Display Devices

Abstract

A display device including a high-sensitivity touch sensor is provided. The display device includes: pixels arranged in a display area; sensing electrodes arranged in a sensing area at least partially overlapping the display area; sensing lines connected to corresponding sensing electrodes; noise detection electrodes disposed on the same layer as the sensing electrodes; and sensing paths each including a first input terminal connected to any one of the sensing electrodes and a second input terminal connected to the noise detection electrode, each of the sensing paths generating an output signal corresponding to a voltage difference between the first input terminal and the second input terminal.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority benefit of Korean Patent Application No. 10-2018-0012270 filed on January 31, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. Technical Field

[0003] Aspects of the present disclosure relate to a display device, and more particularly, to a display device including a touch sensor. Background Art

[0004] Touch screen display devices including touch sensors have been widely used to provide convenient input means. For example, the touch sensor is attached to one surface of the display device or is integrally manufactured with the display panel to sense touch input. Mobile touch screen display devices facilitate human interaction with the device without additional hardware or accessories. Summary of the invention

[0005] Embodiments provide a display device including a high-sensitivity touch sensor.

[0006] According to aspects of the present disclosure, there is provided a display device comprising: pixels arranged in a display area; sensing electrodes arranged in a sensing area at least partially overlapping the display area; sensing lines connected to corresponding sensing electrodes; noise detection electrodes disposed on the same layer as the sensing electrodes; and sensing paths each comprising a first input terminal connected to any one of the sensing electrodes and a second input terminal connected to the noise detection electrode, each of the sensing paths generating an output signal corresponding to a voltage difference between the first input terminal and the second input terminal.

[0007] The sensing line may be disposed on the same layer as the sensing electrode and the noise detection electrode.

[0008] In a sensor provided with sensing electrodes, a sensing line may be integrally coupled to any one of the sensing electrodes.

[0009] The display device may further include a driving electrode and a driving line coupled to the driving electrode, wherein the driving electrode is arranged in the sensing area, and the driving electrode is disposed on the same layer as the sensing electrode and the noise detection electrode.

[0010] In a sensor provided with driving electrodes and sensing electrodes, each of the driving lines may be integrally coupled to any one of the driving electrodes.

[0011] Each of the sensing electrodes may extend along a first direction in the sensing region. Each of the driving electrodes may be configured with a plurality of split electrodes distributed in the sensing region corresponding to predetermined coordinate points along the first direction and a second direction crossing the first direction.

[0012] The noise detection electrode may include: a first electrode portion provided at an outside of the sensing region; and a second electrode portion extending from the first electrode portion to an inside of the sensing region.

[0013] The second electrode part may extend along a first direction parallel to at least one of the sensing electrodes.

[0014] Each of the sensing electrodes may include an opening provided at an inner portion thereof. The second electrode portion of the noise detecting electrode may be branched from the first electrode into a plurality of parts, wherein the plurality of parts are located in the opening of each of the sensing electrodes.

[0015] The driving line may have a step shape, and the number of the step shapes corresponds to the position of the corresponding driving electrode.

[0016] The second electrode portion of the noise detection electrode may be disposed close to the driving line while having a stepped shape corresponding to the stepped shape of the driving line.

[0017] The second electrode portion may have a thin line structure, a mesh structure, a plate structure, or any combination thereof.

[0018] The display device may further include a dummy pattern disposed close to the driving line while having a length gradually changing corresponding to a step shape of the driving line.

[0019] The second electrode portion of the noise detection electrode may be disposed in parallel with the dummy pattern and disposed adjacent to the dummy pattern.

[0020] Each of the sensing electrodes may include at least one opening disposed at an inner portion thereof. The noise detection electrode may further include a third electrode portion disposed in the opening of each of the sensing electrodes.

[0021] The display device may further include an amplification circuit coupled between the noise detection electrode and the sensing path.

[0022] The gain value of the amplification circuit may be changed for each at least one sub-period among a plurality of sub-periods in which each of the driving electrodes is driven.

[0023] Each of the driving electrodes may extend along a first direction in the sensing region. Each of the sensing electrodes may be configured with a plurality of split electrodes distributed in the sensing region corresponding to predetermined coordinate points along the first direction and a second direction crossing the first direction.

[0024] The noise detection electrode may include: a first electrode portion provided at an outside of the sensing region; and a second electrode portion extending from the first electrode portion to an inside of the sensing region.

[0025] The sensing line may have a step shape whose number corresponds to the position of the corresponding sensing electrode, and the second electrode portion of the noise detecting electrode may be disposed near the sensing line while having a step shape corresponding to the step shape of the sensing line.

[0026] The second electrode part may have a mesh structure, a plate structure, or a complex structure in which the mesh structure and the plate structure are combined.

[0027] The display device may further include a dummy pattern disposed close to the sensing line while having a length gradually changing corresponding to a step shape of the sensing line.

[0028] The second electrode portion of the noise detection electrode may be configured with at least one thin line provided in parallel with the dummy pattern.

[0029] The display device may further include an amplification circuit coupled between the noise detection electrode and the sensing path.

[0030] The amplification circuit may include a gain amplifier and a plurality of resistors, wherein the gain amplifier is connected between the noise detection electrode and the sensing path, the plurality of resistors are connected in parallel with an output terminal of the gain amplifier, and the plurality of resistors are connected to different sensing paths among the plurality of sensing paths.

[0031] The sensing region may be divided into a plurality of sub-regions along at least one of a first direction and a second direction crossing each other. The sensing electrodes may be divided and disposed in different sub-regions, and each of the sensing electrodes is configured with a plurality of first separation electrodes distributed in the corresponding sub-region.

[0032] Each of the driving electrodes may be configured as a plurality of second separate electrodes, at least one of the plurality of second separate electrodes being disposed in each of the sub-regions.

[0033] The noise detection electrode may include: a first electrode portion provided at an outside of the sensing region; and a second electrode portion extending from the first electrode portion to an inside of the sensing region.

[0034] The second electrode portion may pass through a region between adjacent ones of the first separate electrodes.

[0035] The second electrode portion may be disposed between adjacent first and second separate electrodes, and may have a thin line structure, a mesh structure, a plate type structure, or a complex structure in which at least two of the structures are combined.

[0036] The display apparatus may further include a dummy pattern disposed between at least one of the driving electrodes and the second electrode part.

[0037] Each of the sensing electrodes may include at least one opening disposed at an inner portion thereof. The noise detection electrode may further include a third electrode portion disposed in the opening of each of the sensing electrodes.

[0038] The display device may further include an amplification circuit coupled between the noise detection electrode and the sensing path.

[0039] The amplification circuit may include a gain amplifier and a plurality of resistors, wherein the gain amplifier is connected between the noise detection electrode and the sensing path, the plurality of resistors are connected in parallel with an output terminal of the gain amplifier, and the plurality of resistors are connected to at least one of the sensing paths.

[0040] The gain value of the amplification circuit may be changed for each at least one sub-period among a plurality of sub-periods in which each of the driving electrodes is driven.

[0041] The sensing electrodes may be distributed at corresponding coordinate points along a first direction and a second direction crossing each other, and coupled to different ones of the sensing paths.

[0042] The noise detection electrode may include: a first electrode portion provided at an outside of the sensing region; and a second electrode portion extending from the first electrode portion to an inside of the sensing region so as to pass between adjacent sensing electrodes.

[0043] The second electrode part may have a thin line structure, a mesh structure, a plate structure, or a complex structure in which at least two of the structures are combined.

[0044] The display apparatus may further include a dummy pattern disposed between the second electrode part and the sensing electrode.

[0045] Each of the sensing electrodes may include at least one opening disposed at an inner portion thereof. The noise detection electrode may further include a third electrode portion disposed in the opening of each of the sensing electrodes.

[0046] The display device may further include an amplification circuit coupled between the noise detection electrode and the sensing path.

[0047] The amplification circuit may include a gain amplifier and a plurality of resistors, wherein the gain amplifier is connected between the noise detection electrode and the sensing path, the plurality of resistors are connected in parallel with an output terminal of the gain amplifier, and the plurality of resistors are connected to at least one of the sensing paths.

[0048] Among the sensing paths, a plurality of sensing paths corresponding to the sensing electrodes disposed on the same row of the sensing region may be commonly connected to any one of the resistors of the amplification circuit.

[0049] The sensing area may overlap with the display area.

[0050] According to aspects of the present disclosure, there is provided a display device comprising: pixels arranged in a display area; sensor electrodes distributed in a sensing area; sensor lines connected to corresponding sensor electrodes; noise detection electrodes disposed at the periphery of the sensor electrodes; dummy patterns disposed between the sensor electrodes and the noise detection electrodes; sensing pathways each comprising a first input terminal connected to at least one of the sensor electrodes and a second input terminal connected to the noise detection electrode, the sensing pathways each generating an output signal corresponding to a voltage difference between the first input terminal and the second input terminal; and a processor utilizing the output signals of the sensing pathways to detect touch input.

[0051] The sensor line may have a step shape, the number of which corresponds to the position of each sensor electrode. The dummy pattern may be disposed close to the sensor line while having a length that gradually changes corresponding to the step shape of the sensor line.

[0052] The noise detection electrode may include: a first electrode portion provided at an outside of the sensing region; and a second electrode portion extending from the first electrode portion to an inside of the sensing region, the second electrode portion having a step shape corresponding to the step shape of the sensor line.

[0053] The sensor electrodes, the sensor lines, and the noise detection electrodes may be provided on the same layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Now, exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings; however, these embodiments may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the exemplary embodiments to those skilled in the art.

[0055] In the accompanying drawings, for the sake of clear description, the size may be exaggerated. It should be understood that when an element is referred to as being "between" two elements, it can be the only element between the two elements, or one or more intervening elements may also exist. Throughout the specification, the same reference numerals represent the same elements.

[0056] Figure 1 A display device according to an embodiment of the present disclosure is shown.

[0057] Figure 2 A touch sensor according to an embodiment of the present disclosure is shown.

[0058] Figure 3The noise level of the sensor transmitted to the touch sensor according to an embodiment of the present disclosure is shown.

[0059] Figure 4 A touch sensor according to an embodiment of the present disclosure is shown.

[0060] Figure 5 Shown along Figure 4 An example of a cross section taken along line II′.

[0061] Figure 6 Shown with Figure 4 An embodiment related to the noise gain control method of the touch sensor shown in FIG.

[0062] Figure 7 Show Figure 4 Another embodiment of a sensor is shown in .

[0063] Figures 8 to 11 Show Figure 4 Other embodiments of the sensor are shown in .

[0064] Fig.12 A touch sensor according to another embodiment of the present disclosure is shown.

[0065] Fig.13 and Fig.14 Show Fig.12 Other embodiments of the sensor are shown in .

[0066] Fig.15 A touch sensor according to still another embodiment of the present disclosure is shown.

[0067] Fig.16 Shown with Fig.15 An embodiment related to the noise gain control method of the touch sensor shown in FIG.

[0068] Fig.17 Show Fig.15 A variation of the touch sensor.

[0069] Fig.18 Shown with Fig.17 An embodiment related to the noise gain control method of the touch sensor shown in FIG.

[0070] Figures 19 to 22 Show Fig.15 Other embodiments of the sensor are shown in .

[0071] Fig.23 A touch sensor according to still another embodiment of the present disclosure is shown.

[0072] Figure 24 to Figure 27 Show Fig.23Other embodiments of the sensor are shown in .

[0073] FIG. 28A to FIG. 28C Various embodiments are shown regarding the structures of the sensor electrodes and the noise detection electrodes. DETAILED DESCRIPTION

[0074] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the embodiments, but can be implemented in different forms. These embodiments are provided only for the purpose of description and are only provided for those skilled in the art to fully understand the scope of the present disclosure. Throughout the specification, when an element is referred to as "connected" or "coupled" to another element, it may be directly connected or directly coupled to the other element, or may be indirectly connected or indirectly coupled to the other element with one or more intervening elements interposed therebetween.

[0075] On the other hand, in the following embodiments and drawings, elements that are not directly related to the present disclosure are omitted from the description, and the dimensional relationship between the various elements in the drawings is shown only for ease of understanding, rather than for limiting the actual size. It should be noted that in the process of assigning reference numerals to the elements in each drawing, the same reference numerals represent the same elements even if the same elements are shown in different drawings.

[0076] Figure 1 A display device according to an embodiment of the present disclosure is shown. In some embodiments, Figure 1 In FIG. 1 , the display device 1 includes a touch sensor using a mutual capacitance method, but the kind of touch sensor that can be used in the display device 1 is not limited to the specific method as shown.

[0077] Reference Figure 1 , a display device 1 according to an embodiment of the present disclosure includes a panel unit 10 and a driving circuit 20 for driving the panel unit 10. In some embodiments, the panel unit 10 includes a display 110 (e.g., a display panel) for displaying an image and a sensor 120 (e.g., a touch screen or a touch sensing device) for sensing a touch input. On the other hand, the driving circuit 20 includes a display driver 210 for driving the display 110 and a sensor driver 220 for driving the sensor 120. In the display device 1, the display 110 and the display driver 210 may constitute a display unit, and the sensor 120 and the sensor driver 220 may constitute a sensing unit (e.g., a touch sensor).

[0078] In some embodiments, after the display 110 and the sensor 120 are manufactured independently of each other, the display 110 and the sensor 120 may be arranged and / or coupled so that at least one area of ​​the display 110 overlaps with at least one area of ​​the sensor 120. In another embodiment, the display 110 and the sensor 120 may be manufactured integrally. In one example, the sensor 120 may be formed directly on at least one substrate, such as an upper substrate and / or a lower substrate or a thin film encapsulation layer (TFE) of a display panel. In another example, the sensor 120 may be formed directly on another insulating layer of the display panel or on one of the various functional layers (such as an optical layer or a protective layer).

[0079] In such Figure 1 In the embodiment shown in , the sensor 120 is disposed at the front surface (the upper surface on which the image is displayed) of the display 110. In other embodiments, the sensor 120 may be disposed at a surface other than the front surface. For example, the sensor 120 may be disposed at the rear surface or both sides of the display 110. In yet another embodiment, the sensor 120 may be disposed in at least one edge region of the display 110.

[0080] The display 110 includes a display substrate 111 and a plurality of pixels PXL formed on the display substrate 111. The pixels PXL may be arranged in a display area DA on the display substrate 111.

[0081] The display substrate 111 includes a display area DA that displays an image and a non-display area NDA located at the periphery of the display area DA. In some embodiments, the display area DA may be located in a central area of ​​the display 110, and the non-display area NDA may be located at an edge area of ​​the display 110 and in the periphery surrounding the display area DA.

[0082] The display substrate 111 may be a rigid substrate or a flexible substrate, and the material or properties of the display substrate 111 are not particularly limited. For example, the display substrate 111 may be a rigid substrate configured with glass or tempered glass or a flexible substrate configured with a thin film made of plastic or metal.

[0083] In the display area DA, there are scan lines SL, data lines DL, and pixels PXL connected to the scan lines SL and the data lines DL. In some embodiments, the scan lines SL and the data lines DL may extend to the outside of the display area DA. When some of the pixels PXL are selected by the scan signals supplied from the scan lines SL to create selected pixels, the selected pixels may be supplied with data signals from the data lines DL so that these selected pixels emit light with brightness corresponding to the data signals. When the pixels PXL are supplied with data signals, images corresponding to the data signals are displayed in the display area DA. In the present disclosure, the structure and driving method of the pixels PXL are not particularly limited. For example, the pixels PXL may be implemented to have a variety of structures and / or may be driven using a variety of driving methods. As an example, each of the pixels PXL may be a self-luminous pixel including at least one organic light emitting diode (OLED), but the present disclosure is not limited thereto.

[0084] Various lines connected to the pixels PXL and / or built-in circuits of the display area DA may be provided in the non-display area NDA. As an example, a plurality of lines for supplying various driving power supplies and driving signals to the pixels PXL in the display area DA may be provided in the non-display area NDA. In addition, a scan driving circuit or the like may also be provided in the non-display area NDA to supply scan signals to the scan lines SL.

[0085] In the present disclosure, the type of display 110 is not particularly limited. For example, the display 110 may be implemented using a self-luminous display panel such as an organic light-emitting display panel (OLED panel). Alternatively, the display 110 may be implemented using a non-luminous display panel such as a liquid crystal display panel (LCD panel). When the display 110 is implemented using a non-luminous display panel, the display device 1 may further include a light source such as a backlight unit (BLU).

[0086] The sensor 120 includes a sensor substrate 121 and a plurality of sensor electrodes SEN formed on the sensor substrate 121. The sensor electrodes SEN may be disposed in a sensing area SA on the sensor substrate 121.

[0087] The sensor substrate 121 includes a sensing area SA that senses a touch input and a peripheral area NSA surrounding the sensing area SA. In some embodiments, the sensing area SA may be set to overlap with at least one area of ​​the display area DA. As an example, the sensing area SA may be set to an area corresponding to the display area DA (e.g., an area overlapping the display area DA), and the peripheral area NSA may be set to an area corresponding to the non-display area NDA (e.g., an area overlapping the non-display area NDA). In this case, when a touch input is provided in the display area DA, the touch input may be detected by the sensor 120.

[0088] The sensor substrate 121 may be a rigid substrate or a flexible substrate. In addition, the sensor substrate 121 may be configured with at least one insulating layer. In addition, the sensor substrate 121 may be a transparent or translucent light-transmitting substrate, but the present disclosure is not limited thereto. For example, the sensor substrate 121 may be a rigid substrate configured with glass or tempered glass, or may be a flexible substrate configured with a thin film made of plastic or metal. In some embodiments, at least one of the substrates constituting the display 110 (e.g., the display substrate 111, the encapsulation substrate, and / or the thin film encapsulation layer) may be used as the sensor substrate 121. In some embodiments, at least one insulating layer or functional layer disposed inside the display 110 and / or disposed at the outer surface of the display 110 may be used as the sensor substrate 121.

[0089] The sensing area SA is an active area of ​​the touch sensor, which is an area that can react to a touch input. The sensor electrode SEN for sensing the touch input may be arranged in the sensing area SA. In some embodiments, the sensor electrode SEN may include a drive electrode TX and a sensing electrode RX. A touch sensor using a mutual capacitance method may be implemented using the drive electrode TX and the sensing electrode RX. In the present disclosure, the drive electrode TX may be depicted as a first drive electrode, and the sensing electrode RX may be depicted as a second drive electrode.

[0090] In some embodiments, each of the conductive drive electrode TX and the sensing electrode RX may include at least one of a metal material, a transparent conductive material, and other conductive materials. As an example, each of the drive electrode TX and the sensing electrode RX may include at least one of a plurality of metal materials, including gold (Au), silver (Ag), aluminum (Al), molybdenum (Mo), chromium (Cr), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), platinum (Pt), etc. or any alloy thereof. In addition, each of the drive electrode TX and the sensing electrode RX may include at least one of a plurality of transparent conductive materials, including silver nanowires (AgNW), indium tin oxide (ITO), indium zinc oxide (IZO), antimony zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), tin oxide (SnO 2 ), carbon nanotubes, graphene, etc. In addition, each of the driving electrode TX and the sensing electrode RX may include at least one of a plurality of conductive materials. In addition, each of the driving electrode TX and the sensing electrode RX may be provided as a single layer or a multilayer, and its cross-sectional structure is not particularly limited.

[0091] In an embodiment of the present disclosure, the drive electrode TX and the sensing electrode RX may extend and / or be coupled in different directions. As an example, the drive electrode TX may extend along the X direction in the sensing area SA, and the sensing electrode RX may extend along the Y direction in the sensing area SA to intersect with the drive electrode TX. Alternatively, in another embodiment, the drive electrode TX may extend along the Y direction, and the sensing electrode RX may extend along the X direction. The drive electrode TX and the sensing electrode RX may be spaced apart from each other. As an example, when the drive electrode TX and the sensing electrode RX intersect each other, at least one insulating layer (or insulating pattern) or an isolation space (which at least covers the intersection) may be positioned between the drive electrode TX and the sensing electrode RX.

[0092] In addition, in another embodiment, the driving electrode TX and the sensing electrode RX may be distributed on the same layer of the sensing area SA without crossing each other. In this case, it is not necessary to set any interlayer insulating layer between the driving electrode TX and the sensing electrode RX, and the driving electrode TX and the sensing electrode RX can be patterned simultaneously by a single mask process. If the driving electrode TX and the sensing electrode RX are set on the same layer, the mask process can be minimized, so that the manufacturing cost of the touch sensor and the display device 1 including the touch sensor can be reduced. In addition, the thickness of the touch sensor and the display device 1 can be minimized.

[0093] In such Figure 1 In the illustrated embodiment, mutual capacitance Cse is formed between the driving electrode TX and the sensing electrode RX. The value of the mutual capacitance Cse depends on the touch input occurring at or near the corresponding point. Therefore, the touch input can be detected by sensing the change in the value of the mutual capacitance Cse.

[0094] On the other hand, sensor lines (e.g., driving lines and sensing lines) for electrically coupling the sensor electrodes SEN to the sensor driver 220 may be disposed in the peripheral area NSA of the sensor 120. As an example, a plurality of driving lines coupled to the corresponding driving electrodes TX and a plurality of sensing lines coupled to the corresponding sensing electrodes RX may be disposed in the peripheral area NSA.

[0095] In at least one embodiment, the driving circuit 20 includes a display driver 210 for driving the display 110 and a sensor driver 220 for driving the sensor 120. In some embodiments, the display driver 210 and the sensor driver 220 can be configured independently of each other. In still other embodiments, at least parts of the display driver 210 and the sensor driver 220 can be integrated together into one driver IC.

[0096] The display driver 210 is electrically coupled to the display 110 to drive the pixels PXL. For example, the display driver 210 may include a scan driver for supplying scan signals to the scan lines SL, a data driver for supplying data signals to the data lines DL, and a timing controller for controlling the scan driver and the data driver. In some embodiments, the scan driver, the data driver, and / or the timing controller may be integrated into a display IC (D-IC), but the present disclosure is not limited thereto. For example, in another embodiment, the scan driver, the data driver, and / or the timing controller may be built into the display 110.

[0097] The sensor driver 220 is electrically coupled to the sensor 120 to drive the sensor 120. As an example, during a period in which the touch sensor is enabled (e.g., a touch sensing period), the sensor driver 220 may receive a sensing signal corresponding to a touch drive signal from the sensing electrode RX, while supplying a touch drive signal to the driving electrode TX. The sensor driver 220 may include a touch drive circuit and a touch sensing circuit. In some embodiments, the touch drive circuit and the touch sensing circuit may be integrated into a touch IC (T-IC), but the present disclosure is not limited thereto. For example, in yet another embodiment, the touch drive circuit and the touch sensing circuit may be built into the sensor 120.

[0098] In some embodiments, the touch driving circuit is electrically connected to the driving electrode TX to supply a touch driving signal to the driving electrode TX. As an example, the touch driving circuit may sequentially supply a touch driving signal to one independent driving electrode among the driving electrodes TX at a time. On the other hand, the touch sensing circuit is electrically connected to the sensing electrodes RX to receive a sensing signal from each of the sensing electrodes RX. The touch sensing circuit detects a touch input using the sensing signal.

[0099] The display device 1 includes a touch sensor so as to provide convenience in use. For example, a user can easily control the display device 1 by touching the screen while viewing an image displayed in the display area DA.

[0100] Figure 2 FIG. 1 shows a touch sensor according to an embodiment of the present disclosure. Figure 2 , the configuration of the sensor 120 and the sensor driver 220 is shown for one channel of the touch sensor TS1.

[0101] Reference Figure 2 The touch sensor TS1 according to one embodiment of the present disclosure includes a pair of driving electrodes TX and sensing electrodes RX forming a mutual capacitance Cse. The driving electrodes TX and the sensing electrodes RX are electrically coupled to a touch driving circuit TDC and a touch sensing circuit TSC, respectively.

[0102] In the following, a driving method is described according to an embodiment of the present disclosure. Figure 2 The method of the touch sensor TS1 shown in FIG. During the touch sensing period in which the touch sensing mode is enabled, the touch drive signal Sdr is supplied from the touch drive circuit TDC to each drive electrode TX. In some embodiments, the touch drive signal Sdr may be an AC signal having a predetermined period, such as a square wave having a predetermined duty cycle.

[0103] On the other hand, when the sensor 120 is Figure 1 When a plurality of driving electrodes TX are included as described in the above, the touch driving circuit TDC may sequentially supply a touch driving signal Sdr to one independent driving electrode among the driving electrodes TX at a time during each predetermined touch sensing period. Then, due to the influence of the mutual capacitance Cse formed by each driving electrode TX and the sensing electrode RX in the vicinity thereof, as shown in FIG. Figure 2 As shown in FIG. 1 , the sensing signal Sse is caused by the touch driving signal Sdr applied to the driving electrode TX connected to the mutual capacitance Cse, and as shown in FIG. Figure 2 As shown in FIG. 1 , the induced sensing signal Sse is input to the sensing electrode RX connected to the mutual capacitance Cse. The sensing signal Sse is input to the touch sensing circuit TSC to be used in the detection of the touch input.

[0104] In some embodiments, when the sensor 120 is Figure 1 When a plurality of sensing electrodes RX are included as shown in FIG. 1 , the touch sensing circuit TSC may include a plurality of sensing paths (or receiving paths) 222 each electrically connected to a corresponding sensing electrode RX. The touch sensing circuit TSC receives each sensing signal Sse from a corresponding one of the sensing electrodes RX through one of the sensing paths 222, and detects a touch input by synthesizing the plurality of sensing signals Sse received in the plurality of sensing paths 222.

[0105] On the other hand, in some embodiments, each sensing electrode RX may constitute each sensing path 222 together with an amplifier AMP connected to the sensing electrode RX (or an analog front end (AFE) having the amplifier AMP). However, hereinafter, for convenience of description, the sensing electrode RX provided in the sensor 120 and the sensing path 222 constituting the signal receiver of the touch sensing circuit TSC will be described separately from each other.

[0106] The touch sensing circuit TSC amplifies, converts, and processes the sensing signal Sse input from each sensing electrode RX, and detects the touch input based on the result. To this end, the touch sensing circuit TSC may include each sensing path 222 corresponding to each sensing electrode RX and an analog-to-digital converter (ADC) 224 and a processor 226 connected to the sensing path 222.

[0107] In some embodiments, each sensing path 222 may be configured with an AFE that receives a sensing signal Sse from a sensing electrode RX corresponding thereto. As an example, each sensing path 222 may be implemented using an AFE including at least one amplifier AMP such as an operational amplifier (OP AMP).

[0108] In some embodiments, the sensing path 222 includes a first input terminal IN1 (e.g., an inverting input terminal of the amplifier AMP) and a second input terminal IN2 (e.g., a non-inverting input terminal of the amplifier AMP), and can generate an output signal corresponding to a voltage difference between the first input terminal IN1 and the second input terminal IN2. For example, the sensing path 222 can amplify (i.e., differentially amplify) and output a differential voltage between the first input terminal IN1 and the second input terminal IN2 with a corresponding predetermined gain.

[0109] In some embodiments, when a plurality of sensing electrodes RX and a plurality of sensing paths 222 corresponding to the plurality of sensing electrodes RX are provided, each of the first input terminals IN1 of the sensing paths 222 may be coupled to a different one of the sensing electrodes RX. Figure 2 The sensing electrodes RX shown in FIG. Figure 2 The sensing paths 222 shown in FIG. 224 may be connected in a one-to-one correspondence. In this case, a sensing signal Sse from any one of the sensing electrodes RX may be input to the first input terminal IN1 of each of the sensing paths 222 .

[0110] The second input terminal IN2 of each of the sensing paths 222 may be a reference potential terminal. As an example, the second input terminal IN2 may be connected to a reference voltage source such as a ground power supply GND. Therefore, the sensing path 222 amplifies and outputs the sensing signal Sse input to the first input terminal IN1 with reference to the potential of the second input terminal IN2. In other words, each sensing path 222 receives the sensing signal Sse from the corresponding sensing electrode RX through the first input terminal IN1, and amplifies and outputs a signal (differential voltage) proportional to the voltage difference between the first input terminal IN1 and the second input terminal IN2, which achieves the amplification of the sensing signal Sse.

[0111] In some embodiments, the amplifier AMP may be implemented using an integrator. In this case, the capacitive element Ca and the reset switch SWr may be coupled in parallel with each other between the first input terminal IN1 and the output terminal OUT1 of the amplifier AMP.

[0112] ADC 224 converts the analog signal input from each sensing path 222 into a digital signal. In some embodiments, the number of ADC 224 can match the number of sensing electrodes RX to establish a one-to-one correspondence between the sensing paths 222 and the corresponding sensing electrodes RX. Alternatively, in another embodiment, at least two sensing paths 222 can share one ADC 224. In this case, a switch for path selection can be additionally provided between the sensing path 222 and the ADC 224.

[0113] The processor 226 detects a touch input using the sensing signal Sse output from each sensing electrode RX. For example, the processor 226 receives input from each of the plurality of sensing electrodes RX via the corresponding sensing path 222 and the corresponding ADC 224 to generate a sensing signal Sse (i.e., an amplified and digitally converted sensing signal Sse), processes the sensing signal Sse into a predetermined form that can be analyzed, and comprehensively analyzes the sensing signal Sse output from the corresponding sensing electrode RX to detect whether a touch input occurs and the position of the touch input.

[0114] In some embodiments, the processor 226 may be implemented using a microprocessor (MPU), and a memory required to drive the processor 226 may be additionally provided in the touch sensing circuit TSC. In another embodiment, the processor 226 may be implemented using a microcontroller (MCU), and in some embodiments, the processor 226 may have an embedded memory.

[0115] On the other hand, as described above, the touch sensor TS1 may be coupled to the display 110 or the like. As an example, the sensor 120 may be manufactured integrally with the display 110, or may be attached to at least one surface of the display 110 after the sensor 120 and the display 110 are manufactured independently of each other. The display 110 and the sensor 120 may be disposed adjacent to each other. For example, in some embodiments, the display 110 and the sensor 120 may be disposed in close proximity and may be positioned to at least partially overlap each other.

[0116] When the display 110 and the sensor 120 are disposed adjacent to each other, in some configurations, a parasitic capacitance large enough to have an influence on the sensitivity of the touch sensor TS1 may be formed between the display 110 and the sensor 120. As an example, some of the driving electrodes TX and the sensing electrodes RX of the sensor 120 may be adjacent to the cathode electrodes or the common electrodes configured in the display 110 and may overlap the cathode electrodes and / or the common electrodes, which may form a relatively large parasitic capacitance between the display 110 and the sensor 120. Due to the coupling of the parasitic capacitance, display noise caused by a display driving signal applied to the display 110 may be transferred to the sensor 120.

[0117] As an example, in the display device 1 according to an embodiment of the present disclosure, the display 110 may be an organic light-emitting display panel including a thin film encapsulation layer, and the sensor 120 may be configured with an on-cell type sensor electrode SEN in which the driving electrode TX and the sensing electrode RX are directly formed on one surface (e.g., the upper surface) of the thin film encapsulation layer. In this case, at least one electrode (e.g., a cathode electrode) provided in the display 110 and the sensor electrode SEN are positioned adjacent to each other. Therefore, noise (e.g., common mode noise) caused by the driving of the display 110 is introduced into the sensor 120. Therefore, the sensitivity of the touch sensor TS1 may be deteriorated.

[0118] Specifically, the noise transmitted to the sensor 120 causes ripples in the sensing signal Sse. Due to such ripples, the touch sensitivity of the touch sensor TS1 may be degraded due to a decrease in the signal-to-noise ratio (SNR) of the touch sensor TS1. Therefore, the exemplary embodiments of the touch sensor TS1 and the display 110 as described in the present disclosure minimize malfunctions of the touch sensor TS1 and improve the sensitivity of the touch input.

[0119] Figure 3 1 shows the noise level of the sensor transmitted to the touch sensor according to the embodiment of the present disclosure. Specifically, Figure 3 The variation of noise level with respect to distance from the pad is shown. Different noise levels may exist at different locations of the sensor 120 .

[0120] For example, even in the same sensor 120, the noise level (e.g., noise voltage) may gradually increase as it approaches from a region (e.g., a lower region) adjacent to the pad of the display 110 and / or the sensor 120 toward a region (e.g., an upper region) away from the pad. When the noise level relative to the position in the sensor 120 is considered, the noise introduced into the sensor 120 will be more effectively removed.

[0121] Figure 4 A touch sensor according to an embodiment of the present disclosure is shown. Figure 5 Shown along Figure 4 An example of a cross section taken along line II′. Figure 4 and Figure 5 The touch sensor TS2 shown in FIG. 1 may be configured in the display device 1, for example, but the present disclosure is not limited thereto, and Figure 4 and Figure 5 The touch sensor TS2 can be configured in various other electronic devices. Figure 4 and Figure 5 In, with Figure 1 and Figure 2Similar or identical components of the embodiments are denoted by the same reference numerals, and their detailed description will be omitted.

[0122] Reference Figure 4 and Figure 5 In some embodiments, the touch sensor TS2 includes a plurality of driving electrodes TX1 to TX8 and a plurality of sensing electrodes RX1 to RX4 distributed in the sensor 120; the touch sensor TS2 also includes a plurality of driving lines (or first sensor lines) TXL1 to TXL8 and a plurality of sensing lines (or second sensor lines) RXL1 to RXL4 respectively connected to the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4. In some embodiments, the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4 spaced apart from each other may be disposed on the same layer of the sensor 120.

[0123] In some embodiments, each of the sensing electrodes RX1 to RX4 may extend along a first direction (e.g., a Y direction) in the sensing area SA to be arranged on a predetermined column of the sensor 120. Each of the sensing electrodes RX1 to RX4 is coupled to any one of the sensing paths 222 corresponding thereto. In some embodiments, each of the sensing electrodes RX1 to RX4 may be coupled to a first input terminal IN1 of any one of the sensing paths 222.

[0124] Each of the driving electrodes TX1 to TX8 may be configured with a plurality of separation electrodes TXd, which are distributed at positions corresponding to predetermined coordinate points (e.g., predetermined XY coordinate points) along a second direction (e.g., X direction) intersecting the first direction in the sensing area SA. In addition, the separation electrodes TXd arranged on the same row of the sensing area SA may be electrically connected to each other through each driving line (any one of TXL1 to TXL8) located inside and / or outside the sensor 120. As an example, the separation electrodes TXd arranged on the first row of the sensing area SA may be electrically connected to each other to constitute the first driving electrode TX1. The driving electrodes TX1 to TX8 may be connected to the touch driving circuit TDC to be supplied with a touch driving signal Sdr from the touch driving circuit TDC.

[0125] In some embodiments, the driving lines TXL1 to TXL8 and the sensing lines RXL1 to RXL4 may also be provided on the same layer as the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4 in the sensor 120. For example, each of the driving lines TXL1 to TXL8 may be integrally coupled to the driving electrode (any one of TX1 to TX8) corresponding thereto (or any one of the separate electrodes TXd constituting the driving electrode), and each of the sensing lines RXL1 to RXL4 may be integrally coupled to the sensing electrode (any one of RX1 to RX4) corresponding thereto.

[0126] In addition, the touch sensor TS2 according to this embodiment further includes a noise detection electrode NS disposed at the periphery of the sensing electrodes RX1 to RX4. In some embodiments, the noise detection electrode NS may be disposed on the same layer as the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4 while being spaced apart from the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4. Noise Sno having properties substantially the same as or similar to those of noise introduced into the sensing electrodes RX1 to RX4 (e.g., size and / or waveform) may be detected by the noise detection electrode NS.

[0127] In some embodiments, the noise detection electrode NS may include a first electrode portion NSe1 and a second electrode portion NSe2, wherein the first electrode portion NSe1 is disposed at the outside of the sensing area SA, and the second electrode portion NSe2 extends from the first electrode portion NSe1 to the inside of the sensing area SA. As an example, the first electrode portion NSe1 may be disposed to surround the sensing area SA, and the second electrode portion NSe2 may be disposed adjacent to and parallel to at least one sensing electrode among the sensing electrodes RX1 to RX4, wherein the second electrode portion NSe2 extends in the same direction as the sensing electrodes RX1 to RX4 in the sensing area SA. In addition, in some embodiments, the first electrode portion NSe1 and the second electrode portion NSe2 may be integrally connected.

[0128] Alternatively, in another embodiment, the noise detection electrode NS may be separated into a plurality of parts, which are formed at the inside of the sensor 120 and are integrally coupled together at the outside of the sensor 120. In this embodiment, the noise detection electrode NS may be coupled at the inside and / or the outside of the sensor 120 (for example, coupled to a flexible circuit board of the sensor 120). When the noise detection electrode NS is integrally coupled, the number of wires of the sensor 120 and / or the flexible circuit board may be reduced.

[0129] In some embodiments, the noise detection electrode NS may be coupled to the second input terminal IN2 of the sensing via 222. For example, the noise detection electrode NS may be generally coupled to the second input terminal IN2 of each of the sensing vias 222.

[0130] On the other hand, at least one insulating layer INS may be disposed over the driving electrodes TX1 to TX8 , the sensing electrodes RX1 to RX4 , and the noise detection electrode NS. Therefore, the stability of the driving electrodes TX1 to TX8 , the sensing electrodes RX1 to RX4 , and the noise detection electrode NS may be ensured.

[0131] In the above-described embodiment, each of the sensing paths 222 includes a first input terminal IN1 coupled to one of the sensing electrodes RX1 to RX4 and a second input terminal IN2 coupled to the noise detection electrode NS. In some embodiments, the second input terminal IN2 may be coupled to the noise detection electrode NS via the amplification circuit APC1. Each of the sensing paths 222 generates an output signal corresponding to a voltage difference between the first input terminal IN1 and the second input terminal IN2.

[0132] In operation, the noise Sno introduced into the sensor 120 is detected by the noise detection electrode NS, and the detected noise Sno can be used to reduce the noise component in the sensing signal Sse included in each sensing path 222. Specifically, each sensing path 222 amplifies the difference between the sensing signal Sse received from the corresponding sensing electrode (any one of RX1 to RX4) at the first input terminal IN1 and the noise Sno received from the noise detection electrode NS at the second input terminal IN2. Therefore, in each of the sensing paths 222, the noise component included in the sensing signal Sse can be eliminated or reduced.

[0133] The output signal Sse′ in analog form output from each sensing path 222 is converted into a digital value by the ADC 224, and then input to the processor 226 for detection of touch input. In some embodiments, the ADC 224 may convert the output signal Sse′ of each sensing path 222 into a digital value based on the potential of the noise Sno. To this end, the reference potential terminal of the ADC 224 may be connected to the noise detection electrode NS together with the second input terminal IN2 of the sensing path 222. In other words, in this embodiment, the reference potential of the touch sensing circuit TSC may be changed corresponding to the potential of the noise Sno. Therefore, in the touch sensing circuit TSC, the noise component carried in the sensing signal Sse may be removed or reduced.

[0134] In such Figure 4 In the embodiment of the present disclosure shown in , the touch sensor TS2 may further include an amplifying circuit APC1 coupled between the noise detecting electrode NS and the sensing path 222. The amplifying circuit APC1 may include at least one gain amplifier AMPg.

[0135] In some embodiments, the gain amplifier AMPg may include a third input terminal IN3 coupled to the noise detection electrode NS and a fourth input terminal IN4 coupled to a predetermined reference voltage source (eg, a ground power source). Figure 4Ra and Rb refer to the input resistor / output resistor of the gain amplifier AMPg. In some embodiments, the output terminal OUT2 of the gain amplifier AMPg can be connected to the sensing path 222 (specifically, each second input terminal IN2) via at least one gain resistor (or output resistor) Rg.

[0136] The above-mentioned amplification circuit APC1 amplifies the noise Sno input from the noise detection electrode NS with a predetermined gain value, and supplies the amplified noise Sno to the sensing path 222. Specifically, the gain value of the amplification circuit APC1 may be set so that the noise component of the sensing signal Sse can be effectively eliminated or reduced in each sensing path 222. As an example, when it is assumed that the size of the noise Sno gradually increases as it approaches the upper area of ​​the sensor 120 (for example, the area where the eighth driving electrode TX8 is provided) from the lower area of ​​the sensor 120 (for example, the area where the first driving electrode TX1 is provided), the gain value of the amplification circuit APC1 may be changed for each at least one sub-period among a plurality of sub-periods in which each driving electrode (any one of TX1 to TX8) is driven so that noise elimination is performed to the greatest extent.

[0137] Figure 6 Shown with Figure 4 An embodiment related to the noise gain control method of the touch sensor shown in FIG.

[0138] Referring to 6, a period P1 in which the driving electrodes TX1 to TX8 are successively driven may be configured with a plurality of sub-periods SP1 to SP8, in which the touch driving signal Sdr is supplied to each driving electrode (any one of TX1 to TX8). In addition, the gain values ​​G1 to G8 of the amplifier circuit APC1 may be controlled in each sub-period (any one of the sub-periods SP1 to SP8) to maximize noise elimination. As an example, during the i-th (i is a natural number) sub-period SPi in which the i-th driving electrode TXi is driven, the amplifier circuit APC1 may have a predetermined gain value Gi corresponding to the position of the driving electrode TXi.

[0139] On the other hand, Figure 6 In the embodiment of the present disclosure, the gain values ​​G1 to G8 of the amplifier circuit APC1 are shown to change in each sub-period (any one of the sub-periods SP1 to SP8), but the present disclosure is not limited thereto. For example, in another embodiment of the present disclosure, the gain values ​​G1 to G8 of the amplifier circuit APC1 may be changed in units of at least two sub-periods (at least two of the sub-periods SP1 to SP8).

[0140] In accordance with Figures 4 to 6In the touch sensor TS2 of the embodiment and the display device 1 including the touch sensor TS2, the noise Sno introduced into the sensor 120 is detected by the noise detection electrode NS, and the noise component included in the sensing signal Sse can be effectively removed by using the detected noise Sno. Therefore, the touch sensor TS2 operates more reliably with the enhanced sensitivity to the touch input. As an example, according to an embodiment of the present disclosure, the SNR of the touch sensor TS2 can be increased even when the sensor 120 is disposed adjacent to at least one driving electrode of the display 110.

[0141] In addition, according to the above-described embodiment, all the conductive patterns (e.g., the driving electrodes TX1 to TX8 and the driving lines TXL1 to TXL8, the sensing electrodes RX1 to RX4 and the sensing lines RXL1 to RXL4, and the noise detection electrode NS) may be disposed on the same layer of the sensor 120. Therefore, the conductive patterns may be formed simultaneously by the same mask process. Therefore, the number of mask processes for manufacturing the touch sensor TS2 may be minimized, thereby reducing the manufacturing cost of the touch sensor TS2 and the display device 1 including the touch sensor TS2. In addition, since the conductive patterns are disposed on the same layer, the thickness of the touch sensor TS2 and the display device 1 including the touch sensor TS2 may be reduced.

[0142] Figure 7 Shows Figure 4 Another embodiment of the sensor shown in Figure 7 In, with Figure 4 Similar or identical components of the embodiments are denoted by the same reference numerals, and their detailed description will be omitted.

[0143] Reference Figure 7 , at least a central portion of each of the sensing electrodes RX1 to RX4 may be open. As an example, each of the sensing electrodes RX1 to RX4 may include an opening OP disposed therein. Each opening OP may extend in the same direction (ie, the first direction) as the sensing electrodes RX1 to RX4.

[0144] The second electrode portion NSe2 of the noise detection electrode NS may be disposed in each opening OP. As an example, the second electrode portion NSe2 may be branched from the first electrode portion NSe1 of the noise detection electrode NS into a plurality of portions so as to be located in the opening OP of each of the sensing electrodes RX1 to RX4. Here, the second electrode portion NSe2 may be disposed to be spaced apart from each sensing electrode (any one of RX1 to RX4) by a predetermined distance to enhance electrical stability (e.g., insulation properties) between the sensing electrodes RX1 to RX4 and the noise detection electrode NS.

[0145] As described in at least one of the above embodiments, if the noise detection electrode NS (for example, the second electrode portion NSe2) is provided at the central portion of each sensing electrode (any one of RX1 to RX4) to be surrounded by the sensing electrode, the sensing electrodes RX1 to RX4 are provided between the driving electrodes TX1 to TX8 and the noise detection electrode NS. Therefore, the variation of the noise Sno due to the touch driving signal Sdr detected from the noise detection electrode NS is reduced. Therefore, according to Figure 7 In the embodiment, the noise introduced into the sensor 120 is detected with higher accuracy while the noise compensation (or cancellation) efficiency is increased.

[0146] Figures 8 to 11 Shown with Figure 4 Some other embodiments of various variations of the sensor. Figures 8 to 11 In, with Figure 4 Similar or identical components of the embodiments may be referred to by the same reference numerals, and their detailed description will be omitted.

[0147] Reference Figure 8 , each of the drive lines TXL may have a step shape, and the number of step shapes corresponds to the position of the drive electrode (any one of TX1 to TX8) connected thereto. In addition, each second electrode portion NSe2 may be arranged near the drive line TXL, and have a step shape corresponding to the step shape of the drive line TXL. For example, each second electrode portion NSe2 may be arranged to be spaced apart from the drive line TXL adjacent thereto, and have a step shape complementary to the step shape of the drive line TXL. In addition, in some embodiments, each second electrode portion NSe2 may have a grid structure in which a plurality of fine lines are combined.

[0148] according to Figure 8 In the embodiment of the present invention, the second electrode portion NSe2 of the noise detection electrode NS is provided in a space obtained by forming each of the drive lines TXL into a step shape. Figure 4 Compared with the embodiment of the present invention, the internal space of the sensing area can be effectively used. Figure 8 In the embodiment, there is no need to increase the distance between the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4 to obtain a space for forming the second electrode portion NSe2. Therefore, the size of the mutual capacitance Cse between the driving electrodes TX1 to TX8 and the sensing electrodes RX1 to RX4 is sufficiently ensured, so that the touch input can be sensed with high sensitivity.

[0149] Reference Fig. 9 , each second electrode portion NSe2 may have a plate-type structure. Optionally, in another embodiment, the second electrode portion NSe2 may have Figure 8 and Fig. 9 A complex structure in which the grid structure and the plate-type structure shown in FIG. 1 are combined (eg, a multilayer structure in which the plate-type electrode layer and the grid-type electrode layer are stacked).

[0150] according to Fig. 9 In the embodiment, the area of ​​the noise detection electrode NS is Figure 8 Therefore, the noise Sno introduced into the sensor 120 can be detected more effectively.

[0151] Reference Fig.10 The sensor 120 may further include a dummy pattern DMP disposed adjacent to each second electrode portion NSe2 to form a stepped pattern portion together with the second electrode portion NSe2. For example, each second electrode portion NSe2 and the dummy pattern DMP adjacent thereto may be disposed near the driving line TXL while having a length that gradually changes corresponding to the stepped shape of the driving line TXL.

[0152] In some embodiments, each second electrode portion NSe2 may be connected to the first electrode portion NSe1 to constitute a noise detection electrode NS together with the first electrode portion NSe1. Each second electrode portion NSe2 may be configured with at least one thin line. In addition, each virtual pattern DMP may have a suspended independent pattern. As an example, the second electrode portion NSe2 and the virtual pattern DMP may be arranged in parallel to be spaced apart from each other, while each having a thin line shape (thin line structure) extending along the first direction. In addition, in some embodiments, at least one second electrode portion NSe2 may be arranged adjacent to any one of the sensing electrodes RX1 to RX4. In other words, in some embodiments, the shape and / or structure and position of the second electrode portion NSe2 may be variously changed.

[0153] according to Fig.10 In the embodiment of the present invention, the pattern closest to each sensing electrode (any one of RX1 to RX4) among the patterns having a thin line shape (which constitutes the step-type pattern portion adjacent to the driving line TXL of each column) is connected to the first electrode portion NSe1 to serve as the noise detection electrode NS, and the other patterns are suspended to form a dummy pattern DMP. Figure 8 Compared with the embodiment of the present invention, the separation distance between the driving electrodes TX1 to TX8 and the noise detection electrode NS (specifically, the second electrode portion NSe2) can be increased. Therefore, the change of the noise Sno caused by the touch driving signal Sdr is minimized, and the noise Sno introduced into the sensor 120 can be more effectively detected.

[0154] Reference Fig.11, each of the sensing electrodes RX1 to RX4 may further include at least one opening OP disposed at an interior thereof. As an example, each of the sensing electrodes RX1 to RX4 may include a plurality of openings OP repeated at a certain distance and / or in a certain shape. In addition, the noise detection electrode NS may further include a third electrode portion NSe3, which is disposed in the opening OP to be spaced apart from each sensing electrode (any one of RX1 to RX4). In some embodiments, the third electrode portion NSe3 may be integrally connected to the first electrode portion NSe1 and the second electrode portion NSe2.

[0155] on the other hand, Fig.11 The third electrode portion NSe3 is shown in FIG. Fig.10 The embodiment of the sensor 120 of the embodiment of the present disclosure is not limited thereto. For example, in another embodiment of the present disclosure, the third electrode portion NSe3 may be added according to Figure 8 or Fig. 9 Sensor 120 of an embodiment.

[0156] according to Fig.11 In the embodiment, the area of ​​the noise detection electrode NS is Fig.10 Compared with the embodiment of the present invention, the noise Sno introduced into the sensor 120 can be increased. Therefore, the noise Sno introduced into the sensor 120 can be detected more effectively. In addition, according to the above-mentioned embodiment, the area of ​​the noise detection electrode NS at the position closest to the sensing electrodes RX1 to RX4 can be increased. Therefore, the noise Sno having a property (for example, size and / or waveform) more similar to the noise introduced into the sensing electrodes RX1 to RX4 is detected, and the noise compensation (elimination) efficiency can be improved.

[0157] Fig.12 A touch sensor according to another embodiment of the present disclosure is shown. Fig.12 Components similar or identical to those of the above-described embodiment are denoted by the same reference numerals, and their detailed description will be omitted.

[0158] Reference Fig.12 ,and Figures 4 to 11 Compared with the embodiment of the present invention, the arrangement structure of the driving electrodes TX1 to TX4 and the sensing electrodes RX1 to RX8 may be changed inversely. For example, each of the sensing electrodes RX1 to RX8 may be configured with a plurality of separation electrodes RXd, and the plurality of separation electrodes RXd are distributed in the sensing area SA along a first direction (e.g., Y direction) and a second direction (e.g., X direction) crossing the first direction corresponding to the corresponding coordinate points.

[0159] In addition, the separation electrodes RXd disposed on the same row of the sensing area SA may be electrically coupled to each other through each sensing line (any one of RXL1 to RXL8) at the inside and / or outside of the sensor 120. As an example, the separation electrodes RXd disposed on the first row of the sensing area SA may be coupled to each other to constitute a first sensing electrode RX1. Each of the sensing electrodes RX1 to RX8 may be coupled to a first input terminal IN1 of any one of the sensing paths 222.

[0160] On the other hand, each of the driving electrodes TX1 to TX4 may extend along the first direction (eg, the Y direction) in the sensing area SA. The driving electrodes TX1 to TX4 may be coupled to the touch driving circuit TDC to be supplied with a touch driving signal Sdr from the touch driving circuit TDC.

[0161] According to the above embodiment, Figure 4 , Figure 8 Compared with the embodiment shown in FIG. 1 , etc., the total area of ​​the sensing electrodes RX1 to RX8 is reduced. Therefore, noise introduced into the sensing electrodes RX1 to RX8 from the outside of the sensor 120 (eg, the display 110) can be reduced.

[0162] In addition, in the touch sensor TS3 according to this embodiment, each of the sensing lines RXL is formed into a step shape. As an example, each of the sensing lines RXL may have a step shape, the number of which corresponds to the position of the corresponding sensing electrode (any one of RX1 to RX8). The second electrode portion NSe2 of the noise detection electrode NS is disposed in a space obtained by forming each of the sensing lines RXL into a step shape. As an example, the second electrode portion NSe2 may be disposed near the sensing line RXL while having a step shape corresponding to the step shape of the sensing line RXL. In some embodiments, the second electrode portion NSe2 may have a grid structure, but the present disclosure is not limited thereto.

[0163] According to the above-described embodiment, it is possible to ensure a space where the second electrode portion NSe2 is to be disposed without increasing the distance between the driving electrodes TX1 to TX4 and the sensing electrodes RX1 to RX8 . Therefore, the touch input may have enhanced sensitivity.

[0164] In addition, in the touch sensor TS3 according to this embodiment, the amplification circuit APC2 may include a plurality of gain resistors (or output resistors) Rg1 to Rg8 connected in parallel with the output terminal OUT2 of the gain amplifier AMPg. The gain resistors Rg1 to Rg8 may be connected to different sensing paths among the sensing paths 222. As an example, the amplification circuit APC2 may include a plurality of gain resistors Rg1 to Rg8 connected to corresponding sensing paths 222. Alternatively, in another embodiment, the amplification circuit APC2 may include a plurality of gain resistors (e.g., some of Rg1 to Rg8) arranged in units of groups each configured with at least two sensing paths 222.

[0165] According to the above-described embodiment, the resistance values ​​of the gain resistors Rg1 to Rg8 are individually controlled, so that the magnitude of the noise Sno input to the corresponding sensing path 222 can be individually controlled. Therefore, although the noise component in the sensing signal Sse transmitted to the corresponding sensing electrodes RX1 to RX8 has different degrees (e.g., magnitude) according to the positions of the sensing electrodes RX1 to RX8, the magnitude of the noise Sno input to the second input terminal IN2 is optimized and controlled for each sensing path 222, so that the noise component of the sensing signal Sse can be effectively removed or reduced. Therefore, a touch input can be detected with higher sensitivity.

[0166] Fig.13 and Fig.14 Shown with Fig.12 Some other embodiments of various variations of the sensor. Fig.13 and Fig.14 In, with Fig.12 Similar or identical components of the embodiments may be referred to by the same reference numerals, and their detailed description will be omitted.

[0167] Reference Fig.13 , each second electrode portion NSe2 may have a plate-type structure. Optionally, in another embodiment, the second electrode portion NSe2 may have Fig.12 and Fig.13 A complex structure in which the grid structure and the plate structure shown in FIG. 1 are combined (for example, a multilayer structure in which the plate-type electrode layer and the grid-type electrode layer are stacked). Fig.13 implementation method, and Fig.12 Compared with the embodiment of FIG. 1 , the area of ​​the noise detection electrode NS is increased, so that the noise Sno introduced into the sensor 120 can be detected more effectively.

[0168] Reference Fig.14, the sensor 120 may further include a virtual pattern DMP disposed near the sensing line RXL. In some embodiments, the virtual pattern DMP may be implemented using a suspended pattern in the shape of a thin line having a length that gradually changes corresponding to the step shape of the sensing line RXL adjacent thereto. In addition, each second electrode portion NSe2 constituting the noise detection electrode NS may be configured with at least one thin line disposed parallel to the virtual pattern DMP. As an example, when each second electrode portion NSe2 is configured with a plurality of thin lines, the thin lines may be connected in a grid structure. In addition, in some embodiments, the virtual pattern DMP may be positioned between at least one driving electrode (at least one of TX1 to TX4) and the second electrode portion NSe2.

[0169] according to Fig.14 implementation method, and Fig.12 Compared with the embodiment of the present invention, the separation distance between the driving electrodes TX1 to TX4 and the noise detection electrode NS (specifically, the second electrode portion NSe2) can be increased. Therefore, the change of the noise Sno caused by the touch driving signal Sdr can be prevented or reduced, and the noise compensation (elimination) efficiency can be improved.

[0170] On the other hand, in addition to Figure 12 to Figure 14 In addition to the embodiment shown in FIG. 1 , various variations and embodiments of the structure of the sensor 120 are possible. As an example, in accordance with Figure 12 to Figure 14 In any of the embodiments of the sensor 120, such as Fig.11 As shown in the embodiment of FIG. 1 , the opening OP may be formed in the sensing electrodes RX1 to RX8 , and the third electrode portion NSe3 and the like may be further provided in the opening OP of the sensor 120 .

[0171] Fig.15 A touch sensor according to still another embodiment of the present disclosure is shown. Fig.16 Shown with Fig.15 The embodiment related to the noise gain control method of the touch sensor shown in Fig.15 and Fig.16 Components similar to or identical to those of the above-described embodiment are denoted by the same reference numerals, and their detailed description will be omitted.

[0172] First, refer to Fig.15 , the sensing area SA may be divided into a plurality of sub-areas AR1 to AR3 along at least a first direction (eg, Y direction). As an example, the sensing area SA may be divided into a first sub-area AR1 set as an upper area, a second sub-area AR2 set as a middle area, and a third sub-area AR3 set as a lower area.

[0173] In some embodiments, the sensing electrodes RX1 to RX3 may be arranged in units of sub-regions AR1 to AR3. As an example, the first sensing electrode RX1 may be arranged in the first sub-region AR1, the second sensing electrode RX2 may be arranged in the second sub-region AR2, and the third sensing electrode RX3 may be arranged in the third sub-region AR3. In addition, each of the sensing electrodes RX1 to RX3 may be divided into a first separation electrode RXd arranged in a corresponding sub-region (any one of AR1 to AR3) along a second direction (e.g., X direction). In some embodiments, each of the sensing electrodes RX1 to RX3 may be arranged in one of different sub-regions AR1 to AR3, and each of the sensing electrodes RX1 to RX3 may be configured with a plurality of first separation electrodes RXd distributed in the corresponding sub-region.

[0174] Each of the driving electrodes TX1 to TX12 may be configured with a plurality of second separation electrodes TXd, and at least one of the plurality of second separation electrodes TXd is provided for each sub-region (any one of AR1 to AR3). In addition, the second separation electrodes TXd may be connected in the form of a connection chain. For example, in order to form any one of the driving electrodes (i.e., any one of TX1 to TX12), each second separation electrode TXd in the formed driving electrode may be connected to at least one other second separation electrode TXd provided in a different sub-region to form a pair. As described above, when the connection chain structure is applied to the sensing area SA divided into a plurality of sub-regions AR1 to AR3, the number of lines (e.g., driving lines TXL and sensing lines RXL) extending from the sensor 120 may be reduced, and a relatively high resolution may be achieved.

[0175] In such Fig.15 In the touch sensor TS4 shown in FIG. 1 , the positions of the sub-areas AR1 to AR3 may be implemented to correspond to the sensing electrodes RX1 to RX3, and the specific positions of the sub-areas AR1 to AR3 may be implemented to correspond to the driving electrodes TX1 to TX12 in each of the sub-areas AR1 to AR3. Therefore, when a touch input occurs, the point (or coordinate) where the touch input occurs may be detected. In another embodiment of the present disclosure, the position of the sub-areas AR1 to AR3 may be changed inversely. Fig.15 The arrangement structure of the driving electrodes TX1 to TX12 and the sensing electrodes RX1 to RX3 is shown in FIG. In this case, the principle of detecting a point at which a touch input occurs may be substantially the same, and a detailed description thereof will not be repeated.

[0176] In addition, the touch sensor TS4 according to the embodiment includes a noise detection electrode NS for detecting noise Sno, which can be used to differentially compensate for the detected noise Sno. In some embodiments, the noise detection electrode NS may include a first electrode portion NSe1 and a second electrode portion NSe2, wherein the first electrode portion NSe1 is disposed outside the sensing area SA, and the second electrode portion NSe2 extends from the first electrode portion NSe1 to the inside of the sensing area SA.

[0177] In some embodiments, the second electrode portion NSe2 may be disposed adjacent to the sensing electrodes RX1 to RX3. For example, the second electrode portion NSe2 passes through a region between adjacent first split electrodes (eg, first split electrodes in the first sub-region AR1 and the second sub-region AR2) among the first split electrodes RXd.

[0178] In addition, the touch sensor TS4 according to the embodiment may include an amplification circuit APC3 connected between the noise detection electrode NS and the sensing path 222. In some embodiments, the amplification circuit APC3 may include a gain amplifier AMPg connected between the noise detection electrode NS and the sensing path 222 and a plurality of gain resistors Rg1 to Rg3 connected in parallel with the output terminal OUT2 of the gain amplifier AMPg. As an example, the amplification circuit APC3 may include first to third gain resistors Rg1 to Rg3, the first to third gain resistors Rg1 to Rg3 being connected between the gain amplifier AMPg and the second input terminal IN2 of the amplifier AMP in the first, second, and third sensing paths 222, respectively, while the first input terminal IN1 of the amplifier AMP in the first, second, and third sensing paths 222 is connected to the first sensing electrode RX1, the second sensing electrode RX2, and the third sensing electrode RX3, respectively. Therefore, the amplification gain of the noise Sno may be individually controlled for each sub-area (any one of AR1 to AR3) provided for each sensing electrode (any one of RX1 to RX3).

[0179] In addition, in some embodiments, Fig.16 As shown in , in order to maximize noise cancellation, the gain value G1-1 to G3-12 of the amplifier circuit APC3 may be changed for each of the sub-periods SP1 to SP12 in which the touch drive signal Sdr is supplied to each drive electrode (any one of TX1 to TX12). In other embodiments, the gain value G1-1 to G3-12 of the amplifier circuit APC3 may be changed after two or more of the sub-periods SP1 to SP12.

[0180] According to the above-described embodiment, the magnitude of the noise Sno input to the sensing path 222 may be individually controlled for each position (or coordinate) of the sensor 120. Therefore, the noise component included in the sensing signal Sse may be more effectively removed or reduced.

[0181] Fig.17 Show Fig.15 A variation of the touch sensor. Fig.18 Shown with Fig.17 The embodiment related to the noise gain control method of the touch sensor shown in Fig.17 and Fig.18 Components similar to or identical to those of the above-described embodiment are denoted by the same reference numerals, and their detailed description will be omitted.

[0182] First, refer to Fig.17 , the sensing area SA may be divided into a plurality of sub-areas ARij (i and j are natural numbers) along a first direction (e.g., Y direction) and a second direction (e.g., X direction). As an example, the sensing area SA may be divided into an eleventh sub-area AR11 set as an upper left area, a twenty-first sub-area AR21 set as a left middle area, a thirty-first sub-area AR31 set as a lower left area, a twelfth sub-area AR12 set as an upper right area, a twenty-second sub-area AR22 set as a right middle area, and a thirty-second sub-area AR32 set as a lower right area.

[0183] In addition, different sensing electrodes RX1 to RX6 may be arranged in units of sub-regions ARij. As an example, the first sensing electrode RX1 may be arranged in the eleventh sub-region AR11, the second sensing electrode RX2 may be arranged in the twenty-first sub-region AR21, the third sensing electrode RX3 may be arranged in the thirty-first sub-region AR31, the fourth sensing electrode RX4 may be arranged in the twelfth sub-region AR12, the fifth sensing electrode RX5 may be arranged in the twenty-second sub-region AR22, and the sixth sensing electrode RX6 may be arranged in the thirty-second sub-region AR32. In some embodiments, each of the sensing electrodes RX1 to RX6 may be configured with a plurality of first separation electrodes RXd, which are distributed along the first direction and / or the second direction in the corresponding sub-region ARij.

[0184] On the other hand, each of the driving electrodes TX1 to TX6 may be configured with a plurality of second separation electrodes TXd, at least one of which is disposed in each of the sub-regions ARij. In addition, the second separation electrodes TXd may be connected in the form of a connection chain. Therefore, the number of lines (e.g., driving lines TXL and sensing lines RXL) drawn from the sensor 120 may be reduced, and a relatively high resolution may be achieved.

[0185] On the other hand, in the touch sensor TS4′ according to the embodiment, each of the gain resistors Rg1 to Rg3 of the amplification circuit APC3 may be coupled to a plurality of sensing paths 222. As an example, the first gain resistor Rg1 may be coupled to two sensing paths 222 respectively coupled to the first sensing electrode RX1 and the fourth sensing electrode RX4. In addition, the second gain resistor Rg2 may be coupled to two sensing paths 222 respectively coupled to the second sensing electrode RX2 and the fifth sensing electrode RX5, and the third gain resistor Rg3 may be coupled to two sensing paths 222 respectively coupled to the third sensing electrode RX3 and the sixth sensing electrode RX6.

[0186] In addition, in some embodiments, Fig.18 As shown in , in order to maximize noise elimination, the gain value G1-1 to G3-6 of the amplifier circuit APC3 can be changed for each of the sub-periods SP1 to SP6 in which the touch drive signal Sdr is supplied to each drive electrode (any one of TX1 to TX6). Therefore, the noise component included in the sensing signal Sse can be more effectively removed or reduced.

[0187] Figures 19 to 22 Show Fig.15 Other embodiments of the sensor are shown in . Figures 19 to 22 Show Fig.15 Different modifications of the sensor. Figures 19 to 22 Components similar to or identical to those of the above-described embodiment are denoted by the same reference numerals, and their detailed description will be omitted.

[0188] Reference Fig.19 , at least some of the sensing lines RXL and the driving lines TXL may have a step shape. In addition, the second electrode portion NSe2 of the noise detecting electrode NS may have a mesh structure.

[0189] In some embodiments, the noise detection electrode NS may include a plurality of second electrode portions NSe2 branched from the first electrode portion NSe1. In addition, each second electrode portion NSe2 may be disposed between adjacent first and second separation electrodes RXd and TXd, or may be disposed near at least one first separation electrode RXd.

[0190] Reference Fig. 20 , each second electrode portion NSe2 may have a plate-type structure. Optionally, in another embodiment, the second electrode portion NSe2 may have a thin-line structure, a mesh structure, a plate-type structure, or a complex structure in which at least two of the structures are combined.

[0191] Reference Fig.21, each second electrode portion NSe2 may be configured with at least one thin line adjacent to at least one sensing electrode (any one of RX1 to RX3) (or at least one first separation electrode RXd). In addition, the sensor 120 may further include a dummy pattern DMP. In some embodiments, the dummy pattern DMP may be disposed between at least one second electrode portion NSe2 and at least one driving electrode (any one of TX1 to TX12) (or at least one second separation electrode TXd) and / or may be disposed near at least one second electrode portion NSe2.

[0192] Reference Fig. 22 , each of the sensing electrodes RX1 to RX3 (or the first separation electrode RXd) may include at least one opening OP disposed at an inner portion thereof. In addition, the noise detection electrode NS may further include a third electrode portion NSe3 disposed in the opening OP of each of the sensing electrodes RX1 to RX3. In some embodiments, the first electrode portion NSe1 to the third electrode portion NSe3 in the noise detection electrode NS may be integrally coupled to each other.

[0193] Fig.23 FIG. 2 shows a touch sensor according to another embodiment of the present disclosure. Fig.23 Components similar to or identical to those of the above-described embodiment are denoted by the same reference numerals, and their detailed description will be omitted.

[0194] Reference Fig.23 , the touch sensor TS5 according to the embodiment of the present disclosure can be implemented as a touch sensor using a self-capacitance method. As an example, in Figure 1 In the display device 1 shown in FIG. 1 , the structures and driving methods of the sensor 120 and the sensor driver 220 may be changed.

[0195] In some embodiments, sensor electrodes (or sensing electrodes) SEN′ distributed in a matrix form may be provided in the sensing area SA of the sensor 120. As an example, the sensor electrodes SEN′ may be distributed at coordinate points along a first direction and a second direction (e.g., X direction, Y direction) that intersect each other to be spaced apart from each other. Each of the sensor electrodes SEN′ may be connected to any one of the sensing paths 222′ through each sensor line (or sensing line) SEL. On the other hand, for convenience, Fig.23 1 and 2 representatively show one of the sensing paths 222' connected to a plurality of sensor electrodes SEN' (e.g., sensor electrodes S11 to S14 arranged in the first row). However, like a conventional structure using a point-type self-capacitance method, the sensor electrode SEN' may be connected to different sensing paths 222' through different sensor lines SEL.

[0196] In addition, the touch sensor TS5 according to this embodiment includes a noise detection electrode NS for detecting noise Sno and differentially compensating for the noise Sno. In some embodiments, the noise detection electrode NS may include a first electrode portion NSe1 disposed at the outside of the sensing area SA and a second electrode portion NSe2 extending from the first electrode portion NSe1 to the inside of the sensing area SA.

[0197] In some embodiments, the second electrode portion NSe2 may be disposed adjacent to the sensor electrode SEN′. For example, the second electrode portion NSe2 may extend along the first direction (e.g., the Y direction) for each column in which the sensor electrode SEN′ is disposed so as to be disposed parallel to the sensor electrode SEN′. In addition, each second electrode portion NSe2 may be branched into a plurality of portions so as to pass through adjacent sensor electrodes SEN′.

[0198] On the other hand, each sensing path 222′ may include an amplifier AMP, a first switch SW1 connected between a first input terminal IN1 of the amplifier AMP and any one of the sensor electrodes SEN′, and a second switch SW2 connected between a second input terminal IN2 of the amplifier AMP and the noise detection electrode NS. The first switch SW1 and the second switch SW2 are alternately turned on during a touch sensing period in which the touch sensor TS5 is enabled. If the second switch SW2 of the sensing path 222′ is turned on, a predetermined voltage (e.g., a precharge voltage) Vp is transferred to the sensor electrode SEN′. Therefore, the sensor electrode SEN′ is charged with the voltage. On the other hand, if the first switch SW1 of the sensing path 222′ is turned on, a sensing signal Sse is input from a corresponding sensor electrode in the sensor electrodes SEN′ to each of the sensing paths 222′.

[0199] In the above embodiment, the reference potential terminal of the sensing path 222' (ie, the second input terminal IN2) and the reference potential terminal of the ADC 224 may be connected to the noise detection electrode NS. Therefore, the noise component of the sensing signal Sse may be removed or reduced in the sensor driver 220 by using a differential compensation method of the noise Sno detected from the noise detection electrode NS.

[0200] In addition, the touch sensor TS5 may further include an amplifying circuit APC4 connected between the noise detecting electrode NS and the sensing path 222'. In some embodiments, the amplifying circuit APC4 may include a gain amplifier AMPg and gain resistors Rg1 to Rg8. The gain amplifier AMPg may be connected between the noise detecting electrode NS and the sensing path 222'. In addition, each of the gain resistors Rg1 to Rg8 may be connected to at least one sensing path 222'. As an example, the second input terminal IN2 of the sensing path 222' connected to the sensor electrodes Si1 to Si4 of the i-th row may generally be connected to any one of the gain resistors Rg1 to Rg8. Therefore, the amplification gain of the noise Sno may be differentially controlled along the first direction (e.g., the Y direction).

[0201] Figure 24 to Figure 27 Show Fig.23 Other embodiments of the sensor are shown in . Figure 24 to Figure 27 Show Fig.23 Different modifications of the sensor. Figure 24 to Figure 27 Components similar to or identical to those of the above-described embodiment are denoted by the same reference numerals, and their detailed description will be omitted.

[0202] Reference Fig.24 , each sensor line SEL may have a step shape, and the number of step shapes corresponds to the position of the sensor electrode SEN′ connected thereto. In addition, the second electrode portion NSe2 of the noise detection electrode NS may have a step shape corresponding to the step shape of the sensor line SEL. As an example, each second electrode portion NSe2 may have a step shape complementary to the step shape of the sensor line SEL adjacent thereto. In addition, each second electrode portion NSe2 may be implemented as a grid structure configured with a plurality of fine lines.

[0203] Reference Fig.25 , each second electrode portion NSe2 may have a plate-type structure. Optionally, in another embodiment, the second electrode portion NSe2 may have a thin-line structure, a mesh structure, a plate-type structure, or a complex structure in which at least two of the structures are combined.

[0204] Reference Fig.26 , each of the second electrode portions NSe2 may be implemented using at least one straight line, and the suspended dummy pattern DMP may be disposed between the second electrode portion NSe2 and the sensor electrode SEN′.

[0205] Reference Fig. 27, each of the sensor electrodes SEN′ may include at least one opening OP disposed at an inner portion thereof. In addition, the noise detection electrode NS may further include a third electrode portion NSe3 disposed in the opening OP of each of the sensor electrodes SEN′. In some embodiments, the first electrode portion NSe1 to the third electrode portion NSe3 in the noise detection electrode NS may be integrally coupled to each other.

[0206] FIG. 28A to FIG. 28C Various embodiments are shown regarding the structures of the sensor electrodes and the noise detection electrodes.

[0207] Reference Fig.28A , each of the sensor electrodes SEN and SEN' and / or the noise detection electrode NS may have a plate type structure. As an example, each of the sensor electrodes SEN and SEN' and / or the noise detection electrode NS may be implemented as a separate plate type electrode configured with at least one transparent conductive layer.

[0208] Reference Fig.28B and Fig.28C , each of the sensor electrodes SEN and SEN′ and / or the noise detection electrode NS may have a grid-type structure, and the shape of the grid may be variously changed. As an example, each of the sensor electrodes SEN and SEN′ and / or the noise detection electrode NS may be implemented as a grid-type electrode configured with a metal thin wire FL having a low resistance characteristic.

[0209] In addition, in some embodiments, each of the sensor electrodes SEN and SEN' and / or the noise detection electrode NS may have a structure in which a plate type structure and a grid type structure are combined. As an example, each of the sensor electrodes SEN and SEN' and / or the noise detection electrode NS may be implemented as an electrode having a multi-layer structure including at least one transparent conductive layer and at least one grid type electrode disposed on the top or bottom of the transparent conductive layer.

[0210] In a touch sensor and a display device including a touch sensor according to some embodiments of the present disclosure, noise is detected in a noise detection electrode implemented in the sensor, and the detected noise is used to eliminate the noise component of the sensing signal. Therefore, the exemplary embodiments of the touch sensor and the display described in the present disclosure minimize the malfunction of the touch sensor and improve the sensitivity of the touch input.

[0211] In addition, in the touch sensor and the display device including the touch sensor according to some embodiments of the present disclosure, both the sensor electrode and the noise detection electrode are provided on the same layer of the sensor. Therefore, the manufacturing cost of the touch sensor and the display device can be reduced by minimizing the number of mask processes, and the thickness of the touch sensor and the display device can be minimized.

[0212] Exemplary embodiments have been disclosed herein, and although specific terms are employed, they are used and interpreted in a general and descriptive sense only, and not for purposes of limitation. In some instances, as will be apparent to one of ordinary skill in the art when this application is filed, unless otherwise specifically noted, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure as set forth in the appended claims.

Claims

1. Display equipment, including: Pixels, arranged in a display area; A sensing electrode arranged in a sensing area at least partially overlapping the display area; Sensing wires, connected to the corresponding sensing electrodes; a noise detection electrode disposed on the same layer as the sensing electrode; sensing paths each including a first input terminal coupled to any one of the sensing electrodes and a second input terminal coupled to the noise detection electrode, each of the sensing paths generating an output signal corresponding to a voltage difference between the first input terminal and the second input terminal; as well as A driving electrode arranged in the sensing area; The noise detection electrode includes a first electrode portion and a second electrode portion. wherein the sensing area is defined by two opposite portions of the second electrode portion and the first electrode portion connecting the two opposite portions of the second electrode portion; The sensing electrode and the driving electrode are all arranged in the sensing area defined by two opposite portions of the second electrode portion and the first electrode portion connecting the two opposite portions of the second electrode portion.

2. The display device according to claim 1, wherein: The sensing line is disposed on the same layer as the sensing electrode and the noise detection electrode.

3. The display device according to claim 2, wherein: In the sensor provided with the sensing electrodes, each of the sensing lines is integrally coupled to any one of the sensing electrodes.

4. The display device according to claim 1, further comprising: A driving line connected to the driving electrode; The driving electrode is disposed on the same layer as the sensing electrode and the noise detection electrode.

5. The display device according to claim 4, wherein: In the sensor provided with the driving electrodes and the sensing electrodes, each of the driving lines is integrally coupled to any one of the driving electrodes.

6. The display device according to claim 4, wherein: Each of the sensing electrodes extends along a first direction in the sensing region, and Each of the driving electrodes is configured with a plurality of split electrodes, and the plurality of split electrodes are distributed in the sensing area corresponding to predetermined coordinate points along the first direction and a second direction crossing the first direction.

7. The display device according to claim 6, wherein: The second electrode portion extends from the first electrode portion to an interior of the sensing region.

8. The display device according to claim 7, wherein: Each of the sensing electrodes includes at least one opening disposed at the inner portion of the sensing electrode, The noise detection electrode further includes a third electrode portion, and the third electrode portion is disposed in the opening of each of the sensing electrodes. 9 . The display device of claim 6 , further comprising an amplifying circuit coupled between the noise detecting electrode and the sensing path.

10. The display device according to claim 4, wherein: Each of the driving electrodes extends along a first direction in the sensing region, and Each of the sensing electrodes is configured with a plurality of split electrodes, and the plurality of split electrodes are distributed in the sensing region corresponding to predetermined coordinate points along the first direction and a second direction crossing the first direction.

11. The display device according to claim 4, wherein: The sensing area is divided into a plurality of sub-areas along at least one of a first direction and a second direction intersecting each other, and The sensing electrodes are divided and arranged in different sub-regions, and each of the sensing electrodes is configured with a plurality of first separation electrodes, which are distributed in corresponding sub-regions.

12. Display equipment, including: Pixels, arranged in a display area; sensor electrodes, distributed in the sensing area; sensor wires connected to corresponding sensor electrodes; A noise detection electrode is arranged at the periphery of the sensor electrode; a dummy pattern disposed between the sensor electrode and the noise detection electrode; sensing pathways, each including a first input terminal coupled to at least one of the sensor electrodes and a second input terminal coupled to the noise detection electrode, the sensing pathways each generating an output signal corresponding to a voltage difference between the first input terminal and the second input terminal; as well as a processor, detecting a touch input using the output signal of the sensing path; wherein the sensor line has a step shape, and the number of the step shapes corresponds to the position of each of the sensor electrodes, The dummy pattern is arranged close to the sensor line and has a length that gradually changes corresponding to the step shape of the sensor line.

13. The display device according to claim 12, wherein: The noise detection electrode comprises: A first electrode portion disposed outside the sensing area; and The second electrode portion extends from the first electrode portion to the inside of the sensing region, and the second electrode portion has a stepped shape corresponding to the stepped shape of the sensor line.

14. The display device according to claim 12, wherein: The sensor electrode, the sensor line, and the noise detection electrode are provided on the same layer.

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