad TP1, and the second touch pad TP2. The display pad DP, the first touch pad TP1, and the second touch pad TP2 can be electrically connected to the display circuit board 300 using low-resistance and high-reliability materials such as anisotropic conductive film or SAP. Therefore, the display pad DP, the first touch pad TP1, and the second touch pad TP2 can be electrically connected to the touch driving circuit 400 arranged on the display circuit board 300.

[0069] Figure 5 It is a diagram. Figure 4 An enlarged plan view of an example of a touch node.

[0070] refer to Figure 5 The touch node TN can be defined as the intersection of the driving electrode TE and the sensing electrode RE.

[0071] Since the driving electrode TE and the sensing electrode RE are arranged on the same layer, they can be spaced apart from each other. That is, gaps can be formed between adjacent driving electrodes TE and sensing electrodes RE.

[0072] The dummy pattern DE can also be arranged on the same layer as the driving electrode TE and the sensing electrode RE. That is, gaps can be formed between adjacent driving electrodes TE and dummy patterns DE, and between adjacent sensing electrodes RE and dummy patterns DE.

[0073] The connecting electrode BE1 can be arranged on a different layer from the driving electrode TE and the sensing electrode RE. The connecting electrode BE1 can be bent at least once. Although in Figure 5 The diagram illustrates that the connecting electrode BE1 has a bracket shape ("<" or ">"), but the planar shape of the connecting electrode BE1 is not limited to this. Since the drive electrodes TE, which are adjacent to each other in the second direction (Y-axis direction), are connected through multiple connecting electrodes BE1, even if any one of the connecting electrodes BE1 is disconnected, the drive electrodes TE, which are adjacent to each other in the second direction (Y-axis direction), can still be stably connected. Although in Figure 5The diagram shows that adjacent drive electrodes TE are connected by two connecting electrodes BE1, but the number of connecting electrodes BE1 is not limited to this.

[0074] The connecting electrode BE1 can overlap with the adjacent driving electrode TE in the second direction (Y-axis direction) in a third direction (Z-axis direction) of the thickness direction of the substrate SUB. The connecting electrode BE1 can also overlap with the sensing electrode RE in the third direction (Z-axis direction). One side of the connecting electrode BE1 can be connected to any one of the adjacent driving electrodes TE in the second direction (Y-axis direction) via the touch contact hole TCNT1. The other side of the connecting electrode BE1 can be connected to another adjacent driving electrode TE in the second direction (Y-axis direction) via the touch contact hole TCNT1.

[0075] The driving electrode TE and the sensing electrode RE can be electrically separated at their intersection. Therefore, mutual capacitance can be formed between the driving electrode TE and the sensing electrode RE.

[0076] Each of the driving electrode TE, sensing electrode RE, and connecting electrode BE1 can have a planar shape with a grid or mesh structure. Each of the dummy patterns DE can also have a planar shape with a grid or mesh structure. Therefore, the driving electrode TE, sensing electrode RE, connecting electrode BE1, and dummy pattern DE can not overlap with the light-emitting units EA1, EA2, EA3, and EA4 of each pixel PX. Thus, the light emitted from the light-emitting units EA1, EA2, EA3, and EA4 is not covered by the driving electrode TE, sensing electrode RE, connecting electrode BE1, and dummy pattern DE, thereby preventing a reduction in light brightness.

[0077] Each pixel PX includes a first light-emitting unit EA1 that emits light of a first color, a second light-emitting unit EA2 that emits light of a second color, a third light-emitting unit EA3 that emits light of a third color, and a fourth light-emitting unit EA4 that emits light of the second color. For example, the first color can be red, the second color can be green, and the third color can be blue.

[0078] In each pixel PX, the first light-emitting unit EA1 and the second light-emitting unit EA2 can be adjacent to each other in the fourth direction DR4, and the third light-emitting unit EA3 and the fourth light-emitting unit EA4 can be adjacent to each other in the fourth direction DR4. Furthermore, in each pixel PX, the first light-emitting unit EA1 and the fourth light-emitting unit EA4 can be adjacent to each other in the fifth direction DR5, and the second light-emitting unit EA2 and the third light-emitting unit EA3 can be adjacent to each other in the fifth direction DR5.

[0079] Each of the first light-emitting unit EA1, the second light-emitting unit EA2, the third light-emitting unit EA3, and the fourth light-emitting unit EA4 can have a rhomboid planar shape or a rectangular planar shape, but its shape is not limited to these. Each of the first light-emitting unit EA1, the second light-emitting unit EA2, the third light-emitting unit EA3, and the fourth light-emitting unit EA4 can have a polygonal, circular, or elliptical planar shape other than rhombus and rectangle. Although in Figure 5 The diagram shows that the third light-emitting unit EA3 has the largest area, and each of the second light-emitting unit EA2 and the fourth light-emitting unit EA4 has the smallest area, but the present invention is not limited thereto.

[0080] The second light-emitting unit EA2 and the fourth light-emitting unit EA4 can be arranged in odd-numbered rows. In each of the odd-numbered rows, the second light-emitting unit EA2 and the fourth light-emitting unit EA4 can be arranged side by side with each other in the first direction (X-axis direction). The second light-emitting unit EA2 and the fourth light-emitting unit EA4 can be arranged alternately in each of the odd-numbered rows. Each of the second light-emitting units EA2 can have a long side in the fourth direction DR4 and a short side in the fifth direction DR5, while each of the fourth light-emitting units EA4 can have a short side in the fourth direction DR4 and a long side in the fifth direction DR5. The fourth direction DR4, which is the direction between the first direction (X-axis direction) and the second direction (Y-axis direction), can be a direction tilted at 45° relative to the first direction (X-axis direction). The fifth direction DR5 can be a direction orthogonal to the fourth direction DR4.

[0081] The first light-emitting unit EA1 and the third light-emitting unit EA3 can be arranged in even-numbered rows. In each of the even-numbered rows, the first light-emitting unit EA1 and the third light-emitting unit EA3 can be arranged side by side with each other in the first direction (X-axis direction). The first light-emitting unit EA1 and the third light-emitting unit EA3 can be arranged alternately in each of the even-numbered rows.

[0082] The second light-emitting unit EA2 and the fourth light-emitting unit EA4 can be arranged in odd-numbered columns. In each of the odd-numbered columns, the second light-emitting unit EA2 and the fourth light-emitting unit EA4 can be arranged side by side with each other in the second direction (Y-axis direction). The second light-emitting unit EA2 and the fourth light-emitting unit EA4 can be arranged alternately in each of the odd-numbered columns.

[0083] The first light-emitting unit EA1 and the third light-emitting unit EA3 can be arranged in even-numbered columns. In each even-numbered column, the first light-emitting unit EA1 and the third light-emitting unit EA3 can be arranged side by side with each other in the second direction (Y-axis direction). The first light-emitting unit EA1 and the third light-emitting unit EA3 can be arranged alternately in each even-numbered column.

[0084] Figure 6 It is shown in the diagram along Figure 5 A cross-sectional view of an example display panel taken by line I-I'.

[0085] refer to Figure 6 The barrier layer BR can be disposed on the substrate SUB. The substrate SUB can be made of an insulating material such as a polymer resin. For example, the substrate SUB can be made of polyimide. The substrate SUB can be a flexible substrate that can be bent, folded, or rolled.

[0086] The barrier layer BR is a layer used to protect the thin-film transistor layer TFTL and the light-emitting layer 172 of the light-emitting element layer EML from the influence of moisture penetrating through the moisture-permeable substrate SUB. The barrier layer BR may comprise multiple inorganic layers stacked alternately. For example, the barrier layer BR may be formed as a multilayer in which one or more inorganic layers selected from silicon nitride, silicon oxynitride, silicon oxide, titanium oxide, and aluminum oxide are stacked alternately.

[0087] Thin-film transistor ST1 can be disposed on barrier layer BR. Thin-film transistor ST1 includes active layer ACT1, gate electrode G1, source electrode S1, and drain electrode D1.

[0088] The active layer ACT1, source electrode S1, and drain electrode D1 of the thin-film transistor ST1 can be disposed on the barrier layer BR. The active layer ACT1 of the thin-film transistor ST1 can include polycrystalline silicon, monocrystalline silicon, low-temperature polycrystalline silicon, amorphous silicon, or oxide semiconductor. The active layer ACT1 that overlaps with the gate electrode G1 in the third direction (Z-axis direction) of the thickness direction of the substrate SUB can be defined as the channel region. The source electrode S1 and drain electrode D1 are regions that do not overlap with the gate electrode G1 in the third direction (Z-axis direction) and can include silicon semiconductor or oxide semiconductor doped with ions or impurities.

[0089] The gate insulating layer 130 can be disposed on the active layer ACT1, source electrode S1, and drain electrode D1 of the thin-film transistor ST1. The gate insulating layer 130 may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0090] The gate electrode G1 of the thin-film transistor ST1 can be disposed on the gate insulating layer 130. The gate electrode G1 can overlap with the active layer ACT1 in the third direction (Z-axis direction). The gate electrode G1 can comprise a single layer or multiple layers of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof.

[0091] The first interlayer insulating layer 141 can be disposed on the gate electrode G1 of the thin-film transistor ST1. The first interlayer insulating layer 141 may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The first interlayer insulating layer 141 may include multiple inorganic layers.

[0092] The capacitor electrode CAE can be disposed on the first interlayer insulating layer 141. The capacitor electrode CAE can overlap with the gate electrode G1 of the thin-film transistor ST1 in the third direction (Z-axis direction). Since the first interlayer insulating layer 141 has a predetermined dielectric constant, the capacitor can be formed by the capacitor electrode CAE, the gate electrode G1, and the first interlayer insulating layer 141 disposed between them. The capacitor electrode CAE can be formed as a single layer or multiple layers containing any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof.

[0093] The second interlayer insulating layer 142 can be disposed on the capacitor electrode CAE. The second interlayer insulating layer 142 may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The second interlayer insulating layer 142 may include multiple inorganic layers.

[0094] The first anode connection electrode ANDE1 can be disposed on the second interlayer insulating layer 142. The first anode connection electrode ANDE1 can be connected to the drain electrode D1 of the thin-film transistor ST1 through a first connection contact hole ANCT1 penetrating the gate insulating layer 130, the first interlayer insulating layer 141, and the second interlayer insulating layer 142. The first anode connection electrode ANDE1 can be formed as a single layer or multiple layers comprising any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof.

[0095] A first planarization layer 160 for flattening the step caused by the thin-film transistor ST1 may be disposed on the first anode connection electrode ANDE1. The first planarization layer 160 may include an organic layer comprising acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0096] The second anode connection electrode ANDE2 can be disposed on the first planarization layer 160. The second anode connection electrode ANDE2 can be connected to the first anode connection electrode ANDE1 through the second connection contact hole ANCT2 penetrating the first planarization layer 160. The second anode connection electrode ANDE2 can be formed as a single layer or multiple layers containing any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu) or alloys thereof.

[0097] The second planarization layer 180 can be disposed on the second anode connection electrode ANDE2. The second planarization layer 180 may include an organic layer comprising acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0098] The light-emitting element (LEL) and the embankment 190 can be arranged on the second planarization layer 180. Each of the light-emitting elements (LEL) includes a pixel electrode 171, a light-emitting layer 172, and a common electrode 173.

[0099] Pixel electrode 171 can be disposed on the second planarization layer 180. Pixel electrode 171 can be connected to the second anode connection electrode ANDE2 through a third connection contact hole ANCT3 penetrating the second planarization layer 180.

[0100] In a top-emission structure where light is emitted from the light-emitting layer 172 toward the common electrode 173, the pixel electrode 171 may include a highly reflective metallic material, such as a laminated structure of aluminum and titanium (Ti / Al / Ti), a laminated structure of aluminum and indium tin oxide (ITO) (ITO / Al / ITO), an APC alloy, or a laminated structure of an APC alloy and ITO (ITO / APC / ITO). The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

[0101] To define the first light-emitting unit EA1, the second light-emitting unit EA2, the third light-emitting unit EA3, and the fourth light-emitting unit EA4, the dam 190 can be formed to divide the pixel electrode 171 on the second planarization layer 180. The dam 190 can be arranged to cover the edge of the pixel electrode 171. The dam 190 may include an organic film comprising acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0102] Each of the first light-emitting unit EA1, the second light-emitting unit EA2, the third light-emitting unit EA3, and the fourth light-emitting unit EA4 indicates a region in which the pixel electrode 171, the light-emitting layer 172, and the common electrode 173 are stacked sequentially. Therefore, holes from the pixel electrode 171 and electrons from the common electrode 173 combine with each other in the light-emitting layer 172 to emit light.

[0103] The light-emitting layer 172 can be disposed on the pixel electrode 171 and the embankment 190. The light-emitting layer 172 may include an organic material and emit light of a predetermined color. For example, the light-emitting layer 172 may include a hole transport layer, an organic material layer, and an electron transport layer.

[0104] A common electrode 173 can be disposed on the light-emitting layer 172. The common electrode 173 can cover the light-emitting layer 172. The common electrode 173 can be a common layer formed in the first light-emitting unit EA1, the second light-emitting unit EA2, the third light-emitting unit EA3, and the fourth light-emitting unit EA4. A capping layer can be formed on the common electrode 173.

[0105] In the top-emitting structure, the common electrode 173 may comprise a transparent conductive material (TCO) such as ITO or IZO that transmits light, or a semi-transmissive conductive material such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). When the common electrode 173 is formed of a semi-transmissive conductive material, the luminous efficiency can be improved due to the microcavity.

[0106] The encapsulation layer TFEL can be disposed on the common electrode 173. The encapsulation layer TFEL includes at least one inorganic layer to prevent oxygen or moisture from penetrating into the light-emitting element layer EML. In addition, the encapsulation layer TFEL includes at least one organic layer to protect the light-emitting element layer EML from foreign matter such as dust. For example, the encapsulation layer TFEL includes a first inorganic encapsulation layer TFE1, an organic encapsulation layer TFE2, and a second inorganic encapsulation layer TFE3.

[0107] A first inorganic encapsulation layer TFE1 can be disposed on the common electrode 173, an organic encapsulation layer TFE2 can be disposed on the first inorganic encapsulation layer TFE1, and a second inorganic encapsulation layer TFE3 can be disposed on the organic encapsulation layer TFE2. Each of the first inorganic encapsulation layer TFE1 and the second inorganic encapsulation layer TFE3 can be formed as a multilayer in which one or more inorganic layers selected from silicon nitride, silicon oxynitride, silicon oxide, titanium oxide, and aluminum oxide are alternately stacked. The organic encapsulation layer TFE2 can be an organic layer including acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0108] The touch sensing unit (TDU) can be disposed on the encapsulation layer (TFEL). The touch sensing unit (TDU) includes a first touch insulating layer (TINS1), a connection electrode (BE1), a second touch insulating layer (TINS2), a driving electrode (TE), a sensing electrode (RE), and a third touch insulating layer (TINS3).

[0109] The first touch insulating layer TINS1 may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0110] The connecting electrode BE1 can be disposed on the first touch insulating layer TINS1. The connecting electrode BE1 can be formed as a single layer or multiple layers containing any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu) or alloys thereof.

[0111] A second touch insulating layer TINS2 is disposed on the connecting electrode BE1. The second touch insulating layer TINS2 may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. Alternatively, the second touch insulating layer TINS2 may be an organic layer comprising an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0112] The driving electrode TE and the sensing electrode RE can be arranged on the second touch insulating layer TINS2. In addition to the driving electrode TE and the sensing electrode RE, Figure 4 The dummy pattern DE, the first touch driving line TL1, the second touch driving line TL2, and the touch sensing line RL shown can be arranged on the second touch insulating layer TINS2. The driving electrode TE and the sensing electrode RE can be formed as a single layer or multiple layers containing any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof.

[0113] The driving electrode TE and the sensing electrode RE can overlap with the connecting electrode BE1 in the third direction (Z-axis direction). The driving electrode TE can be connected to the connecting electrode BE1 through the touch contact hole TCNT1 that penetrates the second touch insulating layer TINS2.

[0114] A third touch insulating layer, TINS3, is formed on the driving electrode TE and the sensing electrode RE. The third touch insulating layer TINS3 can be used to flatten any uneven surface formed by the driving electrode TE, the sensing electrode RE, and the connecting electrode BE1. The third touch insulating layer TINS3 can be an organic layer including acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0115] Figure 7 This is a block diagram illustrating the touch sensing unit and touch driving circuit of a touch sensing device according to an embodiment.

[0116] refer to Figure 7 The touch sensing device can be a device for recognizing a user's touch. The touch sensing device may include a touch sensing unit (TDU) and a touch driving circuit (400).

[0117] Since it has already been referenced Figure 4The Touch Sensing Unit (TDU) has been described in detail, therefore its description will be omitted.

[0118] The touch driving circuit 400 includes a driving signal output unit 410, a sensing circuit unit 420, an analog-to-digital converter 430, a touch controller 440, and a touch data compensator 450.

[0119] The drive signal output unit 410 outputs the touch drive signal to the drive electrode TE through the first touch drive line TL1. Figure 7 Although the second touch drive line TL2 is omitted for ease of description, the drive signal output unit 410 outputs the touch drive signal to the drive electrode TE through the second touch drive line TL2. The touch drive signal may include multiple pulses.

[0120] The drive signal output unit 410 can output touch drive signals to the first touch drive line TL1 and the second touch drive line TL2 in a predetermined order. For example, the drive signal output unit 410 can sequentially output touch drive signals from the drive electrode TE arranged in the first column C1 on the far left of the touch sensing area TSA to the drive electrode TE arranged in the fifth column C5 on the far right of the touch sensing area TSA. Other examples may include more columns and rows accommodating the drive electrode TE and the sensing electrode RE.

[0121] The sensing circuit unit 420 can be connected to the sensing electrode RE via the touch sensing line RL. The sensing circuit unit 420 can sense the capacitance change of the mutual capacitance of the touch node TN corresponding to the intersection of the driving electrode TE and the sensing electrode RE via the touch sensing line RL.

[0122] The sensing circuit unit 420 may include an operational amplifier AFE for sensing capacitance changes in the mutual capacitance of the touch node TN. The operational amplifier AFE may be connected to the touch sensing line RL in a one-to-one manner.

[0123] The analog-to-digital converter 430 converts each of the output voltages of the operational amplifier AFE of the sensing circuit unit 420 into touch sensing data TD as digital data.

[0124] The touch controller 440 controls the driving timing of the drive signal output unit 410, the sensing circuit unit 420, and the analog-to-digital converter 430. The touch controller 440 can output timing signals for synchronizing the drive signal output unit 410, the sensing circuit unit 420, and the analog-to-digital converter 430 to the drive signal output unit 410, the sensing circuit unit 420, and the analog-to-digital converter 430, respectively.

[0125] Touch data compensator 450 receives touch sensing data TD sensed from touch node TN of touch sensing area TSA from analog-to-digital converter 430. Touch data compensator 450 analyzes touch sensing data TD to calculate touch area ratio and compensates touch sensing data TD according to touch area ratio.

[0126] Figure 8 This diagram illustrates the retransmission of charge in the capacitor of the touch electrode when a user makes a large-area touch.

[0127] refer to Figure 8 Mutual capacitance Cm is formed in each of the touch nodes TN corresponding to the intersection of the driving electrode TE and the sensing electrode RE. Compared with the mutual capacitance Cm formed in each touch node TN of the touch sensing unit TDU, the finger F corresponds to a low ground mass body. Therefore, when the user's finger F touches, the ground capacitor CLGM can be formed between each driving electrode TE arranged in the area where the touch occurs and the finger F, and additionally or alternatively, formed between each sensing electrode RE arranged in the area where the touch occurs and the finger F.

[0128] Typically, the charge from the mutual capacitance Cm located in the area where the finger F touches is discharged to the finger F. Therefore, the capacitance change of the mutual capacitance Cm in the area where the finger F touches can be much larger than the capacitance change of the mutual capacitance Cm in the area where no touch occurs. Thus, touch from the user can be sensed.

[0129] However, when the user's finger F makes a large-area touch, such as Figure 8 As shown, a retransmission may occur (as indicated by the dashed arrow), where the charge discharged from mutual capacitance Cm to finger F is transferred to another mutual capacitance Cm. In this case, although the other mutual capacitance Cm is arranged in the area where finger F touches, the difference between the capacitance change of the mutual capacitance Cm arranged in the area where touch occurs and the capacitance change of the mutual capacitance Cm arranged in the area where no touch occurs may be small. In this case, the touch sensing data sensed from the other mutual capacitance Cm may be less than the original expected value, and therefore the touch node TN forming the other mutual capacitance Cm may not be identified as the area where touch occurs.

[0130] like Figure 7As shown, the touch data compensator 450 analyzes the touch sensing data TD to calculate the touch area ratio and compensates the touch sensing data TD based on the touch area ratio. For example, when the touch area ratio is high, the touch data compensator 450 determines that a retransmission has occurred due to a large-area touch and compensates the touch sensing data TD. Therefore, it is possible to prevent touch nodes TN arranged in areas where large-area touches occur from being identified as areas where no touch has occurred. Thus, it is possible to reliably identify large-area touches caused by the user.

[0131] Figure 9 This is a flowchart illustrating a method for driving a touch sensing device according to an embodiment. Figure 10 It is a diagram illustrating touch sensing data calculated by the touch sensing circuit, and Figure 11 This is a graph illustrating valid touch data. It will be referenced below. Figure 7 and Figures 9 to 11 A method for driving a touch sensing device according to an embodiment is described in detail.

[0132] In the first step, a touch drive signal is applied to the drive electrode TE ( Figure 9 (S100). The drive signal output unit 410 outputs touch drive signals to the drive electrode TE via the first touch drive line TL1 and the second touch drive line TL2. The drive signal output unit 410 can output touch drive signals to the drive electrode TE in a predetermined order.

[0133] For example, the drive signal output unit 410 can sequentially output touch drive signals from the drive electrodes TE arranged in the leftmost first column C1 of the touch sensing area TSA to the drive electrodes TE arranged in the rightmost fifth column C5 of the touch sensing area TSA. That is, the drive signal output unit 410 can output touch drive signals to the drive electrodes TE arranged in the leftmost first column C1 of the touch sensing area TSA, and then output touch drive signals to the drive electrodes TE in the second column C2. Subsequently, the drive signal output unit 410 can output touch drive signals to the drive electrodes TE in the third column C3, output touch drive signals to the drive electrodes TE in the fourth column C4, and then output touch drive signals to the drive electrodes TE in the fifth column C5. In this case, the drive electrode TE in any column can refer to the drive electrode TE electrically connected in the second direction (Y-axis direction).

[0134] In the second step, the sensing circuit unit 420 senses the capacitance change (e.g., the amount of charge change) of each of the plurality of touch nodes TN and converts the capacitance change into touch sensing data TD as digital data. Figure 9 (S200).

[0135] The sensing circuit unit 420 senses the capacitance change of the mutual capacitance of the touch node TN corresponding to the intersection of the driving electrode TE and the sensing electrode RE through the touch sensing line RL.

[0136] When the drive signal output unit 410 outputs a touch drive signal to the drive electrode TE of the first column C1, the capacitance of each touch node TN between the drive electrode TE and the sensing electrode RE in the first column C1 can be charged. The sensing circuit unit 420 can sense the capacitance change value of each touch node TN corresponding to the intersection of the drive electrode TE and the sensing electrode RE in the first column C1 via the touch sensing line RL. For example, the operational amplifier AFE of the sensing circuit unit 420 can sense the capacitance change value of the touch node TN via the touch sensing line RL connected to the operational amplifier AFE. In addition, another operational amplifier AFE of the sensing circuit unit 420 can sense the capacitance change value of the touch node TN via the touch sensing line RL connected to the operational amplifier AFE.

[0137] The analog-to-digital converter 430 converts the capacitance change value of each touch node TN sensed by the operational amplifier AFE of the sensing circuit unit 420 into touch sensing data TD. The analog-to-digital converter 430 outputs the touch sensing data TD to the touch data compensator 450.

[0138] In the third step, touch sensing data TD that is equal to or greater than the first threshold is calculated as valid touch data VTD. Figure 9 (S300 in the middle).

[0139] like Figure 10 As shown, the touch data compensator 450 can receive all the touch sensing data TD from the touch nodes TN in the touch sensing area TSA. Figure 11 As shown, the touch data compensator 450 calculates valid touch data VTD from the touch sensing data TD of the touch node TN that is equal to or greater than a first threshold. The first threshold can be calculated by multiplying the maximum value of the touch sensing data TD by a predetermined ratio. For example, the predetermined ratio can be from 0.1 to 0.5. For example, the predetermined ratio can be 0.3. Figure 11 In this context, since the first threshold is 100, the effective touch data VTD can have a value of 100 or greater.

[0140] In the fourth step, the touch area ratio is calculated ( Figure 9 (S400 in the middle).

[0141] The touch data compensator 450 calculates the number of valid touch data VTDs relative to the total number of touch nodes TN in the touch sensing area TSA as a touch area ratio. Touch nodes TN correspond to the intersections of the driving electrode TE and the sensing electrode RE. Therefore, the total number of touch nodes TN is equal to the total number of intersections of the driving electrode TE and the sensing electrode RE.

[0142] In the fifth step, the touch sensing data TD is compensated based on the touch area ratio. Figure 9 (S500 in the middle).

[0143] The touch data compensator 450 calculates a compensation weighting value for the touch sensing data TD based on the touch area ratio and applies the compensation weighting value to the touch sensing data TD. The touch data compensator 450 can calculate the compensated touch sensing data by multiplying the touch sensing data TD by the compensation weighting value. (Refer to...) Figure 11 and Figure 12 This describes a method for compensating touch sensing data TD using a touch data compensator 450.

[0144] Figure 12 It is a graph illustrating the effective touch data based on the representative value of the touch area ratio for each user.

[0145] refer to Figure 12 The X-axis indicates the touch area ratio, and the Y-axis indicates the representative value of the effective touch data (VTD). Figure 12 The diagram illustrates the representative value of the effective touch data VTD based on the touch area ratio of user UA, user UB, and user UC.

[0146] The representative value of effective touch data VTD can be the average, median, or maximum value of effective touch data VTD. For each of user UA, user UB, and user UC, the representative value of effective touch data VTD tends to decrease as the touch area ratio increases. For example... Figure 8 As shown, due to the retransmission of charge from mutual capacitance Cm to finger F during large-area touch, which is transferred to another mutual capacitance Cm, the value of effective touch data VTD or touch sensing data TD can decrease as the touch area ratio increases.

[0147] Figure 13 This is a graph showing the correction rate of touch sensing data based on the touch area ratio.

[0148] refer to Figure 13The X-axis indicates the touch area ratio, and the Y-axis indicates the compensation weighting value of the touch sensing data TD. As the touch area ratio increases, the value of the effective touch data VTD decreases due to retransmission, and therefore the compensation weighting value of the touch sensing data TD can increase. The compensation weighting value of the touch sensing data TD can be proportional to the touch area ratio. The compensation weighting value of the touch sensing data TD can be calculated using Formula 1 below.

[0149] [Formula 1] Y = a × ln(X) + b

[0150] In Formula 1, X indicates the touch area ratio, Y indicates the compensation weighting value of the touch sensing data TD, and each of a and b is a real number. For example, a is 0.207 and b is 1.5456, but a and b are not limited to these.

[0151] Figure 13 The compensation weighting value YCR of the touch sensing data TD calculated by Formula 1 is shown. The compensation weighting value YCR of the touch sensing data TD calculated by Formula 1 can be 1.0 when the touch area ratio is approximately 8%, and can be 1.1 when the touch area ratio is approximately 11%. Furthermore, the compensation weighting value YCR of the touch sensing data TD calculated by Formula 1 can be 1.2 when the touch area ratio is approximately 19%, and can be 1.3 when the touch area ratio is approximately 31%.

[0152] In the sixth step, the touch coordinates are calculated based on the compensated touch sensing data TD. Figure 9 (S600 in the middle).

[0153] The touch data compensator 450 determines touch sensing data in the compensated touch sensing data TD that is equal to or greater than a second threshold. Then, the touch data compensator 450 calculates the coordinates of the touch sensing data that is equal to or greater than the second threshold as touch coordinates. The second threshold may be the same as or different from the first threshold.

[0154] As described above, due to the retransmission of charge from mutual capacitance Cm to finger F during large-area touch, which involves the transfer of charge to another mutual capacitance Cm, the touch sensing data TD can decrease as the touch area ratio increases. Therefore, the compensation weighting value of the touch sensing data TD can increase as the touch area ratio increases. Thus, the reduction in touch sensing data TD caused by retransmission during large-area touch can be compensated for, enabling stable recognition of large-area touches.

[0155] Figure 14 This is a perspective view of a display device according to another embodiment. Figure 15 This is a plan view of a display device according to another embodiment, and Figure 16 This is a cross-sectional view of a display device according to another embodiment. Figure 16 The diagram illustrates the following: along Figure 15 An example of a display panel cut off by line A-A'.

[0156] Figures 14 to 16 Implementation examples and Figures 1 to 3 The difference in this embodiment is that the display panel 100 includes a first substrate SUB1 on which display units DU are disposed and a second substrate SUB2 on which touch sensing units TDU are disposed, and the touch driving circuit 400 is disposed on the touch circuit board 500 instead of on the display circuit board 300. Reference will be made primarily to... Figures 14 to 16 Description and Figures 1 to 3 The differences.

[0157] refer to Figures 14 to 16 The display device 10 according to the embodiment includes a display panel 100, a display driving circuit 200, a display circuit board 300, a touch driving circuit 400, and a touch circuit board 500.

[0158] The display panel 100 includes a display unit DU and a touch sensing unit TDU. The touch sensing unit TDU can be arranged on the display unit DU. Since the area of ​​the touch sensing unit TDU is smaller than the area of ​​the display unit DU, a portion of the display unit DU can be exposed without being covered by the touch sensing unit TDU.

[0159] The display driver circuit 200 can be formed as an integrated circuit (IC) and attached to the display circuit board 300 by means of COF.

[0160] The display circuit board 300 can be arranged on the exposed side of the display unit DU that is not covered by the touch sensing unit TDU. The display circuit board 300 can be attached to the display pads of the display unit DU by a conductive adhesive member such as an anisotropic conductive film.

[0161] The touch driving circuit 400 can be arranged on the touch circuit board 500. The touch driving circuit 400 can be formed as an integrated circuit (IC) and attached to the touch circuit board 500.

[0162] The touch circuit board 500 can be disposed on one side of the touch sensing unit TDU. The touch circuit board 500 can be attached to the touch pads of the touch sensing unit TDU via a conductive adhesive member such as an anisotropic conductive film. Figure 17 (TP in the text). The touch sensing unit (TDU) can receive touch drive signals through the touch circuit board 500. The touch circuit board 500 can be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip on a film.

[0163] like Figure 16As shown, the display panel 100 includes a first substrate SUB1, a thin film transistor layer TFTL, a light-emitting element layer EML, an adhesive member SEAL, a second substrate SUB2, and a touch sensing unit TDU.

[0164] A thin-film transistor layer (TFTL) can be disposed on a first substrate (SUB1). A light-emitting element layer (EML) can be disposed on the TFTL.

[0165] The adhesive layer SEAL can bond the thin-film transistor layer (TFTL) to the second substrate SUB2. The adhesive layer SEAL can be a glass frit adhesive layer, an ultraviolet-curable resin layer, or a thermosetting resin layer, but is not limited to these. The space sealed by the adhesive layer SEAL between the light-emitting element layer (EML) and the second substrate SUB2 can be a vacuum layer. Alternatively, a filler film can be disposed between the light-emitting element layer (EML) and the second substrate SUB2 and sealed by the adhesive layer SEAL. The filler film can be an epoxy resin filler film or a silicone resin filler film, but is not limited to these.

[0166] The second substrate SUB2 may include an insulating material such as a polymer resin. For example, the second substrate SUB2 may include polyimide. The second substrate SUB2 may be a flexible substrate capable of being bent, folded, and rolled. The touch sensing unit TDU may be disposed on the second substrate SUB2.

[0167] Figure 17 It is a schematic diagram. Figure 16 Another example of a layout diagram of a touch sensing unit.

[0168] Figure 17 Implementation examples and Figure 4 The difference in the embodiment is that the dummy pattern DE is omitted, and the driving electrode TE and the sensing electrode RE have concave and convex surfaces on the plane to prevent moiré patterns from occurring due to the driving electrode TE and the sensing electrode RE when viewing the image on the display device 10. Therefore, Figure 17 The description will be omitted.

[0169] Figure 18 It is a diagram. Figure 17 An enlarged plan view of an example of a touch node, and Figure 19 It is shown in the diagram along Figure 18 A cross-sectional view of an example display panel taken by line II-II'. Figure 18 The diagram specifically illustrates the touch node TN' corresponding to the intersection of the driving electrode TE and the sensing electrode RE.

[0170] Figure 18 and Figure 19 Implementation examples and Figure 5 and Figure 6The difference in the embodiments is that the driving electrode TE and the sensing electrode RE are integral rather than in a mesh form, and the touch sensing unit TDU includes touch island electrodes TEI. Figure 18 and Figure 19 In, with Figure 5 and Figure 6 Descriptions that overlap with the embodiments are omitted.

[0171] refer to Figure 18 and Figure 19 The second substrate SUB2 is disposed on the light-emitting element layer EML. A vacuum layer or filling film may be disposed between the light-emitting element layer EML and the second substrate SUB2.

[0172] The touch sensing unit (TDU) is disposed on the second substrate (SUB2). Figure 18 and Figure 19 The diagram illustrates the driving electrode TE, the sensing electrode RE, the touch island electrode TEI arranged between the driving electrodes TE, and the connecting electrode BE2 of the touch sensing unit TDU.

[0173] Connection electrodes BE2 are formed on the second substrate SUB2. Each of the connection electrodes BE2 connects to the drive electrode TE and the touch island electrode TEI. One end of each of the connection electrodes BE2 can be connected to the drive electrode TE, and the other end can be connected to the touch island electrode TEI.

[0174] The connecting electrode BE2 may include an opaque metallic conductive layer. For example, the connecting electrode BE2 may include a single layer or multiple layers comprising any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof. Therefore, in order to prevent a reduction in the aperture ratio of the light-emitting region EA, such as... Figure 19 As shown, the connecting electrode BE2 does not overlap with the light-emitting region EA, and can be arranged to overlap with the embankment 190.

[0175] A first touch insulating layer TINS1' is formed on the connecting electrode BE2. The first touch insulating layer TINS1' may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0176] The driving electrode TE, the touch island electrode TEI, and the sensing electrode RE are disposed on the first touch insulating layer TINS1'. The driving electrode TE, the touch island electrode TEI, and the sensing electrode RE can be disposed separately from each other. The driving electrode TE, the touch island electrode TEI, and the sensing electrode RE can be electrically isolated from each other.

[0177] The driving electrode TE can be connected to the connecting electrode BE2 through a second touch contact hole TCNT2 that penetrates the first touch insulating layer TINS1' to expose the connecting electrode BE2. The touch island electrode TEI can be connected to the connecting electrode BE2 through a third touch contact hole TCNT3 that penetrates the first touch insulating layer TINS1' to expose the connecting electrode BE2. Therefore, the driving electrode TE and the touch island electrode TEI can be connected to each other through the connecting electrode BE2. Thus, the driving electrodes TE that are adjacent to each other in the second direction (Y-axis direction) can be electrically connected.

[0178] The driving electrode TE, the touch island electrode TEI, and the sensing electrode RE can include transparent metal oxides (TCOs) such as ITO or IZO that are capable of transmitting light. Therefore, even when the driving electrode TE, the touch island electrode TEI, and the sensing electrode RE overlap with the light-emitting region EA, the aperture ratio of the light-emitting region EA does not decrease.

[0179] A second touch insulating layer TINS2' is formed on the driving electrode TE, the touch island electrode TEI, and the sensing electrode RE. The second touch insulating layer TINS2' may include an inorganic layer, such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0180] In the touch sensing device according to an embodiment of the present invention, as the touch area ratio increases, the touch sensing data may decrease due to the retransmission of charge from mutual capacitance discharge to the finger to another mutual capacitance during large-area touches. Therefore, as the touch area ratio increases, the compensation weighting value of the touch sensing data TD can be increased. Thus, the reduction in touch sensing data caused by retransmission during large-area touches can be compensated, enabling stable recognition of large-area touches.

[0181] Although the inventive concept has been specifically shown and described with reference to embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to the embodiments without departing from the spirit and scope of the inventive concept.

Claims

1. A touch sensing device, comprising: Touch electrodes; The sensing circuit unit is configured to sense the capacitance change value of each of the plurality of touch nodes formed by the touch electrodes; An analog-to-digital converter is configured to output the capacitance change value of each of the plurality of touch nodes as touch sensing data as digital data; as well as A touch data compensator is configured to analyze the touch sensing data to calculate a touch area ratio, and is configured to calculate a compensation weighting value to be applied to the touch sensing data based on the touch area ratio, and to compensate the touch sensing data by multiplying each value in the touch sensing data by the compensation weighting value.

2. The touch sensing device according to claim 1, The touch data compensator determines the touch sensing data as valid touch data when the touch sensing data is equal to or greater than a threshold, and calculates the number of valid touch data relative to the number of the plurality of touch nodes as the touch area ratio.

3. The touch sensing device according to claim 2, The representative value of the effective touch data decreases as the touch area ratio increases.

4. The touch sensing device according to claim 3, The representative value of the effective touch data is the average, median, or maximum value of the effective touch data.

5. The touch sensing device according to claim 2, The compensation weighting value increases as the touch area ratio increases.

6. The touch sensing device according to claim 5, Wherein, when the touch area ratio is X and the compensation weighting value is Y, the compensation weighting value Y satisfies: Each of a and b is a real number.

7. The touch sensing device according to claim 1, The touch electrode comprises a driving electrode and a sensing electrode that are electrically separated from each other, and The plurality of touch nodes correspond to the intersection of the driving electrode and the sensing electrode.

8. The touch sensing device according to claim 7, further comprising: A drive signal output unit configured to apply touch drive signals to the drive electrodes.

9. The touch sensing device according to claim 7, The sensing circuit unit senses the capacitance change value of each of the plurality of touch nodes through each of the sensing electrodes.

10. A display device, comprising: The display unit includes a display area having pixels for displaying images; A touch sensing unit overlaps with the display area and includes a touch sensing area with touch electrodes; as well as The touch driving circuit is electrically connected to the touch electrode. The touch driving circuit includes: The sensing circuit unit is configured to sense the capacitance change value of each of the plurality of touch nodes formed by the touch electrodes; An analog-to-digital converter is configured to output the capacitance change value of each of the plurality of touch nodes as touch sensing data as digital data; and A touch data compensator is configured to analyze the touch sensing data to calculate a touch area ratio, and is configured to calculate a compensation weighting value to be applied to the touch sensing data based on the touch area ratio, and to compensate the touch sensing data by multiplying each value in the touch sensing data by the compensation weighting value.

11. The display device according to claim 10, The touch data compensator determines the touch sensing data as valid touch data when the touch sensing data is equal to or greater than a threshold, and calculates the number of valid touch data relative to the number of the plurality of touch nodes as the touch area ratio.

12. The display device according to claim 11, The representative value of the effective touch data decreases as the touch area ratio increases.

13. The display device according to claim 12, The representative value of the effective touch data is the average, median, or maximum value of the effective touch data.

14. The display device according to claim 11, The compensation weighting value increases as the touch area ratio increases.

15. The display device according to claim 14, Wherein, when the touch area ratio is X and the compensation weighting value is Y, the compensation weighting value Y satisfies: Each of a and b is a real number.

16. A method for driving a touch sensing device, the method comprising: The capacitance change value of each of the multiple touch nodes formed by the touch electrodes is sensed, and the capacitance change value is converted into touch sensing data as digital data; When the touch sensing data is equal to or greater than the threshold, the touch sensing data is determined to be valid touch data; The number of valid touch data is calculated relative to the number of multiple touch nodes as a touch area ratio; Calculate the compensation weighting value to be applied to the touch sensing data based on the touch area ratio; as well as The touch sensing data is compensated by multiplying each value in the touch sensing data by the compensation weighting value.

17. The method according to claim 16, The representative value of the effective touch data decreases as the touch area ratio increases.

18. The method according to claim 17, The representative value of the effective touch data is the average, median, or maximum value of the effective touch data.

19. The method according to claim 16, in, The compensation weighting value increases as the touch area ratio increases.

20. The method according to claim 19, Wherein, when the touch area ratio is X and the compensation weighting value is Y, the compensation weighting value Y satisfies: Each of a and b is a real number.

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